зеркало из https://github.com/mozilla/gecko-dev.git
176 строки
5.6 KiB
C++
176 строки
5.6 KiB
C++
/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim:set ts=2 sw=2 sts=2 et cindent: */
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/* 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 "FFmpegRuntimeLinker.h"
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#include "FFmpegLibWrapper.h"
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#include "mozilla/ArrayUtils.h"
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#include "FFmpegLog.h"
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#include "prlink.h"
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namespace mozilla {
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FFmpegRuntimeLinker::LinkStatus FFmpegRuntimeLinker::sLinkStatus =
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LinkStatus_INIT;
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const char* FFmpegRuntimeLinker::sLinkStatusLibraryName = "";
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template <int V> class FFmpegDecoderModule
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{
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public:
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static already_AddRefed<PlatformDecoderModule> Create(FFmpegLibWrapper*);
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};
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static FFmpegLibWrapper sLibAV;
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static const char* sLibs[] = {
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// clang-format off
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#if defined(XP_DARWIN)
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"libavcodec.58.dylib",
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"libavcodec.57.dylib",
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"libavcodec.56.dylib",
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"libavcodec.55.dylib",
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"libavcodec.54.dylib",
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"libavcodec.53.dylib",
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#else
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"libavcodec.so.58",
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"libavcodec-ffmpeg.so.58",
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"libavcodec-ffmpeg.so.57",
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"libavcodec-ffmpeg.so.56",
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"libavcodec.so.57",
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"libavcodec.so.56",
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"libavcodec.so.55",
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"libavcodec.so.54",
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"libavcodec.so.53",
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#endif
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// clang-format on
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};
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/* static */ bool
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FFmpegRuntimeLinker::Init()
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{
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if (sLinkStatus != LinkStatus_INIT) {
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return sLinkStatus == LinkStatus_SUCCEEDED;
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}
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// While going through all possible libs, this status will be updated with a
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// more precise error if possible.
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sLinkStatus = LinkStatus_NOT_FOUND;
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for (size_t i = 0; i < ArrayLength(sLibs); i++) {
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const char* lib = sLibs[i];
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PRLibSpec lspec;
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lspec.type = PR_LibSpec_Pathname;
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lspec.value.pathname = lib;
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sLibAV.mAVCodecLib =
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PR_LoadLibraryWithFlags(lspec, PR_LD_NOW | PR_LD_LOCAL);
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if (sLibAV.mAVCodecLib) {
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sLibAV.mAVUtilLib = sLibAV.mAVCodecLib;
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switch (sLibAV.Link()) {
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case FFmpegLibWrapper::LinkResult::Success:
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sLinkStatus = LinkStatus_SUCCEEDED;
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sLinkStatusLibraryName = lib;
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return true;
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case FFmpegLibWrapper::LinkResult::NoProvidedLib:
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MOZ_ASSERT_UNREACHABLE("Incorrectly-setup sLibAV");
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break;
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case FFmpegLibWrapper::LinkResult::NoAVCodecVersion:
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if (sLinkStatus > LinkStatus_INVALID_CANDIDATE) {
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sLinkStatus = LinkStatus_INVALID_CANDIDATE;
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sLinkStatusLibraryName = lib;
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}
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break;
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case FFmpegLibWrapper::LinkResult::CannotUseLibAV57:
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if (sLinkStatus > LinkStatus_UNUSABLE_LIBAV57) {
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sLinkStatus = LinkStatus_UNUSABLE_LIBAV57;
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sLinkStatusLibraryName = lib;
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}
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break;
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case FFmpegLibWrapper::LinkResult::BlockedOldLibAVVersion:
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if (sLinkStatus > LinkStatus_OBSOLETE_LIBAV) {
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sLinkStatus = LinkStatus_OBSOLETE_LIBAV;
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sLinkStatusLibraryName = lib;
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}
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break;
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case FFmpegLibWrapper::LinkResult::UnknownFutureLibAVVersion:
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case FFmpegLibWrapper::LinkResult::MissingLibAVFunction:
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if (sLinkStatus > LinkStatus_INVALID_LIBAV_CANDIDATE) {
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sLinkStatus = LinkStatus_INVALID_LIBAV_CANDIDATE;
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sLinkStatusLibraryName = lib;
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}
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break;
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case FFmpegLibWrapper::LinkResult::UnknownFutureFFMpegVersion:
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case FFmpegLibWrapper::LinkResult::MissingFFMpegFunction:
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if (sLinkStatus > LinkStatus_INVALID_FFMPEG_CANDIDATE) {
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sLinkStatus = LinkStatus_INVALID_FFMPEG_CANDIDATE;
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sLinkStatusLibraryName = lib;
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}
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break;
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case FFmpegLibWrapper::LinkResult::UnknownOlderFFMpegVersion:
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if (sLinkStatus > LinkStatus_OBSOLETE_FFMPEG) {
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sLinkStatus = LinkStatus_OBSOLETE_FFMPEG;
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sLinkStatusLibraryName = lib;
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}
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break;
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}
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}
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}
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FFMPEG_LOG("H264/AAC codecs unsupported without [");
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for (size_t i = 0; i < ArrayLength(sLibs); i++) {
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FFMPEG_LOG("%s %s", i ? "," : " ", sLibs[i]);
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}
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FFMPEG_LOG(" ]\n");
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return false;
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}
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/* static */ already_AddRefed<PlatformDecoderModule>
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FFmpegRuntimeLinker::CreateDecoderModule()
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{
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if (!Init()) {
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return nullptr;
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}
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RefPtr<PlatformDecoderModule> module;
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switch (sLibAV.mVersion) {
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case 53: module = FFmpegDecoderModule<53>::Create(&sLibAV); break;
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case 54: module = FFmpegDecoderModule<54>::Create(&sLibAV); break;
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case 55:
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case 56: module = FFmpegDecoderModule<55>::Create(&sLibAV); break;
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case 57: module = FFmpegDecoderModule<57>::Create(&sLibAV); break;
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case 58: module = FFmpegDecoderModule<58>::Create(&sLibAV); break;
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default: module = nullptr;
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}
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return module.forget();
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}
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/* static */ const char*
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FFmpegRuntimeLinker::LinkStatusString()
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{
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switch (sLinkStatus) {
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case LinkStatus_INIT:
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return "Libavcodec not initialized yet";
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case LinkStatus_SUCCEEDED:
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return "Libavcodec linking succeeded";
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case LinkStatus_INVALID_FFMPEG_CANDIDATE:
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return "Invalid FFMpeg libavcodec candidate";
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case LinkStatus_UNUSABLE_LIBAV57:
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return "Unusable LibAV's libavcodec 57";
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case LinkStatus_INVALID_LIBAV_CANDIDATE:
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return "Invalid LibAV libavcodec candidate";
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case LinkStatus_OBSOLETE_FFMPEG:
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return "Obsolete FFMpeg libavcodec candidate";
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case LinkStatus_OBSOLETE_LIBAV:
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return "Obsolete LibAV libavcodec candidate";
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case LinkStatus_INVALID_CANDIDATE:
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return "Invalid libavcodec candidate";
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case LinkStatus_NOT_FOUND:
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return "Libavcodec not found";
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}
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MOZ_ASSERT_UNREACHABLE("Unknown sLinkStatus value");
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return "?";
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}
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} // namespace mozilla
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