int
mm_io_c::write_uint32_be(uint32_t value) {
uint32_t buffer;
put_uint32_be(&buffer, value);
return write(&buffer, sizeof(uint32_t));
}
std::string
fourcc_c::str()
const {
char buffer[4];
put_uint32_be(buffer, m_value);
for (auto idx = 0; 4 > idx; ++idx)
buffer[idx] = 32 <= buffer[idx] ? buffer[idx] : '?';
return std::string{buffer, 4};
}
std::string
fourcc_to_string(uint32_t fourcc) {
unsigned char buffer[4], idx;
put_uint32_be(buffer, fourcc);
for (idx = 0; 4 > idx; ++idx)
if (buffer[idx] < ' ')
buffer[idx] = ' ';
return std::string(reinterpret_cast<char *>(buffer), 4);
}
std::string
fourcc_c::description()
const {
static auto s_id_fmt = boost::format("0x%|1$08x| \"%2%%3%%4%%5%\"");
static auto s_name_fmt = boost::format(": %1%");
unsigned char buffer[4];
put_uint32_be(buffer, m_value);
auto result = (s_id_fmt % m_value % C(0) % C(1) % C(2) % C(3)).str();
auto codec = codec_c::look_up(*this);
if (codec.valid())
result += (s_name_fmt % codec.get_name()).str();
return result;
}
void
xtr_alac_c::create_file(xtr_base_c *master, KaxTrackEntry &track) {
init_content_decoder(track);
auto channels = kt_get_a_channels(track);
auto priv = FindChild<KaxCodecPrivate>(&track);
if (!priv)
mxerror(boost::format(Y("Track %1% with the CodecID '%2%' is missing the \"codec private\" element and cannot be extracted.\n")) % m_tid % m_codec_id);
m_priv = decode_codec_private(priv);
if (m_priv->get_size() != sizeof(alac::codec_config_t))
mxerror(boost::format(Y("ALAC private data size mismatch\n")));
xtr_base_c::create_file(master, track);
m_out->write(std::string{"caff"}); // mFileType
m_out->write_uint16_be(1); // mFileVersion
m_out->write_uint16_be(0); // mFileFlags
m_out->write(std::string{"desc"}); // Audio Description chunk
m_out->write_uint64_be(32ULL); // mChunkSize
m_out->write_double(static_cast<int>(kt_get_a_sfreq(track))); // mSampleRate
m_out->write(std::string{"alac"}); // mFormatID
m_out->write_uint32_be(0); // mFormatFlags
m_out->write_uint32_be(0); // mBytesPerPacket
m_out->write_uint32_be(caf::defs::default_frames_per_packet); // mFramesPerPacket
m_out->write_uint32_be(channels); // mChannelsPerFrame
m_out->write_uint32_be(0); // mBitsPerChannel
auto kuki_size = 12 + 36 + 8 + (2 < channels ? 24 : 0); // add the size of ALACChannelLayoutInfo for more than 2 channels
m_out->write(std::string{"kuki"});
m_out->write_uint64_be(kuki_size);
m_out->write_uint8('\0');
m_out->write_uint8('\0');
m_out->write_uint8('\0');
m_out->write_uint8('\14');
m_out->write(std::string{"frma"});
m_out->write(std::string{"alac"});
m_out->write_uint32_be(12 + sizeof(alac::codec_config_t)); // ALAC Specific Info size = 36 (12 + sizeof(ALAXSpecificConfig))
m_out->write(std::string{"alac"}); // ALAC Specific Info ID
m_out->write_uint32_be(0L); // Version Flags
m_out->write(m_priv); // audio specific config
auto alo = caf::channel_layout_t();
if (2 < channels) {
switch (channels) {
case 3:
alo.channel_layout_tag = caf::channel_layout_t::mpeg_3_0_b;
alo.channel_bitmap = caf::channel_layout_t::left | caf::channel_layout_t::right | caf::channel_layout_t::center;
break;
case 4:
alo.channel_layout_tag = caf::channel_layout_t::mpeg_4_0_b;
alo.channel_bitmap = caf::channel_layout_t::left | caf::channel_layout_t::right | caf::channel_layout_t::center | caf::channel_layout_t::center_surround;
break;
case 5:
alo.channel_layout_tag = caf::channel_layout_t::mpeg_5_0_d;
alo.channel_bitmap = caf::channel_layout_t::left | caf::channel_layout_t::right | caf::channel_layout_t::center | caf::channel_layout_t::left_surround | caf::channel_layout_t::right_surround;
break;
case 6:
alo.channel_layout_tag = caf::channel_layout_t::mpeg_5_1_d;
alo.channel_bitmap = caf::channel_layout_t::left | caf::channel_layout_t::right | caf::channel_layout_t::center | caf::channel_layout_t::left_surround | caf::channel_layout_t::right_surround | caf::channel_layout_t::lfe_screen;
break;
case 7:
alo.channel_layout_tag = caf::channel_layout_t::aac_6_1;
alo.channel_bitmap = caf::channel_layout_t::left | caf::channel_layout_t::right | caf::channel_layout_t::center | caf::channel_layout_t::left_surround
| caf::channel_layout_t::right_surround | caf::channel_layout_t::center_surround | caf::channel_layout_t::lfe_screen;
break;
case 8:
alo.channel_layout_tag = caf::channel_layout_t::mpeg_7_1_b;
