FFmpegLibWrapper.h

mozilla-central/dom/media/platforms/ffmpeg/FFmpegLibWrapper.h (file symbol)

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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/DefineEnum.h"

#include "mozilla/Types.h"

#include "ffvpx/tx.h"

struct AVCodec;

struct AVCodecContext;

struct AVCodecDescriptor;

struct AVFrame;

struct AVPacket;

struct AVDictionary;

struct AVCodecParserContext;

struct PRLibrary;

struct AVChannelLayout;

#ifdef MOZ_WIDGET_GTK

struct AVCodecHWConfig;

struct AVVAAPIHWConfig;

struct AVHWFramesConstraints;

#endif

struct AVBufferRef;

namespace mozilla {

struct MOZ_ONLY_USED_TO_AVOID_STATIC_CONSTRUCTORS FFmpegLibWrapper {

  // The class is used only in static storage and so is zero initialized.

  FFmpegLibWrapper() = default;

  // The libraries are not unloaded in the destructor, because doing so would

  // require a static constructor to register the static destructor.  As the

  // class is in static storage, the destructor would only run on shutdown

  // anyway.

  ~FFmpegLibWrapper() = default;

  MOZ_DEFINE_ENUM_CLASS_WITH_TOSTRING_AT_CLASS_SCOPE(

      LinkResult, (Success, NoProvidedLib, NoAVCodecVersion, CannotUseLibAV57,

                   BlockedOldLibAVVersion, UnknownFutureLibAVVersion,

                   UnknownFutureFFMpegVersion, UnknownOlderFFMpegVersion,

                   MissingFFMpegFunction, MissingLibAVFunction));

  // Examine mAVCodecLib, mAVUtilLib and mVALib, 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();

#ifdef MOZ_WIDGET_GTK

  // Check if mVALib are available and we can use HW decode.

  bool IsVAAPIAvailable();

  void LinkVAAPILibs();

#endif

  // 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);

  AVCodec* (*avcodec_find_decoder_by_name)(const char* name);

  AVCodec* (*avcodec_find_encoder)(int id);

  AVCodec* (*avcodec_find_encoder_by_name)(const char* name);

  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);

  AVCodec* (*av_codec_iterate)(void** opaque);

  int (*av_codec_is_decoder)(const AVCodec* codec);

  void (*avcodec_align_dimensions)(AVCodecContext* s, int* width, int* height);

  int (*av_strerror)(int errnum, char* errbuf, size_t errbuf_size);

  AVCodecDescriptor* (*avcodec_descriptor_get)(int id);

  // 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 >= v55

  int (*avcodec_default_get_buffer2)(AVCodecContext* s, AVFrame* frame,

                                     int flags);

  // libavcodec >= v57

  void (*av_packet_unref)(AVPacket* pkt);

  void (*av_packet_free)(AVPacket** pkt);

  // libavcodec >= 61

  AVPacket* (*av_packet_alloc)();

  // libavcodec v58 and later only

  int (*avcodec_send_packet)(AVCodecContext* avctx, const AVPacket* avpkt);

  int (*avcodec_receive_packet)(AVCodecContext* avctx, AVPacket* avpkt);

  int (*avcodec_send_frame)(AVCodecContext* avctx, const AVFrame* frame);

  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);

  int (*av_image_check_size)(unsigned int w, unsigned int h, int log_offset,

                             void* log_ctx);

  int (*av_image_get_buffer_size)(int pix_fmt, int width, int height,

                                  int align);

  const char* (*av_get_sample_fmt_name)(int sample_fmt);

  void (*av_channel_layout_default)(AVChannelLayout* ch_layout,

                                    int nb_channels);

  void (*av_channel_layout_from_mask)(AVChannelLayout* ch_layout,

                                      uint64_t mask);

  int (*av_channel_layout_copy)(AVChannelLayout* dst, AVChannelLayout* src);

  int (*av_dict_set)(AVDictionary** pm, const char* key, const char* value,

                     int flags);

  void (*av_dict_free)(AVDictionary** m);

  int (*av_opt_set)(void* obj, const char* name, const char* val,

                    int search_flags);

  int (*av_opt_set_double)(void* obj, const char* name, double val,

                           int search_flags);

  int (*av_opt_set_int)(void* obj, const char* name, int64_t val,

                        int search_flags);

  // libavutil v55 and later only

  AVFrame* (*av_frame_alloc)();

  void (*av_frame_free)(AVFrame** frame);

  void (*av_frame_unref)(AVFrame* frame);

  int (*av_frame_get_buffer)(AVFrame* frame, int align);

  int (*av_frame_make_writable)(AVFrame* frame);

  AVBufferRef* (*av_buffer_create)(uint8_t* data, int size,

                                   void (*free)(void* opaque, uint8_t* data),

                                   void* opaque, int flags);

  // libavutil >= v56

  void* (*av_buffer_get_opaque)(const AVBufferRef* buf);

  // libavutil optional

  int (*av_frame_get_colorspace)(const AVFrame* frame);

  int (*av_frame_get_color_range)(const AVFrame* frame);

#ifdef MOZ_WIDGET_GTK

  const AVCodecHWConfig* (*avcodec_get_hw_config)(const AVCodec* codec,

                                                  int index);

  AVBufferRef* (*av_hwdevice_ctx_alloc)(int);

  int (*av_hwdevice_ctx_init)(AVBufferRef* ref);

  AVVAAPIHWConfig* (*av_hwdevice_hwconfig_alloc)(AVBufferRef* device_ctx);

  AVHWFramesConstraints* (*av_hwdevice_get_hwframe_constraints)(

      AVBufferRef* ref, const void* hwconfig);

  void (*av_hwframe_constraints_free)(AVHWFramesConstraints** constraints);

  AVBufferRef* (*av_buffer_ref)(AVBufferRef* buf);

  void (*av_buffer_unref)(AVBufferRef** buf);

  int (*av_hwframe_transfer_get_formats)(AVBufferRef* hwframe_ctx, int dir,

                                         int** formats, int flags);

  int (*av_hwdevice_ctx_create_derived)(AVBufferRef** dst_ctx, int type,

                                        AVBufferRef* src_ctx, int flags);

  AVBufferRef* (*av_hwframe_ctx_alloc)(AVBufferRef* device_ctx);

  const char* (*avcodec_get_name)(int id);

  char* (*av_get_pix_fmt_string)(char* buf, int buf_size, int pix_fmt);

  int (*vaExportSurfaceHandle)(void*, unsigned int, uint32_t, uint32_t, void*);

  int (*vaSyncSurface)(void*, unsigned int);

  int (*vaInitialize)(void* dpy, int* major_version, int* minor_version);

  int (*vaTerminate)(void* dpy);

  void* (*vaGetDisplayDRM)(int fd);

#endif

  // Only ever used with ffvpx

  decltype(::av_tx_init)* av_tx_init;

  decltype(::av_tx_uninit)* av_tx_uninit;

  PRLibrary* mAVCodecLib;

  PRLibrary* mAVUtilLib;

#ifdef MOZ_WIDGET_GTK

  PRLibrary* mVALib;

  PRLibrary* mVALibDrm;

#endif

};

}  // namespace mozilla

#endif  // FFmpegLibWrapper