HRESULT
WMFAACDecoder::Init(int32_t aChannelCount,
int32_t aSampleRate,
BYTE* aAACAudioSpecificConfig,
UINT32 aAudioConfigLength)
{
HRESULT hr;
// AAC decoder is in msauddecmft on Win8, and msmpeg2adec in earlier versions.
hr = CreateMFT(CLSID_CMSAACDecMFT,
WMFDecoderDllNameFor(AAC),
mDecoder);
if (FAILED(hr)) {
hr = CreateMFT(CLSID_CMSAACDecMFT,
WMFDecoderDllNameFor(AAC),
mDecoder);
if (FAILED(hr)) {
LOG("Failed to create AAC decoder\n");
return E_FAIL;
}
}
BYTE* userData = nullptr;
UINT32 userDataLength;
hr = AACAudioSpecificConfigToUserData(aAACAudioSpecificConfig,
aAudioConfigLength,
&userData,
&userDataLength);
ENSURE(SUCCEEDED(hr), hr);
hr = SetDecoderInputType(aChannelCount, aSampleRate, userData, userDataLength);
delete userData;
ENSURE(SUCCEEDED(hr), hr);
hr = SetDecoderOutputType();
ENSURE(SUCCEEDED(hr), hr);
hr = SendMFTMessage(MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, 0);
ENSURE(SUCCEEDED(hr), hr);
hr = SendMFTMessage(MFT_MESSAGE_NOTIFY_START_OF_STREAM, 0);
ENSURE(SUCCEEDED(hr), hr);
hr = mDecoder->GetInputStreamInfo(0, &mInputStreamInfo);
ENSURE(SUCCEEDED(hr), hr);
hr = mDecoder->GetOutputStreamInfo(0, &mOutputStreamInfo);
ENSURE(SUCCEEDED(hr), hr);
return S_OK;
}
WMFAudioOutputSource::WMFAudioOutputSource(
const mp4_demuxer::AudioDecoderConfig& aConfig)
: mAudioChannels(aConfig.channel_count)
, mAudioBytesPerSample(aConfig.bits_per_sample / 8)
, mAudioRate(aConfig.samples_per_second)
, mAudioFrameOffset(0)
, mAudioFrameSum(0)
, mMustRecaptureAudioPosition(true)
{
MOZ_COUNT_CTOR(WMFAudioOutputSource);
AACAudioSpecificConfigToUserData(&aConfig.audio_specific_config[0],
aConfig.audio_specific_config.length(),
mUserData);
}
WMFAudioMFTManager::WMFAudioMFTManager(
const AudioInfo& aConfig)
: mAudioChannels(aConfig.mChannels)
, mAudioRate(aConfig.mRate)
, mAudioFrameSum(0)
, mMustRecaptureAudioPosition(true)
{
MOZ_COUNT_CTOR(WMFAudioMFTManager);
if (aConfig.mMimeType.EqualsLiteral("audio/mpeg")) {
mStreamType = MP3;
} else if (aConfig.mMimeType.EqualsLiteral("audio/mp4a-latm")) {
mStreamType = AAC;
AACAudioSpecificConfigToUserData(aConfig.mProfile,
aConfig.mCodecSpecificConfig->Elements(),
aConfig.mCodecSpecificConfig->Length(),
mUserData);
} else {
mStreamType = Unknown;
}
}
WMFAudioMFTManager::WMFAudioMFTManager(
const mp4_demuxer::AudioDecoderConfig& aConfig)
: mAudioChannels(aConfig.channel_count)
, mAudioRate(aConfig.samples_per_second)
, mAudioFrameOffset(0)
, mAudioFrameSum(0)
, mMustRecaptureAudioPosition(true)
{
MOZ_COUNT_CTOR(WMFAudioMFTManager);
if (!strcmp(aConfig.mime_type, "audio/mpeg")) {
mStreamType = MP3;
} else if (!strcmp(aConfig.mime_type, "audio/mp4a-latm")) {
mStreamType = AAC;
AACAudioSpecificConfigToUserData(aConfig.aac_profile,
aConfig.audio_specific_config->Elements(),
aConfig.audio_specific_config->Length(),
mUserData);
} else {
mStreamType = Unknown;
}
}
