1c74663799493f2b1e6123c18def94295d0afab7Kenny Root/* libFLAC - Free Lossless Audio Codec 2c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Copyright (C) 2002,2003,2004,2005,2006,2007 Josh Coalson 3c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 4c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Redistribution and use in source and binary forms, with or without 5c74663799493f2b1e6123c18def94295d0afab7Kenny Root * modification, are permitted provided that the following conditions 6c74663799493f2b1e6123c18def94295d0afab7Kenny Root * are met: 7c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 8c74663799493f2b1e6123c18def94295d0afab7Kenny Root * - Redistributions of source code must retain the above copyright 9c74663799493f2b1e6123c18def94295d0afab7Kenny Root * notice, this list of conditions and the following disclaimer. 10c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 11c74663799493f2b1e6123c18def94295d0afab7Kenny Root * - Redistributions in binary form must reproduce the above copyright 12c74663799493f2b1e6123c18def94295d0afab7Kenny Root * notice, this list of conditions and the following disclaimer in the 13c74663799493f2b1e6123c18def94295d0afab7Kenny Root * documentation and/or other materials provided with the distribution. 14c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 15c74663799493f2b1e6123c18def94295d0afab7Kenny Root * - Neither the name of the Xiph.org Foundation nor the names of its 16c74663799493f2b1e6123c18def94295d0afab7Kenny Root * contributors may be used to endorse or promote products derived from 17c74663799493f2b1e6123c18def94295d0afab7Kenny Root * this software without specific prior written permission. 18c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 19c74663799493f2b1e6123c18def94295d0afab7Kenny Root * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 20c74663799493f2b1e6123c18def94295d0afab7Kenny Root * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 21c74663799493f2b1e6123c18def94295d0afab7Kenny Root * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 22c74663799493f2b1e6123c18def94295d0afab7Kenny Root * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 23c74663799493f2b1e6123c18def94295d0afab7Kenny Root * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 24c74663799493f2b1e6123c18def94295d0afab7Kenny Root * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 25c74663799493f2b1e6123c18def94295d0afab7Kenny Root * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 26c74663799493f2b1e6123c18def94295d0afab7Kenny Root * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 27c74663799493f2b1e6123c18def94295d0afab7Kenny Root * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 28c74663799493f2b1e6123c18def94295d0afab7Kenny Root * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 29c74663799493f2b1e6123c18def94295d0afab7Kenny Root * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 31c74663799493f2b1e6123c18def94295d0afab7Kenny Root 32c74663799493f2b1e6123c18def94295d0afab7Kenny Root#if HAVE_CONFIG_H 33c74663799493f2b1e6123c18def94295d0afab7Kenny Root# include <config.h> 34c74663799493f2b1e6123c18def94295d0afab7Kenny Root#endif 35c74663799493f2b1e6123c18def94295d0afab7Kenny Root 36c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include <string.h> /* for memcpy() */ 37c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include "FLAC/assert.h" 38c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include "private/ogg_decoder_aspect.h" 39c74663799493f2b1e6123c18def94295d0afab7Kenny Root#include "private/ogg_mapping.h" 40c74663799493f2b1e6123c18def94295d0afab7Kenny Root 41c74663799493f2b1e6123c18def94295d0afab7Kenny Root#ifdef max 42c74663799493f2b1e6123c18def94295d0afab7Kenny Root#undef max 43c74663799493f2b1e6123c18def94295d0afab7Kenny Root#endif 44c74663799493f2b1e6123c18def94295d0afab7Kenny Root#define max(x,y) ((x)>(y)?