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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/. */
#include "FFmpegLibWrapper.h"
#include "FFmpegLog.h"
#include "mozilla/PodOperations.h"
#ifdef MOZ_FFMPEG
# include "mozilla/StaticPrefs_media.h"
#endif
#include "mozilla/Types.h"
#include "PlatformDecoderModule.h"
#include "prlink.h"
#ifdef MOZ_WAYLAND
# include "mozilla/widget/DMABufLibWrapper.h"
# include "mozilla/StaticPrefs_media.h"
#endif
#define AV_LOG_DEBUG 48
#define AV_LOG_INFO 32
namespace mozilla {
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) &&
!StaticPrefs::media_libavcodec_allow_obsolete()) {
// 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_58 = 1 << 5,
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_AVUTIL_58 = AV_FUNC_58 | 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_58,
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;
case 58:
version = AV_FUNC_58;
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_SILENT(func, ver) \
if ((ver)&version) { \
if (!(func = (decltype(func))PR_FindSymbol( \
((ver)&AV_FUNC_AVUTIL_MASK) ? mAVUtilLib : mAVCodecLib, \
#func))) { \
} \
} else { \
func = (decltype(func)) nullptr; \
}
#define AV_FUNC_OPTION(func, ver) \
AV_FUNC_OPTION_SILENT(func, ver) \
if ((ver)&version && (func) == (decltype(func)) nullptr) { \
FFMPEG_LOG("Couldn't load function " #func); \
}
#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(avcodec_send_packet, AV_FUNC_58)
AV_FUNC(avcodec_receive_frame, AV_FUNC_58)
AV_FUNC_OPTION(av_rdft_init, AV_FUNC_AVCODEC_ALL)
AV_FUNC_OPTION(av_rdft_calc, AV_FUNC_AVCODEC_ALL)
AV_FUNC_OPTION(av_rdft_end, AV_FUNC_AVCODEC_ALL)
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_AVUTIL_58))
AV_FUNC(av_frame_free, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 |
AV_FUNC_AVUTIL_57 | AV_FUNC_AVUTIL_58))
AV_FUNC(av_frame_unref, (AV_FUNC_AVUTIL_55 | AV_FUNC_AVUTIL_56 |
AV_FUNC_AVUTIL_57 | AV_FUNC_AVUTIL_58))
AV_FUNC_OPTION(av_frame_get_colorspace, AV_FUNC_AVUTIL_ALL)
AV_FUNC_OPTION(av_frame_get_color_range, AV_FUNC_AVUTIL_ALL)
#ifdef MOZ_WAYLAND
AV_FUNC_OPTION_SILENT(avcodec_get_hw_config, AV_FUNC_58)
AV_FUNC_OPTION_SILENT(av_hwdevice_ctx_init, AV_FUNC_58)
AV_FUNC_OPTION_SILENT(av_hwdevice_ctx_alloc, AV_FUNC_58)
AV_FUNC_OPTION_SILENT(av_buffer_ref, AV_FUNC_AVUTIL_58)
AV_FUNC_OPTION_SILENT(av_buffer_unref, AV_FUNC_AVUTIL_58)
AV_FUNC_OPTION_SILENT(av_hwframe_transfer_get_formats, AV_FUNC_58)
AV_FUNC_OPTION_SILENT(av_hwdevice_ctx_create_derived, AV_FUNC_58)
AV_FUNC_OPTION_SILENT(av_hwframe_ctx_alloc, AV_FUNC_58)
AV_FUNC_OPTION_SILENT(av_dict_set, AV_FUNC_58)
AV_FUNC_OPTION_SILENT(av_dict_free, AV_FUNC_58)
#endif
#undef AV_FUNC
#undef AV_FUNC_OPTION
#ifdef MOZ_WAYLAND
# define VA_FUNC_OPTION_SILENT(func) \
if (!(func = (decltype(func))PR_FindSymbol(mVALib, #func))) { \
func = (decltype(func)) nullptr; \
}
// mVALib is optional and may not be present.
if (mVALib) {
VA_FUNC_OPTION_SILENT(vaExportSurfaceHandle)
VA_FUNC_OPTION_SILENT(vaSyncSurface)
VA_FUNC_OPTION_SILENT(vaInitialize)
VA_FUNC_OPTION_SILENT(vaTerminate)
}
# undef VA_FUNC_OPTION_SILENT
# define VAW_FUNC_OPTION_SILENT(func) \
if (!(func = (decltype(func))PR_FindSymbol(mVALibWayland, #func))) { \
FFMPEG_LOG("Couldn't load function " #func); \
}
// mVALibWayland is optional and may not be present.
