void
theora_video_packetizer_c::extract_aspect_ratio() {
if (display_dimensions_or_aspect_ratio_set() || (NULL == m_ti.m_private_data) || (0 == m_ti.m_private_size))
return;
memory_cptr private_data = memory_cptr(new memory_c(m_ti.m_private_data, m_ti.m_private_size, false));
std::vector<memory_cptr> packets = unlace_memory_xiph(private_data);
for (auto &packet : packets) {
if ((0 == packet->get_size()) || (THEORA_HEADERTYPE_IDENTIFICATION != packet->get_buffer()[0]))
continue;
try {
theora_identification_header_t theora;
theora_parse_identification_header(packet->get_buffer(), packet->get_size(), theora);
if ((0 == theora.display_width) || (0 == theora.display_height))
return;
set_video_display_dimensions(theora.display_width, theora.display_height, PARAMETER_SOURCE_BITSTREAM);
mxinfo_tid(m_ti.m_fname, m_ti.m_id,
boost::format(Y("Extracted the aspect ratio information from the Theora video headers and set the display dimensions to %1%/%2%.\n"))
% theora.display_width % theora.display_height);
} catch (...) {
}
return;
}
}
void
xtr_oggbase_c::create_standard_file(xtr_base_c *master,
KaxTrackEntry &track,
LacingType lacing) {
KaxCodecPrivate *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);
init_content_decoder(track);
memory_cptr mpriv = decode_codec_private(priv);
std::vector<memory_cptr> header_packets;
try {
if (lacing == LACING_NONE)
header_packets.push_back(mpriv);
else {
header_packets = unlace_memory_xiph(mpriv);
if (header_packets.empty())
throw false;
}
header_packets_unlaced(header_packets);
} catch (...) {
mxerror(boost::format(Y("Track %1% with the CodecID '%2%' does not contain valid headers.\n")) % m_tid % m_codec_id);
}
xtr_oggbase_c::create_file(master, track);
ogg_packet op;
for (m_packetno = 0; header_packets.size() > m_packetno; ++m_packetno) {
// Handle all the header packets: ID header, comments, etc
op.b_o_s = (0 == m_packetno ? 1 : 0);
op.e_o_s = 0;
op.packetno = m_packetno;
op.packet = header_packets[m_packetno]->get_buffer();
op.bytes = header_packets[m_packetno]->get_size();
op.granulepos = 0;
ogg_stream_packetin(&m_os, &op);
if (0 == m_packetno) /* ID header must be alone on a separate page */
flush_pages();
}
/* flush at last header, data must start on a new page */
flush_pages();
}