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firefox/dom/media/platforms/apple/AppleATDecoder.cpp
Daniel Baumann 5e9a113729
Adding upstream version 140.0. 
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
2025-06-25 09:37:52 +02:00

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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 "AppleATDecoder.h"
#include "Adts.h"
#include "AppleUtils.h"
#include "MP4Decoder.h"
#include "MediaInfo.h"
#include "VideoUtils.h"
#include "mozilla/Logging.h"
#include "mozilla/SyncRunnable.h"
#include "mozilla/UniquePtr.h"
#include "nsTArray.h"
#include "ADTSDemuxer.h"
#include <array>
#define LOG(...) DDMOZ_LOG(sPDMLog, mozilla::LogLevel::Debug, __VA_ARGS__)
#define LOGEX(_this, ...) \
DDMOZ_LOGEX(_this, sPDMLog, mozilla::LogLevel::Debug, __VA_ARGS__)
#define FourCC2Str(n) \
((char[5]){(char)(n >> 24), (char)(n >> 16), (char)(n >> 8), (char)(n), 0})
namespace mozilla {
AppleATDecoder::AppleATDecoder(const AudioInfo& aConfig)
: mConfig(aConfig),
mFileStreamError(false),
mConverter(nullptr),
mOutputFormat(),
mStream(nullptr),
mParsedFramesForAACMagicCookie(0),
mErrored(false) {
MOZ_COUNT_CTOR(AppleATDecoder);
LOG("Creating Apple AudioToolbox decoder");
LOG("Audio Decoder configuration: %s %d Hz %d channels %d bits per channel",
mConfig.mMimeType.get(), mConfig.mRate, mConfig.mChannels,
mConfig.mBitDepth);
if (mConfig.mMimeType.EqualsLiteral("audio/mpeg")) {
mFormatID = kAudioFormatMPEGLayer3;
} else if (mConfig.mMimeType.EqualsLiteral("audio/mp4a-latm")) {
mFormatID = kAudioFormatMPEG4AAC;
if (aConfig.mCodecSpecificConfig.is<AacCodecSpecificData>()) {
const AacCodecSpecificData& aacCodecSpecificData =
aConfig.mCodecSpecificConfig.as<AacCodecSpecificData>();
mEncoderDelay = aacCodecSpecificData.mEncoderDelayFrames;
mTotalMediaFrames = aacCodecSpecificData.mMediaFrameCount;
LOG("AppleATDecoder (aac), found encoder delay (%" PRIu32
") and total frame count (%" PRIu64 ") in codec-specific side data",
mEncoderDelay, mTotalMediaFrames);
}
} else {
mFormatID = 0;
}
}
AppleATDecoder::~AppleATDecoder() {
MOZ_COUNT_DTOR(AppleATDecoder);
MOZ_ASSERT(!mConverter);
}
RefPtr<MediaDataDecoder::InitPromise> AppleATDecoder::Init() {
if (!mFormatID) {
LOG("AppleATDecoder::Init failure: unknown format ID");
return InitPromise::CreateAndReject(
MediaResult(NS_ERROR_DOM_MEDIA_FATAL_ERR,
RESULT_DETAIL("Non recognised format")),
__func__);
}
mThread = GetCurrentSerialEventTarget();
return InitPromise::CreateAndResolve(TrackType::kAudioTrack, __func__);
}
RefPtr<MediaDataDecoder::FlushPromise> AppleATDecoder::Flush() {
MOZ_ASSERT(mThread->IsOnCurrentThread());
LOG("Flushing AudioToolbox AAC decoder");
mQueuedSamples.Clear();
mDecodedSamples.Clear();
if (mConverter) {
OSStatus rv = AudioConverterReset(mConverter);
if (rv) {
LOG("Error %d resetting AudioConverter", static_cast<int>(rv));
}
}
if (mErrored) {
LOG("Flush error");
mParsedFramesForAACMagicCookie = 0;
mMagicCookie.Clear();
ProcessShutdown();
mErrored = false;
}
return FlushPromise::CreateAndResolve(true, __func__);
}
RefPtr<MediaDataDecoder::DecodePromise> AppleATDecoder::Drain() {
MOZ_ASSERT(mThread->IsOnCurrentThread());
LOG("Draining AudioToolbox AAC decoder");
return DecodePromise::CreateAndResolve(DecodedData(), __func__);
}
RefPtr<ShutdownPromise> AppleATDecoder::Shutdown() {
// mThread may not be set if Init hasn't been called first.
