bool
mpeg1_2_video_packetizer_c::put_sequence_headers_into_codec_state(packet_cptr packet) {
unsigned char *buf = packet->data->get_buffer();
size_t pos = 4;
size_t size = packet->data->get_size();
unsigned int marker = get_uint32_be(buf);
while ((pos < size) && (MPEGVIDEO_SEQUENCE_START_CODE != marker)) {
marker <<= 8;
marker |= buf[pos];
++pos;
}
if ((MPEGVIDEO_SEQUENCE_START_CODE != marker) || ((pos + 4) >= size))
return false;
size_t start = pos - 4;
marker = get_uint32_be(&buf[pos]);
pos += 4;
while ((pos < size) && ((MPEGVIDEO_EXT_START_CODE == marker) || (0x00000100 != (marker & 0xffffff00)))) {
marker <<= 8;
marker |= buf[pos];
++pos;
}
if (pos >= size)
return false;
pos -= 4;
size_t sh_size = pos - start;
if (NULL == m_hcodec_private) {
set_codec_private(&buf[start], sh_size);
rerender_track_headers();
}
if (!m_seq_hdr.is_set() || (sh_size != m_seq_hdr->get_size()) || memcmp(&buf[start], m_seq_hdr->get_buffer(), sh_size)) {
m_seq_hdr = clone_memory(&buf[start], sh_size);
packet->codec_state = clone_memory(&buf[start], sh_size);
}
if (hack_engaged(ENGAGE_USE_CODEC_STATE_ONLY)) {
memmove(&buf[start], &buf[pos], size - pos);
packet->data->set_size(size - sh_size);
}
return true;
}
void
xtr_oggopus_c::header_packets_unlaced(std::vector<memory_cptr> &header_packets) {
auto signature = std::string{"OpusTags"};
auto version = std::string{"unknown encoder; extracted from Matroska with "} + (!hack_engaged(ENGAGE_NO_VARIABLE_DATA) ? get_version_info("mkvextract") : std::string{"mkvextract"});
auto ver_len = version.length();
auto mem = memory_c::alloc(8 + 4 + ver_len + 4);
auto buffer = reinterpret_cast<char *>(mem->get_buffer());
signature.copy(buffer, 8);
put_uint32_le(buffer + 8, ver_len);
version.copy(buffer + 8 + 4, ver_len);
put_uint32_le(buffer + mem->get_size() - 4, 0);
header_packets.push_back(mem);
}
void
avi_reader_c::create_video_packetizer() {
size_t i;
mxverb_tid(4, m_ti.m_fname, 0, "frame sizes:\n");
for (i = 0; i < m_max_video_frames; i++) {
m_bytes_to_process += AVI_frame_size(m_avi, i);
mxverb(4, boost::format(" %1%: %2%\n") % i % AVI_frame_size(m_avi, i));
}
if (m_avi->bitmap_info_header) {
m_ti.m_private_data = memory_c::clone(m_avi->bitmap_info_header, get_uint32_le(&m_avi->bitmap_info_header->bi_size));
mxverb(4, boost::format("track extra data size: %1%\n") % (m_ti.m_private_data->get_size() - sizeof(alBITMAPINFOHEADER)));
if (sizeof(alBITMAPINFOHEADER) < m_ti.m_private_data->get_size())
mxverb(4, boost::format(" %1%\n") % to_hex(m_ti.m_private_data->get_buffer() + sizeof(alBITMAPINFOHEADER), m_ti.m_private_data->get_size() - sizeof(alBITMAPINFOHEADER)));
}
const char *codec = AVI_video_compressor(m_avi);
if (mpeg4::p2::is_v3_fourcc(codec))
m_divx_type = DIVX_TYPE_V3;
else if (mpeg4::p2::is_fourcc(codec))
m_divx_type = DIVX_TYPE_MPEG4;
if (map_has_key(m_ti.m_default_durations, 0))
m_fps = 1000000000.0 / m_ti.m_default_durations[0];
else if (map_has_key(m_ti.m_default_durations, -1))
m_fps = 1000000000.0 / m_ti.m_default_durations[-1];
m_ti.m_id = 0; // ID for the video track.