if (mVALibWayland) {
VAW_FUNC_OPTION_SILENT(vaGetDisplayWl)
}
# undef VAW_FUNC_OPTION_SILENT
# define VAD_FUNC_OPTION_SILENT(func) \
if (!(func = (decltype(func))PR_FindSymbol(mVALibDrm, #func))) { \
FFMPEG_LOG("Couldn't load function " #func); \
}
// mVALibDrm is optional and may not be present.
if (mVALibDrm) {
VAD_FUNC_OPTION_SILENT(vaGetDisplayDRM)
}
# undef VAD_FUNC_OPTION_SILENT
#endif
avcodec_register_all();
if (MOZ_LOG_TEST(sPDMLog, LogLevel::Debug)) {
av_log_set_level(AV_LOG_DEBUG);
} else if (MOZ_LOG_TEST(sPDMLog, LogLevel::Info)) {
av_log_set_level(AV_LOG_INFO);
} else {
av_log_set_level(0);
}
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);
}
#ifndef MOZ_TSAN
// With TSan, we cannot unload libav once we have loaded it because
// TSan does not support unloading libraries that are matched from its
// suppression list. Hence we just keep the library loaded in TSan builds.
if (mAVUtilLib && mAVUtilLib != mAVCodecLib) {
PR_UnloadLibrary(mAVUtilLib);
}
if (mAVCodecLib) {
PR_UnloadLibrary(mAVCodecLib);
}
#endif
#ifdef MOZ_WAYLAND
if (mVALib) {
PR_UnloadLibrary(mVALib);
}
if (mVALibWayland) {
PR_UnloadLibrary(mVALibWayland);
}
if (mVALibDrm) {
PR_UnloadLibrary(mVALibDrm);
}
#endif
PodZero(this);
}
#ifdef MOZ_WAYLAND
void FFmpegLibWrapper::LinkVAAPILibs() {
if (widget::GetDMABufDevice()->IsDMABufVAAPIEnabled()) {
PRLibSpec lspec;
lspec.type = PR_LibSpec_Pathname;
const char* libDrm = "libva-drm.so.2";
lspec.value.pathname = libDrm;
mVALibDrm = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
if (!mVALibDrm) {
FFMPEG_LOG("VA-API support: Missing or old %s library.\n", libDrm);
}
if (!StaticPrefs::media_ffmpeg_vaapi_drm_display_enabled()) {
const char* libWayland = "libva-wayland.so.2";
lspec.value.pathname = libWayland;
mVALibWayland = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
if (!mVALibWayland) {
FFMPEG_LOG("VA-API support: Missing or old %s library.\n", libWayland);
}
}
if (mVALibWayland || mVALibDrm) {
const char* lib = "libva.so.2";
lspec.value.pathname = lib;
mVALib = PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
// Don't use libva when it's missing vaExportSurfaceHandle.
if (mVALib && !PR_FindSymbol(mVALib, "vaExportSurfaceHandle")) {
PR_UnloadLibrary(mVALib);
mVALib = nullptr;
}
if (!mVALib) {
FFMPEG_LOG("VA-API support: Missing or old %s library.\n", lib);
}
}
} else {
FFMPEG_LOG("VA-API FFmpeg is disabled by platform");
}
}
#endif
#ifdef MOZ_WAYLAND
bool FFmpegLibWrapper::IsVAAPIAvailable() {
# define VA_FUNC_LOADED(func) (func != nullptr)
return VA_FUNC_LOADED(avcodec_get_hw_config) &&
VA_FUNC_LOADED(av_hwdevice_ctx_alloc) &&
VA_FUNC_LOADED(av_hwdevice_ctx_init) &&
VA_FUNC_LOADED(av_buffer_ref) && VA_FUNC_LOADED(av_buffer_unref) &&
VA_FUNC_LOADED(av_hwframe_transfer_get_formats) &&
VA_FUNC_LOADED(av_hwdevice_ctx_create_derived) &&
VA_FUNC_LOADED(av_hwframe_ctx_alloc) && VA_FUNC_LOADED(av_dict_set) &&
VA_FUNC_LOADED(av_dict_free) &&
VA_FUNC_LOADED(vaExportSurfaceHandle) &&
VA_FUNC_LOADED(vaSyncSurface) && VA_FUNC_LOADED(vaInitialize) &&
VA_FUNC_LOADED(vaTerminate) &&
(VA_FUNC_LOADED(vaGetDisplayWl) || VA_FUNC_LOADED(vaGetDisplayDRM));
}
#endif
} // namespace mozilla