demux_real_new.c

来自「君正早期ucos系统(只有早期的才不没有打包成库),MPLAYER,文件系统,图」· C语言 代码 · 共 1,849 行 · 第 1/5 页

			stream_skip(demuxer->stream, 4);  // "genr"
			stream_read(demuxer->stream, buf, 4); // fourcc
			buf[4] = 0;
		    }
		    else
		    {		
			/* Desc #1 */
			skip_str(1, demuxer);
			/* Desc #2 */
			get_str(1, demuxer, buf, sizeof(buf));
		    }
                   }

		    /* Emulate WAVEFORMATEX struct: */
		    sh->wf = malloc(sizeof(WAVEFORMATEX));
		    memset(sh->wf, 0, sizeof(WAVEFORMATEX));
		    sh->wf->nChannels = sh->channels;
		    sh->wf->wBitsPerSample = sh->samplesize*8;
		    sh->wf->nSamplesPerSec = sh->samplerate;
		    sh->wf->nAvgBytesPerSec = bitrate/8;
		    sh->wf->nBlockAlign = frame_size;
		    sh->wf->cbSize = 0;
		    sh->format = MKTAG(buf[0], buf[1], buf[2], buf[3]);

		    switch (sh->format)
		    {
			case MKTAG('d', 'n', 'e', 't'):
			    mp_msg(MSGT_DEMUX,MSGL_V,"Audio: DNET -> AC3\n");
//			    sh->format = 0x2000;
			    break;
			case MKTAG('1', '4', '_', '4'):
                sh->wf->nBlockAlign = 0x14;
                            break;

			case MKTAG('2', '8', '_', '8'):
			    sh->wf->nBlockAlign = coded_frame_size;
			    priv->sub_packet_size[stream_id] = sub_packet_size;
			    priv->sub_packet_h[stream_id] = sub_packet_h;
			    priv->coded_framesize[stream_id] = coded_frame_size;
			    priv->audiopk_size[stream_id] = frame_size;
			    break;

			case MKTAG('s', 'i', 'p', 'r'):
			case MKTAG('a', 't', 'r', 'c'):
			case MKTAG('c', 'o', 'o', 'k'):
			    // realaudio codec plugins - common:
			    stream_skip(demuxer->stream,3);  // Skip 3 unknown bytes 
			    if (version==5)
			      stream_skip(demuxer->stream,1);  // Skip 1 additional unknown byte 
			    codecdata_length=stream_read_dword(demuxer->stream);
			    // Check extradata len, we can't store bigger values in cbSize anyway
			    if ((unsigned)codecdata_length > 0xffff) {
			        mp_msg(MSGT_DEMUX,MSGL_ERR,"Extradata too big (%d)\n", codecdata_length);
				goto skip_this_chunk;
			    }
			    sh->wf->cbSize = codecdata_length;
			    sh->wf = realloc(sh->wf, sizeof(WAVEFORMATEX)+sh->wf->cbSize);
			    stream_read(demuxer->stream, ((char*)(sh->wf+1)), codecdata_length); // extras
                if ((sh->format == MKTAG('a', 't', 'r', 'c')) ||
                    (sh->format == MKTAG('c', 'o', 'o', 'k')))
    			    sh->wf->nBlockAlign = sub_packet_size;
    			else
    			    sh->wf->nBlockAlign = coded_frame_size;

			    priv->sub_packet_size[stream_id] = sub_packet_size;
			    priv->sub_packet_h[stream_id] = sub_packet_h;
			    priv->coded_framesize[stream_id] = coded_frame_size;
			    priv->audiopk_size[stream_id] = frame_size;
			    break;

			case MKTAG('r', 'a', 'a', 'c'):
			case MKTAG('r', 'a', 'c', 'p'):
			    /* This is just AAC. The two or five bytes of */
			    /* config data needed for libfaad are stored */
			    /* after the audio headers. */
			    stream_skip(demuxer->stream,3);  // Skip 3 unknown bytes 
			    if (version==5)
				stream_skip(demuxer->stream,1);  // Skip 1 additional unknown byte 
			    codecdata_length=stream_read_dword(demuxer->stream);
			    if (codecdata_length>=1) {
				sh->codecdata_len = codecdata_length - 1;
				sh->codecdata = calloc(sh->codecdata_len, 1);
				stream_skip(demuxer->stream, 1);
				stream_read(demuxer->stream, sh->codecdata, sh->codecdata_len);
			    }
			    sh->format = mmioFOURCC('M', 'P', '4', 'A');
			    break;
			default:
			    mp_msg(MSGT_DEMUX,MSGL_V,"Audio: Unknown (%s)\n", buf);
		    }

		    sh->wf->wFormatTag = sh->format;
		    
		    mp_msg(MSGT_DEMUX,MSGL_V,"audio fourcc: %.4s (%x)\n", (char *)&sh->format, sh->format);
		    if ( mp_msg_test(MSGT_DEMUX,MSGL_V) )
		    print_wave_header(sh->wf, MSGL_V);

