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[MOVED FROM GST-P-FARSIGHT] Take rate from the peers caps if possible

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20080613235723-3e2dc-15690ee42708c539e1be12e20e076a5613faea96.gz
This commit is contained in:
Olivier Crete 2008-06-13 23:57:23 +00:00 committed by Edward Hervey
parent d881f34e0e
commit f0da427c61
1 changed files with 80 additions and 1 deletions
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81
gst/dtmf/gstdtmfsrc.c
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@ -251,6 +251,7 @@ static void gst_dtmf_src_add_stop_event (GstDTMFSrc *dtmfsrc);
static gboolean gst_dtmf_src_unlock (GstBaseSrc *src);
static gboolean gst_dtmf_src_unlock_stop (GstBaseSrc *src);
static gboolean gst_dtmf_src_negotiate (GstBaseSrc * basesrc);
static void
gst_dtmf_src_base_init (gpointer g_class)
@ -300,7 +301,8 @@ gst_dtmf_src_class_init (GstDTMFSrcClass * klass)
GST_DEBUG_FUNCPTR (gst_dtmf_src_handle_event);
gstbasesrc_class->create =
GST_DEBUG_FUNCPTR (gst_dtmf_src_create);
gstbasesrc_class->negotiate =
GST_DEBUG_FUNCPTR (gst_dtmf_src_negotiate);
}
@ -809,6 +811,83 @@ gst_dtmf_src_unlock_stop (GstBaseSrc *src) {
}
static gboolean
gst_dtmf_src_negotiate (GstBaseSrc * basesrc)
{
GstCaps *srccaps, *peercaps;
GstDTMFSrc *dtmfsrc = GST_DTMF_SRC (basesrc);
gboolean ret = FALSE;
srccaps = gst_caps_new_simple ("audio/x-raw-int",
"width", G_TYPE_INT, 16,
"depth", G_TYPE_INT, 16,
"endianness", G_TYPE_INT, G_BYTE_ORDER,
"signed", G_TYPE_BOOLEAN, TRUE,
"channels", G_TYPE_INT, 1,
NULL);
peercaps = gst_pad_peer_get_caps (GST_BASE_SRC_PAD (basesrc));
if (peercaps == NULL) {
/* no peer caps, just add the other properties */
gst_caps_set_simple (srccaps,
"rate", G_TYPE_INT, dtmfsrc->sample_rate,
NULL);
} else {
GstStructure *s;
gint sample_rate;
GstCaps *temp = NULL;
g_debug ("HAS PEERCAPS %s", gst_caps_to_string (peercaps));
/* peer provides caps we can use to fixate, intersect. This always returns a
* writable caps. */
temp = gst_caps_intersect (srccaps, peercaps);
gst_caps_unref (srccaps);
gst_caps_unref (peercaps);
if (!temp) {
GST_DEBUG_OBJECT (dtmfsrc, "Could not get intersection with peer caps");
return FALSE;
}
if (gst_caps_is_empty (temp)) {
GST_DEBUG_OBJECT (dtmfsrc, "Intersection with peer caps is empty");
gst_caps_unref (temp);
return FALSE;
}
/* now fixate, start by taking the first caps */
gst_caps_truncate (temp);
srccaps = temp;
/* get first structure */
s = gst_caps_get_structure (srccaps, 0);
if (gst_structure_get_int (s, "rate", &sample_rate))
{
dtmfsrc->sample_rate = sample_rate;
GST_LOG_OBJECT (dtmfsrc, "using rate from caps %d",
dtmfsrc->sample_rate);
} else {
GST_LOG_OBJECT (dtmfsrc, "using existing rate %d",
dtmfsrc->sample_rate);
}
gst_structure_set (s, "rate", G_TYPE_INT, dtmfsrc->sample_rate,
NULL);
}
ret = gst_pad_set_caps (GST_BASE_SRC_PAD (basesrc), srccaps);
g_warning ("negotiated %s", gst_caps_to_string (srccaps));
gst_caps_unref (srccaps);
return ret;
}
static GstStateChangeReturn
gst_dtmf_src_change_state (GstElement * element, GstStateChange transition)
{