mpv/libmpdemux/muxer_avi.c

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <inttypes.h>
#include <unistd.h>

#include "config.h"
#include "../version.h"

//#include "stream.h"
//#include "demuxer.h"
//#include "stheader.h"

#include "wine/mmreg.h"
#include "wine/avifmt.h"
#include "wine/vfw.h"
#include "bswap.h"

#include "muxer.h"
#include "aviheader.h"

extern char *info_name;
extern char *info_artist;
extern char *info_genre;
extern char *info_subject;
extern char *info_copyright;
extern char *info_sourceform;
extern char *info_comment;

static muxer_stream_t* avifile_new_stream(muxer_t *muxer,int type){
    muxer_stream_t* s;
    if (!muxer) return NULL;
    if(muxer->avih.dwStreams>=MUXER_MAX_STREAMS){
	printf("Too many streams! increase MUXER_MAX_STREAMS !\n");
	return NULL;
    }
    s=malloc(sizeof(muxer_stream_t));
    memset(s,0,sizeof(muxer_stream_t));
    if(!s) return NULL; // no mem!?
    muxer->streams[muxer->avih.dwStreams]=s;
    s->type=type;
    s->id=muxer->avih.dwStreams;
    s->timer=0.0;
    s->size=0;
    s->muxer=muxer;
    switch(type){
    case MUXER_TYPE_VIDEO:
      s->ckid=mmioFOURCC(('0'+s->id/10),('0'+(s->id%10)),'d','c');
      s->h.fccType=streamtypeVIDEO;
      if(!muxer->def_v) muxer->def_v=s;
      break;
    case MUXER_TYPE_AUDIO:
      s->ckid=mmioFOURCC(('0'+s->id/10),('0'+(s->id%10)),'w','b');
      s->h.fccType=streamtypeAUDIO;
      break;
    default:
      printf("WarninG! unknown stream type: %d\n",type);
      return NULL;
    }
    muxer->avih.dwStreams++;
    return s;
}

static void write_avi_chunk(FILE *f,unsigned int id,int len,void* data){
 int le_len = le2me_32(len);
 int le_id = le2me_32(id);
 fwrite(&le_id,4,1,f);
 fwrite(&le_len,4,1,f);

if(len>0){
  if(data){
    // DATA
    fwrite(data,len,1,f);
    if(len&1){  // padding
      unsigned char zerobyte=0;
      fwrite(&zerobyte,1,1,f);
    }
  } else {
    // JUNK
    char *avi_junk_data="[= MPlayer junk data! =]";
    if(len&1) ++len; // padding
    while(len>0){
      int l=strlen(avi_junk_data);
      if(l>len) l=len;
      fwrite(avi_junk_data,l,1,f);
      len-=l;
    }
  }
}
}

static void avifile_write_chunk(muxer_stream_t *s,size_t len,unsigned int flags){
    muxer_t *muxer=s->muxer;

    // add to the index:
    if(muxer->idx_pos>=muxer->idx_size){
	muxer->idx_size+=256; // 4kB
	muxer->idx=realloc(muxer->idx,16*muxer->idx_size);
    }
    muxer->idx[muxer->idx_pos].ckid=s->ckid;
    muxer->idx[muxer->idx_pos].dwFlags=flags; // keyframe?
    muxer->idx[muxer->idx_pos].dwChunkOffset=ftell(muxer->file)-(muxer->movi_start-4);
    muxer->idx[muxer->idx_pos].dwChunkLength=len;
    ++muxer->idx_pos;

    // write out the chunk:
    write_avi_chunk(muxer->file,s->ckid,len,s->buffer); /* unsigned char */

    // alter counters:
    if(s->h.dwSampleSize){
	// CBR
	s->h.dwLength+=len/s->h.dwSampleSize;
	if(len%s->h.dwSampleSize) printf("Warning! len isn't divisable by samplesize!\n");
    } else {
	// VBR
	s->h.dwLength++;
    }
    s->timer=(double)s->h.dwLength*s->h.dwScale/s->h.dwRate;
    s->size+=len;
    if((unsigned int)len>s->h.dwSuggestedBufferSize) s->h.dwSuggestedBufferSize=len;

