gstgsmenc.c 7.08 KB
Newer Older
Andy Wingo Wingo's avatar
Andy Wingo Wingo committed
1
/* GStreamer
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
 * 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 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.
 */


21 22 23
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
24 25 26 27 28 29
#include <string.h>

#include "gstgsmenc.h"

/* elementfactory information */
GstElementDetails gst_gsmenc_details = {
30 31 32
  "GSM audio encoder",
  "Codec/Encoder/Audio",
  "Encodes audio using GSM",
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
33 34 35 36
  "Wim Taymans <wim.taymans@chello.be>",
};

/* GSMEnc signals and args */
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
37 38
enum
{
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
39 40 41 42 43
  FRAME_ENCODED,
  /* FILL ME */
  LAST_SIGNAL
};

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
44 45
enum
{
46 47
  ARG_0
      /* FILL ME */
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
48 49
};

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
50 51 52
static void gst_gsmenc_base_init (gpointer g_class);
static void gst_gsmenc_class_init (GstGSMEnc * klass);
static void gst_gsmenc_init (GstGSMEnc * gsmenc);
53

54
static GstFlowReturn gst_gsmenc_chain (GstPad * pad, GstBuffer * buf);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
55 56 57 58

static GstElementClass *parent_class = NULL;
static guint gst_gsmenc_signals[LAST_SIGNAL] = { 0 };

59 60 61
static gboolean gst_gsmenc_sink_event (GstPad * pad, GstEvent * event);


Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
62 63 64 65 66 67 68 69
GType
gst_gsmenc_get_type (void)
{
  static GType gsmenc_type = 0;

  if (!gsmenc_type) {
    static const GTypeInfo gsmenc_info = {
      sizeof (GstGSMEncClass),
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
70
      gst_gsmenc_base_init,
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
71 72 73 74 75 76 77 78
      NULL,
      (GClassInitFunc) gst_gsmenc_class_init,
      NULL,
      NULL,
      sizeof (GstGSMEnc),
      0,
      (GInstanceInitFunc) gst_gsmenc_init,
    };
79

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
80
    gsmenc_type =
81
        g_type_register_static (GST_TYPE_ELEMENT, "GstGSMEnc", &gsmenc_info, 0);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
82 83 84 85
  }
  return gsmenc_type;
}

David Schleef's avatar
David Schleef committed
86
static GstStaticPadTemplate gsmenc_src_template =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
87 88 89
GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
90
    GST_STATIC_CAPS ("audio/x-gsm, " "rate = (int) 8000, " "channels = (int) 1")
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
91
    );
David Schleef's avatar
David Schleef committed
92 93

static GstStaticPadTemplate gsmenc_sink_template =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
94 95 96 97
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("audio/x-raw-int, "
98 99 100
        "endianness = (int) BYTE_ORDER, "
        "signed = (boolean) true, "
        "width = (int) 16, "
101
        "depth = (int) 16, " "rate = (int) 8000, " "channels = (int) 1")
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
102
    );
Iain Holmes's avatar
Iain Holmes committed
103 104 105 106 107 108

static void
gst_gsmenc_base_init (gpointer g_class)
{
  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);

David Schleef's avatar
David Schleef committed
109 110 111 112
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gsmenc_sink_template));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&gsmenc_src_template));
Iain Holmes's avatar
Iain Holmes committed
113 114
  gst_element_class_set_details (element_class, &gst_gsmenc_details);
}
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
115

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
116
static void
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
117
gst_gsmenc_class_init (GstGSMEnc * klass)
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
118 119 120 121
{
  GObjectClass *gobject_class;
  GstElementClass *gstelement_class;

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
122 123
  gobject_class = (GObjectClass *) klass;
  gstelement_class = (GstElementClass *) klass;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
124 125 126 127

  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);

  gst_gsmenc_signals[FRAME_ENCODED] =
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
128 129 130
      g_signal_new ("frame-encoded", G_TYPE_FROM_CLASS (klass),
      G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstGSMEncClass, frame_encoded), NULL,
      NULL, g_cclosure_marshal_VOID__VOID, G_TYPE_NONE, 0);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
131 132 133 134
}


static void
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
135
gst_gsmenc_init (GstGSMEnc * gsmenc)
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
136 137
{
  /* create the sink and src pads */
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
138 139 140
  gsmenc->sinkpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&gsmenc_sink_template), "sink");
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
141 142
  gst_element_add_pad (GST_ELEMENT (gsmenc), gsmenc->sinkpad);
  gst_pad_set_chain_function (gsmenc->sinkpad, gst_gsmenc_chain);
143
  gst_pad_set_event_function (gsmenc->sinkpad, gst_gsmenc_sink_event);
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
144

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
145 146 147
  gsmenc->srcpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&gsmenc_src_template), "src");
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
148 149 150 151 152
  gst_element_add_pad (GST_ELEMENT (gsmenc), gsmenc->srcpad);

  gsmenc->state = gsm_create ();
  gsmenc->bufsize = 0;
  gsmenc->next_ts = 0;
153
  gsmenc->firstBuf = TRUE;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
154 155
}

