gstrtpL16depay.c 8.33 KB
Newer Older
1
/* GStreamer
2
 * Copyright (C) <2007> Wim Taymans <wim@fluendo.com>
3 4 5 6 7 8 9 10 11
 *
 * 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
12 13 14 15 16 17
 * 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.
18 19
 */

20 21 22
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
23

24
#include <string.h>
25
#include <stdlib.h>
26

27
#include "gstrtpL16depay.h"
28 29 30

GST_DEBUG_CATEGORY_STATIC (rtpL16depay_debug);
#define GST_CAT_DEFAULT (rtpL16depay_debug)
31 32

/* elementfactory information */
33
static const GstElementDetails gst_rtp_L16_depay_details =
34
GST_ELEMENT_DETAILS ("RTP packet depayloader",
Wim Taymans's avatar
Wim Taymans committed
35
    "Codec/Depayloader/Network",
Wim Taymans's avatar
Wim Taymans committed
36
    "Extracts raw audio from RTP packets",
37
    "Zeeshan Ali <zak147@yahoo.com>," "Wim Taymans <wim@fluendo.com>");
38

39
/* RtpL16Depay signals and args */
40 41 42 43 44 45 46 47 48 49
enum
{
  LAST_SIGNAL
};

enum
{
  ARG_0,
};

50
static GstStaticPadTemplate gst_rtp_L16_depay_src_template =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
51
GST_STATIC_PAD_TEMPLATE ("src",
David Schleef's avatar
David Schleef committed
52 53
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
54
    GST_STATIC_CAPS ("audio/x-raw-int, "
55
        "endianness = (int) BIG_ENDIAN, "
56 57 58
        "signed = (boolean) true, "
        "width = (int) 16, "
        "depth = (int) 16, "
59
        "rate = (int) [ 1, MAX ], " "channels = (int) [ 1, MAX ]")
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
60
    );
David Schleef's avatar
David Schleef committed
61

62 63
static GstStaticPadTemplate gst_rtp_L16_depay_sink_template =
    GST_STATIC_PAD_TEMPLATE ("sink",
David Schleef's avatar
David Schleef committed
64 65
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81
    GST_STATIC_CAPS ("application/x-rtp, "
        "media = (string) \"audio\", "
        "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
        "clock-rate = (int) [ 1, MAX ], "
        /* "channels = (int) [1, MAX]"  */
        /* "emphasis = (string) ANY" */
        /* "channel-order = (string) ANY" */
        "encoding-name = (string) \"L16\";"
        "application/x-rtp, "
        "media = (string) \"audio\", "
        "payload = (int) { " GST_RTP_PAYLOAD_L16_STEREO_STRING ", "
        GST_RTP_PAYLOAD_L16_MONO_STRING " }," "clock-rate = (int) [ 1, MAX ]"
        /* "channels = (int) [1, MAX]" */
        /* "emphasis = (string) ANY" */
        /* "channel-order = (string) ANY" */
    )
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
82
    );
83

84 85
GST_BOILERPLATE (GstRtpL16Depay, gst_rtp_L16_depay, GstBaseRTPDepayload,
    GST_TYPE_BASE_RTP_DEPAYLOAD);
86

87 88 89 90
static gboolean gst_rtp_L16_depay_setcaps (GstBaseRTPDepayload * depayload,
    GstCaps * caps);
static GstBuffer *gst_rtp_L16_depay_process (GstBaseRTPDepayload * depayload,
    GstBuffer * buf);
91

92
static void gst_rtp_L16_depay_set_property (GObject * object, guint prop_id,
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
93
    const GValue * value, GParamSpec * pspec);
94
static void gst_rtp_L16_depay_get_property (GObject * object, guint prop_id,
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
95
    GValue * value, GParamSpec * pspec);
96

97 98
static GstStateChangeReturn gst_rtp_L16_depay_change_state (GstElement *
    element, GstStateChange transition);
99

Ronald S. Bultje's avatar
Ronald S. Bultje committed
100
static void
101
gst_rtp_L16_depay_base_init (gpointer klass)
Ronald S. Bultje's avatar
Ronald S. Bultje committed
102 103 104 105
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);

  gst_element_class_add_pad_template (element_class,
106
      gst_static_pad_template_get (&gst_rtp_L16_depay_src_template));
Ronald S. Bultje's avatar
Ronald S. Bultje committed
107
  gst_element_class_add_pad_template (element_class,
108 109 110
      gst_static_pad_template_get (&gst_rtp_L16_depay_sink_template));

  gst_element_class_set_details (element_class, &gst_rtp_L16_depay_details);
Ronald S. Bultje's avatar
Ronald S. Bultje committed
111 112
}

113
static void
114
gst_rtp_L16_depay_class_init (GstRtpL16DepayClass * klass)
115 116 117
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;
118
  GstBaseRTPDepayloadClass *gstbasertpdepayload_class;
119 120 121

  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
122
  gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
123

124
  parent_class = g_type_class_peek_parent (klass);
125

126 127 128 129
  gobject_class->set_property = gst_rtp_L16_depay_set_property;
  gobject_class->get_property = gst_rtp_L16_depay_get_property;

  gstelement_class->change_state = gst_rtp_L16_depay_change_state;
130

131 132
  gstbasertpdepayload_class->set_caps = gst_rtp_L16_depay_setcaps;
  gstbasertpdepayload_class->process = gst_rtp_L16_depay_process;
133

134 135
  GST_DEBUG_CATEGORY_INIT (rtpL16depay_debug, "rtpL16depay", 0,
      "Raw Audio RTP Depayloader");
136 137 138
}

static void
139 140
gst_rtp_L16_depay_init (GstRtpL16Depay * rtpL16depay,
    GstRtpL16DepayClass * klass)
141 142 143
{
}