(x):(y)) 45c74663799493f2b1e6123c18def94295d0afab7Kenny Root 46c74663799493f2b1e6123c18def94295d0afab7Kenny Root/*********************************************************************** 47c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 48c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Public class methods 49c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 50c74663799493f2b1e6123c18def94295d0afab7Kenny Root ***********************************************************************/ 51c74663799493f2b1e6123c18def94295d0afab7Kenny Root 52c74663799493f2b1e6123c18def94295d0afab7Kenny RootFLAC__bool FLAC__ogg_decoder_aspect_init(FLAC__OggDecoderAspect *aspect) 53c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 54c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* we will determine the serial number later if necessary */ 55c74663799493f2b1e6123c18def94295d0afab7Kenny Root if(ogg_stream_init(&aspect->stream_state, aspect->serial_number) != 0) 56c74663799493f2b1e6123c18def94295d0afab7Kenny Root return false; 57c74663799493f2b1e6123c18def94295d0afab7Kenny Root 58c74663799493f2b1e6123c18def94295d0afab7Kenny Root if(ogg_sync_init(&aspect->sync_state) != 0) 59c74663799493f2b1e6123c18def94295d0afab7Kenny Root return false; 60c74663799493f2b1e6123c18def94295d0afab7Kenny Root 61c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->version_major = ~(0u); 62c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->version_minor = ~(0u); 63c74663799493f2b1e6123c18def94295d0afab7Kenny Root 64c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->need_serial_number = aspect->use_first_serial_number; 65c74663799493f2b1e6123c18def94295d0afab7Kenny Root 66c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->end_of_stream = false; 67c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->have_working_page = false; 68c74663799493f2b1e6123c18def94295d0afab7Kenny Root 69c74663799493f2b1e6123c18def94295d0afab7Kenny Root return true; 70c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 71c74663799493f2b1e6123c18def94295d0afab7Kenny Root 72c74663799493f2b1e6123c18def94295d0afab7Kenny Rootvoid FLAC__ogg_decoder_aspect_finish(FLAC__OggDecoderAspect *aspect) 73c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 74c74663799493f2b1e6123c18def94295d0afab7Kenny Root (void)ogg_sync_clear(&aspect->sync_state); 75c74663799493f2b1e6123c18def94295d0afab7Kenny Root (void)ogg_stream_clear(&aspect->stream_state); 76c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 77c74663799493f2b1e6123c18def94295d0afab7Kenny Root 78c74663799493f2b1e6123c18def94295d0afab7Kenny Rootvoid FLAC__ogg_decoder_aspect_set_serial_number(FLAC__OggDecoderAspect *aspect, long value) 79c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 80c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->use_first_serial_number = false; 81c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->serial_number = value; 82c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 83c74663799493f2b1e6123c18def94295d0afab7Kenny Root 84c74663799493f2b1e6123c18def94295d0afab7Kenny Rootvoid FLAC__ogg_decoder_aspect_set_defaults(FLAC__OggDecoderAspect *aspect) 85c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 86c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->use_first_serial_number = true; 87c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 88c74663799493f2b1e6123c18def94295d0afab7Kenny Root 89c74663799493f2b1e6123c18def94295d0afab7Kenny Rootvoid FLAC__ogg_decoder_aspect_flush(FLAC__OggDecoderAspect *aspect) 90c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 91c74663799493f2b1e6123c18def94295d0afab7Kenny Root (void)ogg_stream_reset(&aspect->stream_state); 92c74663799493f2b1e6123c18def94295d0afab7Kenny Root (void)ogg_sync_reset(&aspect->sync_state); 93c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->end_of_stream = false; 94c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->have_working_page = false; 95c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 96c74663799493f2b1e6123c18def94295d0afab7Kenny Root 97c74663799493f2b1e6123c18def94295d0afab7Kenny Rootvoid FLAC__ogg_decoder_aspect_reset(FLAC__OggDecoderAspect *aspect) 98c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 99c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__ogg_decoder_aspect_flush(aspect); 100c74663799493f2b1e6123c18def94295d0afab7Kenny Root 101c74663799493f2b1e6123c18def94295d0afab7Kenny Root if(aspect->use_first_serial_number) 102c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->need_serial_number = true; 103c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 104c74663799493f2b1e6123c18def94295d0afab7Kenny Root 105c74663799493f2b1e6123c18def94295d0afab7Kenny RootFLAC__OggDecoderAspectReadStatus FLAC__ogg_decoder_aspect_read_callback_wrapper(FLAC__OggDecoderAspect *aspect, FLAC__byte buffer[], size_t *bytes, FLAC__OggDecoderAspectReadCallbackProxy