1/* libFLAC - Free Lossless Audio Codec library 2 * Copyright (C) 2000-2009 Josh Coalson 3 * Copyright (C) 2011-2014 Xiph.Org Foundation 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 9 * - Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 12 * - Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * - Neither the name of the Xiph.org Foundation nor the names of its 17 * contributors may be used to endorse or promote products derived from 18 * this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 33#ifdef HAVE_CONFIG_H 34# include <config.h> 35#endif 36 37#include <limits.h> 38#include <stdio.h> 39#include <stdlib.h> /* for malloc() */ 40#include <string.h> /* for memcpy() */ 41#include <sys/types.h> /* for off_t */ 42#include "share/compat.h" 43#include "FLAC/assert.h" 44#include "FLAC/stream_decoder.h" 45#include "protected/stream_encoder.h" 46#include "private/bitwriter.h" 47#include "private/bitmath.h" 48#include "private/crc.h" 49#include "private/cpu.h" 50#include "private/fixed.h" 51#include "private/format.h" 52#include "private/lpc.h" 53#include "private/md5.h" 54#include "private/memory.h" 55#include "private/macros.h" 56#if FLAC__HAS_OGG 57#include "private/ogg_helper.h" 58#include "private/ogg_mapping.h" 59#endif 60#include "private/stream_encoder.h" 61#include "private/stream_encoder_framing.h" 62#include "private/window.h" 63#include "share/alloc.h" 64#include "share/private.h" 65 66 67/* Exact Rice codeword length calculation is off by default. The simple 68 * (and fast) estimation (of how many bits a residual value will be 69 * encoded with) in this encoder is very good, almost always yielding 70 * compression within 0.1% of exact calculation. 71 */ 72#undef EXACT_RICE_BITS_CALCULATION 73/* Rice parameter searching is off by default. The simple (and fast) 74 * parameter estimation in this encoder is very good, almost always 75 * yielding compression within 0.1% of the optimal parameters. 76 */ 77#undef ENABLE_RICE_PARAMETER_SEARCH 78 79 80typedef struct { 81 FLAC__int32 *data[FLAC__MAX_CHANNELS]; 82 unsigned size; /* of each data[] in samples */ 83 unsigned tail; 84} verify_input_fifo; 85 86typedef struct { 87 const FLAC__byte *data; 88 unsigned capacity; 89 unsigned bytes; 90} verify_output; 91 92typedef enum { 93 ENCODER_IN_MAGIC = 0, 94 ENCODER_IN_METADATA = 1, 95 ENCODER_IN_AUDIO = 2 96} EncoderStateHint; 97 98static struct CompressionLevels { 99 FLAC__bool do_mid_side_stereo; 100 FLAC__bool loose_mid_side_stereo; 101 unsigned max_lpc_order; 102 unsigned qlp_coeff_precision; 103 FLAC__bool do_qlp_coeff_prec_search; 104 FLAC__bool do_escape_coding; 105 FLAC__bool do_exhaustive_model_search; 106 unsigned min_residual_partition_order; 107 unsigned max_residual_partition_order; 108 unsigned rice_parameter_search_dist; 109 const char *apodization; 110} compression_levels_[] = { 111 { false, false, 0, 0, false, false, false, 0, 3, 0, "tukey(5e-1)" }, 112 { true , true , 0, 0, false, false, false, 0, 3, 0, "tukey(5e-1)" }, 113 { true , false, 0, 0, false, false, false, 0, 3, 0, "tukey(5e-1)" }, 114 { false, false, 6, 0, false, false, false, 0, 4, 0, "tukey(5e-1)" }, 115 { true , true , 8, 0, false, false, false, 0, 4, 0, "tukey(5e-1)" }, 116 { true , false, 8, 0, false, false, false, 0, 5, 0, "tukey(5e-1)" }, 117 { true , false, 8, 0, false, false, false, 0, 6, 0, "tukey(5e-1);partial_tukey(2)" }, 118 { true , false, 12, 0, false, false, false, 0, 6, 0, "tukey(5e-1);partial_tukey(2)" }, 119 { true , false, 12, 0, false, false, false, 0, 6, 0, "tukey(5e-1);partial_tukey(2);punchout_tukey(3)" } 120 /* here we use locale-independent 5e-1 instead of 0.5 or 0,5 */ 121}; 122 123 124/*********************************************************************** 125 * 126 * Private class method prototypes 127 * 128 ***********************************************************************/ 129 130static void set_defaults_(FLAC__StreamEncoder *encoder); 131static void free_(FLAC__StreamEncoder *encoder); 132static FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize); 133static FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples, FLAC__bool is_last_block); 134static FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, FLAC__bool is_last_block); 135static void update_metadata_(const FLAC__StreamEncoder *encoder); 136#if FLAC__HAS_OGG 137static void update_ogg_metadata_(FLAC__StreamEncoder *encoder); 138#endif 139static FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block, FLAC__bool is_last_block); 140static FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block); 141 142static FLAC__bool process_subframe_( 143 FLAC__StreamEncoder *encoder, 144 unsigned min_partition_order, 145 unsigned max_partition_order, 146 const FLAC__FrameHeader *frame_header, 147 unsigned subframe_bps, 148 const FLAC__int32 integer_signal[], 149 FLAC__Subframe *subframe[2], 150 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2], 151 FLAC__int32 *residual[2], 152 unsigned *best_subframe, 153 unsigned *best_bits 154); 155 156static FLAC__bool add_subframe_( 157 FLAC__StreamEncoder *encoder, 158 unsigned blocksize, 159 unsigned subframe_bps, 160 const FLAC__Subframe *subframe, 161 FLAC__BitWriter *frame 162); 163 164static unsigned evaluate_constant_subframe_( 165 FLAC__StreamEncoder *encoder, 166 const FLAC__int32 signal, 167 unsigned blocksize, 168 unsigned subframe_bps, 169 FLAC__Subframe *subframe 170); 171 172static unsigned evaluate_fixed_subframe_( 173 FLAC__StreamEncoder *encoder, 174 const FLAC__int32 signal[], 175 FLAC__int32 residual[], 176 FLAC__uint64 abs_residual_partition_sums[], 177 unsigned raw_bits_per_partition[], 178 unsigned blocksize, 179 unsigned subframe_bps, 180 unsigned order, 181 unsigned rice_parameter, 182 unsigned rice_parameter_limit, 183 unsigned min_partition_order, 184 unsigned max_partition_order, 185 FLAC__bool do_escape_coding, 186 unsigned rice_parameter_search_dist, 187 FLAC__Subframe *subframe, 188 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents 189); 190 191#ifndef FLAC__INTEGER_ONLY_LIBRARY 192static unsigned evaluate_lpc_subframe_( 193 FLAC__StreamEncoder *encoder, 194 const FLAC__int32 signal[], 195 FLAC__int32 residual[], 196 FLAC__uint64 abs_residual_partition_sums[], 197 unsigned raw_bits_per_partition[], 198 const FLAC__real lp_coeff[], 199 unsigned blocksize, 200 unsigned subframe_bps, 201 unsigned order, 202 unsigned qlp_coeff_precision, 203 unsigned rice_parameter, 204 unsigned rice_parameter_limit, 205 unsigned min_partition_order, 206 unsigned max_partition_order, 207 FLAC__bool do_escape_coding, 208 unsigned rice_parameter_search_dist, 209 FLAC__Subframe *subframe, 210 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents 211); 212#endif 213 214static unsigned evaluate_verbatim_subframe_( 215 FLAC__StreamEncoder *encoder, 216 const FLAC__int32 signal[], 217 unsigned blocksize, 218 unsigned subframe_bps, 219 FLAC__Subframe *subframe 220); 221 222static unsigned find_best_partition_order_( 223 struct FLAC__StreamEncoderPrivate *private_, 224 const FLAC__int32 residual[], 225 FLAC__uint64 abs_residual_partition_sums[], 226 unsigned raw_bits_per_partition[], 227 unsigned residual_samples, 228 unsigned predictor_order, 229 unsigned rice_parameter, 230 unsigned rice_parameter_limit, 231 unsigned min_partition_order, 232 unsigned max_partition_order, 233 unsigned bps, 234 FLAC__bool do_escape_coding, 235 unsigned rice_parameter_search_dist, 236 FLAC__EntropyCodingMethod *best_ecm 237); 238 239static void precompute_partition_info_sums_( 240 const FLAC__int32 residual[], 241 FLAC__uint64 abs_residual_partition_sums[], 242 unsigned residual_samples, 243 unsigned predictor_order, 244 unsigned min_partition_order, 245 unsigned max_partition_order, 246 unsigned bps 247); 248 249static void precompute_partition_info_escapes_( 250 const FLAC__int32 residual[], 251 unsigned raw_bits_per_partition[], 252 unsigned residual_samples, 253 unsigned predictor_order, 254 unsigned min_partition_order, 255 unsigned max_partition_order 256); 257 258static FLAC__bool set_partitioned_rice_( 259#ifdef EXACT_RICE_BITS_CALCULATION 260 const FLAC__int32 residual[], 261#endif 262 const FLAC__uint64 abs_residual_partition_sums[], 263 const unsigned raw_bits_per_partition[], 264 const unsigned residual_samples, 265 const unsigned predictor_order, 266 const unsigned suggested_rice_parameter, 267 const unsigned rice_parameter_limit, 268 const unsigned rice_parameter_search_dist, 269 const unsigned partition_order, 270 const FLAC__bool search_for_escapes, 271 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, 272 unsigned *bits 273); 274 275static unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples); 276 277/* verify-related routines: */ 278static void append_to_verify_fifo_( 279 verify_input_fifo *fifo, 280 const FLAC__int32 * const input[], 281 unsigned input_offset, 282 unsigned channels, 283 unsigned wide_samples 284); 285 286static void append_to_verify_fifo_interleaved_( 287 verify_input_fifo *fifo, 288 const FLAC__int32 input[], 289 unsigned input_offset, 290 unsigned channels, 291 unsigned wide_samples 292); 293 294static FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data); 295static FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data); 296static void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data); 297static void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data); 298 299static FLAC__StreamEncoderReadStatus file_read_callback_(const FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data); 300static FLAC__StreamEncoderSeekStatus file_seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data); 301static FLAC__StreamEncoderTellStatus file_tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data); 302static FLAC__StreamEncoderWriteStatus file_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data); 303static FILE *get_binary_stdout_(void); 304 305 306/*********************************************************************** 307 * 308 * Private class data 309 * 310 ***********************************************************************/ 311 312typedef struct FLAC__StreamEncoderPrivate { 313 unsigned input_capacity; /* current size (in samples) of the signal and residual buffers */ 314 FLAC__int32 *integer_signal[FLAC__MAX_CHANNELS]; /* the integer version of the input signal */ 315 FLAC__int32 *integer_signal_mid_side[2]; /* the integer version of the mid-side input signal (stereo only) */ 316#ifndef FLAC__INTEGER_ONLY_LIBRARY 317 FLAC__real *real_signal[FLAC__MAX_CHANNELS]; /* (@@@ currently unused) the floating-point version of the input signal */ 318 FLAC__real *real_signal_mid_side[2]; /* (@@@ currently unused) the floating-point version of the mid-side input signal (stereo only) */ 319 FLAC__real *window[FLAC__MAX_APODIZATION_FUNCTIONS]; /* the pre-computed floating-point window for each apodization function */ 320 FLAC__real *windowed_signal; /* the integer_signal[] * current window[] */ 321#endif 322 unsigned subframe_bps[FLAC__MAX_CHANNELS]; /* the effective bits per sample of the input signal (stream bps - wasted bits) */ 323 unsigned subframe_bps_mid_side[2]; /* the effective bits per sample of the mid-side input signal (stream bps - wasted bits + 0/1) */ 324 FLAC__int32 *residual_workspace[FLAC__MAX_CHANNELS][2]; /* each channel has a candidate and best workspace where the subframe residual signals will be stored */ 325 FLAC__int32 *residual_workspace_mid_side[2][2]; 326 FLAC__Subframe subframe_workspace[FLAC__MAX_CHANNELS][2]; 327 FLAC__Subframe subframe_workspace_mid_side[2][2]; 328 FLAC__Subframe *subframe_workspace_ptr[FLAC__MAX_CHANNELS][2]; 329 FLAC__Subframe *subframe_workspace_ptr_mid_side[2][2]; 330 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace[FLAC__MAX_CHANNELS][2]; 331 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_workspace_mid_side[FLAC__MAX_CHANNELS][2]; 332 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr[FLAC__MAX_CHANNELS][2]; 333 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents_workspace_ptr_mid_side[FLAC__MAX_CHANNELS][2]; 334 unsigned best_subframe[FLAC__MAX_CHANNELS]; /* index (0 or 1) into 2nd dimension of the above workspaces */ 335 unsigned best_subframe_mid_side[2]; 336 unsigned best_subframe_bits[FLAC__MAX_CHANNELS]; /* size in bits of the best subframe for each channel */ 337 unsigned best_subframe_bits_mid_side[2]; 338 FLAC__uint64 *abs_residual_partition_sums; /* workspace where the sum of abs(candidate residual) for each partition is stored */ 339 unsigned *raw_bits_per_partition; /* workspace where the sum of silog2(candidate residual) for each partition is stored */ 340 FLAC__BitWriter *frame; /* the current frame being worked on */ 341 unsigned loose_mid_side_stereo_frames; /* rounded number of frames the encoder will use before trying both independent and mid/side frames again */ 342 unsigned loose_mid_side_stereo_frame_count; /* number of frames using the current channel assignment */ 343 FLAC__ChannelAssignment last_channel_assignment; 344 FLAC__StreamMetadata streaminfo; /* scratchpad for STREAMINFO as it is built */ 345 FLAC__StreamMetadata_SeekTable *seek_table; /* pointer into encoder->protected_->metadata_ where the seek table is */ 346 unsigned current_sample_number; 347 unsigned current_frame_number; 348 FLAC__MD5Context md5context; 349 FLAC__CPUInfo cpuinfo; 350 void (*local_precompute_partition_info_sums)(const FLAC__int32 residual[], FLAC__uint64 abs_residual_partition_sums[], unsigned residual_samples, unsigned predictor_order, unsigned min_partition_order, unsigned max_partition_order, unsigned bps); 351#ifndef FLAC__INTEGER_ONLY_LIBRARY 352 unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 353 unsigned (*local_fixed_compute_best_predictor_wide)(const FLAC__int32 data[], unsigned data_len, FLAC__float residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 354#else 355 unsigned (*local_fixed_compute_best_predictor)(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 356 unsigned (*local_fixed_compute_best_predictor_wide)(const FLAC__int32 data[], unsigned data_len, FLAC__fixedpoint residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]); 357#endif 358#ifndef FLAC__INTEGER_ONLY_LIBRARY 359 void (*local_lpc_compute_autocorrelation)(const FLAC__real data[], unsigned data_len, unsigned lag, FLAC__real autoc[]); 360 void (*local_lpc_compute_residual_from_qlp_coefficients)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]); 361 void (*local_lpc_compute_residual_from_qlp_coefficients_64bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]); 362 void (*local_lpc_compute_residual_from_qlp_coefficients_16bit)(const FLAC__int32 *data, unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 residual[]); 363#endif 364 FLAC__bool use_wide_by_block; /* use slow 64-bit versions of some functions because of the block size */ 365 FLAC__bool use_wide_by_partition; /* use slow 64-bit versions of some functions because of the min partition order and blocksize */ 366 FLAC__bool use_wide_by_order; /* use slow 64-bit versions of some functions because of the lpc order */ 367 FLAC__bool disable_constant_subframes; 368 FLAC__bool disable_fixed_subframes; 369 FLAC__bool disable_verbatim_subframes; 370#if FLAC__HAS_OGG 371 FLAC__bool is_ogg; 372#endif 373 FLAC__StreamEncoderReadCallback read_callback; /* currently only needed for Ogg FLAC */ 374 FLAC__StreamEncoderSeekCallback seek_callback; 375 FLAC__StreamEncoderTellCallback tell_callback; 376 FLAC__StreamEncoderWriteCallback write_callback; 377 FLAC__StreamEncoderMetadataCallback metadata_callback; 378 FLAC__StreamEncoderProgressCallback progress_callback; 379 void *client_data; 380 unsigned first_seekpoint_to_check; 381 FILE *file; /* only used when encoding to a file */ 382 FLAC__uint64 bytes_written; 383 FLAC__uint64 samples_written; 384 unsigned frames_written; 385 unsigned total_frames_estimate; 386 /* unaligned (original) pointers to allocated data */ 387 FLAC__int32 *integer_signal_unaligned[FLAC__MAX_CHANNELS]; 388 FLAC__int32 *integer_signal_mid_side_unaligned[2]; 389#ifndef FLAC__INTEGER_ONLY_LIBRARY 390 FLAC__real *real_signal_unaligned[FLAC__MAX_CHANNELS]; /* (@@@ currently unused) */ 391 FLAC__real *real_signal_mid_side_unaligned[2]; /* (@@@ currently unused) */ 392 FLAC__real *window_unaligned[FLAC__MAX_APODIZATION_FUNCTIONS]; 393 FLAC__real *windowed_signal_unaligned; 394#endif 395 FLAC__int32 *residual_workspace_unaligned[FLAC__MAX_CHANNELS][2]; 396 FLAC__int32 *residual_workspace_mid_side_unaligned[2][2]; 397 FLAC__uint64 *abs_residual_partition_sums_unaligned; 398 unsigned *raw_bits_per_partition_unaligned; 399 /* 400 * These fields have been moved here from private function local 401 * declarations merely to save stack space during encoding. 402 */ 403#ifndef FLAC__INTEGER_ONLY_LIBRARY 404 FLAC__real lp_coeff[FLAC__MAX_LPC_ORDER][FLAC__MAX_LPC_ORDER]; /* from process_subframe_() */ 405#endif 406 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents_extra[2]; /* from find_best_partition_order_() */ 407 /* 408 * The data for the verify section 409 */ 410 struct { 411 FLAC__StreamDecoder *decoder; 412 EncoderStateHint state_hint; 413 FLAC__bool needs_magic_hack; 414 verify_input_fifo input_fifo; 415 verify_output output; 416 struct { 417 FLAC__uint64 absolute_sample; 418 unsigned frame_number; 419 unsigned channel; 420 unsigned sample; 421 FLAC__int32 expected; 422 FLAC__int32 got; 423 } error_stats; 424 } verify; 425 FLAC__bool is_being_deleted; /* if true, call to ..._finish() from ..._delete() will not call the callbacks */ 426} FLAC__StreamEncoderPrivate; 427 428/*********************************************************************** 429 * 430 * Public static class data 431 * 432 ***********************************************************************/ 433 434FLAC_API const char * const FLAC__StreamEncoderStateString[] = { 435 "FLAC__STREAM_ENCODER_OK", 436 "FLAC__STREAM_ENCODER_UNINITIALIZED", 437 "FLAC__STREAM_ENCODER_OGG_ERROR", 438 "FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR", 439 "FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA", 440 "FLAC__STREAM_ENCODER_CLIENT_ERROR", 441 "FLAC__STREAM_ENCODER_IO_ERROR", 442 "FLAC__STREAM_ENCODER_FRAMING_ERROR", 443 "FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR" 444}; 445 446FLAC_API const char * const FLAC__StreamEncoderInitStatusString[] = { 447 "FLAC__STREAM_ENCODER_INIT_STATUS_OK", 448 "FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR", 449 "FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER", 450 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS", 451 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS", 452 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE", 453 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE", 454 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE", 455 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER", 456 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION", 457 "FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER", 458 "FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE", 459 "FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA", 460 "FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED" 461}; 462 463FLAC_API const char * const FLAC__StreamEncoderReadStatusString[] = { 464 "FLAC__STREAM_ENCODER_READ_STATUS_CONTINUE", 465 "FLAC__STREAM_ENCODER_READ_STATUS_END_OF_STREAM", 466 "FLAC__STREAM_ENCODER_READ_STATUS_ABORT", 467 "FLAC__STREAM_ENCODER_READ_STATUS_UNSUPPORTED" 468}; 469 470FLAC_API const char * const FLAC__StreamEncoderWriteStatusString[] = { 471 "FLAC__STREAM_ENCODER_WRITE_STATUS_OK", 472 "FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR" 473}; 474 475FLAC_API const char * const FLAC__StreamEncoderSeekStatusString[] = { 476 "FLAC__STREAM_ENCODER_SEEK_STATUS_OK", 477 "FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR", 478 "FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED" 479}; 480 481FLAC_API const char * const FLAC__StreamEncoderTellStatusString[] = { 482 "FLAC__STREAM_ENCODER_TELL_STATUS_OK", 483 "FLAC__STREAM_ENCODER_TELL_STATUS_ERROR", 484 "FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED" 485}; 486 487/* Number of samples that will be overread to watch for end of stream. By 488 * 'overread', we mean that the FLAC__stream_encoder_process*() calls will 489 * always try to read blocksize+1 samples before encoding a block, so that 490 * even if the stream has a total sample count that is an integral multiple 491 * of the blocksize, we will still notice when we are encoding the last 492 * block. This is needed, for example, to correctly set the end-of-stream 493 * marker in Ogg FLAC. 494 * 495 * WATCHOUT: some parts of the code assert that OVERREAD_ == 1 and there's 496 * not really any reason to change it. 497 */ 498static const unsigned OVERREAD_ = 1; 499 500/*********************************************************************** 501 * 502 * Class constructor/destructor 503 * 504 */ 505FLAC_API FLAC__StreamEncoder *FLAC__stream_encoder_new(void) 506{ 507 FLAC__StreamEncoder *encoder; 508 unsigned i; 509 510 FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */ 511 512 encoder = calloc(1, sizeof(FLAC__StreamEncoder)); 513 if(encoder == 0) { 514 return 0; 515 } 516 517 encoder->protected_ = calloc(1, sizeof(FLAC__StreamEncoderProtected)); 518 if(encoder->protected_ == 0) { 519 free(encoder); 520 return 0; 521 } 522 523 encoder->private_ = calloc(1, sizeof(FLAC__StreamEncoderPrivate)); 524 if(encoder->private_ == 0) { 525 free(encoder->protected_); 526 free(encoder); 527 return 0; 528 } 529 530 encoder->private_->frame = FLAC__bitwriter_new(); 531 if(encoder->private_->frame == 0) { 532 free(encoder->private_); 533 free(encoder->protected_); 534 free(encoder); 535 return 0; 536 } 537 538 encoder->private_->file = 0; 539 540 set_defaults_(encoder); 541 542 encoder->private_->is_being_deleted = false; 543 544 for(i = 0; i < FLAC__MAX_CHANNELS; i++) { 545 encoder->private_->subframe_workspace_ptr[i][0] = &encoder->private_->subframe_workspace[i][0]; 546 encoder->private_->subframe_workspace_ptr[i][1] = &encoder->private_->subframe_workspace[i][1]; 547 } 548 for(i = 0; i < 2; i++) { 549 encoder->private_->subframe_workspace_ptr_mid_side[i][0] = &encoder->private_->subframe_workspace_mid_side[i][0]; 550 encoder->private_->subframe_workspace_ptr_mid_side[i][1] = &encoder->private_->subframe_workspace_mid_side[i][1]; 551 } 552 for(i = 0; i < FLAC__MAX_CHANNELS; i++) { 553 encoder->private_->partitioned_rice_contents_workspace_ptr[i][0] = &encoder->private_->partitioned_rice_contents_workspace[i][0]; 554 encoder->private_->partitioned_rice_contents_workspace_ptr[i][1] = &encoder->private_->partitioned_rice_contents_workspace[i][1]; 555 } 556 for(i = 0; i < 2; i++) { 557 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][0] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]; 558 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[i][1] = &encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]; 559 } 560 561 for(i = 0; i < FLAC__MAX_CHANNELS; i++) { 562 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][0]); 563 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace[i][1]); 564 } 565 for(i = 0; i < 2; i++) { 566 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]); 567 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]); 568 } 569 for(i = 0; i < 2; i++) 570 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&encoder->private_->partitioned_rice_contents_extra[i]); 571 572 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED; 573 574 return encoder; 575} 576 577FLAC_API void