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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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/filters/ffmpeg_audio_decoder.h" | 5 #include "media/filters/ffmpeg_audio_decoder.h" |
6 | 6 |
7 #include "base/callback_helpers.h" | 7 #include "base/callback_helpers.h" |
8 #include "base/single_thread_task_runner.h" | 8 #include "base/single_thread_task_runner.h" |
9 #include "media/base/audio_buffer.h" | 9 #include "media/base/audio_buffer.h" |
10 #include "media/base/audio_bus.h" | 10 #include "media/base/audio_bus.h" |
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35 #if defined(CHROMIUM_NO_AVFRAME_CHANNELS) | 35 #if defined(CHROMIUM_NO_AVFRAME_CHANNELS) |
36 // When use_system_ffmpeg==1, libav's AVFrame doesn't have channels field. | 36 // When use_system_ffmpeg==1, libav's AVFrame doesn't have channels field. |
37 return av_get_channel_layout_nb_channels(frame->channel_layout); | 37 return av_get_channel_layout_nb_channels(frame->channel_layout); |
38 #else | 38 #else |
39 return frame->channels; | 39 return frame->channels; |
40 #endif | 40 #endif |
41 } | 41 } |
42 | 42 |
43 // Called by FFmpeg's allocation routine to free a buffer. |opaque| is the | 43 // Called by FFmpeg's allocation routine to free a buffer. |opaque| is the |
44 // AudioBuffer allocated, so unref it. | 44 // AudioBuffer allocated, so unref it. |
45 static void ReleaseAudioBufferImpl(void* opaque, uint8* data) { | 45 static void ReleaseAudioBufferImpl(void* opaque, uint8_t* data) { |
46 scoped_refptr<AudioBuffer> buffer; | 46 scoped_refptr<AudioBuffer> buffer; |
47 buffer.swap(reinterpret_cast<AudioBuffer**>(&opaque)); | 47 buffer.swap(reinterpret_cast<AudioBuffer**>(&opaque)); |
48 } | 48 } |
49 | 49 |
50 // Called by FFmpeg's allocation routine to allocate a buffer. Uses | 50 // Called by FFmpeg's allocation routine to allocate a buffer. Uses |
51 // AVCodecContext.opaque to get the object reference in order to call | 51 // AVCodecContext.opaque to get the object reference in order to call |
52 // GetAudioBuffer() to do the actual allocation. | 52 // GetAudioBuffer() to do the actual allocation. |
53 static int GetAudioBuffer(struct AVCodecContext* s, AVFrame* frame, int flags) { | 53 static int GetAudioBuffer(struct AVCodecContext* s, AVFrame* frame, int flags) { |
54 DCHECK(s->codec->capabilities & CODEC_CAP_DR1); | 54 DCHECK(s->codec->capabilities & CODEC_CAP_DR1); |
55 DCHECK_EQ(s->codec_type, AVMEDIA_TYPE_AUDIO); | 55 DCHECK_EQ(s->codec_type, AVMEDIA_TYPE_AUDIO); |
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101 // allocated for AudioBuffer. |number_of_planes| will be 1 for interleaved | 101 // allocated for AudioBuffer. |number_of_planes| will be 1 for interleaved |
102 // audio and equal to |channels| for planar audio. | 102 // audio and equal to |channels| for planar audio. |
103 int number_of_planes = buffer->channel_data().size(); | 103 int number_of_planes = buffer->channel_data().size(); |
104 if (number_of_planes <= AV_NUM_DATA_POINTERS) { | 104 if (number_of_planes <= AV_NUM_DATA_POINTERS) { |
105 DCHECK_EQ(frame->extended_data, frame->data); | 105 DCHECK_EQ(frame->extended_data, frame->data); |
106 for (int i = 0; i < number_of_planes; ++i) | 106 for (int i = 0; i < number_of_planes; ++i) |
107 frame->data[i] = buffer->channel_data()[i]; | 107 frame->data[i] = buffer->channel_data()[i]; |
108 } else { | 108 } else { |
