rtp/gst/: Separated the G711 payloaders/depayloaders into separate elements for mulaw/alaw. Also removed the old g711...

Original commit message from CVS:
2006-02-23  Philippe Kalaf  <philippe.kalaf at collabora.co.uk>

* rtp/gst/gstrtppcmadepay.c:
* rtp/gst/gstrtppcmadepay.h:
* rtp/gst/gstgstrtppcmapay.c:
* rtp/gst/gstgstrtppcmapay.h:
* rtp/gst/gstrtppcmudepay.c:
* rtp/gst/gstrtppcmudepay.h:
* rtp/gst/gstrtppcmupay.c:
* rtp/gst/gstrtppcmupay.h:
* rtp/gst/Makefile.am:
* rtp/gst/gstrtp.c:
* rtp/gst/README:
Separated the G711 payloaders/depayloaders into separate elements for
mulaw/alaw. Also removed the old g711 payloaders/depayloaders.

1 files changed, 160 insertions, 0 deletions

diff --git a/gst/rtp/gstrtppcmadepay.c b/gst/rtp/gstrtppcmadepay.c
new file mode 100644
index 00000000..a381fe6b
--- /dev/null
+++ b/gst/rtp/gstrtppcmadepay.c
@@ -0,0 +1,160 @@
+/* GStreamer
+ * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
+ * Copyright (C) <2005> Edgard Lima <edgard.lima@indt.org.br>
+ * Copyright (C) <2005> Zeeshan Ali <zeenix@gmail.com>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <string.h>
+#include <gst/rtp/gstrtpbuffer.h>
+#include "gstrtppcmadepay.h"
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_pcmadepay_details = {
+  "RTP packet parser",
+  "Codec/Depayr/Network",
+  "Extracts PCMA audio from RTP packets",
+  "Edgard Lima <edgard.lima@indt.org.br>, Zeeshan Ali <zeenix@gmail.com>"
+};
+
+/* RtpPcmaDepay signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0
+};
+
+static GstStaticPadTemplate gst_rtp_pcma_depay_sink_template =
+GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"audio\", "
+        "clock-rate = (int) 8000, " "encoding-name = (string) \"PCMA\"")
+    );
+
+static GstStaticPadTemplate gst_rtp_pcma_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-alaw, " "channels = (int) 1")
+    );
+
+static GstBuffer *gst_rtp_pcma_depay_process (GstBaseRTPDepayload * depayload,
+    GstBuffer * buf);
+static gboolean gst_rtp_pcma_depay_setcaps (GstBaseRTPDepayload * depayload,
+    GstCaps * caps);
+
+GST_BOILERPLATE (GstRtpPcmaDepay, gst_rtp_pcma_depay, GstBaseRTPDepayload,
+    GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+static void
+gst_rtp_pcma_depay_base_init (gpointer klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_pcma_depay_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_pcma_depay_sink_template));
+  gst_element_class_set_details (element_class, &gst_rtp_pcmadepay_details);
+}
+
+static void
+gst_rtp_pcma_depay_class_init (GstRtpPcmaDepayClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+  gstbasertpdepayload_class->process = gst_rtp_pcma_depay_process;
+  gstbasertpdepayload_class->set_caps = gst_rtp_pcma_depay_setcaps;
+}
+
+static void
+gst_rtp_pcma_depay_init (GstRtpPcmaDepay * rtppcmadepay,
+    GstRtpPcmaDepayClass * klass)
+{
+  GstBaseRTPDepayload *depayload;
+
+  depayload = GST_BASE_RTP_DEPAYLOAD (rtppcmadepay);
+
+  depayload->clock_rate = 8000;
+  gst_pad_use_fixed_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload));
+}
+
+static gboolean
+gst_rtp_pcma_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
+{
+  GstCaps *srccaps;
+  gboolean ret;
+
+  srccaps = gst_caps_new_simple ("audio/x-alaw",
+      "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+
+  ret = gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), srccaps);
+  gst_caps_unref (srccaps);
+
+  return ret;
+}
+
+static GstBuffer *
+gst_rtp_pcma_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
+{
+  GstCaps *srccaps;
+  GstBuffer *outbuf = NULL;
+  gint payload_len;
+  guint8 *payload;
+
+  GST_DEBUG ("process : got %d bytes, mark %d ts %u seqn %d",
+      GST_BUFFER_SIZE (buf),
+      gst_rtp_buffer_get_marker (buf),
+      gst_rtp_buffer_get_timestamp (buf), gst_rtp_buffer_get_seq (buf));
+
+  srccaps = GST_PAD_CAPS (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload));
+  if (!srccaps) {
+    /* Set the default caps */
+    srccaps = gst_caps_new_simple ("audio/x-mulaw",
+        "channels", G_TYPE_INT, 1, "rate", G_TYPE_INT, 8000, NULL);
+    gst_pad_set_caps (GST_BASE_RTP_DEPAYLOAD_SRCPAD (depayload), srccaps);
+    gst_caps_unref (srccaps);
+  }
+
+  payload_len = gst_rtp_buffer_get_payload_len (buf);
+  payload = gst_rtp_buffer_get_payload (buf);
+
+  outbuf = gst_buffer_new_and_alloc (payload_len);
+  memcpy (GST_BUFFER_DATA (outbuf), payload, payload_len);
+  return outbuf;
+}
+
+gboolean
+gst_rtp_pcma_depay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtppcmadepay",
+      GST_RANK_NONE, GST_TYPE_RTP_PCMA_DEPAY);
+}