MOZ_ASSERT(!mThread || mThread->IsOnCurrentThread());
ProcessShutdown();
return ShutdownPromise::CreateAndResolve(true, __func__);
}
void AppleATDecoder::ProcessShutdown() {
// mThread may not be set if Init hasn't been called first.
MOZ_ASSERT(!mThread || mThread->IsOnCurrentThread());
if (mStream) {
OSStatus rv = AudioFileStreamClose(mStream);
if (rv) {
LOG("error %d disposing of AudioFileStream", static_cast<int>(rv));
return;
}
mStream = nullptr;
}
if (mConverter) {
LOG("Shutdown: Apple AudioToolbox AAC decoder");
OSStatus rv = AudioConverterDispose(mConverter);
if (rv) {
LOG("error %d disposing of AudioConverter", static_cast<int>(rv));
}
mConverter = nullptr;
}
}
nsCString AppleATDecoder::GetCodecName() const {
switch (mFormatID) {
case kAudioFormatMPEGLayer3:
return "mp3"_ns;
case kAudioFormatMPEG4AAC:
return "aac"_ns;
default:
return "unknown"_ns;
}
}
struct PassthroughUserData {
UInt32 mChannels;
UInt32 mDataSize;
const void* mData;
AudioStreamPacketDescription mPacket;
};
// Error value we pass through the decoder to signal that nothing
// has gone wrong during decoding and we're done processing the packet.
const uint32_t kNoMoreDataErr = 'MOAR';
static OSStatus _PassthroughInputDataCallback(
AudioConverterRef aAudioConverter, UInt32* aNumDataPackets /* in/out */,
AudioBufferList* aData /* in/out */,
AudioStreamPacketDescription** aPacketDesc, void* aUserData) {
PassthroughUserData* userData = (PassthroughUserData*)aUserData;
if (!userData->mDataSize) {
*aNumDataPackets = 0;
return kNoMoreDataErr;
}
if (aPacketDesc) {
userData->mPacket.mStartOffset = 0;
userData->mPacket.mVariableFramesInPacket = 0;
userData->mPacket.mDataByteSize = userData->mDataSize;
*aPacketDesc = &userData->mPacket;
}
aData->mBuffers[0].mNumberChannels = userData->mChannels;
aData->mBuffers[0].mDataByteSize = userData->mDataSize;
aData->mBuffers[0].mData = const_cast<void*>(userData->mData);
// No more data to provide following this run.
userData->mDataSize = 0;
return noErr;
}
RefPtr<MediaDataDecoder::DecodePromise> AppleATDecoder::Decode(
MediaRawData* aSample) {
MOZ_ASSERT(mThread->IsOnCurrentThread());
LOG("mp4 input sample pts=%s duration=%s %s %llu bytes audio",
aSample->mTime.ToString().get(), aSample->GetEndTime().ToString().get(),
aSample->mKeyframe ? " keyframe" : "",
(unsigned long long)aSample->Size());
MediaResult rv = NS_OK;
if (!mConverter) {
LOG("Lazily initing the decoder");
rv = SetupDecoder(aSample);
if (rv != NS_OK && rv != NS_ERROR_NOT_INITIALIZED) {
LOG("Decoder not initialized");
return DecodePromise::CreateAndReject(rv, __func__);
}
}
if (mIsADTS) {
bool rv = ADTS::StripHeader(aSample);
if (!rv) {
LOG("Stripping the ADTS header in AppleATDecoder failed");
}
}
mQueuedSamples.AppendElement(aSample);
if (rv == NS_OK) {
for (size_t i = 0; i < mQueuedSamples.Length(); i++) {
rv = DecodeSample(mQueuedSamples[i]);
if (NS_FAILED(rv)) {
LOG("Decoding error");
mErrored = true;
return DecodePromise::CreateAndReject(rv, __func__);
}
}
mQueuedSamples.Clear();
}
DecodedData results = std::move(mDecodedSamples);
mDecodedSamples = DecodedData();
return DecodePromise::CreateAndResolve(std::move(results), __func__);
}
MediaResult AppleATDecoder::DecodeSample(MediaRawData* aSample) {
MOZ_ASSERT(mThread->IsOnCurrentThread());
// Array containing the queued decoded audio frames, about to be output.
