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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
*
* gstosxaudiosrc.c:
*
* 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 <fcntl.h>
#include <errno.h>
#include <unistd.h>
#include <string.h>
#include <CoreAudio/CoreAudio.h>
#include <gstosxaudiosrc.h>
#include <gstosxaudioelement.h>
/* elementfactory information */
static GstElementDetails gst_osxaudiosrc_details =
GST_ELEMENT_DETAILS ("Audio Source (Mac OS X)",
"Source/Audio",
"Read from the sound card",
"Zaheer Abbas Merali <zaheerabbas at merali dot org>");
/* Osxaudiosrc signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
static GstStaticPadTemplate osxaudiosrc_src_factory =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("audio/x-raw-float, "
"endianness = (int) BYTE_ORDER, "
"signed = (boolean) TRUE , "
"width = (int) 32, " "rate = (int) 44100, " "channels = (int) 2")
);
static void gst_osxaudiosrc_base_init (gpointer g_class);
static void gst_osxaudiosrc_class_init (GstOsxAudioSrcClass * klass);
static void gst_osxaudiosrc_init (GstOsxAudioSrc * osxaudiosrc);
static void gst_osxaudiosrc_dispose (GObject * object);
static GstElementStateReturn gst_osxaudiosrc_change_state (GstElement *
element);
static GstData *gst_osxaudiosrc_get (GstPad * pad);
static GstElementClass *parent_class = NULL;
/*static guint gst_osxaudiosrc_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_osxaudiosrc_get_type (void)
{
static GType osxaudiosrc_type = 0;
if (!osxaudiosrc_type) {
static const GTypeInfo osxaudiosrc_info = {
sizeof (GstOsxAudioSrcClass),
gst_osxaudiosrc_base_init,
NULL,
(GClassInitFunc) gst_osxaudiosrc_class_init,
NULL,
NULL,
sizeof (GstOsxAudioSrc),
0,
(GInstanceInitFunc) gst_osxaudiosrc_init,
};
osxaudiosrc_type =
g_type_register_static (GST_TYPE_OSXAUDIOELEMENT, "GstOsxAudioSrc",
&osxaudiosrc_info, 0);
}
return osxaudiosrc_type;
}
static void
gst_osxaudiosrc_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &gst_osxaudiosrc_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&osxaudiosrc_src_factory));
}
static void
gst_osxaudiosrc_class_init (GstOsxAudioSrcClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_OSXAUDIOELEMENT);
gobject_class->dispose = gst_osxaudiosrc_dispose;
gstelement_class->change_state = gst_osxaudiosrc_change_state;
}
static void
gst_osxaudiosrc_init (GstOsxAudioSrc * osxaudiosrc)
{
osxaudiosrc->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&osxaudiosrc_src_factory), "src");
gst_pad_set_get_function (osxaudiosrc->srcpad, gst_osxaudiosrc_get);
gst_element_add_pad (GST_ELEMENT (osxaudiosrc), osxaudiosrc->srcpad);
}
static void
gst_osxaudiosrc_dispose (GObject * object)
{
/* GstOsxAudioSrc *osxaudiosrc = (GstOsxAudioSrc *) object; */
G_OBJECT_CLASS (parent_class)->dispose (object);
}
static GstData *
gst_osxaudiosrc_get (GstPad * pad)
{
GstOsxAudioSrc *src;
GstBuffer *buf;
glong readbytes;
src = GST_OSXAUDIOSRC (gst_pad_get_parent (pad));
buf = gst_buffer_new_and_alloc ((GST_OSXAUDIOELEMENT (src))->buffer_len);
readbytes =
read_buffer (GST_OSXAUDIOELEMENT (src), (char *) GST_BUFFER_DATA (buf));
if (readbytes < 0) {
gst_buffer_unref (buf);
GST_ELEMENT_ERROR (src, RESOURCE, READ, (NULL), GST_ERROR_SYSTEM);
return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
}
if (readbytes == 0) {
gst_buffer_unref (buf);
return GST_DATA (gst_event_new (GST_EVENT_INTERRUPT));
}
GST_BUFFER_SIZE (buf) = readbytes;
GST_BUFFER_OFFSET (buf) = src->curoffset;
src->curoffset += readbytes;
GST_DEBUG ("pushed buffer from soundcard of %ld bytes", readbytes);
return GST_DATA (buf);
}
static GstElementStateReturn
gst_osxaudiosrc_change_state (GstElement * element)
{
GstOsxAudioSrc *osxaudiosrc = GST_OSXAUDIOSRC (element);
OSErr status;
GST_DEBUG ("osxaudiosrc: state change");
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_PAUSED:
osxaudiosrc->curoffset = 0;
break;
case GST_STATE_PAUSED_TO_PLAYING:
status =
AudioDeviceStart (GST_OSXAUDIOELEMENT (osxaudiosrc)->device_id,
inputAudioDeviceIOProc);
if (status)
GST_DEBUG ("AudioDeviceStart returned %d\n", (int) status);
break;
case GST_STATE_PLAYING_TO_PAUSED:
status =
AudioDeviceStop (GST_OSXAUDIOELEMENT (osxaudiosrc)->device_id,
inputAudioDeviceIOProc);
if (status)
GST_DEBUG ("AudioDeviceStop returned %d\n", (int) status);
break;
case GST_STATE_PAUSED_TO_READY:
break;
default:
break;
}
if (GST_ELEMENT_CLASS (parent_class)->change_state)
return GST_ELEMENT_CLASS (parent_class)->change_state (element);
return GST_STATE_SUCCESS;
}
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