mirror of
https://github.com/mpv-player/mpv
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f7d7e887d9
git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@2073 b3059339-0415-0410-9bf9-f77b7e298cf2
157 lines
4.5 KiB
C
157 lines
4.5 KiB
C
/********************************************************
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DirectShow audio decoder
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Copyright 2001 Eugene Kuznetsov (divx@euro.ru)
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*********************************************************/
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#include "DS_AudioDecoder.h"
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#include <string.h>
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#include <stdio.h>
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// using namespace std;
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#define __MODULE__ "DirectShow audio decoder"
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const GUID FORMAT_WaveFormatEx = {
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0x05589f81, 0xc356, 0x11CE,
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{ 0xBF, 0x01, 0x00, 0xAA, 0x00, 0x55, 0x59, 0x5A }
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};
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const GUID MEDIATYPE_Audio = {
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0x73647561, 0x0000, 0x0010,
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{ 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 }
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};
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const GUID MEDIASUBTYPE_PCM = {
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0x00000001, 0x0000, 0x0010,
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{ 0x80, 0x00, 0x00, 0xAA, 0x00, 0x38, 0x9B, 0x71 }
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};
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typedef long STDCALL (*GETCLASS) (GUID*, GUID*, void**);
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DS_AudioDecoder::DS_AudioDecoder(const CodecInfo& info, const WAVEFORMATEX* wf)
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: IAudioDecoder(info, wf), m_pDS_Filter(0), m_sVhdr(0), m_sVhdr2(0)
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{
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int sz = 18 + wf->cbSize;
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m_sVhdr=new char[sz];
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memcpy(m_sVhdr, wf, sz);
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m_sVhdr2=new char[sz];
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memcpy(m_sVhdr2, m_sVhdr, sz);
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WAVEFORMATEX* pWF=(WAVEFORMATEX*)m_sVhdr2;
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pWF->wFormatTag=1;
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pWF->wBitsPerSample=16;
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pWF->nBlockAlign=2*pWF->nChannels;
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pWF->cbSize=0;
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in_fmt=*wf;
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memset(&m_sOurType, 0, sizeof(m_sOurType));
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m_sOurType.majortype=MEDIATYPE_Audio;
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m_sOurType.subtype=MEDIASUBTYPE_PCM;
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m_sOurType.subtype.f1=wf->wFormatTag;
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m_sOurType.formattype=FORMAT_WaveFormatEx;
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m_sOurType.lSampleSize=wf->nBlockAlign;
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m_sOurType.bFixedSizeSamples=true;
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m_sOurType.bTemporalCompression=false;
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m_sOurType.pUnk=0;
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m_sOurType.cbFormat=sz;
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m_sOurType.pbFormat=m_sVhdr;
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memset(&m_sDestType, 0, sizeof(m_sDestType));
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m_sDestType.majortype=MEDIATYPE_Audio;
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m_sDestType.subtype=MEDIASUBTYPE_PCM;
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m_sDestType.formattype=FORMAT_WaveFormatEx;
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m_sDestType.bFixedSizeSamples=true;
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m_sDestType.bTemporalCompression=false;
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m_sDestType.lSampleSize=2*wf->nChannels;
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m_sDestType.pUnk=0;
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m_sDestType.cbFormat=pWF->cbSize;
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m_sDestType.pbFormat=m_sVhdr2;
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try
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{
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m_pDS_Filter = new DS_Filter();
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m_pDS_Filter->Create(info.dll, &info.guid, &m_sOurType, &m_sDestType);
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m_pDS_Filter->Start();
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ALLOCATOR_PROPERTIES props, props1;
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props.cBuffers=1;
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props.cbBuffer=m_sOurType.lSampleSize;
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props.cbAlign=props.cbPrefix=0;
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m_pDS_Filter->m_pAll->vt->SetProperties(m_pDS_Filter->m_pAll, &props, &props1);
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m_pDS_Filter->m_pAll->vt->Commit(m_pDS_Filter->m_pAll);
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}
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catch (FatalError e)
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{
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e.PrintAll();
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delete[] m_sVhdr;
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delete[] m_sVhdr2;
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delete m_pDS_Filter;
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throw;
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}
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}
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DS_AudioDecoder::~DS_AudioDecoder()
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{
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delete[] m_sVhdr;
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delete[] m_sVhdr2;
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delete m_pDS_Filter;
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}
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int DS_AudioDecoder::Convert(const void* in_data, uint_t in_size,
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void* out_data, uint_t out_size,
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uint_t* size_read, uint_t* size_written)
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{
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if (!in_data || !out_data)
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return -1;
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uint_t written = 0;
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uint_t read = 0;
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in_size -= in_size%in_fmt.nBlockAlign;
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while (in_size>0)
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{
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uint_t frame_size=0;
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char* frame_pointer;
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// m_pOurOutput->SetFramePointer(out_data+written);
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m_pDS_Filter->m_pOurOutput->SetFramePointer(&frame_pointer);
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m_pDS_Filter->m_pOurOutput->SetFrameSizePointer((long*)&frame_size);
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IMediaSample* sample=0;
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m_pDS_Filter->m_pAll->vt->GetBuffer(m_pDS_Filter->m_pAll, &sample, 0, 0, 0);
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if(!sample)
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{
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Debug printf("DS_AudioDecoder::Convert() Error: null sample\n");
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break;
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}
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char* ptr;
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sample->vt->GetPointer(sample, (BYTE **)&ptr);
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memcpy(ptr, (const uint8_t*)in_data + read, in_fmt.nBlockAlign);
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sample->vt->SetActualDataLength(sample, in_fmt.nBlockAlign);
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sample->vt->SetSyncPoint(sample, true);
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sample->vt->SetPreroll(sample, 0);
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int result = m_pDS_Filter->m_pImp->vt->Receive(m_pDS_Filter->m_pImp, sample);
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if (result)
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Debug printf("DS_AudioDecoder::Convert() Error: putting data into input pin %x\n", result);
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if ((written + frame_size) > out_size)
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{
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sample->vt->Release((IUnknown*)sample);
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break;
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}
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memcpy((uint8_t*)out_data + written, frame_pointer, frame_size);
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sample->vt->Release((IUnknown*)sample);
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read+=in_fmt.nBlockAlign;
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written+=frame_size;
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}
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if (size_read)
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*size_read = read;
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if (size_written)
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*size_written = written;
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return 0;
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}
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int DS_AudioDecoder::GetSrcSize(int dest_size)
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{
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double efficiency = (double) in_fmt.nAvgBytesPerSec
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/ (in_fmt.nSamplesPerSec*in_fmt.nBlockAlign);
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int frames = int(dest_size*efficiency);
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if (frames < 1)
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frames = 1;
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return frames * in_fmt.nBlockAlign;
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}
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