gst/rtp/README: Say something about case-sensitivity of caps vs mime-attributes.

Original commit message from CVS:
* gst/rtp/README:
Say something about case-sensitivity of caps vs mime-attributes.

* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpamrpay.c: (gst_rtp_amr_pay_class_init),
(gst_rtp_amr_pay_handle_buffer):
* gst/rtp/gstrtpmp4gpay.c: (gst_rtp_mp4g_pay_get_type),
(gst_rtp_mp4g_pay_base_init), (gst_rtp_mp4g_pay_class_init),
(gst_rtp_mp4g_pay_init), (gst_rtp_mp4g_pay_finalize),
(gst_rtp_mp4g_pay_new_caps), (gst_rtp_mp4g_pay_setcaps),
(gst_rtp_mp4g_pay_flush), (gst_rtp_mp4g_pay_handle_buffer),
(gst_rtp_mp4g_pay_set_property), (gst_rtp_mp4g_pay_get_property),
(gst_rtp_mp4g_pay_plugin_init):
* gst/rtp/gstrtpmp4gpay.h:
Added beginnings of mpeg4-generic payloader (RFC 3640)

1 files changed, 374 insertions, 0 deletions

diff --git a/gst/rtp/gstrtpmp4gpay.c b/gst/rtp/gstrtpmp4gpay.c
new file mode 100644
index 00000000..db6ea9f8
--- /dev/null
+++ b/gst/rtp/gstrtpmp4gpay.c
@@ -0,0 +1,374 @@
+/* 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 
+ */
+
+#ifdef HAVE_CONFIG_H
+#  include "config.h"
+#endif
+
+#include <string.h>
+
+#include <gst/rtp/gstrtpbuffer.h>
+
+#include "gstrtpmp4gpay.h"
+
+GST_DEBUG_CATEGORY (rtpmp4gpay_debug);
+#define GST_CAT_DEFAULT (rtpmp4gpay_debug)
+
+/* elementfactory information */
+static GstElementDetails gst_rtp_mp4gpay_details = {
+  "RTP packet parser",
+  "Codec/Payloader/Network",
+  "Payload MPEG4 elementary streams as RTP packets (RFC 3640)",
+  "Wim Taymans <wim@fluendo.com>"
+};
+
+static GstStaticPadTemplate gst_rtp_mp4g_pay_sink_template =
+    GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/mpeg,"
+        "mpegversion=(int) 4,"
+        "systemstream=(boolean)false;" "audio/mpeg," "mpegversion=(int) 4")
+    );
+
+static GstStaticPadTemplate gst_rtp_mp4g_pay_src_template =
+GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("application/x-rtp, "
+        "media = (string) \"video\", "
+        "payload = (int) [ 96, 127 ], "
+        "clock-rate = (int) [1, MAX ], "
+        "encoding-name = (string) \"MP4G-ES\", "
+        /* required string params */
+        "streamtype = (string) { \"4\", \"5\" }, "      /* 4 = video, 5 = audio */
+        "profile-level-id = (int) [1,MAX], "
+        /* "config = (string) [1,MAX]" */
+        "mode = (string) { \"generic\", \"CELP-cbr\", \"CELP-vbr\", \"AAC-lbr\", \"AAC-hbr\" }, "
+        /* Optional general parameters */
+        "objecttype = (int) [1,MAX], " "constantsize = (int) [1,MAX], " /* constant size of each AU */
+        "constantduration = (int) [1,MAX], "    /* constant duration of each AU */
+        "maxdisplacement = (int) [1,MAX], "
+        "de-interleavebuffersize: = (int) [1,MAX], "
+        /* Optional configuration parameters */
+        "sizelength = (int) [1, 16], "  /* max 16 bits, should be enough... */
+        "indexlength = (int) [1, 8], "
+        "indexdeltalength = (int) [1, 8], "
+        "ctsdeltalength = (int) [1, 64], "
+        "dtsdeltalength = (int) [1, 64], "
+        "randomaccessindication = (int) {0, 1}, "
+        "streamstateindication = (int) [0, 64], "
+        "auxiliarydatasizelength = (int) [0, 64]")
+    );
+
+enum
+{
+  PROP_0,
+};
+
+
+static void gst_rtp_mp4g_pay_class_init (GstRtpMP4GPayClass * klass);
+static void gst_rtp_mp4g_pay_base_init (GstRtpMP4GPayClass * klass);
+static void gst_rtp_mp4g_pay_init (GstRtpMP4GPay * rtpmp4gpay);
+static void gst_rtp_mp4g_pay_finalize (GObject * object);
+
+static void gst_rtp_mp4g_pay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_rtp_mp4g_pay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static gboolean gst_rtp_mp4g_pay_setcaps (GstBaseRTPPayload * payload,
+    GstCaps * caps);
+static GstFlowReturn gst_rtp_mp4g_pay_handle_buffer (GstBaseRTPPayload *
