/* -*- 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 "MP4Decoder.h" #include "MediaContentType.h" #include "MediaDecoderStateMachine.h" #include "MP4Demuxer.h" #include "mozilla/Preferences.h" #include "nsCharSeparatedTokenizer.h" #include "mozilla/CDMProxy.h" #include "mozilla/Logging.h" #include "mozilla/SharedThreadPool.h" #include "nsMimeTypes.h" #include "VideoUtils.h" #ifdef XP_WIN #include "mozilla/WindowsVersion.h" #endif #ifdef MOZ_WIDGET_ANDROID #include "nsIGfxInfo.h" #endif #include "mozilla/layers/LayersTypes.h" #include "PDMFactory.h" namespace mozilla { MP4Decoder::MP4Decoder(MediaDecoderOwner* aOwner) : MediaDecoder(aOwner) { } MediaDecoderStateMachine* MP4Decoder::CreateStateMachine() { mReader = new MediaFormatReader(this, new MP4Demuxer(GetResource()), GetVideoFrameContainer()); return new MediaDecoderStateMachine(this, mReader); } static bool IsWhitelistedH264Codec(const nsAString& aCodec) { int16_t profile = 0, level = 0; if (!ExtractH264CodecDetails(aCodec, profile, level)) { return false; } // Just assume what we can play on all platforms the codecs/formats that // WMF can play, since we don't have documentation about what other // platforms can play... According to the WMF documentation: // http://msdn.microsoft.com/en-us/library/windows/desktop/dd797815%28v=vs.85%29.aspx // "The Media Foundation H.264 video decoder is a Media Foundation Transform // that supports decoding of Baseline, Main, and High profiles, up to level // 5.1.". We also report that we can play Extended profile, as there are // bitstreams that are Extended compliant that are also Baseline compliant. return level >= H264_LEVEL_1 && level <= H264_LEVEL_5_1 && (profile == H264_PROFILE_BASE || profile == H264_PROFILE_MAIN || profile == H264_PROFILE_EXTENDED || profile == H264_PROFILE_HIGH); } /* static */ bool MP4Decoder::CanHandleMediaType(const MediaContentType& aType, DecoderDoctorDiagnostics* aDiagnostics) { if (!IsEnabled()) { return false; } // Whitelist MP4 types, so they explicitly match what we encounter on // the web, as opposed to what we use internally (i.e. what our demuxers // etc output). const bool isMP4Audio = aType.GetMIMEType().EqualsASCII("audio/mp4") || aType.GetMIMEType().EqualsASCII("audio/x-m4a"); const bool isMP4Video = // On B2G, treat 3GPP as MP4 when Gonk PDM is available. #ifdef MOZ_GONK_MEDIACODEC aType.GetMIMEType().EqualsASCII(VIDEO_3GPP) || #endif aType.GetMIMEType().EqualsASCII("video/mp4") || aType.GetMIMEType().EqualsASCII("video/quicktime") || aType.GetMIMEType().EqualsASCII("video/x-m4v"); if (!isMP4Audio && !isMP4Video) { return false; } nsTArray<UniquePtr<TrackInfo>> trackInfos; if (aType.GetCodecs().IsEmpty()) { // No codecs specified. Assume H.264 if (isMP4Audio) { trackInfos.AppendElement( CreateTrackInfoWithMIMETypeAndContentTypeExtraParameters( NS_LITERAL_CSTRING("audio/mp4a-latm"), aType)); } else { MOZ_ASSERT(isMP4Video); trackInfos.AppendElement( CreateTrackInfoWithMIMETypeAndContentTypeExtraParameters( NS_LITERAL_CSTRING("video/avc"), aType)); } } else { // Verify that all the codecs specified are ones that we expect that // we can play. nsTArray<nsString> codecs; if (!ParseCodecsString(aType.GetCodecs(), codecs)) { return false; } for (const nsString& codec : codecs) { if (IsAACCodecString(codec)) { trackInfos.AppendElement( CreateTrackInfoWithMIMETypeAndContentTypeExtraParameters( NS_LITERAL_CSTRING("audio/mp4a-latm"), aType)); continue; } if (codec.EqualsLiteral("mp3")) { trackInfos.AppendElement( CreateTrackInfoWithMIMETypeAndContentTypeExtraParameters( NS_LITERAL_CSTRING("audio/mpeg"), aType)); continue; } if (codec.EqualsLiteral("opus")) { trackInfos.AppendElement( CreateTrackInfoWithMIMETypeAndContentTypeExtraParameters( NS_LITERAL_CSTRING("audio/opus"), aType)); continue; } if (codec.EqualsLiteral("flac")) { trackInfos.AppendElement( CreateTrackInfoWithMIMETypeAndContentTypeExtraParameters( NS_LITERAL_CSTRING("audio/flac"), aType)); continue; } // Note: Only accept H.264 in a video content type, not in an audio // content type. if (IsWhitelistedH264Codec(codec) && isMP4Video) { trackInfos.AppendElement( CreateTrackInfoWithMIMETypeAndContentTypeExtraParameters( NS_LITERAL_CSTRING("video/avc"), aType)); continue; } // Some