}

static void write_avi_list(FILE *f,unsigned int id,int len){
  unsigned int list_id=FOURCC_LIST;
  int le_len;
  int le_id;
  len+=4; // list fix
  list_id = le2me_32(list_id);
  le_len = le2me_32(len);
  le_id = le2me_32(id);
  fwrite(&list_id,4,1,f);
  fwrite(&le_len,4,1,f);
  fwrite(&le_id,4,1,f);
}

#define WFSIZE(wf) (sizeof(WAVEFORMATEX)+(wf)->cbSize)

static void avifile_write_header(muxer_t *muxer){
  uint32_t riff[3];
  unsigned int i;
  unsigned int hdrsize;
  muxer_info_t info[16];
  FILE *f=muxer->file;

  // RIFF header:
  riff[0]=mmioFOURCC('R','I','F','F');
  riff[1]=muxer->file_end-2*sizeof(unsigned int);  // filesize
  riff[2]=formtypeAVI; // 'AVI '
  riff[0]=le2me_32(riff[0]);
  riff[1]=le2me_32(riff[1]);
  riff[2]=le2me_32(riff[2]);
  fwrite(&riff,12,1,f);
  // update AVI header:
  if(muxer->def_v){
      muxer->avih.dwMicroSecPerFrame=1000000.0*muxer->def_v->h.dwScale/muxer->def_v->h.dwRate;
//      muxer->avih.dwMaxBytesPerSec=1000000; // dummy!!!!! FIXME
//      muxer->avih.dwPaddingGranularity=2; // ???
      muxer->avih.dwFlags|=AVIF_ISINTERLEAVED|AVIF_TRUSTCKTYPE;
      muxer->avih.dwTotalFrames=muxer->def_v->h.dwLength;
//      muxer->avih.dwSuggestedBufferSize=muxer->def_v->h.dwSuggestedBufferSize;
      muxer->avih.dwWidth=muxer->def_v->bih->biWidth;
      muxer->avih.dwHeight=muxer->def_v->bih->biHeight;
  }

  // AVI header:
  hdrsize=sizeof(muxer->avih)+8;
  // calc total header size:
  for(i=0;i<muxer->avih.dwStreams;i++){
      hdrsize+=12; // LIST
      hdrsize+=sizeof(muxer->streams[i]->h)+8; // strh
      switch(muxer->streams[i]->type){
      case MUXER_TYPE_VIDEO:
          hdrsize+=muxer->streams[i]->bih->biSize+8; // strf
	  break;
      case MUXER_TYPE_AUDIO:
          hdrsize+=WFSIZE(muxer->streams[i]->wf)+8; // strf
	  break;
      }
  }
  write_avi_list(f,listtypeAVIHEADER,hdrsize);
  
  le2me_MainAVIHeader(&muxer->avih);
  write_avi_chunk(f,ckidAVIMAINHDR,sizeof(muxer->avih),&muxer->avih); /* MainAVIHeader */
  le2me_MainAVIHeader(&muxer->avih);

  // stream headers:
  for(i=0;i<muxer->avih.dwStreams;i++){
      hdrsize=sizeof(muxer->streams[i]->h)+8; // strh
      switch(muxer->streams[i]->type){
      case MUXER_TYPE_VIDEO:
          hdrsize+=muxer->streams[i]->bih->biSize+8; // strf
          muxer->streams[i]->h.fccHandler = muxer->streams[i]->bih->biCompression;
	  break;
      case MUXER_TYPE_AUDIO:
          hdrsize+=WFSIZE(muxer->streams[i]->wf)+8; // strf
          muxer->streams[i]->h.fccHandler = muxer->streams[i]->wf->wFormatTag;
	  break;
      }
      write_avi_list(f,listtypeSTREAMHEADER,hdrsize);
      le2me_AVIStreamHeader(&muxer->streams[i]->h);
      write_avi_chunk(f,ckidSTREAMHEADER,sizeof(muxer->streams[i]->h),&muxer->streams[i]->h); /* AVISTreamHeader */ // strh
      le2me_AVIStreamHeader(&muxer->streams[i]->h);

