video.c

自己移植的linux下的流媒体播放器原代码,支持mms协议,支持ftp和http协议.

       sh_video->aspect=4.0/3.0;
     break;
     case 3:  // PAL/NTSC Widescreen SVCD/DVD 16:9
     case 6:  // (PAL?)/NTSC Widescreen SVCD 16:9
       sh_video->aspect=16.0/9.0;
     break;
     case 4:  // according to ISO-138182-2 Table 6.3
       sh_video->aspect=2.21;
       break;
     case 9: // Movie Type ??? / 640x480
       sh_video->aspect=0.0;
     break;
     default:
       mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Detected unknown aspect_ratio_information in mpeg sequence header.\n"
               "Please report the aspect value (%i) along with the movie type (VGA,PAL,NTSC,"
               "SECAM) and the movie resolution (720x576,352x240,480x480,...) to the MPlayer"
               " developers, so that we can add support for it!\nAssuming 1:1 aspect for now.\n",
               picture.aspect_ratio_information);
     case 1:  // VGA 1:1 - do not prescale
       sh_video->aspect=0.0;
     break;
   }
   // display info:
   sh_video->format=picture.mpeg1?0x10000001:0x10000002; // mpeg video
   sh_video->fps=picture.fps*0.0001f;
   if(!sh_video->fps){
//     if(!force_fps){
//       fprintf(stderr,"FPS not specified (or invalid) in the header! Use the -fps option!\n");
//       return 0;
//     }
     sh_video->frametime=0;
   } else {
     sh_video->frametime=10000.0f/(float)picture.fps;
   }
   sh_video->disp_w=picture.display_picture_width;
   sh_video->disp_h=picture.display_picture_height;
   // bitrate:
   if(picture.bitrate!=0x3FFFF) // unspecified/VBR ?
       sh_video->i_bps=picture.bitrate * 400 / 8;
   // info:
   mp_dbg(MSGT_DECVIDEO,MSGL_DBG2,"mpeg bitrate: %d (%X)\n",picture.bitrate,picture.bitrate);
   mp_msg(MSGT_DECVIDEO,MSGL_INFO,"VIDEO:  %s  %dx%d  (aspect %d)  %5.3f fps  %5.1f kbps (%4.1f kbyte/s)\n",
    picture.mpeg1?"MPEG1":"MPEG2",
    sh_video->disp_w,sh_video->disp_h,
    picture.aspect_ratio_information,
    sh_video->fps,
    sh_video->i_bps * 8 / 1000.0,
    sh_video->i_bps / 1000.0 );
  break;
 }
} // switch(file_format)

return 1;
}

void ty_processuserdata( unsigned char* buf, int len );

static void process_userdata(unsigned char* buf,int len){
    int i;
    /* if the user data starts with "CC", assume it is a CC info packet */
    if(len>2 && buf[0]=='C' && buf[1]=='C'){
//    	mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"video.c: process_userdata() detected Closed Captions!\n");
	if(subcc_enabled) subcc_process_data(buf+2,len-2);
    }
    if( len > 2 && buf[ 0 ] == 'T' && buf[ 1 ] == 'Y' )
    {
       ty_processuserdata( buf + 2, len - 2 );
       return;
    }
    if(verbose<2) return;
    printf( "user_data: len=%3d  %02X %02X %02X %02X '",
	    len, buf[0], buf[1], buf[2], buf[3]);
    for(i=0;i<len;i++)
//	if(buf[i]>=32 && buf[i]<127) putchar(buf[i]);
	if(buf[i]&0x60) putchar(buf[i]&0x7F);
    printf("'\n");
}

int video_read_frame(sh_video_t* sh_video,float* frame_time_ptr,unsigned char** start,int force_fps){
    demux_stream_t *d_video=sh_video->ds;
    demuxer_t *demuxer=d_video->demuxer;
    float frame_time=1;
    float pts1=d_video->pts;
    float pts=0;
    int picture_coding_type=0;
//    unsigned char* start=NULL;
    int in_size=0;
    
    *start=NULL;

