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
  33 #include "stream/stream.h"
  34 #include "demuxer.h"
  35 #include "demux_ty_osd.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_tmsg(MSGT_DECVIDEO,MSGL_ERR,"Cannot allocate shared memory.\n");
 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    sh_video->disp_w = picture.display_picture_width;
 172    sh_video->disp_h = picture.display_picture_height;
 173    units[vop_cnt] = picture.timeinc_unit;
 174    vop_cnt++;
 175    //mp_msg(MSGT_DECVIDEO,MSGL_V, "TYPE: %d, unit: %d\n", picture.picture_type, picture.timeinc_unit);
 176    if(!picture.fps) {
 177      int i, mn, md, mx, diff;
 178      if(vop_cnt < 3)
 179           goto mp4_init;
 180
 181      i=0;
 182      mn = mx = units[0];
 183      for(i=0; i<3; i++) {
 184        if(units[i] < mn)
 185          mn = units[i];
 186        if(units[i] > mx)
 187          mx = units[i];
 188      }
 189      md = mn;
 190      for(i=0; i<3; i++) {
 191        if((units[i] > mn) && (units[i] < mx))
 192          md = units[i];
 193      }
 194      mp_msg(MSGT_DECVIDEO,MSGL_V, "MIN: %d, mid: %d, max: %d\n", mn, md, mx);
 195      if(mx - md > md - mn)
 196        diff = md - mn;
 197      else
 198        diff = mx - md;
 199      if(diff > 0){
 200        picture.fps = ((float)picture.timeinc_resolution) / diff;
 201        mp_msg(MSGT_DECVIDEO,MSGL_V, "FPS seems to be: %f, resolution: %d, delta_units: %d\n", picture.fps, picture.timeinc_resolution, diff);
 202      }
 203    }
 204    if(picture.fps) {
 205     sh_video->fps=picture.fps;
 206     sh_video->frametime=1.0/picture.fps;
 207     mp_msg(MSGT_DECVIDEO,MSGL_INFO, "FPS seems to be: %f\n", picture.fps);
 208    }
 209    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 210    sh_video->format=0x10000004;
 211    break;
 212  }
 213  case VIDEO_H264: {
 214    int pos = 0;
 215    videobuf_len=0; videobuf_code_len=0;
 216    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for sequence parameter set... ");
 217    while(1){
 218       int i=sync_video_packet(d_video);
 219       if((i&~0x60) == 0x107 && i != 0x107) break; // found it!
 220       if(!i || !skip_video_packet(d_video)){
 221         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 222         return 0;
 223       }
 224    }
 225    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 226    if(!videobuffer) {
 227      videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE + MP_INPUT_BUFFER_PADDING_SIZE);
 228      if (videobuffer) memset(videobuffer+VIDEOBUFFER_SIZE, 0, MP_INPUT_BUFFER_PADDING_SIZE);
 229      else {
 230        mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"Cannot allocate shared memory.\n");
 231        return 0;
 232      }
 233    }
 234    pos = videobuf_len+4;
 235    if(!read_video_packet(d_video)){
 236      mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Can't read sequence parameter set\n");
 237      return 0;
 238    }
 239    h264_parse_sps(&picture, &(videobuffer[pos]), videobuf_len - pos);
 240    sh_video->disp_w=picture.display_picture_width;
 241    sh_video->disp_h=picture.display_picture_height;
 242    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for picture parameter set... ");
 243    while(1){
 244       int i=sync_video_packet(d_video);
 245       mp_msg(MSGT_DECVIDEO,MSGL_V,"H264: 0x%X\n",i);
 246       if((i&~0x60) == 0x108 && i != 0x108) break; // found it!
 247       if(!i || !read_video_packet(d_video)){
 248         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 249         return 0;
 250       }
 251    }
 252    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\nSearching for Slice... ");
 253    while(1){
 254       int i=sync_video_packet(d_video);
 255       if((i&~0x60) == 0x101 || (i&~0x60) == 0x102 || (i&~0x60) == 0x105) break; // found it!
