1/*
2 *  Copyright (c) 2010 The WebM project authors. All Rights Reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS.  All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include <stdlib.h>
12#include <string.h>
13
14#include "./vpx_config.h"
15#include "./vpx_version.h"
16
17#include "vpx/internal/vpx_codec_internal.h"
18#include "vpx/vp8dx.h"
19#include "vpx/vpx_decoder.h"
20#include "vpx_dsp/bitreader_buffer.h"
21#include "vpx_dsp/vpx_dsp_common.h"
22#include "vpx_util/vpx_thread.h"
23
24#include "vp9/common/vp9_alloccommon.h"
25#include "vp9/common/vp9_frame_buffers.h"
26
27#include "vp9/decoder/vp9_decodeframe.h"
28
29#include "vp9/vp9_dx_iface.h"
30#include "vp9/vp9_iface_common.h"
31
32#define VP9_CAP_POSTPROC (CONFIG_VP9_POSTPROC ? VPX_CODEC_CAP_POSTPROC : 0)
33
34static vpx_codec_err_t decoder_init(vpx_codec_ctx_t *ctx,
35                                    vpx_codec_priv_enc_mr_cfg_t *data) {
36  // This function only allocates space for the vpx_codec_alg_priv_t
37  // structure. More memory may be required at the time the stream
38  // information becomes known.
39  (void)data;
40
41  if (!ctx->priv) {
42    vpx_codec_alg_priv_t *const priv =
43        (vpx_codec_alg_priv_t *)vpx_calloc(1, sizeof(*priv));
44    if (priv == NULL) return VPX_CODEC_MEM_ERROR;
45
46    ctx->priv = (vpx_codec_priv_t *)priv;
47    ctx->priv->init_flags = ctx->init_flags;
48    priv->si.sz = sizeof(priv->si);
49    priv->flushed = 0;
50    if (ctx->config.dec) {
51      priv->cfg = *ctx->config.dec;
52      ctx->config.dec = &priv->cfg;
53    }
54  }
55
56  return VPX_CODEC_OK;
57}
58
59static vpx_codec_err_t decoder_destroy(vpx_codec_alg_priv_t *ctx) {
60  if (ctx->pbi != NULL) {
61    vp9_decoder_remove(ctx->pbi);
62  }
63
64  if (ctx->buffer_pool) {
65    vp9_free_ref_frame_buffers(ctx->buffer_pool);
66    vp9_free_internal_frame_buffers(&ctx->buffer_pool->int_frame_buffers);
67  }
68
69  vpx_free(ctx->buffer_pool);
70  vpx_free(ctx);
71  return VPX_CODEC_OK;
72}
73
74static int parse_bitdepth_colorspace_sampling(BITSTREAM_PROFILE profile,
75                                              struct vpx_read_bit_buffer *rb) {
76  vpx_color_space_t color_space;
77  if (profile >= PROFILE_2) rb->bit_offset += 1;  // Bit-depth 10 or 12.
78  color_space = (vpx_color_space_t)vpx_rb_read_literal(rb, 3);
79  if (color_space != VPX_CS_SRGB) {
80    rb->bit_offset += 1;  // [16,235] (including xvycc) vs [0,255] range.
81    if (profile == PROFILE_1 || profile == PROFILE_3) {
82      rb->bit_offset += 2;  // subsampling x/y.
83      rb->bit_offset += 1;  // unused.
84    }
85  } else {
86    if (profile == PROFILE_1 || profile == PROFILE_3) {
87      rb->bit_offset += 1;  // unused
88    } else {
89      // RGB is only available in version 1.
90      return 0;
91    }
92  }
93  return 1;
94}
95
96static vpx_codec_err_t decoder_peek_si_internal(
97    const uint8_t *data, unsigned int data_sz, vpx_codec_stream_info_t *si,
98    int *is_intra_only, vpx_decrypt_cb decrypt_cb, void *decrypt_state) {
99  int intra_only_flag = 0;
100  uint8_t clear_buffer[10];
101
102  if (data + data_sz <= data) return VPX_CODEC_INVALID_PARAM;
103
104  si->is_kf = 0;
105  si->w = si->h = 0;
106
107  if (decrypt_cb) {
108    data_sz = VPXMIN(sizeof(clear_buffer), data_sz);
109    decrypt_cb(decrypt_state, data, clear_buffer, data_sz);
110    data = clear_buffer;
111  }
112
113  // A maximum of 6 bits are needed to read the frame marker, profile and
114  // show_existing_frame.
