зеркало из https://github.com/mozilla/gecko-dev.git
730 строки
18 KiB
C++
730 строки
18 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 "WaveDemuxer.h"
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#include <inttypes.h>
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#include <algorithm>
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#include "mozilla/Assertions.h"
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#include "mozilla/EndianUtils.h"
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#include "BufferReader.h"
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#include "VideoUtils.h"
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#include "TimeUnits.h"
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using mozilla::media::TimeIntervals;
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using mozilla::media::TimeUnit;
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namespace mozilla {
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// WAVDemuxer
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WAVDemuxer::WAVDemuxer(MediaResource* aSource) : mSource(aSource) {
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DDLINKCHILD("source", aSource);
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}
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bool WAVDemuxer::InitInternal() {
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if (!mTrackDemuxer) {
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mTrackDemuxer = new WAVTrackDemuxer(mSource.GetResource());
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DDLINKCHILD("track demuxer", mTrackDemuxer.get());
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}
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return mTrackDemuxer->Init();
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}
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RefPtr<WAVDemuxer::InitPromise> WAVDemuxer::Init() {
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if (!InitInternal()) {
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return InitPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_METADATA_ERR,
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__func__);
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}
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return InitPromise::CreateAndResolve(NS_OK, __func__);
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}
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uint32_t WAVDemuxer::GetNumberTracks(TrackInfo::TrackType aType) const {
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return aType == TrackInfo::kAudioTrack ? 1u : 0u;
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}
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already_AddRefed<MediaTrackDemuxer> WAVDemuxer::GetTrackDemuxer(
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TrackInfo::TrackType aType, uint32_t aTrackNumber) {
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if (!mTrackDemuxer) {
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return nullptr;
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}
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return RefPtr<WAVTrackDemuxer>(mTrackDemuxer).forget();
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}
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bool WAVDemuxer::IsSeekable() const { return true; }
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// WAVTrackDemuxer
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WAVTrackDemuxer::WAVTrackDemuxer(MediaResource* aSource)
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: mSource(aSource),
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mOffset(0),
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mFirstChunkOffset(0),
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mNumParsedChunks(0),
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mChunkIndex(0),
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mDataLength(0),
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mTotalChunkLen(0),
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mSamplesPerChunk(0),
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mSamplesPerSecond(0),
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mChannels(0),
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mSampleFormat(0) {
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DDLINKCHILD("source", aSource);
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Reset();
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}
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bool WAVTrackDemuxer::Init() {
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Reset();
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FastSeek(TimeUnit());
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if (!mInfo) {
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mInfo = MakeUnique<AudioInfo>();
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}
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if (!RIFFParserInit()) {
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return false;
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}
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while (true) {
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if (!HeaderParserInit()) {
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return false;
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}
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uint32_t aChunkName = mHeaderParser.GiveHeader().ChunkName();
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uint32_t aChunkSize = mHeaderParser.GiveHeader().ChunkSize();
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if (aChunkName == FRMT_CODE) {
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if (!FmtChunkParserInit()) {
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return false;
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}
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} else if (aChunkName == LIST_CODE) {
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mHeaderParser.Reset();
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uint64_t endOfListChunk = static_cast<uint64_t>(mOffset) + aChunkSize;
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if (endOfListChunk > UINT32_MAX) {
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return false;
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}
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if (!ListChunkParserInit(aChunkSize)) {
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mOffset = endOfListChunk;
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}
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} else if (aChunkName == DATA_CODE) {
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mDataLength = aChunkSize;
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if (mFirstChunkOffset != mOffset) {
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mFirstChunkOffset = mOffset;
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}
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break;
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} else {
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mOffset += aChunkSize; // Skip other irrelevant chunks.