unsupported codec. return false; } } // Verify that we have a PDM that supports the whitelisted types. RefPtr<PDMFactory> platform = new PDMFactory(); for (const auto& trackInfo : trackInfos) { if (!trackInfo || !platform->Supports(*trackInfo, aDiagnostics)) { return false; } } return true; } /* static */ bool MP4Decoder::IsH264(const nsACString& aMimeType) { return aMimeType.EqualsLiteral("video/mp4") || aMimeType.EqualsLiteral("video/avc"); } /* static */ bool MP4Decoder::IsAAC(const nsACString& aMimeType) { return aMimeType.EqualsLiteral("audio/mp4a-latm"); } /* static */ bool MP4Decoder::IsEnabled() { return Preferences::GetBool("media.mp4.enabled", true); } // sTestH264ExtraData represents the content of the avcC atom found in // an AVC1 h264 video. It contains the H264 SPS and PPS NAL. // the structure of the avcC atom is as follow: // write(0x1); // version, always 1 // write(sps[0].data[1]); // profile // write(sps[0].data[2]); // compatibility // write(sps[0].data[3]); // level // write(0xFC | 3); // reserved (6 bits), NULA length size - 1 (2 bits) // write(0xE0 | 1); // reserved (3 bits), num of SPS (5 bits) // write_word(sps[0].size); // 2 bytes for length of SPS // for(size_t i=0 ; i < sps[0].size ; ++i) // write(sps[0].data[i]); // data of SPS // write(&b, pps.size()); // num of PPS // for(size_t i=0 ; i < pps.size() ; ++i) { // write_word(pps[i].size); // 2 bytes for length of PPS // for(size_t j=0 ; j < pps[i].size ; ++j) // write(pps[i].data[j]); // data of PPS // } // } // here we have a h264 Baseline, 640x360 // We use a 640x360 extradata, as some video framework (Apple VT) will never // attempt to use hardware decoding for small videos. static const uint8_t sTestH264ExtraData[] = { 0x01, 0x42, 0xc0, 0x1e, 0xff, 0xe1, 0x00, 0x17, 0x67, 0x42, 0xc0, 0x1e, 0xbb, 0x40, 0x50, 0x17, 0xfc, 0xb8, 0x08, 0x80, 0x00, 0x00, 0x32, 0x00, 0x00, 0x0b, 0xb5, 0x07, 0x8b, 0x17, 0x50, 0x01, 0x00, 0x04, 0x68, 0xce, 0x32, 0xc8 }; static already_AddRefed<MediaDataDecoder> CreateTestH264Decoder(layers::KnowsCompositor* aKnowsCompositor, VideoInfo& aConfig, TaskQueue* aTaskQueue) { aConfig.mMimeType = "video/avc"; aConfig.mId = 1; aConfig.mDuration = 40000; aConfig.mMediaTime = 0; aConfig.mImage = aConfig.mDisplay = nsIntSize(640, 360); aConfig.mExtraData = new MediaByteBuffer(); aConfig.mExtraData->AppendElements(sTestH264ExtraData, MOZ_ARRAY_LENGTH(sTestH264ExtraData)); RefPtr<PDMFactory> platform = new PDMFactory(); RefPtr<MediaDataDecoder> decoder(platform->CreateDecoder({ aConfig, aTaskQueue, aKnowsCompositor })); return decoder.forget(); } /* static */ already_AddRefed<dom::Promise> MP4Decoder::IsVideoAccelerated(layers::KnowsCompositor* aKnowsCompositor, nsIGlobalObject* aParent) { MOZ_ASSERT(NS_IsMainThread()); ErrorResult rv; RefPtr<dom::Promise> promise; promise = dom::Promise::Create(aParent, rv); if (rv.Failed()) { rv.SuppressException(); return nullptr; } RefPtr<TaskQueue> taskQueue = new TaskQueue(GetMediaThreadPool(MediaThreadType::PLATFORM_DECODER)); VideoInfo config; RefPtr<MediaDataDecoder> decoder(CreateTestH264Decoder(aKnowsCompositor, config, taskQueue)); if (!decoder) { taskQueue->BeginShutdown(); taskQueue->AwaitShutdownAndIdle(); promise->MaybeResolve(NS_LITERAL_STRING("No; Failed to create H264 decoder")); return promise.forget(); } decoder->Init() ->Then(AbstractThread::MainThread(), __func__, [promise, decoder, taskQueue] (TrackInfo::TrackType aTrack) { nsCString failureReason; bool ok = decoder->IsHardwareAccelerated(failureReason); nsAutoString result; if (ok) { result.AssignLiteral("Yes"); } else { result.AssignLiteral("No"); } if (failureReason.Length()) { result.AppendLiteral("; "); AppendUTF8toUTF16(failureReason, result); } decoder->Shutdown(); taskQueue->BeginShutdown(); taskQueue->AwaitShutdownAndIdle(); promise->MaybeResolve(result); }, [promise, decoder, taskQueue] (MediaResult aError) { decoder->Shutdown(); taskQueue->BeginShutdown(); taskQueue->AwaitShutdownAndIdle(); promise->MaybeResolve(NS_LITERAL_STRING("No; Failed to initialize H264 decoder")); }); return promise.forget(); } void MP4Decoder::GetMozDebugReaderData(nsAString& aString) { if (mReader) { mReader->GetMozDebugReaderData(aString); } } } // namespace mozilla