  if(demuxer->file_format==DEMUXER_TYPE_MPEG_ES || 
  	(demuxer->file_format==DEMUXER_TYPE_MPEG_PS && ((! sh_video->format) || (sh_video->format==0x10000001) || (sh_video->format==0x10000002)))
		  || demuxer->file_format==DEMUXER_TYPE_PVA || 
		  ((demuxer->file_format==DEMUXER_TYPE_MPEG_TS) && ((sh_video->format==0x10000001) || (sh_video->format==0x10000002)))
//		  || demuxer->file_format==DEMUXER_TYPE_MPEG_TY
#ifdef STREAMING_LIVE_DOT_COM
    || (demuxer->file_format==DEMUXER_TYPE_RTP && demux_is_mpeg_rtp_stream(demuxer))
#endif
  ){
        int in_frame=0;
        //float newfps;
        //videobuf_len=0;
        while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
          int i=sync_video_packet(d_video);
	  //void* buffer=&videobuffer[videobuf_len+4];
	  int start=videobuf_len+4;
          if(in_frame){
            if(i<0x101 || i>=0x1B0){  // not slice code -> end of frame
#if 0
              // send END OF FRAME code:
              videobuffer[videobuf_len+0]=0;
              videobuffer[videobuf_len+1]=0;
              videobuffer[videobuf_len+2]=1;
              videobuffer[videobuf_len+3]=0xFF;
              videobuf_len+=4;
#endif
              if(!i) return -1; // EOF
              break;
            }
          } else {
	    if(i==0x100){
		pts=d_video->pts;
		d_video->pts=0;
	    }
            //if(i==0x100) in_frame=1; // picture startcode
            if(i>=0x101 && i<0x1B0) in_frame=1; // picture startcode
            else if(!i) return -1; // EOF
          }
	  //if(grab_frames==2 && (i==0x1B3 || i==0x1B8)) grab_frames=1;
          if(!read_video_packet(d_video)) return -1; // EOF
          //printf("read packet 0x%X, len=%d\n",i,videobuf_len);
	  // process headers:
	  switch(i){
	      case 0x1B3: mp_header_process_sequence_header (&picture, &videobuffer[start]);break;
	      case 0x1B5: mp_header_process_extension (&picture, &videobuffer[start]);break;
	      case 0x1B2: process_userdata (&videobuffer[start], videobuf_len-start);break;
	      case 0x100: picture_coding_type=(videobuffer[start+1] >> 3) & 7;break;
	  }
        }
        
        // if(videobuf_len>max_framesize) max_framesize=videobuf_len; // debug
        //printf("--- SEND %d bytes\n",videobuf_len);
//	if(grab_frames==1){
//	      FILE *f=fopen("grab.mpg","ab");
//	      fwrite(videobuffer,videobuf_len-4,1,f);
//	      fclose(f);
//	}

	*start=videobuffer; in_size=videobuf_len;
	//blit_frame=decode_video(video_out,sh_video,videobuffer,videobuf_len,drop_frame);

#if 1
    // get mpeg fps:
    //newfps=frameratecode2framerate[picture->frame_rate_code]*0.0001f;
    if((int)(sh_video->fps*10000+0.5)!=picture.fps) if(!force_fps && !telecine){
            mp_msg(MSGT_CPLAYER,MSGL_WARN,"Warning! FPS changed %5.3f -> %5.3f  (%f) [%d]  \n",sh_video->fps,picture.fps*0.0001,sh_video->fps-picture.fps*0.0001,picture.frame_rate_code);
            sh_video->fps=picture.fps*0.0001;
            sh_video->frametime=10000.0f/(float)picture.fps;
    }
#endif

    // fix mpeg2 frametime:
    frame_time=(picture.display_time)*0.01f;
    picture.display_time=100;
    videobuf_len=0;

    telecine_cnt*=0.9; // drift out error
    telecine_cnt+=frame_time-5.0/4.0;
    mp_msg(MSGT_DECVIDEO,MSGL_DBG2,"\r telecine = %3.1f  %5.3f     \n",frame_time,telecine_cnt);
    
    if(telecine){
	frame_time=1;
	if(telecine_cnt<-1.5 || telecine_cnt>1.5){
	    mp_msg(MSGT_DECVIDEO,MSGL_INFO,MSGTR_LeaveTelecineMode);
	    telecine=0;
	}
    } else
	if(telecine_cnt>-0.5 && telecine_cnt<0.5 && !force_fps){
	    sh_video->fps=sh_video->fps*4/5;
	    sh_video->frametime=sh_video->frametime*5/4;
	    mp_msg(MSGT_DECVIDEO,MSGL_INFO,MSGTR_EnterTelecineMode);
	    telecine=1;
	}

  } else if((demuxer->file_format==DEMUXER_TYPE_MPEG4_ES) || ((demuxer->file_format==DEMUXER_TYPE_MPEG_TS) && (sh_video->format==0x10000004)) ||
            ((demuxer->file_format==DEMUXER_TYPE_MPEG_PS) && (sh_video->format==0x10000004))
  ){
      //
        while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
          int i=sync_video_packet(d_video);
          if(!i) return -1;
          if(!read_video_packet(d_video)) return -1; // EOF
	  if(i==0x1B6) break;
        }
	*start=videobuffer; in_size=videobuf_len;
	videobuf_len=0;