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}
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if (mOffset & 1) {
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// Wave files are 2-byte aligned so we need to round up
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mOffset += 1;
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}
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mHeaderParser.Reset();
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}
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if (mDataLength > StreamLength() - mFirstChunkOffset) {
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mDataLength = StreamLength() - mFirstChunkOffset;
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}
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mSamplesPerSecond = mFmtParser.FmtChunk().SampleRate();
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mChannels = mFmtParser.FmtChunk().Channels();
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mSampleFormat = mFmtParser.FmtChunk().SampleFormat();
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if (!mSamplesPerSecond || !mChannels || !mSampleFormat) {
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return false;
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}
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mSamplesPerChunk = DATA_CHUNK_SIZE * 8 / mChannels / mSampleFormat;
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mInfo->mRate = mSamplesPerSecond;
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mInfo->mChannels = mChannels;
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mInfo->mBitDepth = mSampleFormat;
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mInfo->mProfile = mFmtParser.FmtChunk().WaveFormat() & 0x00FF;
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mInfo->mExtendedProfile = (mFmtParser.FmtChunk().WaveFormat() & 0xFF00) >> 8;
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mInfo->mMimeType = "audio/wave; codecs=";
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mInfo->mMimeType.AppendInt(mFmtParser.FmtChunk().WaveFormat());
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mInfo->mDuration = Duration();
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return mInfo->mDuration.IsPositive();
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}
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bool WAVTrackDemuxer::RIFFParserInit() {
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RefPtr<MediaRawData> riffHeader = GetFileHeader(FindRIFFHeader());
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if (!riffHeader) {
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return false;
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}
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BufferReader RIFFReader(riffHeader->Data(), 12);
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Unused << mRIFFParser.Parse(RIFFReader);
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return mRIFFParser.RiffHeader().IsValid(11);
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}
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bool WAVTrackDemuxer::HeaderParserInit() {
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RefPtr<MediaRawData> header = GetFileHeader(FindChunkHeader());
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if (!header) {
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return false;
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}
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BufferReader HeaderReader(header->Data(), 8);
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Unused << mHeaderParser.Parse(HeaderReader);
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return true;
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}
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bool WAVTrackDemuxer::FmtChunkParserInit() {
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RefPtr<MediaRawData> fmtChunk = GetFileHeader(FindFmtChunk());
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if (!fmtChunk) {
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return false;
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}
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BufferReader fmtReader(fmtChunk->Data(),
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mHeaderParser.GiveHeader().ChunkSize());
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Unused << mFmtParser.Parse(fmtReader);
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return true;
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}
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bool WAVTrackDemuxer::ListChunkParserInit(uint32_t aChunkSize) {
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uint32_t bytesRead = 0;
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RefPtr<MediaRawData> infoTag = GetFileHeader(FindInfoTag());
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if (!infoTag) {
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return false;
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}
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BufferReader infoTagReader(infoTag->Data(), 4);
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auto res = infoTagReader.ReadU32();
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if (res.isErr() || (res.isOk() && res.unwrap() != INFO_CODE)) {
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return false;
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}
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bytesRead += 4;
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while (bytesRead < aChunkSize) {
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if (!HeaderParserInit()) {
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return false;
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}
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bytesRead += 8;
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uint32_t id = mHeaderParser.GiveHeader().ChunkName();
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uint32_t length = mHeaderParser.GiveHeader().ChunkSize();
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// SubChunk Length Cannot Exceed List Chunk length.
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if (length > aChunkSize - bytesRead) {
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length = aChunkSize - bytesRead;
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}
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MediaByteRange mRange = {mOffset, mOffset + length};
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RefPtr<MediaRawData> mChunkData = GetFileHeader(mRange);
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if (!mChunkData) {
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return false;
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}
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const char* rawData = reinterpret_cast<const char*>(mChunkData->Data());
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nsCString val(rawData, length);
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if (length > 0 && val[length - 1] == '\0') {
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val.SetLength(length - 1);
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}
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if (length % 2) {
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mOffset += 1;
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length += length % 2;
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}
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bytesRead += length;
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if (!IsUTF8(val)) {
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mHeaderParser.Reset();
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continue;
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}
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switch (id) {
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case 0x49415254: // IART
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mInfo->mTags.AppendElement(
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MetadataTag(NS_LITERAL_CSTRING("artist"), val));
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break;
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case 0x49434d54: // ICMT
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mInfo->mTags.AppendElement(
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MetadataTag(NS_LITERAL_CSTRING("comments"), val));
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break;
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case 0x49474e52: // IGNR
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mInfo->mTags.AppendElement(
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MetadataTag(NS_LITERAL_CSTRING("genre"), val));
