src/MacOSX/AudioDevice.cpp

/*      Copyright:      Š Copyright 2004 Apple Computer, Inc. All rights reserved.

        Disclaimer:     IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.
                        ("Apple") in consideration of your agreement to the following terms, and your
                        use, installation, modification or redistribution of this Apple software
                        constitutes acceptance of these terms.  If you do not agree with these terms,
                        please do not use, install, modify or redistribute this Apple software.

                        In consideration of your agreement to abide by the following terms, and subject
                        to these terms, Apple grants you a personal, non-exclusive license, under AppleŐs
                        copyrights in this original Apple software (the "Apple Software"), to use,
                        reproduce, modify and redistribute the Apple Software, with or without
                        modifications, in source and/or binary forms; provided that if you redistribute
                        the Apple Software in its entirety and without modifications, you must retain
                        this notice and the following text and disclaimers in all such redistributions of
                        the Apple Software.  Neither the name, trademarks, service marks or logos of
                        Apple Computer, Inc. may be used to endorse or promote products derived from the
                        Apple Software without specific prior written permission from Apple.  Except as
                        expressly stated in this notice, no other rights or licenses, express or implied,
                        are granted by Apple herein, including but not limited to any patent rights that
                        may be infringed by your derivative works or by other works in which the Apple
                        Software may be incorporated.

                        The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO
                        WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
                        WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                        PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
                        COMBINATION WITH YOUR PRODUCTS.

                        IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
                        CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
                        GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                        ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
                        OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
                        (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
                        ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*=============================================================================
        AudioDevice.cpp
        
=============================================================================*/

#include "AudioDevice.h"

void    AudioDevice::Init(AudioDeviceID devid, bool isInput)
{
        mID = devid;
        mIsInput = isInput;
        if (mID == kAudioDeviceUnknown) return;
        
        UInt32 propsize;
        
        propsize = sizeof(UInt32);
        verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertySafetyOffset, &propsize, &mSafetyOffset));
        
        propsize = sizeof(UInt32);
        verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, &propsize, &mBufferSizeFrames));
        
        propsize = sizeof(AudioStreamBasicDescription);
        verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyStreamFormat, &propsize, &mFormat));

}

void    AudioDevice::SetBufferSize(UInt32 size)
{
        UInt32 propsize = sizeof(UInt32);
        verify_noerr(AudioDeviceSetProperty(mID, NULL, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, propsize, &size));

        propsize = sizeof(UInt32);
        verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, &propsize, &mBufferSizeFrames));
}

int             AudioDevice::CountChannels()
{
        OSStatus err;
        UInt32 propSize;
        int result = 0;
        
        err = AudioDeviceGetPropertyInfo(mID, 0, mIsInput, kAudioDevicePropertyStreamConfiguration, &propSize, NULL);
        if (err) return 0;

        AudioBufferList *buflist = (AudioBufferList *)malloc(propSize);
        err = AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyStreamConfiguration, &propSize, buflist);
        if (!err) {
                for (UInt32 i = 0; i < buflist->mNumberBuffers; ++i) {
                        result += buflist->mBuffers[i].mNumberChannels;
                }
        }
        free(buflist);
        return result;
}

char *  AudioDevice::GetName(char *buf, UInt32 maxlen)
{
        verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyDeviceName, &maxlen, buf));
        return buf;
}
Revision:	1.1
Committed:	2006-07-28T13:15:18Z (18 years, 3 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	/* Copyright: Š Copyright 2004 Apple Computer, Inc. All rights reserved.
2
3			Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
4			("Apple") in consideration of your agreement to the following terms, and your
5			use, installation, modification or redistribution of this Apple software
6			constitutes acceptance of these terms. If you do not agree with these terms,
7			please do not use, install, modify or redistribute this Apple software.
8
9			In consideration of your agreement to abide by the following terms, and subject
10			to these terms, Apple grants you a personal, non-exclusive license, under AppleŐs
11			copyrights in this original Apple software (the "Apple Software"), to use,
12			reproduce, modify and redistribute the Apple Software, with or without
13			modifications, in source and/or binary forms; provided that if you redistribute
14			the Apple Software in its entirety and without modifications, you must retain
15			this notice and the following text and disclaimers in all such redistributions of
16			the Apple Software. Neither the name, trademarks, service marks or logos of
17			Apple Computer, Inc. may be used to endorse or promote products derived from the
18			Apple Software without specific prior written permission from Apple. Except as
19			expressly stated in this notice, no other rights or licenses, express or implied,
20			are granted by Apple herein, including but not limited to any patent rights that
21			may be infringed by your derivative works or by other works in which the Apple
22			Software may be incorporated.
23
24			The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
25			WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
26			WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
27			PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
28			COMBINATION WITH YOUR PRODUCTS.
29
30			IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
31			CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
32			GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
33			ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
34			OF THE APPLE SOFTWARE, HOWEVER CAUSED AND WHETHER UNDER THEORY OF CONTRACT, TORT
35			(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
36			ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
37			*/
38			/*=============================================================================
39			AudioDevice.cpp
40
41			=============================================================================*/
42
43			#include "AudioDevice.h"
44
45			void AudioDevice::Init(AudioDeviceID devid, bool isInput)
46			{
47			mID = devid;
48			mIsInput = isInput;
49			if (mID == kAudioDeviceUnknown) return;
50
51			UInt32 propsize;
52
53			propsize = sizeof(UInt32);
54			verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertySafetyOffset, &propsize, &mSafetyOffset));
55
56			propsize = sizeof(UInt32);
57			verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, &propsize, &mBufferSizeFrames));
58
59			propsize = sizeof(AudioStreamBasicDescription);
60			verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyStreamFormat, &propsize, &mFormat));
61
62			}
63
64			void AudioDevice::SetBufferSize(UInt32 size)
65			{
66			UInt32 propsize = sizeof(UInt32);
67			verify_noerr(AudioDeviceSetProperty(mID, NULL, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, propsize, &size));
68
69			propsize = sizeof(UInt32);
70			verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyBufferFrameSize, &propsize, &mBufferSizeFrames));
71			}
72
73			int AudioDevice::CountChannels()
74			{
75			OSStatus err;
76			UInt32 propSize;
77			int result = 0;
78
79			err = AudioDeviceGetPropertyInfo(mID, 0, mIsInput, kAudioDevicePropertyStreamConfiguration, &propSize, NULL);
80			if (err) return 0;
81
82			AudioBufferList buflist = (AudioBufferList )malloc(propSize);
83			err = AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyStreamConfiguration, &propSize, buflist);
84			if (!err) {
85			for (UInt32 i = 0; i < buflist->mNumberBuffers; ++i) {
86			result += buflist->mBuffers[i].mNumberChannels;
87			}
88			}
89			free(buflist);
90			return result;
91			}
92
93			char * AudioDevice::GetName(char *buf, UInt32 maxlen)
94			{
95			verify_noerr(AudioDeviceGetProperty(mID, 0, mIsInput, kAudioDevicePropertyDeviceName, &maxlen, buf));
96			return buf;
97			}