libmpdemux/video.c

   1 /*
   2  * video frame reading
   3  *
   4  * This file is part of MPlayer.
   5  *
   6  * MPlayer is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * MPlayer is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with MPlayer; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 #include "config.h"
  22
  23 #include <stdio.h>
  24 #if HAVE_MALLOC_H
  25 #include <malloc.h>
  26 #endif
  27 #include <stdlib.h>
  28 #include <string.h>
  29 #include <unistd.h>
  30
  31 #include "mp_msg.h"
  32 #include "help_mp.h"
  33
  34 #include "stream/stream.h"
  35 #include "demuxer.h"
  36 #include "stheader.h"
  37 #include "parse_es.h"
  38 #include "mpeg_hdr.h"
  39
  40 /* sub_cc (closed captions)*/
  41 #include "sub_cc.h"
  42
  43 /* biCompression constant */
  44 #define BI_RGB        0L
  45
  46 #ifdef CONFIG_LIVE555
  47 #include "demux_rtp.h"
  48 #endif
  49
  50 static mp_mpeg_header_t picture;
  51
  52 static int telecine=0;
  53 static float telecine_cnt=-2.5;
  54
  55 typedef enum {
  56   VIDEO_MPEG12,
  57   VIDEO_MPEG4,
  58   VIDEO_H264,
  59   VIDEO_VC1,
  60   VIDEO_OTHER
  61 } video_codec_t;
  62
  63 static video_codec_t find_video_codec(sh_video_t *sh_video)
  64 {
  65   demux_stream_t *d_video=sh_video->ds;
  66   int fmt = d_video->demuxer->file_format;
  67
  68   if(
  69     (fmt == DEMUXER_TYPE_PVA) ||
  70     (fmt == DEMUXER_TYPE_MPEG_ES) ||
  71     (fmt == DEMUXER_TYPE_MPEG_GXF) ||
  72     (fmt == DEMUXER_TYPE_MPEG_PES) ||
  73     (
  74       (fmt == DEMUXER_TYPE_MPEG_PS || fmt == DEMUXER_TYPE_MPEG_TS) &&
  75       ((! sh_video->format) || (sh_video->format==0x10000001) || (sh_video->format==0x10000002))
  76     ) ||
  77     (fmt == DEMUXER_TYPE_MPEG_TY)
  78 #ifdef CONFIG_LIVE555
  79     || ((fmt == DEMUXER_TYPE_RTP) && demux_is_mpeg_rtp_stream(d_video->demuxer))
  80 #endif
  81   )
  82     return VIDEO_MPEG12;
  83   else if((fmt == DEMUXER_TYPE_MPEG4_ES) ||
  84     ((fmt == DEMUXER_TYPE_MPEG_TS) && (sh_video->format==0x10000004)) ||
  85     ((fmt == DEMUXER_TYPE_MPEG_PS) && (sh_video->format==0x10000004))
  86   )
  87     return VIDEO_MPEG4;
  88   else if((fmt == DEMUXER_TYPE_H264_ES) ||
  89     ((fmt == DEMUXER_TYPE_MPEG_TS) && (sh_video->format==0x10000005)) ||
  90     ((fmt == DEMUXER_TYPE_MPEG_PS) && (sh_video->format==0x10000005))
  91   )
  92     return VIDEO_H264;
  93   else if((fmt == DEMUXER_TYPE_MPEG_PS ||  fmt == DEMUXER_TYPE_MPEG_TS) &&
  94     (sh_video->format==mmioFOURCC('W', 'V', 'C', '1')))
  95     return VIDEO_VC1;
  96   else if (fmt == DEMUXER_TYPE_ASF && sh_video->bih && sh_video->bih->biCompression == mmioFOURCC('D', 'V', 'R', ' '))
  97     return VIDEO_MPEG12;
  98   else
  99     return VIDEO_OTHER;
 100 }
 101
 102 int video_read_properties(sh_video_t *sh_video){
 103 demux_stream_t *d_video=sh_video->ds;
 104 video_codec_t video_codec = find_video_codec(sh_video);
 105 // Determine image properties:
 106 switch(video_codec){
 107  case VIDEO_OTHER: {
 108  if((d_video->demuxer->file_format == DEMUXER_TYPE_ASF) || (d_video->demuxer->file_format == DEMUXER_TYPE_AVI)) {
 109     // display info:
 110     // in case no strf chunk has been seen in avi, we have no bitmap header
 111     if(!sh_video->bih) return 0;
 112     sh_video->format=sh_video->bih->biCompression;
 113     sh_video->disp_w=sh_video->bih->biWidth;
 114     sh_video->disp_h=abs(sh_video->bih->biHeight);
 115   }
 116   break;
 117  }
 118  case VIDEO_MPEG4: {
 119    int pos = 0, vop_cnt=0, units[3];
 120    videobuf_len=0; videobuf_code_len=0;
 121    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for Video Object Start code... ");
 122    while(1){
 123       int i=sync_video_packet(d_video);
 124       if(i<=0x11F) break; // found it!
