Function hb_ps_stream_find_streams

libhb/stream.c:3894–4075

}

static void hb_ps_stream_find_streams(hb_stream_t *stream)
{
    int ii, jj;
    hb_buffer_t *buf  = hb_buffer_init(HB_DVD_READ_BUFFER_SIZE);

    fseeko( stream->file_handle, 0, SEEK_SET );
    // Scan beginning of file, then if no program stream map is found
    // seek to 20% and scan again since there's occasionally no
    // audio at the beginning (particularly for vobs).
    for ( ii = 0; ii < 2; ii++ )
    {
        for ( jj = 0; jj < MAX_PS_PROBE_SIZE; jj += buf->size )
        {
            int stream_type;
            int len;

            hb_pes_info_t pes_info;
            buf->size = 0;
            len = hb_ps_read_packet( stream, buf );
            if ( len == 0 )
            {
                // Must have reached EOF
                break;
            }
            if ( !hb_parse_ps( stream, buf->data, buf->size, &pes_info ) )
            {
                hb_deep_log( 2, "hb_ps_stream_find_streams: Error parsing PS packet");
                continue;
            }
            if ( pes_info.stream_id == 0xba )
            {
                stream->ts_flags |= TS_HAS_PCR;
            }
            else if ( pes_info.stream_id == 0xbc )
            {
                // program stream map
                // Note that if there is a program map, any
                // extrapolation that is made below based on
                // stream id may be overridden by entry in the map.
                if ( decode_ps_map( stream, buf->data, buf->size ) )
                {
                    hb_log("Found program stream map");
                    // Normally, we could quit here since the program
                    // stream map *should* map all streams. But once
                    // again Tivo breaks things by not always creating
                    // complete maps.  So continue processing...
                }
                else
                {
                    hb_error("Error parsing program stream map");
                }
            }
            else if ( ( pes_info.stream_id & 0xe0 ) == 0xc0 )
            {
                // MPeg audio (c0 - df)
                stream_type = 0x04;
                update_ps_streams( stream, pes_info.stream_id,
                                   pes_info.stream_id_ext, stream_type, -1 );