src/audio/macosx/SDL_coreaudio.c
author Ryan C. Gordon <icculus@icculus.org>
Mon, 11 Jan 2010 07:45:34 +0000
changeset 3637 8a46b3eab813
parent 3636 e474a820daeb
child 3697 f7b03b6838cb
permissions -rw-r--r--
Since we're not using the CoreAudio HAL now, we don't need to use EnableIO. I think that's how it works. Fixes failure to open audio device on Mac OS X.
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Lesser General Public
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    License as published by the Free Software Foundation; either
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    version 2.1 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Lesser General Public License for more details.
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    You should have received a copy of the GNU Lesser General Public
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    License along with this library; if not, write to the Free Software
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    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
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    Sam Lantinga
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    slouken@libsdl.org
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*/
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#include "SDL_config.h"
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#include <CoreAudio/CoreAudio.h>
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#include <CoreServices/CoreServices.h>
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#include <AudioUnit/AudioUnit.h>
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#if MAC_OS_X_VERSION_MAX_ALLOWED <= 1050
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#include <AudioUnit/AUNTComponent.h>
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#endif
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#include "SDL_audio.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_sysaudio.h"
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#include "SDL_coreaudio.h"
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#define DEBUG_COREAUDIO 0
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typedef struct COREAUDIO_DeviceList
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{
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    AudioDeviceID id;
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    const char *name;
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} COREAUDIO_DeviceList;
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static COREAUDIO_DeviceList *inputDevices = NULL;
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static int inputDeviceCount = 0;
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static COREAUDIO_DeviceList *outputDevices = NULL;
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static int outputDeviceCount = 0;
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static void
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free_device_list(COREAUDIO_DeviceList ** devices, int *devCount)
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{
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    if (*devices) {
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        int i = *devCount;
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        while (i--)
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            SDL_free((void *) (*devices)[i].name);
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        SDL_free(*devices);
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        *devices = NULL;
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    }
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    *devCount = 0;
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}
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static void
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build_device_list(int iscapture, COREAUDIO_DeviceList ** devices,
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                  int *devCount)
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{
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    Boolean outWritable = 0;
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    OSStatus result = noErr;
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    UInt32 size = 0;
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    AudioDeviceID *devs = NULL;
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    UInt32 i = 0;
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    UInt32 max = 0;
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    free_device_list(devices, devCount);
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    result = AudioHardwareGetPropertyInfo(kAudioHardwarePropertyDevices,
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                                          &size, &outWritable);
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    if (result != kAudioHardwareNoError)
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        return;
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    devs = (AudioDeviceID *) alloca(size);
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    if (devs == NULL)
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        return;
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    max = size / sizeof(AudioDeviceID);
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    *devices = (COREAUDIO_DeviceList *) SDL_malloc(max * sizeof(**devices));
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    if (*devices == NULL)
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        return;
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    result = AudioHardwareGetProperty(kAudioHardwarePropertyDevices,
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                                      &size, devs);
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    if (result != kAudioHardwareNoError)
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        return;
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    for (i = 0; i < max; i++) {
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        CFStringRef cfstr = NULL;
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        char *ptr = NULL;
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        AudioDeviceID dev = devs[i];
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        AudioBufferList *buflist = NULL;
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        int usable = 0;
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        CFIndex len = 0;
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        result = AudioDeviceGetPropertyInfo(dev, 0, iscapture,
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                                            kAudioDevicePropertyStreamConfiguration,
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                                            &size, &outWritable);
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        if (result != noErr)
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            continue;
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        buflist = (AudioBufferList *) SDL_malloc(size);
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        if (buflist == NULL)
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            continue;
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        result = AudioDeviceGetProperty(dev, 0, iscapture,
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                                        kAudioDevicePropertyStreamConfiguration,
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                                        &size, buflist);
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        if (result == noErr) {
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            UInt32 j;
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            for (j = 0; j < buflist->mNumberBuffers; j++) {
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                if (buflist->mBuffers[j].mNumberChannels > 0) {
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                    usable = 1;
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                    break;
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   124
                }
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   125
            }
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        }
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        SDL_free(buflist);
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   129
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        if (!usable)
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            continue;
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        size = sizeof(CFStringRef);
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        result = AudioDeviceGetProperty(dev, 0, iscapture,
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                                        kAudioDevicePropertyDeviceNameCFString,
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                                        &size, &cfstr);
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   137
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        if (result != kAudioHardwareNoError)
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            continue;
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        len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
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                                                kCFStringEncodingUTF8);
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   143
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        ptr = (char *) SDL_malloc(len + 1);
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        usable = ((ptr != NULL) &&
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                  (CFStringGetCString
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                   (cfstr, ptr, len + 1, kCFStringEncodingUTF8)));
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        CFRelease(cfstr);
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        if (usable) {
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            len = strlen(ptr);
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            /* Some devices have whitespace at the end...trim it. */
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            while ((len > 0) && (ptr[len - 1] == ' ')) {
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                len--;
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            }
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            usable = (len > 0);
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   158
        }
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        if (!usable) {
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            SDL_free(ptr);
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        } else {
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            ptr[len] = '\0';
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#if DEBUG_COREAUDIO
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            printf("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n",
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                   ((iscapture) ? "capture" : "output"),
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                   (int) *devCount, ptr, (int) dev);
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#endif
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            (*devices)[*devCount].id = dev;
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            (*devices)[*devCount].name = ptr;
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            (*devCount)++;
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   174
        }
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    }
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}
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static inline void
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build_device_lists(void)
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{
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    build_device_list(0, &outputDevices, &outputDeviceCount);
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    build_device_list(1, &inputDevices, &inputDeviceCount);
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}
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static inline void
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free_device_lists(void)
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{
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   189
    free_device_list(&outputDevices, &outputDeviceCount);
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    free_device_list(&inputDevices, &inputDeviceCount);
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   191
}
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static int
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find_device_id(const char *devname, int iscapture, AudioDeviceID * id)
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{
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   197
    int i = ((iscapture) ? inputDeviceCount : outputDeviceCount);
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   198
    COREAUDIO_DeviceList *devs = ((iscapture) ? inputDevices : outputDevices);
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   199
    while (i--) {
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   200
        if (SDL_strcmp(devname, devs->name) == 0) {
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   201
            *id = devs->id;
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   202
            return 1;
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   203
        }
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   204
        devs++;
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   205
    }
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   206
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   207
    return 0;
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   208
}
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static int
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   212
COREAUDIO_DetectDevices(int iscapture)
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{
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   214
    if (iscapture) {
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   215
        build_device_list(1, &inputDevices, &inputDeviceCount);
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   216
        return inputDeviceCount;
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   217
    } else {
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   218
        build_device_list(0, &outputDevices, &outputDeviceCount);
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   219
        return outputDeviceCount;
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   220
    }
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   221
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    return 0;                   /* shouldn't ever hit this. */
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   223
}
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static const char *
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   227
COREAUDIO_GetDeviceName(int index, int iscapture)
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{
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   229
    if ((iscapture) && (index < inputDeviceCount)) {
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   230
        return inputDevices[index].name;
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   231
    } else if ((!iscapture) && (index < outputDeviceCount)) {
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        return outputDevices[index].name;
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    }
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    SDL_SetError("No such device");
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    return NULL;
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}
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static void
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COREAUDIO_Deinitialize(void)
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{
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    free_device_lists();
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}
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/* The CoreAudio callback */
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static OSStatus
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outputCallback(void *inRefCon,
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               AudioUnitRenderActionFlags * ioActionFlags,
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               const AudioTimeStamp * inTimeStamp,
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               UInt32 inBusNumber, UInt32 inNumberFrames,
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               AudioBufferList * ioData)
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{
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    SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
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    AudioBuffer *abuf;
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    UInt32 remaining, len;
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    void *ptr;
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    UInt32 i;
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    /* Only do anything if audio is enabled and not paused */
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    if (!this->enabled || this->paused) {
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        for (i = 0; i < ioData->mNumberBuffers; i++) {
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            abuf = &ioData->mBuffers[i];
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            SDL_memset(abuf->mData, this->spec.silence, abuf->mDataByteSize);
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        }
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        return 0;
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    }
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    /* No SDL conversion should be needed here, ever, since we accept
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       any input format in OpenAudio, and leave the conversion to CoreAudio.
