bool
wav_ac3wav_demuxer_c::probe(mm_io_cptr &io) {
io->save_pos();
int len = io->read(m_buf[m_cur_buf]->get_buffer(), AC3WAV_BLOCK_SIZE);
io->restore_pos();
if (decode_buffer(len) > 0)
return true;
m_swap_bytes = true;
return decode_buffer(len) > 0;
}
bool
wav_dts_demuxer_c::probe(mm_io_cptr &io) {
io->save_pos();
auto read_buf = memory_c::alloc(DTS_READ_SIZE);
read_buf->set_size(io->read(read_buf->get_buffer(), DTS_READ_SIZE));
io->restore_pos();
if (!m_parser.detect(*read_buf, 5))
return false;
m_codec.set_specialization(m_parser.get_first_header().get_codec_specialization());
return true;
}
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;
}
bool
wav_ac3acm_demuxer_c::probe(mm_io_cptr &io) {
io->save_pos();
int len = io->read(m_buf[m_cur_buf]->get_buffer(), AC3ACM_READ_SIZE);
io->restore_pos();
ac3::parser_c parser;
int pos = parser.find_consecutive_frames(m_buf[m_cur_buf]->get_buffer(), len, 4);
if (-1 == pos) {
m_swap_bytes = true;
decode_buffer(len);
pos = parser.find_consecutive_frames(m_buf[m_cur_buf]->get_buffer(), len, 4);
}
if (-1 == pos)
return false;
return m_ac3header.decode_header(m_buf[m_cur_buf]->get_buffer() + pos, len - pos);
}
