libmpdemux/demux_vqf.c

   1 #include "config.h"
   2
   3 #include <stdlib.h>
   4 #include <stdio.h>
   5 #include "libavutil/common.h"
   6 #include "mpbswap.h"
   7
   8 #include "stream/stream.h"
   9 #include "demuxer.h"
  10 #include "stheader.h"
  11 #include "libmpcodecs/vqf.h"
  12
  13 static int demux_probe_vqf(demuxer_t* demuxer)
  14 {
  15   char buf[KEYWORD_BYTES];
  16   stream_t *s;
  17   s = demuxer->stream;
  18   if(stream_read(s,buf,KEYWORD_BYTES)!=KEYWORD_BYTES)
  19     return 0;
  20   if(memcmp(buf,"TWIN",KEYWORD_BYTES)==0) return DEMUXER_TYPE_VQF; /*version: 97012000*/
  21   return 0;
  22 }
  23
  24 static demuxer_t* demux_open_vqf(demuxer_t* demuxer) {
  25   sh_audio_t* sh_audio;
  26   WAVEFORMATEX* w;
  27   stream_t *s;
  28   headerInfo *hi;
  29
  30   s = demuxer->stream;
  31
  32   sh_audio = new_sh_audio(demuxer,0);
  33   sh_audio->wf = w = malloc(sizeof(WAVEFORMATEX)+sizeof(headerInfo));
  34   hi = (headerInfo *)&w[1];
  35   memset(hi,0,sizeof(headerInfo));
  36   w->wFormatTag = 0x1;
  37   sh_audio->format = mmioFOURCC('T','W','I','N'); /* TWinVQ */
  38   w->nChannels = sh_audio->channels = 2;
  39   w->nSamplesPerSec = sh_audio->samplerate = 44100;
  40   w->nAvgBytesPerSec = w->nSamplesPerSec*sh_audio->channels*2;
  41   w->nBlockAlign = 0;
  42   sh_audio->samplesize = 2;
  43   w->wBitsPerSample = 8*sh_audio->samplesize;
  44   w->cbSize = 0;
  45   strcpy(hi->ID,"TWIN");
  46   stream_read(s,hi->ID+KEYWORD_BYTES,VERSION_BYTES); /* fourcc+version_id */
  47   while(1)
  48   {
  49     char chunk_id[4];
  50     unsigned chunk_size;
  51     hi->size=chunk_size=stream_read_dword(s); /* include itself */
  52     stream_read(s,chunk_id,4);
  53     if(*((uint32_t *)&chunk_id[0])==mmioFOURCC('C','O','M','M'))
  54     {
  55     char buf[chunk_size-8];
  56     unsigned i,subchunk_size;
  57     if(stream_read(s,buf,chunk_size-8)!=chunk_size-8) return NULL;
  58     i=0;
  59     subchunk_size=be2me_32(*((uint32_t *)&buf[0]));
  60     hi->channelMode=be2me_32(*((uint32_t *)&buf[4]));
  61     w->nChannels=sh_audio->channels=hi->channelMode+1; /*0-mono;1-stereo*/
  62     hi->bitRate=be2me_32(*((uint32_t *)&buf[8]));
  63     sh_audio->i_bps=hi->bitRate*1000/8; /* bitrate kbit/s */
  64     w->nAvgBytesPerSec = sh_audio->i_bps;
  65     hi->samplingRate=be2me_32(*((uint32_t *)&buf[12]));
  66     switch(hi->samplingRate){
  67     case 44:
  68         w->nSamplesPerSec=44100;
  69         break;
  70     case 22:
  71         w->nSamplesPerSec=22050;
  72         break;
  73     case 11:
  74         w->nSamplesPerSec=11025;
  75         break;
  76     default:
  77         w->nSamplesPerSec=hi->samplingRate*1000;
  78         break;
  79     }
  80     sh_audio->samplerate=w->nSamplesPerSec;
  81     hi->securityLevel=be2me_32(*((uint32_t *)&buf[16]));
  82     w->nBlockAlign = 0;
  83     sh_audio->samplesize = 4;
  84     w->wBitsPerSample = 8*sh_audio->samplesize;
  85     w->cbSize = 0;
  86     i+=subchunk_size+4;
  87     while(i<chunk_size-8)
  88     {
  89         unsigned slen,sid;
  90         char sdata[chunk_size];
  91         sid=*((uint32_t *)&buf[i]); i+=4;
  92         slen=be2me_32(*((uint32_t *)&buf[i])); i+=4;
  93         if(sid==mmioFOURCC('D','S','I','Z'))
  94         {
  95         hi->Dsiz=be2me_32(*((uint32_t *)&buf[i]));
  96         continue; /* describes the same info as size of DATA chunk */
  97         }
  98         memcpy(sdata,&buf[i],slen); sdata[slen]=0; i+=slen;
  99         if(sid==mmioFOURCC('N','A','M','E'))
 100         {
 101         memcpy(hi->Name,sdata,FFMIN(BUFSIZ,slen));
 102         demux_info_add(demuxer,"Title",sdata);
 103         }
 104         else
 105         if(sid==mmioFOURCC('A','U','T','H'))
 106         {