read_callback, const FLAC__StreamDecoder *decoder, void *client_data) 106c74663799493f2b1e6123c18def94295d0afab7Kenny Root{ 107c74663799493f2b1e6123c18def94295d0afab7Kenny Root static const size_t OGG_BYTES_CHUNK = 8192; 108c74663799493f2b1e6123c18def94295d0afab7Kenny Root const size_t bytes_requested = *bytes; 109c74663799493f2b1e6123c18def94295d0afab7Kenny Root 110c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* 111c74663799493f2b1e6123c18def94295d0afab7Kenny Root * The FLAC decoding API uses pull-based reads, whereas Ogg decoding 112c74663799493f2b1e6123c18def94295d0afab7Kenny Root * is push-based. In libFLAC, when you ask to decode a frame, the 113c74663799493f2b1e6123c18def94295d0afab7Kenny Root * decoder will eventually call the read callback to supply some data, 114c74663799493f2b1e6123c18def94295d0afab7Kenny Root * but how much it asks for depends on how much free space it has in 115c74663799493f2b1e6123c18def94295d0afab7Kenny Root * its internal buffer. It does not try to grow its internal buffer 116c74663799493f2b1e6123c18def94295d0afab7Kenny Root * to accomodate a whole frame because then the internal buffer size 117c74663799493f2b1e6123c18def94295d0afab7Kenny Root * could not be limited, which is necessary in embedded applications. 118c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 119c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Ogg however grows its internal buffer until a whole page is present; 120c74663799493f2b1e6123c18def94295d0afab7Kenny Root * only then can you get decoded data out. So we can't just ask for 121c74663799493f2b1e6123c18def94295d0afab7Kenny Root * the same number of bytes from Ogg, then pass what's decoded down to 122c74663799493f2b1e6123c18def94295d0afab7Kenny Root * libFLAC. If what libFLAC is asking for will not contain a whole 123c74663799493f2b1e6123c18def94295d0afab7Kenny Root * page, then we will get no data from ogg_sync_pageout(), and at the 124c74663799493f2b1e6123c18def94295d0afab7Kenny Root * same time cannot just read more data from the client for the purpose 125c74663799493f2b1e6123c18def94295d0afab7Kenny Root * of getting a whole decoded page because the decoded size might be 126c74663799493f2b1e6123c18def94295d0afab7Kenny Root * larger than libFLAC's internal buffer. 127c74663799493f2b1e6123c18def94295d0afab7Kenny Root * 128c74663799493f2b1e6123c18def94295d0afab7Kenny Root * Instead, whenever this read callback wrapper is called, we will 129c74663799493f2b1e6123c18def94295d0afab7Kenny Root * continually request data from the client until we have at least one 130c74663799493f2b1e6123c18def94295d0afab7Kenny Root * page, and manage pages internally so that we can send pieces of 131c74663799493f2b1e6123c18def94295d0afab7Kenny Root * pages down to libFLAC in such a way that we obey its size 132c74663799493f2b1e6123c18def94295d0afab7Kenny Root * requirement. To limit the amount of callbacks, we will always try 133c74663799493f2b1e6123c18def94295d0afab7Kenny Root * to read in enough pages to return the full number of bytes 134c74663799493f2b1e6123c18def94295d0afab7Kenny Root * requested. 135c74663799493f2b1e6123c18def94295d0afab7Kenny Root */ 136c74663799493f2b1e6123c18def94295d0afab7Kenny Root *bytes = 0; 137c74663799493f2b1e6123c18def94295d0afab7Kenny Root while (*bytes < bytes_requested && !aspect->end_of_stream) { 138c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (aspect->have_working_page) { 139c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (aspect->have_working_packet) { 140c74663799493f2b1e6123c18def94295d0afab7Kenny Root size_t n = bytes_requested - *bytes; 141c74663799493f2b1e6123c18def94295d0afab7Kenny Root if ((size_t)aspect->working_packet.bytes <= n) { 142c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* the rest of the packet will fit in the buffer */ 143c74663799493f2b1e6123c18def94295d0afab7Kenny Root n = aspect->working_packet.bytes; 144c74663799493f2b1e6123c18def94295d0afab7Kenny Root memcpy(buffer, aspect->working_packet.packet, n); 145c74663799493f2b1e6123c18def94295d0afab7Kenny Root *bytes += n; 146c74663799493f2b1e6123c18def94295d0afab7Kenny Root buffer += n; 147c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->have_working_packet = false; 148c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 149c74663799493f2b1e6123c18def94295d0afab7Kenny Root else { 