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 (18 years, 4 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!)
#	User	Rev	Content
1	nigel	1.1	/*
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			}