if (DIVX_TYPE_MPEG4 == m_divx_type)
create_mpeg4_p2_packetizer();
else if (mpeg4::p10::is_avc_fourcc(codec) && !hack_engaged(ENGAGE_ALLOW_AVC_IN_VFW_MODE))
create_mpeg4_p10_packetizer();
else if (mpeg1_2::is_fourcc(get_uint32_le(codec)))
create_mpeg1_2_packetizer();
else if (FOURCC('V', 'P', '8', '0') == get_uint32_be(codec))
create_vp8_packetizer();
else
create_standard_video_packetizer();
}
uint32_t
create_unique_uint32(unique_id_category_e category) {
assert_valid_category(category);
if (hack_engaged(ENGAGE_NO_VARIABLE_DATA)) {
s_random_unique_numbers[category].push_back(s_random_unique_numbers[category].size() + 1);
return s_random_unique_numbers[category].size();
}
uint32_t random_number;
do {
random_number = random_c::generate_32bits();
} while ((random_number == 0) || !is_unique_uint32(random_number, category));
add_unique_uint32(random_number, category);
return random_number;
}
mpeg4_p2_video_packetizer_c::
mpeg4_p2_video_packetizer_c(generic_reader_c *p_reader,
track_info_c &p_ti,
double fps,
int width,
int height,
bool input_is_native)
: video_packetizer_c(p_reader, p_ti, MKV_V_MPEG4_ASP, fps, width, height)
, m_timecodes_generated(0)
, m_previous_timecode(0)
, m_aspect_ratio_extracted(false)
, m_input_is_native(input_is_native)
, m_output_is_native(hack_engaged(ENGAGE_NATIVE_MPEG4) || input_is_native)
, m_size_extracted(false)
{
if (!m_output_is_native) {
set_codec_id(MKV_V_MSCOMP);
check_fourcc();
m_timecode_factory_application_mode = TFA_SHORT_QUEUEING;
} else {
set_codec_id(MKV_V_MPEG4_ASP);
if (!m_input_is_native)
m_ti.m_private_data.reset();
// If no external timecode file has been specified then mkvmerge
// might have created a factory due to the --default-duration
// command line argument. This factory must be disabled for this
// packetizer because it takes care of handling the default
// duration/FPS itself.
if (m_ti.m_ext_timecodes.empty())
m_timecode_factory.reset();
if (m_default_duration_forced)
m_fps = 1000000000.0 / m_htrack_default_duration;
else if (0.0 != m_fps)
m_htrack_default_duration = static_cast<int64_t>(1000000000ll / m_fps);
m_timecode_factory_application_mode = TFA_FULL_QUEUEING;
}
}
/*
The page is the beginning of a new stream. Check the contents for known
stream headers. If it is a known stream and the user has requested that
it should be extracted then allocate a new packetizer based on the
stream type and store the needed data in a new ogm_demuxer_c.
*/
void
ogm_reader_c::handle_new_stream(ogg_page *og) {
ogg_stream_state os;
ogg_packet op;
if (ogg_stream_init(&os, ogg_page_serialno(og))) {
mxwarn_fn(m_ti.m_fname, boost::format(Y("ogg_stream_init for stream number %1% failed. Will try to continue and ignore this stream.\n")) % sdemuxers.size());
return;
}
// Read the first page and get its first packet.
ogg_stream_pagein(&os, og);
ogg_stream_packetout(&os, &op);
ogm_demuxer_c *dmx = nullptr;
/*
* Check the contents for known stream headers. This one is the
* standard Vorbis header.
