/* 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 <CoreAudioTypes/CoreAudioBaseTypes.h>
#include <mozilla/Result.h>
#include "ADTSDemuxer.h"
#include "Adts.h"
#include "ByteWriter.h"
#include "ErrorList.h"
#include "MP4Decoder.h"
#include "MediaInfo.h"
#include "MediaResult.h"
#include "mozilla/EndianUtils.h"
#include "mozilla/Logging.h"
#include "mozilla/Result.h"
#include "mozilla/UniquePtr.h"
#include "nsDebug.h"
#include "nsTArray.h"
#define LOG(...) \
MOZ_LOG_FMT(mozilla::sPDMLog, mozilla::LogLevel::Debug, __VA_ARGS__)
#define FourCC2Str(n) \
((
char[
5]){(
char)(n >>
24), (
char)(n >>
16), (
char)(n >>
8), (
char)(n),
0})
const int AUDIO_OBJECT_TYPE_USAC =
42;
const UInt32 kDynamicRangeControlProperty =
0x64726370;
// "drcp", not present in macOS headers
// Write ISO/IEC 14496-1 expandable size field (1-4 bytes) (8.3.3)
// Each byte encodes 7 bits of size with MSB as continuation flag
template <
typename T>
static bool WriteDescriptor(mozilla::ByteWriter<T>& writer, uint8_t tag,
uint32_t size) {
#define TRY(x) \
if (!(x)) { \
return false; \
}
TRY(writer.WriteU8(tag));
// Sizes are encoded as:
// 0xxxxxxx - sizes 0 to 127 (1 byte)
// 1xxxxxxx 0xxxxxxx - sizes 128 to 16383 (2 bytes)
// 1xxxxxxx 1xxxxxxx 0xxxxxxx - sizes 16384 to 2097151 (3 bytes)
// 1xxxxxxx 1xxxxxxx 1xxxxxxx 0xxxxxxx - sizes 2097152+ (4 bytes)
if (size <
0x80) {
TRY(writer.WriteU8(size));
}
else if (size <
0x4000) {
TRY(writer.WriteU8(
0x80 | (size >>
7)));
TRY(writer.WriteU8(size &
0x7F));
}
else if (size <
0x200000) {
TRY(writer.WriteU8(
0x80 | (size >>
14)));
TRY(writer.WriteU8(
0x80 | (size >>
7)));
TRY(writer.WriteU8(size &
0x7F));
}
else {
TRY(writer.WriteU8(
0x80 | (size >>
21)));
TRY(writer.WriteU8(
0x80 | (size >>
14)));
TRY(writer.WriteU8(
0x80 | (size >>
7)));
TRY(writer.WriteU8(size &
0x7F));
}
return true;
}
#undef TRY
// ISO/IEC 14496-1 (7.2.6.5.1)
static mozilla::Result<nsTArray<uint8_t>, nsresult> CreateEsds(
const nsTArray<uint8_t>& extradata) {
nsTArray<uint8_t> esds;
mozilla::ByteWriter<mozilla::BigEndian> writer(esds);
#define TRY(x) \
if (!(x)) { \
LOG(
"CreateEsds failed at line {}: {}", __LINE__,
#x); \
return mozilla::Err(nsresult::NS_ERROR_FAILURE); \
}
// ES_Descriptor (ES_DescrTag = 0x03)
// Size calculation breakdown:
// - 3 bytes: ES_ID (2) + flags (1)
// - 5 bytes: DecoderConfigDescriptor tag (1) + size field (4 max)
// - 13 bytes: DecoderConfigDescriptor fixed content
// - 5 bytes: DecoderSpecificInfo tag (1) + size field (4 max)
// - extradata.Length(): AudioSpecificConfig data
const uint32_t kESDescriptorHeaderSize =
3;
// ES_ID + flags
const uint32_t kDecoderConfigDescrTagSize =
5;
// tag + size field
const uint32_t kDecoderConfigDescrFixedSize =
13;
// fixed fields
const uint32_t kDecoderSpecificInfoTagSize =
5;
// tag + size field
const uint32_t esDescriptorSize =
kESDescriptorHeaderSize + kDecoderConfigDescrTagSize +
kDecoderConfigDescrFixedSize + kDecoderSpecificInfoTagSize +
extradata.Length();
WriteDescriptor(writer,
0x03, esDescriptorSize);
TRY(writer.WriteU16(
0x0000));
// ES_ID = 0
TRY(writer.WriteU8(
0x00));
// flags (streamDependenceFlag = 0, URL_Flag = 0,
// OCRstreamFlag = 0, streamPriority = 0)
// DecoderConfigDescriptor (DecoderConfigDescrTag = 0x04)
// ISO/IEC 14496-1 (7.2.6.6)
const uint32_t decoderConfigDescrSize = kDecoderConfigDescrFixedSize +
kDecoderSpecificInfoTagSize +
extradata.Length();
TRY(WriteDescriptor(writer,
0x04, decoderConfigDescrSize));
TRY(writer.WriteU8(
0x40));
// objectTypeIndication = 0x40 (MPEG-4 AAC)
TRY(writer.WriteU8(
0x15));
