gstrtpL16depay.c 9.25 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14
/* GStreamer
 * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
 *
 * 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 
 */

15 16 17
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
18 19 20 21 22 23 24
#include <string.h>
#include "gstrtpL16parse.h"
#include "gstrtp-common.h"

/* elementfactory information */
static GstElementDetails gst_rtp_L16parse_details = {
  "RTP packet parser",
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
25
  "Codec/Network",
26
  "Extracts raw audio from RTP packets",
Ronald S. Bultje's avatar
Ronald S. Bultje committed
27
  "Zeeshan Ali <zak147@yahoo.com>"
28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49
};

/* RtpL16Parse signals and args */
enum
{
  /* FILL ME */
  LAST_SIGNAL
};

enum
{
  ARG_0,
  ARG_FREQUENCY,
  ARG_PAYLOAD_TYPE,
};

GST_PAD_TEMPLATE_FACTORY (src_factory,
 	"src",
	GST_PAD_SRC,
	GST_PAD_ALWAYS,
	GST_CAPS_NEW (
		 "audio_raw",
50
		 "audio/x-raw-int",
51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69
		 "endianness",  GST_PROPS_INT (G_BYTE_ORDER), 
		 "signed", 	GST_PROPS_BOOLEAN (TRUE), 
		 "width", 	GST_PROPS_INT (16), 
		 "depth",	GST_PROPS_INT (16), 
		 "rate",	GST_PROPS_INT_RANGE (1000, 48000),
		 "channels", 	GST_PROPS_INT_RANGE (1, 2))
)
 
GST_PAD_TEMPLATE_FACTORY (sink_factory,
	"sink",
	GST_PAD_SINK,
	GST_PAD_ALWAYS,
	GST_CAPS_NEW (
		"rtp",
		"application/x-rtp",
		NULL)
);

static void gst_rtpL16parse_class_init (GstRtpL16ParseClass * klass);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
70
static void gst_rtpL16parse_base_init (GstRtpL16ParseClass * klass);
71 72
static void gst_rtpL16parse_init (GstRtpL16Parse * rtpL16parse);

73
static void gst_rtpL16parse_chain (GstPad * pad, GstData *_data);
74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89

static void gst_rtpL16parse_set_property (GObject * object, guint prop_id,
				   const GValue * value, GParamSpec * pspec);
static void gst_rtpL16parse_get_property (GObject * object, guint prop_id,
				   GValue * value, GParamSpec * pspec);
static GstElementStateReturn gst_rtpL16parse_change_state (GstElement * element);

static GstElementClass *parent_class = NULL;

static GType gst_rtpL16parse_get_type (void)
{
  static GType rtpL16parse_type = 0;

  if (!rtpL16parse_type) {
    static const GTypeInfo rtpL16parse_info = {
      sizeof (GstRtpL16ParseClass),
Ronald S. Bultje's avatar
Ronald S. Bultje committed
90
      (GBaseInitFunc) gst_rtpL16parse_base_init,
91 92 93 94 95 96 97 98 99 100 101 102 103 104
      NULL,
      (GClassInitFunc) gst_rtpL16parse_class_init,
      NULL,
      NULL,
      sizeof (GstRtpL16Parse),
      0,
      (GInstanceInitFunc) gst_rtpL16parse_init,
    };

    rtpL16parse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstRtpL16Parse", &rtpL16parse_info, 0);
  }
  return rtpL16parse_type;
}

Ronald S. Bultje's avatar
Ronald S. Bultje committed
105 106 107 108 109 110 111 112 113 114 115 116
static void
gst_rtpL16parse_base_init (GstRtpL16ParseClass * klass)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

  gst_element_class_add_pad_template (element_class,
		GST_PAD_TEMPLATE_GET (src_factory));
  gst_element_class_add_pad_template (element_class,
		GST_PAD_TEMPLATE_GET (sink_factory));
  gst_element_class_set_details (element_class, &gst_rtp_L16parse_details);
}

117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158
static void
gst_rtpL16parse_class_init (GstRtpL16ParseClass * klass)
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;

  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);

