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/********************************************************
DirectShow audio decoder
Copyright 2001 Eugene Kuznetsov (divx@euro.ru)
*********************************************************/
#include "DS_AudioDecoder.h"
#include <string.h>
#include <stdio.h>
// using namespace std;
#define __MODULE__ "DirectShow audio decoder"
const GUID FORMAT_WaveFormatEx = {
0x05589f81, 0xc356, 0x11CE,
{ 0xBF, 0x01, 0x00, 0xAA, 0x00, 0x55, 0x59, 0x5A }
};
const GUID MEDIATYPE_Audio = {
0x73647561, 0x0000, 0x0010,
{ 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 }
};
const GUID MEDIASUBTYPE_PCM = {
0x00000001, 0x0000, 0x0010,
{ 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 }
};
typedef long STDCALL (*GETCLASS) (GUID*, GUID*, void**);
DS_AudioDecoder::DS_AudioDecoder(const CodecInfo& info, const WAVEFORMATEX* wf)
: IAudioDecoder(info, wf), m_pDS_Filter(0), m_sVhdr(0), m_sVhdr2(0)
{
int sz = 18 + wf->cbSize;
m_sVhdr=new char[sz];
memcpy(m_sVhdr, wf, sz);
m_sVhdr2=new char[sz];
memcpy(m_sVhdr2, m_sVhdr, sz);
WAVEFORMATEX* pWF=(WAVEFORMATEX*)m_sVhdr2;
pWF->wFormatTag=1;
pWF->wBitsPerSample=16;
pWF->nBlockAlign=2*pWF->nChannels;
pWF->cbSize=0;
in_fmt=*wf;
memset(&m_sOurType, 0, sizeof(m_sOurType));
m_sOurType.majortype=MEDIATYPE_Audio;
m_sOurType.subtype=MEDIASUBTYPE_PCM;
m_sOurType.subtype.f1=wf->wFormatTag;
m_sOurType.formattype=FORMAT_WaveFormatEx;
m_sOurType.lSampleSize=wf->nBlockAlign;
m_sOurType.bFixedSizeSamples=true;
m_sOurType.bTemporalCompression=false;
m_sOurType.pUnk=0;
m_sOurType.cbFormat=sz;
m_sOurType.pbFormat=m_sVhdr;
memset(&m_sDestType, 0, sizeof(m_sDestType));
m_sDestType.majortype=MEDIATYPE_Audio;
m_sDestType.subtype=MEDIASUBTYPE_PCM;
m_sDestType.formattype=FORMAT_WaveFormatEx;
m_sDestType.bFixedSizeSamples=true;
m_sDestType.bTemporalCompression=false;
m_sDestType.lSampleSize=2*wf->nChannels;
m_sDestType.pUnk=0;
m_sDestType.cbFormat=pWF->cbSize;
m_sDestType.pbFormat=m_sVhdr2;
try
{
m_pDS_Filter = new DS_Filter();
m_pDS_Filter->Create(info.dll.c_str(), &info.guid, &m_sOurType, &m_sDestType);
m_pDS_Filter->Start();
ALLOCATOR_PROPERTIES props, props1;
props.cBuffers=1;
props.cbBuffer=m_sOurType.lSampleSize;
props.cbAlign=props.cbPrefix=0;
m_pDS_Filter->m_pAll->vt->SetProperties(m_pDS_Filter->m_pAll, &props, &props1);
m_pDS_Filter->m_pAll->vt->Commit(m_pDS_Filter->m_pAll);
}
catch (FatalError e)
{
e.PrintAll();
delete[] m_sVhdr;
delete[] m_sVhdr2;
delete m_pDS_Filter;
throw;
}
}
DS_AudioDecoder::~DS_AudioDecoder()
{
delete[] m_sVhdr;
delete[] m_sVhdr2;
delete m_pDS_Filter;
}
int DS_AudioDecoder::Convert(const void* in_data, uint_t in_size,
void* out_data, uint_t out_size,
uint_t* size_read, uint_t* size_written)
{
if (!in_data || !out_data)
return -1;
uint_t written = 0;
uint_t read = 0;
in_size -= in_size%in_fmt.nBlockAlign;
while (in_size>0)
{
uint_t frame_size=0;
char* frame_pointer;
// m_pOurOutput->SetFramePointer(out_data+written);
m_pDS_Filter->m_pOurOutput->SetFramePointer(&frame_pointer);
m_pDS_Filter->m_pOurOutput->SetFrameSizePointer((long*)&frame_size);
IMediaSample* sample=0;
m_pDS_Filter->m_pAll->vt->GetBuffer(m_pDS_Filter->m_pAll, &sample, 0, 0, 0);
if(!sample)
{
Debug printf("DS_AudioDecoder::Convert() Error: null sample\n");
break;
}
char* ptr;
sample->vt->GetPointer(sample, (BYTE **)&ptr);
memcpy(ptr, (const uint8_t*)in_data + read, in_fmt.nBlockAlign);
sample->vt->SetActualDataLength(sample, in_fmt.nBlockAlign);
sample->vt->SetSyncPoint(sample, true);
sample->vt->SetPreroll(sample, 0);
int result = m_pDS_Filter->m_pImp->vt->Receive(m_pDS_Filter->m_pImp, sample);
if (result)
Debug printf("DS_AudioDecoder::Convert() Error: putting data into input pin %x\n", result);
if ((written + frame_size) > out_size)
{
sample->vt->Release((IUnknown*)sample);
break;
}
memcpy((uint8_t*)out_data + written, frame_pointer, frame_size);
sample->vt->Release((IUnknown*)sample);
read+=in_fmt.nBlockAlign;
written+=frame_size;
}
if (size_read)
*size_read = read;
if (size_written)
*size_written = written;
return 0;
}
int DS_AudioDecoder::GetSrcSize(int dest_size)
{
double efficiency = (double) in_fmt.nAvgBytesPerSec
/ (in_fmt.nSamplesPerSec*in_fmt.nBlockAlign);
int frames = int(dest_size*efficiency);
if (frames < 1)
frames = 1;
return frames * in_fmt.nBlockAlign;
}
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