115  if (data_sz < 1) return VPX_CODEC_UNSUP_BITSTREAM;
116
117  {
118    int show_frame;
119    int error_resilient;
120    struct vpx_read_bit_buffer rb = { data, data + data_sz, 0, NULL, NULL };
121    const int frame_marker = vpx_rb_read_literal(&rb, 2);
122    const BITSTREAM_PROFILE profile = vp9_read_profile(&rb);
123
124    if (frame_marker != VP9_FRAME_MARKER) return VPX_CODEC_UNSUP_BITSTREAM;
125
126    if (profile >= MAX_PROFILES) return VPX_CODEC_UNSUP_BITSTREAM;
127
128    if (vpx_rb_read_bit(&rb)) {  // show an existing frame
129      // If profile is > 2 and show_existing_frame is true, then at least 1 more
130      // byte (6+3=9 bits) is needed.
131      if (profile > 2 && data_sz < 2) return VPX_CODEC_UNSUP_BITSTREAM;
132      vpx_rb_read_literal(&rb, 3);  // Frame buffer to show.
133      return VPX_CODEC_OK;
134    }
135
136    // For the rest of the function, a maximum of 9 more bytes are needed
137    // (computed by taking the maximum possible bits needed in each case). Note
138    // that this has to be updated if we read any more bits in this function.
139    if (data_sz < 10) return VPX_CODEC_UNSUP_BITSTREAM;
140
141    si->is_kf = !vpx_rb_read_bit(&rb);
142    show_frame = vpx_rb_read_bit(&rb);
143    error_resilient = vpx_rb_read_bit(&rb);
144
145    if (si->is_kf) {
146      if (!vp9_read_sync_code(&rb)) return VPX_CODEC_UNSUP_BITSTREAM;
147
148      if (!parse_bitdepth_colorspace_sampling(profile, &rb))
149        return VPX_CODEC_UNSUP_BITSTREAM;
150      vp9_read_frame_size(&rb, (int *)&si->w, (int *)&si->h);
151    } else {
152      intra_only_flag = show_frame ? 0 : vpx_rb_read_bit(&rb);
153
154      rb.bit_offset += error_resilient ? 0 : 2;  // reset_frame_context
155
156      if (intra_only_flag) {
157        if (!vp9_read_sync_code(&rb)) return VPX_CODEC_UNSUP_BITSTREAM;
158        if (profile > PROFILE_0) {
159          if (!parse_bitdepth_colorspace_sampling(profile, &rb))
160            return VPX_CODEC_UNSUP_BITSTREAM;
161        }
162        rb.bit_offset += REF_FRAMES;  // refresh_frame_flags
163        vp9_read_frame_size(&rb, (int *)&si->w, (int *)&si->h);
164      }
165    }
166  }
167  if (is_intra_only != NULL) *is_intra_only = intra_only_flag;
168  return VPX_CODEC_OK;
169}
170
171static vpx_codec_err_t decoder_peek_si(const uint8_t *data,
172                                       unsigned int data_sz,
173                                       vpx_codec_stream_info_t *si) {
174  return decoder_peek_si_internal(data, data_sz, si, NULL, NULL, NULL);
175}
176
177static vpx_codec_err_t decoder_get_si(vpx_codec_alg_priv_t *ctx,
178                                      vpx_codec_stream_info_t *si) {
179  const size_t sz = (si->sz >= sizeof(vp9_stream_info_t))
180                        ? sizeof(vp9_stream_info_t)
181                        : sizeof(vpx_codec_stream_info_t);
182  memcpy(si, &ctx->si, sz);
183  si->sz = (unsigned int)sz;
184
185  return VPX_CODEC_OK;
186}
187
188static void set_error_detail(vpx_codec_alg_priv_t *ctx,
189                             const char *const error) {
190  ctx->base.err_detail = error;
191}
192
193static vpx_codec_err_t update_error_state(
194    vpx_codec_alg_priv_t *ctx, const struct vpx_internal_error_info *error) {
195  if (error->error_code)
196    set_error_detail(ctx, error->has_detail ? error->detail : NULL);
197
198  return error->error_code;
199}
200
201static void init_buffer_callbacks(vpx_codec_alg_priv_t *ctx) {
202  VP9_COMMON *const cm = &ctx->pbi->common;
