static gboolean
gst_mpegv_parse_process_config (GstMpegvParse * mpvparse, GstBuffer * buf,
guint size)
{
guint8 *data;
guint8 *data_with_prefix;
GstMapInfo map;
gint i, offset;
if (mpvparse->seq_offset < 4) {
/* This shouldn't happen, but just in case... */
GST_WARNING_OBJECT (mpvparse, "Sequence header start code missing.");
return FALSE;
}
gst_buffer_map (buf, &map, GST_MAP_READ);
data = map.data + mpvparse->seq_offset;
g_assert (size <= map.size);
/* pointer to sequence header data including the start code prefix -
used for codec private data */
data_with_prefix = data - 4;
/* only do stuff if something new; only compare first 11 bytes, changes in
quantiser matrix doesn't matter here. Also changing the matrices in
codec_data seems to cause problem with decoders */
if (mpvparse->config && size == gst_buffer_get_size (mpvparse->config) &&
gst_buffer_memcmp (mpvparse->config, 0, data_with_prefix, MIN (size,
11)) == 0) {
gst_buffer_unmap (buf, &map);
return TRUE;
}
if (!gst_mpeg_video_parse_sequence_header (&mpvparse->sequencehdr, data,
size - mpvparse->seq_offset, 0)) {
GST_DEBUG_OBJECT (mpvparse,
"failed to parse config data (size %d) at offset %d",
size, mpvparse->seq_offset);
gst_buffer_unmap (buf, &map);
return FALSE;
}
GST_LOG_OBJECT (mpvparse, "accepting parsed config size %d", size);
/* Set mpeg version, and parse sequence extension */
mpvparse->config_flags = FLAG_NONE;
for (i = 0; i < mpvparse->ext_count; ++i) {
offset = mpvparse->ext_offsets[i];
mpvparse->config_flags |= FLAG_MPEG2;
if (offset < size) {
if (gst_mpeg_video_parse_sequence_extension (&mpvparse->sequenceext,
map.data, size, offset)) {
GST_LOG_OBJECT (mpvparse, "Read Sequence Extension");
mpvparse->config_flags |= FLAG_SEQUENCE_EXT;
} else
if (gst_mpeg_video_parse_sequence_display_extension
(&mpvparse->sequencedispext, map.data, size, offset)) {
GST_LOG_OBJECT (mpvparse, "Read Sequence Display Extension");
mpvparse->config_flags |= FLAG_SEQUENCE_DISPLAY_EXT;
}
}
}
if (mpvparse->config_flags & FLAG_MPEG2) {
/* Update the sequence header based on extensions */
GstMpegVideoSequenceExt *seqext = NULL;
GstMpegVideoSequenceDisplayExt *seqdispext = NULL;
if (mpvparse->config_flags & FLAG_SEQUENCE_EXT)
seqext = &mpvparse->sequenceext;
if (mpvparse->config_flags & FLAG_SEQUENCE_DISPLAY_EXT)
seqdispext = &mpvparse->sequencedispext;
gst_mpeg_video_finalise_mpeg2_sequence_header (&mpvparse->sequencehdr,
seqext, seqdispext);
}
if (mpvparse->fps_num == 0 || mpvparse->fps_den == 0) {
mpvparse->fps_num = mpvparse->sequencehdr.fps_n;
mpvparse->fps_den = mpvparse->sequencehdr.fps_d;
}
/* parsing ok, so accept it as new config */
if (mpvparse->config != NULL)
gst_buffer_unref (mpvparse->config);
mpvparse->config = gst_buffer_new_and_alloc (size);
gst_buffer_fill (mpvparse->config, 0, data_with_prefix, size);
/* trigger src caps update */
mpvparse->update_caps = TRUE;
gst_buffer_unmap (buf, &map);
return TRUE;
}
static gboolean
gst_mpegv_parse_process_config (GstMpegvParse * mpvparse, GstMapInfo * info,
guint size)
{
GstMpegVideoPacket packet;
guint8 *data_with_prefix;
gint i;
if (mpvparse->seq_offset < 4) {
/* This shouldn't happen, but just in case... */
