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ext/theora/theoradec.c: Use higher precision timestamps calculation.

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Original commit message from CVS:
* ext/theora/theoradec.c: (_theora_granule_frame),
(_theora_granule_time), (_inc_granulepos),
(theora_dec_src_convert), (theora_dec_sink_convert),
(theora_handle_type_packet), (theora_handle_data_packet),
(theora_dec_chain):
Use higher precision timestamps calculation.
Convert some other conversions to _scale.
This commit is contained in:
Wim Taymans 2006-01-31 17:27:00 +00:00
parent b5398e7a9d
commit 344800fb30
2 changed files with 64 additions and 39 deletions
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10
ChangeLog
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@ -1,3 +1,13 @@
2006-01-31 Wim Taymans <wim@fluendo.com>
* ext/theora/theoradec.c: (_theora_granule_frame),
(_theora_granule_time), (_inc_granulepos),
(theora_dec_src_convert), (theora_dec_sink_convert),
(theora_handle_type_packet), (theora_handle_data_packet),
(theora_dec_chain):
Use higher precision timestamps calculation.
Convert some other conversions to _scale.
2006-01-31 Stefan Kost <ensonic@users.sf.net>
* gst/audiotestsrc/gstaudiotestsrc.c:

93
ext/theora/theoradec.c
View file

@ -56,6 +56,7 @@ struct _GstTheoraDec
gboolean have_header;
guint64 granulepos;
guint64 granule_shift;
GstClockTime last_timestamp;
guint64 frame_nr;
@ -208,25 +209,52 @@ _theora_ilog (unsigned int v)
return (ret);
}
static void
_inc_granulepos (GstTheoraDec * dec)
static gint64
_theora_granule_frame (GstTheoraDec * dec, gint64 granulepos)
{
guint ilog;
gint framecount;
if (dec->granulepos == -1)
return;
if (granulepos == -1)
return -1;
ilog = _theora_ilog (dec->info.keyframe_frequency_force - 1);
ilog = dec->granule_shift;
framecount = dec->granulepos >> ilog;
framecount += dec->granulepos - (framecount << ilog);
/* granulepos is last ilog bits for counting pframes since last iframe and
* bits in front of that for the framenumber of the last iframe. */
framecount = granulepos >> ilog;
framecount += granulepos - (framecount << ilog);
GST_DEBUG_OBJECT (dec, "framecount=%d, ilog=%u", framecount, ilog);
framecount++;
return framecount;
}
dec->granulepos = (framecount << ilog);
static GstClockTime
_theora_granule_time (GstTheoraDec * dec, gint64 granulepos)
{
gint framecount;
if (granulepos == -1)
return -1;
framecount = _theora_granule_frame (dec, dec->granulepos);
return gst_util_uint64_scale_int (framecount * GST_SECOND,
dec->info.fps_denominator, dec->info.fps_numerator);
}
static gint64
_inc_granulepos (GstTheoraDec * dec, gint64 granulepos)
{
gint framecount;
if (granulepos == -1)
return -1;
framecount = _theora_granule_frame (dec, granulepos);
return (framecount + 1) << dec->granule_shift;
}
#if 0
@ -298,8 +326,8 @@ theora_dec_src_convert (GstPad * pad,
case GST_FORMAT_BYTES:
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
*dest_value =
src_value * 2 / (dec->info.height * dec->info.width * 3);
*dest_value = gst_util_uint64_scale_int (src_value, 2,
dec->info.height * dec->info.width * 3);
break;
case GST_FORMAT_TIME:
/* seems like a rather silly conversion, implement me if you like */
@ -312,9 +340,8 @@ theora_dec_src_convert (GstPad * pad,
case GST_FORMAT_BYTES:
scale = 3 * (dec->info.width * dec->info.height) / 2;
case GST_FORMAT_DEFAULT:
*dest_value =