203  BufferPool *const pool = cm->buffer_pool;
204
205  cm->new_fb_idx = INVALID_IDX;
206  cm->byte_alignment = ctx->byte_alignment;
207  cm->skip_loop_filter = ctx->skip_loop_filter;
208
209  if (ctx->get_ext_fb_cb != NULL && ctx->release_ext_fb_cb != NULL) {
210    pool->get_fb_cb = ctx->get_ext_fb_cb;
211    pool->release_fb_cb = ctx->release_ext_fb_cb;
212    pool->cb_priv = ctx->ext_priv;
213  } else {
214    pool->get_fb_cb = vp9_get_frame_buffer;
215    pool->release_fb_cb = vp9_release_frame_buffer;
216
217    if (vp9_alloc_internal_frame_buffers(&pool->int_frame_buffers))
218      vpx_internal_error(&cm->error, VPX_CODEC_MEM_ERROR,
219                         "Failed to initialize internal frame buffers");
220
221    pool->cb_priv = &pool->int_frame_buffers;
222  }
223}
224
225static void set_default_ppflags(vp8_postproc_cfg_t *cfg) {
226  cfg->post_proc_flag = VP8_DEBLOCK | VP8_DEMACROBLOCK;
227  cfg->deblocking_level = 4;
228  cfg->noise_level = 0;
229}
230
231static void set_ppflags(const vpx_codec_alg_priv_t *ctx, vp9_ppflags_t *flags) {
232  flags->post_proc_flag = ctx->postproc_cfg.post_proc_flag;
233
234  flags->deblocking_level = ctx->postproc_cfg.deblocking_level;
235  flags->noise_level = ctx->postproc_cfg.noise_level;
236}
237
238static vpx_codec_err_t init_decoder(vpx_codec_alg_priv_t *ctx) {
239  ctx->last_show_frame = -1;
240  ctx->need_resync = 1;
241  ctx->flushed = 0;
242
243  ctx->buffer_pool = (BufferPool *)vpx_calloc(1, sizeof(BufferPool));
244  if (ctx->buffer_pool == NULL) return VPX_CODEC_MEM_ERROR;
245
246  ctx->pbi = vp9_decoder_create(ctx->buffer_pool);
247  if (ctx->pbi == NULL) {
248    set_error_detail(ctx, "Failed to allocate decoder");
249    return VPX_CODEC_MEM_ERROR;
250  }
251  ctx->pbi->max_threads = ctx->cfg.threads;
252  ctx->pbi->inv_tile_order = ctx->invert_tile_order;
253
254  // If postprocessing was enabled by the application and a
255  // configuration has not been provided, default it.
256  if (!ctx->postproc_cfg_set && (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC))
257    set_default_ppflags(&ctx->postproc_cfg);
258
259  init_buffer_callbacks(ctx);
260
261  return VPX_CODEC_OK;
262}
263
264static INLINE void check_resync(vpx_codec_alg_priv_t *const ctx,
265                                const VP9Decoder *const pbi) {
266  // Clear resync flag if the decoder got a key frame or intra only frame.
267  if (ctx->need_resync == 1 && pbi->need_resync == 0 &&
268      (pbi->common.intra_only || pbi->common.frame_type == KEY_FRAME))
269    ctx->need_resync = 0;
270}
271
272static vpx_codec_err_t decode_one(vpx_codec_alg_priv_t *ctx,
273                                  const uint8_t **data, unsigned int data_sz,
274                                  void *user_priv, int64_t deadline) {
275  (void)deadline;
276
277  // Determine the stream parameters. Note that we rely on peek_si to
278  // validate that we have a buffer that does not wrap around the top
279  // of the heap.
280  if (!ctx->si.h) {
281    int is_intra_only = 0;
282    const vpx_codec_err_t res =
283        decoder_peek_si_internal(*data, data_sz, &ctx->si, &is_intra_only,
284                                 ctx->decrypt_cb, ctx->decrypt_state);
285    if (res != VPX_CODEC_OK) return res;
286
287    if (!ctx->si.is_kf && !is_intra_only) return VPX_CODEC_ERROR;
288  }
289
290  ctx->user_priv = user_priv;
291
292  // Set these even if already initialized.  The caller may have changed the
293  // decrypt config between frames.
