void
dts_reader_c::read_headers() {
try {
if (m_in->read(m_buf[m_cur_buf], READ_SIZE) != READ_SIZE)
throw mtx::input::header_parsing_x();
m_in->setFilePointer(0, seek_beginning);
} catch (...) {
throw mtx::input::open_x();
}
detect_dts(m_buf[m_cur_buf], READ_SIZE, m_dts14_to_16, m_swap_bytes);
mxdebug_if(m_debug, boost::format("DTS: 14->16 %1% swap %2%\n") % m_dts14_to_16 % m_swap_bytes);
decode_buffer(READ_SIZE);
int pos = find_dts_header(reinterpret_cast<const unsigned char *>(m_buf[m_cur_buf]), READ_SIZE, &m_dtsheader);
if (0 > pos)
throw mtx::input::header_parsing_x();
m_ti.m_id = 0; // ID for this track.
show_demuxer_info();
}
int
mpeg_ts_track_c::new_stream_a_dts() {
add_pes_payload_to_probe_data();
if (-1 == find_dts_header(m_probe_data->get_buffer(), m_probe_data->get_size(), &a_dts_header))
return FILE_STATUS_MOREDATA;
m_apply_dts_timecode_fix = true;
return 0;
}
generic_packetizer_c *
avi_reader_c::create_dts_packetizer(int aid) {
try {
AVI_set_audio_track(m_avi, aid);
long audio_position = AVI_get_audio_position_index(m_avi);
unsigned int num_read = 0;
int dts_position = -1;
byte_buffer_c buffer;
dts_header_t dtsheader;
while ((-1 == dts_position) && (10 > num_read)) {
int chunk_size = AVI_read_audio_chunk(m_avi, nullptr);
if (0 < chunk_size) {
memory_cptr chunk = memory_c::alloc(chunk_size);
AVI_read_audio_chunk(m_avi, reinterpret_cast<char *>(chunk->get_buffer()));
buffer.add(chunk);
dts_position = find_dts_header(buffer.get_buffer(), buffer.get_size(), &dtsheader);
} else {
dts_position = find_dts_header(buffer.get_buffer(), buffer.get_size(), &dtsheader, true);
break;
}
}
if (-1 == dts_position)
throw false;
AVI_set_audio_position_index(m_avi, audio_position);
return new dts_packetizer_c(this, m_ti, dtsheader);
} catch (...) {
mxerror_tid(m_ti.m_fname, aid + 1, Y("Could not find valid DTS headers in this track's first frames.\n"));
return nullptr;
}
}
bool
wav_dts_demuxer_c::probe(mm_io_cptr &io) {
io->save_pos();
int len = io->read(m_buf[m_cur_buf]->get_buffer(), DTS_READ_SIZE);
io->restore_pos();
if (detect_dts(m_buf[m_cur_buf]->get_buffer(), len, m_pack_14_16, m_swap_bytes)) {
len = decode_buffer(len);
int pos = find_consecutive_dts_headers(m_buf[m_cur_buf]->get_buffer(), len, 5);
if (0 <= pos) {
if (0 > find_dts_header(m_buf[m_cur_buf]->get_buffer() + pos, len - pos, &m_dtsheader))
return false;
mxverb(3, boost::format("DTSinWAV: 14->16 %1% swap %2%\n") % m_pack_14_16 % m_swap_bytes);
return true;
}
}
return false;
}
