gst/rtp/: Small cleanups.

Original commit message from CVS:
* gst/rtp/gstrtpL16depay.c: (gst_rtp_L16depay_change_state):
* gst/rtp/gstrtpmp4gdepay.c: (gst_rtp_mp4g_depay_class_init):
Small cleanups.
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpvorbisdepay.c: (gst_rtp_vorbis_depay_base_init),
(gst_rtp_vorbis_depay_class_init), (gst_rtp_vorbis_depay_init),
(gst_rtp_vorbis_depay_finalize), (gst_rtp_vorbis_depay_setcaps),
(gst_rtp_vorbis_depay_process),
(gst_rtp_vorbis_depay_set_property),
(gst_rtp_vorbis_depay_get_property),
(gst_rtp_vorbis_depay_change_state),
(gst_rtp_vorbis_depay_plugin_init):
* gst/rtp/gstrtpvorbisdepay.h:
* gst/rtp/gstrtpvorbispay.c: (gst_rtp_vorbis_pay_base_init),
(gst_rtp_vorbis_pay_class_init), (gst_rtp_vorbis_pay_init),
(gst_rtp_vorbis_pay_setcaps), (gst_rtp_vorbis_pay_init_packet),
(gst_rtp_vorbis_pay_flush_packet),
(gst_rtp_vorbis_pay_append_buffer),
(gst_rtp_vorbis_pay_handle_buffer),
(gst_rtp_vorbis_pay_plugin_init):
* gst/rtp/gstrtpvorbispay.h:
Add experimental vorbis pay and depayloaders.

1 files changed, 440 insertions, 0 deletions

diff --git a/gst/rtp/gstrtpvorbisdepay.c b/gst/rtp/gstrtpvorbisdepay.c
new file mode 100644
index 00000000..cf3c0823
--- /dev/null
+++ b/gst/rtp/gstrtpvorbisdepay.c
@@ -0,0 +1,440 @@
+/* GStreamer
+ * Copyright (C) <2006> Wim Taymans <wim@fluendo.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 details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include <string.h>
+#include "gstrtpvorbisdepay.h"
+
+GST_DEBUG_CATEGORY_STATIC (rtpvorbisdepay_debug);
+#define GST_CAT_DEFAULT (rtpvorbisdepay_debug)
+
+/* elementfactory information */
+static const GstElementDetails gst_rtp_vorbis_depay_details =
+GST_ELEMENT_DETAILS ("RTP packet parser",
+    "Codec/Depay/Network",
+    "Extracts Vorbis Audio from RTP packets (draft-01 of RFC XXXX)",
+    "Wim Taymans <wim@fluendo.com>");
+
+/* RtpVorbisDepay signals and args */
+enum
+{
+  /* FILL ME */
+  LAST_SIGNAL
+};
+
+enum
+{
+  ARG_0,
+};
+
+static GstStaticPadTemplate gst_rtp_vorbis_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) [1, MAX ], " "encoding-name = (string) \"vorbis\""
+        /* All required parameters 
+         *
+         * "encoding-params = (string) <num channels>"
+         * "delivery-method = (string) { inline, in_band, out_band/<specific_name> } " 
+         * "configuration = (string) ANY" 
+         */
+        /* All optional parameters
+         *
+         * "configuration-uri =" 
+         */
+    )
+    );
+
+static GstStaticPadTemplate gst_rtp_vorbis_depay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-vorbis")
+    );
+
+GST_BOILERPLATE (GstRtpVorbisDepay, gst_rtp_vorbis_depay, GstBaseRTPDepayload,
+    GST_TYPE_BASE_RTP_DEPAYLOAD);
+
+static gboolean gst_rtp_vorbis_depay_setcaps (GstBaseRTPDepayload * depayload,
+    GstCaps * caps);
+static GstBuffer *gst_rtp_vorbis_depay_process (GstBaseRTPDepayload * depayload,
+    GstBuffer * buf);
+
+static void gst_rtp_vorbis_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtp_vorbis_depay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+static void gst_rtp_vorbis_depay_finalize (GObject * object);
+
+static GstStateChangeReturn gst_rtp_vorbis_depay_change_state (GstElement *
+    element, GstStateChange transition);
+
+
+static void
+gst_rtp_vorbis_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_vorbis_depay_sink_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_vorbis_depay_src_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_vorbis_depay_details);
+}
+
+static void
+gst_rtp_vorbis_depay_class_init (GstRtpVorbisDepayClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
+
+  gobject_class->set_property = gst_rtp_vorbis_depay_set_property;
+  gobject_class->get_property = gst_rtp_vorbis_depay_get_property;
+  gobject_class->finalize = gst_rtp_vorbis_depay_finalize;
+
+  gstelement_class->change_state = gst_rtp_vorbis_depay_change_state;
+
+  gstbasertpdepayload_class->process = gst_rtp_vorbis_depay_process;
+  gstbasertpdepayload_class->set_caps = gst_rtp_vorbis_depay_setcaps;
+
+  GST_DEBUG_CATEGORY_INIT (rtpvorbisdepay_debug, "rtpvorbisdepay", 0,
+      "Vorbis RTP Depayloader");
+}
+
+static void
