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qtdemux: fix push based seeking

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... where it comes down to transforming incoming BYTE segment
to a corresponding TIME segment.

Also fixes #609405.
This commit is contained in:
Mark Nauwelaerts 2010-05-11 18:42:32 +02:00
parent 5fcbea7e7e
commit bcde9fab09
1 changed files with 10 additions and 19 deletions
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29
gst/qtdemux/qtdemux.c
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@ -1401,7 +1401,6 @@ gst_qtdemux_find_sample (GstQTDemux * qtdemux, gint64 byte_pos, gboolean fw,
gboolean set, QtDemuxStream ** _stream, gint * _index, gint64 * _time)
{
gint i, n, index;
guint32 ts_timescale = -1; /* the timescale corresponding to min_time */
gint64 time, min_time;
QtDemuxStream *stream;
@ -1414,7 +1413,6 @@ gst_qtdemux_find_sample (GstQTDemux * qtdemux, gint64 byte_pos, gboolean fw,
gint inc;
gboolean set_sample;
str = qtdemux->streams[n];
set_sample = !set;
@ -1438,10 +1436,10 @@ gst_qtdemux_find_sample (GstQTDemux * qtdemux, gint64 byte_pos, gboolean fw,
}
/* determine min/max time */
time = str->samples[i].timestamp + str->samples[i].pts_offset;
if (min_time == -1 || (!fw && min_time > time) ||
(fw && min_time < time)) {
time = gst_util_uint64_scale (time, GST_SECOND, str->timescale);
if (min_time == -1 || (!fw && time > min_time) ||
(fw && time < min_time)) {
min_time = time;
ts_timescale = str->timescale;
}
/* determine stream with leading sample, to get its position */
if (!stream || (fw
@ -1459,8 +1457,8 @@ gst_qtdemux_find_sample (GstQTDemux * qtdemux, gint64 byte_pos, gboolean fw,
gst_qtdemux_move_stream (qtdemux, str, str->n_samples);
}
if (_time && ts_timescale != -1)
*_time = gst_util_uint64_scale (min_time, GST_SECOND, ts_timescale);
if (_time)
*_time = min_time;
if (_stream)
*_stream = stream;
if (_index)
@ -1528,7 +1526,9 @@ gst_qtdemux_handle_sink_event (GstPad * sinkpad, GstEvent * event)
if (stop > 0) {
gst_qtdemux_find_sample (demux, stop, FALSE, FALSE, NULL, NULL,
&stop);
stop = MAX (stop, 0);
/* keyframe seeking should already arrange for start >= stop,
* but make sure in other rare cases */
stop = MAX (stop, start);
}
} else {
GST_DEBUG_OBJECT (demux, "unsupported segment format, ignoring");
@ -1543,17 +1543,6 @@ gst_qtdemux_handle_sink_event (GstPad * sinkpad, GstEvent * event)
"stop %" GST_TIME_FORMAT, update, rate, arate, GST_FORMAT_TIME,
GST_TIME_ARGS (start), GST_TIME_ARGS (stop));
/* FIXME: workaround/safety check for broken files (don't want to end
* up with NULL events if stop < start). Figure out real cause of this
* and fix it. */
if (stop < start) {
GST_ELEMENT_ERROR (demux, STREAM, DEMUX,
(_("This file is invalid and cannot be played.")),
("stop %" GST_TIME_FORMAT " < start %" GST_TIME_FORMAT,
GST_TIME_ARGS (stop), GST_TIME_ARGS (start)));
return FALSE;
}
gst_qtdemux_push_event (demux,
gst_event_new_new_segment_full (update, rate, arate, GST_FORMAT_TIME,
start, stop, start));
@ -1734,6 +1723,8 @@ gst_qtdemux_change_state (GstElement * element, GstStateChange transition)
qtdemux->n_audio_streams = 0;
qtdemux->n_sub_streams = 0;
gst_segment_init (&qtdemux->segment, GST_FORMAT_TIME);
qtdemux->requested_seek_time = GST_CLOCK_TIME_NONE;
qtdemux->seek_offset = 0;
break;
}
default: