int
wav_ac3wav_demuxer_c::decode_buffer(int len) {
if (len < 8)
return -1;
if (m_swap_bytes) {
memcpy( m_buf[m_cur_buf ^ 1]->get_buffer(), m_buf[m_cur_buf]->get_buffer(), 8);
swab((char *)m_buf[m_cur_buf]->get_buffer() + 8, (char *)m_buf[m_cur_buf ^ 1]->get_buffer() + 8, len - 8);
m_cur_buf ^= 1;
}
unsigned char *base = m_buf[m_cur_buf]->get_buffer();
if ((get_uint16_le(&base[0]) != AC3WAV_SYNC_WORD1) || (get_uint16_le(&base[2]) != AC3WAV_SYNC_WORD2) || (0x01 != base[4]))
return -1;
int payload_len = get_uint16_le(&base[6]) / 8;
if ((payload_len + 8) > len)
return -1;
if (!m_ac3header.decode_header(&base[8], payload_len))
return -1;
return payload_len;
}
void
wav_reader_c::dump_headers() {
mxinfo(boost::format("File '%1%' wave_header dump\n"
" riff:\n"
" id: %2%%3%%4%%5%\n"
" len: %6%\n"
" wave_id: %7%%8%%9%%10%\n"
" common:\n"
" wFormatTag: %|11$04x|\n"
" wChannels: %12%\n"
" dwSamplesPerSec: %13%\n"
" dwAvgBytesPerSec: %14%\n"
" wBlockAlign: %15%\n"
" wBitsPerSample: %16%\n"
" actual format_tag: %17%\n")
% m_ti.m_fname
% char(m_wheader.riff.id[0]) % char(m_wheader.riff.id[1]) % char(m_wheader.riff.id[2]) % char(m_wheader.riff.id[3])
% get_uint32_le(&m_wheader.riff.len)
% char(m_wheader.riff.wave_id[0]) % char(m_wheader.riff.wave_id[1]) % char(m_wheader.riff.wave_id[2]) % char(m_wheader.riff.wave_id[3])
% get_uint16_le(&m_wheader.common.wFormatTag)
% get_uint16_le(&m_wheader.common.wChannels)
% get_uint32_le(&m_wheader.common.dwSamplesPerSec)
% get_uint32_le(&m_wheader.common.dwAvgBytesPerSec)
% get_uint16_le(&m_wheader.common.wBlockAlign)
% get_uint16_le(&m_wheader.common.wBitsPerSample)
% m_format_tag);
}
void
tta_reader_c::create_packetizer(int64_t) {
if (!demuxing_requested('a', 0) || (NPTZR() != 0))
return;
add_packetizer(new tta_packetizer_c(this, m_ti, get_uint16_le(&header.channels), get_uint16_le(&header.bits_per_sample), get_uint32_le(&header.sample_rate)));
show_packetizer_info(0, PTZR0);
}
wav_pcm_demuxer_c::wav_pcm_demuxer_c(wav_reader_c *reader,
wave_header *wheader,
bool _float):
wav_demuxer_c(reader, wheader),
m_bps(0),
ieee_float(_float) {
m_bps = get_uint16_le(&m_wheader->common.wChannels) * get_uint16_le(&m_wheader->common.wBitsPerSample) * get_uint32_le(&m_wheader->common.dwSamplesPerSec) / 8;
m_buffer = memory_c::alloc(m_bps);
}
generic_packetizer_c *
wav_pcm_demuxer_c::create_packetizer() {
m_ptzr = new pcm_packetizer_c(m_reader, m_ti,
get_uint32_le(&m_wheader->common.dwSamplesPerSec),
get_uint16_le(&m_wheader->common.wChannels),
get_uint16_le(&m_wheader->common.wBitsPerSample),
ieee_float ? pcm_packetizer_c::ieee_float : pcm_packetizer_c::little_endian_integer);
show_packetizer_info(0, m_ptzr);
return m_ptzr;
}
void
wav_reader_c::parse_file() {
int chunk_idx;
if (m_in->read(&m_wheader.riff, sizeof(m_wheader.riff)) != sizeof(m_wheader.riff))
throw mtx::input::header_parsing_x();
scan_chunks();
if ((chunk_idx = find_chunk("fmt ")) == -1)
throw mtx::input::header_parsing_x();
m_in->setFilePointer(m_chunks[chunk_idx].pos, seek_beginning);