GST_WARNING_OBJECT (mpvparse, "Sequence header start code missing.");
return FALSE;
}
packet.data = info->data;
packet.type = GST_MPEG_VIDEO_PACKET_SEQUENCE;
packet.offset = mpvparse->seq_offset;
packet.size = size - mpvparse->seq_offset;
/* pointer to sequence header data including the start code prefix -
used for codec private data */
data_with_prefix = (guint8 *) packet.data + packet.offset - 4;
/* only do stuff if something new; only compare first 8 bytes, changes in
quantiser matrix or bitrate don't matter here. Also changing the
matrices in codec_data seems to cause problem with decoders */
if (mpvparse->config &&
gst_buffer_memcmp (mpvparse->config, 0, data_with_prefix, MIN (size,
8)) == 0) {
return TRUE;
}
if (!gst_mpeg_video_packet_parse_sequence_header (&packet,
&mpvparse->sequencehdr)) {
GST_DEBUG_OBJECT (mpvparse,
"failed to parse config data (size %d) at offset %d",
size, mpvparse->seq_offset);
return FALSE;
}
mpvparse->seqhdr_updated = TRUE;
GST_LOG_OBJECT (mpvparse, "accepting parsed config size %d", size);
/* Set mpeg version, and parse sequence extension */
mpvparse->config_flags = FLAG_NONE;
for (i = 0; i < mpvparse->ext_count; ++i) {
packet.type = GST_MPEG_VIDEO_PACKET_EXTENSION;
packet.offset = mpvparse->ext_offsets[i];
packet.size = (gint) size - mpvparse->ext_offsets[i];
mpvparse->config_flags |= FLAG_MPEG2;
if (packet.size > 1) {
switch (packet.data[packet.offset] >> 4) {
case GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE:
if (gst_mpeg_video_packet_parse_sequence_extension (&packet,
&mpvparse->sequenceext)) {
GST_LOG_OBJECT (mpvparse, "Read Sequence Extension");
mpvparse->config_flags |= FLAG_SEQUENCE_EXT;
mpvparse->seqext_updated = TRUE;
}
break;
case GST_MPEG_VIDEO_PACKET_EXT_SEQUENCE_DISPLAY:
if (gst_mpeg_video_packet_parse_sequence_display_extension (&packet,
&mpvparse->sequencedispext)) {
GST_LOG_OBJECT (mpvparse, "Read Sequence Display Extension");
mpvparse->config_flags |= FLAG_SEQUENCE_DISPLAY_EXT;
mpvparse->seqdispext_updated = TRUE;
}
break;
case GST_MPEG_VIDEO_PACKET_EXT_QUANT_MATRIX:
if (gst_mpeg_video_packet_parse_quant_matrix_extension (&packet,
&mpvparse->quantmatrext)) {
GST_LOG_OBJECT (mpvparse, "Read Quantization Matrix Extension");
mpvparse->quantmatrext_updated = TRUE;
}
break;
}
}
}
if (mpvparse->config_flags & FLAG_MPEG2) {
/* Update the sequence header based on extensions */
GstMpegVideoSequenceExt *seqext = NULL;
GstMpegVideoSequenceDisplayExt *seqdispext = NULL;
if (mpvparse->config_flags & FLAG_SEQUENCE_EXT)
seqext = &mpvparse->sequenceext;
if (mpvparse->config_flags & FLAG_SEQUENCE_DISPLAY_EXT)
seqdispext = &mpvparse->sequencedispext;
gst_mpeg_video_finalise_mpeg2_sequence_header (&mpvparse->sequencehdr,
seqext, seqdispext);
}
if (mpvparse->fps_num == 0 || mpvparse->fps_den == 0) {
mpvparse->fps_num = mpvparse->sequencehdr.fps_n;
mpvparse->fps_den = mpvparse->sequencehdr.fps_d;
}
/* parsing ok, so accept it as new config */
if (mpvparse->config != NULL)
gst_buffer_unref (mpvparse->config);
mpvparse->config = gst_buffer_new_and_alloc (size);
gst_buffer_fill (mpvparse->config, 0, data_with_prefix, size);
/* trigger src caps update */
mpvparse->update_caps = TRUE;
return TRUE;
}