nsTArray<AudioDataValue> outputData;
UInt32 channels = mOutputFormat.mChannelsPerFrame;
// Pick a multiple of the frame size close to a power of two
// for efficient allocation. We're mainly using this decoder to decode AAC,
// that has packets of 1024 audio frames.
const uint32_t MAX_AUDIO_FRAMES = 1024;
const uint32_t maxDecodedSamples = MAX_AUDIO_FRAMES * channels;
// Descriptions for _decompressed_ audio packets. ignored.
auto packets = MakeUnique<AudioStreamPacketDescription[]>(MAX_AUDIO_FRAMES);
// This API insists on having packets spoon-fed to it from a callback.
// This structure exists only to pass our state.
PassthroughUserData userData = {channels, (UInt32)aSample->Size(),
aSample->Data()};
// Decompressed audio buffer
AlignedAudioBuffer decoded(maxDecodedSamples);
if (!decoded) {
return NS_ERROR_OUT_OF_MEMORY;
}
do {
AudioBufferList decBuffer;
decBuffer.mNumberBuffers = 1;
decBuffer.mBuffers[0].mNumberChannels = channels;
decBuffer.mBuffers[0].mDataByteSize =
maxDecodedSamples * sizeof(AudioDataValue);
decBuffer.mBuffers[0].mData = decoded.get();
// in: the max number of packets we can handle from the decoder.
// out: the number of packets the decoder is actually returning.
UInt32 numFrames = MAX_AUDIO_FRAMES;
OSStatus rv = AudioConverterFillComplexBuffer(
mConverter, _PassthroughInputDataCallback, &userData,
&numFrames /* in/out */, &decBuffer, packets.get());
if (rv && rv != kNoMoreDataErr) {
LOG("Error decoding audio sample: %d\n", static_cast<int>(rv));
return MediaResult(
NS_ERROR_DOM_MEDIA_DECODE_ERR,
RESULT_DETAIL("Error decoding audio sample: %d @ %s",
static_cast<int>(rv), aSample->mTime.ToString().get()));
}
if (numFrames) {
AudioDataValue* outputFrames = decoded.get();
outputData.AppendElements(outputFrames, numFrames * channels);
}
if (rv == kNoMoreDataErr) {
break;
}
} while (true);
if (outputData.IsEmpty()) {
return NS_OK;
}
size_t numFrames = outputData.Length() / channels;
int rate = AssertedCast<int>(mOutputFormat.mSampleRate);
media::TimeUnit duration(numFrames, rate);
if (!duration.IsValid()) {
NS_WARNING("Invalid count of accumulated audio samples");
return MediaResult(
NS_ERROR_DOM_MEDIA_OVERFLOW_ERR,
RESULT_DETAIL(
"Invalid count of accumulated audio samples: num:%llu rate:%d",
uint64_t(numFrames), rate));
}
LOG("Decoded audio packet [%s, %s] (duration: %s)\n",
aSample->mTime.ToString().get(), aSample->GetEndTime().ToString().get(),
duration.ToString().get());
AudioSampleBuffer data(outputData.Elements(), outputData.Length());
if (!data.Data()) {
return NS_ERROR_OUT_OF_MEMORY;
}
if (mChannelLayout && !mAudioConverter) {
AudioConfig in(*mChannelLayout, channels, rate);
AudioConfig out(AudioConfig::ChannelLayout::SMPTEDefault(*mChannelLayout),
channels, rate);
mAudioConverter = MakeUnique<AudioConverter>(in, out);
}
if (mAudioConverter && mChannelLayout && mChannelLayout->IsValid()) {
MOZ_ASSERT(mAudioConverter->CanWorkInPlace());
data = mAudioConverter->Process(std::move(data));
}
RefPtr<AudioData> audio = new AudioData(
aSample->mOffset, aSample->mTime, data.Forget(), channels, rate,
mChannelLayout && mChannelLayout->IsValid()
? mChannelLayout->Map()
: AudioConfig::ChannelLayout::UNKNOWN_MAP);
MOZ_DIAGNOSTIC_ASSERT(duration == audio->mDuration, "must be equal");