FLAC__stream_encoder_delete(FLAC__StreamEncoder *encoder) 578{ 579 unsigned i; 580 581 if (encoder == NULL) 582 return ; 583 584 FLAC__ASSERT(0 != encoder->protected_); 585 FLAC__ASSERT(0 != encoder->private_); 586 FLAC__ASSERT(0 != encoder->private_->frame); 587 588 encoder->private_->is_being_deleted = true; 589 590 (void)FLAC__stream_encoder_finish(encoder); 591 592 if(0 != encoder->private_->verify.decoder) 593 FLAC__stream_decoder_delete(encoder->private_->verify.decoder); 594 595 for(i = 0; i < FLAC__MAX_CHANNELS; i++) { 596 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][0]); 597 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace[i][1]); 598 } 599 for(i = 0; i < 2; i++) { 600 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][0]); 601 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_workspace_mid_side[i][1]); 602 } 603 for(i = 0; i < 2; i++) 604 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&encoder->private_->partitioned_rice_contents_extra[i]); 605 606 FLAC__bitwriter_delete(encoder->private_->frame); 607 free(encoder->private_); 608 free(encoder->protected_); 609 free(encoder); 610} 611 612/*********************************************************************** 613 * 614 * Public class methods 615 * 616 ***********************************************************************/ 617 618static FLAC__StreamEncoderInitStatus init_stream_internal_( 619 FLAC__StreamEncoder *encoder, 620 FLAC__StreamEncoderReadCallback read_callback, 621 FLAC__StreamEncoderWriteCallback write_callback, 622 FLAC__StreamEncoderSeekCallback seek_callback, 623 FLAC__StreamEncoderTellCallback tell_callback, 624 FLAC__StreamEncoderMetadataCallback metadata_callback, 625 void *client_data, 626 FLAC__bool is_ogg 627) 628{ 629 unsigned i; 630 FLAC__bool metadata_has_seektable, metadata_has_vorbis_comment, metadata_picture_has_type1, metadata_picture_has_type2; 631 632 FLAC__ASSERT(0 != encoder); 633 634 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 635 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED; 636 637#if !FLAC__HAS_OGG 638 if(is_ogg) 639 return FLAC__STREAM_ENCODER_INIT_STATUS_UNSUPPORTED_CONTAINER; 640#endif 641 642 if(0 == write_callback || (seek_callback && 0 == tell_callback)) 643 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_CALLBACKS; 644 645 if(encoder->protected_->channels == 0 || encoder->protected_->channels > FLAC__MAX_CHANNELS) 646 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_NUMBER_OF_CHANNELS; 647 648 if(encoder->protected_->channels != 2) { 649 encoder->protected_->do_mid_side_stereo = false; 650 encoder->protected_->loose_mid_side_stereo = false; 651 } 652 else if(!encoder->protected_->do_mid_side_stereo) 653 encoder->protected_->loose_mid_side_stereo = false; 654 655 if(encoder->protected_->bits_per_sample >= 32) 656 encoder->protected_->do_mid_side_stereo = false; /* since we currenty do 32-bit math, the side channel would have 33 bps and overflow */ 657 658 if(encoder->protected_->bits_per_sample < FLAC__MIN_BITS_PER_SAMPLE || encoder->protected_->bits_per_sample > FLAC__REFERENCE_CODEC_MAX_BITS_PER_SAMPLE) 659 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BITS_PER_SAMPLE; 660 661 if(!FLAC__format_sample_rate_is_valid(encoder->protected_->sample_rate)) 662 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_SAMPLE_RATE; 663 664 if(encoder->protected_->blocksize == 0) { 665 if(encoder->protected_->max_lpc_order == 0) 666 encoder->protected_->blocksize = 1152; 667 else 668 encoder->protected_->blocksize = 4096; 669 } 670 671 if(encoder->protected_->blocksize < FLAC__MIN_BLOCK_SIZE || encoder->protected_->blocksize > FLAC__MAX_BLOCK_SIZE) 672 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_BLOCK_SIZE; 673 674 if(encoder->protected_->max_lpc_order > FLAC__MAX_LPC_ORDER) 675 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_MAX_LPC_ORDER; 676 677 if(encoder->protected_->blocksize < encoder->protected_->max_lpc_order) 678 return FLAC__STREAM_ENCODER_INIT_STATUS_BLOCK_SIZE_TOO_SMALL_FOR_LPC_ORDER; 679 680 if(encoder->protected_->qlp_coeff_precision == 0) { 681 if(encoder->protected_->bits_per_sample < 16) { 682 /* @@@ need some data about how to set this here w.r.t. blocksize and sample rate */ 683 /* @@@ until then we'll make a guess */ 684 encoder->protected_->qlp_coeff_precision = flac_max(FLAC__MIN_QLP_COEFF_PRECISION, 2 + encoder->protected_->bits_per_sample / 2); 685 } 686 else if(encoder->protected_->bits_per_sample == 16) { 687 if(encoder->protected_->blocksize <= 192) 688 encoder->protected_->qlp_coeff_precision = 7; 689 else if(encoder->protected_->blocksize <= 384) 690 encoder->protected_->qlp_coeff_precision = 8; 691 else if(encoder->protected_->blocksize <= 576) 692 encoder->protected_->qlp_coeff_precision = 9; 693 else if(encoder->protected_->blocksize <= 1152) 694 encoder->protected_->qlp_coeff_precision = 10; 695 else if(encoder->protected_->blocksize <= 2304) 696 encoder->protected_->qlp_coeff_precision = 11; 697 else if(encoder->protected_->blocksize <= 4608) 698 encoder->protected_->qlp_coeff_precision = 12; 699 else 700 encoder->protected_->qlp_coeff_precision = 13; 701 } 702 else { 703 if(encoder->protected_->blocksize <= 384) 704 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-2; 705 else if(encoder->protected_->blocksize <= 1152) 706 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION-1; 707 else 708 encoder->protected_->qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION; 709 } 710 FLAC__ASSERT(encoder->protected_->qlp_coeff_precision <= FLAC__MAX_QLP_COEFF_PRECISION); 711 } 712 else if(encoder->protected_->qlp_coeff_precision < FLAC__MIN_QLP_COEFF_PRECISION || encoder->protected_->qlp_coeff_precision > FLAC__MAX_QLP_COEFF_PRECISION) 713 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_QLP_COEFF_PRECISION; 714 715 if(encoder->protected_->streamable_subset) { 716 if(!FLAC__format_blocksize_is_subset(encoder->protected_->blocksize, encoder->protected_->sample_rate)) 717 return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE; 718 if(!FLAC__format_sample_rate_is_subset(encoder->protected_->sample_rate)) 719 return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE; 720 if( 721 encoder->protected_->bits_per_sample != 8 && 722 encoder->protected_->bits_per_sample != 12 && 723 encoder->protected_->bits_per_sample != 16 && 724 encoder->protected_->bits_per_sample != 20 && 725 encoder->protected_->bits_per_sample != 24 726 ) 727 return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE; 728 if(encoder->protected_->max_residual_partition_order > FLAC__SUBSET_MAX_RICE_PARTITION_ORDER) 729 return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE; 730 if( 731 encoder->protected_->sample_rate <= 48000 && 732 ( 733 encoder->protected_->blocksize > FLAC__SUBSET_MAX_BLOCK_SIZE_48000HZ || 734 encoder->protected_->max_lpc_order > FLAC__SUBSET_MAX_LPC_ORDER_48000HZ 735 ) 736 ) { 737 return FLAC__STREAM_ENCODER_INIT_STATUS_NOT_STREAMABLE; 738 } 739 } 740 741 if(encoder->protected_->max_residual_partition_order >= (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN)) 742 encoder->protected_->max_residual_partition_order = (1u << FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN) - 1; 743 if(encoder->protected_->min_residual_partition_order >= encoder->protected_->max_residual_partition_order) 744 encoder->protected_->min_residual_partition_order = encoder->protected_->max_residual_partition_order; 745 746#if FLAC__HAS_OGG 747 /* reorder metadata if necessary to ensure that any VORBIS_COMMENT is the first, according to the mapping spec */ 748 if(is_ogg && 0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 1) { 749 unsigned i1; 750 for(i1 = 1; i1 < encoder->protected_->num_metadata_blocks; i1++) { 751 if(0 != encoder->protected_->metadata[i1] && encoder->protected_->metadata[i1]->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) { 752 FLAC__StreamMetadata *vc = encoder->protected_->metadata[i1]; 753 for( ; i1 > 0; i1--) 754 encoder->protected_->metadata[i1] = encoder->protected_->metadata[i1-1]; 755 encoder->protected_->metadata[0] = vc; 756 break; 757 } 758 } 759 } 760#endif 761 /* keep track of any SEEKTABLE block */ 762 if(0 != encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0) { 763 unsigned i2; 764 for(i2 = 0; i2 < encoder->protected_->num_metadata_blocks; i2++) { 765 if(0 != encoder->protected_->metadata[i2] && encoder->protected_->metadata[i2]->type == FLAC__METADATA_TYPE_SEEKTABLE) { 766 encoder->private_->seek_table = &encoder->protected_->metadata[i2]->data.seek_table; 767 break; /* take only the first one */ 768 } 769 } 770 } 771 772 /* validate metadata */ 773 if(0 == encoder->protected_->metadata && encoder->protected_->num_metadata_blocks > 0) 774 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 775 metadata_has_seektable = false; 776 metadata_has_vorbis_comment = false; 777 metadata_picture_has_type1 = false; 778 metadata_picture_has_type2 = false; 779 for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) { 780 const FLAC__StreamMetadata *m = encoder->protected_->metadata[i]; 781 if(m->type == FLAC__METADATA_TYPE_STREAMINFO) 782 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 783 else if(m->type == FLAC__METADATA_TYPE_SEEKTABLE) { 784 if(metadata_has_seektable) /* only one is allowed */ 785 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 786 metadata_has_seektable = true; 787 if(!FLAC__format_seektable_is_legal(&m->data.seek_table)) 788 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 789 } 790 else if(m->type == FLAC__METADATA_TYPE_VORBIS_COMMENT) { 791 if(metadata_has_vorbis_comment) /* only one is allowed */ 792 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 793 metadata_has_vorbis_comment = true; 794 } 795 else if(m->type == FLAC__METADATA_TYPE_CUESHEET) { 796 if(!FLAC__format_cuesheet_is_legal(&m->data.cue_sheet, m->data.cue_sheet.is_cd, /*violation=*/0)) 797 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 798 } 799 else if(m->type == FLAC__METADATA_TYPE_PICTURE) { 800 if(!FLAC__format_picture_is_legal(&m->data.picture, /*violation=*/0)) 801 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 802 if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD) { 803 if(metadata_picture_has_type1) /* there should only be 1 per stream */ 804 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 805 metadata_picture_has_type1 = true; 806 /* standard icon must be 32x32 pixel PNG */ 807 if( 808 m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON_STANDARD && 809 ( 810 (strcmp(m->data.picture.mime_type, "image/png") && strcmp(m->data.picture.mime_type, "-->")) || 811 m->data.picture.width != 32 || 812 m->data.picture.height != 32 813 ) 814 ) 815 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 816 } 817 else if(m->data.picture.type == FLAC__STREAM_METADATA_PICTURE_TYPE_FILE_ICON) { 818 if(metadata_picture_has_type2) /* there should only be 1 per stream */ 819 return FLAC__STREAM_ENCODER_INIT_STATUS_INVALID_METADATA; 820 metadata_picture_has_type2 = true; 821 } 822 } 823 } 824 825 encoder->private_->input_capacity = 0; 826 for(i = 0; i < encoder->protected_->channels; i++) { 827 encoder->private_->integer_signal_unaligned[i] = encoder->private_->integer_signal[i] = 0; 828#ifndef FLAC__INTEGER_ONLY_LIBRARY 829 encoder->private_->real_signal_unaligned[i] = encoder->private_->real_signal[i] = 0; 830#endif 831 } 832 for(i = 0; i < 2; i++) { 833 encoder->private_->integer_signal_mid_side_unaligned[i] = encoder->private_->integer_signal_mid_side[i] = 0; 834#ifndef FLAC__INTEGER_ONLY_LIBRARY 835 encoder->private_->real_signal_mid_side_unaligned[i] = encoder->private_->real_signal_mid_side[i] = 0; 836#endif 837 } 838#ifndef FLAC__INTEGER_ONLY_LIBRARY 839 for(i = 0; i < encoder->protected_->num_apodizations; i++) 840 encoder->private_->window_unaligned[i] = encoder->private_->window[i] = 0; 841 encoder->private_->windowed_signal_unaligned = encoder->private_->windowed_signal = 0; 842#endif 843 for(i = 0; i < encoder->protected_->channels; i++) { 844 encoder->private_->residual_workspace_unaligned[i][0] = encoder->private_->residual_workspace[i][0] = 0; 845 encoder->private_->residual_workspace_unaligned[i][1] = encoder->private_->residual_workspace[i][1] = 0; 846 encoder->private_->best_subframe[i] = 0; 847 } 848 for(i = 0; i < 2; i++) { 849 encoder->private_->residual_workspace_mid_side_unaligned[i][0] = encoder->private_->residual_workspace_mid_side[i][0] = 0; 850 encoder->private_->residual_workspace_mid_side_unaligned[i][1] = encoder->private_->residual_workspace_mid_side[i][1] = 0; 851 encoder->private_->best_subframe_mid_side[i] = 0; 852 } 853 encoder->private_->abs_residual_partition_sums_unaligned = encoder->private_->abs_residual_partition_sums = 0; 854 encoder->private_->raw_bits_per_partition_unaligned = encoder->private_->raw_bits_per_partition = 0; 855#ifndef FLAC__INTEGER_ONLY_LIBRARY 856 encoder->private_->loose_mid_side_stereo_frames = (unsigned)((FLAC__double)encoder->protected_->sample_rate * 0.4 / (FLAC__double)encoder->protected_->blocksize + 0.5); 857#else 858 /* 26214 is the approximate fixed-point equivalent to 0.4 (0.4 * 2^16) */ 859 /* sample rate can be up to 655350 Hz, and thus use 20 bits, so we do the multiply÷ by hand */ 860 FLAC__ASSERT(FLAC__MAX_SAMPLE_RATE <= 655350); 861 FLAC__ASSERT(FLAC__MAX_BLOCK_SIZE <= 65535); 862 FLAC__ASSERT(encoder->protected_->sample_rate <= 655350); 863 FLAC__ASSERT(encoder->protected_->blocksize <= 65535); 864 encoder->private_->loose_mid_side_stereo_frames = (unsigned)FLAC__fixedpoint_trunc((((FLAC__uint64)(encoder->protected_->sample_rate) * (FLAC__uint64)(26214)) << 16) / (encoder->protected_->blocksize<<16) + FLAC__FP_ONE_HALF); 865#endif 866 if(encoder->private_->loose_mid_side_stereo_frames == 0) 867 encoder->private_->loose_mid_side_stereo_frames = 1; 868 encoder->private_->loose_mid_side_stereo_frame_count = 0; 869 encoder->private_->current_sample_number = 0; 870 encoder->private_->current_frame_number = 0; 871 872 encoder->private_->use_wide_by_block = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(encoder->protected_->blocksize)+1 > 30); 873 encoder->private_->use_wide_by_order = (encoder->protected_->bits_per_sample + FLAC__bitmath_ilog2(flac_max(encoder->protected_->max_lpc_order, FLAC__MAX_FIXED_ORDER))+1 > 30); /*@@@ need to use this? */ 874 encoder->private_->use_wide_by_partition = (false); /*@@@ need to set this */ 875 876 /* 877 * get the CPU info and set the function pointers 878 */ 879 FLAC__cpu_info(&encoder->private_->cpuinfo); 880 /* first default to the non-asm routines */ 881#ifndef FLAC__INTEGER_ONLY_LIBRARY 882 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation; 883#endif 884 encoder->private_->local_precompute_partition_info_sums = precompute_partition_info_sums_; 885 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor; 886 encoder->private_->local_fixed_compute_best_predictor_wide = FLAC__fixed_compute_best_predictor_wide; 887#ifndef FLAC__INTEGER_ONLY_LIBRARY 888 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients; 889 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide; 890 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients; 891#endif 892 /* now override with asm where appropriate */ 893#ifndef FLAC__INTEGER_ONLY_LIBRARY 894# ifndef FLAC__NO_ASM 895 if(encoder->private_->cpuinfo.use_asm) { 896# ifdef FLAC__CPU_IA32 897 FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32); 898# ifdef FLAC__HAS_NASM 899 if(encoder->private_->cpuinfo.ia32.sse) { 900 if(encoder->protected_->max_lpc_order < 4) 901 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_4_old; 902 else if(encoder->protected_->max_lpc_order < 8) 903 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_8_old; 904 else if(encoder->protected_->max_lpc_order < 12) 905 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_12_old; 906 else if(encoder->protected_->max_lpc_order < 16) 907 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32_sse_lag_16_old; 908 else 909 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32; 910 } 911 else 912 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_asm_ia32; 913 914 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide_asm_ia32; /* OPT_IA32: was really necessary for GCC < 4.9 */ 915 if(encoder->private_->cpuinfo.ia32.mmx) { 916 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32; 917 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx; 918 } 919 else { 920 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32; 921 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32; 922 } 923 924 if(encoder->private_->cpuinfo.ia32.mmx && encoder->private_->cpuinfo.ia32.cmov) 925 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_asm_ia32_mmx_cmov; 926# endif /* FLAC__HAS_NASM */ 927# ifdef FLAC__HAS_X86INTRIN 928# if defined FLAC__SSE_SUPPORTED 929 if(encoder->private_->cpuinfo.ia32.sse) { 930 if(encoder->private_->cpuinfo.ia32.sse42 || !encoder->private_->cpuinfo.ia32.intel) { /* use new autocorrelation functions */ 931 if(encoder->protected_->max_lpc_order < 4) 932 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_4_new; 933 else if(encoder->protected_->max_lpc_order < 8) 934 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_8_new; 935 else if(encoder->protected_->max_lpc_order < 12) 936 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_12_new; 937 else if(encoder->protected_->max_lpc_order < 16) 938 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16_new; 939 else 940 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation; 941 } 942 else { /* use old autocorrelation functions */ 943 if(encoder->protected_->max_lpc_order < 4) 944 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_4_old; 945 else if(encoder->protected_->max_lpc_order < 8) 946 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_8_old; 947 else if(encoder->protected_->max_lpc_order < 12) 948 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_12_old; 949 else if(encoder->protected_->max_lpc_order < 16) 950 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16_old; 951 else 952 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation; 953 } 954 } 955# endif 956 957# ifdef FLAC__SSE2_SUPPORTED 958 if(encoder->private_->cpuinfo.ia32.sse2) { 959 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse2; 960 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_sse2; 961 } 962# endif 963# ifdef FLAC__SSE4_1_SUPPORTED 964 if(encoder->private_->cpuinfo.ia32.sse41) { 965 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse41; 966 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide_intrin_sse41; 967 } 968# endif 969# ifdef FLAC__AVX2_SUPPORTED 970 if(encoder->private_->cpuinfo.ia32.avx2) { 971 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_avx2; 972 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_avx2; 973 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide_intrin_avx2; 974 } 975# endif 976 977# ifdef FLAC__SSE2_SUPPORTED 978 if (encoder->private_->cpuinfo.ia32.sse2) { 979 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_intrin_sse2; 980 encoder->private_->local_fixed_compute_best_predictor_wide = FLAC__fixed_compute_best_predictor_wide_intrin_sse2; 981 } 982# endif 983# ifdef FLAC__SSSE3_SUPPORTED 984 if (encoder->private_->cpuinfo.ia32.ssse3) { 985 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_intrin_ssse3; 986 encoder->private_->local_fixed_compute_best_predictor_wide = FLAC__fixed_compute_best_predictor_wide_intrin_ssse3; 987 } 988# endif 989# endif /* FLAC__HAS_X86INTRIN */ 990# elif defined FLAC__CPU_X86_64 991 FLAC__ASSERT(encoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_X86_64); 992# ifdef FLAC__HAS_X86INTRIN 993# ifdef FLAC__SSE_SUPPORTED 994 if(encoder->private_->cpuinfo.x86.sse42 || !encoder->private_->cpuinfo.x86.intel) { /* use new autocorrelation functions */ 995 if(encoder->protected_->max_lpc_order < 4) 996 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_4_new; 997 else if(encoder->protected_->max_lpc_order < 8) 998 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_8_new; 999 else if(encoder->protected_->max_lpc_order < 12) 1000 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_12_new; 1001 else if(encoder->protected_->max_lpc_order < 16) 1002 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16_new; 1003 } 1004 else { 1005 if(encoder->protected_->max_lpc_order < 4) 1006 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_4_old; 1007 else if(encoder->protected_->max_lpc_order < 8) 1008 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_8_old; 1009 else if(encoder->protected_->max_lpc_order < 12) 1010 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_12_old; 1011 else if(encoder->protected_->max_lpc_order < 16) 1012 encoder->private_->local_lpc_compute_autocorrelation = FLAC__lpc_compute_autocorrelation_intrin_sse_lag_16_old; 1013 } 1014# endif 1015 1016# ifdef FLAC__SSE2_SUPPORTED 1017 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_sse2; 1018# endif 1019# ifdef FLAC__SSE4_1_SUPPORTED 1020 if(encoder->private_->cpuinfo.x86.sse41) { 1021 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_sse41; 1022 } 1023# endif 1024# ifdef FLAC__AVX2_SUPPORTED 1025 if(encoder->private_->cpuinfo.x86.avx2) { 1026 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit = FLAC__lpc_compute_residual_from_qlp_coefficients_16_intrin_avx2; 1027 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients = FLAC__lpc_compute_residual_from_qlp_coefficients_intrin_avx2; 1028 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit = FLAC__lpc_compute_residual_from_qlp_coefficients_wide_intrin_avx2; 1029 } 1030# endif 1031 1032# ifdef FLAC__SSE2_SUPPORTED 1033 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_intrin_sse2; 1034 encoder->private_->local_fixed_compute_best_predictor_wide = FLAC__fixed_compute_best_predictor_wide_intrin_sse2; 1035# endif 1036# ifdef FLAC__SSSE3_SUPPORTED 1037 if (encoder->private_->cpuinfo.x86.ssse3) { 1038 encoder->private_->local_fixed_compute_best_predictor = FLAC__fixed_compute_best_predictor_intrin_ssse3; 1039 encoder->private_->local_fixed_compute_best_predictor_wide = FLAC__fixed_compute_best_predictor_wide_intrin_ssse3; 1040 } 1041# endif 1042# endif /* FLAC__HAS_X86INTRIN */ 1043# endif /* FLAC__CPU_... */ 1044 } 1045# endif /* !FLAC__NO_ASM */ 1046#endif /* !FLAC__INTEGER_ONLY_LIBRARY */ 1047#if !defined FLAC__NO_ASM && defined FLAC__HAS_X86INTRIN 1048 if(encoder->private_->cpuinfo.use_asm) { 1049# if defined FLAC__CPU_IA32 1050# ifdef FLAC__SSE2_SUPPORTED 1051 if(encoder->private_->cpuinfo.ia32.sse2) 1052 encoder->private_->local_precompute_partition_info_sums = FLAC__precompute_partition_info_sums_intrin_sse2; 1053# endif 1054# ifdef FLAC__SSSE3_SUPPORTED 1055 if(encoder->private_->cpuinfo.ia32.ssse3) 1056 encoder->private_->local_precompute_partition_info_sums = FLAC__precompute_partition_info_sums_intrin_ssse3; 1057# endif 1058# ifdef FLAC__AVX2_SUPPORTED 1059 if(encoder->private_->cpuinfo.ia32.avx2) 1060 encoder->private_->local_precompute_partition_info_sums = FLAC__precompute_partition_info_sums_intrin_avx2; 1061# endif 1062# elif defined FLAC__CPU_X86_64 1063# ifdef FLAC__SSE2_SUPPORTED 1064 encoder->private_->local_precompute_partition_info_sums = FLAC__precompute_partition_info_sums_intrin_sse2; 1065# endif 1066# ifdef FLAC__SSSE3_SUPPORTED 1067 if(encoder->private_->cpuinfo.x86.ssse3) 1068 encoder->private_->local_precompute_partition_info_sums = FLAC__precompute_partition_info_sums_intrin_ssse3; 1069# endif 1070# ifdef FLAC__AVX2_SUPPORTED 1071 if(encoder->private_->cpuinfo.x86.avx2) 1072 encoder->private_->local_precompute_partition_info_sums = FLAC__precompute_partition_info_sums_intrin_avx2; 1073# endif 1074# endif /* FLAC__CPU_... */ 1075 } 1076#endif /* !FLAC__NO_ASM && FLAC__HAS_X86INTRIN */ 1077 /* finally override based on wide-ness if necessary */ 1078 if(encoder->private_->use_wide_by_block) { 1079 encoder->private_->local_fixed_compute_best_predictor = encoder->private_->local_fixed_compute_best_predictor_wide; 1080 } 1081 1082 /* set state to OK; from here on, errors are fatal and we'll override the state then */ 1083 encoder->protected_->state = FLAC__STREAM_ENCODER_OK; 1084 1085#if FLAC__HAS_OGG 1086 encoder->private_->is_ogg = is_ogg; 1087 if(is_ogg && !FLAC__ogg_encoder_aspect_init(&encoder->protected_->ogg_encoder_aspect)) { 1088 encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR; 1089 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1090 } 1091#endif 1092 1093 encoder->private_->read_callback = read_callback; 1094 encoder->private_->write_callback = write_callback; 1095 encoder->private_->seek_callback = seek_callback; 1096 encoder->private_->tell_callback = tell_callback; 1097 encoder->private_->metadata_callback = metadata_callback; 1098 encoder->private_->client_data = client_data; 1099 1100 if(!resize_buffers_(encoder, encoder->protected_->blocksize)) { 1101 /* the above function sets the state for us in case of an error */ 1102 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1103 } 1104 1105 if(!FLAC__bitwriter_init(encoder->private_->frame)) { 1106 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; 1107 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1108 } 1109 1110 /* 1111 * Set up the verify stuff if necessary 1112 */ 1113 if(encoder->protected_->verify) { 1114 /* 1115 * First, set up the fifo which will hold the 1116 * original signal to compare against 1117 */ 1118 encoder->private_->verify.input_fifo.size = encoder->protected_->blocksize+OVERREAD_; 1119 for(i = 0; i < encoder->protected_->channels; i++) { 1120 if(0 == (encoder->private_->verify.input_fifo.data[i] = safe_malloc_mul_2op_p(sizeof(FLAC__int32), /*times*/encoder->private_->verify.input_fifo.size))) { 1121 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; 1122 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1123 } 1124 } 1125 encoder->private_->verify.input_fifo.tail = 0; 1126 1127 /* 1128 * Now set up a stream decoder for verification 1129 */ 1130 if(0 == encoder->private_->verify.decoder) { 1131 encoder->private_->verify.decoder = FLAC__stream_decoder_new(); 1132 if(0 == encoder->private_->verify.decoder) { 1133 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; 1134 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1135 } 1136 } 1137 1138 if(FLAC__stream_decoder_init_stream(encoder->private_->verify.decoder, verify_read_callback_, /*seek_callback=*/0, /*tell_callback=*/0, /*length_callback=*/0, /*eof_callback=*/0, verify_write_callback_, verify_metadata_callback_, verify_error_callback_, /*client_data=*/encoder) != FLAC__STREAM_DECODER_INIT_STATUS_OK) { 1139 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; 1140 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1141 } 1142 } 1143 encoder->private_->verify.error_stats.absolute_sample = 0; 1144 encoder->private_->verify.error_stats.frame_number = 0; 1145 encoder->private_->verify.error_stats.channel = 0; 1146 encoder->private_->verify.error_stats.sample = 0; 1147 encoder->private_->verify.error_stats.expected = 0; 1148 encoder->private_->verify.error_stats.got = 0; 1149 1150 /* 1151 * These must be done before we write any metadata, because that 1152 * calls the write_callback, which uses these values. 1153 */ 1154 encoder->private_->first_seekpoint_to_check = 0; 1155 encoder->private_->samples_written = 0; 1156 encoder->protected_->streaminfo_offset = 0; 1157 encoder->protected_->seektable_offset = 0; 1158 encoder->protected_->audio_offset = 0; 1159 1160 /* 1161 * write the stream header 1162 */ 1163 if(encoder->protected_->verify) 1164 encoder->private_->verify.state_hint = ENCODER_IN_MAGIC; 1165 if(!FLAC__bitwriter_write_raw_uint32(encoder->private_->frame, FLAC__STREAM_SYNC, FLAC__STREAM_SYNC_LEN)) { 1166 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 1167 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1168 } 1169 if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) { 1170 /* the above function sets the state for us in case of an error */ 1171 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1172 } 1173 1174 /* 1175 * write the STREAMINFO metadata block 1176 */ 1177 if(encoder->protected_->verify) 1178 encoder->private_->verify.state_hint = ENCODER_IN_METADATA; 1179 encoder->private_->streaminfo.type = FLAC__METADATA_TYPE_STREAMINFO; 1180 encoder->private_->streaminfo.is_last = false; /* we will have at a minimum a VORBIS_COMMENT afterwards */ 1181 encoder->private_->streaminfo.length = FLAC__STREAM_METADATA_STREAMINFO_LENGTH; 1182 encoder->private_->streaminfo.data.stream_info.min_blocksize = encoder->protected_->blocksize; /* this encoder uses the same blocksize for the whole stream */ 1183 encoder->private_->streaminfo.data.stream_info.max_blocksize = encoder->protected_->blocksize; 1184 encoder->private_->streaminfo.data.stream_info.min_framesize = 0; /* we don't know this yet; have to fill it in later */ 1185 encoder->private_->streaminfo.data.stream_info.max_framesize = 0; /* we don't know this yet; have to fill it in later */ 1186 encoder->private_->streaminfo.data.stream_info.sample_rate = encoder->protected_->sample_rate; 1187 encoder->private_->streaminfo.data.stream_info.channels = encoder->protected_->channels; 1188 encoder->private_->streaminfo.data.stream_info.bits_per_sample = encoder->protected_->bits_per_sample; 1189 encoder->private_->streaminfo.data.stream_info.total_samples = encoder->protected_->total_samples_estimate; /* we will replace this later with the real total */ 1190 memset(encoder->private_->streaminfo.data.stream_info.md5sum, 0, 16); /* we don't know this yet; have to fill it in later */ 1191 if(encoder->protected_->do_md5) 1192 FLAC__MD5Init(&encoder->private_->md5context); 1193 if(!FLAC__add_metadata_block(&encoder->private_->streaminfo, encoder->private_->frame)) { 1194 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 1195 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1196 } 1197 if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) { 1198 /* the above function sets the state for us in case of an error */ 1199 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1200 } 1201 1202 /* 1203 * Now that the STREAMINFO block is written, we can init this to an 1204 * absurdly-high value... 1205 */ 1206 encoder->private_->streaminfo.data.stream_info.min_framesize = (1u << FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN) - 1; 1207 /* ... and clear this to 0 */ 1208 encoder->private_->streaminfo.data.stream_info.total_samples = 0; 1209 1210 /* 1211 * Check to see if the supplied metadata contains a VORBIS_COMMENT; 1212 * if not, we will write an empty one (FLAC__add_metadata_block() 1213 * automatically supplies the vendor string). 1214 * 1215 * WATCHOUT: the Ogg FLAC mapping requires us to write this block after 1216 * the STREAMINFO. (In the case that metadata_has_vorbis_comment is 1217 * true it will have already insured that the metadata list is properly 1218 * ordered.) 1219 */ 1220 if(!metadata_has_vorbis_comment) { 1221 FLAC__StreamMetadata vorbis_comment; 1222 vorbis_comment.type = FLAC__METADATA_TYPE_VORBIS_COMMENT; 1223 vorbis_comment.is_last = (encoder->protected_->num_metadata_blocks == 0); 1224 vorbis_comment.length = 4 + 4; /* MAGIC NUMBER */ 1225 vorbis_comment.data.vorbis_comment.vendor_string.length = 0; 1226 vorbis_comment.data.vorbis_comment.vendor_string.entry = 0; 1227 vorbis_comment.data.vorbis_comment.num_comments = 0; 1228 vorbis_comment.data.vorbis_comment.comments = 0; 1229 if(!FLAC__add_metadata_block(&vorbis_comment, encoder->private_->frame)) { 1230 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 1231 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1232 } 1233 if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) { 1234 /* the above function sets the state for us in case of an error */ 1235 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1236 } 1237 } 1238 1239 /* 1240 * write the user's metadata blocks 1241 */ 1242 for(i = 0; i < encoder->protected_->num_metadata_blocks; i++) { 1243 encoder->protected_->metadata[i]->is_last = (i == encoder->protected_->num_metadata_blocks - 1); 1244 if(!FLAC__add_metadata_block(encoder->protected_->metadata[i], encoder->private_->frame)) { 1245 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 1246 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1247 } 1248 if(!write_bitbuffer_(encoder, 0, /*is_last_block=*/false)) { 1249 /* the above function sets the state for us in case of an error */ 1250 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1251 } 1252 } 1253 1254 /* now that all the metadata is written, we save the stream offset */ 1255 if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &encoder->protected_->audio_offset, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) { /* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */ 1256 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 1257 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1258 } 1259 1260 if(encoder->protected_->verify) 1261 encoder->private_->verify.state_hint = ENCODER_IN_AUDIO; 1262 1263 return FLAC__STREAM_ENCODER_INIT_STATUS_OK; 1264} 1265 1266FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_stream( 1267 FLAC__StreamEncoder *encoder, 1268 FLAC__StreamEncoderWriteCallback write_callback, 1269 FLAC__StreamEncoderSeekCallback seek_callback, 1270 FLAC__StreamEncoderTellCallback tell_callback, 1271 FLAC__StreamEncoderMetadataCallback metadata_callback, 1272 void *client_data 1273) 1274{ 1275 return init_stream_internal_( 1276 encoder, 1277 /*read_callback=*/0, 1278 write_callback, 1279 seek_callback, 1280 tell_callback, 1281 metadata_callback, 1282 client_data, 1283 /*is_ogg=*/false 1284 ); 1285} 1286 1287FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_stream( 1288 FLAC__StreamEncoder *encoder, 1289 FLAC__StreamEncoderReadCallback read_callback, 1290 FLAC__StreamEncoderWriteCallback write_callback, 1291 FLAC__StreamEncoderSeekCallback seek_callback, 1292 FLAC__StreamEncoderTellCallback tell_callback, 1293 FLAC__StreamEncoderMetadataCallback metadata_callback, 1294 void *client_data 1295) 1296{ 1297 return init_stream_internal_( 1298 encoder, 1299 read_callback, 1300 write_callback, 1301 seek_callback, 1302 tell_callback, 1303 metadata_callback, 1304 client_data, 1305 /*is_ogg=*/true 1306 ); 1307} 1308 1309static FLAC__StreamEncoderInitStatus init_FILE_internal_( 1310 FLAC__StreamEncoder *encoder, 1311 FILE *file, 1312 FLAC__StreamEncoderProgressCallback progress_callback, 1313 void *client_data, 1314 FLAC__bool is_ogg 1315) 1316{ 1317 FLAC__StreamEncoderInitStatus init_status; 1318 1319 FLAC__ASSERT(0 != encoder); 1320 FLAC__ASSERT(0 != file); 1321 1322 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1323 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED; 1324 1325 /* double protection */ 1326 if(file == 0) { 1327 encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR; 1328 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1329 } 1330 1331 /* 1332 * To make sure that our file does not go unclosed after an error, we 1333 * must assign the FILE pointer before any further error can occur in 1334 * this routine. 1335 */ 1336 if(file == stdout) 1337 file = get_binary_stdout_(); /* just to be safe */ 1338 1339#ifdef _WIN32 1340 /* 1341 * Windows can suffer quite badly from disk fragmentation. This can be 1342 * reduced significantly by setting the output buffer size to be 10MB. 1343 */ 1344 setvbuf(file, NULL, _IOFBF, 10*1024*1024); 1345#endif 1346 encoder->private_->file = file; 1347 1348 encoder->private_->progress_callback = progress_callback; 1349 encoder->private_->bytes_written = 0; 1350 encoder->private_->samples_written = 0; 1351 encoder->private_->frames_written = 0; 1352 1353 init_status = init_stream_internal_( 1354 encoder, 1355 encoder->private_->file == stdout? 0 : is_ogg? file_read_callback_ : 0, 1356 file_write_callback_, 1357 encoder->private_->file == stdout? 0 : file_seek_callback_, 1358 encoder->private_->file == stdout? 0 : file_tell_callback_, 1359 /*metadata_callback=*/0, 1360 client_data, 1361 is_ogg 1362 ); 1363 if(init_status != FLAC__STREAM_ENCODER_INIT_STATUS_OK) { 1364 /* the above function sets the state for us in case of an error */ 1365 return init_status; 1366 } 1367 1368 { 1369 unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder); 1370 1371 FLAC__ASSERT(blocksize != 0); 1372 encoder->private_->total_frames_estimate = (unsigned)((FLAC__stream_encoder_get_total_samples_estimate(encoder) + blocksize - 1) / blocksize); 1373 } 1374 1375 return init_status; 1376} 1377 1378FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_FILE( 1379 FLAC__StreamEncoder *encoder, 1380 FILE *file, 1381 FLAC__StreamEncoderProgressCallback progress_callback, 1382 void *client_data 1383) 1384{ 1385 return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/false); 1386} 1387 1388FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_FILE( 1389 FLAC__StreamEncoder *encoder, 1390 FILE *file, 1391 FLAC__StreamEncoderProgressCallback progress_callback, 1392 void *client_data 1393) 1394{ 1395 return init_FILE_internal_(encoder, file, progress_callback, client_data, /*is_ogg=*/true); 1396} 1397 1398static FLAC__StreamEncoderInitStatus init_file_internal_( 1399 FLAC__StreamEncoder *encoder, 1400 const char *filename, 1401 FLAC__StreamEncoderProgressCallback progress_callback, 1402 void *client_data, 1403 FLAC__bool is_ogg 1404) 1405{ 1406 FILE *file; 1407 1408 FLAC__ASSERT(0 != encoder); 1409 1410 /* 1411 * To make sure that our file does not go unclosed after an error, we 1412 * have to do the same entrance checks here that are later performed 1413 * in FLAC__stream_encoder_init_FILE() before the FILE* is assigned. 1414 */ 1415 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1416 return FLAC__STREAM_ENCODER_INIT_STATUS_ALREADY_INITIALIZED; 1417 1418 file = filename? flac_fopen(filename, "w+b") : stdout; 1419 1420 if(file == 0) { 1421 encoder->protected_->state = FLAC__STREAM_ENCODER_IO_ERROR; 1422 return FLAC__STREAM_ENCODER_INIT_STATUS_ENCODER_ERROR; 1423 } 1424 1425 return init_FILE_internal_(encoder, file, progress_callback, client_data, is_ogg); 1426} 1427 1428FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_file( 1429 FLAC__StreamEncoder *encoder, 1430 const char *filename, 1431 FLAC__StreamEncoderProgressCallback progress_callback, 1432 void *client_data 1433) 1434{ 1435 return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/false); 1436} 1437 1438FLAC_API FLAC__StreamEncoderInitStatus FLAC__stream_encoder_init_ogg_file( 1439 FLAC__StreamEncoder *encoder, 1440 const char *filename, 1441 FLAC__StreamEncoderProgressCallback progress_callback, 1442 void *client_data 1443) 1444{ 1445 return init_file_internal_(encoder, filename, progress_callback, client_data, /*is_ogg=*/true); 1446} 1447 1448FLAC_API FLAC__bool FLAC__stream_encoder_finish(FLAC__StreamEncoder *encoder) 1449{ 1450 FLAC__bool error = false; 1451 1452 FLAC__ASSERT(0 != encoder); 1453 FLAC__ASSERT(0 != encoder->private_); 1454 FLAC__ASSERT(0 != encoder->protected_); 1455 1456 if(encoder->protected_->state == FLAC__STREAM_ENCODER_UNINITIALIZED) 1457 return true; 1458 1459 if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK && !encoder->private_->is_being_deleted) { 1460 if(encoder->private_->current_sample_number != 0) { 1461 const FLAC__bool is_fractional_block = encoder->protected_->blocksize != encoder->private_->current_sample_number; 1462 encoder->protected_->blocksize = encoder->private_->current_sample_number; 1463 if(!process_frame_(encoder, is_fractional_block, /*is_last_block=*/true)) 1464 error = true; 1465 } 1466 } 1467 1468 if(encoder->protected_->do_md5) 1469 FLAC__MD5Final(encoder->private_->streaminfo.data.stream_info.md5sum, &encoder->private_->md5context); 1470 1471 if(!encoder->private_->is_being_deleted) { 1472 if(encoder->protected_->state == FLAC__STREAM_ENCODER_OK) { 1473 if(encoder->private_->seek_callback) { 1474#if FLAC__HAS_OGG 1475 if(encoder->private_->is_ogg) 1476 update_ogg_metadata_(encoder); 1477 else 1478#endif 1479 update_metadata_(encoder); 1480 1481 /* check if an error occurred while updating metadata */ 1482 if(encoder->protected_->state != FLAC__STREAM_ENCODER_OK) 1483 error = true; 1484 } 1485 if(encoder->private_->metadata_callback) 1486 encoder->private_->metadata_callback(encoder, &encoder->private_->streaminfo, encoder->private_->client_data); 1487 } 1488 1489 if(encoder->protected_->verify && 0 != encoder->private_->verify.decoder && !FLAC__stream_decoder_finish(encoder->private_->verify.decoder)) { 1490 if(!error) 1491 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA; 1492 error = true; 1493 } 1494 } 1495 1496 if(0 != encoder->private_->file) { 1497 if(encoder->private_->file != stdout) 1498 fclose(encoder->private_->file); 1499 encoder->private_->file = 0; 1500 } 1501 1502#if FLAC__HAS_OGG 1503 if(encoder->private_->is_ogg) 1504 FLAC__ogg_encoder_aspect_finish(&encoder->protected_->ogg_encoder_aspect); 1505#endif 1506 1507 free_(encoder); 1508 set_defaults_(encoder); 1509 1510 if(!error) 1511 encoder->protected_->state = FLAC__STREAM_ENCODER_UNINITIALIZED; 1512 1513 return !error; 1514} 1515 1516FLAC_API FLAC__bool FLAC__stream_encoder_set_ogg_serial_number(FLAC__StreamEncoder *encoder, long value) 1517{ 1518 FLAC__ASSERT(0 != encoder); 1519 FLAC__ASSERT(0 != encoder->private_); 1520 FLAC__ASSERT(0 != encoder->protected_); 1521 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1522 return false; 1523#if FLAC__HAS_OGG 1524 /* can't check encoder->private_->is_ogg since that's not set until init time */ 1525 FLAC__ogg_encoder_aspect_set_serial_number(&encoder->protected_->ogg_encoder_aspect, value); 1526 return true; 1527#else 1528 (void)value; 1529 return false; 1530#endif 1531} 1532 1533FLAC_API FLAC__bool FLAC__stream_encoder_set_verify(FLAC__StreamEncoder *encoder, FLAC__bool value) 1534{ 1535 FLAC__ASSERT(0 != encoder); 1536 FLAC__ASSERT(0 != encoder->private_); 1537 FLAC__ASSERT(0 != encoder->protected_); 1538 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1539 return false; 1540#ifndef FLAC__MANDATORY_VERIFY_WHILE_ENCODING 1541 encoder->protected_->verify = value; 1542#endif 1543 return true; 1544} 1545 1546FLAC_API FLAC__bool FLAC__stream_encoder_set_streamable_subset(FLAC__StreamEncoder *encoder, FLAC__bool value) 1547{ 1548 FLAC__ASSERT(0 != encoder); 1549 FLAC__ASSERT(0 != encoder->private_); 1550 FLAC__ASSERT(0 != encoder->protected_); 1551 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1552 return false; 1553 encoder->protected_->streamable_subset = value; 1554 return true; 1555} 1556 1557FLAC_API FLAC__bool FLAC__stream_encoder_set_do_md5(FLAC__StreamEncoder *encoder, FLAC__bool value) 1558{ 1559 FLAC__ASSERT(0 != encoder); 1560 FLAC__ASSERT(0 != encoder->private_); 1561 FLAC__ASSERT(0 != encoder->protected_); 1562 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1563 return false; 1564 encoder->protected_->do_md5 = value; 1565 return true; 1566} 1567 1568FLAC_API FLAC__bool FLAC__stream_encoder_set_channels(FLAC__StreamEncoder *encoder, unsigned value) 1569{ 1570 FLAC__ASSERT(0 != encoder); 1571 FLAC__ASSERT(0 != encoder->private_); 1572 FLAC__ASSERT(0 != encoder->protected_); 1573 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1574 return false; 1575 encoder->protected_->channels = value; 1576 return true; 1577} 1578 1579FLAC_API FLAC__bool FLAC__stream_encoder_set_bits_per_sample(FLAC__StreamEncoder *encoder, unsigned value) 1580{ 1581 FLAC__ASSERT(0 != encoder); 1582 FLAC__ASSERT(0 != encoder->private_); 1583 FLAC__ASSERT(0 != encoder->protected_); 1584 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1585 return false; 1586 encoder->protected_->bits_per_sample = value; 1587 return true; 1588} 1589 1590FLAC_API FLAC__bool FLAC__stream_encoder_set_sample_rate(FLAC__StreamEncoder *encoder, unsigned value) 1591{ 1592 FLAC__ASSERT(0 != encoder); 1593 FLAC__ASSERT(0 != encoder->private_); 1594 FLAC__ASSERT(0 != encoder->protected_); 1595 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1596 return false; 1597 encoder->protected_->sample_rate = value; 1598 return true; 1599} 1600 1601FLAC_API FLAC__bool FLAC__stream_encoder_set_compression_level(FLAC__StreamEncoder *encoder, unsigned value) 1602{ 1603 FLAC__bool ok = true; 1604 FLAC__ASSERT(0 != encoder); 1605 FLAC__ASSERT(0 != encoder->private_); 1606 FLAC__ASSERT(0 != encoder->protected_); 1607 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1608 return false; 1609 if(value >= sizeof(compression_levels_)/sizeof(compression_levels_[0])) 1610 value = sizeof(compression_levels_)/sizeof(compression_levels_[0]) - 1; 1611 ok &= FLAC__stream_encoder_set_do_mid_side_stereo (encoder, compression_levels_[value].do_mid_side_stereo); 1612 ok &= FLAC__stream_encoder_set_loose_mid_side_stereo (encoder, compression_levels_[value].loose_mid_side_stereo); 1613#ifndef FLAC__INTEGER_ONLY_LIBRARY 1614#if 1 1615 ok &= FLAC__stream_encoder_set_apodization (encoder, compression_levels_[value].apodization); 1616#else 1617 /* equivalent to -A tukey(0.5) */ 1618 encoder->protected_->num_apodizations = 1; 1619 encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY; 1620 encoder->protected_->apodizations[0].parameters.tukey.p = 0.5; 1621#endif 1622#endif 1623 ok &= FLAC__stream_encoder_set_max_lpc_order (encoder, compression_levels_[value].max_lpc_order); 1624 ok &= FLAC__stream_encoder_set_qlp_coeff_precision (encoder, compression_levels_[value].qlp_coeff_precision); 1625 ok &= FLAC__stream_encoder_set_do_qlp_coeff_prec_search (encoder, compression_levels_[value].do_qlp_coeff_prec_search); 1626 ok &= FLAC__stream_encoder_set_do_escape_coding (encoder, compression_levels_[value].do_escape_coding); 1627 ok &= FLAC__stream_encoder_set_do_exhaustive_model_search (encoder, compression_levels_[value].do_exhaustive_model_search); 1628 ok &= FLAC__stream_encoder_set_min_residual_partition_order(encoder, compression_levels_[value].min_residual_partition_order); 1629 ok &= FLAC__stream_encoder_set_max_residual_partition_order(encoder, compression_levels_[value].max_residual_partition_order); 1630 ok &= FLAC__stream_encoder_set_rice_parameter_search_dist (encoder, compression_levels_[value].rice_parameter_search_dist); 1631 return ok; 1632} 1633 1634FLAC_API FLAC__bool FLAC__stream_encoder_set_blocksize(FLAC__StreamEncoder *encoder, unsigned value) 1635{ 1636 FLAC__ASSERT(0 != encoder); 1637 FLAC__ASSERT(0 != encoder->private_); 1638 FLAC__ASSERT(0 != encoder->protected_); 1639 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1640 return false; 1641 encoder->protected_->blocksize = value; 1642 return true; 1643} 1644 1645FLAC_API FLAC__bool FLAC__stream_encoder_set_do_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value) 1646{ 1647 FLAC__ASSERT(0 != encoder); 1648 FLAC__ASSERT(0 != encoder->private_); 1649 FLAC__ASSERT(0 != encoder->protected_); 1650 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1651 return false; 1652 encoder->protected_->do_mid_side_stereo = value; 1653 return true; 1654} 1655 1656FLAC_API FLAC__bool FLAC__stream_encoder_set_loose_mid_side_stereo(FLAC__StreamEncoder *encoder, FLAC__bool value) 1657{ 1658 FLAC__ASSERT(0 != encoder); 1659 FLAC__ASSERT(0 != encoder->private_); 1660 FLAC__ASSERT(0 != encoder->protected_); 1661 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1662 return false; 1663 encoder->protected_->loose_mid_side_stereo = value; 1664 return true; 1665} 1666 1667/*@@@@add to tests*/ 1668FLAC_API FLAC__bool FLAC__stream_encoder_set_apodization(FLAC__StreamEncoder *encoder, const char *specification) 1669{ 1670 FLAC__ASSERT(0 != encoder); 1671 FLAC__ASSERT(0 != encoder->private_); 1672 FLAC__ASSERT(0 != encoder->protected_); 1673 FLAC__ASSERT(0 != specification); 1674 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1675 return false; 1676#ifdef FLAC__INTEGER_ONLY_LIBRARY 1677 (void)specification; /* silently ignore since we haven't integerized; will always use a rectangular window */ 1678#else 1679 encoder->protected_->num_apodizations = 0; 1680 while(1) { 1681 const char *s = strchr(specification, ';'); 1682 const size_t n = s? (size_t)(s - specification) : strlen(specification); 1683 if (n==8 && 0 == strncmp("bartlett" , specification, n)) 1684 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT; 1685 else if(n==13 && 0 == strncmp("bartlett_hann", specification, n)) 1686 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BARTLETT_HANN; 1687 else if(n==8 && 0 == strncmp("blackman" , specification, n)) 1688 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN; 1689 else if(n==26 && 0 == strncmp("blackman_harris_4term_92db", specification, n)) 1690 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE; 1691 else if(n==6 && 0 == strncmp("connes" , specification, n)) 1692 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_CONNES; 1693 else if(n==7 && 0 == strncmp("flattop" , specification, n)) 1694 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_FLATTOP; 1695 else if(n>7 && 0 == strncmp("gauss(" , specification, 6)) { 1696 FLAC__real stddev = (FLAC__real)strtod(specification+6, 0); 1697 if (stddev > 0.0 && stddev <= 0.5) { 1698 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.gauss.stddev = stddev; 1699 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_GAUSS; 1700 } 1701 } 1702 else if(n==7 && 0 == strncmp("hamming" , specification, n)) 1703 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HAMMING; 1704 else if(n==4 && 0 == strncmp("hann" , specification, n)) 1705 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_HANN; 1706 else if(n==13 && 0 == strncmp("kaiser_bessel", specification, n)) 1707 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_KAISER_BESSEL; 1708 else if(n==7 && 0 == strncmp("nuttall" , specification, n)) 1709 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_NUTTALL; 1710 else if(n==9 && 0 == strncmp("rectangle" , specification, n)) 1711 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_RECTANGLE; 1712 else if(n==8 && 0 == strncmp("triangle" , specification, n)) 1713 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TRIANGLE; 1714 else if(n>7 && 0 == strncmp("tukey(" , specification, 6)) { 1715 FLAC__real p = (FLAC__real)strtod(specification+6, 0); 1716 if (p >= 0.0 && p <= 1.0) { 1717 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.tukey.p = p; 1718 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TUKEY; 1719 } 1720 } 1721 else if(n>15 && 0 == strncmp("partial_tukey(" , specification, 14)) { 1722 FLAC__int32 tukey_parts = (FLAC__int32)strtod(specification+14, 0); 1723 const char *si_1 = strchr(specification, '/'); 1724 FLAC__real overlap = si_1?flac_min((FLAC__real)strtod(si_1+1, 0),0.99f):0.1f; 1725 FLAC__real overlap_units = 1.0f/(1.0f - overlap) - 1.0f; 1726 const char *si_2 = strchr((si_1?