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     */
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    /*
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       assert(!this->convert.needed);
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       assert(this->spec.channels == ioData->mNumberChannels);
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     */
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    for (i = 0; i < ioData->mNumberBuffers; i++) {
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        abuf = &ioData->mBuffers[i];
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        remaining = abuf->mDataByteSize;
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        ptr = abuf->mData;
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        while (remaining > 0) {
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            if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
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                /* Generate the data */
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                SDL_memset(this->hidden->buffer, this->spec.silence,
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                           this->hidden->bufferSize);
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                SDL_mutexP(this->mixer_lock);
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                (*this->spec.callback)(this->spec.userdata,
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                            this->hidden->buffer, this->hidden->bufferSize);
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                SDL_mutexV(this->mixer_lock);
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                this->hidden->bufferOffset = 0;
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            }
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            len = this->hidden->bufferSize - this->hidden->bufferOffset;
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            if (len > remaining)
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                len = remaining;
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            SDL_memcpy(ptr, (char *)this->hidden->buffer +
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                       this->hidden->bufferOffset, len);
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            ptr = (char *)ptr + len;
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            remaining -= len;
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            this->hidden->bufferOffset += len;
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        }
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    }
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    return 0;
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}
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static OSStatus
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inputCallback(void *inRefCon,
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              AudioUnitRenderActionFlags * ioActionFlags,
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              const AudioTimeStamp * inTimeStamp,
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              UInt32 inBusNumber, UInt32 inNumberFrames,
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              AudioBufferList * ioData)
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{
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    //err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer);
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    // !!! FIXME: write me!
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    return noErr;
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}
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static void
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COREAUDIO_CloseDevice(_THIS)
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{
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    if (this->hidden != NULL) {
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        if (this->hidden->audioUnitOpened) {
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            OSStatus result = noErr;
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            AURenderCallbackStruct callback;
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            const AudioUnitElement output_bus = 0;
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            const AudioUnitElement input_bus = 1;
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            const int iscapture = this->iscapture;
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            const AudioUnitElement bus =
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                ((iscapture) ? input_bus : output_bus);
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            const AudioUnitScope scope =
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                ((iscapture) ? kAudioUnitScope_Output :
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                 kAudioUnitScope_Input);
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            /* stop processing the audio unit */
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            result = AudioOutputUnitStop(this->hidden->audioUnit);
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            /* Remove the input callback */
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            SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
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            result = AudioUnitSetProperty(this->hidden->audioUnit,
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                                          kAudioUnitProperty_SetRenderCallback,
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                                          scope, bus, &callback,
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                                          sizeof(callback));
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            CloseComponent(this->hidden->audioUnit);
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            this->hidden->audioUnitOpened = 0;
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        }
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        SDL_free(this->hidden->buffer);
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   351
        SDL_free(this->hidden);
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   352
        this->hidden = NULL;
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   353
    }
2049
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   354
}
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   355
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   356
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   357
#define CHECK_RESULT(msg) \
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   358
    if (result != noErr) { \
2049
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   359
        COREAUDIO_CloseDevice(this); \
2017
df06e6eb65c6 Fixed macosx audio initialization (passed wrong struct to CoreAudio).
Ryan C. Gordon <icculus@icculus.org>
parents: 2016
diff changeset
   360
        SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   361
        return 0; \
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diff changeset
   362
    }
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diff changeset
   363
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   364
static int
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diff changeset
   365
find_device_by_name(_THIS, const char *devname, int iscapture)
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   366
{
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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   367
    AudioDeviceID devid = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   368
    OSStatus result = noErr;
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diff changeset
   369
    UInt32 size = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   370
    UInt32 alive = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   371
    pid_t pid = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   372
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   373
    if (devname == NULL) {
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   374
        size = sizeof(AudioDeviceID);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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   375
        const AudioHardwarePropertyID propid =
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   376
            ((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
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   377
             kAudioHardwarePropertyDefaultOutputDevice);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   378
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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   379