+    payload, GstBuffer * buffer);
+
+static GstBaseRTPPayloadClass *parent_class = NULL;
+
+static GType
+gst_rtp_mp4g_pay_get_type (void)
+{
+  static GType rtpmp4gpay_type = 0;
+
+  if (!rtpmp4gpay_type) {
+    static const GTypeInfo rtpmp4gpay_info = {
+      sizeof (GstRtpMP4GPayClass),
+      (GBaseInitFunc) gst_rtp_mp4g_pay_base_init,
+      NULL,
+      (GClassInitFunc) gst_rtp_mp4g_pay_class_init,
+      NULL,
+      NULL,
+      sizeof (GstRtpMP4GPay),
+      0,
+      (GInstanceInitFunc) gst_rtp_mp4g_pay_init,
+    };
+
+    rtpmp4gpay_type =
+        g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpMP4GPay",
+        &rtpmp4gpay_info, 0);
+  }
+  return rtpmp4gpay_type;
+}
+
+static void
+gst_rtp_mp4g_pay_base_init (GstRtpMP4GPayClass * klass)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_mp4g_pay_src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&gst_rtp_mp4g_pay_sink_template));
+
+  gst_element_class_set_details (element_class, &gst_rtp_mp4gpay_details);
+}
+
+static void
+gst_rtp_mp4g_pay_class_init (GstRtpMP4GPayClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+  GstBaseRTPPayloadClass *gstbasertppayload_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
+
+  parent_class = g_type_class_ref (GST_TYPE_BASE_RTP_PAYLOAD);
+
+  gobject_class->set_property = gst_rtp_mp4g_pay_set_property;
+  gobject_class->get_property = gst_rtp_mp4g_pay_get_property;
+
+  gobject_class->finalize = gst_rtp_mp4g_pay_finalize;
+
+  gstbasertppayload_class->set_caps = gst_rtp_mp4g_pay_setcaps;
+  gstbasertppayload_class->handle_buffer = gst_rtp_mp4g_pay_handle_buffer;
+
+  GST_DEBUG_CATEGORY_INIT (rtpmp4gpay_debug, "rtpmp4gpay", 0,
+      "MP4-generic RTP Payloader");
+
+}
+
+static void
+gst_rtp_mp4g_pay_init (GstRtpMP4GPay * rtpmp4gpay)
+{
+  rtpmp4gpay->adapter = gst_adapter_new ();
+  rtpmp4gpay->rate = 90000;
+  rtpmp4gpay->profile = 1;
+}
+
+static void
+gst_rtp_mp4g_pay_finalize (GObject * object)
+{
+  GstRtpMP4GPay *rtpmp4gpay;
+
+  rtpmp4gpay = GST_RTP_MP4G_PAY (object);
+
+  g_object_unref (rtpmp4gpay->adapter);
+  rtpmp4gpay->adapter = NULL;
+
+  G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
+#if 0
+static void
+gst_rtp_mp4g_pay_new_caps (GstRtpMP4GPay * rtpmp4gpay)
+{
+  gchar *profile, *config;
+  GValue v = { 0 };
+
+  profile = g_strdup_printf ("%d", rtpmp4gpay->profile);
+  g_value_init (&v, GST_TYPE_BUFFER);
+  gst_value_set_buffer (&v, rtpmp4gpay->config);
+  config = gst_value_serialize (&v);
+
+  gst_basertppayload_set_outcaps (GST_BASE_RTP_PAYLOAD (rtpmp4gpay),
+      "profile-level-id", G_TYPE_STRING, profile,
+      "config", G_TYPE_STRING, config, NULL);
+
+  g_value_unset (&v);
+
+  g_free (profile);
+  g_free (config);
+}
+#endif
+
+static gboolean
+gst_rtp_mp4g_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
+{
+  GstRtpMP4GPay *rtpmp4gpay;
+
+  rtpmp4gpay = GST_RTP_MP4G_PAY (payload);
+
+  gst_basertppayload_set_options (payload, "video", TRUE, "mpeg4-generic",
+      rtpmp4gpay->rate);
+
+  return TRUE;
+}
+
+static GstFlowReturn
+gst_rtp_mp4g_pay_flush (GstRtpMP4GPay * rtpmp4gpay)
+{
+  guint avail, total;
+  GstBuffer *outbuf;
+  GstFlowReturn ret;
+  gboolean fragmented;
+  guint mtu;
+
+  fragmented = FALSE;
+
+  /* the data available in the adapter is either smaller
+   * than the MTU or bigger. In the case it is smaller, the complete
+   * adapter contents can be put in one packet. In the case the
+   * adapter has more than one MTU, we need to fragment the MPEG data
+   * over multiple packets. */
+  total = avail = gst_adapter_available (rtpmp4gpay->adapter);
+
+  ret = GST_FLOW_OK;
+  mtu = GST_BASE_RTP_PAYLOAD_MTU (rtpmp4gpay);
+
+  while (avail > 0) {
+    guint towrite;
+    guint8 *payload;
+    guint8 *data;
+    guint payload_len;
+    guint packet_len;
+
+    /* this will be the total lenght of the packet */
