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74 lines
2.2 KiB
C++
74 lines
2.2 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef __FFmpegH264Decoder_h__
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#define __FFmpegH264Decoder_h__
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#include "FFmpegDataDecoder.h"
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namespace mozilla
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{
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template <int V>
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class FFmpegH264Decoder : public FFmpegDataDecoder<V>
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{
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};
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template <>
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class FFmpegH264Decoder<LIBAV_VER> : public FFmpegDataDecoder<LIBAV_VER>
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{
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typedef mozilla::layers::Image Image;
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typedef mozilla::layers::ImageContainer ImageContainer;
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enum DecodeResult {
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DECODE_FRAME,
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DECODE_NO_FRAME,
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DECODE_ERROR
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};
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public:
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FFmpegH264Decoder(FlushableTaskQueue* aTaskQueue,
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MediaDataDecoderCallback* aCallback,
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const VideoInfo& aConfig,
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ImageContainer* aImageContainer);
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virtual ~FFmpegH264Decoder();
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nsRefPtr<InitPromise> Init() override;
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nsresult Input(MediaRawData* aSample) override;
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void ProcessDrain() override;
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static AVCodecID GetCodecId(const nsACString& aMimeType);
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private:
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void DecodeFrame(MediaRawData* aSample);
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DecodeResult DoDecodeFrame(MediaRawData* aSample);
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DecodeResult DoDecodeFrame(MediaRawData* aSample, uint8_t* aData, int aSize);
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void DoDrain();
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void OutputDelayedFrames();
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/**
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* This method allocates a buffer for FFmpeg's decoder, wrapped in an Image.
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* Currently it only supports Planar YUV420, which appears to be the only
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* non-hardware accelerated image format that FFmpeg's H264 decoder is
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* capable of outputting.
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*/
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int AllocateYUV420PVideoBuffer(AVCodecContext* aCodecContext,
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AVFrame* aFrame);
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static int AllocateBufferCb(AVCodecContext* aCodecContext, AVFrame* aFrame);
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static void ReleaseBufferCb(AVCodecContext* aCodecContext, AVFrame* aFrame);
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int64_t GetPts(const AVPacket& packet);
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nsRefPtr<ImageContainer> mImageContainer;
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uint32_t mPictureWidth;
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uint32_t mPictureHeight;
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uint32_t mDisplayWidth;
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uint32_t mDisplayHeight;
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};
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} // namespace mozilla
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#endif // __FFmpegH264Decoder_h__
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