		    /* Select audio stream with highest bitrate if multirate file*/
		    if (priv->is_multirate && ((demuxer->audio->id == -1) ||
		                               ((demuxer->audio->id >= 0) && priv->a_bitrate && (bitrate > priv->a_bitrate)))) {
			    demuxer->audio->id = stream_id;
			    priv->a_bitrate = bitrate;
			    mp_msg(MSGT_DEMUX,MSGL_DBG2,"Multirate autoselected audio id %d with bitrate %d\n", stream_id, bitrate);
		    }

		    if(demuxer->audio->id==stream_id){
			sh->ds=demuxer->audio;
			demuxer->audio->sh=sh;
        	priv->audio_buf = calloc(priv->sub_packet_h[demuxer->audio->id], priv->audiopk_size[demuxer->audio->id]);
        	priv->audio_timestamp = calloc(priv->sub_packet_h[demuxer->audio->id], sizeof(double));
		    }
		    
		    ++a_streams;

#ifdef stream_skip
#undef stream_skip
#endif
		}
	  } else if (strstr(mimet,"X-MP3-draft-00")) {
		    sh_audio_t *sh = new_sh_audio(demuxer, stream_id);

		    /* Emulate WAVEFORMATEX struct: */
		    sh->wf = malloc(sizeof(WAVEFORMATEX));
		    memset(sh->wf, 0, sizeof(WAVEFORMATEX));
		    sh->wf->nChannels = 0;//sh->channels;
		    sh->wf->wBitsPerSample = 16;
		    sh->wf->nSamplesPerSec = 0;//sh->samplerate;
		    sh->wf->nAvgBytesPerSec = 0;//bitrate;
		    sh->wf->nBlockAlign = 0;//frame_size;
		    sh->wf->cbSize = 0;
		    sh->wf->wFormatTag = sh->format = mmioFOURCC('a','d','u',0x55);
		    
		    if(demuxer->audio->id==stream_id){
			    sh->ds=demuxer->audio;
			    demuxer->audio->sh=sh;
		    }
		    
		    ++a_streams;
	  } else if (strstr(mimet,"x-ralf-mpeg4")) {
		 mp_msg(MSGT_DEMUX,MSGL_ERR,"Real lossless audio not supported yet\n");
	  } else {
		 mp_msg(MSGT_DEMUX,MSGL_V,"Unknown audio stream format\n");
		}
	} else if (!strncmp(mimet,"video/",6)) {
	  if (strstr(mimet,"x-pn-realvideo") || strstr(mimet,"x-pn-multirate-realvideo")) {
		stream_skip(demuxer->stream, 4);  // VIDO length, same as codec_data_size
		tmp = stream_read_dword(demuxer->stream);
		if(tmp != MKTAG('O', 'D', 'I', 'V'))
		{
		    mp_msg(MSGT_DEMUX,MSGL_V,"Video: can't find VIDO in codec data\n");
		} else {
		    /* video header */
		    sh_video_t *sh = new_sh_video(demuxer, stream_id);

		    sh->format = stream_read_dword_le(demuxer->stream); /* fourcc */
		    mp_msg(MSGT_DEMUX,MSGL_V,"video fourcc: %.4s (%x)\n", (char *)&sh->format, sh->format);

		    /* emulate BITMAPINFOHEADER */
		    sh->bih = malloc(sizeof(BITMAPINFOHEADER)+16);
		    memset(sh->bih, 0, sizeof(BITMAPINFOHEADER)+16);
	    	    sh->bih->biSize = 48;
		    sh->disp_w = sh->bih->biWidth = stream_read_word(demuxer->stream);
		    sh->disp_h = sh->bih->biHeight = stream_read_word(demuxer->stream);
		    sh->bih->biPlanes = 1;
		    sh->bih->biBitCount = 24;
		    sh->bih->biCompression = sh->format;
		    sh->bih->biSizeImage= sh->bih->biWidth*sh->bih->biHeight*3;

		    sh->fps = (float) stream_read_word(demuxer->stream);
		    if (sh->fps<=0) sh->fps=24; // we probably won't even care about fps
		    sh->frametime = 1.0f/sh->fps;
		    
