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a60c99b535
MozReview-Commit-ID: JH20pUNstwx --HG-- rename : dom/media/fmp4/MP4Decoder.cpp => dom/media/mp4/MP4Decoder.cpp rename : dom/media/fmp4/MP4Decoder.h => dom/media/mp4/MP4Decoder.h rename : dom/media/fmp4/MP4Demuxer.cpp => dom/media/mp4/MP4Demuxer.cpp rename : dom/media/fmp4/MP4Demuxer.h => dom/media/mp4/MP4Demuxer.h rename : dom/media/fmp4/moz.build => dom/media/mp4/moz.build extra : rebase_source : b157e5589bd5296c56d505a5d27a768004bd7202
173 lines
5.5 KiB
C++
173 lines
5.5 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 "MP4Decoder.h"
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#include "MediaContainerType.h"
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#include "MediaPrefs.h"
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#include "MP4Demuxer.h"
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#include "nsMimeTypes.h"
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#include "VideoUtils.h"
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#include "PDMFactory.h"
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namespace mozilla {
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static bool
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IsWhitelistedH264Codec(const nsAString& aCodec)
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{
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int16_t profile = 0, level = 0;
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if (!ExtractH264CodecDetails(aCodec, profile, level)) {
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return false;
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}
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// Just assume what we can play on all platforms the codecs/formats that
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// WMF can play, since we don't have documentation about what other
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// platforms can play... According to the WMF documentation:
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// http://msdn.microsoft.com/en-us/library/windows/desktop/dd797815%28v=vs.85%29.aspx
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// "The Media Foundation H.264 video decoder is a Media Foundation Transform
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// that supports decoding of Baseline, Main, and High profiles, up to level
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// 5.1.". We also report that we can play Extended profile, as there are
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// bitstreams that are Extended compliant that are also Baseline compliant.
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return level >= H264_LEVEL_1 &&
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level <= H264_LEVEL_5_1 &&
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(profile == H264_PROFILE_BASE ||
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profile == H264_PROFILE_MAIN ||
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profile == H264_PROFILE_EXTENDED ||
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profile == H264_PROFILE_HIGH);
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}
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/* static */
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bool
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MP4Decoder::IsSupportedTypeWithoutDiagnostics(
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const MediaContainerType& aContainerType)
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{
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return IsSupportedType(aContainerType, nullptr);
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}
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/* static */
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bool
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MP4Decoder::IsSupportedType(const MediaContainerType& aType,
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DecoderDoctorDiagnostics* aDiagnostics)
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{
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if (!IsEnabled()) {
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return false;
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}
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// Whitelist MP4 types, so they explicitly match what we encounter on
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// the web, as opposed to what we use internally (i.e. what our demuxers
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// etc output).
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const bool isAudio = aType.Type() == MEDIAMIMETYPE("audio/mp4") ||
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aType.Type() == MEDIAMIMETYPE("audio/x-m4a");
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const bool isVideo = aType.Type() == MEDIAMIMETYPE("video/mp4") ||
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aType.Type() == MEDIAMIMETYPE("video/quicktime") ||
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aType.Type() == MEDIAMIMETYPE("video/x-m4v");
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if (!isAudio && !isVideo) {
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return false;
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}
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nsTArray<UniquePtr<TrackInfo>> trackInfos;
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if (aType.ExtendedType().Codecs().IsEmpty()) {
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// No codecs specified. Assume H.264
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if (isAudio) {
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trackInfos.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("audio/mp4a-latm"), aType));
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} else {
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MOZ_ASSERT(isVideo);
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trackInfos.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("video/avc"), aType));
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}
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} else {
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// Verify that all the codecs specified are ones that we expect that
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// we can play.
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for (const auto& codec : aType.ExtendedType().Codecs().Range()) {
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if (IsAACCodecString(codec)) {
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trackInfos.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("audio/mp4a-latm"), aType));
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continue;
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}
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if (codec.EqualsLiteral("mp3")) {
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trackInfos.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("audio/mpeg"), aType));
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continue;
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}
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if (codec.EqualsLiteral("opus")) {
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trackInfos.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("audio/opus"), aType));
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continue;
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}
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if (codec.EqualsLiteral("flac")) {
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trackInfos.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("audio/flac"), aType));
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continue;
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}
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if (IsVP9CodecString(codec)) {
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auto trackInfo =
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("video/vp9"), aType);
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uint8_t profile = 0;
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uint8_t level = 0;
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uint8_t bitDepth = 0;
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if (ExtractVPXCodecDetails(codec, profile, level, bitDepth)) {
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trackInfo->GetAsVideoInfo()->mBitDepth = bitDepth;
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}
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trackInfos.AppendElement(Move(trackInfo));
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continue;
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}
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// Note: Only accept H.264 in a video content type, not in an audio
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// content type.
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if (IsWhitelistedH264Codec(codec) && isVideo) {
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trackInfos.AppendElement(
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CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
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NS_LITERAL_CSTRING("video/avc"), aType));
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continue;
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}
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// Some unsupported codec.
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return false;
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}
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}
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// Verify that we have a PDM that supports the whitelisted types.
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RefPtr<PDMFactory> platform = new PDMFactory();
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for (const auto& trackInfo : trackInfos) {
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if (!trackInfo || !platform->Supports(*trackInfo, aDiagnostics)) {
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return false;
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}
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}
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return true;
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}
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/* static */
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bool
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MP4Decoder::IsH264(const nsACString& aMimeType)
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{
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return aMimeType.EqualsLiteral("video/mp4") ||
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aMimeType.EqualsLiteral("video/avc");
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}
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/* static */
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bool
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MP4Decoder::IsAAC(const nsACString& aMimeType)
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{
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return aMimeType.EqualsLiteral("audio/mp4a-latm");
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}
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/* static */
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bool
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MP4Decoder::IsEnabled()
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{
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return MediaPrefs::MP4Enabled();
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}
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} // namespace mozilla
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