gstreamer/gst/law/alaw.c

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "alaw-encode.h"
#include "alaw-decode.h"

static GstCaps*
alaw_factory (void)
{
  return gst_caps_new_simple ("audio/x-alaw",
      "rate",     GST_TYPE_INT_RANGE, 8000, 192000,
      "channels", GST_TYPE_INT_RANGE, 1, 2,
      NULL);
}

static GstCaps*
linear_factory (void)
{
  return gst_caps_new_simple ("audio/x-raw-int",
      "width",      G_TYPE_INT, 16,
      "depth",      G_TYPE_INT, 16,
      "endianness", G_TYPE_INT, G_BYTE_ORDER,
      "signed",     G_TYPE_BOOLEAN, TRUE,
      "rate",       GST_TYPE_INT_RANGE, 8000, 192000,
      "channels",   GST_TYPE_INT_RANGE, 1, 2,
      NULL);
}

GstPadTemplate *alawenc_src_template, *alawenc_sink_template;
GstPadTemplate *alawdec_src_template, *alawdec_sink_template;

static gboolean
plugin_init (GstPlugin *plugin)
{
  GstCaps* alaw_caps, *linear_caps;

  alaw_caps = alaw_factory ();
  linear_caps = linear_factory ();

  alawenc_src_template = gst_pad_template_new ("src",GST_PAD_SRC,GST_PAD_ALWAYS,alaw_caps);
  alawenc_sink_template = gst_pad_template_new ("sink",GST_PAD_SINK,GST_PAD_ALWAYS,linear_caps);

  alawdec_src_template = gst_pad_template_new ("src",GST_PAD_SRC,GST_PAD_ALWAYS,linear_caps);
  alawdec_sink_template = gst_pad_template_new ("sink",GST_PAD_SINK,GST_PAD_ALWAYS,alaw_caps);

  if (!gst_element_register (plugin, "alawenc",
			     GST_RANK_NONE, GST_TYPE_ALAWENC) ||
      !gst_element_register (plugin, "alawdec",
			     GST_RANK_PRIMARY, GST_TYPE_ALAWENC))
    return FALSE;

  return TRUE;
}

GST_PLUGIN_DEFINE (
  GST_VERSION_MAJOR,
  GST_VERSION_MINOR,
  "alaw",
  "ALaw audio conversion routines",
  plugin_init,
  VERSION,
  GST_LICENSE,
  GST_PACKAGE,
  GST_ORIGIN
)