зеркало из https://github.com/mozilla/gecko-dev.git
149 строки
4.7 KiB
C++
149 строки
4.7 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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#include "FFmpegLibWrapper.h"
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#include "FFmpegLog.h"
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#include "mozilla/PodOperations.h"
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#include "mozilla/Types.h"
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#include "prlink.h"
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#define AV_LOG_DEBUG 48
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namespace mozilla
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{
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FFmpegLibWrapper::FFmpegLibWrapper()
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{
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PodZero(this);
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}
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FFmpegLibWrapper::~FFmpegLibWrapper()
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{
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Unlink();
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}
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bool
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FFmpegLibWrapper::Link()
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{
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if (!mAVCodecLib || !mAVUtilLib) {
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Unlink();
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return false;
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}
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avcodec_version =
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(decltype(avcodec_version))PR_FindSymbol(mAVCodecLib, "avcodec_version");
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if (!avcodec_version) {
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Unlink();
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return false;
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}
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uint32_t version = avcodec_version();
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mVersion = (version >> 16) & 0xff;
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uint32_t micro = version & 0xff;
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if (mVersion == 57 && micro < 100) {
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// a micro version >= 100 indicates that it's FFmpeg (as opposed to LibAV).
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// Due to current AVCodecContext binary incompatibility we can only
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// support FFmpeg 57 at this stage.
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Unlink();
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return false;
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}
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enum {
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AV_FUNC_AVUTIL_MASK = 1 << 8,
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AV_FUNC_53 = 1 << 0,
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AV_FUNC_54 = 1 << 1,
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AV_FUNC_55 = 1 << 2,
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AV_FUNC_56 = 1 << 3,
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AV_FUNC_57 = 1 << 4,
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AV_FUNC_AVUTIL_53 = AV_FUNC_53 | AV_FUNC_AVUTIL_MASK,
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AV_FUNC_AVUTIL_54 = AV_FUNC_54 | AV_FUNC_AVUTIL_MASK,
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AV_FUNC_AVUTIL_55 = AV_FUNC_55 | AV_FUNC_AVUTIL_MASK,
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AV_FUNC_AVUTIL_56 = AV_FUNC_56 | AV_FUNC_AVUTIL_MASK,
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AV_FUNC_AVUTIL_57 = AV_FUNC_57 | AV_FUNC_AVUTIL_MASK,
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AV_FUNC_AVCODEC_ALL = AV_FUNC_53 | AV_FUNC_54 | AV_FUNC_55 | AV_FUNC_56 | AV_FUNC_57,
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AV_FUNC_AVUTIL_ALL = AV_FUNC_AVCODEC_ALL | AV_FUNC_AVUTIL_MASK
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};
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switch (mVersion) {
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case 53:
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version = AV_FUNC_53;
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break;
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case 54:
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version = AV_FUNC_54;
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break;
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case 55:
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version = AV_FUNC_55;
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break;
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case 56:
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version = AV_FUNC_56;
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break;
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case 57:
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version = AV_FUNC_57;
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break;
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default:
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FFMPEG_LOG("Unknown avcodec version");
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Unlink();
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return false;
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}
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#define AV_FUNC(func, ver) \
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if ((ver) & version) { \
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if (!(func = (decltype(func))PR_FindSymbol(((ver) & AV_FUNC_AVUTIL_MASK) ? mAVUtilLib : mAVCodecLib, #func))) { \
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FFMPEG_LOG("Couldn't load function " # func); \
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Unlink(); \
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return false; \
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} \
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} else { \
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func = (decltype(func))nullptr; \
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}
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AV_FUNC(av_lockmgr_register, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_alloc_context3, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_close, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_decode_audio4, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_decode_video2, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_find_decoder, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_flush_buffers, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_open2, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_register_all, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(av_init_packet, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(av_parser_init, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(av_parser_close, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(av_parser_parse2, AV_FUNC_AVCODEC_ALL)
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AV_FUNC(avcodec_get_frame_defaults, (AV_FUNC_53 | AV_FUNC_54))
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AV_FUNC(av_log_set_level, AV_FUNC_AVUTIL_ALL)
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AV_FUNC(av_malloc, AV_FUNC_AVUTIL_ALL)
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AV_FUNC(av_freep, AV_FUNC_AVUTIL_ALL)
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AV_FUNC(avcodec_alloc_frame, AV_FUNC_AVUTIL_54)
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AV_FUNC(avcodec_free_frame, AV_FUNC_AVUTIL_54)
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AV_FUNC(av_frame_alloc, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57))
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AV_FUNC(av_frame_free, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57))
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AV_FUNC(av_frame_unref, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57))
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#undef AV_FUNC
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avcodec_register_all();
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#ifdef DEBUG
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av_log_set_level(AV_LOG_DEBUG);
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#endif
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return true;
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}
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void
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FFmpegLibWrapper::Unlink()
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{
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if (av_lockmgr_register) {
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// Registering a null lockmgr cause the destruction of libav* global mutexes
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// as the default lockmgr that allocated them will be deregistered.
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// This prevents ASAN and valgrind to report sizeof(pthread_mutex_t) leaks.
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av_lockmgr_register(nullptr);
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}
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if (mAVUtilLib && mAVUtilLib != mAVCodecLib) {
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PR_UnloadLibrary(mAVUtilLib);
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}
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if (mAVCodecLib) {
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PR_UnloadLibrary(mAVCodecLib);
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}
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PodZero(this);
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}
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} // namespace mozilla
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