(si_1+1):specification), '/'); 1727 FLAC__real tukey_p = si_2?(FLAC__real)strtod(si_2+1, 0):0.2f; 1728 1729 if (tukey_parts <= 1) { 1730 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.tukey.p = tukey_p; 1731 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TUKEY; 1732 }else if (encoder->protected_->num_apodizations + tukey_parts < 32){ 1733 FLAC__int32 m; 1734 for(m = 0; m < tukey_parts; m++){ 1735 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.multiple_tukey.p = tukey_p; 1736 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.multiple_tukey.start = m/(tukey_parts+overlap_units); 1737 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.multiple_tukey.end = (m+1+overlap_units)/(tukey_parts+overlap_units); 1738 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_PARTIAL_TUKEY; 1739 } 1740 } 1741 } 1742 else if(n>16 && 0 == strncmp("punchout_tukey(" , specification, 15)) { 1743 FLAC__int32 tukey_parts = (FLAC__int32)strtod(specification+15, 0); 1744 const char *si_1 = strchr(specification, '/'); 1745 FLAC__real overlap = si_1?flac_min((FLAC__real)strtod(si_1+1, 0),0.99f):0.2f; 1746 FLAC__real overlap_units = 1.0f/(1.0f - overlap) - 1.0f; 1747 const char *si_2 = strchr((si_1?(si_1+1):specification), '/'); 1748 FLAC__real tukey_p = si_2?(FLAC__real)strtod(si_2+1, 0):0.2f; 1749 1750 if (tukey_parts <= 1) { 1751 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.tukey.p = tukey_p; 1752 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_TUKEY; 1753 }else if (encoder->protected_->num_apodizations + tukey_parts < 32){ 1754 FLAC__int32 m; 1755 for(m = 0; m < tukey_parts; m++){ 1756 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.multiple_tukey.p = tukey_p; 1757 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.multiple_tukey.start = m/(tukey_parts+overlap_units); 1758 encoder->protected_->apodizations[encoder->protected_->num_apodizations].parameters.multiple_tukey.end = (m+1+overlap_units)/(tukey_parts+overlap_units); 1759 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_PUNCHOUT_TUKEY; 1760 } 1761 } 1762 } 1763 else if(n==5 && 0 == strncmp("welch" , specification, n)) 1764 encoder->protected_->apodizations[encoder->protected_->num_apodizations++].type = FLAC__APODIZATION_WELCH; 1765 if (encoder->protected_->num_apodizations == 32) 1766 break; 1767 if (s) 1768 specification = s+1; 1769 else 1770 break; 1771 } 1772 if(encoder->protected_->num_apodizations == 0) { 1773 encoder->protected_->num_apodizations = 1; 1774 encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY; 1775 encoder->protected_->apodizations[0].parameters.tukey.p = 0.5; 1776 } 1777#endif 1778 return true; 1779} 1780 1781FLAC_API FLAC__bool FLAC__stream_encoder_set_max_lpc_order(FLAC__StreamEncoder *encoder, unsigned value) 1782{ 1783 FLAC__ASSERT(0 != encoder); 1784 FLAC__ASSERT(0 != encoder->private_); 1785 FLAC__ASSERT(0 != encoder->protected_); 1786 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1787 return false; 1788 encoder->protected_->max_lpc_order = value; 1789 return true; 1790} 1791 1792FLAC_API FLAC__bool FLAC__stream_encoder_set_qlp_coeff_precision(FLAC__StreamEncoder *encoder, unsigned value) 1793{ 1794 FLAC__ASSERT(0 != encoder); 1795 FLAC__ASSERT(0 != encoder->private_); 1796 FLAC__ASSERT(0 != encoder->protected_); 1797 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1798 return false; 1799 encoder->protected_->qlp_coeff_precision = value; 1800 return true; 1801} 1802 1803FLAC_API FLAC__bool FLAC__stream_encoder_set_do_qlp_coeff_prec_search(FLAC__StreamEncoder *encoder, FLAC__bool value) 1804{ 1805 FLAC__ASSERT(0 != encoder); 1806 FLAC__ASSERT(0 != encoder->private_); 1807 FLAC__ASSERT(0 != encoder->protected_); 1808 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1809 return false; 1810 encoder->protected_->do_qlp_coeff_prec_search = value; 1811 return true; 1812} 1813 1814FLAC_API FLAC__bool FLAC__stream_encoder_set_do_escape_coding(FLAC__StreamEncoder *encoder, FLAC__bool value) 1815{ 1816 FLAC__ASSERT(0 != encoder); 1817 FLAC__ASSERT(0 != encoder->private_); 1818 FLAC__ASSERT(0 != encoder->protected_); 1819 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1820 return false; 1821#if 0 1822 /*@@@ deprecated: */ 1823 encoder->protected_->do_escape_coding = value; 1824#else 1825 (void)value; 1826#endif 1827 return true; 1828} 1829 1830FLAC_API FLAC__bool FLAC__stream_encoder_set_do_exhaustive_model_search(FLAC__StreamEncoder *encoder, FLAC__bool value) 1831{ 1832 FLAC__ASSERT(0 != encoder); 1833 FLAC__ASSERT(0 != encoder->private_); 1834 FLAC__ASSERT(0 != encoder->protected_); 1835 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1836 return false; 1837 encoder->protected_->do_exhaustive_model_search = value; 1838 return true; 1839} 1840 1841FLAC_API FLAC__bool FLAC__stream_encoder_set_min_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value) 1842{ 1843 FLAC__ASSERT(0 != encoder); 1844 FLAC__ASSERT(0 != encoder->private_); 1845 FLAC__ASSERT(0 != encoder->protected_); 1846 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1847 return false; 1848 encoder->protected_->min_residual_partition_order = value; 1849 return true; 1850} 1851 1852FLAC_API FLAC__bool FLAC__stream_encoder_set_max_residual_partition_order(FLAC__StreamEncoder *encoder, unsigned value) 1853{ 1854 FLAC__ASSERT(0 != encoder); 1855 FLAC__ASSERT(0 != encoder->private_); 1856 FLAC__ASSERT(0 != encoder->protected_); 1857 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1858 return false; 1859 encoder->protected_->max_residual_partition_order = value; 1860 return true; 1861} 1862 1863FLAC_API FLAC__bool FLAC__stream_encoder_set_rice_parameter_search_dist(FLAC__StreamEncoder *encoder, unsigned value) 1864{ 1865 FLAC__ASSERT(0 != encoder); 1866 FLAC__ASSERT(0 != encoder->private_); 1867 FLAC__ASSERT(0 != encoder->protected_); 1868 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1869 return false; 1870#if 0 1871 /*@@@ deprecated: */ 1872 encoder->protected_->rice_parameter_search_dist = value; 1873#else 1874 (void)value; 1875#endif 1876 return true; 1877} 1878 1879FLAC_API FLAC__bool FLAC__stream_encoder_set_total_samples_estimate(FLAC__StreamEncoder *encoder, FLAC__uint64 value) 1880{ 1881 FLAC__ASSERT(0 != encoder); 1882 FLAC__ASSERT(0 != encoder->private_); 1883 FLAC__ASSERT(0 != encoder->protected_); 1884 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1885 return false; 1886 encoder->protected_->total_samples_estimate = value; 1887 return true; 1888} 1889 1890FLAC_API FLAC__bool FLAC__stream_encoder_set_metadata(FLAC__StreamEncoder *encoder, FLAC__StreamMetadata **metadata, unsigned num_blocks) 1891{ 1892 FLAC__ASSERT(0 != encoder); 1893 FLAC__ASSERT(0 != encoder->private_); 1894 FLAC__ASSERT(0 != encoder->protected_); 1895 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1896 return false; 1897 if(0 == metadata) 1898 num_blocks = 0; 1899 if(0 == num_blocks) 1900 metadata = 0; 1901 /* realloc() does not do exactly what we want so... */ 1902 if(encoder->protected_->metadata) { 1903 free(encoder->protected_->metadata); 1904 encoder->protected_->metadata = 0; 1905 encoder->protected_->num_metadata_blocks = 0; 1906 } 1907 if(num_blocks) { 1908 FLAC__StreamMetadata **m; 1909 if(0 == (m = safe_malloc_mul_2op_p(sizeof(m[0]), /*times*/num_blocks))) 1910 return false; 1911 memcpy(m, metadata, sizeof(m[0]) * num_blocks); 1912 encoder->protected_->metadata = m; 1913 encoder->protected_->num_metadata_blocks = num_blocks; 1914 } 1915#if FLAC__HAS_OGG 1916 if(!FLAC__ogg_encoder_aspect_set_num_metadata(&encoder->protected_->ogg_encoder_aspect, num_blocks)) 1917 return false; 1918#endif 1919 return true; 1920} 1921 1922/* 1923 * These three functions are not static, but not publically exposed in 1924 * include/FLAC/ either. They are used by the test suite. 1925 */ 1926FLAC_API FLAC__bool FLAC__stream_encoder_disable_constant_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value) 1927{ 1928 FLAC__ASSERT(0 != encoder); 1929 FLAC__ASSERT(0 != encoder->private_); 1930 FLAC__ASSERT(0 != encoder->protected_); 1931 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1932 return false; 1933 encoder->private_->disable_constant_subframes = value; 1934 return true; 1935} 1936 1937FLAC_API FLAC__bool FLAC__stream_encoder_disable_fixed_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value) 1938{ 1939 FLAC__ASSERT(0 != encoder); 1940 FLAC__ASSERT(0 != encoder->private_); 1941 FLAC__ASSERT(0 != encoder->protected_); 1942 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1943 return false; 1944 encoder->private_->disable_fixed_subframes = value; 1945 return true; 1946} 1947 1948FLAC_API FLAC__bool FLAC__stream_encoder_disable_verbatim_subframes(FLAC__StreamEncoder *encoder, FLAC__bool value) 1949{ 1950 FLAC__ASSERT(0 != encoder); 1951 FLAC__ASSERT(0 != encoder->private_); 1952 FLAC__ASSERT(0 != encoder->protected_); 1953 if(encoder->protected_->state != FLAC__STREAM_ENCODER_UNINITIALIZED) 1954 return false; 1955 encoder->private_->disable_verbatim_subframes = value; 1956 return true; 1957} 1958 1959FLAC_API FLAC__StreamEncoderState FLAC__stream_encoder_get_state(const FLAC__StreamEncoder *encoder) 1960{ 1961 FLAC__ASSERT(0 != encoder); 1962 FLAC__ASSERT(0 != encoder->private_); 1963 FLAC__ASSERT(0 != encoder->protected_); 1964 return encoder->protected_->state; 1965} 1966 1967FLAC_API FLAC__StreamDecoderState FLAC__stream_encoder_get_verify_decoder_state(const FLAC__StreamEncoder *encoder) 1968{ 1969 FLAC__ASSERT(0 != encoder); 1970 FLAC__ASSERT(0 != encoder->private_); 1971 FLAC__ASSERT(0 != encoder->protected_); 1972 if(encoder->protected_->verify) 1973 return FLAC__stream_decoder_get_state(encoder->private_->verify.decoder); 1974 else 1975 return FLAC__STREAM_DECODER_UNINITIALIZED; 1976} 1977 1978FLAC_API const char *FLAC__stream_encoder_get_resolved_state_string(const FLAC__StreamEncoder *encoder) 1979{ 1980 FLAC__ASSERT(0 != encoder); 1981 FLAC__ASSERT(0 != encoder->private_); 1982 FLAC__ASSERT(0 != encoder->protected_); 1983 if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR) 1984 return FLAC__StreamEncoderStateString[encoder->protected_->state]; 1985 else 1986 return FLAC__stream_decoder_get_resolved_state_string(encoder->private_->verify.decoder); 1987} 1988 1989FLAC_API void FLAC__stream_encoder_get_verify_decoder_error_stats(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_sample, unsigned *frame_number, unsigned *channel, unsigned *sample, FLAC__int32 *expected, FLAC__int32 *got) 1990{ 1991 FLAC__ASSERT(0 != encoder); 1992 FLAC__ASSERT(0 != encoder->private_); 1993 FLAC__ASSERT(0 != encoder->protected_); 1994 if(0 != absolute_sample) 1995 *absolute_sample = encoder->private_->verify.error_stats.absolute_sample; 1996 if(0 != frame_number) 1997 *frame_number = encoder->private_->verify.error_stats.frame_number; 1998 if(0 != channel) 1999 *channel = encoder->private_->verify.error_stats.channel; 2000 if(0 != sample) 2001 *sample = encoder->private_->verify.error_stats.sample; 2002 if(0 != expected) 2003 *expected = encoder->private_->verify.error_stats.expected; 2004 if(0 != got) 2005 *got = encoder->private_->verify.error_stats.got; 2006} 2007 2008FLAC_API FLAC__bool FLAC__stream_encoder_get_verify(const FLAC__StreamEncoder *encoder) 2009{ 2010 FLAC__ASSERT(0 != encoder); 2011 FLAC__ASSERT(0 != encoder->private_); 2012 FLAC__ASSERT(0 != encoder->protected_); 2013 return encoder->protected_->verify; 2014} 2015 2016FLAC_API FLAC__bool FLAC__stream_encoder_get_streamable_subset(const FLAC__StreamEncoder *encoder) 2017{ 2018 FLAC__ASSERT(0 != encoder); 2019 FLAC__ASSERT(0 != encoder->private_); 2020 FLAC__ASSERT(0 != encoder->protected_); 2021 return encoder->protected_->streamable_subset; 2022} 2023 2024FLAC_API FLAC__bool FLAC__stream_encoder_get_do_md5(const FLAC__StreamEncoder *encoder) 2025{ 2026 FLAC__ASSERT(0 != encoder); 2027 FLAC__ASSERT(0 != encoder->private_); 2028 FLAC__ASSERT(0 != encoder->protected_); 2029 return encoder->protected_->do_md5; 2030} 2031 2032FLAC_API unsigned FLAC__stream_encoder_get_channels(const FLAC__StreamEncoder *encoder) 2033{ 2034 FLAC__ASSERT(0 != encoder); 2035 FLAC__ASSERT(0 != encoder->private_); 2036 FLAC__ASSERT(0 != encoder->protected_); 2037 return encoder->protected_->channels; 2038} 2039 2040FLAC_API unsigned FLAC__stream_encoder_get_bits_per_sample(const FLAC__StreamEncoder *encoder) 2041{ 2042 FLAC__ASSERT(0 != encoder); 2043 FLAC__ASSERT(0 != encoder->private_); 2044 FLAC__ASSERT(0 != encoder->protected_); 2045 return encoder->protected_->bits_per_sample; 2046} 2047 2048FLAC_API unsigned FLAC__stream_encoder_get_sample_rate(const FLAC__StreamEncoder *encoder) 2049{ 2050 FLAC__ASSERT(0 != encoder); 2051 FLAC__ASSERT(0 != encoder->private_); 2052 FLAC__ASSERT(0 != encoder->protected_); 2053 return encoder->protected_->sample_rate; 2054} 2055 2056FLAC_API unsigned FLAC__stream_encoder_get_blocksize(const FLAC__StreamEncoder *encoder) 2057{ 2058 FLAC__ASSERT(0 != encoder); 2059 FLAC__ASSERT(0 != encoder->private_); 2060 FLAC__ASSERT(0 != encoder->protected_); 2061 return encoder->protected_->blocksize; 2062} 2063 2064FLAC_API FLAC__bool FLAC__stream_encoder_get_do_mid_side_stereo(const FLAC__StreamEncoder *encoder) 2065{ 2066 FLAC__ASSERT(0 != encoder); 2067 FLAC__ASSERT(0 != encoder->private_); 2068 FLAC__ASSERT(0 != encoder->protected_); 2069 return encoder->protected_->do_mid_side_stereo; 2070} 2071 2072FLAC_API FLAC__bool FLAC__stream_encoder_get_loose_mid_side_stereo(const FLAC__StreamEncoder *encoder) 2073{ 2074 FLAC__ASSERT(0 != encoder); 2075 FLAC__ASSERT(0 != encoder->private_); 2076 FLAC__ASSERT(0 != encoder->protected_); 2077 return encoder->protected_->loose_mid_side_stereo; 2078} 2079 2080FLAC_API unsigned FLAC__stream_encoder_get_max_lpc_order(const FLAC__StreamEncoder *encoder) 2081{ 2082 FLAC__ASSERT(0 != encoder); 2083 FLAC__ASSERT(0 != encoder->private_); 2084 FLAC__ASSERT(0 != encoder->protected_); 2085 return encoder->protected_->max_lpc_order; 2086} 2087 2088FLAC_API unsigned FLAC__stream_encoder_get_qlp_coeff_precision(const FLAC__StreamEncoder *encoder) 2089{ 2090 FLAC__ASSERT(0 != encoder); 2091 FLAC__ASSERT(0 != encoder->private_); 2092 FLAC__ASSERT(0 != encoder->protected_); 2093 return encoder->protected_->qlp_coeff_precision; 2094} 2095 2096FLAC_API FLAC__bool FLAC__stream_encoder_get_do_qlp_coeff_prec_search(const FLAC__StreamEncoder *encoder) 2097{ 2098 FLAC__ASSERT(0 != encoder); 2099 FLAC__ASSERT(0 != encoder->private_); 2100 FLAC__ASSERT(0 != encoder->protected_); 2101 return encoder->protected_->do_qlp_coeff_prec_search; 2102} 2103 2104FLAC_API FLAC__bool FLAC__stream_encoder_get_do_escape_coding(const FLAC__StreamEncoder *encoder) 2105{ 2106 FLAC__ASSERT(0 != encoder); 2107 FLAC__ASSERT(0 != encoder->private_); 2108 FLAC__ASSERT(0 != encoder->protected_); 2109 return encoder->protected_->do_escape_coding; 2110} 2111 2112FLAC_API FLAC__bool FLAC__stream_encoder_get_do_exhaustive_model_search(const FLAC__StreamEncoder *encoder) 2113{ 2114 FLAC__ASSERT(0 != encoder); 2115 FLAC__ASSERT(0 != encoder->private_); 2116 FLAC__ASSERT(0 != encoder->protected_); 2117 return encoder->protected_->do_exhaustive_model_search; 2118} 2119 2120FLAC_API unsigned FLAC__stream_encoder_get_min_residual_partition_order(const FLAC__StreamEncoder *encoder) 2121{ 2122 FLAC__ASSERT(0 != encoder); 2123 FLAC__ASSERT(0 != encoder->private_); 2124 FLAC__ASSERT(0 != encoder->protected_); 2125 return encoder->protected_->min_residual_partition_order; 2126} 2127 2128FLAC_API unsigned FLAC__stream_encoder_get_max_residual_partition_order(const FLAC__StreamEncoder *encoder) 2129{ 2130 FLAC__ASSERT(0 != encoder); 2131 FLAC__ASSERT(0 != encoder->private_); 2132 FLAC__ASSERT(0 != encoder->protected_); 2133 return encoder->protected_->max_residual_partition_order; 2134} 2135 2136FLAC_API unsigned FLAC__stream_encoder_get_rice_parameter_search_dist(const FLAC__StreamEncoder *encoder) 2137{ 2138 FLAC__ASSERT(0 != encoder); 2139 FLAC__ASSERT(0 != encoder->private_); 2140 FLAC__ASSERT(0 != encoder->protected_); 2141 return encoder->protected_->rice_parameter_search_dist; 2142} 2143 2144FLAC_API FLAC__uint64 FLAC__stream_encoder_get_total_samples_estimate(const FLAC__StreamEncoder *encoder) 2145{ 2146 FLAC__ASSERT(0 != encoder); 2147 FLAC__ASSERT(0 != encoder->private_); 2148 FLAC__ASSERT(0 != encoder->protected_); 2149 return encoder->protected_->total_samples_estimate; 2150} 2151 2152FLAC_API FLAC__bool FLAC__stream_encoder_process(FLAC__StreamEncoder *encoder, const FLAC__int32 * const buffer[], unsigned samples) 2153{ 2154 unsigned i, j = 0, channel; 2155 const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize; 2156 2157 FLAC__ASSERT(0 != encoder); 2158 FLAC__ASSERT(0 != encoder->private_); 2159 FLAC__ASSERT(0 != encoder->protected_); 2160 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); 2161 2162// FLAC__ASSERT(samples <= blocksize); 2163 2164 do { 2165 const unsigned n = flac_min(blocksize+OVERREAD_-encoder->private_->current_sample_number, samples-j); 2166 2167 if(encoder->protected_->verify) 2168 append_to_verify_fifo_(&encoder->private_->verify.input_fifo, buffer, j, channels, n); 2169 2170 for(channel = 0; channel < channels; channel++) { 2171 if (buffer[channel] == NULL) { 2172 return false; 2173 } 2174 memcpy(&encoder->private_->integer_signal[channel][encoder->private_->current_sample_number], &buffer[channel][j], sizeof(buffer[channel][0]) * n); 2175 } 2176 2177 if(encoder->protected_->do_mid_side_stereo) { 2178 FLAC__ASSERT(channels == 2); 2179 /* "i <= blocksize" to overread 1 sample; see comment in OVERREAD_ decl */ 2180 for(i = encoder->private_->current_sample_number; i <= blocksize && j < samples; i++, j++) { 2181 encoder->private_->integer_signal_mid_side[1][i] = buffer[0][j] - buffer[1][j]; 2182 encoder->private_->integer_signal_mid_side[0][i] = (buffer[0][j] + buffer[1][j]) >> 1; /* NOTE: not the same as 'mid = (buffer[0][j] + buffer[1][j]) / 2' ! */ 2183 } 2184 } 2185 else 2186 j += n; 2187 2188 encoder->private_->current_sample_number += n; 2189 2190 /* we only process if we have a full block + 1 extra sample; final block is always handled by FLAC__stream_encoder_finish() */ 2191 if(encoder->private_->current_sample_number > blocksize) { 2192 FLAC__ASSERT(encoder->private_->current_sample_number == blocksize+OVERREAD_); 2193 FLAC__ASSERT(OVERREAD_ == 1); /* assert we only overread 1 sample which simplifies the rest of the code below */ 2194 if(!process_frame_(encoder, /*is_fractional_block=*/false, /*is_last_block=*/false)) 2195 return false; 2196 /* move unprocessed overread samples to beginnings of arrays */ 2197 for(channel = 0; channel < channels; channel++) 2198 encoder->private_->integer_signal[channel][0] = encoder->private_->integer_signal[channel][blocksize]; 2199 if(encoder->protected_->do_mid_side_stereo) { 2200 encoder->private_->integer_signal_mid_side[0][0] = encoder->private_->integer_signal_mid_side[0][blocksize]; 2201 encoder->private_->integer_signal_mid_side[1][0] = encoder->private_->integer_signal_mid_side[1][blocksize]; 2202 } 2203 encoder->private_->current_sample_number = 1; 2204 } 2205 } while(j < samples); 2206 2207 return true; 2208} 2209 2210FLAC_API FLAC__bool FLAC__stream_encoder_process_interleaved(FLAC__StreamEncoder *encoder, const FLAC__int32 buffer[], unsigned samples) 2211{ 2212 unsigned i, j, k, channel; 2213 FLAC__int32 x, mid, side; 2214 const unsigned channels = encoder->protected_->channels, blocksize = encoder->protected_->blocksize; 2215 2216 FLAC__ASSERT(0 != encoder); 2217 FLAC__ASSERT(0 != encoder->private_); 2218 FLAC__ASSERT(0 != encoder->protected_); 2219 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); 2220 2221 j = k = 0; 2222 /* 2223 * we have several flavors of the same basic loop, optimized for 2224 * different conditions: 2225 */ 2226 if(encoder->protected_->do_mid_side_stereo && channels == 2) { 2227 /* 2228 * stereo coding: unroll channel loop 2229 */ 2230 do { 2231 if(encoder->protected_->verify) 2232 append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, flac_min(blocksize+OVERREAD_-encoder->private_->current_sample_number, samples-j)); 