 256       if(!i || !read_video_packet(d_video)){
 257         mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 258         return 0;
 259       }
 260    }
 261    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 262    sh_video->format=0x10000005;
 263    if(picture.fps) {
 264      sh_video->fps=picture.fps;
 265      sh_video->frametime=1.0/picture.fps;
 266      mp_msg(MSGT_DECVIDEO,MSGL_INFO, "FPS seems to be: %f\n", picture.fps);
 267    }
 268    break;
 269  }
 270  case VIDEO_MPEG12: {
 271    if (d_video->demuxer->file_format == DEMUXER_TYPE_ASF) { // DVR-MS
 272      if(!sh_video->bih) return 0;
 273      sh_video->format=sh_video->bih->biCompression;
 274    }
 275 mpeg_header_parser:
 276    // Find sequence_header first:
 277    videobuf_len=0; videobuf_code_len=0;
 278    telecine=0; telecine_cnt=-2.5;
 279    mp_msg(MSGT_DECVIDEO,MSGL_V,"Searching for sequence header... ");
 280    while(1){
 281       int i=sync_video_packet(d_video);
 282       if(i==0x1B3) break; // found it!
 283       if(!i || !skip_video_packet(d_video)){
 284         if( mp_msg_test(MSGT_DECVIDEO,MSGL_V) )  mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 285         mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"MPEG: FATAL: EOF while searching for sequence header.\n");
 286         return 0;
 287       }
 288    }
 289    mp_msg(MSGT_DECVIDEO,MSGL_V,"OK!\n");
 290    // ========= Read & process sequence header & extension ============
 291    if(!videobuffer) {
 292      videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE + MP_INPUT_BUFFER_PADDING_SIZE);
 293      if (videobuffer) memset(videobuffer+VIDEOBUFFER_SIZE, 0, MP_INPUT_BUFFER_PADDING_SIZE);
 294      else {
 295        mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"Cannot allocate shared memory.\n");
 296        return 0;
 297      }
 298    }
 299
 300    if(!read_video_packet(d_video)){
 301      mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"FATAL: Cannot read sequence header.\n");
 302      return 0;
 303    }
 304    if(mp_header_process_sequence_header (&picture, &videobuffer[4])) {
 305      mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"MPEG: bad sequence header\n");
 306      goto mpeg_header_parser;
 307    }
 308    if(sync_video_packet(d_video)==0x1B5){ // next packet is seq. ext.
 309     int pos=videobuf_len;
 310     if(!read_video_packet(d_video)){
 311       mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"FATAL: Cannot read sequence header extension.\n");
 312       return 0;
 313     }
 314     if(mp_header_process_extension (&picture, &videobuffer[pos+4])) {
 315       mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"MPEG: bad sequence header extension\n");
 316       return 0;
 317     }
 318    }
 319
 320    // display info:
 321    sh_video->format=picture.mpeg1?0x10000001:0x10000002; // mpeg video
 322    sh_video->fps=picture.fps * picture.frame_rate_extension_n / picture.frame_rate_extension_d;
 323    if(!sh_video->fps){
 324      sh_video->frametime=0;
 325    } else {
 326      sh_video->frametime=1.0/sh_video->fps;
 327    }
 328    sh_video->disp_w=picture.display_picture_width;
 329    sh_video->disp_h=picture.display_picture_height;
 330    // bitrate:
 331    if(picture.bitrate!=0x3FFFF) // unspecified/VBR ?
 332        sh_video->i_bps=picture.bitrate * 400 / 8;
 333    // info:
 334    mp_dbg(MSGT_DECVIDEO,MSGL_DBG2,"mpeg bitrate: %d (%X)\n",picture.bitrate,picture.bitrate);
 335    mp_msg(MSGT_DECVIDEO,MSGL_INFO,"VIDEO:  %s  %dx%d  (aspect %d)  %5.3f fps  %5.1f kbps (%4.1f kbyte/s)\n",
 336     picture.mpeg1?"MPEG1":"MPEG2",
 337     sh_video->disp_w,sh_video->disp_h,
 338     picture.aspect_ratio_information,
 339     sh_video->fps,
 340     sh_video->i_bps * 8 / 1000.0,
 341     sh_video->i_bps / 1000.0 );
 342   break;
 343  }
 344  case VIDEO_VC1: {
 345    // Find sequence_header:
 346    videobuf_len=0;
 347    videobuf_code_len=0;
 348    mp_msg(MSGT_DECVIDEO,MSGL_INFO,"Searching for VC1 sequence header... ");
 349    while(1){
 350       int i=sync_video_packet(d_video);
 351       if(i==0x10F) break; // found it!