 125       if(!i || !skip_video_packet(d_video)){
 126         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 127         return 0;
 128       }
 129    }
 130    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 131    if(!videobuffer) {
 132      videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE + MP_INPUT_BUFFER_PADDING_SIZE);
 133      if (videobuffer) memset(videobuffer+VIDEOBUFFER_SIZE, 0, MP_INPUT_BUFFER_PADDING_SIZE);
 134      else {
 135        mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_ShMemAllocFail);
 136        return 0;
 137      }
 138    }
 139    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for Video Object Layer Start code... ");
 140    while(1){
 141       int i=sync_video_packet(d_video);
 142       mp_msg(MSGT_DECVIDEO,MSGL_V,"M4V: 0x%X\n",i);
 143       if(i>=0x120 && i<=0x12F) break; // found it!
 144       if(!i || !read_video_packet(d_video)){
 145         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 146         return 0;
 147       }
 148    }
 149    pos = videobuf_len+4;
 150    if(!read_video_packet(d_video)){
 151      mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Can't read Video Object Layer Header\n");
 152      return 0;
 153    }
 154    mp4_header_process_vol(&picture, &(videobuffer[pos]));
 155    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK! FPS SEEMS TO BE %.3f\nSearching for Video Object Plane Start code... ", sh_video->fps);
 156  mp4_init:
 157    while(1){
 158       int i=sync_video_packet(d_video);
 159       if(i==0x1B6) break; // found it!
 160       if(!i || !read_video_packet(d_video)){
 161         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 162         return 0;
 163       }
 164    }
 165    pos = videobuf_len+4;
 166    if(!read_video_packet(d_video)){
 167      mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Can't read Video Object Plane Header\n");
 168      return 0;
 169    }
 170    mp4_header_process_vop(&picture, &(videobuffer[pos]));
 171    units[vop_cnt] = picture.timeinc_unit;
 172    vop_cnt++;
 173    //mp_msg(MSGT_DECVIDEO,MSGL_V, "TYPE: %d, unit: %d\n", picture.picture_type, picture.timeinc_unit);
 174    if(!picture.fps) {
 175      int i, mn, md, mx, diff;
 176      if(vop_cnt < 3)
 177           goto mp4_init;
 178
 179      i=0;
 180      mn = mx = units[0];
 181      for(i=0; i<3; i++) {
 182        if(units[i] < mn)
 183          mn = units[i];
 184        if(units[i] > mx)
 185          mx = units[i];
 186      }
 187      md = mn;
 188      for(i=0; i<3; i++) {
 189        if((units[i] > mn) && (units[i] < mx))
 190          md = units[i];
 191      }
 192      mp_msg(MSGT_DECVIDEO,MSGL_V, "MIN: %d, mid: %d, max: %d\n", mn, md, mx);
 193      if(mx - md > md - mn)
 194        diff = md - mn;
 195      else
 196        diff = mx - md;
 197      if(diff > 0){
 198        picture.fps = ((float)picture.timeinc_resolution) / diff;
 199        mp_msg(MSGT_DECVIDEO,MSGL_V, "FPS seems to be: %f, resolution: %d, delta_units: %d\n", picture.fps, picture.timeinc_resolution, diff);
 200      }
 201    }
 202    if(picture.fps) {
 203     sh_video->fps=picture.fps;
 204     sh_video->frametime=1.0/picture.fps;
 205     mp_msg(MSGT_DECVIDEO,MSGL_INFO, "FPS seems to be: %f\n", picture.fps);
 206    }
 207    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 208    sh_video->format=0x10000004;
 209    break;
 210  }
 211  case VIDEO_H264: {
 212    int pos = 0;
 213    videobuf_len=0; videobuf_code_len=0;
 214    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for sequence parameter set... ");
 215    while(1){
 216       int i=sync_video_packet(d_video);
 217       if((i&~0x60) == 0x107 && i != 0x107) break; // found it!