2233 2234 /* "i <= blocksize" to overread 1 sample; see comment in OVERREAD_ decl */ 2235 for(i = encoder->private_->current_sample_number; i <= blocksize && j < samples; i++, j++) { 2236 encoder->private_->integer_signal[0][i] = mid = side = buffer[k++]; 2237 x = buffer[k++]; 2238 encoder->private_->integer_signal[1][i] = x; 2239 mid += x; 2240 side -= x; 2241 mid >>= 1; /* NOTE: not the same as 'mid = (left + right) / 2' ! */ 2242 encoder->private_->integer_signal_mid_side[1][i] = side; 2243 encoder->private_->integer_signal_mid_side[0][i] = mid; 2244 } 2245 encoder->private_->current_sample_number = i; 2246 /* we only process if we have a full block + 1 extra sample; final block is always handled by FLAC__stream_encoder_finish() */ 2247 if(i > blocksize) { 2248 if(!process_frame_(encoder, /*is_fractional_block=*/false, /*is_last_block=*/false)) 2249 return false; 2250 /* move unprocessed overread samples to beginnings of arrays */ 2251 FLAC__ASSERT(i == blocksize+OVERREAD_); 2252 FLAC__ASSERT(OVERREAD_ == 1); /* assert we only overread 1 sample which simplifies the rest of the code below */ 2253 encoder->private_->integer_signal[0][0] = encoder->private_->integer_signal[0][blocksize]; 2254 encoder->private_->integer_signal[1][0] = encoder->private_->integer_signal[1][blocksize]; 2255 encoder->private_->integer_signal_mid_side[0][0] = encoder->private_->integer_signal_mid_side[0][blocksize]; 2256 encoder->private_->integer_signal_mid_side[1][0] = encoder->private_->integer_signal_mid_side[1][blocksize]; 2257 encoder->private_->current_sample_number = 1; 2258 } 2259 } while(j < samples); 2260 } 2261 else { 2262 /* 2263 * independent channel coding: buffer each channel in inner loop 2264 */ 2265 do { 2266 if(encoder->protected_->verify) 2267 append_to_verify_fifo_interleaved_(&encoder->private_->verify.input_fifo, buffer, j, channels, flac_min(blocksize+OVERREAD_-encoder->private_->current_sample_number, samples-j)); 2268 2269 /* "i <= blocksize" to overread 1 sample; see comment in OVERREAD_ decl */ 2270 for(i = encoder->private_->current_sample_number; i <= blocksize && j < samples; i++, j++) { 2271 for(channel = 0; channel < channels; channel++) 2272 encoder->private_->integer_signal[channel][i] = buffer[k++]; 2273 } 2274 encoder->private_->current_sample_number = i; 2275 /* we only process if we have a full block + 1 extra sample; final block is always handled by FLAC__stream_encoder_finish() */ 2276 if(i > blocksize) { 2277 if(!process_frame_(encoder, /*is_fractional_block=*/false, /*is_last_block=*/false)) 2278 return false; 2279 /* move unprocessed overread samples to beginnings of arrays */ 2280 FLAC__ASSERT(i == blocksize+OVERREAD_); 2281 FLAC__ASSERT(OVERREAD_ == 1); /* assert we only overread 1 sample which simplifies the rest of the code below */ 2282 for(channel = 0; channel < channels; channel++) 2283 encoder->private_->integer_signal[channel][0] = encoder->private_->integer_signal[channel][blocksize]; 2284 encoder->private_->current_sample_number = 1; 2285 } 2286 } while(j < samples); 2287 } 2288 2289 return true; 2290} 2291 2292/*********************************************************************** 2293 * 2294 * Private class methods 2295 * 2296 ***********************************************************************/ 2297 2298void set_defaults_(FLAC__StreamEncoder *encoder) 2299{ 2300 FLAC__ASSERT(0 != encoder); 2301 2302#ifdef FLAC__MANDATORY_VERIFY_WHILE_ENCODING 2303 encoder->protected_->verify = true; 2304#else 2305 encoder->protected_->verify = false; 2306#endif 2307 encoder->protected_->streamable_subset = true; 2308 encoder->protected_->do_md5 = true; 2309 encoder->protected_->do_mid_side_stereo = false; 2310 encoder->protected_->loose_mid_side_stereo = false; 2311 encoder->protected_->channels = 2; 2312 encoder->protected_->bits_per_sample = 16; 2313 encoder->protected_->sample_rate = 44100; 2314 encoder->protected_->blocksize = 0; 2315#ifndef FLAC__INTEGER_ONLY_LIBRARY 2316 encoder->protected_->num_apodizations = 1; 2317 encoder->protected_->apodizations[0].type = FLAC__APODIZATION_TUKEY; 2318 encoder->protected_->apodizations[0].parameters.tukey.p = 0.5; 2319#endif 2320 encoder->protected_->max_lpc_order = 0; 2321 encoder->protected_->qlp_coeff_precision = 0; 2322 encoder->protected_->do_qlp_coeff_prec_search = false; 2323 encoder->protected_->do_exhaustive_model_search = false; 2324 encoder->protected_->do_escape_coding = false; 2325 encoder->protected_->min_residual_partition_order = 0; 2326 encoder->protected_->max_residual_partition_order = 0; 2327 encoder->protected_->rice_parameter_search_dist = 0; 2328 encoder->protected_->total_samples_estimate = 0; 2329 encoder->protected_->metadata = 0; 2330 encoder->protected_->num_metadata_blocks = 0; 2331 2332 encoder->private_->seek_table = 0; 2333 encoder->private_->disable_constant_subframes = false; 2334 encoder->private_->disable_fixed_subframes = false; 2335 encoder->private_->disable_verbatim_subframes = false; 2336#if FLAC__HAS_OGG 2337 encoder->private_->is_ogg = false; 2338#endif 2339 encoder->private_->read_callback = 0; 2340 encoder->private_->write_callback = 0; 2341 encoder->private_->seek_callback = 0; 2342 encoder->private_->tell_callback = 0; 2343 encoder->private_->metadata_callback = 0; 2344 encoder->private_->progress_callback = 0; 2345 encoder->private_->client_data = 0; 2346 2347#if FLAC__HAS_OGG 2348 FLAC__ogg_encoder_aspect_set_defaults(&encoder->protected_->ogg_encoder_aspect); 2349#endif 2350 2351 FLAC__stream_encoder_set_compression_level(encoder, 5); 2352} 2353 2354void free_(FLAC__StreamEncoder *encoder) 2355{ 2356 unsigned i, channel; 2357 2358 FLAC__ASSERT(0 != encoder); 2359 if(encoder->protected_->metadata) { 2360 free(encoder->protected_->metadata); 2361 encoder->protected_->metadata = 0; 2362 encoder->protected_->num_metadata_blocks = 0; 2363 } 2364 for(i = 0; i < encoder->protected_->channels; i++) { 2365 if(0 != encoder->private_->integer_signal_unaligned[i]) { 2366 free(encoder->private_->integer_signal_unaligned[i]); 2367 encoder->private_->integer_signal_unaligned[i] = 0; 2368 } 2369#ifndef FLAC__INTEGER_ONLY_LIBRARY 2370 if(0 != encoder->private_->real_signal_unaligned[i]) { 2371 free(encoder->private_->real_signal_unaligned[i]); 2372 encoder->private_->real_signal_unaligned[i] = 0; 2373 } 2374#endif 2375 } 2376 for(i = 0; i < 2; i++) { 2377 if(0 != encoder->private_->integer_signal_mid_side_unaligned[i]) { 2378 free(encoder->private_->integer_signal_mid_side_unaligned[i]); 2379 encoder->private_->integer_signal_mid_side_unaligned[i] = 0; 2380 } 2381#ifndef FLAC__INTEGER_ONLY_LIBRARY 2382 if(0 != encoder->private_->real_signal_mid_side_unaligned[i]) { 2383 free(encoder->private_->real_signal_mid_side_unaligned[i]); 2384 encoder->private_->real_signal_mid_side_unaligned[i] = 0; 2385 } 2386#endif 2387 } 2388#ifndef FLAC__INTEGER_ONLY_LIBRARY 2389 for(i = 0; i < encoder->protected_->num_apodizations; i++) { 2390 if(0 != encoder->private_->window_unaligned[i]) { 2391 free(encoder->private_->window_unaligned[i]); 2392 encoder->private_->window_unaligned[i] = 0; 2393 } 2394 } 2395 if(0 != encoder->private_->windowed_signal_unaligned) { 2396 free(encoder->private_->windowed_signal_unaligned); 2397 encoder->private_->windowed_signal_unaligned = 0; 2398 } 2399#endif 2400 for(channel = 0; channel < encoder->protected_->channels; channel++) { 2401 for(i = 0; i < 2; i++) { 2402 if(0 != encoder->private_->residual_workspace_unaligned[channel][i]) { 2403 free(encoder->private_->residual_workspace_unaligned[channel][i]); 2404 encoder->private_->residual_workspace_unaligned[channel][i] = 0; 2405 } 2406 } 2407 } 2408 for(channel = 0; channel < 2; channel++) { 2409 for(i = 0; i < 2; i++) { 2410 if(0 != encoder->private_->residual_workspace_mid_side_unaligned[channel][i]) { 2411 free(encoder->private_->residual_workspace_mid_side_unaligned[channel][i]); 2412 encoder->private_->residual_workspace_mid_side_unaligned[channel][i] = 0; 2413 } 2414 } 2415 } 2416 if(0 != encoder->private_->abs_residual_partition_sums_unaligned) { 2417 free(encoder->private_->abs_residual_partition_sums_unaligned); 2418 encoder->private_->abs_residual_partition_sums_unaligned = 0; 2419 } 2420 if(0 != encoder->private_->raw_bits_per_partition_unaligned) { 2421 free(encoder->private_->raw_bits_per_partition_unaligned); 2422 encoder->private_->raw_bits_per_partition_unaligned = 0; 2423 } 2424 if(encoder->protected_->verify) { 2425 for(i = 0; i < encoder->protected_->channels; i++) { 2426 if(0 != encoder->private_->verify.input_fifo.data[i]) { 2427 free(encoder->private_->verify.input_fifo.data[i]); 2428 encoder->private_->verify.input_fifo.data[i] = 0; 2429 } 2430 } 2431 } 2432 FLAC__bitwriter_free(encoder->private_->frame); 2433} 2434 2435FLAC__bool resize_buffers_(FLAC__StreamEncoder *encoder, unsigned new_blocksize) 2436{ 2437 FLAC__bool ok; 2438 unsigned i, channel; 2439 2440 FLAC__ASSERT(new_blocksize > 0); 2441 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); 2442 FLAC__ASSERT(encoder->private_->current_sample_number == 0); 2443 2444 /* To avoid excessive malloc'ing, we only grow the buffer; no shrinking. */ 2445 if(new_blocksize <= encoder->private_->input_capacity) 2446 return true; 2447 2448 ok = true; 2449 2450 /* WATCHOUT: FLAC__lpc_compute_residual_from_qlp_coefficients_asm_ia32_mmx() and ..._intrin_sse2() 2451 * require that the input arrays (in our case the integer signals) 2452 * have a buffer of up to 3 zeroes in front (at negative indices) for 2453 * alignment purposes; we use 4 in front to keep the data well-aligned. 2454 */ 2455 2456 for(i = 0; ok && i < encoder->protected_->channels; i++) { 2457 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4+OVERREAD_, &encoder->private_->integer_signal_unaligned[i], &encoder->private_->integer_signal[i]); 2458 memset(encoder->private_->integer_signal[i], 0, sizeof(FLAC__int32)*4); 2459 encoder->private_->integer_signal[i] += 4; 2460#ifndef FLAC__INTEGER_ONLY_LIBRARY 2461#if 0 /* @@@ currently unused */ 2462 if(encoder->protected_->max_lpc_order > 0) 2463 ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize+OVERREAD_, &encoder->private_->real_signal_unaligned[i], &encoder->private_->real_signal[i]); 2464#endif 2465#endif 2466 } 2467 for(i = 0; ok && i < 2; i++) { 2468 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize+4+OVERREAD_, &encoder->private_->integer_signal_mid_side_unaligned[i], &encoder->private_->integer_signal_mid_side[i]); 2469 memset(encoder->private_->integer_signal_mid_side[i], 0, sizeof(FLAC__int32)*4); 2470 encoder->private_->integer_signal_mid_side[i] += 4; 2471#ifndef FLAC__INTEGER_ONLY_LIBRARY 2472#if 0 /* @@@ currently unused */ 2473 if(encoder->protected_->max_lpc_order > 0) 2474 ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize+OVERREAD_, &encoder->private_->real_signal_mid_side_unaligned[i], &encoder->private_->real_signal_mid_side[i]); 2475#endif 2476#endif 2477 } 2478#ifndef FLAC__INTEGER_ONLY_LIBRARY 2479 if(ok && encoder->protected_->max_lpc_order > 0) { 2480 for(i = 0; ok && i < encoder->protected_->num_apodizations; i++) 2481 ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->window_unaligned[i], &encoder->private_->window[i]); 2482 ok = ok && FLAC__memory_alloc_aligned_real_array(new_blocksize, &encoder->private_->windowed_signal_unaligned, &encoder->private_->windowed_signal); 2483 } 2484#endif 2485 for(channel = 0; ok && channel < encoder->protected_->channels; channel++) { 2486 for(i = 0; ok && i < 2; i++) { 2487 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_unaligned[channel][i], &encoder->private_->residual_workspace[channel][i]); 2488 } 2489 } 2490 for(channel = 0; ok && channel < 2; channel++) { 2491 for(i = 0; ok && i < 2; i++) { 2492 ok = ok && FLAC__memory_alloc_aligned_int32_array(new_blocksize, &encoder->private_->residual_workspace_mid_side_unaligned[channel][i], &encoder->private_->residual_workspace_mid_side[channel][i]); 2493 } 2494 } 2495 /* the *2 is an approximation to the series 1 + 1/2 + 1/4 + ... that sums tree occupies in a flat array */ 2496 /*@@@ new_blocksize*2 is too pessimistic, but to fix, we need smarter logic because a smaller new_blocksize can actually increase the # of partitions; would require moving this out into a separate function, then checking its capacity against the need of the current blocksize&min/max_partition_order (and maybe predictor order) */ 2497 ok = ok && FLAC__memory_alloc_aligned_uint64_array(new_blocksize * 2, &encoder->private_->abs_residual_partition_sums_unaligned, &encoder->private_->abs_residual_partition_sums); 2498 if(encoder->protected_->do_escape_coding) 2499 ok = ok && FLAC__memory_alloc_aligned_unsigned_array(new_blocksize * 2, &encoder->private_->raw_bits_per_partition_unaligned, &encoder->private_->raw_bits_per_partition); 2500 2501 /* now adjust the windows if the blocksize has changed */ 2502#ifndef FLAC__INTEGER_ONLY_LIBRARY 2503 if(ok && new_blocksize != encoder->private_->input_capacity && encoder->protected_->max_lpc_order > 0) { 2504 for(i = 0; ok && i < encoder->protected_->num_apodizations; i++) { 2505 switch(encoder->protected_->apodizations[i].type) { 2506 case FLAC__APODIZATION_BARTLETT: 2507 FLAC__window_bartlett(encoder->private_->window[i], new_blocksize); 2508 break; 2509 case FLAC__APODIZATION_BARTLETT_HANN: 2510 FLAC__window_bartlett_hann(encoder->private_->window[i], new_blocksize); 2511 break; 2512 case FLAC__APODIZATION_BLACKMAN: 2513 FLAC__window_blackman(encoder->private_->window[i], new_blocksize); 2514 break; 2515 case FLAC__APODIZATION_BLACKMAN_HARRIS_4TERM_92DB_SIDELOBE: 2516 FLAC__window_blackman_harris_4term_92db_sidelobe(encoder->private_->window[i], new_blocksize); 2517 break; 2518 case FLAC__APODIZATION_CONNES: 2519 FLAC__window_connes(encoder->private_->window[i], new_blocksize); 2520 break; 2521 case FLAC__APODIZATION_FLATTOP: 2522 FLAC__window_flattop(encoder->private_->window[i], new_blocksize); 2523 break; 2524 case FLAC__APODIZATION_GAUSS: 2525 FLAC__window_gauss(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.gauss.stddev); 2526 break; 2527 case FLAC__APODIZATION_HAMMING: 2528 FLAC__window_hamming(encoder->private_->window[i], new_blocksize); 2529 break; 2530 case FLAC__APODIZATION_HANN: 2531 FLAC__window_hann(encoder->private_->window[i], new_blocksize); 2532 break; 2533 case FLAC__APODIZATION_KAISER_BESSEL: 2534 FLAC__window_kaiser_bessel(encoder->private_->window[i], new_blocksize); 2535 break; 2536 case FLAC__APODIZATION_NUTTALL: 2537 FLAC__window_nuttall(encoder->private_->window[i], new_blocksize); 2538 break; 2539 case FLAC__APODIZATION_RECTANGLE: 2540 FLAC__window_rectangle(encoder->private_->window[i], new_blocksize); 2541 break; 2542 case FLAC__APODIZATION_TRIANGLE: 2543 FLAC__window_triangle(encoder->private_->window[i], new_blocksize); 2544 break; 2545 case FLAC__APODIZATION_TUKEY: 2546 FLAC__window_tukey(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.tukey.p); 2547 break; 2548 case FLAC__APODIZATION_PARTIAL_TUKEY: 2549 FLAC__window_partial_tukey(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.multiple_tukey.p, encoder->protected_->apodizations[i].parameters.multiple_tukey.start, encoder->protected_->apodizations[i].parameters.multiple_tukey.end); 2550 break; 2551 case FLAC__APODIZATION_PUNCHOUT_TUKEY: 2552 FLAC__window_punchout_tukey(encoder->private_->window[i], new_blocksize, encoder->protected_->apodizations[i].parameters.multiple_tukey.p, encoder->protected_->apodizations[i].parameters.multiple_tukey.start, encoder->protected_->apodizations[i].parameters.multiple_tukey.end); 2553 break; 2554 case FLAC__APODIZATION_WELCH: 2555 FLAC__window_welch(encoder->private_->window[i], new_blocksize); 2556 break; 2557 default: 2558 FLAC__ASSERT(0); 2559 /* double protection */ 2560 FLAC__window_hann(encoder->private_->window[i], new_blocksize); 2561 break; 2562 } 2563 } 2564 } 2565#endif 2566 2567 if(ok) 2568 encoder->private_->input_capacity = new_blocksize; 2569 else 2570 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; 2571 2572 return ok; 2573} 2574 2575FLAC__bool write_bitbuffer_(FLAC__StreamEncoder *encoder, unsigned samples, FLAC__bool is_last_block) 2576{ 2577 const FLAC__byte *buffer; 2578 size_t bytes; 2579 2580 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(encoder->private_->frame)); 2581 2582 if(!FLAC__bitwriter_get_buffer(encoder->private_->frame, &buffer, &bytes)) { 2583 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; 2584 return false; 2585 } 2586 2587 if(encoder->protected_->verify) { 2588 encoder->private_->verify.output.data = buffer; 2589 encoder->private_->verify.output.bytes = bytes; 2590 if(encoder->private_->verify.state_hint == ENCODER_IN_MAGIC) { 2591 encoder->private_->verify.needs_magic_hack = true; 2592 } 2593 else { 2594 if(!FLAC__stream_decoder_process_single(encoder->private_->verify.decoder)) { 2595 FLAC__bitwriter_release_buffer(encoder->private_->frame); 2596 FLAC__bitwriter_clear(encoder->private_->frame); 2597 if(encoder->protected_->state != FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA) 2598 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; 2599 return false; 2600 } 2601 } 2602 } 2603 2604 if(write_frame_(encoder, buffer, bytes, samples, is_last_block) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) { 2605 FLAC__bitwriter_release_buffer(encoder->private_->frame); 2606 FLAC__bitwriter_clear(encoder->private_->frame); 2607 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2608 return false; 2609 } 2610 2611 FLAC__bitwriter_release_buffer(encoder->private_->frame); 2612 FLAC__bitwriter_clear(encoder->private_->frame); 2613 2614 if(samples > 0) { 2615 encoder->private_->streaminfo.data.stream_info.min_framesize = flac_min(bytes, encoder->private_->streaminfo.data.stream_info.min_framesize); 2616 encoder->private_->streaminfo.data.stream_info.max_framesize = flac_max(bytes, encoder->private_->streaminfo.data.stream_info.max_framesize); 2617 } 2618 2619 return true; 2620} 2621 2622FLAC__StreamEncoderWriteStatus write_frame_(FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, FLAC__bool is_last_block) 2623{ 2624 FLAC__StreamEncoderWriteStatus status; 2625 FLAC__uint64 output_position = 0; 2626 2627#if FLAC__HAS_OGG == 0 2628 (void)is_last_block; 2629#endif 2630 2631 /* FLAC__STREAM_ENCODER_TELL_STATUS_UNSUPPORTED just means we didn't get the offset; no error */ 2632 if(encoder->private_->tell_callback && encoder->private_->tell_callback(encoder, &output_position, encoder->private_->client_data) == FLAC__STREAM_ENCODER_TELL_STATUS_ERROR) { 2633 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2634 return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR; 2635 } 2636 2637 /* 2638 * Watch for the STREAMINFO block and first SEEKTABLE block to go by and store their offsets. 2639 */ 2640 if(samples == 0) { 2641 FLAC__MetadataType type = (buffer[0] & 0x7f); 2642 if(type == FLAC__METADATA_TYPE_STREAMINFO) 2643 encoder->protected_->streaminfo_offset = output_position; 2644 else if(type == FLAC__METADATA_TYPE_SEEKTABLE && encoder->protected_->seektable_offset == 0) 2645 encoder->protected_->seektable_offset = output_position; 2646 } 2647 2648 /* 2649 * Mark the current seek point if hit (if audio_offset == 0 that 2650 * means we're still writing metadata and haven't hit the first 2651 * frame yet) 2652 */ 2653 if(0 != encoder->private_->seek_table && encoder->protected_->audio_offset > 0 && encoder->private_->seek_table->num_points > 0) { 2654 const unsigned blocksize = FLAC__stream_encoder_get_blocksize(encoder); 2655 const FLAC__uint64 frame_first_sample = encoder->private_->samples_written; 2656 const FLAC__uint64 frame_last_sample = frame_first_sample + (FLAC__uint64)blocksize - 1; 2657 FLAC__uint64 test_sample; 2658 unsigned i; 2659 for(i = encoder->private_->first_seekpoint_to_check; i < encoder->private_->seek_table->num_points; i++) { 2660 test_sample = encoder->private_->seek_table->points[i].sample_number; 2661 if(test_sample > frame_last_sample) { 2662 break; 2663 } 2664 else if(test_sample >= frame_first_sample) { 2665 encoder->private_->seek_table->points[i].sample_number = frame_first_sample; 2666 encoder->private_->seek_table->points[i].stream_offset = output_position - encoder->protected_->audio_offset; 2667 encoder->private_->seek_table->points[i].frame_samples = blocksize; 2668 encoder->private_->first_seekpoint_to_check++; 2669 /* DO NOT: "break;" and here's why: 2670 * The seektable template may contain more than one target 2671 * sample for any given frame; we will keep looping, generating 2672 * duplicate seekpoints for them, and we'll clean it up later, 2673 * just before writing the seektable back to the metadata. 2674 */ 2675 } 2676 else { 2677 encoder->private_->first_seekpoint_to_check++; 2678 } 2679 } 2680 } 2681 2682#if FLAC__HAS_OGG 2683 if(encoder->private_->is_ogg) { 2684 status = FLAC__ogg_encoder_aspect_write_callback_wrapper( 2685 &encoder->protected_->ogg_encoder_aspect, 2686 buffer, 2687 bytes, 2688 samples, 2689 encoder->private_->current_frame_number, 2690 is_last_block, 2691 (FLAC__OggEncoderAspectWriteCallbackProxy)encoder->private_->write_callback, 2692 encoder, 2693 encoder->private_->client_data 2694 ); 2695 } 2696 else 2697#endif 2698 status = encoder->private_->write_callback(encoder, buffer, bytes, samples, encoder->private_->current_frame_number, encoder->private_->client_data); 2699 2700 if(status == FLAC__STREAM_ENCODER_WRITE_STATUS_OK) { 2701 encoder->private_->bytes_written += bytes; 2702 encoder->private_->samples_written += samples; 2703 /* we keep a high watermark on the number of frames written because 2704 * when the encoder goes back to write metadata, 'current_frame' 2705 * will drop back to 0. 2706 */ 2707 encoder->private_->frames_written = flac_max(encoder->private_->frames_written, encoder->private_->current_frame_number+1); 2708 } 2709 else 2710 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2711 2712 return status; 2713} 2714 2715/* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks. */ 2716void update_metadata_(const FLAC__StreamEncoder *encoder) 2717{ 2718 FLAC__byte b[flac_max(6u, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)]; 2719 const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo; 2720 const FLAC__uint64 samples = metadata->data.stream_info.total_samples; 2721 const unsigned min_framesize = metadata->data.stream_info.min_framesize; 2722 const unsigned max_framesize = metadata->data.stream_info.max_framesize; 2723 const unsigned bps = metadata->data.stream_info.bits_per_sample; 2724 FLAC__StreamEncoderSeekStatus seek_status; 2725 2726 FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO); 2727 2728 /* All this is based on intimate knowledge of the stream header 2729 * layout, but a change to the header format that would break this 2730 * would also break all streams encoded in the previous format. 