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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstosxaudioelement.h:
*
* 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.
*/
#ifndef __GST_OSXAUDIO_ELEMENT_H__
#define __GST_OSXAUDIO_ELEMENT_H__
#include <gst/gst.h>
#include <CoreAudio/CoreAudio.h>
#include <pthread.h>
/* debugging category */
GST_DEBUG_CATEGORY_EXTERN (osxaudio_debug);
#define GST_CAT_DEFAULT osxaudio_debug
G_BEGIN_DECLS
OSStatus outputAudioDeviceIOProc(AudioDeviceID inDevice, const AudioTimeStamp *inNow, const AudioBufferList *inInputData, const AudioTimeStamp *inInputTime, AudioBufferList *outOutputData, const AudioTimeStamp *inOutputTime, void *inClientData);
OSStatus inputAudioDeviceIOProc(AudioDeviceID inDevice, const AudioTimeStamp *inNow, const AudioBufferList *inInputData, const AudioTimeStamp *inInputTime, AudioBufferList *outOutputData, const AudioTimeStamp *inOutputTime, void *inClientData);
#define GST_TYPE_OSXAUDIOELEMENT \
(gst_osxaudioelement_get_type())
#define GST_OSXAUDIOELEMENT(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OSXAUDIOELEMENT,GstOsxAudioElement))
#define GST_OSXAUDIOELEMENT_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OSXAUDIOELEMENT,GstOsxAudioElementClass))
#define GST_IS_OSXAUDIOELEMENT(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OSXAUDIOELEMENT))
#define GST_IS_OSXAUDIOELEMENT_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OSXAUDIOELEMENT))
#define GST_OSXAUDIOELEMENT_GET_CLASS(obj) \
(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OSXAUDIOELEMENT, GstOsxAudioElementClass))
typedef struct _GstOsxAudioElement GstOsxAudioElement;
typedef struct _GstOsxAudioElementClass GstOsxAudioElementClass;
/* This is large, but best (maybe it should be even larger).
* CoreAudio supposedly has an internal latency in the order of 2ms */
#define NUM_BUFS 128
struct _GstOsxAudioElement
{
/* yes, we're a gstelement too */
GstElement parent;
pthread_mutex_t buffer_mutex; /* mutex covering buffer variables */
AudioDeviceID device_id;
unsigned char *buffer[NUM_BUFS];
unsigned int buffer_len;
unsigned int buf_read;
unsigned int buf_write;
unsigned int buf_read_pos;
unsigned int buf_write_pos;
int full_buffers;
int buffered_bytes;
};
struct _GstOsxAudioElementClass {
GstElementClass klass;
GList *device_combinations;
};
GType gst_osxaudioelement_get_type (void);
int read_buffer(GstOsxAudioElement* osxaudio, unsigned char* data);
int write_buffer(GstOsxAudioElement* osxaudio, unsigned char* data, int len);
G_END_DECLS
#endif /* __GST_OSXAUDIO_ELEMENT_H__ */
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