 218       if(!i || !skip_video_packet(d_video)){
 219         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 220         return 0;
 221       }
 222    }
 223    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 224    if(!videobuffer) {
 225      videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE + MP_INPUT_BUFFER_PADDING_SIZE);
 226      if (videobuffer) memset(videobuffer+VIDEOBUFFER_SIZE, 0, MP_INPUT_BUFFER_PADDING_SIZE);
 227      else {
 228        mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_ShMemAllocFail);
 229        return 0;
 230      }
 231    }
 232    pos = videobuf_len+4;
 233    if(!read_video_packet(d_video)){
 234      mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Can't read sequence parameter set\n");
 235      return 0;
 236    }
 237    h264_parse_sps(&picture, &(videobuffer[pos]), videobuf_len - pos);
 238    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for picture parameter set... ");
 239    while(1){
 240       int i=sync_video_packet(d_video);
 241       mp_msg(MSGT_DECVIDEO,MSGL_V,"H264: 0x%X\n",i);
 242       if((i&~0x60) == 0x108 && i != 0x108) break; // found it!
 243       if(!i || !read_video_packet(d_video)){
 244         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 245         return 0;
 246       }
 247    }
 248    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\nSearching for Slice... ");
 249    while(1){
 250       int i=sync_video_packet(d_video);
 251       if((i&~0x60) == 0x101 || (i&~0x60) == 0x102 || (i&~0x60) == 0x105) break; // found it!
 252       if(!i || !read_video_packet(d_video)){
 253         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 254         return 0;
 255       }
 256    }
 257    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 258    sh_video->format=0x10000005;
 259    if(picture.fps) {
 260      sh_video->fps=picture.fps;
 261      sh_video->frametime=1.0/picture.fps;
 262      mp_msg(MSGT_DECVIDEO,MSGL_INFO, "FPS seems to be: %f\n", picture.fps);
 263    }
 264    break;
 265  }
 266  case VIDEO_MPEG12: {
 267    if (d_video->demuxer->file_format == DEMUXER_TYPE_ASF) { // DVR-MS
 268      if(!sh_video->bih) return 0;
 269      sh_video->format=sh_video->bih->biCompression;
 270    }
 271 mpeg_header_parser:
 272    // Find sequence_header first:
 273    videobuf_len=0; videobuf_code_len=0;
 274    telecine=0; telecine_cnt=-2.5;
 275    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for sequence header... ");
 276    while(1){
 277       int i=sync_video_packet(d_video);
 278       if(i==0x1B3) break; // found it!
 279       if(!i || !skip_video_packet(d_video)){
 280         if( mp_msg_test(MSGT_DECVIDEO,MSGL_V) )  mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 281         mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_MpegNoSequHdr);
 282         return 0;
 283       }
 284    }
 285    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 286    // ========= Read & process sequence header & extension ============
 287    if(!videobuffer) {
 288      videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE + MP_INPUT_BUFFER_PADDING_SIZE);
 289      if (videobuffer) memset(videobuffer+VIDEOBUFFER_SIZE, 0, MP_INPUT_BUFFER_PADDING_SIZE);
 290      else {
 291        mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_ShMemAllocFail);
 292        return 0;
 293      }
 294    }
 295
 296    if(!read_video_packet(d_video)){
 297      mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_CannotReadMpegSequHdr);
 298      return 0;
 299    }
 300    if(mp_header_process_sequence_header (&picture, &videobuffer[4])) {
 301      mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_BadMpegSequHdr);
 302      goto mpeg_header_parser;
 303    }
 304    if(sync_video_packet(d_video)==0x1B5){ // next packet is seq. ext.