294  ctx->pbi->decrypt_cb = ctx->decrypt_cb;
295  ctx->pbi->decrypt_state = ctx->decrypt_state;
296
297  if (vp9_receive_compressed_data(ctx->pbi, data_sz, data)) {
298    ctx->pbi->cur_buf->buf.corrupted = 1;
299    ctx->pbi->need_resync = 1;
300    ctx->need_resync = 1;
301    return update_error_state(ctx, &ctx->pbi->common.error);
302  }
303
304  check_resync(ctx, ctx->pbi);
305
306  return VPX_CODEC_OK;
307}
308
309static vpx_codec_err_t decoder_decode(vpx_codec_alg_priv_t *ctx,
310                                      const uint8_t *data, unsigned int data_sz,
311                                      void *user_priv, long deadline) {
312  const uint8_t *data_start = data;
313  const uint8_t *const data_end = data + data_sz;
314  vpx_codec_err_t res;
315  uint32_t frame_sizes[8];
316  int frame_count;
317
318  if (data == NULL && data_sz == 0) {
319    ctx->flushed = 1;
320    return VPX_CODEC_OK;
321  }
322
323  // Reset flushed when receiving a valid frame.
324  ctx->flushed = 0;
325
326  // Initialize the decoder on the first frame.
327  if (ctx->pbi == NULL) {
328    const vpx_codec_err_t res = init_decoder(ctx);
329    if (res != VPX_CODEC_OK) return res;
330  }
331
332  res = vp9_parse_superframe_index(data, data_sz, frame_sizes, &frame_count,
333                                   ctx->decrypt_cb, ctx->decrypt_state);
334  if (res != VPX_CODEC_OK) return res;
335
336  if (ctx->svc_decoding && ctx->svc_spatial_layer < frame_count - 1)
337    frame_count = ctx->svc_spatial_layer + 1;
338
339  // Decode in serial mode.
340  if (frame_count > 0) {
341    int i;
342
343    for (i = 0; i < frame_count; ++i) {
344      const uint8_t *data_start_copy = data_start;
345      const uint32_t frame_size = frame_sizes[i];
346      vpx_codec_err_t res;
347      if (data_start < data || frame_size > (uint32_t)(data_end - data_start)) {
348        set_error_detail(ctx, "Invalid frame size in index");
349        return VPX_CODEC_CORRUPT_FRAME;
350      }
351
352      res = decode_one(ctx, &data_start_copy, frame_size, user_priv, deadline);
353      if (res != VPX_CODEC_OK) return res;
354
355      data_start += frame_size;
356    }
357  } else {
358    while (data_start < data_end) {
359      const uint32_t frame_size = (uint32_t)(data_end - data_start);
360      const vpx_codec_err_t res =
361          decode_one(ctx, &data_start, frame_size, user_priv, deadline);
362      if (res != VPX_CODEC_OK) return res;
363
364      // Account for suboptimal termination by the encoder.
365      while (data_start < data_end) {
366        const uint8_t marker =
367            read_marker(ctx->decrypt_cb, ctx->decrypt_state, data_start);
368        if (marker) break;
369        ++data_start;
370      }
371    }
372  }
373
374  return res;
375}
376
377static vpx_image_t *decoder_get_frame(vpx_codec_alg_priv_t *ctx,
378                                      vpx_codec_iter_t *iter) {
379  vpx_image_t *img = NULL;
380
381  // Legacy parameter carried over from VP8. Has no effect for VP9 since we
382  // always return only 1 frame per decode call.
383  (void)iter;
384
385  if (ctx->pbi != NULL) {
386    YV12_BUFFER_CONFIG sd;
387    vp9_ppflags_t flags = { 0, 0, 0 };
388    if (ctx->base.init_flags & VPX_CODEC_USE_POSTPROC) set_ppflags(ctx, &flags);
389    if (vp9_get_raw_frame(ctx->pbi, &sd, &flags) == 0) {
390      VP9_COMMON *const cm = &ctx->pbi->common;
391      RefCntBuffer *const frame_bufs = cm->buffer_pool->frame_bufs;
392      ctx->last_show_frame = ctx->pbi->common.new_fb_idx;
393      if (ctx->need_resync) return NULL;
394      yuvconfig2image(&ctx->img, &sd, ctx->user_priv);
395      ctx->img.fb_priv = frame_bufs[cm->new_fb_idx].raw_frame_buffer.priv;
396      img = &ctx->img;
397      return img;
398    }
399  }
400  return NULL;
401}
402
403static vpx_codec_err_t decoder_set_fb_fn(
404    vpx_codec_alg_priv_t *ctx, vpx_get_frame_buffer_cb_fn_t cb_get,
405    vpx_release_frame_buffer_cb_fn_t cb_release, void *cb_priv) {
406  if (cb_get == NULL || cb_release == NULL) {
407    return VPX_CODEC_INVALID_PARAM;
408  } else if (ctx->pbi == NULL) {
409    // If the decoder has already been initialized, do not accept changes to
410    // the frame buffer functions.