      switch(muxer->streams[i]->type){
      case MUXER_TYPE_VIDEO:
{
          int biSize=muxer->streams[i]->bih->biSize;
          le2me_BITMAPINFOHEADER(muxer->streams[i]->bih);
          write_avi_chunk(f,ckidSTREAMFORMAT,biSize,muxer->streams[i]->bih); /* BITMAPINFOHEADER */
          le2me_BITMAPINFOHEADER(muxer->streams[i]->bih);
}
	  break;
      case MUXER_TYPE_AUDIO:
{
          int wfsize = WFSIZE(muxer->streams[i]->wf);
          le2me_WAVEFORMATEX(muxer->streams[i]->wf);
          write_avi_chunk(f,ckidSTREAMFORMAT,wfsize,muxer->streams[i]->wf); /* WAVEFORMATEX */
          le2me_WAVEFORMATEX(muxer->streams[i]->wf);
}	  
	  break;
      }
  }

// ============= INFO ===============
// always include software info
info[0].id=mmioFOURCC('I','S','F','T'); // Software:
info[0].text="MEncoder " VERSION;
// include any optional strings
i=1;
if(info_name!=NULL){
  info[i].id=mmioFOURCC('I','N','A','M'); // Name:
  info[i++].text=info_name;
}
if(info_artist!=NULL){
  info[i].id=mmioFOURCC('I','A','R','T'); // Artist:
  info[i++].text=info_artist;
}
if(info_genre!=NULL){
  info[i].id=mmioFOURCC('I','G','N','R'); // Genre:
  info[i++].text=info_genre;
}
if(info_subject!=NULL){
  info[i].id=mmioFOURCC('I','S','B','J'); // Subject:
  info[i++].text=info_subject;
}
if(info_copyright!=NULL){
  info[i].id=mmioFOURCC('I','C','O','P'); // Copyright:
  info[i++].text=info_copyright;
}
if(info_sourceform!=NULL){
  info[i].id=mmioFOURCC('I','S','R','F'); // Source Form:
  info[i++].text=info_sourceform;
}
if(info_comment!=NULL){
  info[i].id=mmioFOURCC('I','C','M','T'); // Comment:
  info[i++].text=info_comment;
}
info[i].id=0;

  hdrsize=0;
  // calc info size:
  for(i=0;info[i].id!=0;i++) if(info[i].text){
      size_t sz=strlen(info[i].text)+1;
      hdrsize+=sz+8+sz%2;
  }
  // write infos:
  if (hdrsize!=0){
      write_avi_list(f,mmioFOURCC('I','N','F','O'),hdrsize);
      for(i=0;info[i].id!=0;i++) if(info[i].text){
          write_avi_chunk(f,info[i].id,strlen(info[i].text)+1,info[i].text);
      }
  }

  // JUNK:
  write_avi_chunk(f,ckidAVIPADDING,2048-(ftell(f)&2047)-8,NULL); /* junk */  
  // 'movi' header:
  write_avi_list(f,listtypeAVIMOVIE,muxer->movi_end-ftell(f)-12);
  muxer->movi_start=ftell(f);
}

static void avifile_write_index(muxer_t *muxer){
  muxer->movi_end=ftell(muxer->file);
  if(muxer->idx && muxer->idx_pos>0){
      int i;
      // fixup index entries:
//      for(i=0;i<muxer->idx_pos;i++) muxer->idx[i].dwChunkOffset-=muxer->movi_start-4;
      // write index chunk:
      for (i=0; i<muxer->idx_pos; i++) le2me_AVIINDEXENTRY((&muxer->idx[i]));
      write_avi_chunk(muxer->file,ckidAVINEWINDEX,16*muxer->idx_pos,muxer->idx); /* AVIINDEXENTRY */
      for (i=0; i<muxer->idx_pos; i++) le2me_AVIINDEXENTRY((&muxer->idx[i]));
      muxer->avih.dwFlags|=AVIF_HASINDEX;
  }
  muxer->file_end=ftell(muxer->file);
}

void muxer_init_muxer_avi(muxer_t *muxer){
  muxer->cont_new_stream = &avifile_new_stream;
  muxer->cont_write_chunk = &avifile_write_chunk;
  muxer->cont_write_header = &avifile_write_header;
  muxer->cont_write_index = &avifile_write_index;
}