#if 1
		    stream_skip(demuxer->stream, 4);
#else
		    mp_msg(MSGT_DEMUX, MSGL_V,"unknown1: 0x%X  \n",stream_read_dword(demuxer->stream));
		    mp_msg(MSGT_DEMUX, MSGL_V,"unknown2: 0x%X  \n",stream_read_word(demuxer->stream));
		    mp_msg(MSGT_DEMUX, MSGL_V,"unknown3: 0x%X  \n",stream_read_word(demuxer->stream));
#endif
//		    if(sh->format==0x30335652 || sh->format==0x30325652 )
		    if(1)
		    {
			int tmp=stream_read_word(demuxer->stream);
			if(tmp>0){
			    sh->fps=tmp; sh->frametime = 1.0f/sh->fps;
			}
		    } else {
	    		int fps=stream_read_word(demuxer->stream);
			mp_msg(MSGT_DEMUX, MSGL_WARN,"realvid: ignoring FPS = %d\n",fps);
		    }
		    stream_skip(demuxer->stream, 2);
		    
		    // read codec sub-format (to make difference between low and high rate codec)
		    ((unsigned int*)(sh->bih+1))[0]=stream_read_dword(demuxer->stream);

		    /* h263 hack */
		    tmp = stream_read_dword(demuxer->stream);
		    ((unsigned int*)(sh->bih+1))[1]=tmp;
		    mp_msg(MSGT_DEMUX,MSGL_V,"H.263 ID: %x\n", tmp);
		    switch (tmp)
		    {
			case 0x10000000:
			    /* sub id: 0 */
			    /* codec id: rv10 */
			    break;
			case 0x10003000:
			case 0x10003001:
			    /* sub id: 3 */
			    /* codec id: rv10 */
			    sh->bih->biCompression = sh->format = mmioFOURCC('R', 'V', '1', '3');
			    break;
			case 0x20001000:
			case 0x20100001:
			case 0x20200002:
			    /* codec id: rv20 */
			    break;
			case 0x30202002:
			    /* codec id: rv30 */
			    break;
			case 0x40000000:
			    /* codec id: rv40 */
			    break;
			default:
			    /* codec id: none */
			    mp_msg(MSGT_DEMUX,MSGL_V,"unknown id: %x\n", tmp);
		    }

		    if((sh->format<=0x30335652) && (tmp>=0x20200002)){
			    // read data for the cmsg24[] (see vd_realvid.c)
			    unsigned int cnt = codec_data_size - (stream_tell(demuxer->stream) - codec_pos);
			    if (cnt < 2) {
			        mp_msg(MSGT_DEMUX, MSGL_ERR,"realvid: cmsg24 data too short (size %u)\n", cnt);
			    } else  {
			        int ii;
			        if (cnt > 8) {
			            mp_msg(MSGT_DEMUX, MSGL_WARN,"realvid: cmsg24 data too big, please report (size %u)\n", cnt);
			            cnt = 8;
			        }
			        for (ii = 0; ii < cnt; ii++)
			            ((unsigned char*)(sh->bih+1))[8+ii]=(unsigned short)stream_read_char(demuxer->stream);
			        sh->bih->biSize += cnt;
			    }
		    } 
		    
		    /* Select video stream with highest bitrate if multirate file*/
		    if (priv->is_multirate && ((demuxer->video->id == -1) ||
		                               ((demuxer->video->id >= 0) && priv->v_bitrate && (bitrate > priv->v_bitrate)))) {
			    demuxer->video->id = stream_id;
			    priv->v_bitrate = bitrate;
			    mp_msg(MSGT_DEMUX,MSGL_DBG2,"Multirate autoselected video id %d with bitrate %d\n", stream_id, bitrate);
		    }

		    if(demuxer->video->id==stream_id){
			sh->ds=demuxer->video;
			demuxer->video->sh=sh;
		    }
		    
		    ++v_streams;

		}
	  } else {
		 mp_msg(MSGT_DEMUX,MSGL_V,"Unknown video stream format\n");
	  }
	} else if (strstr(mimet,"logical-")) {
		 if (strstr(mimet,"fileinfo")) {
		     mp_msg(MSGT_DEMUX,MSGL_V,"Got a logical-fileinfo chunk\n");
		 } else if (strstr(mimet,"-audio") || strstr(mimet,"-video")) {
		    int i, stream_cnt;
		    int stream_list[MAX_STREAMS];
		    
