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1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2010 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 "media/base/callback.h" | 7 #include "media/base/callback.h" |
8 #include "media/base/data_buffer.h" | 8 #include "media/base/data_buffer.h" |
9 #include "media/base/limits.h" | 9 #include "media/base/limits.h" |
10 #include "media/ffmpeg/ffmpeg_common.h" | 10 #include "media/ffmpeg/ffmpeg_common.h" |
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43 | 43 |
44 // Get the AVStream by querying for the provider interface. | 44 // Get the AVStream by querying for the provider interface. |
45 AVStreamProvider* av_stream_provider; | 45 AVStreamProvider* av_stream_provider; |
46 if (!demuxer_stream->QueryInterface(&av_stream_provider)) { | 46 if (!demuxer_stream->QueryInterface(&av_stream_provider)) { |
47 return; | 47 return; |
48 } | 48 } |
49 AVStream* av_stream = av_stream_provider->GetAVStream(); | 49 AVStream* av_stream = av_stream_provider->GetAVStream(); |
50 | 50 |
51 // Grab the AVStream's codec context and make sure we have sensible values. | 51 // Grab the AVStream's codec context and make sure we have sensible values. |
52 codec_context_ = av_stream->codec; | 52 codec_context_ = av_stream->codec; |
53 int bps = av_get_bits_per_sample_format(codec_context_->sample_fmt); | 53 int bps = av_get_bits_per_sample_fmt(codec_context_->sample_fmt); |
54 if (codec_context_->channels <= 0 || | 54 if (codec_context_->channels <= 0 || |
55 codec_context_->channels > Limits::kMaxChannels || | 55 codec_context_->channels > Limits::kMaxChannels || |
56 bps <= 0 || bps > Limits::kMaxBitsPerSample || | 56 bps <= 0 || bps > Limits::kMaxBitsPerSample || |
57 codec_context_->sample_rate <= 0 || | 57 codec_context_->sample_rate <= 0 || |
58 codec_context_->sample_rate > Limits::kMaxSampleRate) { | 58 codec_context_->sample_rate > Limits::kMaxSampleRate) { |
59 DLOG(WARNING) << "Invalid audio stream -" | 59 DLOG(WARNING) << "Invalid audio stream -" |
60 << " channels: " << codec_context_->channels | 60 << " channels: " << codec_context_->channels |
61 << " bps: " << bps | 61 << " bps: " << bps |
62 << " sample rate: " << codec_context_->sample_rate; | 62 << " sample rate: " << codec_context_->sample_rate; |
63 return; | 63 return; |
64 } | 64 } |
65 | 65 |
66 // Serialize calls to avcodec_open(). | 66 // Serialize calls to avcodec_open(). |
67 AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id); | 67 AVCodec* codec = avcodec_find_decoder(codec_context_->codec_id); |
68 if (!codec || avcodec_open(codec_context_, codec) < 0) { | 68 if (!codec || avcodec_open(codec_context_, codec) < 0) { |
69 return; | 69 return; |
70 } | 70 } |
71 | 71 |
72 // When calling avcodec_find_decoder(), |codec_context_| might be altered by | 72 // When calling avcodec_find_decoder(), |codec_context_| might be altered by |
73 // the decoder to give more accurate values of the output format of the | 73 // the decoder to give more accurate values of the output format of the |
74 // decoder. So set the media format after a decoder is allocated. | 74 // decoder. So set the media format after a decoder is allocated. |
75 // TODO(hclam): Reuse the information provided by the demuxer for now, we may | 75 // TODO(hclam): Reuse the information provided by the demuxer for now, we may |
76 // need to wait until the first buffer is decoded to know the correct | 76 // need to wait until the first buffer is decoded to know the correct |
77 // information. | 77 // information. |
78 media_format_.SetAsInteger(MediaFormat::kChannels, codec_context_->channels); | 78 media_format_.SetAsInteger(MediaFormat::kChannels, codec_context_->channels); |
79 media_format_.SetAsInteger(MediaFormat::kSampleBits, | 79 media_format_.SetAsInteger(MediaFormat::kSampleBits, |
80 av_get_bits_per_sample_format(codec_context_->sample_fmt)); | 80 av_get_bits_per_sample_fmt(codec_context_->sample_fmt)); |
81 media_format_.SetAsInteger(MediaFormat::kSampleRate, | 81 media_format_.SetAsInteger(MediaFormat::kSampleRate, |
82 codec_context_->sample_rate); | 82 codec_context_->sample_rate); |
83 media_format_.SetAsString(MediaFormat::kMimeType, | 83 media_format_.SetAsString(MediaFormat::kMimeType, |
84 mime_type::kUncompressedAudio); | 84 mime_type::kUncompressedAudio); |
85 | 85 |
86 // Prepare the output buffer. | 86 // Prepare the output buffer. |
87 output_buffer_.reset(static_cast<uint8*>(av_malloc(kOutputBufferSize))); | 87 output_buffer_.reset(static_cast<uint8*>(av_malloc(kOutputBufferSize))); |
88 if (!output_buffer_.get()) { | 88 if (!output_buffer_.get()) { |
89 host()->SetError(PIPELINE_ERROR_OUT_OF_MEMORY); | 89 host()->SetError(PIPELINE_ERROR_OUT_OF_MEMORY); |
90 return; | 90 return; |
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238 DataBuffer* result_buffer = new DataBuffer(0); | 238 DataBuffer* result_buffer = new DataBuffer(0); |
239 result_buffer->SetTimestamp(input->GetTimestamp()); | 239 result_buffer->SetTimestamp(input->GetTimestamp()); |
240 result_buffer->SetDuration(input->GetDuration()); | 240 result_buffer->SetDuration(input->GetDuration()); |
241 EnqueueResult(result_buffer); | 241 EnqueueResult(result_buffer); |
242 } | 242 } |
243 DecoderBase<AudioDecoder, Buffer>::OnDecodeComplete(); | 243 DecoderBase<AudioDecoder, Buffer>::OnDecodeComplete(); |
244 } | 244 } |
245 | 245 |
246 base::TimeDelta FFmpegAudioDecoder::CalculateDuration(size_t size) { | 246 base::TimeDelta FFmpegAudioDecoder::CalculateDuration(size_t size) { |
247 int64 denominator = codec_context_->channels * | 247 int64 denominator = codec_context_->channels * |
248 av_get_bits_per_sample_format(codec_context_->sample_fmt) / 8 * | 248 av_get_bits_per_sample_fmt(codec_context_->sample_fmt) / 8 * |
249 codec_context_->sample_rate; | 249 codec_context_->sample_rate; |
250 double microseconds = size / | 250 double microseconds = size / |
251 (denominator / static_cast<double>(base::Time::kMicrosecondsPerSecond)); | 251 (denominator / static_cast<double>(base::Time::kMicrosecondsPerSecond)); |
252 return base::TimeDelta::FromMicroseconds(static_cast<int64>(microseconds)); | 252 return base::TimeDelta::FromMicroseconds(static_cast<int64>(microseconds)); |
253 } | 253 } |
254 | 254 |
255 } // namespace | 255 } // namespace |
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