// streamType = 0x05 (AudioStream), upstream = 0, reserved = 1
// bufferSizeDB = 0 (24 bits) - using default buffer size
TRY(writer.WriteU8(
0x00));
TRY(writer.WriteU16(
0x0000));
TRY(writer.WriteU32(
0x00000000));
// maxBitrate = 0 (no limit)
TRY(writer.WriteU32(
0x00000000));
// avgBitrate = 0 (unknown)
// DecoderSpecificInfo (DecSpecificInfoTag = 0x05)
// Contains the AudioSpecificConfig from ISO/IEC 14496-3 (7.2.6.7: to be
// filled by classes extending it, we just write the extradata extracted from
// the mp4)
TRY(WriteDescriptor(writer,
0x05, extradata.Length()));
TRY(writer.Write(extradata.Elements(), extradata.Length()));
return esds;
}
#undef TRY
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: {} {} Hz {} channels {} bits per channel "
"profile={} extended_profile={}",
mConfig.mMimeType.get(), mConfig.mRate, mConfig.mChannels,
mConfig.mBitDepth, mConfig.mProfile, mConfig.mExtendedProfile);
if (mConfig.mMimeType.EqualsLiteral(
"audio/mpeg")) {
mFormatID = kAudioFormatMPEGLayer3;
}
else if (mConfig.mMimeType.EqualsLiteral(
"audio/mp4a-latm")) {
if (aConfig.mCodecSpecificConfig.is<AacCodecSpecificData>()) {
const AacCodecSpecificData& aacCodecSpecificData =
aConfig.mCodecSpecificConfig.as<AacCodecSpecificData>();
// Check if this is xHE-AAC (USAC) based on profile or extended_profile
if (mConfig.mProfile == AUDIO_OBJECT_TYPE_USAC ||
mConfig.mExtendedProfile == AUDIO_OBJECT_TYPE_USAC) {
mFormatID = kAudioFormatMPEGD_USAC;
LOG(
"AppleATDecoder detected xHE-AAC/USAC format (profile={}, "
"extended_profile={})",
mConfig.mProfile, mConfig.mExtendedProfile);
}
else {
mFormatID = kAudioFormatMPEG4AAC;
}
mEncoderDelay = aacCodecSpecificData.mEncoderDelayFrames;
mTotalMediaFrames = aacCodecSpecificData.mMediaFrameCount;
LOG(
"AppleATDecoder (aac), found encoder delay ({}) and total frame "
"count ({}) in codec-specific side data",
mEncoderDelay, mTotalMediaFrames);
}
else {
mFormatID = kAudioFormatMPEG4AAC;
}
}
else {
mFormatID =
0;
}
}
AppleATDecoder::~AppleATDecoder() {
MOZ_COUNT_DTOR(AppleATDecoder);
MOZ_ASSERT(!mConverter);
}
RefPtr<MediaDataDecoder::InitPromise> AppleATDecoder::Init() {
AUTO_PROFILER_LABEL(
"AppleATDecoder::Init", MEDIA_PLAYBACK);
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() {
AUTO_PROFILER_LABEL(
"AppleATDecoder::Flush", MEDIA_PLAYBACK);
MOZ_ASSERT(mThread->IsOnCurrentThread());
LOG(
"Flushing AudioToolbox AAC decoder");
mQueuedSamples.Clear();
mDecodedSamples.Clear();
if (mConverter) {
OSStatus rv = AudioConverterReset(mConverter);
if (rv) {
LOG(
"Error {} 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() {
AUTO_PROFILER_LABEL(
"AppleATDecoder::Drain", MEDIA_PLAYBACK);
MOZ_ASSERT(mThread->IsOnCurrentThread());
LOG(
"Draining AudioToolbox AAC decoder");
return DecodePromise::CreateAndResolve(DecodedData(), __func__);
}
RefPtr<ShutdownPromise> AppleATDecoder::Shutdown() {
AUTO_PROFILER_LABEL(
"AppleATDecoder::Shutdown", MEDIA_PLAYBACK);
// 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 {} 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 {} 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;
case kAudioFormatMPEGD_USAC:
return "xhe-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) {
AUTO_PROFILER_LABEL(
"AppleATDecoder::Decode", MEDIA_PLAYBACK);
MOZ_ASSERT(mThread->IsOnCurrentThread());
LOG(
"mp4 input sample pts={} duration={} {} {} 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: {}\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 [{}, {}] (duration: {})\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;