*/
if ((7 <= op.bytes) && !strncmp((char *)&op.packet[1], "vorbis", 6))
dmx = new ogm_a_vorbis_demuxer_c(this);
else if ((7 <= op.bytes) && !strncmp((char *)&op.packet[1], "theora", 6))
dmx = new ogm_v_theora_demuxer_c(this);
else if ((8 <= op.bytes) && !memcmp(&op.packet[1], "kate\0\0\0", 7))
dmx = new ogm_s_kate_demuxer_c(this);
// FLAC
else if ( ((4 <= op.bytes) && !strncmp(reinterpret_cast<char *>(&op.packet[0]), "fLaC", 4))
|| ((5 <= op.bytes) && !strncmp(reinterpret_cast<char *>(&op.packet[1]), "FLAC", 4) && (0x7f == op.packet[0]))) {
#if !defined(HAVE_FLAC_FORMAT_H)
if (demuxing_requested('a', sdemuxers.size()))
mxerror_fn(m_ti.m_fname, Y("mkvmerge has not been compiled with FLAC support but handling of this stream has been requested.\n"));
else {
dmx = new ogm_demuxer_c(this);
dmx->stype = OGM_STREAM_TYPE_A_FLAC;
dmx->in_use = true;
}
#else
dmx = new ogm_a_flac_demuxer_c(this, 0x7f == op.packet[0] ? ofm_post_1_1_1 : ofm_pre_1_1_1);
#endif
} else if ((static_cast<size_t>(op.bytes) >= sizeof(vp8_ogg_header_t)) && (0x4f == op.packet[0]) && (get_uint32_be(&op.packet[1]) == 0x56503830))
dmx = new ogm_v_vp8_demuxer_c(this, op);
else if (((*op.packet & PACKET_TYPE_BITS ) == PACKET_TYPE_HEADER) && (op.bytes >= ((int)sizeof(stream_header) + 1))) {
// The new stream headers introduced by OggDS (see ogmstreams.h).
stream_header *sth = (stream_header *)(op.packet + 1);
char buf[5];
buf[4] = 0;
if (!strncmp(sth->streamtype, "video", 5)) {
memcpy(buf, (char *)sth->subtype, 4);
if (mpeg4::p10::is_avc_fourcc(buf) && !hack_engaged(ENGAGE_ALLOW_AVC_IN_VFW_MODE))
dmx = new ogm_v_avc_demuxer_c(this);
else
dmx = new ogm_v_mscomp_demuxer_c(this);
} else if (!strncmp(sth->streamtype, "audio", 5)) {
memcpy(buf, (char *)sth->subtype, 4);
uint32_t codec_id = strtol(buf, (char **)nullptr, 16);
if (0x0001 == codec_id)
dmx = new ogm_a_pcm_demuxer_c(this);
else if ((0x0050 == codec_id) || (0x0055 == codec_id))
dmx = new ogm_a_mp3_demuxer_c(this);
else if (0x2000 == codec_id)
dmx = new ogm_a_ac3_demuxer_c(this);
else if (0x00ff == codec_id)
dmx = new ogm_a_aac_demuxer_c(this);
else
mxwarn_fn(m_ti.m_fname, boost::format(Y("Unknown audio stream type 0x%|1$04x|. Stream ID %2% will be ignored.\n")) % codec_id % sdemuxers.size());
} else if (!strncmp(sth->streamtype, "text", 4))
dmx = new ogm_s_text_demuxer_c(this);
}
/*
* The old OggDS headers (see MPlayer's source, libmpdemux/demux_ogg.c)
* are not supported.
