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| 1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
| 4 | 4 |
| 5 #include "media/formats/mp2t/es_parser_mpeg1audio.h" | 5 #include "media/formats/mp2t/es_parser_mpeg1audio.h" |
| 6 | 6 |
| 7 | 7 |
| 8 #include "base/basictypes.h" | 8 #include "base/basictypes.h" |
| 9 #include "base/bind.h" | 9 #include "base/bind.h" |
| 10 #include "base/logging.h" | 10 #include "base/logging.h" |
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| 31 // Number of samples in the frame. | 31 // Number of samples in the frame. |
| 32 int sample_count; | 32 int sample_count; |
| 33 | 33 |
| 34 // Frame offset in the ES queue. | 34 // Frame offset in the ES queue. |
| 35 int64 queue_offset; | 35 int64 queue_offset; |
| 36 }; | 36 }; |
| 37 | 37 |
| 38 EsParserMpeg1Audio::EsParserMpeg1Audio( | 38 EsParserMpeg1Audio::EsParserMpeg1Audio( |
| 39 const NewAudioConfigCB& new_audio_config_cb, | 39 const NewAudioConfigCB& new_audio_config_cb, |
| 40 const EmitBufferCB& emit_buffer_cb, | 40 const EmitBufferCB& emit_buffer_cb, |
| 41 const LogCB& log_cb) | 41 const scoped_refptr<MediaLog>& media_log) |
| 42 : log_cb_(log_cb), | 42 : media_log_(media_log), |
| 43 new_audio_config_cb_(new_audio_config_cb), | 43 new_audio_config_cb_(new_audio_config_cb), |
| 44 emit_buffer_cb_(emit_buffer_cb) { | 44 emit_buffer_cb_(emit_buffer_cb) { |
| 45 } | 45 } |
| 46 | 46 |
| 47 EsParserMpeg1Audio::~EsParserMpeg1Audio() { | 47 EsParserMpeg1Audio::~EsParserMpeg1Audio() { |
| 48 } | 48 } |
| 49 | 49 |
| 50 bool EsParserMpeg1Audio::ParseFromEsQueue() { | 50 bool EsParserMpeg1Audio::ParseFromEsQueue() { |
| 51 // Look for every MPEG1 audio frame in the ES buffer. | 51 // Look for every MPEG1 audio frame in the ES buffer. |
| 52 Mpeg1AudioFrame mpeg1audio_frame; | 52 Mpeg1AudioFrame mpeg1audio_frame; |
| 53 while (LookForMpeg1AudioFrame(&mpeg1audio_frame)) { | 53 while (LookForMpeg1AudioFrame(&mpeg1audio_frame)) { |
| 54 // Update the audio configuration if needed. | 54 // Update the audio configuration if needed. |
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| 115 return false; | 115 return false; |
| 116 | 116 |
| 117 for (int offset = 0; offset < max_offset; offset++) { | 117 for (int offset = 0; offset < max_offset; offset++) { |
| 118 const uint8* cur_buf = &es[offset]; | 118 const uint8* cur_buf = &es[offset]; |
| 119 if (cur_buf[0] != 0xff) | 119 if (cur_buf[0] != 0xff) |
| 120 continue; | 120 continue; |
| 121 | 121 |
| 122 int remaining_size = es_size - offset; | 122 int remaining_size = es_size - offset; |
| 123 DCHECK_GE(remaining_size, MPEG1AudioStreamParser::kHeaderSize); | 123 DCHECK_GE(remaining_size, MPEG1AudioStreamParser::kHeaderSize); |
| 124 MPEG1AudioStreamParser::Header header; | 124 MPEG1AudioStreamParser::Header header; |
| 125 if (!MPEG1AudioStreamParser::ParseHeader(log_cb_, cur_buf, &header)) | 125 if (!MPEG1AudioStreamParser::ParseHeader(media_log_, cur_buf, &header)) |
| 126 continue; | 126 continue; |
| 127 | 127 |
| 128 if (remaining_size < header.frame_size) { | 128 if (remaining_size < header.frame_size) { |
| 129 // Not a full frame: will resume when we have more data. | 129 // Not a full frame: will resume when we have more data. |
| 130 // Remove all the bytes located before the frame header, | 130 // Remove all the bytes located before the frame header, |
| 131 // these bytes will not be used anymore. | 131 // these bytes will not be used anymore. |
| 132 es_queue_->Pop(offset); | 132 es_queue_->Pop(offset); |
| 133 return false; | 133 return false; |
| 134 } | 134 } |
| 135 | 135 |
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| 155 return true; | 155 return true; |
| 156 } | 156 } |
| 157 | 157 |
| 158 es_queue_->Pop(max_offset); | 158 es_queue_->Pop(max_offset); |
| 159 return false; | 159 return false; |
| 160 } | 160 } |
| 161 | 161 |
| 162 bool EsParserMpeg1Audio::UpdateAudioConfiguration( | 162 bool EsParserMpeg1Audio::UpdateAudioConfiguration( |
| 163 const uint8* mpeg1audio_header) { | 163 const uint8* mpeg1audio_header) { |
| 164 MPEG1AudioStreamParser::Header header; | 164 MPEG1AudioStreamParser::Header header; |
| 165 if (!MPEG1AudioStreamParser::ParseHeader(log_cb_, | 165 if (!MPEG1AudioStreamParser::ParseHeader(media_log_, mpeg1audio_header, |
| 166 mpeg1audio_header, | |
| 167 &header)) { | 166 &header)) { |
| 168 return false; | 167 return false; |
| 169 } | 168 } |
| 170 | 169 |
| 171 // TODO(damienv): Verify whether Android playback requires the extra data | 170 // TODO(damienv): Verify whether Android playback requires the extra data |
| 172 // field for Mpeg1 audio. If yes, we should generate this field. | 171 // field for Mpeg1 audio. If yes, we should generate this field. |
| 173 AudioDecoderConfig audio_decoder_config( | 172 AudioDecoderConfig audio_decoder_config( |
| 174 kCodecMP3, | 173 kCodecMP3, |
| 175 kSampleFormatS16, | 174 kSampleFormatS16, |
| 176 header.channel_layout, | 175 header.channel_layout, |
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| 201 } | 200 } |
| 202 | 201 |
| 203 void EsParserMpeg1Audio::SkipMpeg1AudioFrame( | 202 void EsParserMpeg1Audio::SkipMpeg1AudioFrame( |
| 204 const Mpeg1AudioFrame& mpeg1audio_frame) { | 203 const Mpeg1AudioFrame& mpeg1audio_frame) { |
| 205 DCHECK_EQ(mpeg1audio_frame.queue_offset, es_queue_->head()); | 204 DCHECK_EQ(mpeg1audio_frame.queue_offset, es_queue_->head()); |
| 206 es_queue_->Pop(mpeg1audio_frame.size); | 205 es_queue_->Pop(mpeg1audio_frame.size); |
| 207 } | 206 } |
| 208 | 207 |
| 209 } // namespace mp2t | 208 } // namespace mp2t |
| 210 } // namespace media | 209 } // namespace media |
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