 352       if(!i || !skip_video_packet(d_video)){
 353         if( mp_msg_test(MSGT_DECVIDEO,MSGL_V) )  mp_msg(MSGT_DECVIDEO,MSGL_V,"NONE :(\n");
 354         mp_msg(MSGT_DECVIDEO,MSGL_ERR, "Couldn't find VC-1 sequence header\n");
 355         return 0;
 356       }
 357    }
 358    mp_msg(MSGT_DECVIDEO,MSGL_INFO,"found\n");
 359    if(!videobuffer) {
 360      videobuffer=(char*)memalign(8,VIDEOBUFFER_SIZE + MP_INPUT_BUFFER_PADDING_SIZE);
 361      if (videobuffer) memset(videobuffer+VIDEOBUFFER_SIZE, 0, MP_INPUT_BUFFER_PADDING_SIZE);
 362      else {
 363        mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"Cannot allocate shared memory.\n");
 364        return 0;
 365      }
 366    }
 367    if(!read_video_packet(d_video)){
 368      mp_msg(MSGT_DECVIDEO,MSGL_ERR, "Couldn't read VC-1 sequence header!\n");
 369      return 0;
 370    }
 371
 372    while(1) {
 373       int i=sync_video_packet(d_video);
 374       if(i==0x10E) break; // found it!
 375       if(!i || !skip_video_packet(d_video)){
 376         mp_msg(MSGT_DECVIDEO,MSGL_V,"Couldn't find VC-1 entry point sync-code:(\n");
 377         return 0;
 378       }
 379    }
 380    if(!read_video_packet(d_video)){
 381       mp_msg(MSGT_DECVIDEO,MSGL_V,"Couldn't read VC-1 entry point sync-code:(\n");
 382       return 0;
 383    }
 384
 385    if(mp_vc1_decode_sequence_header(&picture, &videobuffer[4], videobuf_len-4)) {
 386      sh_video->bih = calloc(1, sizeof(*sh_video->bih) + videobuf_len);
 387      if(sh_video->bih == NULL) {
 388        mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Couldn't alloc %d bytes for VC-1 extradata!\n", sizeof(*sh_video->bih) + videobuf_len);
 389        return 0;
 390      }
 391      sh_video->bih->biSize= sizeof(*sh_video->bih) + videobuf_len;
 392      memcpy(sh_video->bih + 1, videobuffer, videobuf_len);
 393      sh_video->bih->biCompression = sh_video->format;
 394      sh_video->bih->biWidth = sh_video->disp_w = picture.display_picture_width;
 395      sh_video->bih->biHeight = sh_video->disp_h = picture.display_picture_height;
 396      if(picture.fps > 0) {
 397        sh_video->frametime=1.0/picture.fps;
 398        sh_video->fps = picture.fps;
 399      }
 400      mp_msg(MSGT_DECVIDEO,MSGL_INFO,"VIDEO:  VC-1  %dx%d, %5.3f fps, header len: %d\n",
 401        sh_video->disp_w, sh_video->disp_h, sh_video->fps, videobuf_len);
 402    }
 403   break;
 404  }
 405 } // switch(file_format)
 406
 407 return 1;
 408 }
 409
 410 static void process_userdata(unsigned char* buf,int len){
 411     int i;
 412     /* if the user data starts with "CC", assume it is a CC info packet */
 413     if(len>2 && buf[0]=='C' && buf[1]=='C'){
 414 //    mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"video.c: process_userdata() detected Closed Captions!\n");
 415       subcc_process_data(buf+2,len-2);
 416     }
 417     if( len > 2 && buf[ 0 ] == 'T' && buf[ 1 ] == 'Y' )
 418     {
 419        ty_processuserdata( buf + 2, len - 2 );
 420        return;
 421     }
 422     if(verbose<2) return;
 423     fprintf(stderr, "user_data: len=%3d  %02X %02X %02X %02X '",
 424       len, buf[0], buf[1], buf[2], buf[3]);
 425     for(i=0;i<len;i++)
 426 //    if(buf[i]>=32 && buf[i]<127) fputc(buf[i], stderr);
 427       if(buf[i]&0x60) fputc(buf[i]&0x7F, stderr);
 428     fprintf(stderr, "'\n");
 429 }
 430
 431 int video_read_frame(sh_video_t* sh_video,float* frame_time_ptr,unsigned char** start,int force_fps){
 432     demux_stream_t *d_video=sh_video->ds;
 433     demuxer_t *demuxer=d_video->demuxer;
 434     float frame_time=1;
 435     float pts1=d_video->pts;
 436     float pts=0;
 437     float fps;
 438     int picture_coding_type=0;
 439     int in_size=0;
 440     video_codec_t video_codec = find_video_codec(sh_video);
 441
 442     *start=NULL;
 443
 444   if(video_codec == VIDEO_MPEG12){
 445         int in_frame=0;
 446         //float newfps;
 447         //videobuf_len=0;
 448         while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
 449           int i=sync_video_packet(d_video);
 450           //void* buffer=&videobuffer[videobuf_len+4];
 451           int start=videobuf_len+4;
 452           if(in_frame){
 453             if(i<0x101 || i>=0x1B0){  // not slice code -> end of frame
 454               if(!i) return -1; // EOF
 455               break;
 456             }