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break;
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case 0x494e414d: // INAM
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mInfo->mTags.AppendElement(
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MetadataTag(NS_LITERAL_CSTRING("name"), val));
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break;
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}
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mHeaderParser.Reset();
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}
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return true;
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}
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media::TimeUnit WAVTrackDemuxer::SeekPosition() const {
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TimeUnit pos = Duration(mChunkIndex);
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if (Duration() > TimeUnit()) {
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pos = std::min(Duration(), pos);
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}
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return pos;
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}
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RefPtr<MediaRawData> WAVTrackDemuxer::DemuxSample() {
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return GetNextChunk(FindNextChunk());
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}
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UniquePtr<TrackInfo> WAVTrackDemuxer::GetInfo() const { return mInfo->Clone(); }
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RefPtr<WAVTrackDemuxer::SeekPromise> WAVTrackDemuxer::Seek(
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const TimeUnit& aTime) {
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FastSeek(aTime);
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const TimeUnit seekTime = ScanUntil(aTime);
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return SeekPromise::CreateAndResolve(seekTime, __func__);
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}
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TimeUnit WAVTrackDemuxer::FastSeek(const TimeUnit& aTime) {
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if (aTime.ToMicroseconds()) {
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mChunkIndex = ChunkIndexFromTime(aTime);
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} else {
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mChunkIndex = 0;
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}
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mOffset = OffsetFromChunkIndex(mChunkIndex);
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if (mOffset > mFirstChunkOffset && StreamLength() > 0) {
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mOffset = std::min(StreamLength() - 1, mOffset);
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}
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return Duration(mChunkIndex);
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}
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TimeUnit WAVTrackDemuxer::ScanUntil(const TimeUnit& aTime) {
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if (!aTime.ToMicroseconds()) {
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return FastSeek(aTime);
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}
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if (Duration(mChunkIndex) > aTime) {
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FastSeek(aTime);
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}
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return SeekPosition();
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}
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RefPtr<WAVTrackDemuxer::SamplesPromise> WAVTrackDemuxer::GetSamples(
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int32_t aNumSamples) {
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MOZ_ASSERT(aNumSamples);
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RefPtr<SamplesHolder> datachunks = new SamplesHolder();
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while (aNumSamples--) {
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RefPtr<MediaRawData> datachunk = GetNextChunk(FindNextChunk());
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if (!datachunk) {
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break;
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}
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datachunks->mSamples.AppendElement(datachunk);
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}
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if (datachunks->mSamples.IsEmpty()) {
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return SamplesPromise::CreateAndReject(NS_ERROR_DOM_MEDIA_END_OF_STREAM,
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__func__);
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}
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return SamplesPromise::CreateAndResolve(datachunks, __func__);
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}
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void WAVTrackDemuxer::Reset() {
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FastSeek(TimeUnit());
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mParser.Reset();
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mHeaderParser.Reset();
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mRIFFParser.Reset();
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mFmtParser.Reset();
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}
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RefPtr<WAVTrackDemuxer::SkipAccessPointPromise>
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WAVTrackDemuxer::SkipToNextRandomAccessPoint(const TimeUnit& aTimeThreshold) {
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return SkipAccessPointPromise::CreateAndReject(
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SkipFailureHolder(NS_ERROR_DOM_MEDIA_DEMUXER_ERR, 0), __func__);
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}
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int64_t WAVTrackDemuxer::GetResourceOffset() const { return mOffset; }
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TimeIntervals WAVTrackDemuxer::GetBuffered() {
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TimeUnit duration = Duration();
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if (duration <= TimeUnit()) {
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return TimeIntervals();
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}
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AutoPinned<MediaResource> stream(mSource.GetResource());
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return GetEstimatedBufferedTimeRanges(stream, duration.ToMicroseconds());
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}
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int64_t WAVTrackDemuxer::StreamLength() const { return mSource.GetLength(); }
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TimeUnit WAVTrackDemuxer::Duration() const {
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if (!mDataLength || !mChannels || !mSampleFormat) {
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return TimeUnit();
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}
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int64_t numSamples =
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static_cast<int64_t>(mDataLength) * 8 / mChannels / mSampleFormat;
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int64_t numUSeconds = USECS_PER_S * numSamples / mSamplesPerSecond;
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if (USECS_PER_S * numSamples % mSamplesPerSecond > mSamplesPerSecond / 2) {
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numUSeconds++;
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}
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return TimeUnit::FromMicroseconds(numUSeconds);
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}
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TimeUnit WAVTrackDemuxer::Duration(int64_t aNumDataChunks) const {
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if (!mSamplesPerSecond || !mSamplesPerChunk) {
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return TimeUnit();
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}
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const double usPerDataChunk =
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USECS_PER_S * static_cast<double>(mSamplesPerChunk) / mSamplesPerSecond;
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return TimeUnit::FromMicroseconds(aNumDataChunks * usPerDataChunk);
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}