try {
if (m_in->read(&m_wheader.format, sizeof(m_wheader.format)) != sizeof(m_wheader.format))
throw false;
if (static_cast<uint64_t>(m_chunks[chunk_idx].len) >= sizeof(alWAVEFORMATEXTENSIBLE)) {
alWAVEFORMATEXTENSIBLE format;
if (m_in->read(&format, sizeof(format)) != sizeof(format))
throw false;
memcpy(&m_wheader.common, &format, sizeof(m_wheader.common));
m_format_tag = get_uint16_le(&m_wheader.common.wFormatTag);
if (0xfffe == m_format_tag)
m_format_tag = get_uint32_le(&format.extension.guid.data1);
} else if (m_in->read(&m_wheader.common, sizeof(m_wheader.common)) != sizeof(m_wheader.common))
throw false;
else
m_format_tag = get_uint16_le(&m_wheader.common.wFormatTag);
} catch (...) {
throw mtx::input::header_parsing_x();
}
if ((m_cur_data_chunk_idx = find_chunk("data", 0, false)) == -1)
throw mtx::input::header_parsing_x();
if (debugging_c::requested("wav_reader|wav_reader_headers"))
dump_headers();
m_in->setFilePointer(m_chunks[m_cur_data_chunk_idx].pos + sizeof(struct chunk_struct), seek_beginning);
m_remaining_bytes_in_current_data_chunk = m_chunks[m_cur_data_chunk_idx].len;
}
void
avi_reader_c::identify_audio() {
int i;
for (i = 0; i < AVI_audio_tracks(m_avi); i++) {
AVI_set_audio_track(m_avi, i);
unsigned int audio_format = AVI_audio_format(m_avi);
alWAVEFORMATEX *wfe = m_avi->wave_format_ex[i];
if ((0xfffe == audio_format) && (get_uint16_le(&wfe->cb_size) >= (sizeof(alWAVEFORMATEXTENSION)))) {
alWAVEFORMATEXTENSIBLE *ext = reinterpret_cast<alWAVEFORMATEXTENSIBLE *>(wfe);
audio_format = get_uint32_le(&ext->extension.guid.data1);
}
std::string type
= (0x0001 == audio_format) || (0x0003 == audio_format) ? "PCM"
: (0x0050 == audio_format) ? "MP2"
: (0x0055 == audio_format) ? "MP3"
: (0x2000 == audio_format) ? "AC3"
: (0x2001 == audio_format) ? "DTS"
: (0x0050 == audio_format) ? "MP2"
: (0x00ff == audio_format) || (0x706d == audio_format) ? "AAC"
: (0x566f == audio_format) ? "Vorbis"
: (boost::format("unsupported (0x%|1$04x|)") % audio_format).str();
id_result_track(i + 1, ID_RESULT_TRACK_AUDIO, type);
}
}
void
wav_reader_c::identify() {
if (!m_demuxer) {
uint16_t format_tag = get_uint16_le(&m_wheader.common.wFormatTag);
id_result_container_unsupported(m_in->get_file_name(), (boost::format("RIFF WAVE (wFormatTag = 0x%|1$04x|)") % format_tag).str());
return;
}
std::vector<std::string> verbose_info;
verbose_info.push_back((boost::format("channels:%1%") % get_uint16_le(&m_wheader.common.wChannels)).str());
verbose_info.push_back((boost::format("sample_rate:%1%") % get_uint32_le(&m_wheader.common.dwSamplesPerSec)).str());
verbose_info.push_back((boost::format("bits_per_sample:%1%") % get_uint16_le(&m_wheader.common.wBitsPerSample)).str());
id_result_container();
id_result_track(0, ID_RESULT_TRACK_AUDIO, m_demuxer->m_codec.get_name(), verbose_info);
}
uint16_t
mm_io_c::read_uint16_le() {
unsigned char buffer[2];
if (read(buffer, 2) != 2)
throw mtx::mm_io::end_of_file_x();
return get_uint16_le(buffer);