411    ctx->get_ext_fb_cb = cb_get;
412    ctx->release_ext_fb_cb = cb_release;
413    ctx->ext_priv = cb_priv;
414    return VPX_CODEC_OK;
415  }
416
417  return VPX_CODEC_ERROR;
418}
419
420static vpx_codec_err_t ctrl_set_reference(vpx_codec_alg_priv_t *ctx,
421                                          va_list args) {
422  vpx_ref_frame_t *const data = va_arg(args, vpx_ref_frame_t *);
423
424  if (data) {
425    vpx_ref_frame_t *const frame = (vpx_ref_frame_t *)data;
426    YV12_BUFFER_CONFIG sd;
427    image2yuvconfig(&frame->img, &sd);
428    return vp9_set_reference_dec(
429        &ctx->pbi->common, ref_frame_to_vp9_reframe(frame->frame_type), &sd);
430  } else {
431    return VPX_CODEC_INVALID_PARAM;
432  }
433}
434
435static vpx_codec_err_t ctrl_copy_reference(vpx_codec_alg_priv_t *ctx,
436                                           va_list args) {
437  vpx_ref_frame_t *data = va_arg(args, vpx_ref_frame_t *);
438
439  if (data) {
440    vpx_ref_frame_t *frame = (vpx_ref_frame_t *)data;
441    YV12_BUFFER_CONFIG sd;
442    image2yuvconfig(&frame->img, &sd);
443    return vp9_copy_reference_dec(ctx->pbi, (VP9_REFFRAME)frame->frame_type,
444                                  &sd);
445  } else {
446    return VPX_CODEC_INVALID_PARAM;
447  }
448}
449
450static vpx_codec_err_t ctrl_get_reference(vpx_codec_alg_priv_t *ctx,
451                                          va_list args) {
452  vp9_ref_frame_t *data = va_arg(args, vp9_ref_frame_t *);
453
454  if (data) {
455    YV12_BUFFER_CONFIG *fb;
456    fb = get_ref_frame(&ctx->pbi->common, data->idx);
457    if (fb == NULL) return VPX_CODEC_ERROR;
458    yuvconfig2image(&data->img, fb, NULL);
459    return VPX_CODEC_OK;
460  } else {
461    return VPX_CODEC_INVALID_PARAM;
462  }
463}
464
465static vpx_codec_err_t ctrl_set_postproc(vpx_codec_alg_priv_t *ctx,
466                                         va_list args) {
467#if CONFIG_VP9_POSTPROC
468  vp8_postproc_cfg_t *data = va_arg(args, vp8_postproc_cfg_t *);
469
470  if (data) {
471    ctx->postproc_cfg_set = 1;
472    ctx->postproc_cfg = *((vp8_postproc_cfg_t *)data);
473    return VPX_CODEC_OK;
474  } else {
475    return VPX_CODEC_INVALID_PARAM;
476  }
477#else
478  (void)ctx;
479  (void)args;
480  return VPX_CODEC_INCAPABLE;
481#endif
482}
483
484static vpx_codec_err_t ctrl_get_quantizer(vpx_codec_alg_priv_t *ctx,
485                                          va_list args) {
486  int *const arg = va_arg(args, int *);
487  if (arg == NULL || ctx->pbi == NULL) return VPX_CODEC_INVALID_PARAM;
488  *arg = ctx->pbi->common.base_qindex;
489  return VPX_CODEC_OK;
490}
491
492static vpx_codec_err_t ctrl_get_last_ref_updates(vpx_codec_alg_priv_t *ctx,
493                                                 va_list args) {
494  int *const update_info = va_arg(args, int *);
495
496  if (update_info) {
497    if (ctx->pbi != NULL) {
498      *update_info = ctx->pbi->refresh_frame_flags;
499      return VPX_CODEC_OK;
500    } else {
501      return VPX_CODEC_ERROR;
502    }
503  }
504
505  return VPX_CODEC_INVALID_PARAM;
506}
507
508static vpx_codec_err_t ctrl_get_frame_corrupted(vpx_codec_alg_priv_t *ctx,
509                                                va_list args) {