*/
if (!dmx)
dmx = new ogm_demuxer_c(this);
std::string type = dmx->get_type();
dmx->serialno = ogg_page_serialno(og);
dmx->track_id = sdemuxers.size();
dmx->in_use = (type != "unknown") && demuxing_requested(type[0], dmx->track_id);
dmx->packet_data.push_back(memory_cptr(new memory_c((unsigned char *)safememdup(op.packet, op.bytes), op.bytes, true)));
memcpy(&dmx->os, &os, sizeof(ogg_stream_state));
sdemuxers.push_back(ogm_demuxer_cptr(dmx));
dmx->initialize();
}
void
generic_packetizer_c::add_packet2(packet_cptr pack) {
if (pack->has_discard_padding())
set_required_matroska_version(4);
pack->timecode = ADJUST_TIMECODE(pack->timecode);
if (pack->has_bref())
pack->bref = ADJUST_TIMECODE(pack->bref);
if (pack->has_fref())
pack->fref = ADJUST_TIMECODE(pack->fref);
if (pack->has_duration()) {
pack->duration = static_cast<int64_t>(pack->duration * m_ti.m_tcsync.numerator / m_ti.m_tcsync.denominator);
if (pack->has_discard_padding())
pack->duration -= std::min(pack->duration, pack->discard_padding.to_ns());
}
if ((2 > m_htrack_min_cache) && pack->has_fref()) {
set_track_min_cache(2);
rerender_track_headers();
} else if ((1 > m_htrack_min_cache) && pack->has_bref()) {
set_track_min_cache(1);
rerender_track_headers();
}
if (0 > pack->timecode)
return;
// 'timecode < safety_last_timecode' may only occur for B frames. In this
// case we have the coding order, e.g. IPB1B2 and the timecodes
// I: 0, P: 120, B1: 40, B2: 80.
if (!m_relaxed_timecode_checking && (pack->timecode < m_safety_last_timecode) && (0 > pack->fref) && hack_engaged(ENGAGE_ENABLE_TIMECODE_WARNING)) {
if (track_audio == m_htrack_type) {
int64_t needed_timecode_offset = m_safety_last_timecode + m_safety_last_duration - pack->timecode;
m_correction_timecode_offset += needed_timecode_offset;
pack->timecode += needed_timecode_offset;
if (pack->has_bref())
pack->bref += needed_timecode_offset;
if (pack->has_fref())
pack->fref += needed_timecode_offset;
mxwarn_tid(m_ti.m_fname, m_ti.m_id,
boost::format(Y("The current packet's timecode is smaller than that of the previous packet. "
"This usually means that the source file is a Matroska file that has not been created 100%% correctly. "
"The timecodes of all packets will be adjusted by %1%ms in order not to lose any data. "
"This may throw audio/video synchronization off, but that can be corrected with mkvmerge's \"--sync\" option. "
"If you already use \"--sync\" and you still get this warning then do NOT worry -- this is normal. "
"If this error happens more than once and you get this message more than once for a particular track "
"then either is the source file badly mastered, or mkvmerge contains a bug. "
"In this case you should contact the author Moritz Bunkus <*****@*****.**>.\n"))
% ((needed_timecode_offset + 500000) / 1000000));
} else
mxwarn_tid(m_ti.m_fname, m_ti.m_id,
boost::format("generic_packetizer_c::add_packet2: timecode < last_timecode (%1% < %2%). %3%\n")
% format_timestamp(pack->timecode) % format_timestamp(m_safety_last_timecode) % BUGMSG);
}
m_safety_last_timecode = pack->timecode;
m_safety_last_duration = pack->duration;
pack->timecode_before_factory = pack->timecode;
m_packet_queue.push_back(pack);
if (!m_timestamp_factory || (TFA_IMMEDIATE == m_timestamp_factory_application_mode))
apply_factory_once(pack);
else
apply_factory();
}
int
cluster_helper_c::render() {
std::vector<render_groups_cptr> render_groups;
KaxCues cues;
cues.SetGlobalTimecodeScale(g_timecode_scale);
bool use_simpleblock = !hack_engaged(ENGAGE_NO_SIMPLE_BLOCKS);
LacingType lacing_type = hack_engaged(ENGAGE_LACING_XIPH) ? LACING_XIPH : hack_engaged(ENGAGE_LACING_EBML) ? LACING_EBML : LACING_AUTO;
int64_t min_cl_timecode = std::numeric_limits<int64_t>::max();
int64_t max_cl_timecode = 0;
int elements_in_cluster = 0;
bool added_to_cues = false;
// Splitpoint stuff
if ((-1 == m->header_overhead) && splitting())
m->header_overhead = m->out->getFilePointer() + g_tags_size;
// Make sure that we don't have negative/wrapped around timecodes in the output file.