 305     int pos=videobuf_len;
 306     if(!read_video_packet(d_video)){
 307       mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_CannotReadMpegSequHdrEx);
 308       return 0;
 309     }
 310     if(mp_header_process_extension (&picture, &videobuffer[pos+4])) {
 311       mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_BadMpegSequHdrEx);
 312       return 0;
 313     }
 314    }
 315
 316    // display info:
 317    sh_video->format=picture.mpeg1?0x10000001:0x10000002; // mpeg video
 318    sh_video->fps=picture.fps;
 319    if(!sh_video->fps){
 320      sh_video->frametime=0;
 321    } else {
 322      sh_video->frametime=1.0/picture.fps;
 323    }
 324    sh_video->disp_w=picture.display_picture_width;
 325    sh_video->disp_h=picture.display_picture_height;
 326    // bitrate:
 327    if(picture.bitrate!=0x3FFFF) // unspecified/VBR ?
 328        sh_video->i_bps=picture.bitrate * 400 / 8;
 329    // info:
 330    mp_dbg(MSGT_DECVIDEO,MSGL_DBG2,"mpeg bitrate: %d (%X)\n",picture.bitrate,picture.bitrate);
 331    mp_msg(MSGT_DECVIDEO,MSGL_INFO,"VIDEO:  %s  %dx%d  (aspect %d)  %5.3f fps  %5.1f kbps (%4.1f kbyte/s)\n",
 332     picture.mpeg1?"MPEG1":"MPEG2",
 333     sh_video->disp_w,sh_video->disp_h,
 334     picture.aspect_ratio_information,
 335     sh_video->fps,
 336     sh_video->i_bps * 8 / 1000.0,
 337     sh_video->i_bps / 1000.0 );
 338   break;
 339  }
 340  case VIDEO_VC1: {
 341    // Find sequence_header:
 342    videobuf_len=0;
 343    videobuf_code_len=0;
 344    mp_msg(MSGT_DECVIDEO,MSGL_INFO,"Searching for VC1 sequence header... ");
 345    while(1){
 346       int i=sync_video_packet(d_video);
 347       if(i==0x10F) break; // found it!
 348       if(!i || !skip_video_packet(d_video)){
 349         if( mp_msg_test(MSGT_DECVIDEO,MSGL_V) )  mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 350         mp_msg(MSGT_DECVIDEO,MSGL_ERR, "Couldn't find VC-1 sequence header\n");
 351         return 0;
 352       }
 353    }
 354    mp_msg(MSGT_DECVIDEO,MSGL_INFO,"found\n");
 355    if(!videobuffer) {
 356      videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE + MP_INPUT_BUFFER_PADDING_SIZE);
 357      if (videobuffer) memset(videobuffer+VIDEOBUFFER_SIZE, 0, MP_INPUT_BUFFER_PADDING_SIZE);
 358      else {
 359        mp_msg(MSGT_DECVIDEO,MSGL_ERR,MSGTR_ShMemAllocFail);
 360        return 0;
 361      }
 362    }
 363    if(!read_video_packet(d_video)){
 364      mp_msg(MSGT_DECVIDEO,MSGL_ERR, "Couldn't read VC-1 sequence header!\n");
 365      return 0;
 366    }
 367
 368    while(1) {
 369       int i=sync_video_packet(d_video);
 370       if(i==0x10E) break; // found it!
