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);
}
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;
}
}