  } else if(demuxer->file_format==DEMUXER_TYPE_H264_ES || ((demuxer->file_format==DEMUXER_TYPE_MPEG_TS) && (sh_video->format==0x10000005)) ||
            ((demuxer->file_format==DEMUXER_TYPE_MPEG_PS) && (sh_video->format==0x10000005))
  ){
      //
        while(videobuf_len<VIDEOBUFFER_SIZE-MAX_VIDEO_PACKET_SIZE){
          int i=sync_video_packet(d_video);
          int pos = videobuf_len+4;
          if(!i) return -1;
          if(!read_video_packet(d_video)) return -1; // EOF
          if((i&~0x60) == 0x107 && i != 0x107) {
            h264_parse_sps(&picture, &(videobuffer[pos]), videobuf_len - pos);
            if(picture.fps > 0) {
              sh_video->fps=picture.fps*0.0001f;
              sh_video->frametime=10000.0f/(float)picture.fps;
            }
            i=sync_video_packet(d_video);
            if(!i) return -1;
            if(!read_video_packet(d_video)) return -1; // EOF
          }
          if((i&~0x60) == 0x101 || (i&~0x60) == 0x102 || (i&~0x60) == 0x105) break;
        }
	*start=videobuffer; in_size=videobuf_len;
	videobuf_len=0;

  } else {
      // frame-based file formats: (AVI,ASF,MOV)
    in_size=ds_get_packet(d_video,start);
    if(in_size<0) return -1; // EOF
//    if(in_size>max_framesize) max_framesize=in_size;
//    blit_frame=decode_video(video_out,sh_video,start,in_size,drop_frame);
  }

//  vdecode_time=video_time_usage-vdecode_time;

//------------------------ frame decoded. --------------------

    // Increase video timers:
    sh_video->num_frames+=frame_time;
    ++sh_video->num_frames_decoded;

    frame_time*=sh_video->frametime;

    // override frame_time for variable/unknown FPS formats:
    if(!force_fps) switch(demuxer->file_format){
      case DEMUXER_TYPE_GIF:
      case DEMUXER_TYPE_REAL:
      case DEMUXER_TYPE_MATROSKA:
	if(d_video->pts>0 && pts1>0 && d_video->pts>pts1)
	  frame_time=d_video->pts-pts1;
        break;
#ifdef USE_TV
      case DEMUXER_TYPE_TV:
#endif
      case DEMUXER_TYPE_MOV:
      case DEMUXER_TYPE_FILM:
      case DEMUXER_TYPE_VIVO:
      case DEMUXER_TYPE_ASF: {
        float next_pts = ds_get_next_pts(d_video);
        float d= next_pts > 0 ? next_pts - d_video->pts : d_video->pts-pts1;
        if(d>=0){
          if(d>0){
            if((int)sh_video->fps==1000)
              mp_msg(MSGT_CPLAYER,MSGL_V,"\navg. framerate: %d fps             \n",(int)(1.0f/d));
	    sh_video->frametime=d; // 1ms
            sh_video->fps=1.0f/d;
	  }
          frame_time = d;
        } else {
          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);
          // frame_time = 1/25.0;
        }
      }
      break;
      case DEMUXER_TYPE_LAVF:
        if((int)sh_video->fps==1000 || (int)sh_video->fps<=1){
          float next_pts = ds_get_next_pts(d_video);
          float d= next_pts > 0 ? next_pts - d_video->pts : d_video->pts-pts1;
          if(d>=0){
            frame_time = d;
          } 
        }
      break;
    }
    
    if(demuxer->file_format==DEMUXER_TYPE_MPEG_PS ||
       ((demuxer->file_format==DEMUXER_TYPE_MPEG_TS) && ((sh_video->format==0x10000001) || (sh_video->format==0x10000002))) ||
       demuxer->file_format==DEMUXER_TYPE_MPEG_ES
//       || demuxer->file_format==DEMUXER_TYPE_MPEG_TY
       ){

//	if(pts>0.0001) printf("\r!!! pts: %5.3f [%d] (%5.3f)   \n",pts,picture_coding_type,i_pts);

	sh_video->pts+=frame_time;
	if(picture_coding_type<=2 && sh_video->i_pts){
//	    printf("XXX predict: %5.3f pts: %5.3f error=%5.5f   \n",i_pts,d_video->pts2,i_pts-d_video->pts2);
	    sh_video->pts=sh_video->i_pts;
	    sh_video->i_pts=pts;
	} else {
	    if(pts){
		if(picture_coding_type<=2) sh_video->i_pts=pts;
		else {
//		    printf("BBB predict: %5.3f pts: %5.3f error=%5.5f   \n",pts,d_video->pts2,pts-d_video->pts2);
		    sh_video->pts=pts;
		}
	    }
	}
//	printf("\rIII pts: %5.3f [%d] (%5.3f)   \n",d_video->pts2,picture_coding_type,i_pts);
    } else
	sh_video->pts=d_video->pts;
    
    if(frame_time_ptr) *frame_time_ptr=frame_time;
    return in_size;

}