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v4l2sink: fix pool-less allocation query handling

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This fixes a critical warning if the last-sample property is enabled:

  (gst-launch-1.0:391): GStreamer-CRITICAL **: 01:12:57.428: gst_object_unref: assertion 'object != NULL' failed

If the allocation query does not contain any allocation pools,
gst_query_parse_nth_allocation_pool will leave the local pool,
min, and max variables undefined, so check the array length first.
If pool is NULL, do not call gst_object_unref.
This commit is contained in:
Philipp Zabel 2019-03-07 11:24:38 +01:00 committed by Philipp Zabel
parent 3f9170bd02
commit 8b068fb78b
1 changed files with 3 additions and 2 deletions
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5
sys/v4l2/gstv4l2sink.c
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@ -556,7 +556,7 @@ gst_v4l2sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
g_object_get (bsink, "enable-last-sample", &last_sample_enabled, NULL);
if (last_sample_enabled) {
if (last_sample_enabled && gst_query_get_n_allocation_pools (query) > 0) {
GstBufferPool *pool;
guint size, min, max;
@ -568,7 +568,8 @@ gst_v4l2sink_propose_allocation (GstBaseSink * bsink, GstQuery * query)
max = min;
gst_query_set_nth_allocation_pool (query, 0, pool, size, min, max);
gst_object_unref (pool);
if (pool)
gst_object_unref (pool);
}
return TRUE;