2731 */ 2732 2733 /* 2734 * Write MD5 signature 2735 */ 2736 { 2737 const unsigned md5_offset = 2738 FLAC__STREAM_METADATA_HEADER_LENGTH + 2739 ( 2740 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN + 2741 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN + 2742 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN + 2743 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN + 2744 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN + 2745 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN + 2746 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN + 2747 FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN 2748 ) / 8; 2749 2750 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + md5_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) { 2751 if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR) 2752 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2753 return; 2754 } 2755 if(encoder->private_->write_callback(encoder, metadata->data.stream_info.md5sum, 16, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) { 2756 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2757 return; 2758 } 2759 } 2760 2761 /* 2762 * Write total samples 2763 */ 2764 { 2765 const unsigned total_samples_byte_offset = 2766 FLAC__STREAM_METADATA_HEADER_LENGTH + 2767 ( 2768 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN + 2769 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN + 2770 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN + 2771 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN + 2772 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN + 2773 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN + 2774 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN 2775 - 4 2776 ) / 8; 2777 2778 b[0] = ((FLAC__byte)(bps-1) << 4) | (FLAC__byte)((samples >> 32) & 0x0F); 2779 b[1] = (FLAC__byte)((samples >> 24) & 0xFF); 2780 b[2] = (FLAC__byte)((samples >> 16) & 0xFF); 2781 b[3] = (FLAC__byte)((samples >> 8) & 0xFF); 2782 b[4] = (FLAC__byte)(samples & 0xFF); 2783 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + total_samples_byte_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) { 2784 if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR) 2785 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2786 return; 2787 } 2788 if(encoder->private_->write_callback(encoder, b, 5, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) { 2789 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2790 return; 2791 } 2792 } 2793 2794 /* 2795 * Write min/max framesize 2796 */ 2797 { 2798 const unsigned min_framesize_offset = 2799 FLAC__STREAM_METADATA_HEADER_LENGTH + 2800 ( 2801 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN + 2802 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN 2803 ) / 8; 2804 2805 b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF); 2806 b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF); 2807 b[2] = (FLAC__byte)(min_framesize & 0xFF); 2808 b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF); 2809 b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF); 2810 b[5] = (FLAC__byte)(max_framesize & 0xFF); 2811 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->streaminfo_offset + min_framesize_offset, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) { 2812 if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR) 2813 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2814 return; 2815 } 2816 if(encoder->private_->write_callback(encoder, b, 6, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) { 2817 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2818 return; 2819 } 2820 } 2821 2822 /* 2823 * Write seektable 2824 */ 2825 if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) { 2826 unsigned i; 2827 2828 FLAC__format_seektable_sort(encoder->private_->seek_table); 2829 2830 FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table)); 2831 2832 if((seek_status = encoder->private_->seek_callback(encoder, encoder->protected_->seektable_offset + FLAC__STREAM_METADATA_HEADER_LENGTH, encoder->private_->client_data)) != FLAC__STREAM_ENCODER_SEEK_STATUS_OK) { 2833 if(seek_status == FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR) 2834 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2835 return; 2836 } 2837 2838 for(i = 0; i < encoder->private_->seek_table->num_points; i++) { 2839 FLAC__uint64 xx; 2840 unsigned x; 2841 xx = encoder->private_->seek_table->points[i].sample_number; 2842 b[7] = (FLAC__byte)xx; xx >>= 8; 2843 b[6] = (FLAC__byte)xx; xx >>= 8; 2844 b[5] = (FLAC__byte)xx; xx >>= 8; 2845 b[4] = (FLAC__byte)xx; xx >>= 8; 2846 b[3] = (FLAC__byte)xx; xx >>= 8; 2847 b[2] = (FLAC__byte)xx; xx >>= 8; 2848 b[1] = (FLAC__byte)xx; xx >>= 8; 2849 b[0] = (FLAC__byte)xx; xx >>= 8; 2850 xx = encoder->private_->seek_table->points[i].stream_offset; 2851 b[15] = (FLAC__byte)xx; xx >>= 8; 2852 b[14] = (FLAC__byte)xx; xx >>= 8; 2853 b[13] = (FLAC__byte)xx; xx >>= 8; 2854 b[12] = (FLAC__byte)xx; xx >>= 8; 2855 b[11] = (FLAC__byte)xx; xx >>= 8; 2856 b[10] = (FLAC__byte)xx; xx >>= 8; 2857 b[9] = (FLAC__byte)xx; xx >>= 8; 2858 b[8] = (FLAC__byte)xx; xx >>= 8; 2859 x = encoder->private_->seek_table->points[i].frame_samples; 2860 b[17] = (FLAC__byte)x; x >>= 8; 2861 b[16] = (FLAC__byte)x; x >>= 8; 2862 if(encoder->private_->write_callback(encoder, b, 18, 0, 0, encoder->private_->client_data) != FLAC__STREAM_ENCODER_WRITE_STATUS_OK) { 2863 encoder->protected_->state = FLAC__STREAM_ENCODER_CLIENT_ERROR; 2864 return; 2865 } 2866 } 2867 } 2868} 2869 2870#if FLAC__HAS_OGG 2871/* Gets called when the encoding process has finished so that we can update the STREAMINFO and SEEKTABLE blocks. */ 2872void update_ogg_metadata_(FLAC__StreamEncoder *encoder) 2873{ 2874 /* the # of bytes in the 1st packet that precede the STREAMINFO */ 2875 static const unsigned FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH = 2876 FLAC__OGG_MAPPING_PACKET_TYPE_LENGTH + 2877 FLAC__OGG_MAPPING_MAGIC_LENGTH + 2878 FLAC__OGG_MAPPING_VERSION_MAJOR_LENGTH + 2879 FLAC__OGG_MAPPING_VERSION_MINOR_LENGTH + 2880 FLAC__OGG_MAPPING_NUM_HEADERS_LENGTH + 2881 FLAC__STREAM_SYNC_LENGTH 2882 ; 2883 FLAC__byte b[flac_max(6u, FLAC__STREAM_METADATA_SEEKPOINT_LENGTH)]; 2884 const FLAC__StreamMetadata *metadata = &encoder->private_->streaminfo; 2885 const FLAC__uint64 samples = metadata->data.stream_info.total_samples; 2886 const unsigned min_framesize = metadata->data.stream_info.min_framesize; 2887 const unsigned max_framesize = metadata->data.stream_info.max_framesize; 2888 ogg_page page; 2889 2890 FLAC__ASSERT(metadata->type == FLAC__METADATA_TYPE_STREAMINFO); 2891 FLAC__ASSERT(0 != encoder->private_->seek_callback); 2892 2893 /* Pre-check that client supports seeking, since we don't want the 2894 * ogg_helper code to ever have to deal with this condition. 2895 */ 2896 if(encoder->private_->seek_callback(encoder, 0, encoder->private_->client_data) == FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED) 2897 return; 2898 2899 /* All this is based on intimate knowledge of the stream header 2900 * layout, but a change to the header format that would break this 2901 * would also break all streams encoded in the previous format. 2902 */ 2903 2904 /** 2905 ** Write STREAMINFO stats 2906 **/ 2907 simple_ogg_page__init(&page); 2908 if(!simple_ogg_page__get_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) { 2909 simple_ogg_page__clear(&page); 2910 return; /* state already set */ 2911 } 2912 2913 /* 2914 * Write MD5 signature 2915 */ 2916 { 2917 const unsigned md5_offset = 2918 FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH + 2919 FLAC__STREAM_METADATA_HEADER_LENGTH + 2920 ( 2921 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN + 2922 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN + 2923 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN + 2924 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN + 2925 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN + 2926 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN + 2927 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN + 2928 FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN 2929 ) / 8; 2930 2931 if(md5_offset + 16 > (unsigned)page.body_len) { 2932 encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR; 2933 simple_ogg_page__clear(&page); 2934 return; 2935 } 2936 memcpy(page.body + md5_offset, metadata->data.stream_info.md5sum, 16); 2937 } 2938 2939 /* 2940 * Write total samples 2941 */ 2942 { 2943 const unsigned total_samples_byte_offset = 2944 FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH + 2945 FLAC__STREAM_METADATA_HEADER_LENGTH + 2946 ( 2947 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN + 2948 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN + 2949 FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN + 2950 FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN + 2951 FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN + 2952 FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN + 2953 FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN 2954 - 4 2955 ) / 8; 2956 2957 if(total_samples_byte_offset + 5 > (unsigned)page.body_len) { 2958 encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR; 2959 simple_ogg_page__clear(&page); 2960 return; 2961 } 2962 b[0] = (FLAC__byte)page.body[total_samples_byte_offset] & 0xF0; 2963 b[0] |= (FLAC__byte)((samples >> 32) & 0x0F); 2964 b[1] = (FLAC__byte)((samples >> 24) & 0xFF); 2965 b[2] = (FLAC__byte)((samples >> 16) & 0xFF); 2966 b[3] = (FLAC__byte)((samples >> 8) & 0xFF); 2967 b[4] = (FLAC__byte)(samples & 0xFF); 2968 memcpy(page.body + total_samples_byte_offset, b, 5); 2969 } 2970 2971 /* 2972 * Write min/max framesize 2973 */ 2974 { 2975 const unsigned min_framesize_offset = 2976 FIRST_OGG_PACKET_STREAMINFO_PREFIX_LENGTH + 2977 FLAC__STREAM_METADATA_HEADER_LENGTH + 2978 ( 2979 FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN + 2980 FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN 2981 ) / 8; 2982 2983 if(min_framesize_offset + 6 > (unsigned)page.body_len) { 2984 encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR; 2985 simple_ogg_page__clear(&page); 2986 return; 2987 } 2988 b[0] = (FLAC__byte)((min_framesize >> 16) & 0xFF); 2989 b[1] = (FLAC__byte)((min_framesize >> 8) & 0xFF); 2990 b[2] = (FLAC__byte)(min_framesize & 0xFF); 2991 b[3] = (FLAC__byte)((max_framesize >> 16) & 0xFF); 2992 b[4] = (FLAC__byte)((max_framesize >> 8) & 0xFF); 2993 b[5] = (FLAC__byte)(max_framesize & 0xFF); 2994 memcpy(page.body + min_framesize_offset, b, 6); 2995 } 2996 if(!simple_ogg_page__set_at(encoder, encoder->protected_->streaminfo_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) { 2997 simple_ogg_page__clear(&page); 2998 return; /* state already set */ 2999 } 3000 simple_ogg_page__clear(&page); 3001 3002 /* 3003 * Write seektable 3004 */ 3005 if(0 != encoder->private_->seek_table && encoder->private_->seek_table->num_points > 0 && encoder->protected_->seektable_offset > 0) { 3006 unsigned i; 3007 FLAC__byte *p; 3008 3009 FLAC__format_seektable_sort(encoder->private_->seek_table); 3010 3011 FLAC__ASSERT(FLAC__format_seektable_is_legal(encoder->private_->seek_table)); 3012 3013 simple_ogg_page__init(&page); 3014 if(!simple_ogg_page__get_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->read_callback, encoder->private_->client_data)) { 3015 simple_ogg_page__clear(&page); 3016 return; /* state already set */ 3017 } 3018 3019 if((FLAC__STREAM_METADATA_HEADER_LENGTH + 18*encoder->private_->seek_table->num_points) != (unsigned)page.body_len) { 3020 encoder->protected_->state = FLAC__STREAM_ENCODER_OGG_ERROR; 3021 simple_ogg_page__clear(&page); 3022 return; 3023 } 3024 3025 for(i = 0, p = page.body + FLAC__STREAM_METADATA_HEADER_LENGTH; i < encoder->private_->seek_table->num_points; i++, p += 18) { 3026 FLAC__uint64 xx; 3027 unsigned x; 3028 xx = encoder->private_->seek_table->points[i].sample_number; 3029 b[7] = (FLAC__byte)xx; xx >>= 8; 3030 b[6] = (FLAC__byte)xx; xx >>= 8; 3031 b[5] = (FLAC__byte)xx; xx >>= 8; 3032 b[4] = (FLAC__byte)xx; xx >>= 8; 3033 b[3] = (FLAC__byte)xx; xx >>= 8; 3034 b[2] = (FLAC__byte)xx; xx >>= 8; 3035 b[1] = (FLAC__byte)xx; xx >>= 8; 3036 b[0] = (FLAC__byte)xx; xx >>= 8; 3037 xx = encoder->private_->seek_table->points[i].stream_offset; 3038 b[15] = (FLAC__byte)xx; xx >>= 8; 3039 b[14] = (FLAC__byte)xx; xx >>= 8; 3040 b[13] = (FLAC__byte)xx; xx >>= 8; 3041 b[12] = (FLAC__byte)xx; xx >>= 8; 3042 b[11] = (FLAC__byte)xx; xx >>= 8; 3043 b[10] = (FLAC__byte)xx; xx >>= 8; 3044 b[9] = (FLAC__byte)xx; xx >>= 8; 3045 b[8] = (FLAC__byte)xx; xx >>= 8; 3046 x = encoder->private_->seek_table->points[i].frame_samples; 3047 b[17] = (FLAC__byte)x; x >>= 8; 3048 b[16] = (FLAC__byte)x; x >>= 8; 3049 memcpy(p, b, 18); 3050 } 3051 3052 if(!simple_ogg_page__set_at(encoder, encoder->protected_->seektable_offset, &page, encoder->private_->seek_callback, encoder->private_->write_callback, encoder->private_->client_data)) { 3053 simple_ogg_page__clear(&page); 3054 return; /* state already set */ 3055 } 3056 simple_ogg_page__clear(&page); 3057 } 3058} 3059#endif 3060 3061FLAC__bool process_frame_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block, FLAC__bool is_last_block) 3062{ 3063 FLAC__uint16 crc; 3064 FLAC__ASSERT(encoder->protected_->state == FLAC__STREAM_ENCODER_OK); 3065 3066 /* 3067 * Accumulate raw signal to the MD5 signature 3068 */ 3069 if(encoder->protected_->do_md5 && !FLAC__MD5Accumulate(&encoder->private_->md5context, (const FLAC__int32 * const *)encoder->private_->integer_signal, encoder->protected_->channels, encoder->protected_->blocksize, (encoder->protected_->bits_per_sample+7) / 8)) { 3070 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; 3071 return false; 3072 } 3073 3074 /* 3075 * Process the frame header and subframes into the frame bitbuffer 3076 */ 3077 if(!process_subframes_(encoder, is_fractional_block)) { 3078 /* the above function sets the state for us in case of an error */ 3079 return false; 3080 } 3081 3082 /* 3083 * Zero-pad the frame to a byte_boundary 3084 */ 3085 if(!FLAC__bitwriter_zero_pad_to_byte_boundary(encoder->private_->frame)) { 3086 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; 3087 return false; 3088 } 3089 3090 /* 3091 * CRC-16 the whole thing 3092 */ 3093 FLAC__ASSERT(FLAC__bitwriter_is_byte_aligned(encoder->private_->frame)); 3094 if( 3095 !FLAC__bitwriter_get_write_crc16(encoder->private_->frame, &crc) || 3096 !FLAC__bitwriter_write_raw_uint32(encoder->private_->frame, crc, FLAC__FRAME_FOOTER_CRC_LEN) 3097 ) { 3098 encoder->protected_->state = FLAC__STREAM_ENCODER_MEMORY_ALLOCATION_ERROR; 3099 return false; 3100 } 3101 3102 /* 3103 * Write it 3104 */ 3105 if(!write_bitbuffer_(encoder, encoder->protected_->blocksize, is_last_block)) { 3106 /* the above function sets the state for us in case of an error */ 3107 return false; 3108 } 3109 3110 /* 3111 * Get ready for the next frame 3112 */ 3113 encoder->private_->current_sample_number = 0; 3114 encoder->private_->current_frame_number++; 3115 encoder->private_->streaminfo.data.stream_info.total_samples += (FLAC__uint64)encoder->protected_->blocksize; 3116 3117 return true; 3118} 3119 3120FLAC__bool process_subframes_(FLAC__StreamEncoder *encoder, FLAC__bool is_fractional_block) 3121{ 3122 FLAC__FrameHeader frame_header; 3123 unsigned channel, min_partition_order = encoder->protected_->min_residual_partition_order, max_partition_order; 3124 FLAC__bool do_independent, do_mid_side; 3125 3126 /* 3127 * Calculate the min,max Rice partition orders 3128 */ 3129 if(is_fractional_block) { 3130 max_partition_order = 0; 3131 } 3132 else { 3133 max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize(encoder->protected_->blocksize); 3134 max_partition_order = flac_min(max_partition_order, encoder->protected_->max_residual_partition_order); 3135 } 3136 min_partition_order = flac_min(min_partition_order, max_partition_order); 3137 3138 /* 3139 * Setup the frame 3140 */ 3141 frame_header.blocksize = encoder->protected_->blocksize; 3142 frame_header.sample_rate = encoder->protected_->sample_rate; 3143 frame_header.channels = encoder->protected_->channels; 3144 frame_header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; /* the default unless the encoder determines otherwise */ 3145 frame_header.bits_per_sample = encoder->protected_->bits_per_sample; 3146 frame_header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER; 3147 frame_header.number.frame_number = encoder->private_->current_frame_number; 3148 3149 /* 3150 * Figure out what channel assignments to try 3151 */ 3152 if(encoder->protected_->do_mid_side_stereo) { 3153 if(encoder->protected_->loose_mid_side_stereo) { 3154 if(encoder->private_->loose_mid_side_stereo_frame_count == 0) { 3155 do_independent = true; 3156 do_mid_side = true; 3157 } 3158 else { 3159 do_independent = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT); 3160 do_mid_side = !do_independent; 3161 } 3162 } 3163 else { 3164 do_independent = true; 3165 do_mid_side = true; 3166 } 3167 } 3168 else { 3169 do_independent = true; 3170 do_mid_side = false; 3171 } 3172 3173 FLAC__ASSERT(do_independent || do_mid_side); 3174 3175 /* 3176 * Check for wasted bits; set effective bps for each subframe 3177 */ 3178 if(do_independent) { 3179 for(channel = 0; channel < encoder->protected_->channels; channel++) { 3180 const unsigned w = get_wasted_bits_(encoder->private_->integer_signal[channel], encoder->protected_->blocksize); 3181 encoder->private_->subframe_workspace[channel][0].wasted_bits = encoder->private_->subframe_workspace[channel][1].wasted_bits = w; 3182 encoder->private_->subframe_bps[channel] = encoder->protected_->bits_per_sample - w; 3183 } 3184 } 3185 if(do_mid_side) { 3186 FLAC__ASSERT(encoder->protected_->channels == 2); 3187 for(channel = 0; channel < 2; channel++) { 3188 const unsigned w = get_wasted_bits_(encoder->private_->integer_signal_mid_side[channel], encoder->protected_->blocksize); 3189 encoder->private_->subframe_workspace_mid_side[channel][0].wasted_bits = encoder->private_->subframe_workspace_mid_side[channel][1].wasted_bits = w; 3190 encoder->private_->subframe_bps_mid_side[channel] = encoder->protected_->bits_per_sample - w + (channel==0? 0:1); 3191 } 3192 } 3193 3194 /* 3195 * First do a normal encoding pass of each independent channel 3196 */ 3197 if(do_independent) { 3198 for(channel = 0; channel < encoder->protected_->channels; channel++) { 3199 if(! 3200 process_subframe_( 3201 encoder, 3202 min_partition_order, 3203 max_partition_order, 3204 &frame_header, 3205 encoder->private_->subframe_bps[channel], 3206 encoder->private_->integer_signal[channel], 3207 encoder->private_->subframe_workspace_ptr[channel], 3208 encoder->private_->partitioned_rice_contents_workspace_ptr[channel], 3209 encoder->private_->residual_workspace[channel], 3210 encoder->private_->best_subframe+channel, 3211 encoder->private_->best_subframe_bits+channel 3212 ) 3213 ) 3214 return false; 3215 } 3216 } 3217 3218 /* 3219 * Now do mid and side channels if requested 3220 */ 3221 if(do_mid_side) { 3222 FLAC__ASSERT(encoder->protected_->channels == 2); 3223 3224 for(channel = 0; channel < 2; channel++) { 3225 if(! 3226 process_subframe_( 3227 encoder, 3228 min_partition_order, 3229 max_partition_order, 3230 &frame_header, 3231 encoder->private_->subframe_bps_mid_side[channel], 3232 encoder->private_->integer_signal_mid_side[channel], 3233 encoder->private_->subframe_workspace_ptr_mid_side[channel], 3234 encoder->private_->partitioned_rice_contents_workspace_ptr_mid_side[channel], 3235 encoder->private_->residual_workspace_mid_side[channel], 3236 encoder->private_->best_subframe_mid_side+channel, 3237 encoder->private_->best_subframe_bits_mid_side+channel 3238 ) 3239 ) 3240 return false; 3241 } 3242 } 3243 3244 /* 3245 * Compose the frame bitbuffer 3246 */ 3247 if(do_mid_side) { 3248 unsigned left_bps = 0, right_bps = 0; /* initialized only to prevent superfluous compiler warning */ 3249 FLAC__Subframe *left_subframe = 0, *right_subframe = 0; /* initialized only to prevent superfluous compiler warning */ 3250 FLAC__ChannelAssignment channel_assignment; 3251 3252 FLAC__ASSERT(encoder->protected_->channels == 2); 3253 3254 if(encoder->protected_->loose_mid_side_stereo && encoder->private_->loose_mid_side_stereo_frame_count > 0) { 3255 channel_assignment = (encoder->private_->last_channel_assignment == FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT? FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT : FLAC__CHANNEL_ASSIGNMENT_MID_SIDE); 3256 } 3257 else { 3258 unsigned bits[4]; /* WATCHOUT - indexed by FLAC__ChannelAssignment */ 3259 unsigned min_bits; 3260 int ca; 3261 3262 FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT == 0); 3263 FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE == 1); 3264 FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE == 2); 3265 FLAC__ASSERT(FLAC__CHANNEL_ASSIGNMENT_MID_SIDE == 3); 3266 FLAC__ASSERT(do_independent && do_mid_side); 3267 3268 /* We have to figure out which channel assignent results in the smallest frame */ 3269 bits[FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits [1]; 3270 bits[FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE ] = encoder->private_->best_subframe_bits [0] + encoder->private_->best_subframe_bits_mid_side[1]; 3271 bits[FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE ] = encoder->private_->best_subframe_bits [1] + encoder->private_->best_subframe_bits_mid_side[1]; 3272 bits[FLAC__CHANNEL_ASSIGNMENT_MID_SIDE ] = encoder->private_->best_subframe_bits_mid_side[0] + encoder->private_->best_subframe_bits_mid_side[1]; 3273 3274 channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; 3275 min_bits = bits[channel_assignment]; 3276 for(ca = 1; ca <= 3; ca++) { 3277 if(bits[ca] < min_bits) { 3278 min_bits = bits[ca]; 3279 channel_assignment = (FLAC__ChannelAssignment)ca; 3280 } 3281 } 3282 } 3283 3284 frame_header.channel_assignment = channel_assignment; 3285 3286 if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) { 3287 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 3288 return false; 3289 } 3290 3291 switch(channel_assignment) { 3292 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: 3293 left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]]; 3294 right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]]; 3295 break; 3296 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: 3297 left_subframe = &encoder->private_->subframe_workspace [0][encoder->private_->best_subframe [0]]; 3298 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]]; 3299 break; 3300 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: 3301 left_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]]; 3302 right_subframe = &encoder->private_->subframe_workspace [1][encoder->private_->best_subframe [1]]; 3303 break; 3304 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: 3305 left_subframe = &encoder->private_->subframe_workspace_mid_side[0][encoder->private_->best_subframe_mid_side[0]]; 3306 right_subframe = &encoder->private_->subframe_workspace_mid_side[1][encoder->private_->best_subframe_mid_side[1]]; 3307 break; 3308 default: 3309 FLAC__ASSERT(0); 3310 } 3311 3312 switch(channel_assignment) { 3313 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: 3314 left_bps = encoder->private_->subframe_bps [0]; 3315 right_bps = encoder->private_->subframe_bps [1]; 3316 break; 3317 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: 3318 left_bps = encoder->private_->subframe_bps [0]; 3319 right_bps = encoder->private_->subframe_bps_mid_side[1]; 3320 break; 3321 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: 3322 left_bps = encoder->private_->subframe_bps_mid_side[1]; 3323 right_bps = encoder->private_->subframe_bps [1]; 3324 break; 3325 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: 3326 left_bps = encoder->private_->subframe_bps_mid_side[0]; 3327 right_bps = encoder->private_->subframe_bps_mid_side[1]; 3328 break; 3329 default: 3330 FLAC__ASSERT(0); 3331 } 3332 3333 /* note that encoder_add_subframe_ sets the state for us in case of an error */ 3334 if(!add_subframe_(encoder, frame_header.blocksize, left_bps , left_subframe , encoder->private_->frame)) 3335 return false; 3336 if(!add_subframe_(encoder, frame_header.blocksize, right_bps, right_subframe, encoder->private_->frame)) 3337 return false; 3338 } 3339 else { 3340 if(!FLAC__frame_add_header(&frame_header, encoder->private_->frame)) { 3341 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 3342 return false; 3343 } 3344 3345 for(channel = 0; channel < encoder->protected_->channels; channel++) { 3346 if(!add_subframe_(encoder, frame_header.blocksize, encoder->private_->subframe_bps[channel], &encoder->private_->subframe_workspace[channel][encoder->private_->best_subframe[channel]], encoder->private_->frame)) { 3347 /* the above function sets the state for us in case of an error */ 3348 return false; 3349 } 3350 } 3351 } 3352 3353 if(encoder->protected_->loose_mid_side_stereo) { 3354 encoder->private_->loose_mid_side_stereo_frame_count++; 3355 if(encoder->private_->loose_mid_side_stereo_frame_count >= encoder->private_->loose_mid_side_stereo_frames) 3356 encoder->private_->loose_mid_side_stereo_frame_count = 0; 3357 } 3358 3359 encoder->private_->last_channel_assignment = frame_header.channel_assignment; 3360 3361 return true; 3362} 3363 3364FLAC__bool process_subframe_( 3365 FLAC__StreamEncoder *encoder, 3366 unsigned min_partition_order, 3367 unsigned max_partition_order, 3368 const FLAC__FrameHeader *frame_header, 3369 unsigned subframe_bps, 3370 const FLAC__int32 integer_signal[], 3371 FLAC__Subframe *subframe[2], 3372 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents[2], 3373 FLAC__int32 *residual[2], 3374 unsigned *best_subframe, 3375 unsigned *best_bits 3376) 3377{ 3378#ifndef FLAC__INTEGER_ONLY_LIBRARY 3379 FLAC__float fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]; 3380#else 3381 FLAC__fixedpoint fixed_residual_bits_per_sample[FLAC__MAX_FIXED_ORDER+1]; 3382#endif 3383#ifndef FLAC__INTEGER_ONLY_LIBRARY 3384 FLAC__double lpc_residual_bits_per_sample; 3385 FLAC__real autoc[FLAC__MAX_LPC_ORDER+1]; /* WATCHOUT: the size is important even though encoder->protected_->max_lpc_order might be less; some asm and x86 intrinsic routines need all the space */ 3386 FLAC__double lpc_error[FLAC__MAX_LPC_ORDER]; 3387 unsigned min_lpc_order, max_lpc_order, lpc_order; 3388 unsigned min_qlp_coeff_precision, max_qlp_coeff_precision, qlp_coeff_precision; 3389#endif 3390 unsigned min_fixed_order, max_fixed_order, guess_fixed_order, fixed_order; 3391 unsigned rice_parameter; 3392 unsigned _candidate_bits, _best_bits; 3393 unsigned _best_subframe; 3394 /* only use RICE2 partitions if stream bps > 16 */ 3395 const unsigned rice_parameter_limit = FLAC__stream_encoder_get_bits_per_sample(encoder) > 16? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER; 3396 3397 FLAC__ASSERT(frame_header->blocksize > 0); 3398 3399 /* verbatim subframe is the baseline against which we measure other compressed subframes */ 3400 _best_subframe = 0; 3401 if(encoder->private_->disable_verbatim_subframes && frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) 3402 _best_bits = UINT_MAX; 3403 else 3404 _best_bits = evaluate_verbatim_subframe_(encoder, integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]); 3405 3406 if(frame_header->blocksize >= FLAC__MAX_FIXED_ORDER) { 3407 unsigned signal_is_constant = false; 3408 guess_fixed_order = encoder->private_->local_fixed_compute_best_predictor(integer_signal+FLAC__MAX_FIXED_ORDER, frame_header->blocksize-FLAC__MAX_FIXED_ORDER, fixed_residual_bits_per_sample); 3409 /* check for constant subframe */ 3410 if( 3411 !encoder->private_->disable_constant_subframes && 3412#ifndef FLAC__INTEGER_ONLY_LIBRARY 3413 fixed_residual_bits_per_sample[1] == 0.0 3414#else 3415 fixed_residual_bits_per_sample[1] == FLAC__FP_ZERO 3416#endif 3417 ) { 3418 /* the above means it's possible all samples are the same value; now double-check it: */ 3419 unsigned i; 3420 signal_is_constant = true; 3421 for(i = 1; i < frame_header->blocksize; i++) { 3422 if(integer_signal[0] != integer_signal[i]) { 3423 signal_is_constant = false; 3424 break; 3425 } 3426 } 3427 } 3428 if(signal_is_constant) { 3429 _candidate_bits = evaluate_constant_subframe_(encoder, integer_signal[0], frame_header->blocksize, subframe_bps, subframe[!_best_subframe]); 3430 if(_candidate_bits < _best_bits) { 3431 _best_subframe = !_best_subframe; 3432 _best_bits = _candidate_bits; 3433 } 3434 } 3435 else { 3436 if(!encoder->private_->disable_fixed_subframes || (encoder->protected_->max_lpc_order == 0 && _best_bits == UINT_MAX)) { 3437 /* encode fixed */ 3438 if(encoder->protected_->do_exhaustive_model_search) { 3439 min_fixed_order = 0; 3440 max_fixed_order = FLAC__MAX_FIXED_ORDER; 3441 } 3442 else { 3443 min_fixed_order = max_fixed_order = guess_fixed_order; 3444 } 3445 if(max_fixed_order >= frame_header->blocksize) 3446 max_fixed_order = frame_header->blocksize - 1; 3447 for(fixed_order = min_fixed_order; fixed_order <= max_fixed_order; fixed_order++) { 3448#ifndef FLAC__INTEGER_ONLY_LIBRARY 3449 if(fixed_residual_bits_per_sample[fixed_order] >= (FLAC__float)subframe_bps) 3450 continue; /* don't even try */ 3451 rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > 0.0)? (unsigned)(fixed_residual_bits_per_sample[fixed_order]+0.5) : 0; /* 0.5 is for rounding */ 3452#else 3453 if(FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]) >= (int)subframe_bps) 3454 continue; /* don't even try */ 3455 rice_parameter = (fixed_residual_bits_per_sample[fixed_order] > FLAC__FP_ZERO)? (unsigned)FLAC__fixedpoint_trunc(fixed_residual_bits_per_sample[fixed_order]+FLAC__FP_ONE_HALF) : 0; /* 0.5 is for rounding */ 3456#endif 3457 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */ 3458 if(rice_parameter >= rice_parameter_limit) { 3459#ifdef DEBUG_VERBOSE 3460 fprintf(stderr, "clipping rice_parameter (%u -> %u) @0\n", rice_parameter, rice_parameter_limit - 1); 3461#endif 3462 rice_parameter = rice_parameter_limit - 1; 3463 } 3464 _candidate_bits = 3465 evaluate_fixed_subframe_( 3466 encoder, 3467 integer_signal, 3468 residual[!_best_subframe], 3469 encoder->private_->abs_residual_partition_sums, 3470 encoder->private_->raw_bits_per_partition, 3471 frame_header->blocksize, 3472 subframe_bps, 3473 fixed_order, 3474 rice_parameter, 3475 rice_parameter_limit, 3476 min_partition_order, 3477 max_partition_order, 3478 encoder->protected_->do_escape_coding, 3479 encoder->protected_->rice_parameter_search_dist, 3480 subframe[!_best_subframe], 3481 partitioned_rice_contents[!_best_subframe] 3482 ); 3483 if(_candidate_bits < _best_bits) { 3484 _best_subframe = !_best_subframe; 3485 _best_bits = _candidate_bits; 3486 } 3487 } 3488 } 3489 3490#ifndef FLAC__INTEGER_ONLY_LIBRARY 3491 /* encode lpc */ 3492 if(encoder->protected_->max_lpc_order > 0) { 3493 if(encoder->protected_->max_lpc_order >= frame_header->blocksize) 3494 max_lpc_order = frame_header->blocksize-1; 3495 else 3496 max_lpc_order = encoder->protected_->max_lpc_order; 3497 if(max_lpc_order > 0) { 3498 unsigned a; 3499 for (a = 0; a < encoder->protected_->num_apodizations; a++) { 3500 FLAC__lpc_window_data(integer_signal, encoder->private_->window[a], encoder->private_->windowed_signal, frame_header->blocksize); 3501 encoder->private_->local_lpc_compute_autocorrelation(encoder->private_->windowed_signal, frame_header->blocksize, max_lpc_order+1, autoc); 3502 /* if autoc[0] == 0.0, the signal is constant and we usually won't get here, but it can happen */ 3503 if(autoc[0] != 0.0) { 3504 FLAC__lpc_compute_lp_coefficients(autoc, &max_lpc_order, encoder->private_->lp_coeff, lpc_error); 3505 if(encoder->protected_->do_exhaustive_model_search) { 3506 min_lpc_order = 1; 3507 } 3508 else { 3509 const unsigned guess_lpc_order = 3510 FLAC__lpc_compute_best_order( 3511 lpc_error, 3512 max_lpc_order, 3513 frame_header->blocksize, 3514 subframe_bps + ( 3515 encoder->protected_->do_qlp_coeff_prec_search? 3516 FLAC__MIN_QLP_COEFF_PRECISION : /* have to guess; use the min possible size to avoid accidentally favoring lower orders */ 3517 encoder->protected_->qlp_coeff_precision 3518 ) 3519 ); 3520 min_lpc_order = max_lpc_order = guess_lpc_order; 3521 } 3522 if(max_lpc_order >= frame_header->blocksize) 3523 max_lpc_order = frame_header->blocksize - 1; 3524 for(lpc_order = min_lpc_order; lpc_order <= max_lpc_order; lpc_order++) { 3525 lpc_residual_bits_per_sample = FLAC__lpc_compute_expected_bits_per_residual_sample(lpc_error[lpc_order-1], frame_header->blocksize-lpc_order); 3526 if(lpc_residual_bits_per_sample >= (FLAC__double)subframe_bps) 3527 continue; /* don't even try */ 3528 rice_parameter = (lpc_residual_bits_per_sample > 0.0)? (unsigned)(lpc_residual_bits_per_sample+0.5) : 0; /* 0.5 is for rounding */ 3529 rice_parameter++; /* to account for the signed->unsigned conversion during rice coding */ 3530 if(rice_parameter >= rice_parameter_limit) { 3531#ifdef DEBUG_VERBOSE 3532 fprintf(stderr, "clipping rice_parameter (%u -> %u) @1\n", rice_parameter, rice_parameter_limit - 1); 3533#endif 3534 rice_parameter = rice_parameter_limit - 1; 3535 } 3536 if(encoder->protected_->do_qlp_coeff_prec_search) { 3537 min_qlp_coeff_precision = FLAC__MIN_QLP_COEFF_PRECISION; 3538 /* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */ 3539 if(subframe_bps <= 16) { 3540 max_qlp_coeff_precision = flac_min(32 - subframe_bps - FLAC__bitmath_ilog2(lpc_order), FLAC__MAX_QLP_COEFF_PRECISION); 3541 max_qlp_coeff_precision = flac_max(max_qlp_coeff_precision, min_qlp_coeff_precision); 3542 } 3543 else 3544 max_qlp_coeff_precision = FLAC__MAX_QLP_COEFF_PRECISION; 3545 } 3546 else { 3547 min_qlp_coeff_precision = max_qlp_coeff_precision = encoder->protected_->qlp_coeff_precision; 3548 } 3549 for(qlp_coeff_precision = min_qlp_coeff_precision; qlp_coeff_precision <= max_qlp_coeff_precision; qlp_coeff_precision++) { 3550 _candidate_bits = 3551 evaluate_lpc_subframe_( 3552 encoder, 3553 integer_signal, 3554 residual[!_best_subframe], 3555 encoder->private_->abs_residual_partition_sums, 3556 encoder->private_->raw_bits_per_partition, 3557 encoder->private_->lp_coeff[lpc_order-1], 3558 frame_header->blocksize, 3559 subframe_bps, 3560 lpc_order, 3561 qlp_coeff_precision, 3562 rice_parameter, 3563 rice_parameter_limit, 3564 min_partition_order, 3565 max_partition_order, 3566 encoder->protected_->do_escape_coding, 3567 encoder->protected_->rice_parameter_search_dist, 3568 subframe[!_best_subframe], 3569 partitioned_rice_contents[!_best_subframe] 3570 ); 3571 if(_candidate_bits > 0) { /* if == 0, there was a problem quantizing the lpcoeffs */ 3572 if(_candidate_bits < _best_bits) { 3573 _best_subframe = !_best_subframe; 3574 _best_bits = _candidate_bits; 3575 } 3576 } 3577 } 3578 } 3579 } 3580 } 3581 } 3582 } 3583#endif /* !defined FLAC__INTEGER_ONLY_LIBRARY */ 3584 } 3585 } 3586 3587 /* under rare circumstances this can happen when all but lpc subframe types are disabled: */ 3588 if(_best_bits == UINT_MAX) { 3589 FLAC__ASSERT(_best_subframe == 0); 3590 _best_bits = evaluate_verbatim_subframe_(encoder, integer_signal, frame_header->blocksize, subframe_bps, subframe[_best_subframe]); 3591 } 3592 3593 *best_subframe = _best_subframe; 3594 *best_bits = _best_bits; 3595 3596 return true; 3597} 3598 3599FLAC__bool add_subframe_( 3600 FLAC__StreamEncoder *encoder, 3601 unsigned blocksize, 3602 unsigned subframe_bps, 3603 const FLAC__Subframe *subframe, 3604 FLAC__BitWriter *frame 3605) 3606{ 3607 switch(subframe->type) { 3608 case FLAC__SUBFRAME_TYPE_CONSTANT: 3609 if(!FLAC__subframe_add_constant(&(subframe->data.constant), subframe_bps, subframe->wasted_bits, frame)) { 3610 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 3611 return false; 3612 } 3613 break; 3614 case FLAC__SUBFRAME_TYPE_FIXED: 3615 if(!FLAC__subframe_add_fixed(&(subframe->data.fixed), blocksize - subframe->data.fixed.order, subframe_bps, subframe->wasted_bits, frame)) { 3616 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 3617 return false; 3618 } 3619 break; 3620 case FLAC__SUBFRAME_TYPE_LPC: 3621 if(!FLAC__subframe_add_lpc(&(subframe->data.lpc), blocksize - subframe->data.lpc.order, subframe_bps, subframe->wasted_bits, frame)) { 3622 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 3623 return false; 3624 } 3625 break; 3626 case FLAC__SUBFRAME_TYPE_VERBATIM: 3627 if(!FLAC__subframe_add_verbatim(&(subframe->data.verbatim), blocksize, subframe_bps, subframe->wasted_bits, frame)) { 3628 encoder->protected_->state = FLAC__STREAM_ENCODER_FRAMING_ERROR; 3629 return false; 3630 } 3631 break; 3632 default: 3633 FLAC__ASSERT(0); 3634 } 3635 3636 return true; 3637} 3638 3639#define SPOTCHECK_ESTIMATE 0 3640#if SPOTCHECK_ESTIMATE 3641static void spotcheck_subframe_estimate_( 3642 FLAC__StreamEncoder *encoder, 3643 unsigned blocksize, 3644 unsigned subframe_bps, 3645 const FLAC__Subframe *subframe, 3646 unsigned estimate 3647) 3648{ 3649 FLAC__bool ret; 3650 FLAC__BitWriter *frame = FLAC__bitwriter_new(); 3651 if(frame == 0) { 3652 fprintf(stderr, "EST: can't allocate frame\n"); 3653 return; 3654 } 3655 if(!FLAC__bitwriter_init(frame)) { 3656 fprintf(stderr, "EST: can't init frame\n"); 3657 return; 3658 } 3659 ret = add_subframe_(encoder, blocksize, subframe_bps, subframe, frame); 3660 FLAC__ASSERT(ret); 3661 { 3662 const unsigned actual = FLAC__bitwriter_get_input_bits_unconsumed(frame); 3663 if(estimate != actual) 3664 fprintf(stderr, "EST: bad, frame#%u sub#%%d type=%8s est=%u, actual=%u, delta=%d\n", encoder->private_->current_frame_number, FLAC__SubframeTypeString[subframe->type], estimate, actual, (int)actual-(int)estimate); 3665 } 3666 FLAC__bitwriter_delete(frame); 3667} 3668#endif 3669 3670unsigned evaluate_constant_subframe_( 3671 FLAC__StreamEncoder *encoder, 3672 const FLAC__int32 signal, 3673 unsigned blocksize, 3674 unsigned subframe_bps, 3675 FLAC__Subframe *subframe 3676) 3677{ 3678 unsigned estimate; 3679 subframe->type = FLAC__SUBFRAME_TYPE_CONSTANT; 3680 subframe->data.constant.value = signal; 3681 3682 estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + subframe_bps; 3683 3684#if SPOTCHECK_ESTIMATE 3685 spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate); 3686#else 3687 (void)encoder, (void)blocksize; 3688#endif 3689 3690 return estimate; 3691} 3692 3693unsigned evaluate_fixed_subframe_( 3694 FLAC__StreamEncoder *encoder, 3695 const FLAC__int32 signal[], 3696 FLAC__int32 residual[], 3697 FLAC__uint64 abs_residual_partition_sums[], 3698 unsigned raw_bits_per_partition[], 3699 unsigned blocksize, 3700 unsigned subframe_bps, 3701 unsigned order, 3702 unsigned rice_parameter, 3703 unsigned rice_parameter_limit, 3704 unsigned min_partition_order, 3705 unsigned max_partition_order, 3706 FLAC__bool do_escape_coding, 3707 unsigned rice_parameter_search_dist, 3708 FLAC__Subframe *subframe, 3709 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents 3710) 3711{ 3712 unsigned i, residual_bits, estimate; 3713 const unsigned residual_samples = blocksize - order; 3714 3715 FLAC__fixed_compute_residual(signal+order, residual_samples, order, residual); 3716 3717 subframe->type = FLAC__SUBFRAME_TYPE_FIXED; 3718 3719 subframe->data.fixed.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE; 3720 subframe->data.fixed.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents; 3721 subframe->data.fixed.residual = residual; 3722 3723 residual_bits = 3724 find_best_partition_order_( 3725 encoder->private_, 3726 residual, 3727 abs_residual_partition_sums, 3728 raw_bits_per_partition, 3729 residual_samples, 3730 order, 3731 rice_parameter, 3732 rice_parameter_limit, 3733 min_partition_order, 3734 max_partition_order, 3735 subframe_bps, 3736 do_escape_coding, 3737 rice_parameter_search_dist, 3738 &subframe->data.fixed.entropy_coding_method 3739 ); 3740 3741 subframe->data.fixed.order = order; 3742 for(i = 0; i < order; i++) 3743 subframe->data.fixed.warmup[i] = signal[i]; 3744 3745 estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + (order * subframe_bps) + residual_bits; 3746 3747#if SPOTCHECK_ESTIMATE 3748 spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate); 3749#endif 3750 3751 return estimate; 3752} 3753 3754#ifndef FLAC__INTEGER_ONLY_LIBRARY 3755unsigned evaluate_lpc_subframe_( 3756 FLAC__StreamEncoder *encoder, 3757 const FLAC__int32 signal[], 3758 FLAC__int32 residual[], 3759 FLAC__uint64 abs_residual_partition_sums[], 3760 unsigned raw_bits_per_partition[], 3761 const FLAC__real lp_coeff[], 3762 unsigned blocksize, 3763 unsigned subframe_bps, 3764 unsigned order, 3765 unsigned qlp_coeff_precision, 3766 unsigned rice_parameter, 3767 unsigned rice_parameter_limit, 3768 unsigned min_partition_order, 3769 unsigned max_partition_order, 3770 FLAC__bool do_escape_coding, 3771 unsigned rice_parameter_search_dist, 3772 FLAC__Subframe *subframe, 3773 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents 3774) 3775{ 3776 FLAC__int32 qlp_coeff[FLAC__MAX_LPC_ORDER]; /* WATCHOUT: the size is important; some x86 intrinsic routines need more than lpc order elements */ 3777 unsigned i, residual_bits, estimate; 3778 int quantization, ret; 3779 const unsigned residual_samples = blocksize - order; 3780 3781 /* try to keep qlp coeff precision such that only 32-bit math is required for decode of <=16bps streams */ 3782 if(subframe_bps <= 16) { 3783 FLAC__ASSERT(order > 0); 3784 FLAC__ASSERT(order <= FLAC__MAX_LPC_ORDER); 3785 qlp_coeff_precision = flac_min(qlp_coeff_precision, 32 - subframe_bps - FLAC__bitmath_ilog2(order)); 3786 } 3787 3788 ret = FLAC__lpc_quantize_coefficients(lp_coeff, order, qlp_coeff_precision, qlp_coeff, &quantization); 3789 if(ret != 0) 3790 return 0; /* this is a hack to indicate to the caller that we can't do lp at this order on this subframe */ 3791 3792 if(subframe_bps + qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32) 3793 if(subframe_bps <= 16 && qlp_coeff_precision <= 16) 3794 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_16bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual); 3795 else 3796 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients(signal+order, residual_samples, qlp_coeff, order, quantization, residual); 3797 else 3798 encoder->private_->local_lpc_compute_residual_from_qlp_coefficients_64bit(signal+order, residual_samples, qlp_coeff, order, quantization, residual); 3799 3800 subframe->type = FLAC__SUBFRAME_TYPE_LPC; 3801 3802 subframe->data.lpc.entropy_coding_method.type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE; 3803 subframe->data.lpc.entropy_coding_method.data.partitioned_rice.contents = partitioned_rice_contents; 3804 subframe->data.lpc.residual = residual; 3805 3806 residual_bits = 3807 find_best_partition_order_( 3808 encoder->private_, 3809 residual, 3810 abs_residual_partition_sums, 3811 raw_bits_per_partition, 3812 residual_samples, 3813 order, 3814 rice_parameter, 3815 rice_parameter_limit, 3816 min_partition_order, 3817 max_partition_order, 3818 subframe_bps, 3819 do_escape_coding, 3820 rice_parameter_search_dist, 3821 &subframe->data.lpc.entropy_coding_method 3822 ); 3823 3824 subframe->data.lpc.order = order; 3825 subframe->data.lpc.qlp_coeff_precision = qlp_coeff_precision; 3826 subframe->data.lpc.quantization_level = quantization; 3827 memcpy(subframe->data.lpc.qlp_coeff, qlp_coeff, sizeof(FLAC__int32)*FLAC__MAX_LPC_ORDER); 3828 for(i = 0; i < order; i++) 3829 subframe->data.lpc.warmup[i] = signal[i]; 3830 3831 estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN + FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN + (order * (qlp_coeff_precision + subframe_bps)) + residual_bits; 3832 3833#if SPOTCHECK_ESTIMATE 3834 spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate); 3835#endif 3836 3837 return estimate; 3838} 3839#endif 3840 3841unsigned evaluate_verbatim_subframe_( 3842 FLAC__StreamEncoder *encoder, 3843 const FLAC__int32 signal[], 3844 unsigned blocksize, 3845 unsigned subframe_bps, 3846 FLAC__Subframe *subframe 3847) 3848{ 3849 unsigned estimate; 3850 3851 subframe->type = FLAC__SUBFRAME_TYPE_VERBATIM; 3852 3853 subframe->data.verbatim.data = signal; 3854 3855 estimate = FLAC__SUBFRAME_ZERO_PAD_LEN + FLAC__SUBFRAME_TYPE_LEN + FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN + subframe->wasted_bits + (blocksize * subframe_bps); 3856 3857#if SPOTCHECK_ESTIMATE 3858 spotcheck_subframe_estimate_(encoder, blocksize, subframe_bps, subframe, estimate); 3859#else 3860 (void)encoder; 3861#endif 3862 3863 return estimate; 3864} 3865 3866unsigned find_best_partition_order_( 3867 FLAC__StreamEncoderPrivate *private_, 3868 const FLAC__int32 residual[], 3869 FLAC__uint64 abs_residual_partition_sums[], 3870 unsigned raw_bits_per_partition[], 3871 unsigned residual_samples, 3872 unsigned predictor_order, 3873 unsigned rice_parameter, 3874 unsigned rice_parameter_limit, 3875 unsigned min_partition_order, 3876 unsigned max_partition_order, 3877 unsigned bps, 3878 FLAC__bool do_escape_coding, 3879 unsigned rice_parameter_search_dist, 3880 FLAC__EntropyCodingMethod *best_ecm 3881) 3882{ 3883 unsigned residual_bits, best_residual_bits = 0; 3884 unsigned best_parameters_index = 0; 3885 unsigned best_partition_order = 0; 3886 const unsigned blocksize = residual_samples + predictor_order; 3887 3888 max_partition_order = FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(max_partition_order, blocksize, predictor_order); 3889 min_partition_order = flac_min(min_partition_order, max_partition_order); 3890 3891 private_->local_precompute_partition_info_sums(residual, abs_residual_partition_sums, residual_samples, predictor_order, min_partition_order, max_partition_order, bps); 3892 3893 if(do_escape_coding) 3894 precompute_partition_info_escapes_(residual, raw_bits_per_partition, residual_samples, predictor_order, min_partition_order, max_partition_order); 3895 3896 { 3897 int partition_order; 3898 unsigned sum; 3899 3900 for(partition_order = (int)max_partition_order, sum = 0; partition_order >= (int)min_partition_order; partition_order--) { 3901 if(! 3902 set_partitioned_rice_( 3903#ifdef EXACT_RICE_BITS_CALCULATION 3904 residual, 3905#endif 3906 abs_residual_partition_sums+sum, 3907 raw_bits_per_partition+sum, 3908 residual_samples, 3909 predictor_order, 3910 rice_parameter, 3911 rice_parameter_limit, 3912 rice_parameter_search_dist, 3913 (unsigned)partition_order, 3914 do_escape_coding, 3915 &private_->partitioned_rice_contents_extra[!best_parameters_index], 3916 &residual_bits 3917 ) 3918 ) 3919 { 3920 FLAC__ASSERT(best_residual_bits != 0); 3921 break; 3922 } 3923 sum += 1u << partition_order; 3924 if(best_residual_bits == 0 || residual_bits < best_residual_bits) { 3925 best_residual_bits = residual_bits; 3926 best_parameters_index = !best_parameters_index; 3927 best_partition_order = partition_order; 3928 } 3929 } 3930 } 3931 3932 best_ecm->data.partitioned_rice.order = best_partition_order; 3933 3934 { 3935 /* 3936 * We are allowed to de-const the pointer based on our special 3937 * knowledge; it is const to the outside world. 3938 */ 3939 FLAC__EntropyCodingMethod_PartitionedRiceContents* prc = (FLAC__EntropyCodingMethod_PartitionedRiceContents*)best_ecm->data.partitioned_rice.contents; 3940 unsigned partition; 3941 3942 /* save best parameters and raw_bits */ 3943 FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(prc, flac_max(6u, best_partition_order)); 3944 memcpy(prc->parameters, private_->partitioned_rice_contents_extra[best_parameters_index].parameters, sizeof(unsigned)*(1<<(best_partition_order))); 3945 if(do_escape_coding) 3946 memcpy(prc->raw_bits, private_->partitioned_rice_contents_extra[best_parameters_index].raw_bits, sizeof(unsigned)*(1<<(best_partition_order))); 3947 /* 3948 * Now need to check if the type should be changed to 3949 * FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2 based on the 3950 * size of the rice parameters. 