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TimeUnit WAVTrackDemuxer::DurationFromBytes(uint32_t aNumBytes) const {
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if (!mSamplesPerSecond || !mChannels || !mSampleFormat) {
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return TimeUnit();
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}
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int64_t numSamples = aNumBytes * 8 / mChannels / mSampleFormat;
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int64_t numUSeconds = USECS_PER_S * numSamples / mSamplesPerSecond;
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if (USECS_PER_S * numSamples % mSamplesPerSecond > mSamplesPerSecond / 2) {
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numUSeconds++;
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}
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return TimeUnit::FromMicroseconds(numUSeconds);
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}
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MediaByteRange WAVTrackDemuxer::FindNextChunk() {
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if (mOffset + DATA_CHUNK_SIZE < mFirstChunkOffset + mDataLength) {
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return {mOffset, mOffset + DATA_CHUNK_SIZE};
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} else {
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return {mOffset, mFirstChunkOffset + mDataLength};
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}
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}
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MediaByteRange WAVTrackDemuxer::FindChunkHeader() {
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return {mOffset, mOffset + CHUNK_HEAD_SIZE};
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}
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MediaByteRange WAVTrackDemuxer::FindRIFFHeader() {
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return {mOffset, mOffset + RIFF_CHUNK_SIZE};
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}
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MediaByteRange WAVTrackDemuxer::FindFmtChunk() {
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return {mOffset, mOffset + mHeaderParser.GiveHeader().ChunkSize()};
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}
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MediaByteRange WAVTrackDemuxer::FindListChunk() {
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return {mOffset, mOffset + mHeaderParser.GiveHeader().ChunkSize()};
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}
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MediaByteRange WAVTrackDemuxer::FindInfoTag() { return {mOffset, mOffset + 4}; }
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bool WAVTrackDemuxer::SkipNextChunk(const MediaByteRange& aRange) {
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UpdateState(aRange);
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return true;
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}
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already_AddRefed<MediaRawData> WAVTrackDemuxer::GetNextChunk(
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const MediaByteRange& aRange) {
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if (!aRange.Length()) {
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return nullptr;
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}
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RefPtr<MediaRawData> datachunk = new MediaRawData();
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datachunk->mOffset = aRange.mStart;
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UniquePtr<MediaRawDataWriter> chunkWriter(datachunk->CreateWriter());
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if (!chunkWriter->SetSize(aRange.Length())) {
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return nullptr;
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}
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const uint32_t read =
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Read(chunkWriter->Data(), datachunk->mOffset, datachunk->Size());
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if (read != aRange.Length()) {
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return nullptr;
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}
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UpdateState(aRange);
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++mNumParsedChunks;
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++mChunkIndex;
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datachunk->mTime = Duration(mChunkIndex - 1);
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if (static_cast<uint32_t>(mChunkIndex) * DATA_CHUNK_SIZE < mDataLength) {
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datachunk->mDuration = Duration(1);
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} else {
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uint32_t mBytesRemaining = mDataLength - mChunkIndex * DATA_CHUNK_SIZE;
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datachunk->mDuration = DurationFromBytes(mBytesRemaining);
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}
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datachunk->mTimecode = datachunk->mTime;
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datachunk->mKeyframe = true;
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MOZ_ASSERT(!datachunk->mTime.IsNegative());
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MOZ_ASSERT(!datachunk->mDuration.IsNegative());
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return datachunk.forget();
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}
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already_AddRefed<MediaRawData> WAVTrackDemuxer::GetFileHeader(
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const MediaByteRange& aRange) {
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if (!aRange.Length()) {
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return nullptr;
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}
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RefPtr<MediaRawData> fileHeader = new MediaRawData();
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fileHeader->mOffset = aRange.mStart;
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UniquePtr<MediaRawDataWriter> headerWriter(fileHeader->CreateWriter());
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if (!headerWriter->SetSize(aRange.Length())) {
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return nullptr;
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}
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const uint32_t read =
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Read(headerWriter->Data(), fileHeader->mOffset, fileHeader->Size());
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if (read != aRange.Length()) {
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return nullptr;
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}
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UpdateState(aRange);
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return fileHeader.forget();
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}
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int64_t WAVTrackDemuxer::OffsetFromChunkIndex(int64_t aChunkIndex) const {
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return mFirstChunkOffset + aChunkIndex * DATA_CHUNK_SIZE;
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}
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int64_t WAVTrackDemuxer::ChunkIndexFromOffset(int64_t aOffset) const {
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int64_t chunkIndex = (aOffset - mFirstChunkOffset) / DATA_CHUNK_SIZE;
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return std::max<int64_t>(0, chunkIndex);
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}
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int64_t WAVTrackDemuxer::ChunkIndexFromTime(
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const media::TimeUnit& aTime) const {
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if (!mSamplesPerChunk || !mSamplesPerSecond) {
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return 0;
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}
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int64_t chunkIndex =
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(aTime.ToSeconds() * mSamplesPerSecond / mSamplesPerChunk) - 1;
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return chunkIndex;
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}
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void WAVTrackDemuxer::UpdateState(const MediaByteRange& aRange) {
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// Full chunk parsed, move offset to its end.