alo.channel_bitmap = caf::channel_layout_t::left | caf::channel_layout_t::right | caf::channel_layout_t::center | caf::channel_layout_t::left_center
| caf::channel_layout_t::right_center | caf::channel_layout_t::left_surround | caf::channel_layout_t::right_surround | caf::channel_layout_t::lfe_screen;
break;
}
auto acli = caf::channel_layout_info_t();
put_uint32_be(&acli.channel_layout_info_size, 24); // = sizeof(ALACChannelLayoutInfo)
put_uint32_be(&acli.channel_layout_info_id, FOURCC('c', 'h', 'a', 'n')); // = 'chan'
put_uint32_be(&acli.channel_layout_tag, alo.channel_layout_tag);
m_out->write(&acli, sizeof(acli));
}
// Terminator atom
m_out->write_uint32_be(8); // Channel Layout Info Size
m_out->write_uint32_be(0); // Channel Layout Info ID
if (2 < channels) {
m_out->write(std::string{"chan"}); // 'chan' chunk immediately following the kuki
m_out->write_uint64_be(12ULL); // = sizeof(ALACAudioChannelLayout)
m_out->write_uint32_be(alo.channel_layout_tag);
m_out->write_uint32_be(alo.channel_bitmap);
m_out->write_uint32_be(alo.number_channel_descriptions);
}
m_free_chunk_offset = m_out->getFilePointer(); // remember the location of
m_free_chunk_size = 16384;
auto free_chunk = memory_c::alloc(m_free_chunk_size);
memset(free_chunk->get_buffer(), 0, sizeof(m_free_chunk_size));
// the 'free' chunk
m_out->write(std::string{"free"});
m_out->write_uint64_be(m_free_chunk_size);
m_out->write(free_chunk);
m_data_chunk_offset = m_out->getFilePointer();
m_out->write(std::string{"data"}); // Audio Data Chunk
m_out->write_uint64_be(-1LL); // mChunkSize (= -1 if unknown)
m_out->write_uint32_be(1); // mEditCount
}
file_status_e
avi_reader_c::read_video() {
if (m_video_frames_read >= m_max_video_frames)
return flush_packetizer(m_vptzr);
memory_cptr chunk;
int key = 0;
int old_video_frames_read = m_video_frames_read;
int size, num_read;
int dropped_frames_here = 0;
do {
size = AVI_frame_size(m_avi, m_video_frames_read);
chunk = memory_c::alloc(size);
num_read = AVI_read_frame(m_avi, reinterpret_cast<char *>(chunk->get_buffer()), &key);
++m_video_frames_read;
if (0 > num_read) {
// Error reading the frame: abort
m_video_frames_read = m_max_video_frames;
return flush_packetizer(m_vptzr);
} else if (0 == num_read)
++dropped_frames_here;
} while ((0 == num_read) && (m_video_frames_read < m_max_video_frames));
if (0 == num_read)
// This is only the case if the AVI contains dropped frames only.
return flush_packetizer(m_vptzr);
size_t i;
for (i = m_video_frames_read; i < m_max_video_frames; ++i) {
if (0 != AVI_frame_size(m_avi, i))
break;
int dummy_key;
AVI_read_frame(m_avi, nullptr, &dummy_key);
++dropped_frames_here;
++m_video_frames_read;
}
int64_t timestamp = static_cast<int64_t>(static_cast<int64_t>(old_video_frames_read) * 1000000000ll / m_fps);
int64_t duration = static_cast<int64_t>(static_cast<int64_t>(dropped_frames_here + 1) * 1000000000ll / m_fps);
m_dropped_video_frames += dropped_frames_here;
// AVC with framed packets (without NALU start codes but with length fields)
// or non-AVC video track?
if (0 >= m_avc_nal_size_size)
PTZR(m_vptzr)->process(new packet_t(chunk, timestamp, duration, key ? VFT_IFRAME : VFT_PFRAMEAUTOMATIC, VFT_NOBFRAME));
else {
// AVC video track without NALU start codes. Re-frame with NALU start codes.
int offset = 0;
while ((offset + m_avc_nal_size_size) < num_read) {
int nalu_size = get_uint_be(chunk->get_buffer() + offset, m_avc_nal_size_size);
offset += m_avc_nal_size_size;
if ((offset + nalu_size) > num_read)
break;
memory_cptr nalu = memory_c::alloc(4 + nalu_size);
put_uint32_be(nalu->get_buffer(), NALU_START_CODE);
memcpy(nalu->get_buffer() + 4, chunk->get_buffer() + offset, nalu_size);
offset += nalu_size;
PTZR(m_vptzr)->process(new packet_t(nalu, timestamp, duration, key ? VFT_IFRAME : VFT_PFRAMEAUTOMATIC, VFT_NOBFRAME));
}
}
m_bytes_processed += num_read;
return m_video_frames_read >= m_max_video_frames ? flush_packetizer(m_vptzr) : FILE_STATUS_MOREDATA;
}
dts_compressor_c::dts_compressor_c() {
memory_cptr bytes = memory_c::alloc(4);
put_uint32_be(bytes->get_buffer(), DTS_HEADER_MAGIC);
set_bytes(bytes);
}
dirac_compressor_c::dirac_compressor_c() {
memory_cptr bytes = memory_c::alloc(4);
put_uint32_be(bytes->get_buffer(), DIRAC_SYNC_WORD);
set_bytes(bytes);
}
size_t
fourcc_c::write(unsigned char *mem,
fourcc_c::byte_order_t byte_order) {
put_uint32_be(mem, val(m_value, byte_order));
return 4;
}
