int
aac_reader_c::probe_file(mm_io_c *in,
uint64_t,
int64_t probe_range,
int num_headers) {
return (find_valid_headers(*in, probe_range, num_headers) != -1) ? 1 : 0;
}
void
mp3_reader_c::read_headers() {
try {
int pos = find_valid_headers(*m_in, 2 * 1024 * 1024, 5);
if (0 > pos)
throw mtx::input::header_parsing_x();
m_in->setFilePointer(pos, seek_beginning);
m_in->read(m_chunk->get_buffer(), 4);
decode_mp3_header(m_chunk->get_buffer(), &m_mp3header);
m_in->setFilePointer(pos, seek_beginning);
show_demuxer_info();
if ((0 < pos) && verbose)
mxwarn_fn(m_ti.m_fname, boost::format(Y("Skipping %1% bytes at the beginning (no valid MP3 header found).\n")) % pos);
m_ti.m_id = 0; // ID for this track.
} catch (mtx::mm_io::exception &) {
throw mtx::input::open_x();
}
}
int
aac_reader_c::probe_file(mm_io_c *in,
uint64_t,
int64_t probe_range,
int num_headers,
bool require_zero_offset) {
int offset = find_valid_headers(*in, probe_range, num_headers);
return (require_zero_offset && (0 == offset)) || (!require_zero_offset && (0 <= offset));
}
int
truehd_reader_c::probe_file(mm_io_c *in,
uint64_t /* size */) {
try {
in->setFilePointer(0, seek_beginning);
skip_id3v2_tag(*in);
return find_valid_headers(*in, TRUEHD_READ_SIZE, 2) ? 1 : 0;
} catch (...) {
return 0;
}
}
int
ac3_reader_c::probe_file(mm_io_c *in,
uint64_t,
int64_t probe_size,
int num_headers,
bool require_zero_offset) {
try {
in->setFilePointer(0, seek_beginning);
skip_id3v2_tag(*in);
int offset = find_valid_headers(*in, probe_size, num_headers);
return (require_zero_offset && (0 == offset)) || (!require_zero_offset && (0 <= offset));
} catch (...) {
return 0;
}
}