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mOffset = aRange.mEnd;
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mTotalChunkLen += aRange.Length();
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}
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int32_t WAVTrackDemuxer::Read(uint8_t* aBuffer, int64_t aOffset,
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int32_t aSize) {
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const int64_t streamLen = StreamLength();
|
|
if (mInfo && streamLen > 0) {
|
|
aSize = std::min<int64_t>(aSize, streamLen - aOffset);
|
|
}
|
|
uint32_t read = 0;
|
|
const nsresult rv = mSource.ReadAt(aOffset, reinterpret_cast<char*>(aBuffer),
|
|
static_cast<uint32_t>(aSize), &read);
|
|
NS_ENSURE_SUCCESS(rv, 0);
|
|
return static_cast<int32_t>(read);
|
|
}
|
|
|
|
// RIFFParser
|
|
|
|
Result<uint32_t, nsresult> RIFFParser::Parse(BufferReader& aReader) {
|
|
for (auto res = aReader.ReadU8();
|
|
res.isOk() && !mRiffHeader.ParseNext(res.unwrap());
|
|
res = aReader.ReadU8()) {
|
|
}
|
|
|
|
if (mRiffHeader.IsValid()) {
|
|
return RIFF_CHUNK_SIZE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void RIFFParser::Reset() { mRiffHeader.Reset(); }
|
|
|
|
const RIFFParser::RIFFHeader& RIFFParser::RiffHeader() const {
|
|
return mRiffHeader;
|
|
}
|
|
|
|
// RIFFParser::RIFFHeader
|
|
|
|
RIFFParser::RIFFHeader::RIFFHeader() { Reset(); }
|
|
|
|
void RIFFParser::RIFFHeader::Reset() {
|
|
memset(mRaw, 0, sizeof(mRaw));
|
|
mPos = 0;
|
|
}
|
|
|
|
bool RIFFParser::RIFFHeader::ParseNext(uint8_t c) {
|
|
if (!Update(c)) {
|
|
Reset();
|
|
if (!Update(c)) {
|
|
Reset();
|
|
}
|
|
}
|
|
return IsValid();
|
|
}
|
|
|
|
bool RIFFParser::RIFFHeader::IsValid(int aPos) const {
|
|
if (aPos > -1 && aPos < 4) {
|
|
return RIFF[aPos] == mRaw[aPos];
|
|
} else if (aPos > 7 && aPos < 12) {
|
|
return WAVE[aPos - 8] == mRaw[aPos];
|
|
} else {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
bool RIFFParser::RIFFHeader::IsValid() const { return mPos >= RIFF_CHUNK_SIZE; }
|
|
|
|
bool RIFFParser::RIFFHeader::Update(uint8_t c) {
|
|
if (mPos < RIFF_CHUNK_SIZE) {
|
|
mRaw[mPos] = c;
|
|
}
|
|
return IsValid(mPos++);
|
|
}
|
|
|
|
// HeaderParser
|
|
|
|
Result<uint32_t, nsresult> HeaderParser::Parse(BufferReader& aReader) {
|
|
for (auto res = aReader.ReadU8();
|
|
res.isOk() && !mHeader.ParseNext(res.unwrap()); res = aReader.ReadU8()) {
|
|
}
|
|
|
|
if (mHeader.IsValid()) {
|
|
return CHUNK_HEAD_SIZE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void HeaderParser::Reset() { mHeader.Reset(); }
|
|
|
|
const HeaderParser::ChunkHeader& HeaderParser::GiveHeader() const {
|
|
return mHeader;
|
|
}
|
|
|
|
// HeaderParser::ChunkHeader
|
|
|
|
HeaderParser::ChunkHeader::ChunkHeader() { Reset(); }
