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mpegvideoparse: add support for progressive frames

Browse source 
https://bugzilla.gnome.org/show_bug.cgi?id=663782
This commit is contained in:
Matej Knopp 2011-11-10 19:42:40 -03:00 committed by Thibault Saunier
parent 609ae9b812
commit a08b3bfa23
2 changed files with 54 additions and 7 deletions
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55
gst/videoparsers/gstmpegvideoparse.c
View file

@ -183,6 +183,7 @@ gst_mpegv_parse_reset_frame (GstMpegvParse * mpvparse)
mpvparse->last_sc = -1;
mpvparse->seq_offset = G_MAXUINT;
mpvparse->pic_offset = -1;
mpvparse->frame_repeat_count = 0;
}
static void
@ -238,8 +239,13 @@ gst_mpegv_parse_process_config (GstMpegvParse * mpvparse, GstBuffer * buf,
memcmp (GST_BUFFER_DATA (mpvparse->config), data, size) == 0)
return TRUE;
if (!gst_mpeg_video_parse_sequence_header (&mpvparse->sequencehdr, data,
if (gst_mpeg_video_parse_sequence_header (&mpvparse->sequencehdr, data,
GST_BUFFER_SIZE (buf) - mpvparse->seq_offset, 0)) {
if (mpvparse->fps_num == 0 || mpvparse->fps_den == 0) {
mpvparse->fps_num = mpvparse->sequencehdr.fps_n;
mpvparse->fps_den = mpvparse->sequencehdr.fps_d;
}
} else {
GST_DEBUG_OBJECT (mpvparse,
"failed to parse config data (size %d) at offset %d",
size, mpvparse->seq_offset);
@ -258,8 +264,17 @@ gst_mpegv_parse_process_config (GstMpegvParse * mpvparse, GstBuffer * buf,
if (tpoffsz->type == GST_MPEG_VIDEO_PACKET_EXTENSION) {
mpvparse->mpeg_version = 2;
gst_mpeg_video_parse_sequence_extension (&mpvparse->sequenceext,
GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf), tpoffsz->offset);
if (gst_mpeg_video_parse_sequence_extension (&mpvparse->sequenceext,
GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf),
tpoffsz->offset)) {
mpvparse->fps_num =
mpvparse->sequencehdr.fps_n * (mpvparse->sequenceext.fps_n_ext +
1) * 2;
mpvparse->fps_den =
mpvparse->sequencehdr.fps_d * (mpvparse->sequenceext.fps_d_ext +
1);
}
}
}
}
@ -335,6 +350,27 @@ picture_type_name (guint8 pct)
}
#endif /* GST_DISABLE_GST_DEBUG */
static void
parse_picture_extension (GstMpegvParse * mpvparse, GstBuffer * buf, guint off)
{
GstMpegVideoPictureExt ext;
if (gst_mpeg_video_parse_picture_extension (&ext, GST_BUFFER_DATA (buf),
GST_BUFFER_SIZE (buf), off)) {
mpvparse->frame_repeat_count = 1;
if (ext.repeat_first_field) {
if (mpvparse->sequenceext.progressive) {
if (ext.top_field_first)
mpvparse->frame_repeat_count = 5;
else
mpvparse->frame_repeat_count = 3;
} else if (ext.progressive_frame) {
mpvparse->frame_repeat_count = 2;
}
}
}
}
/* caller guarantees at least start code in @buf at @off */
/* for off == 0 initial code; returns TRUE if code starts a frame,
* otherwise returns TRUE if code terminates preceding frame */
@ -374,6 +410,10 @@ gst_mpegv_parse_process_sc (GstMpegvParse * mpvparse,
else
ret = TRUE;
break;
case GST_MPEG_VIDEO_PACKET_EXTENSION:
GST_LOG_OBJECT (mpvparse, "startcode is VIDEO PACKET EXTENSION");
parse_picture_extension (mpvparse, buf, off);
packet = FALSE;
default:
packet = FALSE;
break;
@ -551,9 +591,9 @@ gst_mpegv_parse_update_src_caps (GstMpegvParse * mpvparse)
}
/* perhaps we have a framerate */
if (mpvparse->sequencehdr.fps_n > 0 && mpvparse->sequencehdr.fps_d > 0) {
gint fps_num = mpvparse->sequencehdr.fps_n;
gint fps_den = mpvparse->sequencehdr.fps_d;
if (mpvparse->fps_num > 0 && mpvparse->fps_den > 0) {
gint fps_num = mpvparse->fps_num;
gint fps_den = mpvparse->fps_den;
GstClockTime latency = gst_util_uint64_scale (GST_SECOND, fps_den, fps_num);
gst_caps_set_simple (caps, "framerate",
@ -658,6 +698,9 @@ gst_mpegv_parse_parse_frame (GstBaseParse * parse, GstBaseParseFrame * frame)
GST_BUFFER_DURATION (buffer) = 0;
}
GST_BUFFER_DURATION (buffer) =
(1 + mpvparse->frame_repeat_count) * GST_BUFFER_DURATION (buffer);
if (G_UNLIKELY (mpvparse->drop && !mpvparse->config)) {
GST_DEBUG_OBJECT (mpvparse, "dropping frame as no config yet");
return GST_BASE_PARSE_FLOW_DROPPED;

6
gst/videoparsers/gstmpegvideoparse.h
View file

@ -21,7 +21,7 @@
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_MPEGVIDEO_PARSE_H__
#define __GST_MPEGVIDEO_PARSE_H__
@ -68,6 +68,10 @@ struct _GstMpegvParse {
/* properties */
gboolean drop;
gboolean gop_split;
int fps_num;
int fps_den;
int frame_repeat_count;
};
struct _GstMpegvParseClass {