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mpv/libmpdemux/muxer_avi.c

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C
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#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;
}
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