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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sw=2 sts=2 et cindent: */
/* 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
#include "FFmpegLibWrapper.h"
#include "FFmpegLog.h"
#include "FFmpegRuntimeLinker.h"
#include "mozilla/ArrayUtils.h"
#include "prlink.h"
namespace mozilla {
FFmpegRuntimeLinker::LinkStatus FFmpegRuntimeLinker::sLinkStatus =
LinkStatus_INIT;
const char* FFmpegRuntimeLinker::sLinkStatusLibraryName = "";
template <int V>
class FFmpegDecoderModule {
public:
static already_AddRefed<PlatformDecoderModule> Create(FFmpegLibWrapper*);
};
template <int V>
class FFmpegEncoderModule {
public:
static already_AddRefed<PlatformEncoderModule> Create(FFmpegLibWrapper*);
};
static FFmpegLibWrapper sLibAV;
static const char* sLibs[] = {
// clang-format off
#if defined(XP_DARWIN)
"libavcodec.61.dylib",
"libavcodec.60.dylib",
"libavcodec.59.dylib",
"libavcodec.58.dylib",
"libavcodec.57.dylib",
"libavcodec.56.dylib",
"libavcodec.55.dylib",
"libavcodec.54.dylib",
"libavcodec.53.dylib",
#elif defined(XP_OPENBSD)
"libavcodec.so", // OpenBSD hardly controls the major/minor library version
// of ffmpeg and update it regulary on ABI/API changes
#else
"libavcodec.so.61",
"libavcodec.so.60",
"libavcodec.so.59",
"libavcodec.so.58",
"libavcodec-ffmpeg.so.58",
"libavcodec-ffmpeg.so.57",
"libavcodec-ffmpeg.so.56",
"libavcodec.so.57",
"libavcodec.so.56",
"libavcodec.so.55",
"libavcodec.so.54",
"libavcodec.so.53",
#endif
// clang-format on
};
/* static */
bool FFmpegRuntimeLinker::Init() {
if (sLinkStatus != LinkStatus_INIT) {
return sLinkStatus == LinkStatus_SUCCEEDED;
}
#ifdef MOZ_WIDGET_GTK
sLibAV.LinkVAAPILibs();
#endif
// While going through all possible libs, this status will be updated with a
// more precise error if possible.
sLinkStatus = LinkStatus_NOT_FOUND;
for (size_t i = 0; i < std::size(sLibs); i++) {
const char* lib = sLibs[i];
PRLibSpec lspec;
lspec.type = PR_LibSpec_Pathname;
lspec.value.pathname = lib;
sLibAV.mAVCodecLib =
PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
if (sLibAV.mAVCodecLib) {
sLibAV.mAVUtilLib = sLibAV.mAVCodecLib;
FFmpegLibWrapper::LinkResult res = sLibAV.Link();
switch (res) {
case FFmpegLibWrapper::LinkResult::Success:
sLinkStatus = LinkStatus_SUCCEEDED;
sLinkStatusLibraryName = lib;
return true;
case FFmpegLibWrapper::LinkResult::NoProvidedLib:
MOZ_ASSERT_UNREACHABLE("Incorrectly-setup sLibAV");
break;
case FFmpegLibWrapper::LinkResult::NoAVCodecVersion:
if (sLinkStatus > LinkStatus_INVALID_CANDIDATE) {
sLinkStatus = LinkStatus_INVALID_CANDIDATE;
sLinkStatusLibraryName = lib;
}
break;
case FFmpegLibWrapper::LinkResult::CannotUseLibAV57:
if (sLinkStatus > LinkStatus_UNUSABLE_LIBAV57) {
sLinkStatus = LinkStatus_UNUSABLE_LIBAV57;
sLinkStatusLibraryName = lib;
}
break;
case FFmpegLibWrapper::LinkResult::BlockedOldLibAVVersion:
if (sLinkStatus > LinkStatus_OBSOLETE_LIBAV) {
sLinkStatus = LinkStatus_OBSOLETE_LIBAV;
sLinkStatusLibraryName = lib;
}
break;
case FFmpegLibWrapper::LinkResult::UnknownFutureLibAVVersion:
case FFmpegLibWrapper::LinkResult::MissingLibAVFunction:
if (sLinkStatus > LinkStatus_INVALID_LIBAV_CANDIDATE) {
sLinkStatus = LinkStatus_INVALID_LIBAV_CANDIDATE;
