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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 "MP4Decoder.h"
#include "H264.h"
#include "MP4Demuxer.h"
#include "MediaContainerType.h"
#include "PDMFactory.h"
#include "VideoUtils.h"
#include "mozilla/StaticPrefs_media.h"
#include "mozilla/gfx/Tools.h"
#include "nsMimeTypes.h"
namespace mozilla {
static bool IsWhitelistedH264Codec(const nsAString& aCodec) {
uint8_t profile = 0, constraint = 0, level = 0;
if (!ExtractH264CodecDetails(aCodec, profile, constraint, 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:
// "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 extend the limit to level 5.2, relying on the decoder to handle
// any potential errors, the level limit being rather arbitrary.
// 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_2 &&
(profile == H264_PROFILE_BASE || profile == H264_PROFILE_MAIN ||
profile == H264_PROFILE_EXTENDED || profile == H264_PROFILE_HIGH);
}
/* static */
bool MP4Decoder::IsSupportedTypeWithoutDiagnostics(
const MediaContainerType& aContainerType) {
return IsSupportedType(aContainerType, nullptr);
}
static bool IsTypeValid(const MediaContainerType& aType) {
// 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).
return aType.Type() == MEDIAMIMETYPE("audio/mp4") ||
aType.Type() == MEDIAMIMETYPE("audio/x-m4a") ||
aType.Type() == MEDIAMIMETYPE("video/mp4") ||
aType.Type() == MEDIAMIMETYPE("video/quicktime") ||
aType.Type() == MEDIAMIMETYPE("video/x-m4v");
}
/* statis */
nsTArray<UniquePtr<TrackInfo>> MP4Decoder::GetTracksInfo(
const MediaContainerType& aType, MediaResult& aError) {
nsTArray<UniquePtr<TrackInfo>> tracks;
if (!IsTypeValid(aType)) {
aError = MediaResult(
NS_ERROR_DOM_MEDIA_FATAL_ERR,
RESULT_DETAIL("Invalid type:%s", aType.Type().AsString().get()));
return tracks;
}
aError = NS_OK;
const MediaCodecs& codecs = aType.ExtendedType().Codecs();
if (codecs.IsEmpty()) {
return tracks;
}
const bool isVideo = aType.Type() == MEDIAMIMETYPE("video/mp4") ||
aType.Type() == MEDIAMIMETYPE("video/quicktime") ||
aType.Type() == MEDIAMIMETYPE("video/x-m4v");
for (const auto& codec : codecs.Range()) {
if (IsAACCodecString(codec)) {
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"audio/mp4a-latm"_ns, aType));
continue;
}
if (codec.EqualsLiteral("mp3")) {
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"audio/mpeg"_ns, aType));
continue;
}
if (codec.EqualsLiteral("opus") || codec.EqualsLiteral("flac")) {
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"audio/"_ns + NS_ConvertUTF16toUTF8(codec), aType));
continue;
}
if (IsVP9CodecString(codec)) {
auto trackInfo =
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"video/vp9"_ns, aType);
uint8_t profile = 0;
uint8_t level = 0;
uint8_t bitDepth = 0;
if (ExtractVPXCodecDetails(codec, profile, level, bitDepth)) {
trackInfo->GetAsVideoInfo()->mColorDepth =
gfx::ColorDepthForBitDepth(bitDepth);
}
tracks.AppendElement(std::move(trackInfo));
continue;
}
#ifdef MOZ_AV1
if (IsAV1CodecString(codec)) {
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"video/av1"_ns, aType));
continue;
}
#endif
if (isVideo && IsWhitelistedH264Codec(codec)) {
auto trackInfo =
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"video/avc"_ns, aType);
uint8_t profile = 0, constraint = 0, level = 0;
MOZ_ALWAYS_TRUE(
ExtractH264CodecDetails(codec, profile, constraint, level));
uint32_t width = aType.ExtendedType().GetWidth().refOr(1280);
uint32_t height = aType.ExtendedType().GetHeight().refOr(720);
trackInfo->GetAsVideoInfo()->mExtraData =
H264::CreateExtraData(profile, constraint, level, {width, height});
tracks.AppendElement(std::move(trackInfo));
continue;
}
// Unknown codec
aError = MediaResult(
NS_ERROR_DOM_MEDIA_FATAL_ERR,
RESULT_DETAIL("Unknown codec:%s", NS_ConvertUTF16toUTF8(codec).get()));
}
return tracks;
}
/* static */
bool MP4Decoder::IsSupportedType(const MediaContainerType& aType,
DecoderDoctorDiagnostics* aDiagnostics) {
if (!IsEnabled()) {
return false;
}
MediaResult rv = NS_OK;
auto tracks = GetTracksInfo(aType, rv);
if (NS_FAILED(rv)) {
return false;
}
if (tracks.IsEmpty()) {
// No codecs specified. Assume H.264 or AAC
if (aType.Type() == MEDIAMIMETYPE("audio/mp4") ||
aType.Type() == MEDIAMIMETYPE("audio/x-m4a")) {
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"audio/mp4a-latm"_ns, aType));
} else {
tracks.AppendElement(
CreateTrackInfoWithMIMETypeAndContainerTypeExtraParameters(
"video/avc"_ns, aType));
}
}
// Verify that we have a PDM that supports the whitelisted types.
RefPtr<PDMFactory> platform = new PDMFactory();
for (const auto& track : tracks) {
if (!track ||
!platform->Supports(SupportDecoderParams(*track), 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 StaticPrefs::media_mp4_enabled(); }
/* static */
nsTArray<UniquePtr<TrackInfo>> MP4Decoder::GetTracksInfo(
const MediaContainerType& aType) {
MediaResult rv = NS_OK;
return GetTracksInfo(aType, rv);
}
} // namespace mozilla