+    packet_len = gst_rtp_buffer_calc_packet_len (avail, 0, 0);
+
+    /* fill one MTU or all available bytes, we need 4 spare bytes for
+     * the AU header. */
+    towrite = MIN (packet_len, mtu - 4);
+
+    /* this is the payload length */
+    payload_len = gst_rtp_buffer_calc_payload_len (towrite, 0, 0);
+
+    GST_DEBUG_OBJECT (rtpmp4gpay,
+        "avail %d, towrite %d, packet_len %d, payload_len %d", avail, towrite,
+        packet_len, payload_len);
+
+    /* create buffer to hold the payload, also make room for the 4 header bytes. */
+    outbuf = gst_rtp_buffer_new_allocate (payload_len + 4, 0, 0);
+
+    /* copy payload */
+    payload = gst_rtp_buffer_get_payload (outbuf);
+
+    /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+
+     * |AU-headers-length|AU-header|AU-header|      |AU-header|padding|
+     * |                 |   (1)   |   (2)   |      |   (n)   | bits  |
+     * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+
+     */
+    /* AU-headers-length, we only have 1 AU-header */
+    payload[0] = 0x00;
+    payload[1] = 0x10;          /* we use 16 bits for the header */
+
+    /* +---------------------------------------+
+     * |     AU-size                           |
+     * +---------------------------------------+
+     * |     AU-Index / AU-Index-delta         |
+     * +---------------------------------------+
+     * |     CTS-flag                          |
+     * +---------------------------------------+
+     * |     CTS-delta                         |
+     * +---------------------------------------+
+     * |     DTS-flag                          |
+     * +---------------------------------------+
+     * |     DTS-delta                         |
+     * +---------------------------------------+
+     * |     RAP-flag                          |
+     * +---------------------------------------+
+     * |     Stream-state                      |
+     * +---------------------------------------+
+     */
+    /* The AU-header, no CTS, DTS, RAP, Stream-state 
+     *
+     * AU-size is always the total size of the AU, not the fragmented size 
+     */
+    payload[2] = (total & 0x1fe0) >> 5;
+    payload[3] = (total & 0x1f) << 3;   /* we use 13 bits for the size, 3 bits index */
+
+    data = (guint8 *) gst_adapter_peek (rtpmp4gpay->adapter, payload_len);
+    memcpy (&payload[4], data, payload_len);
+
+    gst_adapter_flush (rtpmp4gpay->adapter, payload_len);
+
+    gst_rtp_buffer_set_marker (outbuf, avail > payload_len);
+
+    GST_BUFFER_TIMESTAMP (outbuf) = rtpmp4gpay->first_ts;
+
+    ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtpmp4gpay), outbuf);
+
+    avail -= payload_len;
+    fragmented = TRUE;
+  }
+
+  return ret;
+}
+
+/* we expect buffers as exactly one complete AU
+ */
+static GstFlowReturn
+gst_rtp_mp4g_pay_handle_buffer (GstBaseRTPPayload * basepayload,
+    GstBuffer * buffer)
+{
+  GstRtpMP4GPay *rtpmp4gpay;
+  GstFlowReturn ret;
+
+  ret = GST_FLOW_OK;
+
+  rtpmp4gpay = GST_RTP_MP4G_PAY (basepayload);
+
+  rtpmp4gpay->first_ts = GST_BUFFER_TIMESTAMP (buffer);
+
+  /* we always encode and flush a full AU */
+  gst_adapter_push (rtpmp4gpay->adapter, buffer);
+  ret = gst_rtp_mp4g_pay_flush (rtpmp4gpay);
+
+  return ret;
+}
+
+static void
+gst_rtp_mp4g_pay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  GstRtpMP4GPay *rtpmp4gpay;
+
+  rtpmp4gpay = GST_RTP_MP4G_PAY (object);
+
+  switch (prop_id) {
+    default:
+      break;
+  }
+}
+
+static void
+gst_rtp_mp4g_pay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  GstRtpMP4GPay *rtpmp4gpay;
+
+  rtpmp4gpay = GST_RTP_MP4G_PAY (object);
+
+  switch (prop_id) {
+    default:
+      break;
+  }
+}
+
+gboolean
+gst_rtp_mp4g_pay_plugin_init (GstPlugin * plugin)
+{
+  return gst_element_register (plugin, "rtpmp4gpay",
+      GST_RANK_NONE, GST_TYPE_RTP_MP4G_PAY);
+}