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qtdemux: remove math operation from loop

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The elst_offset doesn't change inside the loop, so compute it
outside
This commit is contained in:
Thiago Santos 2013-11-13 17:11:08 -03:00
parent 1a4e7338d9
commit cfdadd4114
1 changed files with 9 additions and 8 deletions
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17
gst/isomp4/qtdemux.c
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@ -2421,7 +2421,7 @@ qtdemux_parse_trun (GstQTDemux * qtdemux, GstByteReader * trun,
guint32 d_sample_flags, gint64 moof_offset, gint64 moof_length,
gint64 * base_offset, gint64 * running_offset)
{
guint64 timestamp;
guint64 timestamp, elst_timestamp;
gint32 data_offset = 0;
guint32 flags = 0, first_flags = 0, samples_count = 0;
gint i;
@ -2555,6 +2555,8 @@ qtdemux_parse_trun (GstQTDemux * qtdemux, GstByteReader * trun,
}
}
sample = stream->samples + stream->n_samples;
elst_timestamp = gst_util_uint64_scale (stream->elst_offset,
stream->timescale, GST_SECOND);
for (i = 0; i < samples_count; i++) {
guint32 dur, size, sflags, ct;
@ -2591,9 +2593,7 @@ qtdemux_parse_trun (GstQTDemux * qtdemux, GstByteReader * trun,
sample->offset = *running_offset;
sample->pts_offset = ct;
sample->size = size;
sample->timestamp =
timestamp + gst_util_uint64_scale (stream->elst_offset,
stream->timescale, GST_SECOND);
sample->timestamp = timestamp + elst_timestamp;
sample->duration = dur;
/* sample-is-difference-sample */
/* ismv seems to use 0x40 for keyframe, 0xc0 for non-keyframe,
@ -6354,7 +6354,11 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream, guint32 n)
last_chunk = stream->last_chunk;
if (stream->chunks_are_samples) {
guint64 elst_timestamp;
cur = &samples[stream->stsc_chunk_index];
elst_timestamp = gst_util_uint64_scale (stream->elst_offset,
stream->timescale, GST_SECOND);
for (j = stream->stsc_chunk_index; j < last_chunk; j++) {
if (j > n) {
@ -6383,10 +6387,7 @@ qtdemux_parse_samples (GstQTDemux * qtdemux, QtDemuxStream * stream, guint32 n)
j, GST_TIME_ARGS (gst_util_uint64_scale (stream->stco_sample_index,
GST_SECOND, stream->timescale)), cur->size);
cur->timestamp =
stream->stco_sample_index +
gst_util_uint64_scale (stream->elst_offset, stream->timescale,
GST_SECOND);
cur->timestamp = stream->stco_sample_index + elst_timestamp;
cur->duration = stream->samples_per_chunk;
cur->keyframe = TRUE;
cur++;