| 1 | /* |
| 2 | * This file is part of DisOrder |
| 3 | * Copyright (C) 2009 Richard Kettlewell |
| 4 | * |
| 5 | * This program is free software: you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation, either version 3 of the License, or |
| 8 | * (at your option) any later version. |
| 9 | * |
| 10 | * This program is distributed in the hope that it will be useful, |
| 11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | * GNU General Public License for more details. |
| 14 | * |
| 15 | * You should have received a copy of the GNU General Public License |
| 16 | * along with this program. If not, see <http://www.gnu.org/licenses/>. |
| 17 | */ |
| 18 | /** @file lib/coreaudio.c |
| 19 | * @brief Support for @ref BACKEND_COREAUDIO |
| 20 | */ |
| 21 | |
| 22 | #include "common.h" |
| 23 | |
| 24 | #if HAVE_COREAUDIO_AUDIOHARDWARE_H |
| 25 | |
| 26 | #include "coreaudio.h" |
| 27 | #include "log.h" |
| 28 | #include <CoreFoundation/CFString.h> |
| 29 | |
| 30 | /** @brief Return the default device ID */ |
| 31 | static AudioDeviceID coreaudio_use_default(void) { |
| 32 | OSStatus status; |
| 33 | UInt32 propertySize; |
| 34 | AudioDeviceID adid; |
| 35 | |
| 36 | /* TODO should we use kAudioHardwarePropertyDefaultSystemOutputDevice |
| 37 | * instead? It is listed in the enumeration but is not documented, so we |
| 38 | * leave it alone until better information is available. */ |
| 39 | propertySize = sizeof adid; |
| 40 | status = AudioHardwareGetProperty(kAudioHardwarePropertyDefaultOutputDevice, |
| 41 | &propertySize, &adid); |
| 42 | if(status) |
| 43 | fatal(0, "AudioHardwareGetProperty kAudioHardwarePropertyDefaultOutputDevice: %d", (int)status); |
| 44 | if(adid == kAudioDeviceUnknown) |
| 45 | fatal(0, "no output device"); |
| 46 | return adid; |
| 47 | } |
| 48 | |
| 49 | /** @brief Find a device by some string |
| 50 | * @param selector Selector for property to look for |
| 51 | * @param description Property description |
| 52 | * @param devs List of device IDs |
| 53 | * @param ndevs Number of device IDs in @p devs |
| 54 | * @param resultp Where to put device ID |
| 55 | * @return 1 if found, 0 if not found |
| 56 | */ |
| 57 | static int coreaudio_find_device(AudioObjectPropertySelector selector, |
| 58 | //const char *description, |
| 59 | const AudioDeviceID *devs, |
| 60 | unsigned ndevs, |
| 61 | CFStringRef dev, |
| 62 | AudioDeviceID *resultp) { |
| 63 | OSStatus status; |
| 64 | UInt32 propertySize; |
| 65 | |
| 66 | for(unsigned n = 0; n < ndevs; ++n) { |
| 67 | CFStringRef name; |
| 68 | propertySize = sizeof name; |
| 69 | status = AudioDeviceGetProperty(devs[n], 0, FALSE, |
| 70 | selector, |
| 71 | &propertySize, &name); |
| 72 | if(status) |
| 73 | fatal(0, "AudioDeviceGetProperty: %d", (int)status); |
| 74 | #if 0 |
| 75 | UInt8 output[1024]; |
| 76 | CFIndex used; |
| 77 | CFRange r = { 0, CFStringGetLength(name) }; |
| 78 | CFStringGetBytes(name, r, kCFStringEncodingUTF8, |
| 79 | '?', FALSE, output, sizeof output, |
| 80 | &used); |
| 81 | output[used] = 0; |
| 82 | info("device %u %s: %s", n, description, (char *)output); |
| 83 | #endif |
| 84 | if(CFStringCompare(dev, name, |
| 85 | kCFCompareCaseInsensitive|kCFCompareNonliteral) |
| 86 | == kCFCompareEqualTo) { |
| 87 | *resultp = devs[n]; |
| 88 | CFRelease(name); |
| 89 | return 1; |
| 90 | } |
| 91 | CFRelease(name); |
| 92 | } |
| 93 | return 0; /* didn't find it */ |
| 94 | } |
| 95 | |
| 96 | /** @brief Identify audio device |
| 97 | * @param name Device name |
| 98 | * @return Device ID |
| 99 | */ |
| 100 | AudioDeviceID coreaudio_getdevice(const char *name) { |
| 101 | OSStatus status; |
| 102 | UInt32 propertySize; |
| 103 | int found; |
| 104 | AudioDeviceID adid; |
| 105 | |
| 106 | if(!name |
| 107 | || !*name |
| 108 | || !strcmp(name, "default")) |
| 109 | return coreaudio_use_default(); |
| 110 | /* Convert the configured device name to a CFString */ |
| 111 | CFStringRef dev; |
| 112 | dev = CFStringCreateWithCString(NULL/*default allocator*/, |
| 113 | name, |
| 114 | kCFStringEncodingUTF8); |
| 115 | if(!dev) |
| 116 | fatal(0, "CFStringCreateWithBytes failed"); |
| 117 | /* Get a list of available devices */ |
| 118 | AudioDeviceID devs[1024]; |
| 119 | unsigned ndevs; |
| 120 | |
| 121 | propertySize = sizeof devs; |
| 122 | status = AudioHardwareGetProperty(kAudioHardwarePropertyDevices, |
| 123 | &propertySize, devs); |
| 124 | if(status) |
| 125 | fatal(0, "AudioHardwareGetProperty kAudioHardwarePropertyDevices: %d", |
| 126 | (int)status); |
| 127 | ndevs = propertySize / sizeof *devs; |
| 128 | if(!ndevs) |
| 129 | fatal(0, "no sound devices found"); |
| 130 | /* Try looking up by UID first */ |
| 131 | found = coreaudio_find_device(kAudioDevicePropertyDeviceUID, //"UID", |
| 132 | devs, ndevs, dev, &adid); |
| 133 | /* Failing that try looking up by name */ |
| 134 | if(!found) |
| 135 | found = coreaudio_find_device(kAudioObjectPropertyName, //"name", |
| 136 | devs, ndevs, dev, &adid); |
| 137 | CFRelease(dev); |
| 138 | if(!found) |
| 139 | fatal(0, "cannot find device '%s'", name); |
| 140 | return adid; |
| 141 | } |
| 142 | |
| 143 | #endif |
| 144 | |
| 145 | /* |
| 146 | Local Variables: |
| 147 | c-basic-offset:2 |
| 148 | comment-column:40 |
| 149 | fill-column:79 |
| 150 | indent-tabs-mode:nil |
| 151 | End: |
| 152 | */ |