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/* Copyright (C) 2013 Mamadou DIOP
* Copyright (C) 2013 Doubango Telecom <http://www.doubango.org>
*
* This file is part of Open Source Doubango Framework.
*
* DOUBANGO is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* DOUBANGO is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with DOUBANGO.
*/
#include "plugin_audio_dsp_utils.h"
#include "tsk_debug.h"
#include <uuids.h>
#include <Dmo.h>
#include <Mfapi.h>
#include <assert.h>
bool AudioDSPUtils::g_bStarted = false;
HRESULT AudioDSPUtils::Startup()
{
if(!g_bStarted) {
HRESULT hr = CoInitializeEx(NULL, COINIT_MULTITHREADED);
if(SUCCEEDED(hr) || hr == 0x80010106) { // 0x80010106 when called from managed code (e.g. Boghe) - More info: http://support.microsoft.com/kb/824480
hr = MFStartup(MF_VERSION);
}
g_bStarted = SUCCEEDED(hr);
return hr;
}
return S_OK;
}
HRESULT AudioDSPUtils::Shutdown()
{
return S_OK;
}
HRESULT AudioDSPUtils::CreatePCMAudioType(
UINT32 sampleRate, // Samples per second
UINT32 bitsPerSample, // Bits per sample
UINT32 cChannels, // Number of channels
IMFMediaType **ppType // Receives a pointer to the media type.
)
{
HRESULT hr = S_OK;
IMFMediaType *pType = NULL;
// Calculate derived values.
UINT32 blockAlign = cChannels * (bitsPerSample >> 3);
UINT32 bytesPerSecond = blockAlign * sampleRate;
// Create the empty media type.
CHECK_HR(hr = MFCreateMediaType(&pType));
// Set attributes on the type.
CHECK_HR(hr = pType->SetGUID(MF_MT_MAJOR_TYPE, MFMediaType_Audio));
CHECK_HR(hr = pType->SetGUID(MF_MT_SUBTYPE, MFAudioFormat_PCM));
CHECK_HR(hr = pType->SetUINT32(MF_MT_AUDIO_NUM_CHANNELS, cChannels));
CHECK_HR(hr = pType->SetUINT32(MF_MT_AUDIO_SAMPLES_PER_SECOND, sampleRate));
CHECK_HR(hr = pType->SetUINT32(MF_MT_AUDIO_BLOCK_ALIGNMENT, blockAlign));
CHECK_HR(hr = pType->SetUINT32(MF_MT_AUDIO_AVG_BYTES_PER_SECOND, bytesPerSecond));
CHECK_HR(hr = pType->SetUINT32(MF_MT_AUDIO_BITS_PER_SAMPLE, bitsPerSample));
CHECK_HR(hr = pType->SetUINT32(MF_MT_ALL_SAMPLES_INDEPENDENT, TRUE));
CHECK_HR(hr = pType->SetUINT32(MF_MT_FIXED_SIZE_SAMPLES, TRUE));
*ppType = pType;
(*ppType)->AddRef();
bail:
SafeRelease(&pType);
return hr;
}
HRESULT AudioDSPUtils::CreateMediaSample(
DWORD cbData, // Maximum buffer size
IMFSample **ppSample // Receives the sample
)
{
HRESULT hr = S_OK;
if(!ppSample) {
CHECK_HR(hr = E_POINTER);
}
IMFSample *pSample = NULL;
IMFMediaBuffer *pBuffer = NULL;
CHECK_HR(hr = MFCreateSample(&pSample));
CHECK_HR(hr = MFCreateMemoryBuffer(cbData, &pBuffer));
CHECK_HR(hr = pSample->AddBuffer(pBuffer));
*ppSample = pSample;
(*ppSample)->AddRef();
bail:
SafeRelease(&pSample);
SafeRelease(&pBuffer);
return hr;
}
HRESULT AudioDSPUtils::MoInitMediaType(
UINT32 sampleRate, // Samples per second
UINT32 bitsPerSample, // Bits per sample
UINT32 cChannels, // Number of channels
DMO_MEDIA_TYPE *pType // The media type to initialize. Must be freed using MoFreeMediaType.
)
{
HRESULT hr = S_OK;
WAVEFORMATEX *pWAV = NULL;
if(!pType) {
CHECK_HR(hr = E_POINTER);
}
pType->majortype = MEDIATYPE_Audio;
pType->subtype = MEDIASUBTYPE_PCM;
pType->lSampleSize = 0;
pType->bFixedSizeSamples = TRUE;
pType->bTemporalCompression = FALSE;
pType->formattype = FORMAT_WaveFormatEx;
CHECK_HR(hr = ::MoInitMediaType(pType, sizeof(WAVEFORMATEX)));
pWAV = (WAVEFORMATEX*)pType->pbFormat;
pWAV->wFormatTag = WAVE_FORMAT_PCM;
pWAV->nChannels = 1;
pWAV->nSamplesPerSec = sampleRate;
pWAV->nBlockAlign = cChannels * (bitsPerSample >> 3);
pWAV->nAvgBytesPerSec = pWAV->nBlockAlign * pWAV->nSamplesPerSec;
pWAV->wBitsPerSample = bitsPerSample;
pWAV->cbSize = 0;
bail:
return hr;
}
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