diff options
Diffstat (limited to 'dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp')
| -rw-r--r-- | dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp new file mode 100644 index 000000000..f3dc00ad7 --- /dev/null +++ b/dom/media/platforms/ffmpeg/FFmpegLibWrapper.cpp @@ -0,0 +1,178 @@ +/* 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/. */ + +#include "FFmpegLibWrapper.h" +#include "FFmpegLog.h" +#include "MediaPrefs.h" +#include "mozilla/PodOperations.h" +#include "mozilla/Types.h" +#include "prlink.h" + +#define AV_LOG_DEBUG 48 + +namespace mozilla +{ + +FFmpegLibWrapper::FFmpegLibWrapper() +{ + PodZero(this); +} + +FFmpegLibWrapper::~FFmpegLibWrapper() +{ + Unlink(); +} + +FFmpegLibWrapper::LinkResult +FFmpegLibWrapper::Link() +{ + if (!mAVCodecLib || !mAVUtilLib) { + Unlink(); + return LinkResult::NoProvidedLib; + } + + avcodec_version = + (decltype(avcodec_version))PR_FindSymbol(mAVCodecLib, "avcodec_version"); + if (!avcodec_version) { + Unlink(); + return LinkResult::NoAVCodecVersion; + } + uint32_t version = avcodec_version(); + uint32_t macro = (version >> 16) & 0xFFu; + mVersion = static_cast<int>(macro); + uint32_t micro = version & 0xFFu; + // A micro version >= 100 indicates that it's FFmpeg (as opposed to LibAV). + bool isFFMpeg = micro >= 100; + if (!isFFMpeg) { + if (macro == 57) { + // Due to current AVCodecContext binary incompatibility we can only + // support FFmpeg 57 at this stage. + Unlink(); + return LinkResult::CannotUseLibAV57; + } +#ifdef MOZ_FFMPEG + if (version < (54u << 16 | 35u << 8 | 1u) + && !MediaPrefs::LibavcodecAllowObsolete()) { + // Refuse any libavcodec version prior to 54.35.1. + // (Unless media.libavcodec.allow-obsolete==true) + Unlink(); + return LinkResult::BlockedOldLibAVVersion; + } +#endif + } + + enum { + AV_FUNC_AVUTIL_MASK = 1 << 8, + AV_FUNC_53 = 1 << 0, + AV_FUNC_54 = 1 << 1, + AV_FUNC_55 = 1 << 2, + AV_FUNC_56 = 1 << 3, + AV_FUNC_57 = 1 << 4, + AV_FUNC_AVUTIL_53 = AV_FUNC_53 | AV_FUNC_AVUTIL_MASK, + AV_FUNC_AVUTIL_54 = AV_FUNC_54 | AV_FUNC_AVUTIL_MASK, + AV_FUNC_AVUTIL_55 = AV_FUNC_55 | AV_FUNC_AVUTIL_MASK, + AV_FUNC_AVUTIL_56 = AV_FUNC_56 | AV_FUNC_AVUTIL_MASK, + AV_FUNC_AVUTIL_57 = AV_FUNC_57 | AV_FUNC_AVUTIL_MASK, + AV_FUNC_AVCODEC_ALL = AV_FUNC_53 | AV_FUNC_54 | AV_FUNC_55 | AV_FUNC_56 | AV_FUNC_57, + AV_FUNC_AVUTIL_ALL = AV_FUNC_AVCODEC_ALL | AV_FUNC_AVUTIL_MASK + }; + + switch (macro) { + case 53: + version = AV_FUNC_53; + break; + case 54: + version = AV_FUNC_54; + break; + case 55: + version = AV_FUNC_55; + break; + case 56: + version = AV_FUNC_56; + break; + case 57: + version = AV_FUNC_57; + break; + default: + FFMPEG_LOG("Unknown avcodec version"); + Unlink(); + return isFFMpeg + ? ((macro > 57) + ? LinkResult::UnknownFutureFFMpegVersion + : LinkResult::UnknownOlderFFMpegVersion) + // All LibAV versions<54.35.1 are blocked, therefore we must be + // dealing with a later one. + : LinkResult::UnknownFutureLibAVVersion; + } + +#define AV_FUNC_OPTION(func, ver) \ + if ((ver) & version) { \ + if (!(func = (decltype(func))PR_FindSymbol(((ver) & AV_FUNC_AVUTIL_MASK) ? mAVUtilLib : mAVCodecLib, #func))) { \ + FFMPEG_LOG("Couldn't load function " # func); \ + } \ + } else { \ + func = (decltype(func))nullptr; \ + } + +#define AV_FUNC(func, ver) \ + AV_FUNC_OPTION(func, ver) \ + if ((ver) & version && !func) { \ + Unlink(); \ + return isFFMpeg ? LinkResult::MissingFFMpegFunction \ + : LinkResult::MissingLibAVFunction; \ + } + + AV_FUNC(av_lockmgr_register, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_alloc_context3, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_close, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_decode_audio4, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_decode_video2, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_find_decoder, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_flush_buffers, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_open2, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_register_all, AV_FUNC_AVCODEC_ALL) + AV_FUNC(av_init_packet, AV_FUNC_AVCODEC_ALL) + AV_FUNC(av_parser_init, AV_FUNC_AVCODEC_ALL) + AV_FUNC(av_parser_close, AV_FUNC_AVCODEC_ALL) + AV_FUNC(av_parser_parse2, AV_FUNC_AVCODEC_ALL) + AV_FUNC(avcodec_alloc_frame, (AV_FUNC_53 | AV_FUNC_54)) + AV_FUNC(avcodec_get_frame_defaults, (AV_FUNC_53 | AV_FUNC_54)) + AV_FUNC(avcodec_free_frame, AV_FUNC_54) + AV_FUNC(av_log_set_level, AV_FUNC_AVUTIL_ALL) + AV_FUNC(av_malloc, AV_FUNC_AVUTIL_ALL) + AV_FUNC(av_freep, AV_FUNC_AVUTIL_ALL) + AV_FUNC(av_frame_alloc, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57)) + AV_FUNC(av_frame_free, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57)) + AV_FUNC(av_frame_unref, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 | AV_FUNC_AVUTIL_57)) + AV_FUNC_OPTION(av_frame_get_colorspace, AV_FUNC_AVUTIL_ALL) +#undef AV_FUNC +#undef AV_FUNC_OPTION + + avcodec_register_all(); +#ifdef DEBUG + av_log_set_level(AV_LOG_DEBUG); +#endif + + return LinkResult::Success; +} + +void +FFmpegLibWrapper::Unlink() +{ + if (av_lockmgr_register) { + // Registering a null lockmgr cause the destruction of libav* global mutexes + // as the default lockmgr that allocated them will be deregistered. + // This prevents ASAN and valgrind to report sizeof(pthread_mutex_t) leaks. + av_lockmgr_register(nullptr); + } + if (mAVUtilLib && mAVUtilLib != mAVCodecLib) { + PR_UnloadLibrary(mAVUtilLib); + } + if (mAVCodecLib) { + PR_UnloadLibrary(mAVCodecLib); + } + PodZero(this); +} + +} // namespace mozilla
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