        result = AudioHardwareGetProperty(propid, &size, &devid);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   380
        CHECK_RESULT("AudioHardwareGetProperty (default device)");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   381
    } else {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   382
        if (!find_device_id(devname, iscapture, &devid)) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   383
            SDL_SetError("CoreAudio: No such audio device.");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   384
            return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   385
        }
935
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diff changeset
   386
    }
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
   387
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diff changeset
   388
    size = sizeof(alive);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   389
    result = AudioDeviceGetProperty(devid, 0, iscapture,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   390
                                    kAudioDevicePropertyDeviceIsAlive,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   391
                                    &size, &alive);
2060
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diff changeset
   392
    CHECK_RESULT
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diff changeset
   393
        ("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
935
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diff changeset
   394
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   395
    if (!alive) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   396
        SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   397
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   398
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   399
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diff changeset
   400
    size = sizeof(pid);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   401
    result = AudioDeviceGetProperty(devid, 0, iscapture,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   402
                                    kAudioDevicePropertyHogMode, &size, &pid);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
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diff changeset
   403
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   404
    /* some devices don't support this property, so errors are fine here. */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   405
    if ((result == noErr) && (pid != -1)) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   406
        SDL_SetError("CoreAudio: requested device is being hogged.");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   407
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   408
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   409
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   410
    this->hidden->deviceID = devid;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   411
    return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   412
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   413
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   414
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   415
static int
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   416
prepare_audiounit(_THIS, const char *devname, int iscapture,
2060
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diff changeset
   417
                  const AudioStreamBasicDescription * strdesc)
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
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parents:
diff changeset
   418
{
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   419
    OSStatus result = noErr;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   420
    AURenderCallbackStruct callback;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   421
    ComponentDescription desc;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   422
    Component comp = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   423
    const AudioUnitElement output_bus = 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   424
    const AudioUnitElement input_bus = 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   425
    const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   426
    const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
2060
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parents: 2057
diff changeset
   427
                                  kAudioUnitScope_Input);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   428
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   429
    if (!find_device_by_name(this, devname, iscapture)) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   430
        SDL_SetError("Couldn't find requested CoreAudio device");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   431
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   432
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   433
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   434
    SDL_memset(&desc, '\0', sizeof(ComponentDescription));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   435
    desc.componentType = kAudioUnitType_Output;
3617
023aa9699baa Merged r4713:4714 from branches/SDL-1.2: CoreAudio 64-bit & Snow Leopard fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3242
diff changeset
   436
    desc.componentSubType = kAudioUnitSubType_DefaultOutput;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   437
    desc.componentManufacturer = kAudioUnitManufacturer_Apple;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   438
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   439
    comp = FindNextComponent(NULL, &desc);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   440
    if (comp == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   441
        SDL_SetError("Couldn't find requested CoreAudio component");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   442
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   443
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   444
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   445
    /* Open & initialize the audio unit */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 2043
diff changeset
   446
    result = OpenAComponent(comp, &this->hidden->audioUnit);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   447
    CHECK_RESULT("OpenAComponent");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   448
2055
72cc2226d6a3 Fix potential memory leaks if CoreAudio initialization fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 2049
diff changeset
   449
    this->hidden->audioUnitOpened = 1;
72cc2226d6a3 Fix potential memory leaks if CoreAudio initialization fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 2049
diff changeset
   450
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   451
    result = AudioUnitSetProperty(this->hidden->audioUnit,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   452
                                  kAudioOutputUnitProperty_CurrentDevice,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   453
                                  kAudioUnitScope_Global, 0,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   454
                                  &this->hidden->deviceID,
2060
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diff changeset
   455
                                  sizeof(AudioDeviceID));
866052b01ee5 indent is evil
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parents: 2057
diff changeset
   456
    CHECK_RESULT
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   457
        ("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   458
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   459
    /* Set the data format of the audio unit. */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   460
    result = AudioUnitSetProperty(this->hidden->audioUnit,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   461
                                  kAudioUnitProperty_StreamFormat,
2060
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diff changeset
   462
                                  scope, bus, strdesc, sizeof(*strdesc));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   463
    CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   464
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   465
    /* Set the audio callback */
2060
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parents: 2057
diff changeset
   466
    SDL_memset(&callback, '\0', sizeof(AURenderCallbackStruct));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   467
    callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   468
    callback.inputProcRefCon = this;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   469
    result = AudioUnitSetProperty(this->hidden->audioUnit,
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   470
                                  kAudioUnitProperty_SetRenderCallback,
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   471