150c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* only n bytes of the packet will fit in the buffer */ 151c74663799493f2b1e6123c18def94295d0afab7Kenny Root memcpy(buffer, aspect->working_packet.packet, n); 152c74663799493f2b1e6123c18def94295d0afab7Kenny Root *bytes += n; 153c74663799493f2b1e6123c18def94295d0afab7Kenny Root buffer += n; 154c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->working_packet.packet += n; 155c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->working_packet.bytes -= n; 156c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 157c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 158c74663799493f2b1e6123c18def94295d0afab7Kenny Root else { 159c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* try and get another packet */ 160c74663799493f2b1e6123c18def94295d0afab7Kenny Root const int ret = ogg_stream_packetout(&aspect->stream_state, &aspect->working_packet); 161c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (ret > 0) { 162c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->have_working_packet = true; 163c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* if it is the first header packet, check for magic and a supported Ogg FLAC mapping version */ 164c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (aspect->working_packet.bytes > 0 && aspect->working_packet.packet[0] == FLAC__OGG_MAPPING_FIRST_HEADER_PACKET_TYPE) { 165c74663799493f2b1e6123c18def94295d0afab7Kenny Root const FLAC__byte *b = aspect->working_packet.packet; 166c74663799493f2b1e6123c18def94295d0afab7Kenny Root const unsigned header_length = 167c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__OGG_MAPPING_PACKET_TYPE_LENGTH + 168c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__OGG_MAPPING_MAGIC_LENGTH + 169c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__OGG_MAPPING_VERSION_MAJOR_LENGTH + 170c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__OGG_MAPPING_VERSION_MINOR_LENGTH + 171c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__OGG_MAPPING_NUM_HEADERS_LENGTH; 172c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (aspect->working_packet.bytes < (long)header_length) 173c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_NOT_FLAC; 174c74663799493f2b1e6123c18def94295d0afab7Kenny Root b += FLAC__OGG_MAPPING_PACKET_TYPE_LENGTH; 175c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (memcmp(b, FLAC__OGG_MAPPING_MAGIC, FLAC__OGG_MAPPING_MAGIC_LENGTH)) 176c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_NOT_FLAC; 177c74663799493f2b1e6123c18def94295d0afab7Kenny Root b += FLAC__OGG_MAPPING_MAGIC_LENGTH; 178c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->version_major = (unsigned)(*b); 179c74663799493f2b1e6123c18def94295d0afab7Kenny Root b += FLAC__OGG_MAPPING_VERSION_MAJOR_LENGTH; 180c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->version_minor = (unsigned)(*b); 181c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (aspect->version_major != 1) 182c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_UNSUPPORTED_MAPPING_VERSION; 183c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->working_packet.packet += header_length; 184c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->working_packet.bytes -= header_length; 185c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 186c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 187c74663799493f2b1e6123c18def94295d0afab7Kenny Root else if (ret == 0) { 188c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->have_working_page = false; 189c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 190c74663799493f2b1e6123c18def94295d0afab7Kenny Root else { /* ret < 0 */ 191c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* lost sync, we'll leave the working page for the next call */ 192c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_LOST_SYNC; 193c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 194c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 195c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 196c74663799493f2b1e6123c18def94295d0afab7Kenny Root else { 197c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* try and get another page */ 198c74663799493f2b1e6123c18def94295d0afab7Kenny Root const int ret = ogg_sync_pageout(&aspect->sync_state, &aspect->working_page); 199c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (ret > 0) { 