}
void
tta_reader_c::read_headers() {
if (g_identifying)
return;
try {
int tag_size = skip_id3v2_tag(*m_in);
if (0 > tag_size)
mxerror_fn(m_ti.m_fname, boost::format(Y("tta_reader: tag_size < 0 in the c'tor. %1%\n")) % BUGMSG);
m_size -= tag_size;
if (m_in->read(&header, sizeof(tta_file_header_t)) != sizeof(tta_file_header_t))
mxerror_fn(m_ti.m_fname, Y("The file header is too short.\n"));
uint64_t seek_sum = m_in->getFilePointer() + 4 - tag_size;
m_size -= id3_tag_present_at_end(*m_in);
uint32_t seek_point;
do {
seek_point = m_in->read_uint32_le();
seek_sum += seek_point + 4;
seek_points.push_back(seek_point);
} while (seek_sum < m_size);
mxverb(2,
boost::format("tta: ch %1% bps %2% sr %3% dl %4% seek_sum %5% size %6% num %7%\n")
% get_uint16_le(&header.channels) % get_uint16_le(&header.bits_per_sample)
% get_uint32_le(&header.sample_rate) % get_uint32_le(&header.data_length)
% seek_sum % m_size % seek_points.size());
if (seek_sum != m_size)
mxerror_fn(m_ti.m_fname, Y("The seek table in this TTA file seems to be broken.\n"));
m_in->skip(4);
pos = 0;
m_ti.m_id = 0; // ID for this track.
} catch (...) {
throw mtx::input::open_x();
}
show_demuxer_info();
}
void
ivf_reader_c::read_headers() {
try {
ivf::file_header_t header;
m_in->read(&header, sizeof(ivf::file_header_t));
m_width = get_uint16_le(&header.width);
m_height = get_uint16_le(&header.height);
m_frame_rate_num = get_uint32_le(&header.frame_rate_num);
m_frame_rate_den = get_uint32_le(&header.frame_rate_den);
m_ti.m_id = 0; // ID for this track.
} catch (...) {
throw mtx::input::open_x();
}
show_demuxer_info();
}
void
wav_reader_c::identify() {
if (m_demuxer) {
id_result_container();
id_result_track(0, ID_RESULT_TRACK_AUDIO, m_demuxer->get_codec());
} else {
uint16_t format_tag = get_uint16_le(&m_wheader.common.wFormatTag);
id_result_container_unsupported(m_in->get_file_name(), (boost::format("RIFF WAVE (wFormatTag = 0x%|1$04x|)") % format_tag).str());
}
}
void
avi_reader_c::identify_audio() {
int i;
for (i = 0; i < AVI_audio_tracks(m_avi); i++) {
AVI_set_audio_track(m_avi, i);
auto info = mtx::id::info_c{};
info.add(mtx::id::audio_channels, AVI_audio_channels(m_avi));
info.add(mtx::id::audio_sampling_frequency, AVI_audio_rate(m_avi));
info.add(mtx::id::audio_bits_per_sample, AVI_audio_bits(m_avi));
unsigned int audio_format = AVI_audio_format(m_avi);
alWAVEFORMATEX *wfe = m_avi->wave_format_ex[i];
if ((0xfffe == audio_format) && (get_uint16_le(&wfe->cb_size) >= (sizeof(alWAVEFORMATEXTENSION)))) {
alWAVEFORMATEXTENSIBLE *ext = reinterpret_cast<alWAVEFORMATEXTENSIBLE *>(wfe);
audio_format = get_uint32_le(&ext->extension.guid.data1);
}
auto codec = codec_c::look_up_audio_format(audio_format);
id_result_track(i + 1, ID_RESULT_TRACK_AUDIO, codec.get_name((boost::format("unsupported (0x%|1$04x|)") % audio_format).str()), info.get());
}
}
void
avi_reader_c::add_audio_demuxer(int aid) {
for (auto &demuxer : m_audio_demuxers)
if (demuxer.m_aid == aid) // Demuxer already added?
