gstreamer/testsuite/caps/renegotiate.c

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#include <gst/gst.h>
#include <string.h>
static GstPad *sinesrcpad;
static GstStaticCaps caps1 = GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness=(int)1234, "
"signed=(boolean)true, "
"width=(int)16, " "depth=(int)16, " "rate=(int)48000, " "channels=(int)1");
static GstStaticCaps caps2 = GST_STATIC_CAPS ("audio/x-raw-int, "
"endianness=(int)1234, "
"signed=(boolean)true, "
"width=(int)16, " "depth=(int)16, " "rate=(int)44100, " "channels=(int)1");
int stage = 0;
static GstCaps *
my_fixate (GstPad * pad, GstCaps * caps, gpointer user_data)
{
const char *element_name;
const char *pad_name;
element_name = gst_element_get_name (gst_pad_get_parent (pad));
pad_name = gst_pad_get_name (pad);
g_print ("%s:%s: %s\n", element_name, pad_name, gst_caps_to_string (caps));
if (strcmp (element_name, "sinesrc0") == 0 && strcmp (pad_name, "src") == 0) {
GstCaps *icaps;
const GstCaps *mycaps;
int rate;
sinesrcpad = pad;
if (stage == 0) {
mycaps = gst_static_caps_get (&caps1);
rate = 48000;
} else {
mycaps = gst_static_caps_get (&caps2);
rate = 44100;
}
icaps = gst_caps_intersect (caps, mycaps);
if (!gst_caps_is_empty (icaps)) {
gst_caps_free (icaps);
g_print ("returning %d\n", rate);
return gst_caps_copy (mycaps);
}
gst_caps_free (icaps);
}
return NULL;
}
int
main (int argc, char *argv[])
{
GstElement *pipeline;
const GList *list;
const GList *l2;
int i;
int ret;
gst_init (&argc, &argv);
/* change sinesrk to sinesrc once gst_parse_launch is fixed */
pipeline = gst_parse_launch ("sinesrk ! audioconvert ! "
"audio/x-raw-int, channels=2, rate=48000;"
"audio/x-raw-int, channels=1, rate=44100 !" "fakesink", NULL);
if (pipeline == NULL) {
g_print
("oops, couldn't build pipeline. You probably don't have audioconvert or sinesrc\n");
exit (0);
}
list = gst_bin_get_list (GST_BIN (pipeline));
while (list) {
GstElement *element = GST_ELEMENT (list->data);
l2 = gst_element_get_pad_list (element);
while (l2) {
GstPad *pad = GST_PAD (l2->data);
if (gst_pad_get_direction (pad) == GST_PAD_SRC) {
g_signal_connect (G_OBJECT (pad), "fixate", G_CALLBACK (my_fixate),
NULL);
}
l2 = g_list_next (l2);
}
list = g_list_next (list);
}
g_signal_connect (pipeline, "deep_notify",
G_CALLBACK (gst_element_default_deep_notify), NULL);
gst_element_set_state (pipeline, GST_STATE_PLAYING);
i = 0;
while (1) {
gst_bin_iterate (GST_BIN (pipeline));
i++;
if (i == 10) {
stage = 1;
g_print ("10 iterations\n");
ret = gst_pad_renegotiate (sinesrcpad);
g_print ("negotiation returned %d\n", ret);
}
if (i == 20) {
g_print ("20 iterations\n");
exit (0);
}
}
return 0;
}