mDecodedSamples.AppendElement(std::move(audio));
return NS_OK;
}
MediaResult AppleATDecoder::GetInputAudioDescription(
AudioStreamBasicDescription& aDesc, const nsTArray<uint8_t>& aExtraData) {
MOZ_ASSERT(mThread->IsOnCurrentThread());
// Request the properties from CoreAudio using the codec magic cookie
AudioFormatInfo formatInfo;
PodZero(&formatInfo.mASBD);
formatInfo.mASBD.mFormatID = mFormatID;
if (mFormatID == kAudioFormatMPEG4AAC) {
formatInfo.mASBD.mFormatFlags = mConfig.mExtendedProfile;
}
formatInfo.mMagicCookieSize = aExtraData.Length();
formatInfo.mMagicCookie = aExtraData.Elements();
UInt32 formatListSize;
// Attempt to retrieve the default format using
// kAudioFormatProperty_FormatInfo method.
// This method only retrieves the FramesPerPacket information required
// by the decoder, which depends on the codec type and profile.
aDesc.mFormatID = mFormatID;
aDesc.mChannelsPerFrame = mConfig.mChannels;
aDesc.mSampleRate = mConfig.mRate;
UInt32 inputFormatSize = sizeof(aDesc);
OSStatus rv = AudioFormatGetProperty(kAudioFormatProperty_FormatInfo, 0,
nullptr, &inputFormatSize, &aDesc);
if (NS_WARN_IF(rv)) {
return MediaResult(
NS_ERROR_FAILURE,
RESULT_DETAIL("Unable to get format info:%d", int32_t(rv)));
}
// If any of the methods below fail, we will return the default format as
// created using kAudioFormatProperty_FormatInfo above.
rv = AudioFormatGetPropertyInfo(kAudioFormatProperty_FormatList,
sizeof(formatInfo), &formatInfo,
&formatListSize);
if (rv || (formatListSize % sizeof(AudioFormatListItem))) {
return NS_OK;
}
size_t listCount = formatListSize / sizeof(AudioFormatListItem);
auto formatList = MakeUnique<AudioFormatListItem[]>(listCount);
rv = AudioFormatGetProperty(kAudioFormatProperty_FormatList,
sizeof(formatInfo), &formatInfo, &formatListSize,
formatList.get());
if (rv) {
return NS_OK;
}
LOG("found %zu available audio stream(s)",
formatListSize / sizeof(AudioFormatListItem));
// Get the index number of the first playable format.
// This index number will be for the highest quality layer the platform
// is capable of playing.
UInt32 itemIndex;
UInt32 indexSize = sizeof(itemIndex);
rv = AudioFormatGetProperty(kAudioFormatProperty_FirstPlayableFormatFromList,
formatListSize, formatList.get(), &indexSize,
&itemIndex);
if (rv) {
return NS_OK;
}
aDesc = formatList[itemIndex].mASBD;
return NS_OK;
}
AudioConfig::Channel ConvertChannelLabel(AudioChannelLabel id) {
switch (id) {
case kAudioChannelLabel_Left:
return AudioConfig::CHANNEL_FRONT_LEFT;
case kAudioChannelLabel_Right:
return AudioConfig::CHANNEL_FRONT_RIGHT;
case kAudioChannelLabel_Mono:
case kAudioChannelLabel_Center:
return AudioConfig::CHANNEL_FRONT_CENTER;
case kAudioChannelLabel_LFEScreen:
return AudioConfig::CHANNEL_LFE;
case kAudioChannelLabel_LeftSurround:
return AudioConfig::CHANNEL_SIDE_LEFT;
case kAudioChannelLabel_RightSurround:
return AudioConfig::CHANNEL_SIDE_RIGHT;
case kAudioChannelLabel_CenterSurround:
return AudioConfig::CHANNEL_BACK_CENTER;
case kAudioChannelLabel_RearSurroundLeft:
return AudioConfig::CHANNEL_BACK_LEFT;
case kAudioChannelLabel_RearSurroundRight:
return AudioConfig::CHANNEL_BACK_RIGHT;
default:
return AudioConfig::CHANNEL_INVALID;
}
}
// Will set mChannelLayout if a channel layout could properly be identified
// and is supported.