510  int *corrupted = va_arg(args, int *);
511
512  if (corrupted) {
513    if (ctx->pbi != NULL) {
514      RefCntBuffer *const frame_bufs = ctx->pbi->common.buffer_pool->frame_bufs;
515      if (ctx->pbi->common.frame_to_show == NULL) return VPX_CODEC_ERROR;
516      if (ctx->last_show_frame >= 0)
517        *corrupted = frame_bufs[ctx->last_show_frame].buf.corrupted;
518      return VPX_CODEC_OK;
519    } else {
520      return VPX_CODEC_ERROR;
521    }
522  }
523
524  return VPX_CODEC_INVALID_PARAM;
525}
526
527static vpx_codec_err_t ctrl_get_frame_size(vpx_codec_alg_priv_t *ctx,
528                                           va_list args) {
529  int *const frame_size = va_arg(args, int *);
530
531  if (frame_size) {
532    if (ctx->pbi != NULL) {
533      const VP9_COMMON *const cm = &ctx->pbi->common;
534      frame_size[0] = cm->width;
535      frame_size[1] = cm->height;
536      return VPX_CODEC_OK;
537    } else {
538      return VPX_CODEC_ERROR;
539    }
540  }
541
542  return VPX_CODEC_INVALID_PARAM;
543}
544
545static vpx_codec_err_t ctrl_get_render_size(vpx_codec_alg_priv_t *ctx,
546                                            va_list args) {
547  int *const render_size = va_arg(args, int *);
548
549  if (render_size) {
550    if (ctx->pbi != NULL) {
551      const VP9_COMMON *const cm = &ctx->pbi->common;
552      render_size[0] = cm->render_width;
553      render_size[1] = cm->render_height;
554      return VPX_CODEC_OK;
555    } else {
556      return VPX_CODEC_ERROR;
557    }
558  }
559
560  return VPX_CODEC_INVALID_PARAM;
561}
562
563static vpx_codec_err_t ctrl_get_bit_depth(vpx_codec_alg_priv_t *ctx,
564                                          va_list args) {
565  unsigned int *const bit_depth = va_arg(args, unsigned int *);
566
567  if (bit_depth) {
568    if (ctx->pbi != NULL) {
569      const VP9_COMMON *const cm = &ctx->pbi->common;
570      *bit_depth = cm->bit_depth;
571      return VPX_CODEC_OK;
572    } else {
573      return VPX_CODEC_ERROR;
574    }
575  }
576
577  return VPX_CODEC_INVALID_PARAM;
578}
579
580static vpx_codec_err_t ctrl_set_invert_tile_order(vpx_codec_alg_priv_t *ctx,
581                                                  va_list args) {
582  ctx->invert_tile_order = va_arg(args, int);
583  return VPX_CODEC_OK;
584}
585
586static vpx_codec_err_t ctrl_set_decryptor(vpx_codec_alg_priv_t *ctx,
587                                          va_list args) {
588  vpx_decrypt_init *init = va_arg(args, vpx_decrypt_init *);
589  ctx->decrypt_cb = init ? init->decrypt_cb : NULL;
590  ctx->decrypt_state = init ? init->decrypt_state : NULL;
591  return VPX_CODEC_OK;
592}
593
594static vpx_codec_err_t ctrl_set_byte_alignment(vpx_codec_alg_priv_t *ctx,
595                                               va_list args) {
596  const int legacy_byte_alignment = 0;
597  const int min_byte_alignment = 32;
598  const int max_byte_alignment = 1024;
599  const int byte_alignment = va_arg(args, int);
600
601  if (byte_alignment != legacy_byte_alignment &&
602      (byte_alignment < min_byte_alignment ||
603       byte_alignment > max_byte_alignment ||
604       (byte_alignment & (byte_alignment - 1)) != 0))
