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a1558ff6b2
MozReview-Commit-ID: 9yVNXvIhnUP --HG-- extra : rebase_source : 0ff1ae4fa1ae78e9e06e0c21ec15c235604cb236
174 lines
6.0 KiB
C++
174 lines
6.0 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 "MediaPrefs.h"
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#include "mozilla/PodOperations.h"
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#include "mozilla/Types.h"
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#include "PlatformDecoderModule.h"
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#include "prlink.h"
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#define AV_LOG_DEBUG 48
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#define AV_LOG_INFO 32
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namespace mozilla
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{
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FFmpegLibWrapper::LinkResult
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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 LinkResult::NoProvidedLib;
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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 LinkResult::NoAVCodecVersion;
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}
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uint32_t version = avcodec_version();
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uint32_t macro = (version >> 16) & 0xFFu;
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mVersion = static_cast<int>(macro);
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uint32_t micro = version & 0xFFu;
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// A micro version >= 100 indicates that it's FFmpeg (as opposed to LibAV).
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bool isFFMpeg = micro >= 100;
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if (!isFFMpeg) {
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if (macro == 57) {
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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 LinkResult::CannotUseLibAV57;
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}
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#ifdef MOZ_FFMPEG
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if (version < (54u << 16 | 35u << 8 | 1u) &&
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!MediaPrefs::LibavcodecAllowObsolete()) {
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// Refuse any libavcodec version prior to 54.35.1.
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// (Unless media.libavcodec.allow-obsolete==true)
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Unlink();
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return LinkResult::BlockedOldLibAVVersion;
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}
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#endif
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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 (macro) {
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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 isFFMpeg
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? ((macro > 57)
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? LinkResult::UnknownFutureFFMpegVersion
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: LinkResult::UnknownOlderFFMpegVersion)
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// All LibAV versions<54.35.1 are blocked, therefore we must be
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// dealing with a later one.
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: LinkResult::UnknownFutureLibAVVersion;
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}
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#define AV_FUNC_OPTION(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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} \
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} else { \
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func = (decltype(func))nullptr; \
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}
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#define AV_FUNC(func, ver) \
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AV_FUNC_OPTION(func, ver) \
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if ((ver) & version && !func) { \
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Unlink(); \
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return isFFMpeg ? LinkResult::MissingFFMpegFunction \
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: LinkResult::MissingLibAVFunction; \
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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_alloc_frame, (AV_FUNC_53 | AV_FUNC_54))
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AV_FUNC(avcodec_get_frame_defaults, (AV_FUNC_53 | AV_FUNC_54))
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AV_FUNC(avcodec_free_frame, 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(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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AV_FUNC_OPTION(av_frame_get_colorspace, AV_FUNC_AVUTIL_ALL)
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#undef AV_FUNC
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#undef AV_FUNC_OPTION
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avcodec_register_all();
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if (MOZ_LOG_TEST(sPDMLog, LogLevel::Debug)) {
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av_log_set_level(AV_LOG_DEBUG);
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} else if (MOZ_LOG_TEST(sPDMLog, LogLevel::Info)) {
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av_log_set_level(AV_LOG_INFO);
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} else {
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av_log_set_level(0);
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}
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return LinkResult::Success;
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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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