 457           } else {
 458             if(i==0x100){
 459               pts=d_video->pts;
 460               d_video->pts=0;
 461             }
 462             if(i>=0x101 && i<0x1B0) in_frame=1; // picture startcode
 463             else if(!i) return -1; // EOF
 464           }
 465           if(!read_video_packet(d_video)) return -1; // EOF
 466           // process headers:
 467           switch(i){
 468             case 0x1B3: mp_header_process_sequence_header (&picture, &videobuffer[start]);break;
 469             case 0x1B5: mp_header_process_extension (&picture, &videobuffer[start]);break;
 470             case 0x1B2: process_userdata (&videobuffer[start], videobuf_len-start);break;
 471             case 0x100: picture_coding_type=(videobuffer[start+1] >> 3) & 7;break;
 472           }
 473         }
 474         fps = picture.fps * picture.frame_rate_extension_n / picture.frame_rate_extension_d;
 475
 476         *start=videobuffer; in_size=videobuf_len;
 477
 478     // get mpeg fps:
 479     if(sh_video->fps!=fps) if(!force_fps && !telecine){
 480             mp_msg(MSGT_CPLAYER,MSGL_WARN,"Warning! FPS changed %5.3f -> %5.3f  (%f) [%d]  \n",sh_video->fps,fps,sh_video->fps-fps,picture.frame_rate_code);
 481             sh_video->fps=fps;
 482             sh_video->frametime=1.0/fps;
 483     }
 484
 485     // fix mpeg2 frametime:
 486     frame_time=(picture.display_time)*0.01f;
 487     picture.display_time=100;
 488     videobuf_len=0;
 489
 490     telecine_cnt*=0.9; // drift out error
 491     telecine_cnt+=frame_time-5.0/4.0;
 492     mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"\r telecine = %3.1f  %5.3f     \n",frame_time,telecine_cnt);
 493
 494     if(telecine){
 495         frame_time=1;
 496         if(telecine_cnt<-1.5 || telecine_cnt>1.5){
 497             mp_tmsg(MSGT_DECVIDEO,MSGL_INFO,"\ndemux_mpg: 30000/1001fps NTSC content detected, switching framerate.\n");
 498             telecine=0;
 499         }
 500     } else
 501         if(telecine_cnt>-0.5 && telecine_cnt<0.5 && !force_fps){
 502             sh_video->fps=sh_video->fps*4/5;
 503             sh_video->frametime=sh_video->frametime*5/4;
 504             mp_tmsg(MSGT_DECVIDEO,MSGL_INFO,"\ndemux_mpg: 24000/1001fps progressive NTSC content detected, switching framerate.\n");
 505             telecine=1;
 506         }
 507   } else if(video_codec == VIDEO_MPEG4){
 508         while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
 509           int i=sync_video_packet(d_video);
 510           if(!i) return -1;
 511           if(!read_video_packet(d_video)) return -1; // EOF
 512           if(i==0x1B6) break;
 513         }
 514         *start=videobuffer; in_size=videobuf_len;
 515         videobuf_len=0;
 516   } else if(video_codec == VIDEO_H264){
 517         int in_picture = 0;
 518         while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
 519           int i=sync_video_packet(d_video);
 520           int pos = videobuf_len+4;
 521           if(!i) return -1;
 522           if(!read_video_packet(d_video)) return -1; // EOF
 523           if((i&~0x60) == 0x107 && i != 0x107) {
 524             h264_parse_sps(&picture, &(videobuffer[pos]), videobuf_len - pos);
 525             if(picture.fps > 0) {
 526               sh_video->fps=picture.fps;
 527               sh_video->frametime=1.0/picture.fps;
 528             }
 529             i=sync_video_packet(d_video);
 530             if(!i) return -1;
 531             if(!read_video_packet(d_video)) return -1; // EOF
 532           }
 533
 534           // here starts the access unit end detection code
 535           // see the mail on MPlayer-dev-eng for details:
 536           // Date: Sat, 17 Sep 2005 11:24:06 +0200
 537           // Subject: Re: [MPlayer-dev-eng] [RFC] h264 ES parser problems
 538           // Message-ID: <20050917092406.GA7699@rz.uni-karlsruhe.de>
 539           if((i&~0x60) == 0x101 || (i&~0x60) == 0x102 || (i&~0x60) == 0x105)
 540             // found VCL NAL with slice header i.e. start of current primary coded
 541             // picture, so start scanning for the end now
 542             in_picture = 1;
 543           if (in_picture) {
 544             i = sync_video_packet(d_video) & ~0x60; // code of next packet
 545             if(i == 0x106 || i == 0x109) break; // SEI or access unit delim.
