src/MacOSX/MacOSX_sound_if.cpp

/*
 *  MacOSX_sound_if.h
 *  BasiliskII
 *
 *  Copyright 2006 Daniel Sumorok. All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program 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 General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
#include "AudioBackEnd.h"
#include "MacOSX_sound_if.h"

OSXsoundOutput::OSXsoundOutput() :
  player(NULL),
  callback(NULL) {
}

void OSXsoundOutput::getMoreSamples(void *arg) {
  OSXsoundOutput *me;
        
  me = (OSXsoundOutput *)arg;
        
  if(me == NULL) {
    return;
  }
        
  if(me->callback == NULL) {
    return;
  }
        
  me->callback();
}

int OSXsoundOutput::start(int bitsPerSample, int numChannels, int sampleRate) {
  stop();
  player = new AudioBackEnd(bitsPerSample, numChannels, sampleRate);
  if(player != NULL) {
    player->setCallback(getMoreSamples, (void *)this);
    player->Start();
  }
  return 0;
}

int OSXsoundOutput::stop() {
  if(player != NULL) {
    player->Stop();
    delete player;
    player = NULL;
  }
  return 0;
}

OSXsoundOutput::~OSXsoundOutput() {
  stop();
}

void OSXsoundOutput::setCallback(audioCallback fn) {
  callback = fn;
}

unsigned int OSXsoundOutput::bufferSizeFrames() {
  if(player != NULL) {
    return player->BufferSizeFrames();
  }
        
  return 0;
}

int OSXsoundOutput::sendAudioBuffer(void *buffer, int numFrames) {
  if(player != NULL) {
    return player->sendAudioBuffer(buffer, numFrames);
  }
        
  return 0;
}
Revision:	1.1
Committed:	2006-07-28T13:42:29Z (17 years, 9 months ago) by nigel
Branch:	MAIN
CVS Tags:	nigel-build-19, HEAD
Log Message:	Working audio output by Daniel Sumorok. Not quite the way I wanted to do it but it will do for now. (on a real Mac, the real audio hardware should be able to pull/grab the data from our buffers - an extra thread with its own set of buffers is wasteful!)
#	Content
1	/*
2	* MacOSX_sound_if.h
3	* BasiliskII
4	*
5	* Copyright 2006 Daniel Sumorok. All rights reserved.
6	*
7	* This program is free software; you can redistribute it and/or modify
8	* it under the terms of the GNU General Public License as published by
9	* the Free Software Foundation; either version 2 of the License, or
10	* (at your option) any later version.
11	*
12	* This program is distributed in the hope that it will be useful,
13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15	* GNU General Public License for more details.
16	*
17	* You should have received a copy of the GNU General Public License
18	* along with this program; if not, write to the Free Software
19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
20	*/
21	#include "AudioBackEnd.h"
22	#include "MacOSX_sound_if.h"
23
24	OSXsoundOutput::OSXsoundOutput() :
25	player(NULL),
26	callback(NULL) {
27	}
28
29	void OSXsoundOutput::getMoreSamples(void *arg) {
30	OSXsoundOutput *me;
31
32	me = (OSXsoundOutput *)arg;
33
34	if(me == NULL) {
35	return;
36	}
37
38	if(me->callback == NULL) {
39	return;
40	}
41
42	me->callback();
43	}
44
45	int OSXsoundOutput::start(int bitsPerSample, int numChannels, int sampleRate) {
46	stop();
47	player = new AudioBackEnd(bitsPerSample, numChannels, sampleRate);
48	if(player != NULL) {
49	player->setCallback(getMoreSamples, (void *)this);
50	player->Start();
51	}
52	return 0;
53	}
54
55	int OSXsoundOutput::stop() {
56	if(player != NULL) {
57	player->Stop();
58	delete player;
59	player = NULL;
60	}
61	return 0;
62	}
63
64	OSXsoundOutput::~OSXsoundOutput() {
65	stop();
66	}
67
68	void OSXsoundOutput::setCallback(audioCallback fn) {
69	callback = fn;
70	}
71
72	unsigned int OSXsoundOutput::bufferSizeFrames() {
73	if(player != NULL) {
74	return player->BufferSizeFrames();
75	}
76
77	return 0;
78	}
79
80	int OSXsoundOutput::sendAudioBuffer(void *buffer, int numFrames) {
81	if(player != NULL) {
82	return player->sendAudioBuffer(buffer, numFrames);
83	}
84
85	return 0;
86	}