		    priv->is_multirate = 1;
		    stream_skip(demuxer->stream, 4); // Length of codec data (repeated)
		    stream_cnt = stream_read_dword(demuxer->stream); // Get number of audio or video streams
		    if ((unsigned)stream_cnt >= MAX_STREAMS) {
		        mp_msg(MSGT_DEMUX,MSGL_ERR,"Too many streams in %s. Big troubles ahead.\n", mimet);
		        goto skip_this_chunk;
		    }
		    for (i = 0; i < stream_cnt; i++)
		        stream_list[i] = stream_read_word(demuxer->stream);
		    for (i = 0; i < stream_cnt; i++)
		        if ((unsigned)stream_list[i] >= MAX_STREAMS) {
		            mp_msg(MSGT_DEMUX,MSGL_ERR,"Stream id out of range: %d. Ignored.\n", stream_list[i]);
		            stream_skip(demuxer->stream, 4); // Skip DATA offset for broken stream
		        } else {
		            priv->str_data_offset[stream_list[i]] = stream_read_dword(demuxer->stream);
		            mp_msg(MSGT_DEMUX,MSGL_V,"Stream %d with DATA offset 0x%08x\n", stream_list[i], priv->str_data_offset[stream_list[i]]);
		        }
		    // Skip the rest of this chunk
		 } else 
		     mp_msg(MSGT_DEMUX,MSGL_V,"Unknown logical stream\n");
		}
		else {
		    mp_msg(MSGT_DEMUX, MSGL_ERR, "Not audio/video stream or unsupported!\n");
		}
//		break;
//	    default:
skip_this_chunk:
		/* skip codec info */
		tmp = stream_tell(demuxer->stream) - codec_pos;
		mp_msg(MSGT_DEMUX,MSGL_V,"### skipping %d bytes of codec info\n", codec_data_size - tmp);
#if 0
		{ int i;
		  for(i=0;i<codec_data_size - tmp;i++)
		      mp_msg(MSGT_DEMUX, MSGL_V," %02X",stream_read_char(demuxer->stream));
		  mp_msg(MSGT_DEMUX, MSGL_V,"\n");
		}
#else
		stream_skip(demuxer->stream, codec_data_size - tmp);
#endif
		if (mimet)
		    free (mimet);
		break;
//	    }
	    }
	    case MKTAG('D', 'A', 'T', 'A'):
		goto header_end;
	    case MKTAG('I', 'N', 'D', 'X'):
	    default:
		mp_msg(MSGT_DEMUX,MSGL_V,"Unknown chunk: %x\n", chunk_id);
		stream_skip(demuxer->stream, chunk_size - 10);
		break;
	}
    }

header_end:
    if(priv->is_multirate) {
        mp_msg(MSGT_DEMUX,MSGL_V,"Selected video id %d audio id %d\n", demuxer->video->id, demuxer->audio->id);
        /* Perform some sanity checks to avoid checking streams id all over the code*/
        if (demuxer->audio->id >= MAX_STREAMS) {
            mp_msg(MSGT_DEMUX,MSGL_ERR,"Invalid audio stream %d. No sound will be played.\n", demuxer->audio->id);
            demuxer->audio->id = -2;
        } else if ((demuxer->audio->id >= 0) && (priv->str_data_offset[demuxer->audio->id] == 0)) {
            mp_msg(MSGT_DEMUX,MSGL_ERR,"Audio stream %d not found. No sound will be played.\n", demuxer->audio->id);
            demuxer->audio->id = -2;
        }
        if (demuxer->video->id >= MAX_STREAMS) {
            mp_msg(MSGT_DEMUX,MSGL_ERR,"Invalid video stream %d. No video will be played.\n", demuxer->video->id);
            demuxer->video->id = -2;
        } else if ((demuxer->video->id >= 0) && (priv->str_data_offset[demuxer->video->id] == 0)) {
            mp_msg(MSGT_DEMUX,MSGL_ERR,"Video stream %d not found. No video will be played.\n", demuxer->video->id);
            demuxer->video->id = -2;
        }
    }

    if(priv->is_multirate && ((demuxer->video->id >= 0) || (demuxer->audio->id  >=0))) {
        /* If audio or video only, seek to right place and behave like standard file */
        if (demuxer->video->id < 0) {
            // Stream is audio only, or -novideo
            stream_seek(demuxer->stream, priv->data_chunk_offset = priv->str_data_offset[demuxer->audio->id]+10);
            priv->is_multirate = 0;
        }
        if (demuxer->audio->id < 0) {
            // Stream is video only, or -nosound
            stream_seek(demuxer->stream, priv->data_chunk_offset = priv->str_data_offset[demuxer->video->id]+10);
            priv->is_multirate = 0;
        }
    }

  if(!priv->is_multirate) {
//    printf("i=%d num_of_headers=%d   \n",i,num_of_headers);
    priv->num_of_packets = stream_read_dword(demuxer->stream);
    stream_skip(demuxer->stream, 4); /* next data header */

    mp_msg(MSGT_DEMUX,MSGL_V,"Packets in file: %d\n", priv->num_of_packets);

    if (priv->num_of_packets == 0)
	priv->num_of_packets = -10;
  } else {