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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
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "FFmpegRuntimeLinker.h"
#include "FFmpegLibWrapper.h"
#include "mozilla/ArrayUtils.h"
#include "FFmpegLog.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*);
};
static FFmpegLibWrapper sLibAV;
static const char* sLibs[] = {
#if defined(XP_DARWIN)
"libavcodec.58.dylib",
"libavcodec.57.dylib",
"libavcodec.56.dylib",
"libavcodec.55.dylib",
"libavcodec.54.dylib",
"libavcodec.53.dylib",
#else
"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
};
/* static */ bool
FFmpegRuntimeLinker::Init()
{
if (sLinkStatus != LinkStatus_INIT) {
return sLinkStatus == LinkStatus_SUCCEEDED;
}
// 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 < ArrayLength(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;
switch (sLibAV.Link()) {
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;
}
}
}
FFMPEG_LOG("H264/AAC codecs unsupported without [");
for (size_t i = 0; i < ArrayLength(sLibs); i++) {
FFMPEG_LOG("%s %s", i ? "," : " ", sLibs[i]);
}
FFMPEG_LOG(" ]\n");
return false;
}
/* static */ already_AddRefed<PlatformDecoderModule>
FFmpegRuntimeLinker::CreateDecoderModule()
{
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;
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
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