/* Create a title and get PID's by scanning first few bytes. */
int mpeg3_create_title(mpeg3_demuxer_t *demuxer,
FILE *toc)
{
int result = 0, done = 0, counter_start, counter;
mpeg3_t *file = demuxer->file;
int64_t next_byte, prev_byte;
double next_time, prev_time, absolute_time;
long i;
mpeg3_title_t *title;
u_int32_t test_header = 0;
demuxer->error_flag = 0;
demuxer->read_all = 1;
/* Create a single title */
if(!demuxer->total_titles)
{
demuxer->titles[0] = mpeg3_new_title(file, file->fs->path);
demuxer->total_titles = 1;
mpeg3demux_open_title(demuxer, 0);
}
title = demuxer->titles[0];
title->total_bytes = mpeg3io_total_bytes(title->fs);
title->start_byte = 0;
title->end_byte = title->total_bytes;
// Create default cell
mpeg3_new_cell(title,
0,
title->end_byte,
0,
title->end_byte,
0);
/* Get PID's and tracks */
if(file->is_transport_stream || file->is_program_stream)
{
mpeg3io_seek(title->fs, 0);
while(!done && !result && !mpeg3io_eof(title->fs))
{
next_byte = mpeg3io_tell(title->fs);
result = mpeg3_read_next_packet(demuxer);
/* Just get the first bytes if not building a toc to get the stream ID's. */
if(next_byte > 0x1000000 && !toc) done = 1;
}
}
mpeg3io_seek(title->fs, 0);
demuxer->read_all = 0;
return 0;
}
int mpeg3_read_toc(mpeg3_t *file)
{
char string[MPEG3_STRLEN];
int version;
/* Test version number */
mpeg3io_seek(file->fs, 0);
fscanf(file->fs->fd, "%s %d", string, &version);
if(version != TOCVERSION && version != TOCVIDEO) return 1;
switch(version)
{
case TOCVIDEO:
file->is_video_stream = 1;
break;
}
/* Read titles */
read_titles(file->demuxer, version);
return 0;
}
/* If toc is 0 just read the first and last timecode. */
int mpeg3demux_create_title(mpeg3_demuxer_t *demuxer,
int timecode_search,
FILE *toc)
{
int result = 0, done = 0, counter_start, counter;
mpeg3_t *file = demuxer->file;
long next_byte, prev_byte;
double next_time, prev_time, absolute_time;
long i;
mpeg3_title_t *title;
u_int32_t test_header = 0;
mpeg3demux_timecode_t *timecode = 0;
demuxer->error_flag = 0;
demuxer->read_all = 1;
/* Create a single title */
if(!demuxer->total_titles)
{
demuxer->titles[0] = mpeg3_new_title(file, file->fs->path);
demuxer->total_titles = 1;
mpeg3demux_open_title(demuxer, 0);
}
title = demuxer->titles[0];
title->total_bytes = mpeg3io_total_bytes(title->fs);
/* Get the packet size from the file */
if(file->is_program_stream)
{
mpeg3io_seek(title->fs, 4);
for(i = 0; i < MPEG3_MAX_PACKSIZE &&
test_header != MPEG3_PACK_START_CODE; i++)
{
test_header <<= 8;
test_header |= mpeg3io_read_char(title->fs);
}
if(i < MPEG3_MAX_PACKSIZE) demuxer->packet_size = i;
if(i < MPEG3_DVD_PACKET_SIZE) demuxer->packet_size = 4096;
mpeg3io_seek(title->fs, 0);
}
else
demuxer->packet_size = file->packet_size;
/* Get timecodes for the title */
if(file->is_transport_stream || file->is_program_stream)
{
mpeg3io_seek(title->fs, 0);
while(!done && !result && !mpeg3io_eof(title->fs))
{
next_byte = mpeg3io_tell(title->fs);
result = mpeg3_read_next_packet(demuxer);
if(!result)
{
next_time = demuxer->time;
//printf("%f %f\n", next_time, prev_time);
if(next_time < prev_time ||
next_time - prev_time > MPEG3_CONTIGUOUS_THRESHOLD ||
!title->timecode_table_size)
{
/* Discontinuous */
timecode = mpeg3_append_timecode(demuxer,
title,
prev_byte,
prev_time,
next_byte,
next_time,
0,
0);
/*
* printf("timecode: %ld %ld %f %f\n",
* timecode->start_byte,
* timecode->end_byte,
* timecode->start_time,
* timecode->end_time);
*/
counter_start = next_time;
}
prev_time = next_time;
prev_byte = next_byte;
counter = next_time;
}
/* Just get the first bytes if not building a toc to get the stream ID's. */
if(next_byte > 0x100000 &&
(!timecode_search || !toc)) done = 1;
}
/* Get the last timecode */
if(!toc || !timecode_search)
{
demuxer->read_all = 0;
result = mpeg3io_seek(title->fs, title->total_bytes);
if(!result) result = mpeg3_read_prev_packet(demuxer);
}
if(title->timecode_table && timecode)
{
timecode->end_byte = title->total_bytes;
// timecode->end_byte = mpeg3io_tell(title->fs)/* + demuxer->packet_size */;
timecode->end_time = demuxer->time;
timecode->absolute_end_time = timecode->end_time - timecode->start_time;
}
}
mpeg3io_seek(title->fs, 0);
demuxer->read_all = 0;
return 0;
}