156 157
static gboolean
gst_gsmenc_sink_event (GstPad * pad, GstEvent * event)
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
158
{
159

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
160 161 162
  GstGSMEnc *gsmenc;

  gsmenc = GST_GSMENC (GST_OBJECT_PARENT (pad));
163 164 165 166 167 168 169 170 171
  gboolean ret = TRUE;

  switch (GST_EVENT_TYPE (event)) {
    case GST_EVENT_EOS:
    {
      GST_STREAM_LOCK (pad);
      ret = gst_pad_push_event (gsmenc->srcpad, event);
      GST_STREAM_UNLOCK (pad);
      break;
172
    }
173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195
    case GST_EVENT_NEWSEGMENT:
    {
      /* drop the discontinuity */
      gst_event_unref (event);
      break;
    }
    default:
    {
      gst_pad_event_default (pad, event);
      break;
    }
  }
  return ret;

}

static GstFlowReturn
gst_gsmenc_chain (GstPad * pad, GstBuffer * buf)
{
  GstGSMEnc *gsmenc;
  gsm_signal *data;
  guint size;
  GstFlowReturn ret = GST_FLOW_OK;
196

197
  gsmenc = GST_GSMENC (gst_pad_get_parent (pad));
198

199 200
  data = (gsm_signal *) GST_BUFFER_DATA (buf);
  size = GST_BUFFER_SIZE (buf) / sizeof (gsm_signal);
201

202 203
  if (gsmenc->bufsize && (gsmenc->bufsize + size >= 160)) {
    GstBuffer *outbuf;
204

205 206
    memcpy (gsmenc->buffer + gsmenc->bufsize, data,
        (160 - gsmenc->bufsize) * sizeof (gsm_signal));
207

208 209 210 211
    outbuf = gst_buffer_new_and_alloc (33 * sizeof (gsm_byte));
    GST_BUFFER_TIMESTAMP (outbuf) = gsmenc->next_ts;
    GST_BUFFER_DURATION (outbuf) = 20 * GST_MSECOND;
    gsmenc->next_ts += 20 * GST_MSECOND;
212

213 214
    gsm_encode (gsmenc->state, gsmenc->buffer,
        (gsm_byte *) GST_BUFFER_DATA (outbuf));
215

216
    gst_buffer_set_caps (outbuf, GST_PAD_CAPS (gsmenc->srcpad));
217

218 219 220 221 222
    if (gsmenc->firstBuf) {
      gst_pad_push_event (gsmenc->srcpad,
          gst_event_new_newsegment (FALSE, 1.0, GST_FORMAT_DEFAULT,
              0, GST_CLOCK_TIME_NONE, 0));
      gsmenc->firstBuf = FALSE;
223 224
    }

225 226 227 228 229 230
    ret = gst_pad_push (gsmenc->srcpad, outbuf);

    if (ret != GST_FLOW_OK) {
      gst_buffer_unref (outbuf);
      goto error;
    }
231

232 233 234
    size -= (160 - gsmenc->bufsize);
    data += (160 - gsmenc->bufsize);
    gsmenc->bufsize = 0;
235

236
  }
237

238 239
  while (size >= 160) {
    GstBuffer *outbuf;
240

241 242 243 244
    outbuf = gst_buffer_new_and_alloc (33 * sizeof (gsm_byte));
    GST_BUFFER_TIMESTAMP (outbuf) = gsmenc->next_ts;
    GST_BUFFER_DURATION (outbuf) = 20 * GST_MSECOND;
    gsmenc->next_ts += 20 * GST_MSECOND;
245

246
    gsm_encode (gsmenc->state, data, (gsm_byte *) GST_BUFFER_DATA (outbuf));
247

248 249 250 251 252 253
    gst_buffer_set_caps (outbuf, GST_PAD_CAPS (gsmenc->srcpad));
    if (gsmenc->firstBuf) {
      gst_pad_push_event (gsmenc->srcpad,
          gst_event_new_newsegment (FALSE, 1.0, GST_FORMAT_DEFAULT,
              0, GST_CLOCK_TIME_NONE, 0));
      gsmenc->firstBuf = FALSE;
254
    }
255
    ret = gst_pad_push (gsmenc->srcpad, outbuf);
256

257 258 259
    if (ret != GST_FLOW_OK) {
      gst_buffer_unref (outbuf);
      goto error;
260 261
    }

262 263 264 265 266 267 268
    size -= 160;
    data += 160;
  }

  if (size) {
    memcpy (gsmenc->buffer + gsmenc->bufsize, data, size * sizeof (gsm_signal));
    gsmenc->bufsize += size;
Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
269
  }
270 271 272 273 274 275

error:

  gst_object_unref (gsmenc);
  return ret;

Thomas Vander Stichele's avatar
Thomas Vander Stichele committed
276
}