From ad83c4a0d55e0820e3504b9d2bbb7503ff61db1c Mon Sep 17 00:00:00 2001
From: David Schleef <ds@schleef.org>
Date: Tue, 9 Mar 2004 21:29:56 +0000
Subject: [PATCH] ext/alsa/gstalsa.c: Add fixate function.  (bug #135719)

Original commit message from CVS:
* ext/alsa/gstalsa.c: (gst_alsa_request_new_pad),
(gst_alsa_fixate): Add fixate function.  (bug #135719)
* ext/alsa/gstalsa.h:
* ext/alsa/gstalsasink.c: (gst_alsa_sink_init):
---
 ChangeLog              |  7 +++++++
 ext/alsa/gstalsa.c     | 28 ++++++++++++++++++++++++++++
 ext/alsa/gstalsa.h     |  2 ++
 ext/alsa/gstalsasink.c |  1 +
 4 files changed, 38 insertions(+)

diff --git a/ChangeLog b/ChangeLog
index 147d7b0093..dd12ad84a0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2004-03-09  David Schleef  <ds@schleef.org>
+
+	* ext/alsa/gstalsa.c: (gst_alsa_request_new_pad),
+	(gst_alsa_fixate): Add fixate function.  (bug #135719)
+	* ext/alsa/gstalsa.h:
+	* ext/alsa/gstalsasink.c: (gst_alsa_sink_init):
+
 2004-03-09  Benjamin Otte  <otte@gnome.org>
 
 	* ext/mikmod/gstmikmod.c: (gst_mikmod_init), (gst_mikmod_loop),
diff --git a/ext/alsa/gstalsa.c b/ext/alsa/gstalsa.c
index bf99c37513..6f4facb901 100644
--- a/ext/alsa/gstalsa.c
+++ b/ext/alsa/gstalsa.c
@@ -332,6 +332,7 @@ found_track:
 
   gst_pad_set_link_function (this->pad[track], gst_alsa_link);
   gst_pad_set_getcaps_function (this->pad[track], gst_alsa_get_caps);
+  gst_pad_set_fixate_function (this->pad[track], gst_alsa_fixate);
 
   gst_element_add_pad (GST_ELEMENT (this), this->pad[track]);
 
@@ -612,6 +613,33 @@ gst_alsa_get_caps (GstPad *pad)
   }
 }
 
+GstCaps *
+gst_alsa_fixate (GstPad *pad, const GstCaps *caps)
+{
+  GstCaps *newcaps;
+  GstStructure *structure;
+
+  newcaps = gst_caps_new_full (gst_structure_copy(gst_caps_get_structure (caps, 0)), NULL);
+  structure = gst_caps_get_structure (newcaps, 0);
+
+  if (gst_caps_structure_fixate_field_nearest_int (structure, "rate", 44100)) {
+    return newcaps;
+  }
+  if (gst_caps_structure_fixate_field_nearest_int (structure, "depth", 16)) {
+    return newcaps;
+  }
+  if (gst_caps_structure_fixate_field_nearest_int (structure, "width", 16)) {
+    return newcaps;
+  }
+  if (gst_caps_structure_fixate_field_nearest_int (structure, "channels", 2)) {
+    return newcaps;
+  }
+
+  gst_caps_free (newcaps);
+
+  return NULL;
+}
+
 /* Negotiates the caps */
 GstPadLinkReturn
 gst_alsa_link (GstPad *pad, const GstCaps *caps)
diff --git a/ext/alsa/gstalsa.h b/ext/alsa/gstalsa.h
index d610732d09..496c40179c 100644
--- a/ext/alsa/gstalsa.h
+++ b/ext/alsa/gstalsa.h
@@ -175,6 +175,8 @@ void			gst_alsa_set_eos	(GstAlsa *		this);
 GstPadLinkReturn	gst_alsa_link		(GstPad *		pad,
 						 const GstCaps *	caps);
 GstCaps *		gst_alsa_get_caps	(GstPad *		pad);
+GstCaps *		gst_alsa_fixate 	(GstPad *		pad,
+                                                 const GstCaps *        caps);
 GstCaps *		gst_alsa_caps		(snd_pcm_format_t	format,
 						 gint			rate,
 						 gint			channels);
diff --git a/ext/alsa/gstalsasink.c b/ext/alsa/gstalsasink.c
index d45416715f..254c70863f 100644
--- a/ext/alsa/gstalsasink.c
+++ b/ext/alsa/gstalsasink.c
@@ -145,6 +145,7 @@ gst_alsa_sink_init (GstAlsaSink *sink)
   this->pad[0] = gst_pad_new_from_template (gst_alsa_sink_pad_factory (), "sink");
   gst_pad_set_link_function (this->pad[0], gst_alsa_link);
   gst_pad_set_getcaps_function (this->pad[0], gst_alsa_get_caps);
+  gst_pad_set_fixate_function (this->pad[0], gst_alsa_fixate);
   gst_element_add_pad (GST_ELEMENT (this), this->pad[0]);
   
   this->clock = gst_alsa_clock_new ("alsasinkclock", gst_alsa_sink_get_time, this);