  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_PAYLOAD_TYPE, 
		g_param_spec_int ("payload_type", "payload_type", "payload type", 
			G_MININT, G_MAXINT, PAYLOAD_L16_STEREO, G_PARAM_READABLE));
  g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_FREQUENCY, 
		g_param_spec_int ("frequency", "frequency", "frequency", 
			G_MININT, G_MAXINT, 44100, G_PARAM_READWRITE));

  gobject_class->set_property = gst_rtpL16parse_set_property;
  gobject_class->get_property = gst_rtpL16parse_get_property;

  gstelement_class->change_state = gst_rtpL16parse_change_state;
}

static void
gst_rtpL16parse_init (GstRtpL16Parse * rtpL16parse)
{
  rtpL16parse->srcpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (src_factory), "src");
  rtpL16parse->sinkpad = gst_pad_new_from_template (GST_PAD_TEMPLATE_GET (sink_factory), "sink");
  gst_element_add_pad (GST_ELEMENT (rtpL16parse), rtpL16parse->srcpad);
  gst_element_add_pad (GST_ELEMENT (rtpL16parse), rtpL16parse->sinkpad);
  gst_pad_set_chain_function (rtpL16parse->sinkpad, gst_rtpL16parse_chain);

  rtpL16parse->frequency = 44100;
  rtpL16parse->channels = 2;

  rtpL16parse->payload_type = PAYLOAD_L16_STEREO;
}

void
gst_rtpL16parse_ntohs (GstBuffer *buf)
{
Zeeshan Ali's avatar
Zeeshan Ali committed
159
  gint16 *i, *len;
160 161

  /* FIXME: is this code correct or even sane at all? */
Zeeshan Ali's avatar
Zeeshan Ali committed
162 163
  i = (gint16 *) GST_BUFFER_DATA(buf); 
  len = i + GST_BUFFER_SIZE (buf) / sizeof (gint16 *);
164 165 166 167 168 169 170 171 172 173 174 175 176

  for (; i<len; i++) {
      *i = g_ntohs (*i);
  }
}

void
gst_rtpL16_caps_nego (GstRtpL16Parse *rtpL16parse)
{
  GstCaps *caps;

  caps = GST_CAPS_NEW (
		 "audio_raw",
177
		 "audio/x-raw-int",
178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207
		 "endianness",  GST_PROPS_INT (G_BYTE_ORDER), 
		 "signed", 	GST_PROPS_BOOLEAN (TRUE), 
		 "width", 	GST_PROPS_INT (16), 
		 "depth",	GST_PROPS_INT (16), 
		 "rate",	GST_PROPS_INT (rtpL16parse->frequency),
		 "channels", 	GST_PROPS_INT (rtpL16parse->channels));

  gst_pad_try_set_caps (rtpL16parse->srcpad, caps);
}

void
gst_rtpL16parse_payloadtype_change (GstRtpL16Parse *rtpL16parse, rtp_payload_t pt)
{
  rtpL16parse->payload_type = pt;
  
  switch (pt) {
	case PAYLOAD_L16_MONO:
      		rtpL16parse->channels = 1;
		break;
	case PAYLOAD_L16_STEREO:
      		rtpL16parse->channels = 2;
		break;
	default:
		g_warning ("unkown payload_t %d\n", pt);
  }

  gst_rtpL16_caps_nego (rtpL16parse);
}

static void
208
gst_rtpL16parse_chain (GstPad * pad, GstData *_data)
209
{
210
  GstBuffer *buf = GST_BUFFER (_data);
211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250
  GstRtpL16Parse *rtpL16parse;
  GstBuffer *outbuf;
  Rtp_Packet packet;
  rtp_payload_t pt;

  g_return_if_fail (pad != NULL);
  g_return_if_fail (GST_IS_PAD (pad));
  g_return_if_fail (buf != NULL);

  rtpL16parse = GST_RTP_L16_PARSE (GST_OBJECT_PARENT (pad));

  g_return_if_fail (rtpL16parse != NULL);
  g_return_if_fail (GST_IS_RTP_L16_PARSE (rtpL16parse));

