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Diffstat (limited to 'dom/media/mediasource/ContainerParser.cpp')
| -rw-r--r-- | dom/media/mediasource/ContainerParser.cpp | 716 |
1 files changed, 716 insertions, 0 deletions
diff --git a/dom/media/mediasource/ContainerParser.cpp b/dom/media/mediasource/ContainerParser.cpp new file mode 100644 index 000000000..5267e9315 --- /dev/null +++ b/dom/media/mediasource/ContainerParser.cpp @@ -0,0 +1,716 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* 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 "ContainerParser.h" + +#include "WebMBufferedParser.h" +#include "mozilla/EndianUtils.h" +#include "mozilla/ErrorResult.h" +#include "mp4_demuxer/MoofParser.h" +#include "mozilla/Logging.h" +#include "mozilla/Maybe.h" +#include "MediaData.h" +#ifdef MOZ_FMP4 +#include "MP4Stream.h" +#include "mp4_demuxer/AtomType.h" +#include "mp4_demuxer/ByteReader.h" +#endif +#include "nsAutoPtr.h" +#include "SourceBufferResource.h" +#include <algorithm> + +extern mozilla::LogModule* GetMediaSourceSamplesLog(); + +#define STRINGIFY(x) #x +#define TOSTRING(x) STRINGIFY(x) +#define MSE_DEBUG(name, arg, ...) MOZ_LOG(GetMediaSourceSamplesLog(), mozilla::LogLevel::Debug, (TOSTRING(name) "(%p:%s)::%s: " arg, this, mType.get(), __func__, ##__VA_ARGS__)) +#define MSE_DEBUGV(name, arg, ...) MOZ_LOG(GetMediaSourceSamplesLog(), mozilla::LogLevel::Verbose, (TOSTRING(name) "(%p:%s)::%s: " arg, this, mType.get(), __func__, ##__VA_ARGS__)) + +namespace mozilla { + +ContainerParser::ContainerParser(const nsACString& aType) + : mHasInitData(false) + , mType(aType) +{ +} + +ContainerParser::~ContainerParser() = default; + +MediaResult +ContainerParser::IsInitSegmentPresent(MediaByteBuffer* aData) +{ + MSE_DEBUG(ContainerParser, "aLength=%u [%x%x%x%x]", + aData->Length(), + aData->Length() > 0 ? (*aData)[0] : 0, + aData->Length() > 1 ? (*aData)[1] : 0, + aData->Length() > 2 ? (*aData)[2] : 0, + aData->Length() > 3 ? (*aData)[3] : 0); + return NS_ERROR_NOT_AVAILABLE; +} + +MediaResult +ContainerParser::IsMediaSegmentPresent(MediaByteBuffer* aData) +{ + MSE_DEBUG(ContainerParser, "aLength=%u [%x%x%x%x]", + aData->Length(), + aData->Length() > 0 ? (*aData)[0] : 0, + aData->Length() > 1 ? (*aData)[1] : 0, + aData->Length() > 2 ? (*aData)[2] : 0, + aData->Length() > 3 ? (*aData)[3] : 0); + return NS_ERROR_NOT_AVAILABLE; +} + +MediaResult +ContainerParser::ParseStartAndEndTimestamps(MediaByteBuffer* aData, + int64_t& aStart, int64_t& aEnd) +{ + return NS_ERROR_NOT_AVAILABLE; +} + +bool +ContainerParser::TimestampsFuzzyEqual(int64_t aLhs, int64_t aRhs) +{ + return llabs(aLhs - aRhs) <= GetRoundingError(); +} + +int64_t +ContainerParser::GetRoundingError() +{ + NS_WARNING("Using default ContainerParser::GetRoundingError implementation"); + return 0; +} + +bool +ContainerParser::HasCompleteInitData() +{ + return mHasInitData && !!mInitData->Length(); +} + +MediaByteBuffer* +ContainerParser::InitData() +{ + return mInitData; +} + +MediaByteRange +ContainerParser::InitSegmentRange() +{ + return mCompleteInitSegmentRange; +} + +MediaByteRange +ContainerParser::MediaHeaderRange() +{ + return mCompleteMediaHeaderRange; +} + +MediaByteRange +ContainerParser::MediaSegmentRange() +{ + return mCompleteMediaSegmentRange; +} + +class WebMContainerParser : public ContainerParser { +public: + explicit WebMContainerParser(const nsACString& aType) + : ContainerParser(aType) + , mParser(0) + , mOffset(0) + {} + + static const unsigned NS_PER_USEC = 1000; + static const unsigned USEC_PER_SEC = 1000000; + + MediaResult IsInitSegmentPresent(MediaByteBuffer* aData) override + { + ContainerParser::IsInitSegmentPresent(aData); + // XXX: This is overly primitive, needs to collect data as it's appended + // to the SB and handle, rather than assuming everything is present in a + // single aData segment. + // 0x1a45dfa3 // EBML + // ... + // DocType == "webm" + // ... + // 0x18538067 // Segment (must be "unknown" size or contain a value large + // enough to include the Segment Information and Tracks + // elements that follow) + // 0x1549a966 // -> Segment Info + // 0x1654ae6b // -> One or more Tracks + + // 0x1a45dfa3 // EBML + if (aData->Length() < 4) { + return NS_ERROR_NOT_AVAILABLE; + } + if ((*aData)[0] == 0x1a && (*aData)[1] == 0x45 && (*aData)[2] == 0xdf && + (*aData)[3] == 0xa3) { + return NS_OK; + } + return MediaResult(NS_ERROR_FAILURE, RESULT_DETAIL("Invalid webm content")); + } + + MediaResult IsMediaSegmentPresent(MediaByteBuffer* aData) override + { + ContainerParser::IsMediaSegmentPresent(aData); + // XXX: This is overly primitive, needs to collect data as it's appended + // to the SB and handle, rather than assuming everything is present in a + // single aData segment. + // 0x1a45dfa3 // EBML + // ... + // DocType == "webm" + // ... + // 0x18538067 // Segment (must be "unknown" size) + // 0x1549a966 // -> Segment Info + // 0x1654ae6b // -> One or more Tracks + + // 0x1f43b675 // Cluster + if (aData->Length() < 4) { + return NS_ERROR_NOT_AVAILABLE; + } + if ((*aData)[0] == 0x1f && (*aData)[1] == 0x43 && (*aData)[2] == 0xb6 && + (*aData)[3] == 0x75) { + return NS_OK; + } + // 0x1c53bb6b // Cues + if ((*aData)[0] == 0x1c && (*aData)[1] == 0x53 && (*aData)[2] == 0xbb && + (*aData)[3] == 0x6b) { + return NS_OK; + } + return MediaResult(NS_ERROR_FAILURE, RESULT_DETAIL("Invalid webm content")); + } + + MediaResult ParseStartAndEndTimestamps(MediaByteBuffer* aData, + int64_t& aStart, + int64_t& aEnd) override + { + bool initSegment = NS_SUCCEEDED(IsInitSegmentPresent(aData)); + + if (mLastMapping && + (initSegment || NS_SUCCEEDED(IsMediaSegmentPresent(aData)))) { + // The last data contained a complete cluster but we can only detect it + // now that a new one is starting. + // We use mOffset as end position to ensure that any blocks not reported + // by WebMBufferParser are properly skipped. + mCompleteMediaSegmentRange = MediaByteRange(mLastMapping.ref().mSyncOffset, + mOffset); + mLastMapping.reset(); + MSE_DEBUG(WebMContainerParser, "New cluster found at start, ending previous one"); + return NS_ERROR_NOT_AVAILABLE; + } + + if (initSegment) { + mOffset = 0; + mParser = WebMBufferedParser(0); + mOverlappedMapping.Clear(); + mInitData = new MediaByteBuffer(); + mResource = new SourceBufferResource(NS_LITERAL_CSTRING("video/webm")); + mCompleteMediaHeaderRange = MediaByteRange(); + mCompleteMediaSegmentRange = MediaByteRange(); + } + + // XXX if it only adds new mappings, overlapped but not available + // (e.g. overlap < 0) frames are "lost" from the reported mappings here. + nsTArray<WebMTimeDataOffset> mapping; + mapping.AppendElements(mOverlappedMapping); + mOverlappedMapping.Clear(); + ReentrantMonitor dummy("dummy"); + mParser.Append(aData->Elements(), aData->Length(), mapping, dummy); + if (mResource) { + mResource->AppendData(aData); + } + + // XXX This is a bit of a hack. Assume if there are no timecodes + // present and it's an init segment that it's _just_ an init segment. + // We should be more precise. + if (initSegment || !HasCompleteInitData()) { + if (mParser.mInitEndOffset > 0) { + MOZ_ASSERT(mParser.mInitEndOffset <= mResource->GetLength()); + if (!mInitData->SetLength(mParser.mInitEndOffset, fallible)) { + // Super unlikely OOM + return NS_ERROR_OUT_OF_MEMORY; + } + mCompleteInitSegmentRange = MediaByteRange(0, mParser.mInitEndOffset); + char* buffer = reinterpret_cast<char*>(mInitData->Elements()); + mResource->ReadFromCache(buffer, 0, mParser.mInitEndOffset); + MSE_DEBUG(WebMContainerParser, "Stashed init of %u bytes.", + mParser.mInitEndOffset); + mResource = nullptr; + } else { + MSE_DEBUG(WebMContainerParser, "Incomplete init found."); + } + mHasInitData = true; + } + mOffset += aData->Length(); + + if (mapping.IsEmpty()) { + return NS_ERROR_NOT_AVAILABLE; + } + + // Calculate media range for first media segment. + + // Check if we have a cluster finishing in the current data. + uint32_t endIdx = mapping.Length() - 1; + bool foundNewCluster = false; + while (mapping[0].mSyncOffset != mapping[endIdx].mSyncOffset) { + endIdx -= 1; + foundNewCluster = true; + } + + int32_t completeIdx = endIdx; + while (completeIdx >= 0 && mOffset < mapping[completeIdx].mEndOffset) { + MSE_DEBUG(WebMContainerParser, "block is incomplete, missing: %lld", + mapping[completeIdx].mEndOffset - mOffset); + completeIdx -= 1; + } + + // Save parsed blocks for which we do not have all data yet. + mOverlappedMapping.AppendElements(mapping.Elements() + completeIdx + 1, + mapping.Length() - completeIdx - 1); + + if (completeIdx < 0) { + mLastMapping.reset(); + return NS_ERROR_NOT_AVAILABLE; + } + + if (mCompleteMediaHeaderRange.IsEmpty()) { + mCompleteMediaHeaderRange = MediaByteRange(mapping[0].mSyncOffset, + mapping[0].mEndOffset); + } + + if (foundNewCluster && mOffset >= mapping[endIdx].mEndOffset) { + // We now have all information required to delimit a complete cluster. + int64_t endOffset = mapping[endIdx+1].mSyncOffset; + if (mapping[endIdx+1].mInitOffset > mapping[endIdx].mInitOffset) { + // We have a new init segment before this cluster. + endOffset = mapping[endIdx+1].mInitOffset; + } + mCompleteMediaSegmentRange = MediaByteRange(mapping[endIdx].mSyncOffset, + endOffset); + } else if (mapping[endIdx].mClusterEndOffset >= 0 && + mOffset >= mapping[endIdx].mClusterEndOffset) { + mCompleteMediaSegmentRange = MediaByteRange(mapping[endIdx].mSyncOffset, + mParser.EndSegmentOffset(mapping[endIdx].mClusterEndOffset)); + } + + Maybe<WebMTimeDataOffset> previousMapping; + if (completeIdx) { + previousMapping = Some(mapping[completeIdx - 1]); + } else { + previousMapping = mLastMapping; + } + + mLastMapping = Some(mapping[completeIdx]); + + if (!previousMapping && completeIdx + 1u >= mapping.Length()) { + // We have no previous nor next block available, + // so we can't estimate this block's duration. + return NS_ERROR_NOT_AVAILABLE; + } + + uint64_t frameDuration = (completeIdx + 1u < mapping.Length()) + ? mapping[completeIdx + 1].mTimecode - mapping[completeIdx].mTimecode + : mapping[completeIdx].mTimecode - previousMapping.ref().mTimecode; + aStart = mapping[0].mTimecode / NS_PER_USEC; + aEnd = (mapping[completeIdx].mTimecode + frameDuration) / NS_PER_USEC; + + MSE_DEBUG(WebMContainerParser, "[%lld, %lld] [fso=%lld, leo=%lld, l=%u processedIdx=%u fs=%lld]", + aStart, aEnd, mapping[0].mSyncOffset, + mapping[completeIdx].mEndOffset, mapping.Length(), completeIdx, + mCompleteMediaSegmentRange.mEnd); + + return NS_OK; + } + + int64_t GetRoundingError() override + { + int64_t error = mParser.GetTimecodeScale() / NS_PER_USEC; + return error * 2; + } + +private: + WebMBufferedParser mParser; + nsTArray<WebMTimeDataOffset> mOverlappedMapping; + int64_t mOffset; + Maybe<WebMTimeDataOffset> mLastMapping; +}; + +#ifdef MOZ_FMP4 +class MP4ContainerParser : public ContainerParser { +public: + explicit MP4ContainerParser(const nsACString& aType) + : ContainerParser(aType) + {} + + MediaResult IsInitSegmentPresent(MediaByteBuffer* aData) override + { + ContainerParser::IsInitSegmentPresent(aData); + // Each MP4 atom has a chunk size and chunk type. The root chunk in an MP4 + // file is the 'ftyp' atom followed by a file type. We just check for a + // vaguely valid 'ftyp' atom. + if (aData->Length() < 8) { + return NS_ERROR_NOT_AVAILABLE; + } + AtomParser parser(mType, aData); + if (!parser.IsValid()) { + return MediaResult( + NS_ERROR_FAILURE, + RESULT_DETAIL("Invalid Top-Level Box:%s", parser.LastInvalidBox())); + } + return parser.StartWithInitSegment() ? NS_OK : NS_ERROR_NOT_AVAILABLE; + } + + MediaResult IsMediaSegmentPresent(MediaByteBuffer* aData) override + { + if (aData->Length() < 8) { + return NS_ERROR_NOT_AVAILABLE; + } + AtomParser parser(mType, aData); + if (!parser.IsValid()) { + return MediaResult( + NS_ERROR_FAILURE, + RESULT_DETAIL("Invalid Box:%s", parser.LastInvalidBox())); + } + return parser.StartWithMediaSegment() ? NS_OK : NS_ERROR_NOT_AVAILABLE; + } + +private: + class AtomParser { + public: + AtomParser(const nsACString& aType, const MediaByteBuffer* aData) + { + const nsCString mType(aType); // for logging macro. + mp4_demuxer::ByteReader reader(aData); + mp4_demuxer::AtomType initAtom("ftyp"); + mp4_demuxer::AtomType mediaAtom("moof"); + + // Valid top-level boxes defined in ISO/IEC 14496-12 (Table 1) + static const mp4_demuxer::AtomType validBoxes[] = { + "ftyp", "moov", // init segment + "pdin", "free", "sidx", // optional prior moov box + "styp", "moof", "mdat", // media segment + "mfra", "skip", "meta", "meco", "ssix", "prft" // others. + "pssh", // optional with encrypted EME, though ignored. + "emsg", // ISO23009-1:2014 Section 5.10.3.3 + "bloc", "uuid" // boxes accepted by chrome. + }; + + while (reader.Remaining() >= 8) { + uint64_t size = reader.ReadU32(); + const uint8_t* typec = reader.Peek(4); + mp4_demuxer::AtomType type(reader.ReadU32()); + MSE_DEBUGV(AtomParser ,"Checking atom:'%c%c%c%c' @ %u", + typec[0], typec[1], typec[2], typec[3], + (uint32_t)reader.Offset() - 8); + if (std::find(std::begin(validBoxes), std::end(validBoxes), type) + == std::end(validBoxes)) { + // No valid box found, no point continuing. + mLastInvalidBox[0] = typec[0]; + mLastInvalidBox[1] = typec[1]; + mLastInvalidBox[2] = typec[2]; + mLastInvalidBox[3] = typec[3]; + mLastInvalidBox[4] = '\0'; + mValid = false; + break; + } + if (mInitOffset.isNothing() && + mp4_demuxer::AtomType(type) == initAtom) { + mInitOffset = Some(reader.Offset()); + } + if (mMediaOffset.isNothing() && + mp4_demuxer::AtomType(type) == mediaAtom) { + mMediaOffset = Some(reader.Offset()); + } + if (mInitOffset.isSome() && mMediaOffset.isSome()) { + // We have everything we need. + break; + } + if (size == 1) { + // 64 bits size. + if (!reader.CanReadType<uint64_t>()) { + break; + } + size = reader.ReadU64(); + } else if (size == 0) { + // Atom extends to the end of the buffer, it can't have what we're + // looking for. + break; + } + if (reader.Remaining() < size - 8) { + // Incomplete atom. + break; + } + reader.Read(size - 8); + } + } + + bool StartWithInitSegment() const + { + return mInitOffset.isSome() && + (mMediaOffset.isNothing() || mInitOffset.ref() < mMediaOffset.ref()); + } + bool StartWithMediaSegment() const + { + return mMediaOffset.isSome() && + (mInitOffset.isNothing() || mMediaOffset.ref() < mInitOffset.ref()); + } + bool IsValid() const { return mValid; } + const char* LastInvalidBox() const { return mLastInvalidBox; } + private: + Maybe<size_t> mInitOffset; + Maybe<size_t> mMediaOffset; + bool mValid = true; + char mLastInvalidBox[5]; + }; + +public: + MediaResult ParseStartAndEndTimestamps(MediaByteBuffer* aData, + int64_t& aStart, + int64_t& aEnd) override + { + bool initSegment = NS_SUCCEEDED(IsInitSegmentPresent(aData)); + if (initSegment) { + mResource = new SourceBufferResource(NS_LITERAL_CSTRING("video/mp4")); + mStream = new MP4Stream(mResource); + // We use a timestampOffset of 0 for ContainerParser, and require + // consumers of ParseStartAndEndTimestamps to add their timestamp offset + // manually. This allows the ContainerParser to be shared across different + // timestampOffsets. + mParser = new mp4_demuxer::MoofParser(mStream, 0, /* aIsAudio = */ false); + mInitData = new MediaByteBuffer(); + } else if (!mStream || !mParser) { + return NS_ERROR_NOT_AVAILABLE; + } + + mResource->AppendData(aData); + MediaByteRangeSet byteRanges; + byteRanges += + MediaByteRange(int64_t(mParser->mOffset), mResource->GetLength()); + mParser->RebuildFragmentedIndex(byteRanges); + + if (initSegment || !HasCompleteInitData()) { + MediaByteRange& range = mParser->mInitRange; + if (range.Length()) { + mCompleteInitSegmentRange = range; + if (!mInitData->SetLength(range.Length(), fallible)) { + // Super unlikely OOM + return NS_ERROR_OUT_OF_MEMORY; + } + char* buffer = reinterpret_cast<char*>(mInitData->Elements()); + mResource->ReadFromCache(buffer, range.mStart, range.Length()); + MSE_DEBUG(MP4ContainerParser ,"Stashed init of %u bytes.", + range.Length()); + } else { + MSE_DEBUG(MP4ContainerParser, "Incomplete init found."); + } + mHasInitData = true; + } + + mp4_demuxer::Interval<mp4_demuxer::Microseconds> compositionRange = + mParser->GetCompositionRange(byteRanges); + + mCompleteMediaHeaderRange = mParser->FirstCompleteMediaHeader(); + mCompleteMediaSegmentRange = mParser->FirstCompleteMediaSegment(); + ErrorResult rv; + if (HasCompleteInitData()) { + mResource->EvictData(mParser->mOffset, mParser->mOffset, rv); + } + if (NS_WARN_IF(rv.Failed())) { + rv.SuppressException(); + return NS_ERROR_OUT_OF_MEMORY; + } + + if (compositionRange.IsNull()) { + return NS_ERROR_NOT_AVAILABLE; + } + aStart = compositionRange.start; + aEnd = compositionRange.end; + MSE_DEBUG(MP4ContainerParser, "[%lld, %lld]", + aStart, aEnd); + return NS_OK; + } + + // Gaps of up to 35ms (marginally longer than a single frame at 30fps) are considered + // to be sequential frames. + int64_t GetRoundingError() override + { + return 35000; + } + +private: + RefPtr<MP4Stream> mStream; + nsAutoPtr<mp4_demuxer::MoofParser> mParser; +}; +#endif // MOZ_FMP4 + +#ifdef MOZ_FMP4 +class ADTSContainerParser : public ContainerParser { +public: + explicit ADTSContainerParser(const nsACString& aType) + : ContainerParser(aType) + {} + + typedef struct { + size_t header_length; // Length of just the initialization data. + size_t frame_length; // Includes header_length; + uint8_t aac_frames; // Number of AAC frames in the ADTS frame. + bool have_crc; + } Header; + + /// Helper to parse the ADTS header, returning data we care about. + /// Returns true if the header is parsed successfully. + /// Returns false if the header is invalid or incomplete, + /// without modifying the passed-in Header object. + bool Parse(MediaByteBuffer* aData, Header& header) + { + MOZ_ASSERT(aData); + + // ADTS initialization segments are just the packet header. + if (aData->Length() < 7) { + MSE_DEBUG(ADTSContainerParser, "buffer too short for header."); + return false; + } + // Check 0xfffx sync word plus layer 0. + if (((*aData)[0] != 0xff) || (((*aData)[1] & 0xf6) != 0xf0)) { + MSE_DEBUG(ADTSContainerParser, "no syncword."); + return false; + } + bool have_crc = !((*aData)[1] & 0x01); + if (have_crc && aData->Length() < 9) { + MSE_DEBUG(ADTSContainerParser, "buffer too short for header with crc."); + return false; + } + uint8_t frequency_index = ((*aData)[2] & 0x3c) >> 2; + MOZ_ASSERT(frequency_index < 16); + if (frequency_index == 15) { + MSE_DEBUG(ADTSContainerParser, "explicit frequency disallowed."); + return false; + } + size_t header_length = have_crc ? 9 : 7; + size_t data_length = (((*aData)[3] & 0x03) << 11) || + (((*aData)[4] & 0xff) << 3) || + (((*aData)[5] & 0xe0) >> 5); + uint8_t frames = ((*aData)[6] & 0x03) + 1; + MOZ_ASSERT(frames > 0); + MOZ_ASSERT(frames < 4); + + // Return successfully parsed data. + header.header_length = header_length; + header.frame_length = header_length + data_length; + header.aac_frames = frames; + header.have_crc = have_crc; + return true; + } + + MediaResult IsInitSegmentPresent(MediaByteBuffer* aData) override + { + // Call superclass for logging. + ContainerParser::IsInitSegmentPresent(aData); + + Header header; + if (!Parse(aData, header)) { + return NS_ERROR_NOT_AVAILABLE; + } + + MSE_DEBUGV(ADTSContainerParser, "%llu byte frame %d aac frames%s", + (unsigned long long)header.frame_length, (int)header.aac_frames, + header.have_crc ? " crc" : ""); + + return NS_OK; + } + + MediaResult IsMediaSegmentPresent(MediaByteBuffer* aData) override + { + // Call superclass for logging. + ContainerParser::IsMediaSegmentPresent(aData); + + // Make sure we have a header so we know how long the frame is. + // NB this assumes the media segment buffer starts with an + // initialization segment. Since every frame has an ADTS header + // this is a normal place to divide packets, but we can re-parse + // mInitData if we need to handle separate media segments. + Header header; + if (!Parse(aData, header)) { + return NS_ERROR_NOT_AVAILABLE; + } + // We're supposed to return true as long as aData contains the + // start of a media segment, whether or not it's complete. So + // return true if we have any data beyond the header. + if (aData->Length() <= header.header_length) { + return NS_ERROR_NOT_AVAILABLE; + } + + // We should have at least a partial frame. + return NS_OK; + } + + MediaResult ParseStartAndEndTimestamps(MediaByteBuffer* aData, + int64_t& aStart, + int64_t& aEnd) override + { + // ADTS header. + Header header; + if (!Parse(aData, header)) { + return NS_ERROR_NOT_AVAILABLE; + } + mHasInitData = true; + mCompleteInitSegmentRange = MediaByteRange(0, int64_t(header.header_length)); + + // Cache raw header in case the caller wants a copy. + mInitData = new MediaByteBuffer(header.header_length); + mInitData->AppendElements(aData->Elements(), header.header_length); + + // Check that we have enough data for the frame body. + if (aData->Length() < header.frame_length) { + MSE_DEBUGV(ADTSContainerParser, "Not enough data for %llu byte frame" + " in %llu byte buffer.", + (unsigned long long)header.frame_length, + (unsigned long long)(aData->Length())); + return NS_ERROR_NOT_AVAILABLE; + } + mCompleteMediaSegmentRange = MediaByteRange(header.header_length, + header.frame_length); + // The ADTS MediaSource Byte Stream Format document doesn't + // define media header. Just treat it the same as the whole + // media segment. + mCompleteMediaHeaderRange = mCompleteMediaSegmentRange; + + MSE_DEBUG(ADTSContainerParser, "[%lld, %lld]", + aStart, aEnd); + // We don't update timestamps, regardless. + return NS_ERROR_NOT_AVAILABLE; + } + + // Audio shouldn't have gaps. + // Especially when we generate the timestamps ourselves. + int64_t GetRoundingError() override + { + return 0; + } +}; +#endif // MOZ_FMP4 + +/*static*/ ContainerParser* +ContainerParser::CreateForMIMEType(const nsACString& aType) +{ + if (aType.LowerCaseEqualsLiteral("video/webm") || aType.LowerCaseEqualsLiteral("audio/webm")) { + return new WebMContainerParser(aType); + } + +#ifdef MOZ_FMP4 + if (aType.LowerCaseEqualsLiteral("video/mp4") || aType.LowerCaseEqualsLiteral("audio/mp4")) { + return new MP4ContainerParser(aType); + } + if (aType.LowerCaseEqualsLiteral("audio/aac")) { + return new ADTSContainerParser(aType); + } +#endif + + return new ContainerParser(aType); +} + +#undef MSE_DEBUG +#undef MSE_DEBUGV + +} // namespace mozilla |