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#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"
#include "mpbswap.h"
#include "stream/stream.h"
#include "demuxer.h"
#include "stheader.h"
#include "libmpcodecs/vqf.h"
static int demux_probe_vqf(demuxer_t* demuxer)
{
char buf[KEYWORD_BYTES];
stream_t *s;
s = demuxer->stream;
if(stream_read(s,buf,KEYWORD_BYTES)!=KEYWORD_BYTES)
return 0;
if(memcmp(buf,"TWIN",KEYWORD_BYTES)==0) return DEMUXER_TYPE_VQF; /*version: 97012000*/
return 0;
}
static demuxer_t* demux_open_vqf(demuxer_t* demuxer) {
sh_audio_t* sh_audio;
WAVEFORMATEX* w;
stream_t *s;
headerInfo *hi;
s = demuxer->stream;
sh_audio = new_sh_audio(demuxer,0);
sh_audio->wf = w = malloc(sizeof(WAVEFORMATEX)+sizeof(headerInfo));
hi = (headerInfo *)&w[1];
memset(hi,0,sizeof(headerInfo));
w->wFormatTag = 0x1;
sh_audio->format = mmioFOURCC('T','W','I','N'); /* TWinVQ */
w->nChannels = sh_audio->channels = 2;
w->nSamplesPerSec = sh_audio->samplerate = 44100;
w->nAvgBytesPerSec = w->nSamplesPerSec*sh_audio->channels*2;
w->nBlockAlign = 0;
sh_audio->samplesize = 2;
w->wBitsPerSample = 8*sh_audio->samplesize;
w->cbSize = 0;
strcpy(hi->ID,"TWIN");
stream_read(s,hi->ID+KEYWORD_BYTES,VERSION_BYTES); /* fourcc+version_id */
while(1)
{
char chunk_id[4];
unsigned chunk_size;
hi->size=chunk_size=stream_read_dword(s); /* include itself */
stream_read(s,chunk_id,4);
if (chunk_size < 8) return NULL;
chunk_size -= 8;
if(AV_RL32(chunk_id)==mmioFOURCC('C','O','M','M'))
{
char buf[BUFSIZ];
unsigned i,subchunk_size;
if (chunk_size > sizeof(buf) || chunk_size < 20) return NULL;
if(stream_read(s,buf,chunk_size)!=chunk_size) return NULL;
i=0;
subchunk_size = AV_RB32(buf);
hi->channelMode = AV_RB32(buf + 4);
w->nChannels=sh_audio->channels=hi->channelMode+1; /*0-mono;1-stereo*/
hi->bitRate = AV_RB32(buf + 8);
sh_audio->i_bps=hi->bitRate*1000/8; /* bitrate kbit/s */
w->nAvgBytesPerSec = sh_audio->i_bps;
hi->samplingRate = AV_RB32(buf + 12);
switch(hi->samplingRate){
case 44:
w->nSamplesPerSec=44100;
break;
case 22:
w->nSamplesPerSec=22050;
break;
case 11:
w->nSamplesPerSec=11025;
break;
default:
w->nSamplesPerSec=hi->samplingRate*1000;
break;
}
sh_audio->samplerate=w->nSamplesPerSec;
hi->securityLevel = AV_RB32(buf + 16);
w->nBlockAlign = 0;
sh_audio->samplesize = 4;
w->wBitsPerSample = 8*sh_audio->samplesize;
w->cbSize = 0;
if (subchunk_size > chunk_size - 4) continue;
i+=subchunk_size+4;
while(i + 8 < chunk_size)
{
unsigned slen,sid;
char sdata[BUFSIZ];
sid = AV_RL32(buf + i); i+=4;
slen = AV_RB32(buf + i); i+=4;
if (slen > sizeof(sdata) - 1 || slen > chunk_size - i) break;
if(sid==mmioFOURCC('D','S','I','Z'))
{
hi->Dsiz=AV_RB32(buf + i);
continue; /* describes the same info as size of DATA chunk */
}
memcpy(sdata,&buf[i],slen); sdata[slen]=0; i+=slen;
if(sid==mmioFOURCC('N','A','M','E'))
{
memcpy(hi->Name,sdata,FFMIN(BUFSIZ,slen));
demux_info_add(demuxer,"Title",sdata);
}
else
if(sid==mmioFOURCC('A','U','T','H'))
{
memcpy(hi->Auth,sdata,FFMIN(BUFSIZ,slen));
demux_info_add(demuxer,"Author",sdata);
}
else
if(sid==mmioFOURCC('C','O','M','T'))
{
memcpy(hi->Comt,sdata,FFMIN(BUFSIZ,slen));
demux_info_add(demuxer,"Comment",sdata);
}
else
if(sid==mmioFOURCC('(','c',')',' '))
{
memcpy(hi->Cpyr,sdata,FFMIN(BUFSIZ,slen));
demux_info_add(demuxer,"Copyright",sdata);
}
else
if(sid==mmioFOURCC('F','I','L','E'))
{
memcpy(hi->File,sdata,FFMIN(BUFSIZ,slen));
}
else
if(sid==mmioFOURCC('A','L','B','M')) demux_info_add(demuxer,"Album",sdata);
else
if(sid==mmioFOURCC('Y','E','A','R')) demux_info_add(demuxer,"Date",sdata);
else
if(sid==mmioFOURCC('T','R','A','C')) demux_info_add(demuxer,"Track",sdata);
else
if(sid==mmioFOURCC('E','N','C','D')) demux_info_add(demuxer,"Encoder",sdata);
else
mp_msg(MSGT_DEMUX, MSGL_V, "Unhandled subchunk '%c%c%c%c'='%s'\n",((char *)&sid)[0],((char *)&sid)[1],((char *)&sid)[2],((char *)&sid)[3],sdata);
/* other stuff is unrecognized due untranslatable japan's idiomatics */
}
}
else
if(AV_RL32(chunk_id)==mmioFOURCC('D','A','T','A'))
{
demuxer->movi_start=stream_tell(s);
demuxer->movi_end=demuxer->movi_start+chunk_size;
mp_msg(MSGT_DEMUX, MSGL_V, "Found data at %"PRIX64" size %"PRIu64"\n",demuxer->movi_start,demuxer->movi_end);
/* Done! play it */
break;
}
else
{
mp_msg(MSGT_DEMUX, MSGL_V, "Unhandled chunk '%c%c%c%c' %u bytes\n",chunk_id[0],chunk_id[1],chunk_id[2],chunk_id[3],chunk_size);
stream_skip(s,chunk_size); /*unknown chunk type */
}
}
demuxer->audio->id = 0;
demuxer->audio->sh = sh_audio;
sh_audio->ds = demuxer->audio;
stream_seek(s,demuxer->movi_start);
demuxer->seekable=0;
return demuxer;
}
static int demux_vqf_fill_buffer(demuxer_t* demuxer, demux_stream_t *ds) {
sh_audio_t* sh_audio = demuxer->audio->sh;
int l = sh_audio->wf->nAvgBytesPerSec;
off_t spos = stream_tell(demuxer->stream);
demux_packet_t* dp;
if(stream_eof(demuxer->stream))
return 0;
dp = new_demux_packet(l);
ds->pts = spos / (float)(sh_audio->wf->nAvgBytesPerSec);
ds->pos = spos;
l=stream_read(demuxer->stream,dp->buffer,l);
resize_demux_packet(dp,l);
ds_add_packet(ds,dp);
return 1;
}
static void demux_seek_vqf(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
#if 0
stream_t* s = demuxer->stream;
sh_audio_t* sh_audio = demuxer->audio->sh;
off_t base,pos;
base = (flags & SEEK_ABSOLUTE) ? demuxer->movi_start : stream_tell(s);
if(flags & SEEK_FACTOR)
pos = base + ((demuxer->movi_end - demuxer->movi_start)*rel_seek_secs);
else
pos = base + (rel_seek_secs*sh_audio->i_bps);
pos -= (pos % (sh_audio->channels * sh_audio->samplesize) );
stream_seek(s,pos);
#endif
}
static void demux_close_vqf(demuxer_t* demuxer) {}
const demuxer_desc_t demuxer_desc_vqf = {
"TwinVQ demuxer",
"vqf",
"VQF",
"Nick Kurshev",
"ported frm MPlayerXP",
DEMUXER_TYPE_VQF,
1, // safe autodetect
demux_probe_vqf,
demux_vqf_fill_buffer,
demux_open_vqf,
demux_close_vqf,
demux_seek_vqf,
NULL
};
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