зеркало из https://github.com/mozilla/gecko-dev.git
78 строки
2.2 KiB
C++
78 строки
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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#if !defined(VPXDecoder_h_)
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#define VPXDecoder_h_
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#include "PlatformDecoderModule.h"
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#include "mozilla/Span.h"
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#include <stdint.h>
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#define VPX_DONT_DEFINE_STDINT_TYPES
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#include "vpx/vp8dx.h"
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#include "vpx/vpx_codec.h"
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#include "vpx/vpx_decoder.h"
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namespace mozilla {
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class VPXDecoder : public MediaDataDecoder
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{
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public:
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explicit VPXDecoder(const CreateDecoderParams& aParams);
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RefPtr<InitPromise> Init() override;
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RefPtr<DecodePromise> Decode(MediaRawData* aSample) override;
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RefPtr<DecodePromise> Drain() override;
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RefPtr<FlushPromise> Flush() override;
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RefPtr<ShutdownPromise> Shutdown() override;
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const char* GetDescriptionName() const override
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{
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return "libvpx video decoder";
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}
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enum Codec: uint8_t
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{
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VP8 = 1 << 0,
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VP9 = 1 << 1,
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Unknown = 1 << 7,
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};
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// Return true if aMimeType is a one of the strings used by our demuxers to
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// identify VPX of the specified type. Does not parse general content type
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// strings, i.e. white space matters.
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static bool IsVPX(const nsACString& aMimeType, uint8_t aCodecMask=VP8|VP9);
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static bool IsVP8(const nsACString& aMimeType);
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static bool IsVP9(const nsACString& aMimeType);
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// Return true if a sample is a keyframe for the specified codec.
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static bool IsKeyframe(Span<const uint8_t> aBuffer, Codec aCodec);
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// Return the frame dimensions for a sample for the specified codec.
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static nsIntSize GetFrameSize(Span<const uint8_t> aBuffer, Codec aCodec);
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private:
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~VPXDecoder();
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RefPtr<DecodePromise> ProcessDecode(MediaRawData* aSample);
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MediaResult DecodeAlpha(vpx_image_t** aImgAlpha, const MediaRawData* aSample);
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const RefPtr<layers::ImageContainer> mImageContainer;
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RefPtr<layers::KnowsCompositor> mImageAllocator;
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const RefPtr<TaskQueue> mTaskQueue;
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// VPx decoder state
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vpx_codec_ctx_t mVPX;
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// VPx alpha decoder state
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vpx_codec_ctx_t mVPXAlpha;
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const VideoInfo& mInfo;
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const Codec mCodec;
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};
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} // namespace mozilla
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#endif
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