diff options
author | Vito Caputo <vcaputo@pengaru.com> | 2017-05-26 21:51:04 -0700 |
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committer | Vito Caputo <vcaputo@pengaru.com> | 2017-05-26 22:48:09 -0700 |
commit | 78f8fce7f286fd0c71774e2567404ed51f24fef3 (patch) | |
tree | f3de4987f7a9fc1bc03331e97b65a851b041051a /src/sys/macosx/volume-macosx.c |
*: initial commit of stripped schism stuff
Forking schism tracker's IT playback stuff into a little playback
library for embedding in demos.
Diffstat (limited to 'src/sys/macosx/volume-macosx.c')
-rw-r--r-- | src/sys/macosx/volume-macosx.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/src/sys/macosx/volume-macosx.c b/src/sys/macosx/volume-macosx.c new file mode 100644 index 0000000..d07d947 --- /dev/null +++ b/src/sys/macosx/volume-macosx.c @@ -0,0 +1,119 @@ +/* + * Schism Tracker - a cross-platform Impulse Tracker clone + * copyright (c) 2003-2005 Storlek <storlek@rigelseven.com> + * copyright (c) 2005-2008 Mrs. Brisby <mrs.brisby@nimh.org> + * copyright (c) 2009 Storlek & Mrs. Brisby + * copyright (c) 2010-2012 Storlek + * URL: http://schismtracker.org/ + * + * 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 "headers.h" + +#include "util.h" + +#ifdef MACOSX + +#include <CoreServices/CoreServices.h> +#include <CoreAudio/AudioHardware.h> + +int macosx_volume_get_max(void); +int macosx_volume_get_max(void) +{ + return 65535; +} + +void macosx_volume_read(int *left, int *right); +void macosx_volume_read(int *left, int *right) +{ + UInt32 size; + AudioDeviceID od; + OSStatus e; + UInt32 ch[2]; + Float32 fl[2]; + int i; + + if (left) *left = 0; + if (right) *right = 0; + + size=sizeof(od); + e = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, + &size, &od); + if (e != 0) return; + + size=sizeof(ch); + e = AudioDeviceGetProperty(od, + 0, /* QA1016 says "0" is master channel */ + false, + kAudioDevicePropertyPreferredChannelsForStereo, + &size, + &ch); + if (e != 0) return; + + for (i = 0; i < 2; i++) { + size = sizeof(Float32); + e = AudioDeviceGetProperty(od, /* device */ + ch[i], /* preferred stereo channel */ + false, /* output device */ + kAudioDevicePropertyVolumeScalar, + &size, + &fl[i]); + if (e != 0) return; + } + if (left) *left = fl[0] * 65536.0f; + if (right) *right = fl[1] * 65536.0f; +} + +void macosx_volume_write(int left, int right); +void macosx_volume_write(int left, int right) +{ + UInt32 size; + AudioDeviceID od; + OSStatus e; + UInt32 ch[2]; + Float32 fl[2]; + int i; + + size=sizeof(od); + e = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, + &size, &od); + if (e != 0) return; + + size=sizeof(ch); + e = AudioDeviceGetProperty(od, + 0, /* QA1016 says "0" is master channel */ + false, + kAudioDevicePropertyPreferredChannelsForStereo, + &size, + &ch); + if (e != 0) return; + + fl[0] = ((float)left) / 65536.0f; + fl[1] = ((float)right) / 65536.0f; + + for (i = 0; i < 2; i++) { + e = AudioDeviceSetProperty(od, /* device */ + NULL, /* no timestamp */ + ch[i], /* preferred stereo channel */ + false, /* output device */ + kAudioDevicePropertyVolumeScalar, + sizeof(Float32), + &fl[i]); + if (e != 0) return; + } +} + +#endif |