return;
AVI_set_audio_track(m_avi, aid);
if (AVI_read_audio_chunk(m_avi, nullptr) < 0) {
mxwarn(boost::format(Y("Could not find an index for audio track %1% (avilib error message: %2%). Skipping track.\n")) % (aid + 1) % AVI_strerror());
return;
}
avi_demuxer_t demuxer;
generic_packetizer_c *packetizer = nullptr;
alWAVEFORMATEX *wfe = m_avi->wave_format_ex[aid];
uint32_t audio_format = AVI_audio_format(m_avi);
demuxer.m_aid = aid;
demuxer.m_ptzr = -1;
demuxer.m_samples_per_second = AVI_audio_rate(m_avi);
demuxer.m_channels = AVI_audio_channels(m_avi);
demuxer.m_bits_per_sample = AVI_audio_bits(m_avi);
m_ti.m_id = aid + 1; // ID for this audio track.
m_ti.m_avi_block_align = get_uint16_le(&wfe->n_block_align);
m_ti.m_avi_avg_bytes_per_sec = get_uint32_le(&wfe->n_avg_bytes_per_sec);
m_ti.m_avi_samples_per_chunk = get_uint32_le(&m_avi->stream_headers[aid].dw_scale);
m_ti.m_avi_sample_scale = get_uint32_le(&m_avi->stream_headers[aid].dw_rate);
m_ti.m_avi_samples_per_sec = demuxer.m_samples_per_second;
if ((0xfffe == audio_format) && (get_uint16_le(&wfe->cb_size) >= (sizeof(alWAVEFORMATEXTENSION)))) {
alWAVEFORMATEXTENSIBLE *ext = reinterpret_cast<alWAVEFORMATEXTENSIBLE *>(wfe);
audio_format = get_uint32_le(&ext->extension.guid.data1);
} else if (get_uint16_le(&wfe->cb_size) > 0)
m_ti.m_private_data = memory_c::clone(wfe + 1, get_uint16_le(&wfe->cb_size));
else
m_ti.m_private_data.reset();
switch(audio_format) {
case 0x0001: // raw PCM audio
case 0x0003: // raw PCM audio (float)
packetizer = new pcm_packetizer_c(this, m_ti, demuxer.m_samples_per_second, demuxer.m_channels, demuxer.m_bits_per_sample, 0x0003 == audio_format ? pcm_packetizer_c::ieee_float : pcm_packetizer_c::little_endian_integer);
break;
case 0x0050: // MP2
case 0x0055: // MP3
packetizer = new mp3_packetizer_c(this, m_ti, demuxer.m_samples_per_second, demuxer.m_channels, false);
break;
case 0x2000: // AC3
packetizer = new ac3_packetizer_c(this, m_ti, demuxer.m_samples_per_second, demuxer.m_channels, 0);
break;
case 0x2001: // DTS
packetizer = create_dts_packetizer(aid);
break;
case 0x00ff:
case 0x706d: // AAC
packetizer = create_aac_packetizer(aid, demuxer);
break;
case 0x566f: // Vorbis
packetizer = create_vorbis_packetizer(aid);
break;
default:
mxerror_tid(m_ti.m_fname, aid + 1, boost::format(Y("Unknown/unsupported audio format 0x%|1$04x| for this audio track.\n")) % audio_format);
}
show_packetizer_info(aid + 1, packetizer);
demuxer.m_ptzr = add_packetizer(packetizer);
m_audio_demuxers.push_back(demuxer);
int i, maxchunks = AVI_audio_chunks(m_avi);
for (i = 0; i < maxchunks; i++)
m_bytes_to_process += AVI_audio_size(m_avi, i);
}
int16_t get_int16_le(uint8_t *buffer)
{
return((int16_t)get_uint16_le(buffer));
}
void
avi_reader_c::add_audio_demuxer(int aid) {
for (auto &demuxer : m_audio_demuxers)
if (demuxer.m_aid == aid) // Demuxer already added?