 371       if(!i || !skip_video_packet(d_video)){
 372         mp_msg(MSGT_DECVIDEO,MSGL_V,"Couldn't find VC-1 entry point sync-code:(\n");
 373         return 0;
 374       }
 375    }
 376    if(!read_video_packet(d_video)){
 377       mp_msg(MSGT_DECVIDEO,MSGL_V,"Couldn't read VC-1 entry point sync-code:(\n");
 378       return 0;
 379    }
 380
 381    if(mp_vc1_decode_sequence_header(&picture, &videobuffer[4], videobuf_len-4)) {
 382      sh_video->bih = (BITMAPINFOHEADER *) calloc(1, sizeof(BITMAPINFOHEADER) + videobuf_len);
 383      if(sh_video->bih == NULL) {
 384        mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Couldn't alloc %d bytes for VC-1 extradata!\n", sizeof(BITMAPINFOHEADER) + videobuf_len);
 385        return 0;
 386      }
 387      sh_video->bih->biSize= sizeof(BITMAPINFOHEADER) + videobuf_len;
 388      memcpy(sh_video->bih + 1, videobuffer, videobuf_len);
 389      sh_video->bih->biCompression = sh_video->format;
 390      sh_video->bih->biWidth = sh_video->disp_w = picture.display_picture_width;
 391      sh_video->bih->biHeight = sh_video->disp_h = picture.display_picture_height;
 392      if(picture.fps > 0) {
 393        sh_video->frametime=1.0/picture.fps;
 394        sh_video->fps = picture.fps;
 395      }
 396      mp_msg(MSGT_DECVIDEO,MSGL_INFO,"VIDEO:  VC-1  %dx%d, %5.3f fps, header len: %d\n",
 397        sh_video->disp_w, sh_video->disp_h, sh_video->fps, videobuf_len);
 398    }
 399   break;
 400  }
 401 } // switch(file_format)
 402
 403 return 1;
 404 }
 405
 406 void ty_processuserdata( unsigned char* buf, int len );
 407
 408 static void process_userdata(unsigned char* buf,int len){
 409     int i;
 410     /* if the user data starts with "CC", assume it is a CC info packet */
 411     if(len>2 && buf[0]=='C' && buf[1]=='C'){
 412 //    mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"video.c: process_userdata() detected Closed Captions!\n");
 413       subcc_process_data(buf+2,len-2);
 414     }
 415     if( len > 2 && buf[ 0 ] == 'T' && buf[ 1 ] == 'Y' )
 416     {
 417        ty_processuserdata( buf + 2, len - 2 );
 418        return;
 419     }
 420     if(verbose<2) return;
 421     fprintf(stderr, "user_data: len=%3d  %02X %02X %02X %02X '",
 422       len, buf[0], buf[1], buf[2], buf[3]);
 423     for(i=0;i<len;i++)
 424 //    if(buf[i]>=32 && buf[i]<127) fputc(buf[i], stderr);
 425       if(buf[i]&0x60) fputc(buf[i]&0x7F, stderr);
 426     fprintf(stderr, "'\n");
 427 }
 428
 429 int video_read_frame(sh_video_t* sh_video,float* frame_time_ptr,unsigned char** start,int force_fps){
 430     demux_stream_t *d_video=sh_video->ds;
 431     demuxer_t *demuxer=d_video->demuxer;
 432     float frame_time=1;
 433     float pts1=d_video->pts;
 434     float pts=0;
 435     int picture_coding_type=0;
 436     int in_size=0;
 437     video_codec_t video_codec = find_video_codec(sh_video);
 438
 439     *start=NULL;
 440
 441   if(video_codec == VIDEO_MPEG12){
 442         int in_frame=0;
 443         //float newfps;
 444         //videobuf_len=0;
 445         while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
 446           int i=sync_video_packet(d_video);
 447           //void* buffer=&videobuffer[videobuf_len+4];
 448           int start=videobuf_len+4;
 449           if(in_frame){
 450             if(i<0x101 || i>=0x1B0){  // not slice code -> end of frame
 451               if(!i) return -1; // EOF
 452               break;
 453             }
 454           } else {
 455             if(i==0x100){
 456               pts=d_video->pts;
 457               d_video->pts=0;
 458             }
 459             if(i>=0x101 && i<0x1B0) in_frame=1; // picture startcode
 460             else if(!i) return -1; // EOF
 461           }
 462           if(!read_video_packet(d_video)) return -1; // EOF
