gstreamer/ext/speex/gstspeexdec.c

/* 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 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 <string.h>

#include "gstspeexdec.h"

/* elementfactory information */
GstElementDetails gst_speexdec_details = {
  "speex audio decoder",
  "Codec/Decoder/Audio",
  ".speex",
  "Wim Taymans <wim.taymans@chello.be>",
};

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

enum
{
  ARG_0
      /* FILL ME */
};

static void gst_speexdec_base_init (gpointer g_class);
static void gst_speexdec_class_init (GstSpeexDec * klass);
static void gst_speexdec_init (GstSpeexDec * speexdec);

static void gst_speexdec_chain (GstPad * pad, GstData * _data);
static GstPadLinkReturn gst_speexdec_sinkconnect (GstPad * pad,
    const GstCaps * caps);

static GstElementClass *parent_class = NULL;

/*static guint gst_speexdec_signals[LAST_SIGNAL] = { 0 }; */

GType
gst_speexdec_get_type (void)
{
  static GType speexdec_type = 0;

  if (!speexdec_type) {
    static const GTypeInfo speexdec_info = {
      sizeof (GstSpeexDecClass),
      gst_speexdec_base_init,
      NULL,
      (GClassInitFunc) gst_speexdec_class_init,
      NULL,
      NULL,
      sizeof (GstSpeexDec),
      0,
      (GInstanceInitFunc) gst_speexdec_init,
    };

    speexdec_type =
        g_type_register_static (GST_TYPE_ELEMENT, "GstSpeexDec", &speexdec_info,
        0);
  }
  return speexdec_type;
}

static GstStaticPadTemplate speexdec_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
    GST_PAD_SINK,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("audio/x-speex, "
        "rate = (int) [ 1000, 48000 ], " "channels = (int) 1")
    );

static GstStaticPadTemplate speexdec_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
    GST_PAD_SRC,
    GST_PAD_ALWAYS,
    GST_STATIC_CAPS ("audio/x-raw-int, "
        "endianness = (int) BYTE_ORDER, "
        "signed = (boolean) true, "
        "width = (int) 16, "
        "depth = (int) 16, "
        "rate = (int) [ 1000, 48000 ], " "channels = (int) 1")
    );

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

  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&speexdec_src_template));
  gst_element_class_add_pad_template (element_class,
      gst_static_pad_template_get (&speexdec_sink_template));

  gst_element_class_set_details (element_class, &gst_speexdec_details);
}

static void
gst_speexdec_class_init (GstSpeexDec * klass)
{
  GstElementClass *gstelement_class;

  gstelement_class = (GstElementClass *) klass;

  parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
}

static void
gst_speexdec_init (GstSpeexDec * speexdec)
{
  GST_DEBUG ("gst_speexdec_init: initializing");

  /* create the sink and src pads */
  speexdec->sinkpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&speexdec_sink_template), "sink");
  gst_element_add_pad (GST_ELEMENT (speexdec), speexdec->sinkpad);
  gst_pad_set_chain_function (speexdec->sinkpad, gst_speexdec_chain);
  gst_pad_set_link_function (speexdec->sinkpad, gst_speexdec_sinkconnect);

  speexdec->srcpad =
      gst_pad_new_from_template (gst_static_pad_template_get
      (&speexdec_src_template), "src");
  gst_pad_use_explicit_caps (speexdec->srcpad);
  gst_element_add_pad (GST_ELEMENT (speexdec), speexdec->srcpad);

}

static GstPadLinkReturn
gst_speexdec_sinkconnect (GstPad * pad, const GstCaps * caps)
{
  GstSpeexDec *speexdec;
  gint rate;
  GstStructure *structure;

  speexdec = GST_SPEEXDEC (gst_pad_get_parent (pad));

  structure = gst_caps_get_structure (caps, 0);
  gst_structure_get_int (structure, "rate", &rate);

  if (gst_pad_set_explicit_caps (speexdec->srcpad,
          gst_caps_new_simple ("audio/x-raw-int",
              "endianness", G_TYPE_INT, G_BYTE_ORDER,
              "signed", G_TYPE_BOOLEAN, TRUE,
              "width", G_TYPE_INT, 16,
              "depth", G_TYPE_INT, 16,
              "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, 1, NULL))) {
    return GST_PAD_LINK_OK;
  }
  return GST_PAD_LINK_REFUSED;
}

static void
gst_speexdec_chain (GstPad * pad, GstData * _data)
{
  GstBuffer *buf = GST_BUFFER (_data);
  GstSpeexDec *speexdec;
  gchar *data;
  guint size;

  g_return_if_fail (pad != NULL);
  g_return_if_fail (GST_IS_PAD (pad));
  g_return_if_fail (buf != NULL);
  /*g_return_if_fail(GST_IS_BUFFER(buf)); */

  speexdec = GST_SPEEXDEC (gst_pad_get_parent (pad));

  data = GST_BUFFER_DATA (buf);
  size = GST_BUFFER_SIZE (buf);

  gst_buffer_unref (buf);
}