144 145 146
static gint
gst_rtp_L16_depay_parse_int (GstStructure * structure, const gchar * field,
    gint def)
147
{
148 149
  const gchar *str;
  gint res;
150

151 152
  if ((str = gst_structure_get_string (structure, field)))
    return atoi (str);
153

154 155 156 157
  if (gst_structure_get_int (structure, field, &res))
    return res;

  return def;
158 159
}

160 161
static gboolean
gst_rtp_L16_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
162
{
163 164 165 166 167
  GstStructure *structure;
  GstRtpL16Depay *rtpL16depay;
  gint clock_rate, payload;
  gint channels;
  GstCaps *srccaps;
David Schleef's avatar
David Schleef committed
168

169
  rtpL16depay = GST_RTP_L16_DEPAY (depayload);
170

171
  structure = gst_caps_get_structure (caps, 0);
172

173 174 175 176 177 178
  payload = 96;
  gst_structure_get_int (structure, "payload", &payload);
  switch (payload) {
    case GST_RTP_PAYLOAD_L16_STEREO:
      channels = 2;
      clock_rate = 44100;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
179
      break;
180 181 182
    case GST_RTP_PAYLOAD_L16_MONO:
      channels = 1;
      clock_rate = 44100;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
183 184
      break;
    default:
185 186 187
      channels = 0;
      clock_rate = 0;
      break;
188 189
  }

190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209
  /* caps can overwrite defaults */
  clock_rate =
      gst_rtp_L16_depay_parse_int (structure, "clock-rate", clock_rate);
  channels = gst_rtp_L16_depay_parse_int (structure, "channels", channels);

  depayload->clock_rate = clock_rate;
  rtpL16depay->rate = clock_rate;
  rtpL16depay->channels = channels;

  srccaps = gst_caps_new_simple ("audio/x-raw-int",
      "endianness", G_TYPE_INT, G_BIG_ENDIAN,
      "signed", G_TYPE_BOOLEAN, TRUE,
      "width", G_TYPE_INT, 16,
      "depth", G_TYPE_INT, 16,
      "rate", G_TYPE_INT, clock_rate, "channels", G_TYPE_INT, channels, NULL);

  gst_pad_set_caps (depayload->srcpad, srccaps);
  gst_caps_unref (srccaps);

  return TRUE;
210 211
}

212 213
static GstBuffer *
gst_rtp_L16_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf)
214
{
215
  GstRtpL16Depay *rtpL16depay;
216 217
  GstBuffer *outbuf;

218
  rtpL16depay = GST_RTP_L16_DEPAY (depayload);
219

220 221
  if (!gst_rtp_buffer_validate (buf))
    goto bad_packet;
222

223 224
  {
    gint payload_len;
225

226
    payload_len = gst_rtp_buffer_get_payload_len (buf);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
227

228 229
    if (payload_len <= 0)
      goto empty_packet;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
230

231
    GST_DEBUG_OBJECT (rtpL16depay, "got payload of %d bytes", payload_len);
232

233
    outbuf = gst_rtp_buffer_get_payload_buffer (buf);
234

235
    return outbuf;
236
  }
237
  return NULL;
238

239 240 241 242 243 244 245 246 247 248 249 250
bad_packet:
  {
    GST_ELEMENT_WARNING (rtpL16depay, STREAM, DECODE,
        ("Packet did not validate."), (NULL));
    return NULL;
  }
empty_packet:
  {
    GST_ELEMENT_WARNING (rtpL16depay, STREAM, DECODE,
        ("Empty Payload."), (NULL));
    return NULL;
  }
251 252 253
}

static void
254
gst_rtp_L16_depay_set_property (GObject * object, guint prop_id,
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
255
    const GValue * value, GParamSpec * pspec)
256
{
257
  GstRtpL16Depay *rtpL16depay;
258

259
  rtpL16depay = GST_RTP_L16_DEPAY (object);
260 261 262

  switch (prop_id) {
    default:
263
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
264 265 266 267 268
      break;
  }
}

static void
269
gst_rtp_L16_depay_get_property (GObject * object, guint prop_id, GValue * value,
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
270
    GParamSpec * pspec)
271
{
272
  GstRtpL16Depay *rtpL16depay;
273

274
  rtpL16depay = GST_RTP_L16_DEPAY (object);
275 276 277 278 279 280 281 282

  switch (prop_id) {
    default:
      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
      break;
  }
}

283
static GstStateChangeReturn
284
gst_rtp_L16_depay_change_state (GstElement * element, GstStateChange transition)
285
{
286
  GstRtpL16Depay *rtpL16depay;
Wim Taymans's avatar
Wim Taymans committed
287
  GstStateChangeReturn ret;
288

289
  rtpL16depay = GST_RTP_L16_DEPAY (element);
290

291 292
  switch (transition) {
    case GST_STATE_CHANGE_NULL_TO_READY:
293
      break;
Wim Taymans's avatar
Wim Taymans committed
294 295 296
    default:
      break;
  }
297

Wim Taymans's avatar
Wim Taymans committed
298 299 300
  ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);

  switch (transition) {
301
    case GST_STATE_CHANGE_READY_TO_NULL:
302 303 304 305
      break;
    default:
      break;
  }
Wim Taymans's avatar
Wim Taymans committed
306
  return ret;
307 308 309
}

gboolean
310
gst_rtp_L16_depay_plugin_init (GstPlugin * plugin)
311
{
312
  return gst_element_register (plugin, "rtpL16depay",
Wim Taymans's avatar
Wim Taymans committed
313
      GST_RANK_MARGINAL, GST_TYPE_RTP_L16_DEPAY);
314
}