// Can happend when we're splitting; so adjust timecode_offset accordingly.
m->timecode_offset = boost::accumulate(m->packets, m->timecode_offset, [](int64_t a, const packet_cptr &p) { return std::min(a, p->assigned_timecode); });
int64_t timecode_offset = m->timecode_offset + get_discarded_duration();
for (auto &pack : m->packets) {
generic_packetizer_c *source = pack->source;
bool has_codec_state = !!pack->codec_state;
if (g_video_packetizer == source)
m->max_video_timecode_rendered = std::max(pack->assigned_timecode + pack->get_duration(), m->max_video_timecode_rendered);
if (discarding()) {
if (-1 == m->first_discarded_timecode)
m->first_discarded_timecode = pack->assigned_timecode;
m->last_discarded_timecode_and_duration = std::max(m->last_discarded_timecode_and_duration, pack->assigned_timecode + pack->get_duration());
continue;
}
if (source->contains_gap())
m->cluster->SetSilentTrackUsed();
render_groups_c *render_group = nullptr;
for (auto &rg : render_groups)
if (rg->m_source == source) {
render_group = rg.get();
break;
}
if (!render_group) {
render_groups.push_back(render_groups_cptr(new render_groups_c(source)));
render_group = render_groups.back().get();
}
min_cl_timecode = std::min(pack->assigned_timecode, min_cl_timecode);
max_cl_timecode = std::max(pack->assigned_timecode, max_cl_timecode);
DataBuffer *data_buffer = new DataBuffer((binary *)pack->data->get_buffer(), pack->data->get_size());
KaxTrackEntry &track_entry = static_cast<KaxTrackEntry &>(*source->get_track_entry());
kax_block_blob_c *previous_block_group = !render_group->m_groups.empty() ? render_group->m_groups.back().get() : nullptr;
kax_block_blob_c *new_block_group = previous_block_group;
if (!pack->is_key_frame() || has_codec_state || pack->has_discard_padding())
render_group->m_more_data = false;
if (!render_group->m_more_data) {
set_duration(render_group);
render_group->m_durations.clear();
render_group->m_duration_mandatory = false;
BlockBlobType this_block_blob_type
= !use_simpleblock ? BLOCK_BLOB_NO_SIMPLE
: must_duration_be_set(render_group, pack) ? BLOCK_BLOB_NO_SIMPLE
: !pack->data_adds.empty() ? BLOCK_BLOB_NO_SIMPLE
: has_codec_state ? BLOCK_BLOB_NO_SIMPLE
: pack->has_discard_padding() ? BLOCK_BLOB_NO_SIMPLE
: BLOCK_BLOB_ALWAYS_SIMPLE;
render_group->m_groups.push_back(kax_block_blob_cptr(new kax_block_blob_c(this_block_blob_type)));
new_block_group = render_group->m_groups.back().get();
m->cluster->AddBlockBlob(new_block_group);
new_block_group->SetParent(*m->cluster);
added_to_cues = false;
}
// Now put the packet into the cluster.