109 // There are more channels than can fit into data[], so allocate | 109 // There are more channels than can fit into data[], so allocate |
110 // extended_data[] and fill appropriately. | 110 // extended_data[] and fill appropriately. |
111 frame->extended_data = static_cast<uint8**>( | 111 frame->extended_data = static_cast<uint8_t**>( |
112 av_malloc(number_of_planes * sizeof(*frame->extended_data))); | 112 av_malloc(number_of_planes * sizeof(*frame->extended_data))); |
113 int i = 0; | 113 int i = 0; |
114 for (; i < AV_NUM_DATA_POINTERS; ++i) | 114 for (; i < AV_NUM_DATA_POINTERS; ++i) |
115 frame->extended_data[i] = frame->data[i] = buffer->channel_data()[i]; | 115 frame->extended_data[i] = frame->data[i] = buffer->channel_data()[i]; |
116 for (; i < number_of_planes; ++i) | 116 for (; i < number_of_planes; ++i) |
117 frame->extended_data[i] = buffer->channel_data()[i]; | 117 frame->extended_data[i] = buffer->channel_data()[i]; |
118 } | 118 } |
119 | 119 |
120 // Now create an AVBufferRef for the data just allocated. It will own the | 120 // Now create an AVBufferRef for the data just allocated. It will own the |
121 // reference to the AudioBuffer object. | 121 // reference to the AudioBuffer object. |
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244 const scoped_refptr<DecoderBuffer>& buffer, | 244 const scoped_refptr<DecoderBuffer>& buffer, |
245 bool* has_produced_frame) { | 245 bool* has_produced_frame) { |
246 DCHECK(!*has_produced_frame); | 246 DCHECK(!*has_produced_frame); |
247 | 247 |
248 AVPacket packet; | 248 AVPacket packet; |
249 av_init_packet(&packet); | 249 av_init_packet(&packet); |
250 if (buffer->end_of_stream()) { | 250 if (buffer->end_of_stream()) { |
251 packet.data = NULL; | 251 packet.data = NULL; |
252 packet.size = 0; | 252 packet.size = 0; |
253 } else { | 253 } else { |
254 packet.data = const_cast<uint8*>(buffer->data()); | 254 packet.data = const_cast<uint8_t*>(buffer->data()); |
255 packet.size = buffer->data_size(); | 255 packet.size = buffer->data_size(); |
256 } | 256 } |
257 | 257 |
258 // Each audio packet may contain several frames, so we must call the decoder | 258 // Each audio packet may contain several frames, so we must call the decoder |
259 // until we've exhausted the packet. Regardless of the packet size we always | 259 // until we've exhausted the packet. Regardless of the packet size we always |
260 // want to hand it to the decoder at least once, otherwise we would end up | 260 // want to hand it to the decoder at least once, otherwise we would end up |
261 // skipping end of stream packets since they have a size of zero. | 261 // skipping end of stream packets since they have a size of zero. |
262 do { | 262 do { |
263 int frame_decoded = 0; | 263 int frame_decoded = 0; |
264 const int result = avcodec_decode_audio4( | 264 const int result = avcodec_decode_audio4( |
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385 return true; | 385 return true; |
386 } | 386 } |
387 | 387 |
388 void FFmpegAudioDecoder::ResetTimestampState() { | 388 void FFmpegAudioDecoder::ResetTimestampState() { |
389 discard_helper_.reset(new AudioDiscardHelper(config_.samples_per_second(), | 389 discard_helper_.reset(new AudioDiscardHelper(config_.samples_per_second(), |
390 config_.codec_delay())); | 390 config_.codec_delay())); |
391 discard_helper_->Reset(config_.codec_delay()); | 391 discard_helper_->Reset(config_.codec_delay()); |
392 } | 392 } |
393 | 393 |
394 } // namespace media | 394 } // namespace media |
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