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test-onvif-client: perform accurate seeks

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See https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/merge_requests/336

Also, modify how we compute the position: position queries in
PAUSED mode fail to account for the newly-prerolled frame, leading
to frame skips when performing seeks in that state. Instead,
compute the current position from the last sample.
This commit is contained in:
Mathieu Duponchelle 2019-08-29 21:37:24 +02:00
parent 16bc937ed9
commit 513c0fcb95
1 changed files with 27 additions and 3 deletions
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30
examples/test-onvif-client.c
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@ -156,6 +156,27 @@ done:
return ret; return ret;
} }
static GstClockTime
get_current_position (Context * ctx, gboolean reverse)
{
GstSample *sample;
GstBuffer *buffer;
GstClockTime ret;
g_object_get (ctx->sink, "last-sample", &sample, NULL);
buffer = gst_sample_get_buffer (sample);
ret = GST_BUFFER_PTS (buffer);
if (reverse && GST_CLOCK_TIME_IS_VALID (GST_BUFFER_DURATION (buffer)))
ret += GST_BUFFER_DURATION (buffer);
gst_sample_unref (sample);
return ret;
}
static GstEvent * static GstEvent *
translate_seek_parameters (Context * ctx, SeekParameters * seek_params) translate_seek_parameters (Context * ctx, SeekParameters * seek_params)
{ {
@ -188,19 +209,22 @@ translate_seek_parameters (Context * ctx, SeekParameters * seek_params)
stop_type = GST_SEEK_TYPE_SET; stop_type = GST_SEEK_TYPE_SET;
if (!ctx->new_range) { if (!ctx->new_range) {
GstClockTime current_position =
get_current_position (ctx, seek_params->reverse);
gst_element_query_position (ctx->pipe, GST_FORMAT_TIME, &cur_pos); gst_element_query_position (ctx->pipe, GST_FORMAT_TIME, &cur_pos);
if (seek_params->reverse) { if (seek_params->reverse) {
stop_type = GST_SEEK_TYPE_SET; stop_type = GST_SEEK_TYPE_SET;
stop = cur_pos; stop = current_position;
} else { } else {
start_type = GST_SEEK_TYPE_SET; start_type = GST_SEEK_TYPE_SET;
start = cur_pos; start = current_position;
} }
} }
ctx->new_range = FALSE; ctx->new_range = FALSE;
flags = GST_SEEK_FLAG_FLUSH; flags = GST_SEEK_FLAG_FLUSH | GST_SEEK_FLAG_ACCURATE;
split = g_strsplit (seek_params->frames, "/", 2); split = g_strsplit (seek_params->frames, "/", 2);