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| 1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 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 #ifndef SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_ | 5 #ifndef SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_ |
| 6 #define SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_ | 6 #define SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_ |
| 7 | 7 |
| 8 #include "services/media/framework/lpcm_util.h" | 8 #include "services/media/framework/lpcm_util.h" |
| 9 #include "services/media/framework_ffmpeg/ffmpeg_decoder_base.h" | 9 #include "services/media/framework_ffmpeg/ffmpeg_decoder_base.h" |
| 10 | 10 |
| 11 namespace mojo { | 11 namespace mojo { |
| 12 namespace media { | 12 namespace media { |
| 13 | 13 |
| 14 // Decoder implementation employing an ffmpeg audio decoder. | 14 // Decoder implementation employing an ffmpeg audio decoder. |
| 15 class FfmpegAudioDecoder : public FfmpegDecoderBase { | 15 class FfmpegAudioDecoder : public FfmpegDecoderBase { |
| 16 public: | 16 public: |
| 17 FfmpegAudioDecoder(AvCodecContextPtr av_codec_context); | 17 FfmpegAudioDecoder(AvCodecContextPtr av_codec_context); |
| 18 | 18 |
| 19 ~FfmpegAudioDecoder() override; | 19 ~FfmpegAudioDecoder() override; |
| 20 | 20 |
| 21 protected: | 21 protected: |
| 22 // FfmpegDecoderBase overrides. | 22 // FfmpegDecoderBase overrides. |
| 23 void Flush() override; | 23 void Flush() override; |
| 24 | 24 |
| 25 int Decode( | 25 int Decode(const AVPacket& av_packet, |
| 26 const AVPacket& av_packet, | 26 const ffmpeg::AvFramePtr& av_frame_ptr, |
| 27 const ffmpeg::AvFramePtr& av_frame_ptr, | 27 PayloadAllocator* allocator, |
| 28 PayloadAllocator* allocator, | 28 bool* frame_decoded_out) override; |
| 29 bool* frame_decoded_out) override; | |
| 30 | 29 |
| 31 PacketPtr CreateOutputPacket( | 30 PacketPtr CreateOutputPacket(const AVFrame& av_frame, |
| 32 const AVFrame& av_frame, | 31 PayloadAllocator* allocator) override; |
| 33 PayloadAllocator* allocator) override; | |
| 34 | 32 |
| 35 PacketPtr CreateOutputEndOfStreamPacket() override; | 33 PacketPtr CreateOutputEndOfStreamPacket() override; |
| 36 | 34 |
| 37 private: | 35 private: |
| 38 // Used to control deallocation of buffers. | 36 // Used to control deallocation of buffers. |
| 39 class AvBufferContext { | 37 class AvBufferContext { |
| 40 public: | 38 public: |
| 41 AvBufferContext(size_t size, PayloadAllocator* allocator) : | 39 AvBufferContext(size_t size, PayloadAllocator* allocator) |
| 42 size_(size), | 40 : size_(size), allocator_(allocator) { |
| 43 allocator_(allocator) { | |
| 44 DCHECK(allocator_); | 41 DCHECK(allocator_); |
| 45 if (size_ == 0) { | 42 if (size_ == 0) { |
| 46 buffer_ = nullptr; | 43 buffer_ = nullptr; |
| 47 } else { | 44 } else { |
| 48 buffer_ = static_cast<uint8_t*>( | 45 buffer_ = |
| 49 allocator_->AllocatePayloadBuffer(size_)); | 46 static_cast<uint8_t*>(allocator_->AllocatePayloadBuffer(size_)); |
| 50 } | 47 } |
| 51 } | 48 } |
| 52 | 49 |
| 53 ~AvBufferContext() { | 50 ~AvBufferContext() { |
| 54 if (allocator_ == nullptr) { | 51 if (allocator_ == nullptr) { |
| 55 // Previously released. | 52 // Previously released. |
| 56 return; | 53 return; |
| 57 } | 54 } |
| 58 | 55 |
| 59 if (size_ != 0) { | 56 if (size_ != 0) { |
| (...skipping 25 matching lines...) Expand all Loading... |
| 85 PayloadAllocator* allocator_; | 82 PayloadAllocator* allocator_; |
| 86 }; | 83 }; |
| 87 | 84 |
| 88 // Align sample buffers on 32-byte boundaries. This is the value that Chromium | 85 // Align sample buffers on 32-byte boundaries. This is the value that Chromium |
| 89 // uses and is supposed to work for all processor architectures. Strangely, if | 86 // uses and is supposed to work for all processor architectures. Strangely, if |
| 90 // we were to tell ffmpeg to use the default (by passing 0), it aligns on 32 | 87 // we were to tell ffmpeg to use the default (by passing 0), it aligns on 32 |
| 91 // sample (not byte) boundaries. | 88 // sample (not byte) boundaries. |
| 92 static const int kChannelAlign = 32; | 89 static const int kChannelAlign = 32; |
| 93 | 90 |
| 94 // Callback used by the ffmpeg decoder to acquire a buffer. | 91 // Callback used by the ffmpeg decoder to acquire a buffer. |
| 95 static int AllocateBufferForAvFrame( | 92 static int AllocateBufferForAvFrame(AVCodecContext* av_codec_context, |
| 96 AVCodecContext* av_codec_context, | 93 AVFrame* av_frame, |
| 97 AVFrame* av_frame, | 94 int flags); |
| 98 int flags); | |
| 99 | 95 |
| 100 // Callback used by the ffmpeg decoder to release a buffer. | 96 // Callback used by the ffmpeg decoder to release a buffer. |
| 101 static void ReleaseBufferForAvFrame(void* opaque, uint8_t* buffer); | 97 static void ReleaseBufferForAvFrame(void* opaque, uint8_t* buffer); |
| 102 | 98 |
| 103 // The allocator used by avcodec_decode_audio4 to provide context for | 99 // The allocator used by avcodec_decode_audio4 to provide context for |
| 104 // AllocateBufferForAvFrame. This is set only during the call to | 100 // AllocateBufferForAvFrame. This is set only during the call to |
| 105 // avcodec_decode_audio4. | 101 // avcodec_decode_audio4. |
| 106 PayloadAllocator* allocator_; | 102 PayloadAllocator* allocator_; |
| 107 | 103 |
| 108 // For interleaving, if needed. | 104 // For interleaving, if needed. |
| 109 std::unique_ptr<LpcmUtil> lpcm_util_; | 105 std::unique_ptr<LpcmUtil> lpcm_util_; |
| 110 | 106 |
| 111 // For interleaving, if needed. | 107 // For interleaving, if needed. |
| 112 std::unique_ptr<StreamType> stream_type_; | 108 std::unique_ptr<StreamType> stream_type_; |
| 113 | 109 |
| 114 // Used to supply missing PTS. | 110 // Used to supply missing PTS. |
| 115 int64_t next_pts_= Packet::kUnknownPts; | 111 int64_t next_pts_ = Packet::kUnknownPts; |
| 116 }; | 112 }; |
| 117 | 113 |
| 118 } // namespace media | 114 } // namespace media |
| 119 } // namespace mojo | 115 } // namespace mojo |
| 120 | 116 |
| 121 #endif // SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_ | 117 #endif // SERVICES_MEDIA_FRAMEWORK_FFMPEG_FFMPEG_AUDIO_DECODER_H_ |
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