nsresult AppleATDecoder::SetupChannelLayout() {
MOZ_ASSERT(mThread->IsOnCurrentThread());
// Determine the channel layout.
UInt32 propertySize;
UInt32 size;
OSStatus status = AudioConverterGetPropertyInfo(
mConverter, kAudioConverterOutputChannelLayout, &propertySize, nullptr);
if (status || !propertySize) {
LOG("Couldn't get channel layout property (%s)", FourCC2Str(status));
return NS_ERROR_FAILURE;
}
auto data = MakeUnique<uint8_t[]>(propertySize);
size = propertySize;
status = AudioConverterGetProperty(
mConverter, kAudioConverterInputChannelLayout, &size, data.get());
if (status || size != propertySize) {
LOG("Couldn't get channel layout property (%s)", FourCC2Str(status));
return NS_ERROR_FAILURE;
}
AudioChannelLayout* layout =
reinterpret_cast<AudioChannelLayout*>(data.get());
AudioChannelLayoutTag tag = layout->mChannelLayoutTag;
// if tag is kAudioChannelLayoutTag_UseChannelDescriptions then the structure
// directly contains the the channel layout mapping.
// If tag is kAudioChannelLayoutTag_UseChannelBitmap then the layout will
// be defined via the bitmap and can be retrieved using
// kAudioFormatProperty_ChannelLayoutForBitmap property.
// Otherwise the tag itself describes the layout.
if (tag != kAudioChannelLayoutTag_UseChannelDescriptions) {
AudioFormatPropertyID property =
tag == kAudioChannelLayoutTag_UseChannelBitmap
? kAudioFormatProperty_ChannelLayoutForBitmap
: kAudioFormatProperty_ChannelLayoutForTag;
if (property == kAudioFormatProperty_ChannelLayoutForBitmap) {
status = AudioFormatGetPropertyInfo(
property, sizeof(UInt32), &layout->mChannelBitmap, &propertySize);
} else {
status = AudioFormatGetPropertyInfo(
property, sizeof(AudioChannelLayoutTag), &tag, &propertySize);
}
if (status || !propertySize) {
LOG("Couldn't get channel layout property info (%s:%s)",
FourCC2Str(property), FourCC2Str(status));
return NS_ERROR_FAILURE;
}
data = MakeUnique<uint8_t[]>(propertySize);
layout = reinterpret_cast<AudioChannelLayout*>(data.get());
size = propertySize;
if (property == kAudioFormatProperty_ChannelLayoutForBitmap) {
status = AudioFormatGetProperty(property, sizeof(UInt32),
&layout->mChannelBitmap, &size, layout);
} else {
status = AudioFormatGetProperty(property, sizeof(AudioChannelLayoutTag),
&tag, &size, layout);
}
if (status || size != propertySize) {
LOG("Couldn't get channel layout property (%s:%s)", FourCC2Str(property),
FourCC2Str(status));
return NS_ERROR_FAILURE;
}
// We have retrieved the channel layout from the tag or bitmap.
// We can now directly use the channel descriptions.
