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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef __FFmpegLibWrapper_h__
#define __FFmpegLibWrapper_h__
#include "mozilla/Attributes.h"
#include "mozilla/Types.h"
struct AVCodec;
struct AVCodecContext;
struct AVFrame;
struct AVPacket;
struct AVDictionary;
struct AVCodecParserContext;
struct PRLibrary;
namespace mozilla
{
struct FFmpegLibWrapper
{
FFmpegLibWrapper();
~FFmpegLibWrapper();
enum class LinkResult
{
Success,
NoProvidedLib,
NoAVCodecVersion,
CannotUseLibAV57,
BlockedOldLibAVVersion,
UnknownFutureLibAVVersion,
UnknownFutureFFMpegVersion,
UnknownOlderFFMpegVersion,
MissingFFMpegFunction,
MissingLibAVFunction,
};
// Examine mAVCodecLib and mAVUtilLib, and attempt to resolve all symbols.
// Upon failure, the entire object will be reset and any attached libraries
// will be unlinked.
LinkResult Link();
// Reset the wrapper and unlink all attached libraries.
void Unlink();
// indicate the version of libavcodec linked to.
// 0 indicates that the function wasn't initialized with Link().
int mVersion;
// libavcodec
unsigned (*avcodec_version)();
int (*av_lockmgr_register)(int (*cb)(void** mutex, int op));
AVCodecContext* (*avcodec_alloc_context3)(const AVCodec* codec);
int (*avcodec_close)(AVCodecContext* avctx);
int (*avcodec_decode_audio4)(AVCodecContext* avctx, AVFrame* frame, int* got_frame_ptr, const AVPacket* avpkt);
int (*avcodec_decode_video2)(AVCodecContext* avctx, AVFrame* picture, int* got_picture_ptr, const AVPacket* avpkt);
AVCodec* (*avcodec_find_decoder)(int id);
void (*avcodec_flush_buffers)(AVCodecContext *avctx);
int (*avcodec_open2)(AVCodecContext *avctx, const AVCodec* codec, AVDictionary** options);
void (*avcodec_register_all)();
void (*av_init_packet)(AVPacket* pkt);
AVCodecParserContext* (*av_parser_init)(int codec_id);
void (*av_parser_close)(AVCodecParserContext* s);
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);
// only used in libavcodec <= 54
AVFrame* (*avcodec_alloc_frame)();
void (*avcodec_get_frame_defaults)(AVFrame* pic);
// libavcodec v54 only
void (*avcodec_free_frame)(AVFrame** frame);
// libavcodec v58 and later only
int (*avcodec_send_packet)(AVCodecContext* avctx, const AVPacket* avpkt);
int (*avcodec_receive_frame)(AVCodecContext* avctx, AVFrame* frame);
// libavutil
void (*av_log_set_level)(int level);
void* (*av_malloc)(size_t size);
void (*av_freep)(void *ptr);
// libavutil v55 and later only
AVFrame* (*av_frame_alloc)();
void (*av_frame_free)(AVFrame** frame);
void (*av_frame_unref)(AVFrame* frame);
// libavutil optional
int (*av_frame_get_colorspace)(const AVFrame *frame);
int (*av_frame_get_color_range)(const AVFrame *frame);
PRLibrary* mAVCodecLib;
PRLibrary* mAVUtilLib;
private:
};
} // namespace mozilla
#endif // FFmpegLibWrapper
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