 107         memcpy(hi->Auth,sdata,FFMIN(BUFSIZ,slen));
 108         demux_info_add(demuxer,"Author",sdata);
 109         }
 110         else
 111         if(sid==mmioFOURCC('C','O','M','T'))
 112         {
 113         memcpy(hi->Comt,sdata,FFMIN(BUFSIZ,slen));
 114         demux_info_add(demuxer,"Comment",sdata);
 115         }
 116         else
 117         if(sid==mmioFOURCC('(','c',')',' '))
 118         {
 119         memcpy(hi->Cpyr,sdata,FFMIN(BUFSIZ,slen));
 120         demux_info_add(demuxer,"Copyright",sdata);
 121         }
 122         else
 123         if(sid==mmioFOURCC('F','I','L','E'))
 124         {
 125         memcpy(hi->File,sdata,FFMIN(BUFSIZ,slen));
 126         }
 127         else
 128         if(sid==mmioFOURCC('A','L','B','M')) demux_info_add(demuxer,"Album",sdata);
 129         else
 130         if(sid==mmioFOURCC('Y','E','A','R')) demux_info_add(demuxer,"Date",sdata);
 131         else
 132         if(sid==mmioFOURCC('T','R','A','C')) demux_info_add(demuxer,"Track",sdata);
 133         else
 134         if(sid==mmioFOURCC('E','N','C','D')) demux_info_add(demuxer,"Encoder",sdata);
 135         else
 136         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);
 137         /* other stuff is unrecognized due untranslatable japan's idiomatics */
 138     }
 139     }
 140     else
 141     if(*((uint32_t *)&chunk_id[0])==mmioFOURCC('D','A','T','A'))
 142     {
 143     demuxer->movi_start=stream_tell(s);
 144     demuxer->movi_end=demuxer->movi_start+chunk_size-8;
 145     mp_msg(MSGT_DEMUX, MSGL_V, "Found data at %"PRIX64" size %"PRIu64"\n",demuxer->movi_start,demuxer->movi_end);
 146     /* Done! play it */
 147     break;
 148     }
 149     else
 150     {
 151     mp_msg(MSGT_DEMUX, MSGL_V, "Unhandled chunk '%c%c%c%c' %u bytes\n",((char *)&chunk_id)[0],((char *)&chunk_id)[1],((char *)&chunk_id)[2],((char *)&chunk_id)[3],chunk_size);
 152     stream_skip(s,chunk_size-8); /*unknown chunk type */
 153     }
 154   }
 155
 156   demuxer->audio->id = 0;
 157   demuxer->audio->sh = sh_audio;
 158   sh_audio->ds = demuxer->audio;
 159   stream_seek(s,demuxer->movi_start);
 160   demuxer->seekable=0;
 161   return demuxer;
 162 }
 163
 164 static int demux_vqf_fill_buffer(demuxer_t* demuxer, demux_stream_t *ds) {
 165   sh_audio_t* sh_audio = demuxer->audio->sh;
 166   int l = sh_audio->wf->nAvgBytesPerSec;
 167   off_t spos = stream_tell(demuxer->stream);
 168   demux_packet_t*  dp;
 169
 170   if(stream_eof(demuxer->stream))
 171     return 0;
 172
 173   dp = new_demux_packet(l);
 174   ds->pts = spos / (float)(sh_audio->wf->nAvgBytesPerSec);
 175   ds->pos = spos;
 176
 177   l=stream_read(demuxer->stream,dp->buffer,l);
 178   resize_demux_packet(dp,l);
 179   ds_add_packet(ds,dp);
 180
 181   return 1;
 182 }
 183
 184 static void demux_seek_vqf(demuxer_t *demuxer,float rel_seek_secs,float audio_delay,int flags){
 185 #if 0
 186   stream_t* s = demuxer->stream;
 187   sh_audio_t* sh_audio = demuxer->audio->sh;
 188   off_t base,pos;
 189
 190   base = (flags & SEEK_ABSOLUTE) ? demuxer->movi_start : stream_tell(s);
 191   if(flags & SEEK_FACTOR)
 192     pos = base + ((demuxer->movi_end - demuxer->movi_start)*rel_seek_secs);
 193   else
 194     pos = base + (rel_seek_secs*sh_audio->i_bps);
 195
 196   pos -= (pos % (sh_audio->channels * sh_audio->samplesize) );
 197   stream_seek(s,pos);
 198 #endif
 199 }
 200
 201 static void demux_close_vqf(demuxer_t* demuxer) {}
 202
 203
 204 const demuxer_desc_t demuxer_desc_vqf = {
 205   "TwinVQ demuxer",
 206   "vqf",
 207   "VQF",
 208   "Nick Kurshev",
 209   "ported frm MPlayerXP",
 210   DEMUXER_TYPE_VQF,
 211   1, // safe autodetect
 212   demux_probe_vqf,
 213   demux_vqf_fill_buffer,
 214   demux_open_vqf,
 215   demux_close_vqf,
 216   demux_seek_vqf,
 217   NULL
 218 };