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ext/theora/theoradec.c: Don't try to decode frames before we received a keyframe

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Original commit message from CVS:
* ext/theora/theoradec.c: (theora_dec_chain),
(theora_dec_change_state):
Don't try to decode frames before we received a keyframe
This commit is contained in:
Wim Taymans 2004-06-11 17:34:32 +00:00
parent 0bf06aa33b
commit 01c78dfc80
2 changed files with 22 additions and 1 deletions
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6
ChangeLog
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@ -1,3 +1,9 @@
2004-06-11 Wim Taymans <wim@fluendo.com>
* ext/theora/theoradec.c: (theora_dec_chain),
(theora_dec_change_state):
Don't try to decode frames before we received a keyframe.
2004-06-11 Wim Taymans <wim@fluendo.com>
* ext/ogg/gstoggmux.c: (gst_ogg_mux_class_init),

17
ext/theora/theoradec.c
View file

@ -54,6 +54,8 @@ struct _GstTheoraDec
guint packetno;
guint64 granulepos;
gboolean need_keyframe;
};
struct _GstTheoraDecClass
@ -334,6 +336,7 @@ theora_dec_chain (GstPad * pad, GstData * data)
packet.packetno = dec->packetno++;
packet.b_o_s = (packet.packetno == 0) ? 1 : 0;
packet.e_o_s = 0;
/* switch depending on packet type */
if (packet.packet[0] & 0x80) {
/* header packet */
@ -376,12 +379,23 @@ theora_dec_chain (GstPad * pad, GstData * data)
gst_caps_free (caps);
}
} else {
/* normal data packet */
yuv_buffer yuv;
GstBuffer *out;
guint8 *y, *v, *u;
guint i;
gboolean keyframe;
/* normal data packet */
/* the second most significant bit of the first data byte is cleared
* for keyframes */
keyframe = (packet.packet[0] & 0x40) == 0;
if (keyframe) {
dec->need_keyframe = FALSE;
} else if (dec->need_keyframe) {
/* drop frames if we're looking for a keyframe */
gst_data_unref (data);
return;
}
#if 0
{
GTimeVal tv;
@ -446,6 +460,7 @@ theora_dec_change_state (GstElement * element)
case GST_STATE_READY_TO_PAUSED:
theora_info_init (&dec->info);
theora_comment_init (&dec->comment);
dec->need_keyframe = TRUE;
break;
case GST_STATE_PAUSED_TO_PLAYING:
break;