render_group->m_more_data = new_block_group->add_frame_auto(track_entry, pack->assigned_timecode - timecode_offset, *data_buffer, lacing_type,
pack->has_bref() ? pack->bref - timecode_offset : -1,
pack->has_fref() ? pack->fref - timecode_offset : -1);
if (has_codec_state) {
KaxBlockGroup &bgroup = (KaxBlockGroup &)*new_block_group;
KaxCodecState *cstate = new KaxCodecState;
bgroup.PushElement(*cstate);
cstate->CopyBuffer(pack->codec_state->get_buffer(), pack->codec_state->get_size());
}
if (-1 == m->first_timecode_in_file)
m->first_timecode_in_file = pack->assigned_timecode;
if (-1 == m->first_timecode_in_part)
m->first_timecode_in_part = pack->assigned_timecode;
m->min_timecode_in_file = std::min(timecode_c::ns(pack->assigned_timecode), m->min_timecode_in_file.value_or_max());
m->max_timecode_in_file = std::max(pack->assigned_timecode, m->max_timecode_in_file);
m->max_timecode_and_duration = std::max(pack->assigned_timecode + pack->get_duration(), m->max_timecode_and_duration);
if (!pack->is_key_frame() || !track_entry.LacingEnabled())
render_group->m_more_data = false;
render_group->m_durations.push_back(pack->get_unmodified_duration());
render_group->m_duration_mandatory |= pack->duration_mandatory;
cues_c::get().set_duration_for_id_timecode(source->get_track_num(), pack->assigned_timecode - timecode_offset, pack->get_duration());
if (new_block_group) {
// Set the reference priority if it was wanted.
if ((0 < pack->ref_priority) && new_block_group->replace_simple_by_group())
GetChild<KaxReferencePriority>(*new_block_group).SetValue(pack->ref_priority);
// Handle BlockAdditions if needed
if (!pack->data_adds.empty() && new_block_group->ReplaceSimpleByGroup()) {
KaxBlockAdditions &additions = AddEmptyChild<KaxBlockAdditions>(*new_block_group);
size_t data_add_idx;
for (data_add_idx = 0; pack->data_adds.size() > data_add_idx; ++data_add_idx) {
auto &block_more = AddEmptyChild<KaxBlockMore>(additions);
GetChild<KaxBlockAddID >(block_more).SetValue(data_add_idx + 1);
GetChild<KaxBlockAdditional>(block_more).CopyBuffer((binary *)pack->data_adds[data_add_idx]->get_buffer(), pack->data_adds[data_add_idx]->get_size());
}
}
if (pack->has_discard_padding())
GetChild<KaxDiscardPadding>(*new_block_group).SetValue(pack->discard_padding.to_ns());
}
elements_in_cluster++;
if (!new_block_group)
new_block_group = previous_block_group;
else if (g_write_cues && (!added_to_cues || has_codec_state)) {
added_to_cues = add_to_cues_maybe(pack);
if (added_to_cues)
cues.AddBlockBlob(*new_block_group);
}
pack->group = new_block_group;
m->track_statistics[ source->get_uid() ].process(*pack);
}
if (!discarding()) {
if (0 < elements_in_cluster) {
for (auto &rg : render_groups)
set_duration(rg.get());
m->cluster->SetPreviousTimecode(min_cl_timecode - timecode_offset - 1, (int64_t)g_timecode_scale);
m->cluster->set_min_timecode(min_cl_timecode - timecode_offset);
m->cluster->set_max_timecode(max_cl_timecode - timecode_offset);
m->cluster->Render(*m->out, cues);
m->bytes_in_file += m->cluster->ElementSize();
if (g_kax_sh_cues)
g_kax_sh_cues->IndexThis(*m->cluster, *g_kax_segment);
m->previous_cluster_tc = m->cluster->GlobalTimecode();
cues_c::get().postprocess_cues(cues, *m->cluster);
} else
m->previous_cluster_tc = -1;
}
m->min_timecode_in_cluster = -1;
m->max_timecode_in_cluster = -1;