  if (GST_IS_EVENT (buf)) {
    GstEvent *event = GST_EVENT (buf);
    gst_pad_event_default (pad, event);
  
    return;
  }

  if (GST_PAD_CAPS (rtpL16parse->srcpad) == NULL) {
    gst_rtpL16_caps_nego (rtpL16parse);
  }

  packet = rtp_packet_new_copy_data (GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));

  pt = rtp_packet_get_payload_type (packet);

  if (pt != rtpL16parse->payload_type) {
	gst_rtpL16parse_payloadtype_change (rtpL16parse, pt);
  }

  outbuf = gst_buffer_new ();
  GST_BUFFER_SIZE (outbuf) = rtp_packet_get_payload_len (packet);
  GST_BUFFER_DATA (outbuf) = g_malloc (GST_BUFFER_SIZE (outbuf));
  GST_BUFFER_TIMESTAMP (outbuf) = g_ntohl (rtp_packet_get_timestamp (packet)) * GST_SECOND;

  memcpy (GST_BUFFER_DATA (outbuf), rtp_packet_get_payload (packet), GST_BUFFER_SIZE (outbuf));
        
251
  GST_DEBUG ("gst_rtpL16parse_chain: pushing buffer of size %d", GST_BUFFER_SIZE(outbuf));
252 253 254 255 256 257

  /* FIXME: According to RFC 1890, this is required, right? */
#if G_BYTE_ORDER == G_LITTLE_ENDIAN
     gst_rtpL16parse_ntohs (outbuf);
#endif

258
  gst_pad_push (rtpL16parse->srcpad, GST_DATA (outbuf));
259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315

  rtp_packet_free (packet);
  gst_buffer_unref (buf);
}

static void
gst_rtpL16parse_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec)
{
  GstRtpL16Parse *rtpL16parse;

  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail (GST_IS_RTP_L16_PARSE (object));
  rtpL16parse = GST_RTP_L16_PARSE (object);

  switch (prop_id) {
    case ARG_PAYLOAD_TYPE:
      gst_rtpL16parse_payloadtype_change (rtpL16parse, g_value_get_int (value));
      break;
    case ARG_FREQUENCY:
      rtpL16parse->frequency = g_value_get_int (value);
      break;
    default:
      break;
  }
}

static void
gst_rtpL16parse_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec)
{
  GstRtpL16Parse *rtpL16parse;

  /* it's not null if we got it, but it might not be ours */
  g_return_if_fail (GST_IS_RTP_L16_PARSE (object));
  rtpL16parse = GST_RTP_L16_PARSE (object);

  switch (prop_id) {
    case ARG_PAYLOAD_TYPE:
      g_value_set_int (value, rtpL16parse->payload_type);
      break;
    case ARG_FREQUENCY:
      g_value_set_int (value, rtpL16parse->frequency);
      break;
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

static GstElementStateReturn
gst_rtpL16parse_change_state (GstElement * element)
{
  GstRtpL16Parse *rtpL16parse;

  g_return_val_if_fail (GST_IS_RTP_L16_PARSE (element), GST_STATE_FAILURE);

  rtpL16parse = GST_RTP_L16_PARSE (element);

316
  GST_DEBUG ("state pending %d\n", GST_STATE_PENDING (element));
317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334

  switch (GST_STATE_TRANSITION (element)) {
    case GST_STATE_NULL_TO_READY:
      break;
    case GST_STATE_READY_TO_NULL:
      break;
    default:
      break;
  }

  /* if we haven't failed already, give the parent class a chance to ;-) */
  if (GST_ELEMENT_CLASS (parent_class)->change_state)
    return GST_ELEMENT_CLASS (parent_class)->change_state (element);

  return GST_STATE_SUCCESS;
}

gboolean
Ronald S. Bultje's avatar
Ronald S. Bultje committed
335
gst_rtpL16parse_plugin_init (GstPlugin * plugin)
336
{
Ronald S. Bultje's avatar
Ronald S. Bultje committed
337 338
  return gst_element_register (plugin, "rtpL16parse",
			       GST_RANK_NONE, GST_TYPE_RTP_L16_PARSE);
339
}