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appsrc: optimise caps changing when previously-set caps have not taken effect yet

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Only negotiate/change caps once when setting caps twice and
the first-set caps have not been used yet.

Based on patch by Eunhae Choi.

https://bugzilla.gnome.org/show_bug.cgi?id=747517
This commit is contained in:
Tim-Philipp Müller 2015-05-18 11:23:16 +01:00
parent b1bc2af766
commit 8304893d06
2 changed files with 133 additions and 0 deletions
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3
gst-libs/gst/app/gstappsrc.c
View file

@ -1239,6 +1239,9 @@ gst_app_src_set_caps (GstAppSrc * appsrc, const GstCaps * caps)
GstCaps *new_caps;
new_caps = caps ? gst_caps_copy (caps) : NULL;
GST_DEBUG_OBJECT (appsrc, "setting caps to %" GST_PTR_FORMAT, caps);
if (priv->queue->tail != NULL && GST_IS_CAPS (priv->queue->tail->data)) {
gst_caps_unref (g_queue_pop_tail (priv->queue));
}
g_queue_push_tail (priv->queue, new_caps);
gst_caps_replace (&priv->last_caps, new_caps);
}

130
tests/check/elements/appsrc.c
View file

@ -205,6 +205,135 @@ GST_START_TEST (test_appsrc_block_deadlock)
GST_END_TEST;
typedef struct
{
GstCaps *caps1;
GstCaps *caps2;
GstCaps *expected_caps;
} Helper;
static void
caps_notify_cb (GObject * obj, GObject * child, GParamSpec * pspec, Helper * h)
{
GstCaps *caps = NULL;
g_object_get (child, "caps", &caps, NULL);
if (caps) {
GST_LOG_OBJECT (child, "expected caps: %" GST_PTR_FORMAT, h->expected_caps);
GST_LOG_OBJECT (child, "caps set to : %" GST_PTR_FORMAT, caps);
fail_unless (gst_caps_is_equal (caps, h->expected_caps));
gst_caps_unref (caps);
}
}
static void
handoff_cb (GstElement * sink, GstBuffer * buf, GstPad * pad, Helper * h)
{
/* have our buffer, now the caps should change */
h->expected_caps = h->caps2;
GST_INFO ("got buffer, expect caps %" GST_PTR_FORMAT " next", h->caps2);
}
/* Make sure that if set_caps() is called twice before the source is started,
* the caps are just replaced and not put into the internal queue */
GST_START_TEST (test_appsrc_set_caps_twice)
{
GstElement *pipe, *src, *sink;
GstMessage *msg;
GstCaps *caps;
Helper h;
h.caps1 = gst_caps_new_simple ("foo/bar", "bleh", G_TYPE_INT, 2, NULL);
h.caps2 = gst_caps_new_simple ("bar/foo", "xyz", G_TYPE_INT, 3, NULL);
pipe = gst_pipeline_new ("pipeline");
src = gst_element_factory_make ("appsrc", NULL);
sink = gst_element_factory_make ("fakesink", NULL);
gst_bin_add_many (GST_BIN (pipe), src, sink, NULL);
gst_element_link (src, sink);
g_signal_connect (pipe, "deep-notify::caps", G_CALLBACK (caps_notify_cb), &h);
g_object_set (sink, "signal-handoffs", TRUE, NULL);
g_signal_connect (sink, "handoff", G_CALLBACK (handoff_cb), &h);
/* case 1: set caps to caps1, then set again to caps2, all this before
* appsrc is started and before any buffers are in the queue yet. We don't
* want to see any trace of caps1 during negotiation in this case. */
gst_app_src_set_caps (GST_APP_SRC (src), h.caps1);
caps = gst_app_src_get_caps (GST_APP_SRC (src));
fail_unless (gst_caps_is_equal (caps, h.caps1));
gst_caps_unref (caps);
gst_app_src_set_caps (GST_APP_SRC (src), h.caps2);
caps = gst_app_src_get_caps (GST_APP_SRC (src));
fail_unless (gst_caps_is_equal (caps, h.caps2));
gst_caps_unref (caps);
gst_app_src_end_of_stream (GST_APP_SRC (src));
h.expected_caps = h.caps2;
gst_element_set_state (pipe, GST_STATE_PLAYING);
msg =
gst_bus_timed_pop_filtered (GST_ELEMENT_BUS (pipe), -1, GST_MESSAGE_EOS);
gst_message_unref (msg);
gst_element_set_state (pipe, GST_STATE_NULL);
gst_object_unref (pipe);
GST_INFO ("Case #2");
/* case 2: set caps to caps1, then push a buffer and set to caps2, again
* before appsrc is started. In this case appsrc should negotiate to caps1
* first, and then caps2 after pushing the first buffer. */
/* We're creating a new pipeline/appsrc here because appsrc's behaviour
* change slightly after setting it to NULL/READY and then re-using it */
pipe = gst_pipeline_new ("pipeline");
src = gst_element_factory_make ("appsrc", NULL);
sink = gst_element_factory_make ("fakesink", NULL);
gst_bin_add_many (GST_BIN (pipe), src, sink, NULL);
gst_element_link (src, sink);
g_signal_connect (pipe, "deep-notify::caps", G_CALLBACK (caps_notify_cb), &h);
g_object_set (sink, "signal-handoffs", TRUE, NULL);
g_signal_connect (sink, "handoff", G_CALLBACK (handoff_cb), &h);
gst_app_src_set_caps (GST_APP_SRC (src), h.caps1);
caps = gst_app_src_get_caps (GST_APP_SRC (src));
fail_unless (gst_caps_is_equal (caps, h.caps1));
gst_caps_unref (caps);
/* first caps1, then buffer, then later caps2 */
h.expected_caps = h.caps1;
gst_element_set_state (pipe, GST_STATE_PLAYING);
gst_app_src_push_buffer (GST_APP_SRC (src), gst_buffer_new ());
gst_app_src_set_caps (GST_APP_SRC (src), h.caps2);
caps = gst_app_src_get_caps (GST_APP_SRC (src));
fail_unless (gst_caps_is_equal (caps, h.caps2));
gst_caps_unref (caps);
gst_app_src_end_of_stream (GST_APP_SRC (src));
msg =
gst_bus_timed_pop_filtered (GST_ELEMENT_BUS (pipe), -1, GST_MESSAGE_EOS);
gst_message_unref (msg);
gst_element_set_state (pipe, GST_STATE_NULL);
gst_object_unref (pipe);
gst_caps_unref (h.caps2);
gst_caps_unref (h.caps1);
}
GST_END_TEST;
static Suite *
appsrc_suite (void)
{
@ -212,6 +341,7 @@ appsrc_suite (void)
TCase *tc_chain = tcase_create ("general");
tcase_add_test (tc_chain, test_appsrc_non_null_caps);
tcase_add_test (tc_chain, test_appsrc_set_caps_twice);
if (RUNNING_ON_VALGRIND)
tcase_add_loop_test (tc_chain, test_appsrc_block_deadlock, 0, 5);