scale * (((guint64) src_value * dec->info.fps_numerator) /
(dec->info.fps_denominator * GST_SECOND));
*dest_value = scale * gst_util_uint64_scale_int (src_value,
dec->info.fps_numerator, dec->info.fps_denominator * GST_SECOND);
break;
default:
res = FALSE;
@ -323,8 +350,8 @@ theora_dec_src_convert (GstPad * pad,
case GST_FORMAT_DEFAULT:
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = src_value * (GST_SECOND * dec->info.fps_denominator /
dec->info.fps_numerator);
*dest_value = gst_util_uint64_scale_int (src_value,
GST_SECOND * dec->info.fps_denominator, dec->info.fps_numerator);
break;
case GST_FORMAT_BYTES:
*dest_value =
@ -363,20 +390,9 @@ theora_dec_sink_convert (GstPad * pad,
switch (src_format) {
case GST_FORMAT_DEFAULT:
{
guint64 framecount;
guint ilog;
ilog = _theora_ilog (dec->info.keyframe_frequency_force - 1);
/* granulepos is last ilog bits for counting pframes since last iframe and
* bits in front of that for the framenumber of the last iframe. */
framecount = src_value >> ilog;
framecount += src_value - (framecount << ilog);
switch (*dest_format) {
case GST_FORMAT_TIME:
*dest_value = framecount * (GST_SECOND * dec->info.fps_denominator /
dec->info.fps_numerator);
*dest_value = _theora_granule_time (dec, src_value);
break;
default:
res = FALSE;
@ -388,17 +404,16 @@ theora_dec_sink_convert (GstPad * pad,
switch (*dest_format) {
case GST_FORMAT_DEFAULT:
{
guint ilog = _theora_ilog (dec->info.keyframe_frequency_force - 1);
guint rest;
/* framecount */
*dest_value = src_value * dec->info.fps_numerator /
(GST_SECOND * dec->info.fps_denominator);
*dest_value = gst_util_uint64_scale_int (src_value,
dec->info.fps_numerator, GST_SECOND * dec->info.fps_denominator);
/* funny way of calculating granulepos in theora */
rest = *dest_value / dec->info.keyframe_frequency_force;
*dest_value -= rest;
*dest_value <<= ilog;
*dest_value <<= dec->granule_shift;
*dest_value += rest;
break;
}
@ -743,6 +758,8 @@ theora_handle_type_packet (GstTheoraDec * dec, ogg_packet * packet)
dec->offset_y = 0;
}
dec->granule_shift = _theora_ilog (dec->info.keyframe_frequency_force - 1);
GST_DEBUG_OBJECT (dec, "after fixup frame dimension %dx%d, offset %d:%d",
dec->width, dec->height, dec->offset_x, dec->offset_y);
@ -941,8 +958,8 @@ theora_handle_data_packet (GstTheoraDec * dec, ogg_packet * packet,
dec->frame_nr++;
GST_BUFFER_OFFSET_END (out) = dec->frame_nr;
GST_BUFFER_DURATION (out) =
GST_SECOND * ((gdouble) dec->info.fps_denominator) /
dec->info.fps_numerator;
gst_util_uint64_scale_int (GST_SECOND, dec->info.fps_denominator,
dec->info.fps_numerator);
GST_BUFFER_TIMESTAMP (out) = outtime;
result = theora_dec_push (dec, out);
@ -1005,11 +1022,9 @@ theora_dec_chain (GstPad * pad, GstBuffer * buf)
if (dec->have_header) {
if (packet.granulepos != -1) {
dec->granulepos = packet.granulepos;
dec->last_timestamp =
GST_SECOND * theora_granule_time (&dec->state, packet.granulepos);
dec->last_timestamp = _theora_granule_time (dec, packet.granulepos);
} else if (dec->last_timestamp != -1) {
dec->last_timestamp +=
(GST_SECOND * dec->info.fps_denominator) / dec->info.fps_numerator;
dec->last_timestamp = _theora_granule_time (dec, dec->granulepos);
}
} else {
dec->last_timestamp = -1;
@ -1030,7 +1045,7 @@ theora_dec_chain (GstPad * pad, GstBuffer * buf)
}
done:
_inc_granulepos (dec);
dec->granulepos = _inc_granulepos (dec, dec->granulepos);
gst_object_unref (dec);