layout->mChannelLayoutTag = kAudioChannelLayoutTag_UseChannelDescriptions;
}
if (layout->mNumberChannelDescriptions != mOutputFormat.mChannelsPerFrame) {
LOG("Not matching the original channel number");
return NS_ERROR_FAILURE;
}
AutoTArray<AudioConfig::Channel, 8> channels;
channels.SetLength(layout->mNumberChannelDescriptions);
for (uint32_t i = 0; i < layout->mNumberChannelDescriptions; i++) {
AudioChannelLabel id = layout->mChannelDescriptions[i].mChannelLabel;
AudioConfig::Channel channel = ConvertChannelLabel(id);
channels[i] = channel;
}
mChannelLayout = MakeUnique<AudioConfig::ChannelLayout>(
mOutputFormat.mChannelsPerFrame, channels.Elements());
return NS_OK;
}
MediaResult AppleATDecoder::SetupDecoder(MediaRawData* aSample) {
MOZ_ASSERT(mThread->IsOnCurrentThread());
static const uint32_t MAX_FRAMES = 2;
bool isADTS =
ADTS::FrameHeader::MatchesSync(Span{aSample->Data(), aSample->Size()});
if (isADTS) {
ADTS::FrameParser parser;
if (!parser.Parse(0, aSample->Data(), aSample->Data() + aSample->Size())) {
LOG("ADTS frame parsing error");
return NS_ERROR_NOT_INITIALIZED;
}
AudioCodecSpecificBinaryBlob blob;
ADTS::InitAudioSpecificConfig(parser.FirstFrame(), blob.mBinaryBlob);
mConfig.mCodecSpecificConfig = AudioCodecSpecificVariant{std::move(blob)};
mConfig.mProfile = mConfig.mExtendedProfile =
parser.FirstFrame().Header().mObjectType;
mIsADTS = true;
}
if (mFormatID == kAudioFormatMPEG4AAC && mConfig.mExtendedProfile == 2 &&
mParsedFramesForAACMagicCookie < MAX_FRAMES) {
LOG("Attempting to get implicit AAC magic cookie");
// Check for implicit SBR signalling if stream is AAC-LC
// This will provide us with an updated magic cookie for use with
// GetInputAudioDescription.
if (NS_SUCCEEDED(GetImplicitAACMagicCookie(aSample)) &&
!mMagicCookie.Length() && !isADTS) {
// nothing found yet, will try again later
LOG("Getting implicit AAC magic cookie failed");
mParsedFramesForAACMagicCookie++;
LOG("Not initialized -- need magic cookie");
return NS_ERROR_NOT_INITIALIZED;
}
// An error occurred, fallback to using default stream description
}
LOG("Initializing Apple AudioToolbox decoder");
// Should we try and use magic cookie data from the AAC data? We do this if
// - We have an AAC config &
// - We do not aleady have magic cookie data.
// Otherwise we just use the existing cookie (which may be empty).
bool shouldUseAacMagicCookie =
mConfig.mCodecSpecificConfig.is<AacCodecSpecificData>() &&
mMagicCookie.IsEmpty();
nsTArray<uint8_t>& magicCookie =
shouldUseAacMagicCookie
? *mConfig.mCodecSpecificConfig.as<AacCodecSpecificData>()
.mEsDescriptorBinaryBlob
: mMagicCookie;
AudioStreamBasicDescription inputFormat;
PodZero(&inputFormat);
MediaResult rv = GetInputAudioDescription(inputFormat, magicCookie);
if (NS_FAILED(rv)) {
LOG("GetInputAudioDescription failure");
return rv;
}
// Fill in the output format manually.