if (mFormatID == kAudioFormatMPEGD_USAC && aExtraData.Length() >
0) {
// For xHE-AAC/USAC, we need to use the magic cookie to get the format info
aDesc.mFormatID = mFormatID;
aDesc.mChannelsPerFrame = mConfig.mChannels;
aDesc.mSampleRate = mConfig.mRate;
rv = AudioFormatGetProperty(kAudioFormatProperty_FormatInfo,
aExtraData.Length(), aExtraData.Elements(),
&inputFormatSize, &aDesc);
}
else {
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 {} 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 ({})", 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 ({})", 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 ({}:{})",
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 ({}:{})", 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 == AUDIO_OBJECT_TYPE_USAC) {
LOG(
"Detected xHE-AAC profile 42 (USAC), switching to "
"kAudioFormatMPEGD_USAC");
mFormatID = kAudioFormatMPEGD_USAC;
}
}
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 {} 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:{}", int32_t(status));
ProcessShutdown();
return MediaResult(
NS_ERROR_FAILURE,
RESULT_DETAIL(
"Error setting AudioConverter AAC cookie:%d",
int32_t(status)));
}
}
else if (magicCookie.Length() && mFormatID == kAudioFormatMPEGD_USAC) {
auto maybeEsdsData = CreateEsds(magicCookie);
if (maybeEsdsData.isErr()) {
return MediaResult(NS_ERROR_FAILURE,
RESULT_DETAIL(
"Couldn't create ESDS data"));
}
nsTArray<uint8_t> esdsData = maybeEsdsData.unwrap();
status = AudioConverterSetProperty(
mConverter, kAudioConverterDecompressionMagicCookie,
magicCookie.Length(), magicCookie.Elements());
if (status) {
LOG(
"AudioConvertSetProperty failed: {}", int32_t(status));
return MediaResult(NS_ERROR_FAILURE,
RESULT_DETAIL(
"AudioConverterSetProperty failed: %d",
int32_t(status)));
}
}
if (NS_FAILED(SetupChannelLayout())) {
NS_WARNING(
"Couldn't retrieve channel layout, will use default layout");
}
if (mFormatID == kAudioFormatMPEG4AAC &&
mConfig.mExtendedProfile == AUDIO_OBJECT_TYPE_USAC) {
const Float32 kDefaultLoudness = -
16.
0;
status = AudioConverterSetProperty(
mConverter, kAudioCodecPropertyProgramTargetLevel,
sizeof(kDefaultLoudness), &kDefaultLoudness);
if (status != noErr) {
LOG(
"AudioConverterSetProperty() failed to set loudness: {}",
int(status));
// Non-fatal error, continue
}
// Dynamic range control setting isn't in the SDK yet
// https://developer.apple.com/documentation/http-live-streaming/providing-metadata-for-xhe-aac-video-soundtracks
// Values: none=0, night=1, noisy=2, limited=3
const UInt32 kDefaultEffectType =
3;
status = AudioConverterSetProperty(mConverter, kDynamicRangeControlProperty,
sizeof(kDefaultEffectType),
&kDefaultEffectType);
if (status != noErr) {
LOG(
"AudioConverterSetProperty() failed to set DRC effect type: {}",
int(status));
// Non-fatal error, continue
}
}
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());
LOG(
"MetadataCallback receiving: '{}'", FourCC2Str(aProperty));
if (aProperty == kAudioFileStreamProperty_MagicCookieData) {
UInt32 size;
Boolean writeable;
OSStatus rv =
AudioFileStreamGetPropertyInfo(aStream, aProperty, &size, &writeable);
if (rv) {
LOG(
"Couldn't get property info for '{}' ({})", FourCC2Str(aProperty),
FourCC2Str(rv));
decoder->mFileStreamError =
true;
return;
}
auto data = MakeUnique<uint8_t[]>(size);
rv = AudioFileStreamGetProperty(aStream, aProperty, &size, data.get());
if (rv) {
LOG(
"Couldn't get property '{}' ({})", 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(
"{} 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