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#include "MFTDecoder.h"
#include "util.h"
#include "../nsutil/pcm.h"
#include <Mfapi.h>
#include <Mferror.h>
static // Release the events that an MFT might allocate in IMFTransform::ProcessOutput().
void ReleaseEventCollection(MFT_OUTPUT_DATA_BUFFER* pBuffers)
{
if (pBuffers->pEvents)
{
pBuffers->pEvents->Release();
pBuffers->pEvents = NULL;
}
}
MFTDecoder::MFTDecoder()
{
decoder=0;
output_buffer=0;
output_sample=0;
}
MFTDecoder::~MFTDecoder()
{
if (decoder) {
decoder->Release();
}
decoder = 0;
if (output_buffer) {
output_buffer->Release();
}
output_buffer = 0;
if (output_sample) {
output_sample->Release();
}
output_sample = 0;
}
HRESULT MFTDecoder::Open(const void *asc, size_t asc_bytes)
{
HRESULT hr = CreateAACDecoder(&decoder, asc, asc_bytes);
if (SUCCEEDED(hr)) {
decoder->ProcessMessage(MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, 0);
}
return hr;
}
HRESULT MFTDecoder::Open()
{
HRESULT hr = CreateADTSDecoder(&decoder);
if (SUCCEEDED(hr)) {
decoder->ProcessMessage(MFT_MESSAGE_NOTIFY_BEGIN_STREAMING, 0);
decoder->ProcessMessage(MFT_MESSAGE_NOTIFY_START_OF_STREAM, 0);
}
return hr;
}
void MFTDecoder::Flush()
{
if (decoder) {
decoder->ProcessMessage(MFT_MESSAGE_COMMAND_FLUSH, 0);
}
}
HRESULT MFTDecoder::GetOutputProperties(uint32_t *sampleRate, uint32_t *channels)
{
HRESULT hr;
IMFMediaType *media_type;
UINT32 local_sample_rate, local_channels;
if (!decoder) {
return E_FAIL;
}
hr = decoder->GetOutputCurrentType(0, &media_type);
if (FAILED(hr)) {
return hr;
}
if (FAILED(hr=media_type->GetUINT32(MF_MT_AUDIO_SAMPLES_PER_SECOND, &local_sample_rate))
|| FAILED(hr=media_type->GetUINT32(MF_MT_AUDIO_NUM_CHANNELS, &local_channels))) {
media_type->Release();
return hr;
}
*sampleRate = local_sample_rate;
*channels = local_channels;
return hr;
}
HRESULT MFTDecoder::Feed(const void *inputBuffer, size_t inputBufferBytes)
{
HRESULT hr;
if (inputBuffer && inputBufferBytes) {
IMFMediaBuffer *media_buffer=0;
IMFSample *media_sample=0;
MFCreateMemoryBuffer((DWORD)inputBufferBytes, &media_buffer);
MFCreateSample(&media_sample);
media_sample->AddBuffer(media_buffer);
BYTE *buffer;
DWORD max_length, current_length;
media_buffer->Lock(&buffer, &max_length, ¤t_length);
memcpy(buffer, inputBuffer, inputBufferBytes);
media_buffer->Unlock();
media_buffer->SetCurrentLength((DWORD)inputBufferBytes);
hr = decoder->ProcessInput(0, media_sample, 0);
media_sample->Release();
media_buffer->Release();
media_sample=0;
media_buffer=0;
} else {
decoder->ProcessMessage(MFT_MESSAGE_NOTIFY_END_OF_STREAM, 0);
decoder->ProcessMessage(MFT_MESSAGE_COMMAND_DRAIN, 0);
}
return S_OK;
}
HRESULT MFTDecoder::Decode(void *outputBuffer, size_t *outputBufferBytes, unsigned int bitsPerSample, bool isFloat, double gain)
{
HRESULT hr;
if (!output_sample) {
MFT_OUTPUT_STREAM_INFO output_stream_info;
hr = decoder->GetOutputStreamInfo(0, &output_stream_info);
if (FAILED(hr)) {
return hr;
}
MFCreateMemoryBuffer(output_stream_info.cbSize, &output_buffer);
MFCreateSample(&output_sample);
output_sample->AddBuffer(output_buffer);
}
output_buffer->SetCurrentLength(0);
MFT_OUTPUT_DATA_BUFFER output_data_buffer = {0, output_sample, 0, 0};
DWORD status=0;
hr = decoder->ProcessOutput(0, 1, &output_data_buffer, &status);
if (hr == MF_E_TRANSFORM_NEED_MORE_INPUT) {
*outputBufferBytes = 0;
return S_OK;
} else if (hr == MF_E_TRANSFORM_STREAM_CHANGE) {
AssociateFloat(decoder);
*outputBufferBytes = 0;
return hr;
}
IMFMediaBuffer *decimation_buffer;
hr = output_data_buffer.pSample->ConvertToContiguousBuffer(&decimation_buffer);
float *pcm;
DWORD max_length, current_length;
decimation_buffer->Lock((BYTE **)&pcm, &max_length, ¤t_length);
size_t num_samples = current_length / 4;
*outputBufferBytes = num_samples*bitsPerSample/8;
if (!isFloat)
{
nsutil_pcm_FloatToInt_Interleaved_Gain(outputBuffer, pcm, bitsPerSample, num_samples, (float)gain);
}
else
{
for (size_t i = 0;i != num_samples;i++)
((float *)outputBuffer)[i] = pcm[i] * (float)gain;
}
decimation_buffer->Unlock();
decimation_buffer->Release();
ReleaseEventCollection(&output_data_buffer);
return S_OK;
}
HRESULT MFTDecoder::OutputBlockSizeSamples(size_t *frameSize)
{
HRESULT hr;
MFT_OUTPUT_STREAM_INFO output_stream_info;
if (!decoder) {
return E_FAIL;
}
hr = decoder->GetOutputStreamInfo(0, &output_stream_info);
if (FAILED(hr)) {
return hr;
}
*frameSize = output_stream_info.cbSize;
return hr;
}
bool MFTDecoder::AcceptingInput()
{
DWORD flags;
if (decoder && SUCCEEDED(decoder->GetInputStatus(0, &flags))) {
if (flags & MFT_INPUT_STATUS_ACCEPT_DATA) {
return true;
}
}
return false;
}
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