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2a45c11cd9
MozReview-Commit-ID: Jmyrf7d8hGW --HG-- extra : rebase_source : 5fef879c0f2847a98e72ae8a30e176bdeea3b780
100 lines
3.2 KiB
C++
100 lines
3.2 KiB
C++
/* 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 __FFmpegLibWrapper_h__
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#define __FFmpegLibWrapper_h__
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#include "mozilla/Attributes.h"
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#include "mozilla/Types.h"
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struct AVCodec;
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struct AVCodecContext;
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struct AVFrame;
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struct AVPacket;
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struct AVDictionary;
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struct AVCodecParserContext;
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struct PRLibrary;
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namespace mozilla {
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struct MOZ_ONLY_USED_TO_AVOID_STATIC_CONSTRUCTORS FFmpegLibWrapper
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{
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// The class is used only in static storage and so is zero initialized.
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FFmpegLibWrapper() = default;
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// The libraries are not unloaded in the destructor, because doing so would
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// require a static constructor to register the static destructor. As the
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// class is in static storage, the destructor would only run on shutdown
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// anyway.
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~FFmpegLibWrapper() = default;
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enum class LinkResult
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{
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Success,
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NoProvidedLib,
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NoAVCodecVersion,
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CannotUseLibAV57,
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BlockedOldLibAVVersion,
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UnknownFutureLibAVVersion,
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UnknownFutureFFMpegVersion,
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UnknownOlderFFMpegVersion,
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MissingFFMpegFunction,
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MissingLibAVFunction,
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};
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// Examine mAVCodecLib and mAVUtilLib, and attempt to resolve all symbols.
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// Upon failure, the entire object will be reset and any attached libraries
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// will be unlinked.
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LinkResult Link();
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// Reset the wrapper and unlink all attached libraries.
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void Unlink();
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// indicate the version of libavcodec linked to.
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// 0 indicates that the function wasn't initialized with Link().
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int mVersion;
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// libavcodec
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unsigned (*avcodec_version)();
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int (*av_lockmgr_register)(int (*cb)(void** mutex, int op));
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AVCodecContext* (*avcodec_alloc_context3)(const AVCodec* codec);
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int (*avcodec_close)(AVCodecContext* avctx);
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int (*avcodec_decode_audio4)(AVCodecContext* avctx, AVFrame* frame, int* got_frame_ptr, const AVPacket* avpkt);
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int (*avcodec_decode_video2)(AVCodecContext* avctx, AVFrame* picture, int* got_picture_ptr, const AVPacket* avpkt);
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AVCodec* (*avcodec_find_decoder)(int id);
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void (*avcodec_flush_buffers)(AVCodecContext *avctx);
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int (*avcodec_open2)(AVCodecContext *avctx, const AVCodec* codec, AVDictionary** options);
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void (*avcodec_register_all)();
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void (*av_init_packet)(AVPacket* pkt);
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AVCodecParserContext* (*av_parser_init)(int codec_id);
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void (*av_parser_close)(AVCodecParserContext* s);
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int (*av_parser_parse2)(AVCodecParserContext* s, AVCodecContext* avctx, uint8_t** poutbuf, int* poutbuf_size, const uint8_t* buf, int buf_size, int64_t pts, int64_t dts, int64_t pos);
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// only used in libavcodec <= 54
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AVFrame* (*avcodec_alloc_frame)();
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void (*avcodec_get_frame_defaults)(AVFrame* pic);
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// libavcodec v54 only
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void (*avcodec_free_frame)(AVFrame** frame);
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// libavutil
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void (*av_log_set_level)(int level);
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void* (*av_malloc)(size_t size);
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void (*av_freep)(void *ptr);
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// libavutil v55 and later only
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AVFrame* (*av_frame_alloc)();
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void (*av_frame_free)(AVFrame** frame);
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void (*av_frame_unref)(AVFrame* frame);
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// libavutil optional
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int (*av_frame_get_colorspace)(const AVFrame *frame);
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PRLibrary* mAVCodecLib;
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PRLibrary* mAVUtilLib;
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private:
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};
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} // namespace mozilla
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#endif // FFmpegLibWrapper
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