200c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* got a page, grab the serial number if necessary */ 201c74663799493f2b1e6123c18def94295d0afab7Kenny Root if(aspect->need_serial_number) { 202c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->stream_state.serialno = aspect->serial_number = ogg_page_serialno(&aspect->working_page); 203c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->need_serial_number = false; 204c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 205c74663799493f2b1e6123c18def94295d0afab7Kenny Root if(ogg_stream_pagein(&aspect->stream_state, &aspect->working_page) == 0) { 206c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->have_working_page = true; 207c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->have_working_packet = false; 208c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 209c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* else do nothing, could be a page from another stream */ 210c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 211c74663799493f2b1e6123c18def94295d0afab7Kenny Root else if (ret == 0) { 212c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* need more data */ 213c74663799493f2b1e6123c18def94295d0afab7Kenny Root const size_t ogg_bytes_to_read = max(bytes_requested - *bytes, OGG_BYTES_CHUNK); 214c74663799493f2b1e6123c18def94295d0afab7Kenny Root char *oggbuf = ogg_sync_buffer(&aspect->sync_state, ogg_bytes_to_read); 215c74663799493f2b1e6123c18def94295d0afab7Kenny Root 216c74663799493f2b1e6123c18def94295d0afab7Kenny Root if(0 == oggbuf) { 217c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_MEMORY_ALLOCATION_ERROR; 218c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 219c74663799493f2b1e6123c18def94295d0afab7Kenny Root else { 220c74663799493f2b1e6123c18def94295d0afab7Kenny Root size_t ogg_bytes_read = ogg_bytes_to_read; 221c74663799493f2b1e6123c18def94295d0afab7Kenny Root 222c74663799493f2b1e6123c18def94295d0afab7Kenny Root switch(read_callback(decoder, (FLAC__byte*)oggbuf, &ogg_bytes_read, client_data)) { 223c74663799493f2b1e6123c18def94295d0afab7Kenny Root case FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK: 224c74663799493f2b1e6123c18def94295d0afab7Kenny Root break; 225c74663799493f2b1e6123c18def94295d0afab7Kenny Root case FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM: 226c74663799493f2b1e6123c18def94295d0afab7Kenny Root aspect->end_of_stream = true; 227c74663799493f2b1e6123c18def94295d0afab7Kenny Root break; 228c74663799493f2b1e6123c18def94295d0afab7Kenny Root case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT: 229c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT; 230c74663799493f2b1e6123c18def94295d0afab7Kenny Root default: 231c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__ASSERT(0); 232c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 233c74663799493f2b1e6123c18def94295d0afab7Kenny Root 234c74663799493f2b1e6123c18def94295d0afab7Kenny Root if(ogg_sync_wrote(&aspect->sync_state, ogg_bytes_read) < 0) { 235c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* double protection; this will happen if the read callback returns more bytes than the max requested, which would overflow Ogg's internal buffer */ 236c74663799493f2b1e6123c18def94295d0afab7Kenny Root FLAC__ASSERT(0); 237c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ERROR; 238c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 239c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 240c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 241c74663799493f2b1e6123c18def94295d0afab7Kenny Root else { /* ret < 0 */ 242c74663799493f2b1e6123c18def94295d0afab7Kenny Root /* lost sync, bail out */ 243c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_LOST_SYNC; 244c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 245c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 246c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 247c74663799493f2b1e6123c18def94295d0afab7Kenny Root 248c74663799493f2b1e6123c18def94295d0afab7Kenny Root if (aspect->end_of_stream && *bytes == 0) { 249c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM; 250c74663799493f2b1e6123c18def94295d0afab7Kenny Root } 251c74663799493f2b1e6123c18def94295d0afab7Kenny Root 252c74663799493f2b1e6123c18def94295d0afab7Kenny Root return FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK; 253c74663799493f2b1e6123c18def94295d0afab7Kenny Root} 254