mirror of https://github.com/mpv-player/mpv
193 lines
5.4 KiB
C
193 lines
5.4 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 "config.h"
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#include "libwin32.h"
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#include "DS_Filter.h"
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struct _DS_AudioDecoder
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{
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WAVEFORMATEX in_fmt;
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AM_MEDIA_TYPE m_sOurType, m_sDestType;
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DS_Filter* m_pDS_Filter;
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char* m_sVhdr;
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char* m_sVhdr2;
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};
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#include "DS_AudioDecoder.h"
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#ifdef WIN32_LOADER
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#include "../ldt_keeper.h"
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#endif
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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typedef long STDCALL (*GETCLASS) (GUID*, GUID*, void**);
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static SampleProcUserData sampleProcData;
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DS_AudioDecoder * DS_AudioDecoder_Open(char* dllname, GUID* guid, WAVEFORMATEX* wf)
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//DS_AudioDecoder * DS_AudioDecoder_Create(const CodecInfo * info, const WAVEFORMATEX* wf)
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{
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DS_AudioDecoder *this;
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int sz;
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WAVEFORMATEX* pWF;
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#ifdef WIN32_LOADER
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Setup_LDT_Keeper();
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Setup_FS_Segment();
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#endif
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this = malloc(sizeof(DS_AudioDecoder));
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sz = 18 + wf->cbSize;
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this->m_sVhdr = malloc(sz);
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memcpy(this->m_sVhdr, wf, sz);
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this->m_sVhdr2 = malloc(18);
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memcpy(this->m_sVhdr2, this->m_sVhdr, 18);
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pWF = (WAVEFORMATEX*)this->m_sVhdr2;
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pWF->wFormatTag = 1;
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pWF->wBitsPerSample = 16;
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pWF->nBlockAlign = pWF->nChannels * (pWF->wBitsPerSample + 7) / 8;
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pWF->cbSize = 0;
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pWF->nAvgBytesPerSec = pWF->nBlockAlign * pWF->nSamplesPerSec;
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memcpy(&this->in_fmt,wf,sizeof(WAVEFORMATEX));
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memset(&this->m_sOurType, 0, sizeof(this->m_sOurType));
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this->m_sOurType.majortype=MEDIATYPE_Audio;
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this->m_sOurType.subtype=MEDIASUBTYPE_PCM;
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this->m_sOurType.subtype.f1=wf->wFormatTag;
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this->m_sOurType.formattype=FORMAT_WaveFormatEx;
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this->m_sOurType.lSampleSize=wf->nBlockAlign;
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this->m_sOurType.bFixedSizeSamples=1;
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this->m_sOurType.bTemporalCompression=0;
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this->m_sOurType.pUnk=0;
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this->m_sOurType.cbFormat=sz;
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this->m_sOurType.pbFormat=this->m_sVhdr;
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memset(&this->m_sDestType, 0, sizeof(this->m_sDestType));
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this->m_sDestType.majortype=MEDIATYPE_Audio;
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this->m_sDestType.subtype=MEDIASUBTYPE_PCM;
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// this->m_sDestType.subtype.f1=pWF->wFormatTag;
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this->m_sDestType.formattype=FORMAT_WaveFormatEx;
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this->m_sDestType.bFixedSizeSamples=1;
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this->m_sDestType.bTemporalCompression=0;
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this->m_sDestType.lSampleSize=pWF->nBlockAlign;
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if (wf->wFormatTag == 0x130)
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// ACEL hack to prevent memory corruption
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// obviosly we are missing something here
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this->m_sDestType.lSampleSize *= 288;
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this->m_sDestType.pUnk=0;
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this->m_sDestType.cbFormat=18; //pWF->cbSize;
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this->m_sDestType.pbFormat=this->m_sVhdr2;
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//print_wave_header(this->m_sVhdr, MSGL_V);
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//print_wave_header(this->m_sVhdr2, MSGL_V);
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/*try*/
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{
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this->m_pDS_Filter = DS_FilterCreate(dllname, guid, &this->m_sOurType, &this->m_sDestType,&sampleProcData);
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if( !this->m_pDS_Filter ) {
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free(this);
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return NULL;
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}
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//Commit should be done before binary codec start
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this->m_pDS_Filter->m_pAll->vt->Commit(this->m_pDS_Filter->m_pAll);
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this->m_pDS_Filter->Start(this->m_pDS_Filter);
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}
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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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return this;
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}
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void DS_AudioDecoder_Destroy(DS_AudioDecoder *this)
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{
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free(this->m_sVhdr);
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free(this->m_sVhdr2);
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DS_Filter_Destroy(this->m_pDS_Filter);
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free(this);
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}
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int DS_AudioDecoder_Convert(DS_AudioDecoder *this, const void* in_data, unsigned int in_size,
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void* out_data, unsigned int out_size,
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unsigned int* size_read, unsigned int* size_written)
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{
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unsigned int written = 0;
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unsigned int read = 0;
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if (!in_data || !out_data)
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return -1;
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#ifdef WIN32_LOADER
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Setup_FS_Segment();
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#endif
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in_size -= in_size%this->in_fmt.nBlockAlign;
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while (in_size>0)
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{
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IMediaSample* sample=0;
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char* ptr;
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int result;
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this->m_pDS_Filter->m_pAll->vt->GetBuffer(this->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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sample->vt->SetActualDataLength(sample, this->in_fmt.nBlockAlign);
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sample->vt->GetPointer(sample, (BYTE **)&ptr);
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memcpy(ptr, (const uint8_t*)in_data + read, this->in_fmt.nBlockAlign);
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sample->vt->SetSyncPoint(sample, 1);
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sample->vt->SetPreroll(sample, 0);
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result = this->m_pDS_Filter->m_pImp->vt->Receive(this->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 + sampleProcData.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, sampleProcData.frame_pointer, sampleProcData.frame_size);
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sample->vt->Release((IUnknown*)sample);
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read+=this->in_fmt.nBlockAlign;
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written+=sampleProcData.frame_size;
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break;
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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(DS_AudioDecoder *this, int dest_size)
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{
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double efficiency =(double) this->in_fmt.nAvgBytesPerSec
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/ (this->in_fmt.nSamplesPerSec*this->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 * this->in_fmt.nBlockAlign;
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}
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