 463           // process headers:
 464           switch(i){
 465             case 0x1B3: mp_header_process_sequence_header (&picture, &videobuffer[start]);break;
 466             case 0x1B5: mp_header_process_extension (&picture, &videobuffer[start]);break;
 467             case 0x1B2: process_userdata (&videobuffer[start], videobuf_len-start);break;
 468             case 0x100: picture_coding_type=(videobuffer[start+1] >> 3) & 7;break;
 469           }
 470         }
 471
 472         *start=videobuffer; in_size=videobuf_len;
 473
 474     // get mpeg fps:
 475     if(sh_video->fps!=picture.fps) if(!force_fps && !telecine){
 476             mp_msg(MSGT_CPLAYER,MSGL_WARN,"Warning! FPS changed %5.3f -> %5.3f  (%f) [%d]  \n",sh_video->fps,picture.fps,sh_video->fps-picture.fps,picture.frame_rate_code);
 477             sh_video->fps=picture.fps;
 478             sh_video->frametime=1.0/picture.fps;
 479     }
 480
 481     // fix mpeg2 frametime:
 482     frame_time=(picture.display_time)*0.01f;
 483     picture.display_time=100;
 484     videobuf_len=0;
 485
 486     telecine_cnt*=0.9; // drift out error
 487     telecine_cnt+=frame_time-5.0/4.0;
 488     mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"\r telecine = %3.1f  %5.3f     \n",frame_time,telecine_cnt);
 489
 490     if(telecine){
 491         frame_time=1;
 492         if(telecine_cnt<-1.5 || telecine_cnt>1.5){
 493             mp_msg(MSGT_DECVIDEO,MSGL_INFO,MSGTR_LeaveTelecineMode);
 494             telecine=0;
 495         }
 496     } else
 497         if(telecine_cnt>-0.5 && telecine_cnt<0.5 && !force_fps){
 498             sh_video->fps=sh_video->fps*4/5;
 499             sh_video->frametime=sh_video->frametime*5/4;
 500             mp_msg(MSGT_DECVIDEO,MSGL_INFO,MSGTR_EnterTelecineMode);
 501             telecine=1;
 502         }
 503   } else if(video_codec == VIDEO_MPEG4){
 504         while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
 505           int i=sync_video_packet(d_video);
 506           if(!i) return -1;
 507           if(!read_video_packet(d_video)) return -1; // EOF
 508           if(i==0x1B6) break;
 509         }
 510         *start=videobuffer; in_size=videobuf_len;
 511         videobuf_len=0;
 512   } else if(video_codec == VIDEO_H264){
 513         int in_picture = 0;
 514         while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
 515           int i=sync_video_packet(d_video);
 516           int pos = videobuf_len+4;
 517           if(!i) return -1;
 518           if(!read_video_packet(d_video)) return -1; // EOF
 519           if((i&~0x60) == 0x107 && i != 0x107) {
 520             h264_parse_sps(&picture, &(videobuffer[pos]), videobuf_len - pos);
 521             if(picture.fps > 0) {
 522               sh_video->fps=picture.fps;
 523               sh_video->frametime=1.0/picture.fps;
 524             }
 525             i=sync_video_packet(d_video);
 526             if(!i) return -1;
 527             if(!read_video_packet(d_video)) return -1; // EOF
 528           }
 529
 530           // here starts the access unit end detection code
 531           // see the mail on MPlayer-dev-eng for details:
 532           // Date: Sat, 17 Sep 2005 11:24:06 +0200
 533           // Subject: Re: [MPlayer-dev-eng] [RFC] h264 ES parser problems
 534           // Message-ID: <20050917092406.GA7699@rz.uni-karlsruhe.de>
 535           if((i&~0x60) == 0x101 || (i&~0x60) == 0x102 || (i&~0x60) == 0x105)
 536             // found VCL NAL with slice header i.e. start of current primary coded
 537             // picture, so start scanning for the end now
 538             in_picture = 1;
 539           if (in_picture) {
 540             i = sync_video_packet(d_video) & ~0x60; // code of next packet
 541             if(i == 0x106 || i == 0x109) break; // SEI or access unit delim.