m->cluster->delete_non_blocks();
return 1;
}
void
mpeg1_2_video_packetizer_c::remove_stuffing_bytes_and_handle_sequence_headers(packet_cptr packet) {
mxdebug_if(m_debug_stuffing_removal, boost::format("Starting stuff removal, frame size %1%\n") % packet->data->get_size());
auto buf = packet->data->get_buffer();
auto size = packet->data->get_size();
size_t pos = 4;
size_t start_code_pos = 0;
size_t stuffing_start = 0;
auto marker = get_uint32_be(buf);
uint32_t chunk_type = 0;
bool seq_hdr_found = false;
auto mid_remover = [this, &stuffing_start, &pos, &size, &buf]() {
if (!stuffing_start || (stuffing_start >= (pos - 4)))
return;
auto num_stuffing_bytes = pos - 4 - stuffing_start;
m_num_removed_stuffing_bytes += num_stuffing_bytes;
::memmove(&buf[stuffing_start], &buf[pos - 4], size - pos + 4);
pos -= num_stuffing_bytes;
size -= num_stuffing_bytes;
mxdebug_if(m_debug_stuffing_removal, boost::format(" Stuffing in the middle: %1%\n") % num_stuffing_bytes);
};
memory_cptr new_seq_hdr;
auto seq_hdr_copier = [this, &chunk_type, &seq_hdr_found, &buf, &start_code_pos, &pos, &new_seq_hdr, &size](bool at_end) {
if ((MPEGVIDEO_SEQUENCE_HEADER_START_CODE != chunk_type) && (MPEGVIDEO_EXT_START_CODE != chunk_type))
return;
if (MPEGVIDEO_SEQUENCE_HEADER_START_CODE == chunk_type)
seq_hdr_found = true;
else if (!seq_hdr_found)
return;
auto bytes_to_copy = at_end ? pos - start_code_pos : pos - 4 - start_code_pos;
if (!new_seq_hdr)
new_seq_hdr = memory_c::clone(&buf[start_code_pos], bytes_to_copy);
else
new_seq_hdr->add(&buf[start_code_pos], bytes_to_copy);
if (!hack_engaged(ENGAGE_USE_CODEC_STATE_ONLY))
return;
memmove(&buf[start_code_pos], &buf[pos - 4], size - pos + 4);
pos -= bytes_to_copy;
size -= bytes_to_copy;
};
while (pos < size) {
if ((MPEGVIDEO_SLICE_START_CODE_LOWER <= marker) && (MPEGVIDEO_SLICE_START_CODE_UPPER >= marker)) {
mxdebug_if(m_debug_stuffing_removal, boost::format(" Slice start code at %1%\n") % (pos - 4));
mid_remover();
seq_hdr_copier(false);
chunk_type = MPEGVIDEO_SLICE_START_CODE_LOWER;
stuffing_start = 0;
start_code_pos = pos - 4;
} else if ((marker & 0xffffff00) == 0x00000100) {
mxdebug_if(m_debug_stuffing_removal, boost::format(" Non-slice start code at %1%\n") % (pos - 4));
mid_remover();
seq_hdr_copier(false);
chunk_type = marker;
stuffing_start = 0;
start_code_pos = pos - 4;
} else if ((MPEGVIDEO_SLICE_START_CODE_LOWER == chunk_type) && !stuffing_start && (marker == 0x00000000)) {
mxdebug_if(m_debug_stuffing_removal, boost::format(" Start at %1%\n") % (pos - 3));
stuffing_start = pos - 3;
}
marker <<= 8;
marker |= buf[pos];
++pos;
}
if ((marker & 0xffffff00) == 0x00000100) {
seq_hdr_copier(false);
mid_remover();
} else if (stuffing_start && (stuffing_start < size)) {
mxdebug_if(m_debug_stuffing_removal, boost::format(" Stuffing at the end: chunk_type 0x%|1$08x| stuffing_start %2% stuffing_size %3%\n") % chunk_type % stuffing_start % (stuffing_start ? size - stuffing_start : 0));
m_num_removed_stuffing_bytes += size - stuffing_start;
size = stuffing_start;
}
packet->data->set_size(size);
if (!new_seq_hdr)
return;
if (!m_hcodec_private) {
set_codec_private(new_seq_hdr);
rerender_track_headers();
}
if (!m_seq_hdr || (*new_seq_hdr != *m_seq_hdr)) {
m_seq_hdr = new_seq_hdr;
packet->codec_state = new_seq_hdr->clone();
}
}