605    return VPX_CODEC_INVALID_PARAM;
606
607  ctx->byte_alignment = byte_alignment;
608  if (ctx->pbi != NULL) {
609    ctx->pbi->common.byte_alignment = byte_alignment;
610  }
611  return VPX_CODEC_OK;
612}
613
614static vpx_codec_err_t ctrl_set_skip_loop_filter(vpx_codec_alg_priv_t *ctx,
615                                                 va_list args) {
616  ctx->skip_loop_filter = va_arg(args, int);
617
618  if (ctx->pbi != NULL) {
619    ctx->pbi->common.skip_loop_filter = ctx->skip_loop_filter;
620  }
621
622  return VPX_CODEC_OK;
623}
624
625static vpx_codec_err_t ctrl_set_spatial_layer_svc(vpx_codec_alg_priv_t *ctx,
626                                                  va_list args) {
627  ctx->svc_decoding = 1;
628  ctx->svc_spatial_layer = va_arg(args, int);
629  if (ctx->svc_spatial_layer < 0)
630    return VPX_CODEC_INVALID_PARAM;
631  else
632    return VPX_CODEC_OK;
633}
634
635static vpx_codec_ctrl_fn_map_t decoder_ctrl_maps[] = {
636  { VP8_COPY_REFERENCE, ctrl_copy_reference },
637
638  // Setters
639  { VP8_SET_REFERENCE, ctrl_set_reference },
640  { VP8_SET_POSTPROC, ctrl_set_postproc },
641  { VP9_INVERT_TILE_DECODE_ORDER, ctrl_set_invert_tile_order },
642  { VPXD_SET_DECRYPTOR, ctrl_set_decryptor },
643  { VP9_SET_BYTE_ALIGNMENT, ctrl_set_byte_alignment },
644  { VP9_SET_SKIP_LOOP_FILTER, ctrl_set_skip_loop_filter },
645  { VP9_DECODE_SVC_SPATIAL_LAYER, ctrl_set_spatial_layer_svc },
646
647  // Getters
648  { VPXD_GET_LAST_QUANTIZER, ctrl_get_quantizer },
649  { VP8D_GET_LAST_REF_UPDATES, ctrl_get_last_ref_updates },
650  { VP8D_GET_FRAME_CORRUPTED, ctrl_get_frame_corrupted },
651  { VP9_GET_REFERENCE, ctrl_get_reference },
652  { VP9D_GET_DISPLAY_SIZE, ctrl_get_render_size },
653  { VP9D_GET_BIT_DEPTH, ctrl_get_bit_depth },
654  { VP9D_GET_FRAME_SIZE, ctrl_get_frame_size },
655
656  { -1, NULL },
657};
658
659#ifndef VERSION_STRING
660#define VERSION_STRING
661#endif
662CODEC_INTERFACE(vpx_codec_vp9_dx) = {
663  "WebM Project VP9 Decoder" VERSION_STRING,
664  VPX_CODEC_INTERNAL_ABI_VERSION,
665#if CONFIG_VP9_HIGHBITDEPTH
666  VPX_CODEC_CAP_HIGHBITDEPTH |
667#endif
668      VPX_CODEC_CAP_DECODER | VP9_CAP_POSTPROC |
669      VPX_CODEC_CAP_EXTERNAL_FRAME_BUFFER,  // vpx_codec_caps_t
670  decoder_init,                             // vpx_codec_init_fn_t
671  decoder_destroy,                          // vpx_codec_destroy_fn_t
672  decoder_ctrl_maps,                        // vpx_codec_ctrl_fn_map_t
673  {
674      // NOLINT
675      decoder_peek_si,    // vpx_codec_peek_si_fn_t
676      decoder_get_si,     // vpx_codec_get_si_fn_t
677      decoder_decode,     // vpx_codec_decode_fn_t
678      decoder_get_frame,  // vpx_codec_frame_get_fn_t
679      decoder_set_fb_fn,  // vpx_codec_set_fb_fn_t
680  },
681  {
682      // NOLINT
683      0,
684      NULL,  // vpx_codec_enc_cfg_map_t
685      NULL,  // vpx_codec_encode_fn_t
686      NULL,  // vpx_codec_get_cx_data_fn_t
687      NULL,  // vpx_codec_enc_config_set_fn_t
688      NULL,  // vpx_codec_get_global_headers_fn_t
689      NULL,  // vpx_codec_get_preview_frame_fn_t
690      NULL   // vpx_codec_enc_mr_get_mem_loc_fn_t
691  }
692};
693