 546             if(i == 0x101 || i == 0x102 || i == 0x105) {
 547               // assuming arbitrary slice ordering is not allowed, the
 548               // first_mb_in_slice (golomb encoded) value should be 0 then
 549               // for the first VCL NAL in a picture
 550               if (demux_peekc(d_video) & 0x80)
 551                 break;
 552             }
 553           }
 554         }
 555         *start=videobuffer; in_size=videobuf_len;
 556         videobuf_len=0;
 557   }  else if(video_codec == VIDEO_VC1) {
 558        while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE) {
 559          int i=sync_video_packet(d_video);
 560          if(!i) return -1;
 561          if(!read_video_packet(d_video)) return -1; // EOF
 562          if(i==0x10D) break;
 563        }
 564        *start=videobuffer;
 565        in_size=videobuf_len;
 566        videobuf_len=0;
 567   } else {
 568       // frame-based file formats: (AVI,ASF,MOV)
 569     in_size=ds_get_packet(d_video,start);
 570     if(in_size<0) return -1; // EOF
 571   }
 572
 573
 574 //------------------------ frame decoded. --------------------
 575
 576     // Increase video timers:
 577     sh_video->num_frames+=frame_time;
 578     ++sh_video->num_frames_decoded;
 579
 580     frame_time*=sh_video->frametime;
 581
 582     // override frame_time for variable/unknown FPS formats:
 583     if(!force_fps) switch(demuxer->file_format){
 584       case DEMUXER_TYPE_GIF:
 585       case DEMUXER_TYPE_MATROSKA:
 586       case DEMUXER_TYPE_MNG:
 587        if(d_video->pts>0 && pts1>0 && d_video->pts>pts1)
 588          frame_time=d_video->pts-pts1;
 589         break;
 590       case DEMUXER_TYPE_TV:
 591       case DEMUXER_TYPE_MOV:
 592       case DEMUXER_TYPE_FILM:
 593       case DEMUXER_TYPE_VIVO:
 594       case DEMUXER_TYPE_OGG:
 595       case DEMUXER_TYPE_ASF: {
 596         double next_pts = ds_get_next_pts(d_video);
 597         double d= (next_pts != MP_NOPTS_VALUE) ? next_pts - d_video->pts : d_video->pts-pts1;
 598         if(d>=0){
 599           if(d>0){
 600             if((int)sh_video->fps==1000)
 601               mp_msg(MSGT_CPLAYER,MSGL_V,"\navg. framerate: %d fps             \n",(int)(1.0f/d));
 602             sh_video->frametime=d; // 1ms
 603             sh_video->fps=1.0f/d;
 604           }
 605           frame_time = d;
 606         } else {
 607           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);
 608           // frame_time = 1/25.0;
 609         }
 610       }
 611       break;
 612       case DEMUXER_TYPE_LAVF:
 613       case DEMUXER_TYPE_LAVF_PREFERRED:
 614         if((int)sh_video->fps==1000 || (int)sh_video->fps<=1){
 615           double next_pts = ds_get_next_pts(d_video);
 616           double d= (next_pts != MP_NOPTS_VALUE) ? next_pts - d_video->pts : d_video->pts-pts1;
 617           if(d>=0){
 618             frame_time = d;
 619           }
 620         }
 621       break;
 622       case DEMUXER_TYPE_REAL:
 623         {
 624           double next_pts = ds_get_next_pts(d_video);
 625           double d = (next_pts != MP_NOPTS_VALUE) ? next_pts - d_video->pts : d_video->pts - pts1;
 626
 627           frame_time = (d >= 0 && pts1 > 0) ? d : 0.001;
 628         }
 629       break;
 630     }
 631
 632     if(video_codec == VIDEO_MPEG12){
 633         sh_video->pts+=frame_time;
 634         if(picture_coding_type==1)
 635             d_video->flags |= 1;
 636         if(picture_coding_type<=2 && sh_video->i_pts){
 637             sh_video->pts=sh_video->i_pts;
 638             sh_video->i_pts=pts;
 639         } else {
 640             if(pts){
 641                 if(picture_coding_type<=2) sh_video->i_pts=pts;
 642                 else sh_video->pts=pts;
 643             }
 644         }
 645     } else
 646         sh_video->pts=d_video->pts;
 647
 648     if(frame_time_ptr) *frame_time_ptr=frame_time;
 649     return in_size;
 650 }