|
|
|
|
void HeaderParser::ChunkHeader::Reset() {
|
|
memset(mRaw, 0, sizeof(mRaw));
|
|
mPos = 0;
|
|
}
|
|
|
|
bool HeaderParser::ChunkHeader::ParseNext(uint8_t c) {
|
|
Update(c);
|
|
return IsValid();
|
|
}
|
|
|
|
bool HeaderParser::ChunkHeader::IsValid() const {
|
|
return mPos >= CHUNK_HEAD_SIZE;
|
|
}
|
|
|
|
uint32_t HeaderParser::ChunkHeader::ChunkName() const {
|
|
return ((mRaw[0] << 24) | (mRaw[1] << 16) | (mRaw[2] << 8) | (mRaw[3]));
|
|
}
|
|
|
|
uint32_t HeaderParser::ChunkHeader::ChunkSize() const {
|
|
return ((mRaw[7] << 24) | (mRaw[6] << 16) | (mRaw[5] << 8) | (mRaw[4]));
|
|
}
|
|
|
|
void HeaderParser::ChunkHeader::Update(uint8_t c) {
|
|
if (mPos < CHUNK_HEAD_SIZE) {
|
|
mRaw[mPos++] = c;
|
|
}
|
|
}
|
|
|
|
// FormatParser
|
|
|
|
Result<uint32_t, nsresult> FormatParser::Parse(BufferReader& aReader) {
|
|
for (auto res = aReader.ReadU8();
|
|
res.isOk() && !mFmtChunk.ParseNext(res.unwrap());
|
|
res = aReader.ReadU8()) {
|
|
}
|
|
|
|
if (mFmtChunk.IsValid()) {
|
|
return FMT_CHUNK_MIN_SIZE;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void FormatParser::Reset() { mFmtChunk.Reset(); }
|
|
|
|
const FormatParser::FormatChunk& FormatParser::FmtChunk() const {
|
|
return mFmtChunk;
|
|
}
|
|
|
|
// FormatParser::FormatChunk
|
|
|
|
FormatParser::FormatChunk::FormatChunk() { Reset(); }
|
|
|
|
void FormatParser::FormatChunk::Reset() {
|
|
memset(mRaw, 0, sizeof(mRaw));
|
|
mPos = 0;
|
|
}
|
|
|
|
uint16_t FormatParser::FormatChunk::WaveFormat() const {
|
|
return (mRaw[1] << 8) | (mRaw[0]);
|
|
}
|
|
|
|
uint16_t FormatParser::FormatChunk::Channels() const {
|
|
return (mRaw[3] << 8) | (mRaw[2]);
|
|
}
|
|
|
|
uint32_t FormatParser::FormatChunk::SampleRate() const {
|
|
return (mRaw[7] << 24) | (mRaw[6] << 16) | (mRaw[5] << 8) | (mRaw[4]);
|
|
}
|
|
|
|
uint16_t FormatParser::FormatChunk::FrameSize() const {
|
|
return (mRaw[13] << 8) | (mRaw[12]);
|
|
}
|
|
|
|
uint16_t FormatParser::FormatChunk::SampleFormat() const {
|
|
return (mRaw[15] << 8) | (mRaw[14]);
|
|
}
|
|
|
|
bool FormatParser::FormatChunk::ParseNext(uint8_t c) {
|
|
Update(c);
|
|
return IsValid();
|
|
}
|
|
|
|
bool FormatParser::FormatChunk::IsValid() const {
|
|
return (FrameSize() == SampleRate() * Channels() / 8) &&
|
|
(mPos >= FMT_CHUNK_MIN_SIZE);
|
|
}
|
|
|
|
void FormatParser::FormatChunk::Update(uint8_t c) {
|
|
if (mPos < FMT_CHUNK_MIN_SIZE) {
|
|
mRaw[mPos++] = c;
|
|
}
|
|
}
|
|
|
|
// DataParser
|
|
|
|
DataParser::DataParser() {}
|
|
|
|
void DataParser::Reset() { mChunk.Reset(); }
|
|
|
|
const DataParser::DataChunk& DataParser::CurrentChunk() const { return mChunk; }
|
|
|
|
// DataParser::DataChunk
|
|
|
|
void DataParser::DataChunk::Reset() { mPos = 0; }
|
|
|
|
} // namespace mozilla
|