PodZero(&mOutputFormat);
mOutputFormat.mFormatID = kAudioFormatLinearPCM;
mOutputFormat.mSampleRate = inputFormat.mSampleRate;
mOutputFormat.mChannelsPerFrame = inputFormat.mChannelsPerFrame;
mOutputFormat.mBitsPerChannel = 32;
mOutputFormat.mFormatFlags = kLinearPCMFormatFlagIsFloat | 0;
// Set up the decoder so it gives us one sample per frame
mOutputFormat.mFramesPerPacket = 1;
mOutputFormat.mBytesPerPacket = mOutputFormat.mBytesPerFrame =
mOutputFormat.mChannelsPerFrame * mOutputFormat.mBitsPerChannel / 8;
OSStatus status =
AudioConverterNew(&inputFormat, &mOutputFormat, &mConverter);
if (status) {
LOG("Error %d constructing AudioConverter", int(status));
mConverter = nullptr;
return MediaResult(
NS_ERROR_FAILURE,
RESULT_DETAIL("Error constructing AudioConverter:%d", int32_t(status)));
}
if (magicCookie.Length() && mFormatID == kAudioFormatMPEG4AAC) {
status = AudioConverterSetProperty(
mConverter, kAudioConverterDecompressionMagicCookie,
magicCookie.Length(), magicCookie.Elements());
if (status) {
LOG("Error setting AudioConverter AAC cookie:%d", int32_t(status));
ProcessShutdown();
return MediaResult(
NS_ERROR_FAILURE,
RESULT_DETAIL("Error setting AudioConverter AAC cookie:%d",
int32_t(status)));
}
}
if (NS_FAILED(SetupChannelLayout())) {
NS_WARNING("Couldn't retrieve channel layout, will use default layout");
}
return NS_OK;
}
static void _MetadataCallback(void* aAppleATDecoder, AudioFileStreamID aStream,
AudioFileStreamPropertyID aProperty,
UInt32* aFlags) {
AppleATDecoder* decoder = static_cast<AppleATDecoder*>(aAppleATDecoder);
MOZ_RELEASE_ASSERT(decoder->mThread->IsOnCurrentThread());
LOGEX(decoder, "MetadataCallback receiving: '%s'", FourCC2Str(aProperty));
if (aProperty == kAudioFileStreamProperty_MagicCookieData) {
UInt32 size;
Boolean writeable;
OSStatus rv =
AudioFileStreamGetPropertyInfo(aStream, aProperty, &size, &writeable);
if (rv) {
LOGEX(decoder, "Couldn't get property info for '%s' (%s)",
FourCC2Str(aProperty), FourCC2Str(rv));
decoder->mFileStreamError = true;
return;
}
auto data = MakeUnique<uint8_t[]>(size);
rv = AudioFileStreamGetProperty(aStream, aProperty, &size, data.get());
if (rv) {
LOGEX(decoder, "Couldn't get property '%s' (%s)", FourCC2Str(aProperty),
FourCC2Str(rv));
decoder->mFileStreamError = true;
return;
}
decoder->mMagicCookie.AppendElements(data.get(), size);
}
}
static void _SampleCallback(void* aSBR, UInt32 aNumBytes, UInt32 aNumPackets,
const void* aData,
AudioStreamPacketDescription* aPackets) {}
nsresult AppleATDecoder::GetImplicitAACMagicCookie(MediaRawData* aSample) {
MOZ_ASSERT(mThread->IsOnCurrentThread());
bool isADTS =
ADTS::FrameHeader::MatchesSync(Span{aSample->Data(), aSample->Size()});
RefPtr<MediaRawData> adtssample = aSample;
if (!isADTS) {
// Prepend ADTS header to AAC audio.
adtssample = aSample->Clone();
if (!adtssample) {
return NS_ERROR_OUT_OF_MEMORY;
}
auto frequency_index = ADTS::GetFrequencyIndex(mConfig.mRate);
if (frequency_index.isErr()) {
LOG("%d isn't a valid rate for AAC", mConfig.mRate);
return NS_ERROR_FAILURE;
}
// Arbitrarily pick main profile if not specified
int profile = mConfig.mProfile ? mConfig.mProfile : 1;
bool rv = ADTS::ConvertSample(mConfig.mChannels, frequency_index.unwrap(),
profile, adtssample);
if (!rv) {
LOG("Failed to apply ADTS header");
return NS_ERROR_FAILURE;
}
}
if (!mStream) {
OSStatus rv = AudioFileStreamOpen(this, _MetadataCallback, _SampleCallback,
kAudioFileAAC_ADTSType, &mStream);
if (rv) {
LOG("Couldn't open AudioFileStream");
return NS_ERROR_FAILURE;
}
}
OSStatus status = AudioFileStreamParseBytes(
mStream, adtssample->Size(), adtssample->Data(), 0 /* discontinuity */);
if (status) {
LOG("Couldn't parse sample");
}
if (status || mFileStreamError || mMagicCookie.Length()) {
// We have decoded a magic cookie or an error occurred as such
// we won't need the stream any longer.
AudioFileStreamClose(mStream);
mStream = nullptr;
}
return (mFileStreamError || status) ? NS_ERROR_FAILURE : NS_OK;
}
} // namespace mozilla
#undef LOG
#undef LOGEX
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