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qtdemux: cleanups and make duration more accurate

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Make the QtDemuxSample struct smaller by keeping the duration and the pts_offset
as their 32 bit values.
Make some macros to calculate PTS, DTS and duration of a sample.
Deref the sample index less often by keeping a ref to the sample we're dealing
with.
This commit is contained in:
Wim Taymans 2010-01-04 16:33:30 +01:00
parent 22eb18f828
commit 91a5e5138f
1 changed files with 39 additions and 32 deletions
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71
gst/qtdemux/qtdemux.c
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@ -88,13 +88,28 @@ typedef struct _QtDemuxSample QtDemuxSample;
struct _QtDemuxSample
{
guint32 size;
gint32 pts_offset; /* Add this value to timestamp to get the pts */
guint64 offset;
guint64 pts_offset; /* Add this value to timestamp to get the pts */
guint64 timestamp; /* In mov time */
guint64 duration; /* In mov time */
guint64 timestamp; /* DTS In mov time */
guint32 duration; /* In mov time */
gboolean keyframe; /* TRUE when this packet is a keyframe */
};
/* timestamp is the DTS */
#define QTSAMPLE_DTS(stream,sample) gst_util_uint64_scale ((sample)->timestamp,\
GST_SECOND, (stream)->timescale)
/* timestamp + offset is the PTS */
#define QTSAMPLE_PTS(stream,sample) gst_util_uint64_scale ((sample)->timestamp + \
(sample)->pts_offset, GST_SECOND, (stream)->timescale)
/* timestamp + duration - dts is the duration */
#define QTSAMPLE_DUR_DTS(stream,sample,dts) (gst_util_uint64_scale ((sample)->timestamp + \
(sample)->duration, GST_SECOND, (stream)->timescale) - (dts));
/* timestamp + offset + duration - pts is the duration */
#define QTSAMPLE_DUR_PTS(stream,sample,pts) (gst_util_uint64_scale ((sample)->timestamp + \
(sample)->pts_offset + (sample)->duration, GST_SECOND, (stream)->timescale) - (pts));
#define QTSAMPLE_KEYFRAME(stream,sample) ((stream)->all_keyframe || (sample)->keyframe)
/*
* Quicktime has tracks and segments. A track is a continuous piece of
* multimedia content. The track is not always played from start to finish but
@ -2098,21 +2113,21 @@ gst_qtdemux_activate_segment (GstQTDemux * qtdemux, QtDemuxStream * stream,
if (kf_index > stream->sample_index) {
GST_DEBUG_OBJECT (qtdemux,
"moving forwards to keyframe at %u (pts %" GST_TIME_FORMAT, kf_index,
GST_TIME_ARGS (gst_util_uint64_scale (stream->samples[kf_index].
timestamp, GST_SECOND, stream->timescale)));
GST_TIME_ARGS (gst_util_uint64_scale (stream->
samples[kf_index].timestamp, GST_SECOND, stream->timescale)));
gst_qtdemux_move_stream (qtdemux, stream, kf_index);
} else {
GST_DEBUG_OBJECT (qtdemux,
"moving forwards, keyframe at %u (pts %" GST_TIME_FORMAT
" already sent", kf_index,
GST_TIME_ARGS (gst_util_uint64_scale (stream->samples[kf_index].
timestamp, GST_SECOND, stream->timescale)));
GST_TIME_ARGS (gst_util_uint64_scale (stream->
samples[kf_index].timestamp, GST_SECOND, stream->timescale)));
}
} else {
GST_DEBUG_OBJECT (qtdemux,
"moving backwards to keyframe at %u (pts %" GST_TIME_FORMAT, kf_index,
GST_TIME_ARGS (gst_util_uint64_scale (stream->samples[kf_index].
timestamp, GST_SECOND, stream->timescale)));
GST_TIME_ARGS (gst_util_uint64_scale (stream->
samples[kf_index].timestamp, GST_SECOND, stream->timescale)));
gst_qtdemux_move_stream (qtdemux, stream, kf_index);
}
@ -2170,14 +2185,11 @@ gst_qtdemux_prepare_current_sample (GstQTDemux * qtdemux,
return FALSE;
}
*timestamp =
gst_util_uint64_scale (sample->timestamp + sample->pts_offset,
GST_SECOND, stream->timescale);
*timestamp = QTSAMPLE_PTS (stream, sample);
*offset = sample->offset;
*size = sample->size;
*duration =
gst_util_uint64_scale (sample->duration, GST_SECOND, stream->timescale);
*keyframe = stream->all_keyframe || sample->keyframe;
*duration = QTSAMPLE_DUR_PTS (stream, sample, *timestamp);
*keyframe = QTSAMPLE_KEYFRAME (stream, sample);
/* update dummy segment duration */
if (stream->sample_index == stream->n_samples - 1 && stream->n_segments == 1) {
@ -3160,6 +3172,7 @@ gst_qtdemux_chain (GstPad * sinkpad, GstBuffer * inbuf)
case QTDEMUX_STATE_MOVIE:{
GstBuffer *outbuf;
QtDemuxStream *stream = NULL;
QtDemuxSample *sample;
int i = -1;
guint64 timestamp, duration, position;
gboolean keyframe;
@ -3210,21 +3223,15 @@ gst_qtdemux_chain (GstPad * sinkpad, GstBuffer * inbuf)
GST_FOURCC_ARGS (stream->fourcc));
g_return_val_if_fail (outbuf != NULL, GST_FLOW_ERROR);
position =
gst_util_uint64_scale (stream->samples[stream->
sample_index].timestamp, GST_SECOND, stream->timescale);
timestamp =
gst_util_uint64_scale (stream->samples[stream->
sample_index].timestamp +
stream->samples[stream->sample_index].pts_offset, GST_SECOND,
stream->timescale);
duration =
gst_util_uint64_scale (stream->samples[stream->
sample_index].duration, GST_SECOND, stream->timescale);
keyframe = stream->all_keyframe
|| stream->samples[stream->sample_index].keyframe;
ret =
gst_qtdemux_decorate_and_push_buffer (demux, stream, outbuf,
sample = &stream->samples[stream->sample_index];
position = QTSAMPLE_DTS (stream, sample);
timestamp = QTSAMPLE_PTS (stream, sample);
duration = QTSAMPLE_DUR_DTS (stream, sample, position);
keyframe = QTSAMPLE_KEYFRAME (stream, sample);
ret = gst_qtdemux_decorate_and_push_buffer (demux, stream, outbuf,
timestamp, duration, keyframe, position, demux->offset);
/* combine flows */
@ -4130,8 +4137,8 @@ qtdemux_stbl_init (GstQTDemux * qtdemux, QtDemuxStream * stream, GNode * stbl)
return FALSE;
}
GST_DEBUG_OBJECT (qtdemux, "allocating n_samples %u (%u MB)",
stream->n_samples,
GST_DEBUG_OBJECT (qtdemux, "allocating n_samples %u * %d = (%u MB)",
stream->n_samples, sizeof (QtDemuxSample),
(guint) (stream->n_samples * sizeof (QtDemuxSample)) >> 20);
if (stream->n_samples >=