return;
AVI_set_audio_track(m_avi, aid);
if (AVI_read_audio_chunk(m_avi, nullptr) < 0) {
mxwarn(boost::format(Y("Could not find an index for audio track %1% (avilib error message: %2%). Skipping track.\n")) % (aid + 1) % AVI_strerror());
return;
}
avi_demuxer_t demuxer;
generic_packetizer_c *packetizer = nullptr;
alWAVEFORMATEX *wfe = m_avi->wave_format_ex[aid];
uint32_t audio_format = AVI_audio_format(m_avi);
demuxer.m_aid = aid;
demuxer.m_ptzr = -1;
demuxer.m_samples_per_second = AVI_audio_rate(m_avi);
demuxer.m_channels = AVI_audio_channels(m_avi);
demuxer.m_bits_per_sample = AVI_audio_bits(m_avi);
m_ti.m_id = aid + 1; // ID for this audio track.
auto stream_header = &m_avi->stream_headers[aid];
auto dw_scale = static_cast<int64_t>(get_uint32_le(&stream_header->dw_scale));
auto dw_rate = static_cast<int64_t>(get_uint32_le(&stream_header->dw_rate));
auto dw_sample_size = static_cast<int64_t>(get_uint32_le(&stream_header->dw_sample_size));
m_ti.m_avi_audio_data_rate = dw_scale ? dw_rate * dw_sample_size / dw_scale : 0;
if ((0xfffe == audio_format) && (get_uint16_le(&wfe->cb_size) >= (sizeof(alWAVEFORMATEXTENSION)))) {
alWAVEFORMATEXTENSIBLE *ext = reinterpret_cast<alWAVEFORMATEXTENSIBLE *>(wfe);
audio_format = get_uint32_le(&ext->extension.guid.data1);
} else if (get_uint16_le(&wfe->cb_size) > 0)
m_ti.m_private_data = memory_c::clone(wfe + 1, get_uint16_le(&wfe->cb_size));
else
m_ti.m_private_data.reset();
demuxer.m_codec = codec_c::look_up_audio_format(audio_format);
if (demuxer.m_codec.is(codec_c::type_e::A_PCM))
packetizer = new pcm_packetizer_c(this, m_ti, demuxer.m_samples_per_second, demuxer.m_channels, demuxer.m_bits_per_sample, 0x0003 == audio_format ? pcm_packetizer_c::ieee_float : pcm_packetizer_c::little_endian_integer);
else if (demuxer.m_codec.is(codec_c::type_e::A_MP2) || demuxer.m_codec.is(codec_c::type_e::A_MP3))
packetizer = new mp3_packetizer_c(this, m_ti, demuxer.m_samples_per_second, demuxer.m_channels, false);
else if (demuxer.m_codec.is(codec_c::type_e::A_AC3))
packetizer = new ac3_packetizer_c(this, m_ti, demuxer.m_samples_per_second, demuxer.m_channels, 0);
else if (demuxer.m_codec.is(codec_c::type_e::A_DTS))
packetizer = create_dts_packetizer(aid);
else if (demuxer.m_codec.is(codec_c::type_e::A_AAC))
packetizer = create_aac_packetizer(aid, demuxer);
else if (demuxer.m_codec.is(codec_c::type_e::A_VORBIS))
packetizer = create_vorbis_packetizer(aid);
else
mxerror_tid(m_ti.m_fname, aid + 1, boost::format(Y("Unknown/unsupported audio format 0x%|1$04x| for this audio track.\n")) % audio_format);
packetizer->enable_avi_audio_sync(true);
show_packetizer_info(aid + 1, packetizer);
demuxer.m_ptzr = add_packetizer(packetizer);
m_audio_demuxers.push_back(demuxer);
int i, maxchunks = AVI_audio_chunks(m_avi);
for (i = 0; i < maxchunks; i++) {
auto size = AVI_audio_size(m_avi, i);
if (size < AVI_MAX_AUDIO_CHUNK_SIZE)
m_bytes_to_process += size;
}
}