sLinkStatusLibraryName = lib;
}
break;
case FFmpegLibWrapper::LinkResult::UnknownFutureFFMpegVersion:
case FFmpegLibWrapper::LinkResult::MissingFFMpegFunction:
if (sLinkStatus > LinkStatus_INVALID_FFMPEG_CANDIDATE) {
sLinkStatus = LinkStatus_INVALID_FFMPEG_CANDIDATE;
sLinkStatusLibraryName = lib;
}
break;
case FFmpegLibWrapper::LinkResult::UnknownOlderFFMpegVersion:
if (sLinkStatus > LinkStatus_OBSOLETE_FFMPEG) {
sLinkStatus = LinkStatus_OBSOLETE_FFMPEG;
sLinkStatusLibraryName = lib;
}
break;
}
FFMPEGP_LOG("Failed to link %s: %s", lib,
FFmpegLibWrapper::EnumValueToString(res));
}
}
FFMPEGV_LOG("H264/AAC codecs unsupported without [");
for (size_t i = 0; i < std::size(sLibs); i++) {
FFMPEGV_LOG("%s %s", i ? "," : " ", sLibs[i]);
}
FFMPEGV_LOG(" ]\n");
return false;
}
/* static */
already_AddRefed<PlatformDecoderModule> FFmpegRuntimeLinker::CreateDecoder() {
if (!Init()) {
return nullptr;
}
RefPtr<PlatformDecoderModule> module;
switch (sLibAV.mVersion) {
case 53:
module = FFmpegDecoderModule<53>::Create(&sLibAV);
break;
case 54:
module = FFmpegDecoderModule<54>::Create(&sLibAV);
break;
case 55:
case 56:
module = FFmpegDecoderModule<55>::Create(&sLibAV);
break;
case 57:
module = FFmpegDecoderModule<57>::Create(&sLibAV);
break;
case 58:
module = FFmpegDecoderModule<58>::Create(&sLibAV);
break;
case 59:
module = FFmpegDecoderModule<59>::Create(&sLibAV);
break;
case 60:
module = FFmpegDecoderModule<60>::Create(&sLibAV);
break;
case 61:
module = FFmpegDecoderModule<61>::Create(&sLibAV);
break;
default:
module = nullptr;
}
return module.forget();
}
/* static */
already_AddRefed<PlatformEncoderModule> FFmpegRuntimeLinker::CreateEncoder() {
if (!Init()) {
return nullptr;
}
RefPtr<PlatformEncoderModule> module;
switch (sLibAV.mVersion) {
case 53:
module = FFmpegEncoderModule<53>::Create(&sLibAV);
break;
case 54:
module = FFmpegEncoderModule<54>::Create(&sLibAV);
break;
case 55:
case 56:
module = FFmpegEncoderModule<55>::Create(&sLibAV);
break;
case 57:
module = FFmpegEncoderModule<57>::Create(&sLibAV);
break;
case 58:
module = FFmpegEncoderModule<58>::Create(&sLibAV);
break;
case 59:
module = FFmpegEncoderModule<59>::Create(&sLibAV);
break;
case 60:
module = FFmpegEncoderModule<60>::Create(&sLibAV);
break;
case 61:
module = FFmpegEncoderModule<61>::Create(&sLibAV);
break;
default:
module = nullptr;
}
return module.forget();
}
/* static */ const char* FFmpegRuntimeLinker::LinkStatusString() {
switch (sLinkStatus) {
case LinkStatus_INIT:
return "Libavcodec not initialized yet";
case LinkStatus_SUCCEEDED:
return "Libavcodec linking succeeded";
case LinkStatus_INVALID_FFMPEG_CANDIDATE:
return "Invalid FFMpeg libavcodec candidate";
case LinkStatus_UNUSABLE_LIBAV57:
return "Unusable LibAV's libavcodec 57";
case LinkStatus_INVALID_LIBAV_CANDIDATE:
return "Invalid LibAV libavcodec candidate";
case LinkStatus_OBSOLETE_FFMPEG:
return "Obsolete FFMpeg libavcodec candidate";
case LinkStatus_OBSOLETE_LIBAV:
return "Obsolete LibAV libavcodec candidate";
case LinkStatus_INVALID_CANDIDATE:
return "Invalid libavcodec candidate";
case LinkStatus_NOT_FOUND:
return "Libavcodec not found";
}
MOZ_ASSERT_UNREACHABLE("Unknown sLinkStatus value");
return "?";
}
} // namespace mozilla