+gst_rtp_vorbis_depay_init (GstRtpVorbisDepay * rtpvorbisdepay,
+    GstRtpVorbisDepayClass * klass)
+{
+  rtpvorbisdepay->adapter = gst_adapter_new ();
+}
+static void
+gst_rtp_vorbis_depay_finalize (GObject * object)
+{
+  GstRtpVorbisDepay *rtpvorbisdepay = GST_RTP_VORBIS_DEPAY (object);
+
+  g_object_unref (rtpvorbisdepay->adapter);
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+static gboolean
+gst_rtp_vorbis_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
+{
+  GstStructure *structure;
+  GstRtpVorbisDepay *rtpvorbisdepay;
+  GstCaps *srccaps;
+  gint clock_rate;
+
+  rtpvorbisdepay = GST_RTP_VORBIS_DEPAY (depayload);
+
+  structure = gst_caps_get_structure (caps, 0);
+
+  if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
+    goto no_rate;
+
+  /* caps seem good, configure element */
+  depayload->clock_rate = clock_rate;
+
+  /* set caps on pad and on header */
+  srccaps = gst_caps_new_simple ("audio/x-vorbis", NULL);
+  gst_pad_set_caps (depayload->srcpad, srccaps);
+  gst_caps_unref (srccaps);
+
+  return TRUE;
+
+no_rate:
+  {
+    GST_ERROR_OBJECT (rtpvorbisdepay, "no clock-rate specified");
+    return FALSE;
+  }
+}
+
+static GstBuffer *
+gst_rtp_vorbis_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
+{
+  GstRtpVorbisDepay *rtpvorbisdepay;
+  GstBuffer *outbuf;
+  GstFlowReturn ret;
+  gint payload_len;
+  guint8 *payload, *to_free = NULL;
+  guint32 timestamp;
+  guint32 header, ident;
+  guint8 F, VDT, packets;
+  gboolean free_payload;
+
+  rtpvorbisdepay = GST_RTP_VORBIS_DEPAY (depayload);
+
+  if (!gst_rtp_buffer_validate (buf))
+    goto bad_packet;
+
+  payload_len = gst_rtp_buffer_get_payload_len (buf);
+
+  GST_DEBUG_OBJECT (depayload, "got RTP packet of size %d", payload_len);
+
+  /* we need at least 4 bytes for the packet header */
+  if (payload_len < 4)
+    goto packet_short;
+
+  payload = gst_rtp_buffer_get_payload (buf);
+  free_payload = FALSE;
+
+  header = GST_READ_UINT32_BE (payload);
+  /*
+   *  0                   1                   2                   3
+   *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |                     Ident                     | F |VDT|# pkts.|
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   *
+   * F: Fragment type (0=none, 1=start, 2=cont, 3=end)
+   * VDT: Vorbis data type (0=vorbis, 1=config, 2=comment, 3=reserved)
+   * pkts: number of packets.
+   */
+  VDT = (header & 0x30) >> 4;
+  if (VDT == 3)
+    goto ignore_reserved;
+
+  ident = (header >> 8) & 0xffffff;
+  F = (header & 0xc0) >> 6;
+  packets = (header & 0xf);
+
+  if (VDT == 0) {
+    /* FIXME, if we have a raw payload, we need the codebook for the ident */
+  }
+
+  /* skip header */
+  payload += 4;
+  payload_len -= 4;
+
+  GST_DEBUG_OBJECT (depayload, "ident: %u, F: %d, packets: %d", ident, F,
+      packets);
+
+  /* fragmented packets, assemble */
+  if (F != 0) {
+    GstBuffer *vdata;
+    guint headerskip;
+
+    if (F == 1) {
+      /* if we start a packet, clear adapter and start assembling. */
+      gst_adapter_clear (rtpvorbisdepay->adapter);
+      GST_DEBUG_OBJECT (depayload, "start assemble");
+      rtpvorbisdepay->assembling = TRUE;
+    }
+
+    if (!rtpvorbisdepay->assembling)
+      goto no_output;
+
+    /* first assembled packet, reuse 2 bytes to store the length */
+    headerskip = (F == 1 ? 4 : 6);
+    /* skip header and length. */
+    vdata = gst_rtp_buffer_get_payload_subbuffer (buf, headerskip, -1);
+
+    GST_DEBUG_OBJECT (depayload, "assemble vorbis packet");
+    gst_adapter_push (rtpvorbisdepay->adapter, vdata);
+
+    /* packet is not complete, we are done */
+    if (F != 3)
+      goto no_output;
+
+    /* construct assembled buffer */
+    payload_len = gst_adapter_available (rtpvorbisdepay->adapter);
+    payload = gst_adapter_take (rtpvorbisdepay->adapter, payload_len);
+    payload[0] = ((payload_len - 2) >> 8) & 0xff;
+    payload[1] = (payload_len - 2) & 0xff;
+    to_free = payload;
+  }
+
+  GST_DEBUG_OBJECT (depayload, "assemble done");
+
+  /* we not assembling anymore now */
+  rtpvorbisdepay->assembling = FALSE;
+  gst_adapter_clear (rtpvorbisdepay->adapter);
+
+  /* payload now points to a length with that many vorbis data bytes.