3951 */ 3952 for(partition = 0; partition < (1u<<best_partition_order); partition++) { 3953 if(prc->parameters[partition] >= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { 3954 best_ecm->type = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2; 3955 break; 3956 } 3957 } 3958 } 3959 3960 return best_residual_bits; 3961} 3962 3963void precompute_partition_info_sums_( 3964 const FLAC__int32 residual[], 3965 FLAC__uint64 abs_residual_partition_sums[], 3966 unsigned residual_samples, 3967 unsigned predictor_order, 3968 unsigned min_partition_order, 3969 unsigned max_partition_order, 3970 unsigned bps 3971) 3972{ 3973 const unsigned default_partition_samples = (residual_samples + predictor_order) >> max_partition_order; 3974 unsigned partitions = 1u << max_partition_order; 3975 3976 FLAC__ASSERT(default_partition_samples > predictor_order); 3977 3978 /* first do max_partition_order */ 3979 { 3980 unsigned partition, residual_sample, end = (unsigned)(-(int)predictor_order); 3981 /* WATCHOUT: "+ bps + FLAC__MAX_EXTRA_RESIDUAL_BPS" is the maximum 3982 * assumed size of the average residual magnitude */ 3983 if(FLAC__bitmath_ilog2(default_partition_samples) + bps + FLAC__MAX_EXTRA_RESIDUAL_BPS < 32) { 3984 FLAC__uint32 abs_residual_partition_sum; 3985 3986 for(partition = residual_sample = 0; partition < partitions; partition++) { 3987 end += default_partition_samples; 3988 abs_residual_partition_sum = 0; 3989 for( ; residual_sample < end; residual_sample++) 3990 abs_residual_partition_sum += abs(residual[residual_sample]); /* abs(INT_MIN) is undefined, but if the residual is INT_MIN we have bigger problems */ 3991 abs_residual_partition_sums[partition] = abs_residual_partition_sum; 3992 } 3993 } 3994 else { /* have to pessimistically use 64 bits for accumulator */ 3995 FLAC__uint64 abs_residual_partition_sum; 3996 3997 for(partition = residual_sample = 0; partition < partitions; partition++) { 3998 end += default_partition_samples; 3999 abs_residual_partition_sum = 0; 4000 for( ; residual_sample < end; residual_sample++) 4001 abs_residual_partition_sum += abs(residual[residual_sample]); /* abs(INT_MIN) is undefined, but if the residual is INT_MIN we have bigger problems */ 4002 abs_residual_partition_sums[partition] = abs_residual_partition_sum; 4003 } 4004 } 4005 } 4006 4007 /* now merge partitions for lower orders */ 4008 { 4009 unsigned from_partition = 0, to_partition = partitions; 4010 int partition_order; 4011 for(partition_order = (int)max_partition_order - 1; partition_order >= (int)min_partition_order; partition_order--) { 4012 unsigned i; 4013 partitions >>= 1; 4014 for(i = 0; i < partitions; i++) { 4015 abs_residual_partition_sums[to_partition++] = 4016 abs_residual_partition_sums[from_partition ] + 4017 abs_residual_partition_sums[from_partition+1]; 4018 from_partition += 2; 4019 } 4020 } 4021 } 4022} 4023 4024void precompute_partition_info_escapes_( 4025 const FLAC__int32 residual[], 4026 unsigned raw_bits_per_partition[], 4027 unsigned residual_samples, 4028 unsigned predictor_order, 4029 unsigned min_partition_order, 4030 unsigned max_partition_order 4031) 4032{ 4033 int partition_order; 4034 unsigned from_partition, to_partition = 0; 4035 const unsigned blocksize = residual_samples + predictor_order; 4036 4037 /* first do max_partition_order */ 4038 for(partition_order = (int)max_partition_order; partition_order >= 0; partition_order--) { 4039 FLAC__int32 r; 4040 FLAC__uint32 rmax; 4041 unsigned partition, partition_sample, partition_samples, residual_sample; 4042 const unsigned partitions = 1u << partition_order; 4043 const unsigned default_partition_samples = blocksize >> partition_order; 4044 4045 FLAC__ASSERT(default_partition_samples > predictor_order); 4046 4047 for(partition = residual_sample = 0; partition < partitions; partition++) { 4048 partition_samples = default_partition_samples; 4049 if(partition == 0) 4050 partition_samples -= predictor_order; 4051 rmax = 0; 4052 for(partition_sample = 0; partition_sample < partition_samples; partition_sample++) { 4053 r = residual[residual_sample++]; 4054 /* OPT: maybe faster: rmax |= r ^ (r>>31) */ 4055 if(r < 0) 4056 rmax |= ~r; 4057 else 4058 rmax |= r; 4059 } 4060 /* now we know all residual values are in the range [-rmax-1,rmax] */ 4061 raw_bits_per_partition[partition] = rmax? FLAC__bitmath_ilog2(rmax) + 2 : 1; 4062 } 4063 to_partition = partitions; 4064 break; /*@@@ yuck, should remove the 'for' loop instead */ 4065 } 4066 4067 /* now merge partitions for lower orders */ 4068 for(from_partition = 0, --partition_order; partition_order >= (int)min_partition_order; partition_order--) { 4069 unsigned m; 4070 unsigned i; 4071 const unsigned partitions = 1u << partition_order; 4072 for(i = 0; i < partitions; i++) { 4073 m = raw_bits_per_partition[from_partition]; 4074 from_partition++; 4075 raw_bits_per_partition[to_partition] = flac_max(m, raw_bits_per_partition[from_partition]); 4076 from_partition++; 4077 to_partition++; 4078 } 4079 } 4080} 4081 4082#ifdef EXACT_RICE_BITS_CALCULATION 4083static inline unsigned count_rice_bits_in_partition_( 4084 const unsigned rice_parameter, 4085 const unsigned partition_samples, 4086 const FLAC__int32 *residual 4087) 4088{ 4089 unsigned i, partition_bits = 4090 FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + /* actually could end up being FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN but err on side of 16bps */ 4091 (1+rice_parameter) * partition_samples /* 1 for unary stop bit + rice_parameter for the binary portion */ 4092 ; 4093 for(i = 0; i < partition_samples; i++) 4094 partition_bits += ( (FLAC__uint32)((residual[i]<<1)^(residual[i]>>31)) >> rice_parameter ); 4095 return partition_bits; 4096} 4097#else 4098static inline unsigned count_rice_bits_in_partition_( 4099 const unsigned rice_parameter, 4100 const unsigned partition_samples, 4101 const FLAC__uint64 abs_residual_partition_sum 4102) 4103{ 4104 return 4105 FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN + /* actually could end up being FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN but err on side of 16bps */ 4106 (1+rice_parameter) * partition_samples + /* 1 for unary stop bit + rice_parameter for the binary portion */ 4107 ( 4108 rice_parameter? 4109 (unsigned)(abs_residual_partition_sum >> (rice_parameter-1)) /* rice_parameter-1 because the real coder sign-folds instead of using a sign bit */ 4110 : (unsigned)(abs_residual_partition_sum << 1) /* can't shift by negative number, so reverse */ 4111 ) 4112 - (partition_samples >> 1) 4113 /* -(partition_samples>>1) to subtract out extra contributions to the abs_residual_partition_sum. 4114 * The actual number of bits used is closer to the sum(for all i in the partition) of abs(residual[i])>>(rice_parameter-1) 4115 * By using the abs_residual_partition sum, we also add in bits in the LSBs that would normally be shifted out. 4116 * So the subtraction term tries to guess how many extra bits were contributed. 4117 * If the LSBs are randomly distributed, this should average to 0.5 extra bits per sample. 4118 */ 4119 ; 4120} 4121#endif 4122 4123FLAC__bool set_partitioned_rice_( 4124#ifdef EXACT_RICE_BITS_CALCULATION 4125 const FLAC__int32 residual[], 4126#endif 4127 const FLAC__uint64 abs_residual_partition_sums[], 4128 const unsigned raw_bits_per_partition[], 4129 const unsigned residual_samples, 4130 const unsigned predictor_order, 4131 const unsigned suggested_rice_parameter, 4132 const unsigned rice_parameter_limit, 4133 const unsigned rice_parameter_search_dist, 4134 const unsigned partition_order, 4135 const FLAC__bool search_for_escapes, 4136 FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, 4137 unsigned *bits 4138) 4139{ 4140 unsigned rice_parameter, partition_bits; 4141 unsigned best_partition_bits, best_rice_parameter = 0; 4142 unsigned bits_ = FLAC__ENTROPY_CODING_METHOD_TYPE_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN; 4143 unsigned *parameters, *raw_bits; 4144#ifdef ENABLE_RICE_PARAMETER_SEARCH 4145 unsigned min_rice_parameter, max_rice_parameter; 4146#else 4147 (void)rice_parameter_search_dist; 4148#endif 4149 4150 FLAC__ASSERT(suggested_rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER); 4151 FLAC__ASSERT(rice_parameter_limit <= FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER); 4152 4153 FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, flac_max(6u, partition_order)); 4154 parameters = partitioned_rice_contents->parameters; 4155 raw_bits = partitioned_rice_contents->raw_bits; 4156 4157 if(partition_order == 0) { 4158 best_partition_bits = (unsigned)(-1); 4159#ifdef ENABLE_RICE_PARAMETER_SEARCH 4160 if(rice_parameter_search_dist) { 4161 if(suggested_rice_parameter < rice_parameter_search_dist) 4162 min_rice_parameter = 0; 4163 else 4164 min_rice_parameter = suggested_rice_parameter - rice_parameter_search_dist; 4165 max_rice_parameter = suggested_rice_parameter + rice_parameter_search_dist; 4166 if(max_rice_parameter >= rice_parameter_limit) { 4167#ifdef DEBUG_VERBOSE 4168 fprintf(stderr, "clipping rice_parameter (%u -> %u) @5\n", max_rice_parameter, rice_parameter_limit - 1); 4169#endif 4170 max_rice_parameter = rice_parameter_limit - 1; 4171 } 4172 } 4173 else 4174 min_rice_parameter = max_rice_parameter = suggested_rice_parameter; 4175 4176 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) { 4177#else 4178 rice_parameter = suggested_rice_parameter; 4179#endif 4180#ifdef EXACT_RICE_BITS_CALCULATION 4181 partition_bits = count_rice_bits_in_partition_(rice_parameter, residual_samples, residual); 4182#else 4183 partition_bits = count_rice_bits_in_partition_(rice_parameter, residual_samples, abs_residual_partition_sums[0]); 4184#endif 4185 if(partition_bits < best_partition_bits) { 4186 best_rice_parameter = rice_parameter; 4187 best_partition_bits = partition_bits; 4188 } 4189#ifdef ENABLE_RICE_PARAMETER_SEARCH 4190 } 4191#endif 4192 if(search_for_escapes) { 4193 partition_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[0] * residual_samples; 4194 if(partition_bits <= best_partition_bits) { 4195 raw_bits[0] = raw_bits_per_partition[0]; 4196 best_rice_parameter = 0; /* will be converted to appropriate escape parameter later */ 4197 best_partition_bits = partition_bits; 4198 } 4199 else 4200 raw_bits[0] = 0; 4201 } 4202 parameters[0] = best_rice_parameter; 4203 bits_ += best_partition_bits; 4204 } 4205 else { 4206 unsigned partition, residual_sample; 4207 unsigned partition_samples; 4208 FLAC__uint64 mean, k; 4209 const unsigned partitions = 1u << partition_order; 4210 for(partition = residual_sample = 0; partition < partitions; partition++) { 4211 partition_samples = (residual_samples+predictor_order) >> partition_order; 4212 if(partition == 0) { 4213 if(partition_samples <= predictor_order) 4214 return false; 4215 else 4216 partition_samples -= predictor_order; 4217 } 4218 mean = abs_residual_partition_sums[partition]; 4219 /* we are basically calculating the size in bits of the 4220 * average residual magnitude in the partition: 4221 * rice_parameter = floor(log2(mean/partition_samples)) 4222 * 'mean' is not a good name for the variable, it is 4223 * actually the sum of magnitudes of all residual values 4224 * in the partition, so the actual mean is 4225 * mean/partition_samples 4226 */ 4227#if 0 /* old simple code */ 4228 for(rice_parameter = 0, k = partition_samples; k < mean; rice_parameter++, k <<= 1) 4229 ; 4230#else 4231#if defined FLAC__CPU_X86_64 /* and other 64-bit arch, too */ 4232 if(mean <= 0x80000000/512) { /* 512: more or less optimal for both 16- and 24-bit input */ 4233#else 4234 if(mean <= 0x80000000/8) { /* 32-bit arch: use 32-bit math if possible */ 4235#endif 4236 FLAC__uint32 k2, mean2 = (FLAC__uint32) mean; 4237 rice_parameter = 0; k2 = partition_samples; 4238 while(k2*8 < mean2) { /* requires: mean <= (2^31)/8 */ 4239 rice_parameter += 4; k2 <<= 4; /* tuned for 16-bit input */ 4240 } 4241 while(k2 < mean2) { /* requires: mean <= 2^31 */ 4242 rice_parameter++; k2 <<= 1; 4243 } 4244 } 4245 else { 4246 rice_parameter = 0; k = partition_samples; 4247 if(mean <= FLAC__U64L(0x8000000000000000)/128) /* usually mean is _much_ smaller than this value */ 4248 while(k*128 < mean) { /* requires: mean <= (2^63)/128 */ 4249 rice_parameter += 8; k <<= 8; /* tuned for 24-bit input */ 4250 } 4251 while(k < mean) { /* requires: mean <= 2^63 */ 4252 rice_parameter++; k <<= 1; 4253 } 4254 } 4255#endif 4256 if(rice_parameter >= rice_parameter_limit) { 4257#ifdef DEBUG_VERBOSE 4258 fprintf(stderr, "clipping rice_parameter (%u -> %u) @6\n", rice_parameter, rice_parameter_limit - 1); 4259#endif 4260 rice_parameter = rice_parameter_limit - 1; 4261 } 4262 4263 best_partition_bits = (unsigned)(-1); 4264#ifdef ENABLE_RICE_PARAMETER_SEARCH 4265 if(rice_parameter_search_dist) { 4266 if(rice_parameter < rice_parameter_search_dist) 4267 min_rice_parameter = 0; 4268 else 4269 min_rice_parameter = rice_parameter - rice_parameter_search_dist; 4270 max_rice_parameter = rice_parameter + rice_parameter_search_dist; 4271 if(max_rice_parameter >= rice_parameter_limit) { 4272#ifdef DEBUG_VERBOSE 4273 fprintf(stderr, "clipping rice_parameter (%u -> %u) @7\n", max_rice_parameter, rice_parameter_limit - 1); 4274#endif 4275 max_rice_parameter = rice_parameter_limit - 1; 4276 } 4277 } 4278 else 4279 min_rice_parameter = max_rice_parameter = rice_parameter; 4280 4281 for(rice_parameter = min_rice_parameter; rice_parameter <= max_rice_parameter; rice_parameter++) { 4282#endif 4283#ifdef EXACT_RICE_BITS_CALCULATION 4284 partition_bits = count_rice_bits_in_partition_(rice_parameter, partition_samples, residual+residual_sample); 4285#else 4286 partition_bits = count_rice_bits_in_partition_(rice_parameter, partition_samples, abs_residual_partition_sums[partition]); 4287#endif 4288 if(partition_bits < best_partition_bits) { 4289 best_rice_parameter = rice_parameter; 4290 best_partition_bits = partition_bits; 4291 } 4292#ifdef ENABLE_RICE_PARAMETER_SEARCH 4293 } 4294#endif 4295 if(search_for_escapes) { 4296 partition_bits = FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN + FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN + raw_bits_per_partition[partition] * partition_samples; 4297 if(partition_bits <= best_partition_bits) { 4298 raw_bits[partition] = raw_bits_per_partition[partition]; 4299 best_rice_parameter = 0; /* will be converted to appropriate escape parameter later */ 4300 best_partition_bits = partition_bits; 4301 } 4302 else 4303 raw_bits[partition] = 0; 4304 } 4305 parameters[partition] = best_rice_parameter; 4306 bits_ += best_partition_bits; 4307 residual_sample += partition_samples; 4308 } 4309 } 4310 4311 *bits = bits_; 4312 return true; 4313} 4314 4315unsigned get_wasted_bits_(FLAC__int32 signal[], unsigned samples) 4316{ 4317 unsigned i, shift; 4318 FLAC__int32 x = 0; 4319 4320 for(i = 0; i < samples && !(x&1); i++) 4321 x |= signal[i]; 4322 4323 if(x == 0) { 4324 shift = 0; 4325 } 4326 else { 4327 for(shift = 0; !(x&1); shift++) 4328 x >>= 1; 4329 } 4330 4331 if(shift > 0) { 4332 for(i = 0; i < samples; i++) 4333 signal[i] >>= shift; 4334 } 4335 4336 return shift; 4337} 4338 4339void append_to_verify_fifo_(verify_input_fifo *fifo, const FLAC__int32 * const input[], unsigned input_offset, unsigned channels, unsigned wide_samples) 4340{ 4341 unsigned channel; 4342 4343 for(channel = 0; channel < channels; channel++) 4344 memcpy(&fifo->data[channel][fifo->tail], &input[channel][input_offset], sizeof(FLAC__int32) * wide_samples); 4345 4346 fifo->tail += wide_samples; 4347 4348 FLAC__ASSERT(fifo->tail <= fifo->size); 4349} 4350 4351void append_to_verify_fifo_interleaved_(verify_input_fifo *fifo, const FLAC__int32 input[], unsigned input_offset, unsigned channels, unsigned wide_samples) 4352{ 4353 unsigned channel; 4354 unsigned sample, wide_sample; 4355 unsigned tail = fifo->tail; 4356 4357 sample = input_offset * channels; 4358 for(wide_sample = 0; wide_sample < wide_samples; wide_sample++) { 4359 for(channel = 0; channel < channels; channel++) 4360 fifo->data[channel][tail] = input[sample++]; 4361 tail++; 4362 } 4363 fifo->tail = tail; 4364 4365 FLAC__ASSERT(fifo->tail <= fifo->size); 4366} 4367 4368FLAC__StreamDecoderReadStatus verify_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data) 4369{ 4370 FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data; 4371 const size_t encoded_bytes = encoder->private_->verify.output.bytes; 4372 (void)decoder; 4373 4374 if(encoder->private_->verify.needs_magic_hack) { 4375 FLAC__ASSERT(*bytes >= FLAC__STREAM_SYNC_LENGTH); 4376 *bytes = FLAC__STREAM_SYNC_LENGTH; 4377 memcpy(buffer, FLAC__STREAM_SYNC_STRING, *bytes); 4378 encoder->private_->verify.needs_magic_hack = false; 4379 } 4380 else { 4381 if(encoded_bytes == 0) { 4382 /* 4383 * If we get here, a FIFO underflow has occurred, 4384 * which means there is a bug somewhere. 4385 */ 4386 FLAC__ASSERT(0); 4387 return FLAC__STREAM_DECODER_READ_STATUS_ABORT; 4388 } 4389 else if(encoded_bytes < *bytes) 4390 *bytes = encoded_bytes; 4391 memcpy(buffer, encoder->private_->verify.output.data, *bytes); 4392 encoder->private_->verify.output.data += *bytes; 4393 encoder->private_->verify.output.bytes -= *bytes; 4394 } 4395 4396 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; 4397} 4398 4399FLAC__StreamDecoderWriteStatus verify_write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[], void *client_data) 4400{ 4401 FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder *)client_data; 4402 unsigned channel; 4403 const unsigned channels = frame->header.channels; 4404 const unsigned blocksize = frame->header.blocksize; 4405 const unsigned bytes_per_block = sizeof(FLAC__int32) * blocksize; 4406 4407 (void)decoder; 4408 4409 for(channel = 0; channel < channels; channel++) { 4410 if(0 != memcmp(buffer[channel], encoder->private_->verify.input_fifo.data[channel], bytes_per_block)) { 4411 unsigned i, sample = 0; 4412 FLAC__int32 expect = 0, got = 0; 4413 4414 for(i = 0; i < blocksize; i++) { 4415 if(buffer[channel][i] != encoder->private_->verify.input_fifo.data[channel][i]) { 4416 sample = i; 4417 expect = (FLAC__int32)encoder->private_->verify.input_fifo.data[channel][i]; 4418 got = (FLAC__int32)buffer[channel][i]; 4419 break; 4420 } 4421 } 4422 FLAC__ASSERT(i < blocksize); 4423 FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER); 4424 encoder->private_->verify.error_stats.absolute_sample = frame->header.number.sample_number + sample; 4425 encoder->private_->verify.error_stats.frame_number = (unsigned)(frame->header.number.sample_number / blocksize); 4426 encoder->private_->verify.error_stats.channel = channel; 4427 encoder->private_->verify.error_stats.sample = sample; 4428 encoder->private_->verify.error_stats.expected = expect; 4429 encoder->private_->verify.error_stats.got = got; 4430 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_MISMATCH_IN_AUDIO_DATA; 4431 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT; 4432 } 4433 } 4434 /* dequeue the frame from the fifo */ 4435 encoder->private_->verify.input_fifo.tail -= blocksize; 4436 FLAC__ASSERT(encoder->private_->verify.input_fifo.tail <= OVERREAD_); 4437 for(channel = 0; channel < channels; channel++) 4438 memmove(&encoder->private_->verify.input_fifo.data[channel][0], &encoder->private_->verify.input_fifo.data[channel][blocksize], encoder->private_->verify.input_fifo.tail * sizeof(encoder->private_->verify.input_fifo.data[0][0])); 4439 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE; 4440} 4441 4442void verify_metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetadata *metadata, void *client_data) 4443{ 4444 (void)decoder, (void)metadata, (void)client_data; 4445} 4446 4447void verify_error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data) 4448{ 4449 FLAC__StreamEncoder *encoder = (FLAC__StreamEncoder*)client_data; 4450 (void)decoder, (void)status; 4451 encoder->protected_->state = FLAC__STREAM_ENCODER_VERIFY_DECODER_ERROR; 4452} 4453 4454FLAC__StreamEncoderReadStatus file_read_callback_(const FLAC__StreamEncoder *encoder, FLAC__byte buffer[], size_t *bytes, void *client_data) 4455{ 4456 (void)client_data; 4457 4458 *bytes = fread(buffer, 1, *bytes, encoder->private_->file); 4459 if (*bytes == 0) { 4460 if (feof(encoder->private_->file)) 4461 return FLAC__STREAM_ENCODER_READ_STATUS_END_OF_STREAM; 4462 else if (ferror(encoder->private_->file)) 4463 return FLAC__STREAM_ENCODER_READ_STATUS_ABORT; 4464 } 4465 return FLAC__STREAM_ENCODER_READ_STATUS_CONTINUE; 4466} 4467 4468FLAC__StreamEncoderSeekStatus file_seek_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data) 4469{ 4470 (void)client_data; 4471 4472 if(fseeko(encoder->private_->file, (FLAC__off_t)absolute_byte_offset, SEEK_SET) < 0) 4473 return FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR; 4474 else 4475 return FLAC__STREAM_ENCODER_SEEK_STATUS_OK; 4476} 4477 4478FLAC__StreamEncoderTellStatus file_tell_callback_(const FLAC__StreamEncoder *encoder, FLAC__uint64 *absolute_byte_offset, void *client_data) 4479{ 4480 FLAC__off_t offset; 4481 4482 (void)client_data; 4483 4484 offset = ftello(encoder->private_->file); 4485 4486 if(offset < 0) { 4487 return FLAC__STREAM_ENCODER_TELL_STATUS_ERROR; 4488 } 4489 else { 4490 *absolute_byte_offset = (FLAC__uint64)offset; 4491 return FLAC__STREAM_ENCODER_TELL_STATUS_OK; 4492 } 4493} 4494 4495#ifdef FLAC__VALGRIND_TESTING 4496static size_t local__fwrite(const void *ptr, size_t size, size_t nmemb, FILE *stream) 4497{ 4498 size_t ret = fwrite(ptr, size, nmemb, stream); 4499 if(!ferror(stream)) 4500 fflush(stream); 4501 return ret; 4502} 4503#else 4504#define local__fwrite fwrite 4505#endif 4506 4507FLAC__StreamEncoderWriteStatus file_write_callback_(const FLAC__StreamEncoder *encoder, const FLAC__byte buffer[], size_t bytes, unsigned samples, unsigned current_frame, void *client_data) 4508{ 4509 (void)client_data, (void)current_frame; 4510 4511 if(local__fwrite(buffer, sizeof(FLAC__byte), bytes, encoder->private_->file) == bytes) { 4512 FLAC__bool call_it = 0 != encoder->private_->progress_callback && ( 4513#if FLAC__HAS_OGG 4514 /* We would like to be able to use 'samples > 0' in the 4515 * clause here but currently because of the nature of our 4516 * Ogg writing implementation, 'samples' is always 0 (see 4517 * ogg_encoder_aspect.c). The downside is extra progress 4518 * callbacks. 4519 */ 4520 encoder->private_->is_ogg? true : 4521#endif 4522 samples > 0 4523 ); 4524 if(call_it) { 4525 /* NOTE: We have to add +bytes, +samples, and +1 to the stats 4526 * because at this point in the callback chain, the stats 4527 * have not been updated. Only after we return and control 4528 * gets back to write_frame_() are the stats updated 4529 */ 4530 encoder->private_->progress_callback(encoder, encoder->private_->bytes_written+bytes, encoder->private_->samples_written+samples, encoder->private_->frames_written+(samples?1:0), encoder->private_->total_frames_estimate, encoder->private_->client_data); 4531 } 4532 return FLAC__STREAM_ENCODER_WRITE_STATUS_OK; 4533 } 4534 else 4535 return FLAC__STREAM_ENCODER_WRITE_STATUS_FATAL_ERROR; 4536} 4537 4538/* 4539 * This will forcibly set stdout to binary mode (for OSes that require it) 4540 */ 4541FILE *get_binary_stdout_(void) 4542{ 4543 /* if something breaks here it is probably due to the presence or 4544 * absence of an underscore before the identifiers 'setmode', 4545 * 'fileno', and/or 'O_BINARY'; check your system header files. 4546 */ 4547#if defined _MSC_VER || defined __MINGW32__ 4548 _setmode(_fileno(stdout), _O_BINARY); 4549#elif defined __CYGWIN__ 4550 /* almost certainly not needed for any modern Cygwin, but let's be safe... */ 4551 setmode(_fileno(stdout), _O_BINARY); 4552#elif defined __EMX__ 4553 setmode(fileno(stdout), O_BINARY); 4554#endif 4555 4556 return stdout; 4557} 4558