 542             if(i == 0x101 || i == 0x102 || i == 0x105) {
 543               // assuming arbitrary slice ordering is not allowed, the
 544               // first_mb_in_slice (golomb encoded) value should be 0 then
 545               // for the first VCL NAL in a picture
 546               if (demux_peekc(d_video) & 0x80)
 547                 break;
 548             }
 549           }
 550         }
 551         *start=videobuffer; in_size=videobuf_len;
 552         videobuf_len=0;
 553   }  else if(video_codec == VIDEO_VC1) {
 554        while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE) {
 555          int i=sync_video_packet(d_video);
 556          if(!i) return -1;
 557          if(!read_video_packet(d_video)) return -1; // EOF
 558          if(i==0x10D) break;
 559        }
 560        *start=videobuffer;
 561        in_size=videobuf_len;
 562        videobuf_len=0;
 563   } else {
 564       // frame-based file formats: (AVI,ASF,MOV)
 565     in_size=ds_get_packet(d_video,start);
 566     if(in_size<0) return -1; // EOF
 567   }
 568
 569
 570 //------------------------ frame decoded. --------------------
 571
 572     // Increase video timers:
 573     sh_video->num_frames+=frame_time;
 574     ++sh_video->num_frames_decoded;
 575
 576     frame_time*=sh_video->frametime;
 577
 578     // override frame_time for variable/unknown FPS formats:
 579     if(!force_fps) switch(demuxer->file_format){
 580       case DEMUXER_TYPE_GIF:
 581       case DEMUXER_TYPE_MATROSKA:
 582       case DEMUXER_TYPE_MNG:
 583        if(d_video->pts>0 && pts1>0 && d_video->pts>pts1)
 584          frame_time=d_video->pts-pts1;
 585         break;
 586       case DEMUXER_TYPE_TV:
 587       case DEMUXER_TYPE_MOV:
 588       case DEMUXER_TYPE_FILM:
 589       case DEMUXER_TYPE_VIVO:
 590       case DEMUXER_TYPE_OGG:
 591       case DEMUXER_TYPE_ASF: {
 592         double next_pts = ds_get_next_pts(d_video);
 593         double d= (next_pts != MP_NOPTS_VALUE) ? next_pts - d_video->pts : d_video->pts-pts1;
 594         if(d>=0){
 595           if(d>0){
 596             if((int)sh_video->fps==1000)
 597               mp_msg(MSGT_CPLAYER,MSGL_V,"\navg. framerate: %d fps             \n",(int)(1.0f/d));
 598             sh_video->frametime=d; // 1ms
 599             sh_video->fps=1.0f/d;
 600           }
 601           frame_time = d;
 602         } else {
 603           mp_msg(MSGT_CPLAYER,MSGL_WARN,"\nInvalid frame duration value (%5.3f/%5.3f => %5.3f). Defaulting to %5.3f sec.\n",d_video->pts,next_pts,d,frame_time);
 604           // frame_time = 1/25.0;
 605         }
 606       }
 607       break;
 608       case DEMUXER_TYPE_LAVF:
 609       case DEMUXER_TYPE_LAVF_PREFERRED:
 610         if((int)sh_video->fps==1000 || (int)sh_video->fps<=1){
 611           double next_pts = ds_get_next_pts(d_video);
 612           double d= (next_pts != MP_NOPTS_VALUE) ? next_pts - d_video->pts : d_video->pts-pts1;
 613           if(d>=0){
 614             frame_time = d;
 615           }
 616         }
 617       break;
 618       case DEMUXER_TYPE_REAL:
 619         {
 620           double next_pts = ds_get_next_pts(d_video);
 621           double d = (next_pts != MP_NOPTS_VALUE) ? next_pts - d_video->pts : d_video->pts - pts1;
 622
 623           frame_time = (d >= 0 && pts1 > 0) ? d : 0.001;
 624         }
 625       break;
 626     }
 627
 628     if(video_codec == VIDEO_MPEG12){
 629         sh_video->pts+=frame_time;
 630         if(picture_coding_type==1)
 631             d_video->flags |= 1;
 632         if(picture_coding_type<=2 && sh_video->i_pts){
 633             sh_video->pts=sh_video->i_pts;
 634             sh_video->i_pts=pts;
 635         } else {
 636             if(pts){
 637                 if(picture_coding_type<=2) sh_video->i_pts=pts;
 638                 else sh_video->pts=pts;
 639             }
 640         }
 641     } else
 642         sh_video->pts=d_video->pts;
 643
 644     if(frame_time_ptr) *frame_time_ptr=frame_time;
 645     return in_size;
 646 }
 647