+   * Iterate over the packets and send them out.
+   *
+   *  0                   1                   2                   3
+   *  0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |             length            |          vorbis data         ..
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * ..                        vorbis data                           |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * |            length             |   next vorbis packet data    ..
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+   * ..                        vorbis data                           |
+   * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+*
+   */
+  timestamp = gst_rtp_buffer_get_timestamp (buf);
+
+  while (payload_len > 2) {
+    guint16 length;
+
+    length = GST_READ_UINT16_BE (payload);
+    payload += 2;
+    payload_len -= 2;
+
+    GST_DEBUG_OBJECT (depayload, "read length %u, avail: %d", length,
+        payload_len);
+
+    /* skip packet if something odd happens */
+    if (length > payload_len)
+      goto length_short;
+
+    /* create buffer for packet */
+    if (to_free) {
+      outbuf = gst_buffer_new ();
+      GST_BUFFER_DATA (outbuf) = payload;
+      GST_BUFFER_MALLOCDATA (outbuf) = to_free;
+      GST_BUFFER_SIZE (outbuf) = length;
+      to_free = NULL;
+    } else {
+      outbuf = gst_buffer_new_and_alloc (length);
+      memcpy (GST_BUFFER_DATA (outbuf), payload, length);
+    }
+
+    payload += length;
+    payload_len -= length;
+
+    if (timestamp != -1)
+      /* push with timestamp of the last packet, which is the same timestamp that
+       * should apply to the first assembled packet. */
+      ret = gst_base_rtp_depayload_push_ts (depayload, timestamp, outbuf);
+    else
+      ret = gst_base_rtp_depayload_push (depayload, outbuf);
+
+    if (ret != GST_FLOW_OK)
+      break;
+
+    /* make sure we don't set a timestamp on next buffers */
+    timestamp = -1;
+  }
+
+  g_free (to_free);
+
+  return NULL;
+
+no_output:
+  {
+    return NULL;
+  }
+  /* ERORRS */
+bad_packet:
+  {
+    GST_ELEMENT_WARNING (rtpvorbisdepay, STREAM, DECODE,
+        ("Packet did not validate"), (NULL));
+    return NULL;
+  }
+packet_short:
+  {
+    GST_ELEMENT_WARNING (rtpvorbisdepay, STREAM, DECODE,
+        ("Packet was too short (%d < 4)", payload_len), (NULL));
+    return NULL;
+  }
+ignore_reserved:
+  {
+    GST_WARNING_OBJECT (rtpvorbisdepay, "reserved VDT ignored");
+    return NULL;
+  }
+length_short:
+  {
+    GST_ELEMENT_WARNING (rtpvorbisdepay, STREAM, DECODE,
+        ("Packet contains invalid data"), (NULL));
+    return NULL;
+  }
+}
+
+static void
+gst_rtp_vorbis_depay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpVorbisDepay *rtpvorbisdepay;
+
+  rtpvorbisdepay = GST_RTP_VORBIS_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_rtp_vorbis_depay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstRtpVorbisDepay *rtpvorbisdepay;
+
+  rtpvorbisdepay = GST_RTP_VORBIS_DEPAY (object);
+
+  switch (prop_id) {
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static GstStateChangeReturn
+gst_rtp_vorbis_depay_change_state (GstElement * element,
+    GstStateChange transition)
+{
+  GstRtpVorbisDepay *rtpvorbisdepay;
+  GstStateChangeReturn ret;
+
+  rtpvorbisdepay = GST_RTP_VORBIS_DEPAY (element);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_NULL_TO_READY:
+      break;
+    case GST_STATE_CHANGE_READY_TO_PAUSED:
+      break;
+    default:
+      break;
+  }
+
+  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
+
+  switch (transition) {
+    case GST_STATE_CHANGE_READY_TO_NULL:
+      break;
+    default:
+      break;
+  }
+  return ret;
+}
+
+gboolean
+gst_rtp_vorbis_depay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpvorbisdepay",
+      GST_RANK_NONE, GST_TYPE_RTP_VORBIS_DEPAY);
+}