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91 lines
3.3 KiB
C
91 lines
3.3 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstosxaudioelement.h:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_OSXAUDIO_ELEMENT_H__
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#define __GST_OSXAUDIO_ELEMENT_H__
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#include <gst/gst.h>
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#include <CoreAudio/CoreAudio.h>
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#include <pthread.h>
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/* debugging category */
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GST_DEBUG_CATEGORY_EXTERN (osxaudio_debug);
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#define GST_CAT_DEFAULT osxaudio_debug
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G_BEGIN_DECLS
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OSStatus outputAudioDeviceIOProc(AudioDeviceID inDevice, const AudioTimeStamp *inNow, const AudioBufferList *inInputData, const AudioTimeStamp *inInputTime, AudioBufferList *outOutputData, const AudioTimeStamp *inOutputTime, void *inClientData);
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OSStatus inputAudioDeviceIOProc(AudioDeviceID inDevice, const AudioTimeStamp *inNow, const AudioBufferList *inInputData, const AudioTimeStamp *inInputTime, AudioBufferList *outOutputData, const AudioTimeStamp *inOutputTime, void *inClientData);
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#define GST_TYPE_OSXAUDIOELEMENT \
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(gst_osxaudioelement_get_type())
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#define GST_OSXAUDIOELEMENT(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_OSXAUDIOELEMENT,GstOsxAudioElement))
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#define GST_OSXAUDIOELEMENT_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_OSXAUDIOELEMENT,GstOsxAudioElementClass))
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#define GST_IS_OSXAUDIOELEMENT(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_OSXAUDIOELEMENT))
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#define GST_IS_OSXAUDIOELEMENT_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_OSXAUDIOELEMENT))
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#define GST_OSXAUDIOELEMENT_GET_CLASS(obj) \
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(G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_OSXAUDIOELEMENT, GstOsxAudioElementClass))
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typedef struct _GstOsxAudioElement GstOsxAudioElement;
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typedef struct _GstOsxAudioElementClass GstOsxAudioElementClass;
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/* This is large, but best (maybe it should be even larger).
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* CoreAudio supposedly has an internal latency in the order of 2ms */
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#define NUM_BUFS 128
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struct _GstOsxAudioElement
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{
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/* yes, we're a gstelement too */
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GstElement parent;
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pthread_mutex_t buffer_mutex; /* mutex covering buffer variables */
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AudioDeviceID device_id;
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unsigned char *buffer[NUM_BUFS];
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unsigned int buffer_len;
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unsigned int buf_read;
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unsigned int buf_write;
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unsigned int buf_read_pos;
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unsigned int buf_write_pos;
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int full_buffers;
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int buffered_bytes;
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};
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struct _GstOsxAudioElementClass {
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GstElementClass klass;
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GList *device_combinations;
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};
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GType gst_osxaudioelement_get_type (void);
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int read_buffer(GstOsxAudioElement* osxaudio, unsigned char* data);
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int write_buffer(GstOsxAudioElement* osxaudio, unsigned char* data, int len);
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G_END_DECLS
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#endif /* __GST_OSXAUDIO_ELEMENT_H__ */
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