                                  scope, bus, &callback, sizeof(callback));
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   472
    CHECK_RESULT
3617
023aa9699baa Merged r4713:4714 from branches/SDL-1.2: CoreAudio 64-bit & Snow Leopard fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 3242
diff changeset
   473
        ("AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   474
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   475
    /* Calculate the final parameters for this audio specification */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   476
    SDL_CalculateAudioSpec(&this->spec);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   477
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   478
    /* Allocate a sample buffer */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   479
    this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   480
    this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   481
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   482
    result = AudioUnitInitialize(this->hidden->audioUnit);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   483
    CHECK_RESULT("AudioUnitInitialize");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   484
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   485
    /* Finally, start processing of the audio unit */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   486
    result = AudioOutputUnitStart(this->hidden->audioUnit);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   487
    CHECK_RESULT("AudioOutputUnitStart");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   488
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   489
    /* We're running! */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   490
    return 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   491
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   492
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   493
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   494
static int
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   495
COREAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   496
{
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   497
    AudioStreamBasicDescription strdesc;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   498
    SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   499
    int valid_datatype = 0;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   500
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   501
    /* Initialize all variables that we clean on shutdown */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   502
    this->hidden = (struct SDL_PrivateAudioData *)
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   503
        SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   504
    if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   505
        SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   506
        return (0);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   507
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   508
    SDL_memset(this->hidden, 0, (sizeof *this->hidden));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   509
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   510
    /* Setup a AudioStreamBasicDescription with the requested format */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   511
    SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   512
    strdesc.mFormatID = kAudioFormatLinearPCM;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   513
    strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   514
    strdesc.mChannelsPerFrame = this->spec.channels;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   515
    strdesc.mSampleRate = this->spec.freq;
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   516
    strdesc.mFramesPerPacket = 1;
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
   517
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   518
    while ((!valid_datatype) && (test_format)) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   519
        this->spec.format = test_format;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   520
        /* Just a list of valid SDL formats, so people don't pass junk here. */
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   521
        switch (test_format) {
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   522
        case AUDIO_U8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   523
        case AUDIO_S8:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   524
        case AUDIO_U16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   525
        case AUDIO_S16LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   526
        case AUDIO_U16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   527
        case AUDIO_S16MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   528
        case AUDIO_S32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   529
        case AUDIO_S32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   530
        case AUDIO_F32LSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   531
        case AUDIO_F32MSB:
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   532
            valid_datatype = 1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   533
            strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   534
            if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   535
                strdesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   536
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   537
            if (SDL_AUDIO_ISFLOAT(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   538
                strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   539
            else if (SDL_AUDIO_ISSIGNED(this->spec.format))
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   540
                strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   541
            break;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   542
        }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   543
    }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   544
2043
adf732f1f016 Formatting update
Sam Lantinga <slouken@libsdl.org>
parents: 2017
diff changeset
   545
    if (!valid_datatype) {      /* shouldn't happen, but just in case... */
2055
72cc2226d6a3 Fix potential memory leaks if CoreAudio initialization fails.
Ryan C. Gordon <icculus@icculus.org>
parents: 2049
diff changeset
   546
        COREAUDIO_CloseDevice(this);
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   547
        SDL_SetError("Unsupported audio format");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   548
        return 0;
2003
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   549
    }
506851d3efa4 Mac OS X audio backend now supports int32/float32.
Ryan C. Gordon <icculus@icculus.org>
parents: 1895
diff changeset
   550
2016
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   551
    strdesc.mBytesPerFrame =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   552
        strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   553
    strdesc.mBytesPerPacket =
72fa74928062 Compile fixes.
Ryan C. Gordon <icculus@icculus.org>
parents: 2003
diff changeset
   554
        strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   555
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   556
    if (!prepare_audiounit(this, devname, iscapture, &strdesc)) {
2057
c2fed8bb6700 Oh for crying out loud...
Ryan C. Gordon <icculus@icculus.org>
parents: 2055
diff changeset
   557
        COREAUDIO_CloseDevice(this);
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   558
        return 0;               /* prepare_audiounit() will call SDL_SetError()... */
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   559
    }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
   560
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   561
    return 1;                   /* good to go. */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
   562
}
935
f8d5ddc7aef1 Audio improvements from Max Horn, including a new CoreAudio driver for MacOSX
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   563
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   564
static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   565
COREAUDIO_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   566
{
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   567
    /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   568
    impl->DetectDevices = COREAUDIO_DetectDevices;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   569
    impl->GetDeviceName = COREAUDIO_GetDeviceName;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   570
    impl->OpenDevice = COREAUDIO_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   571
    impl->CloseDevice = COREAUDIO_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   572
    impl->Deinitialize = COREAUDIO_Deinitialize;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   573
    impl->ProvidesOwnCallbackThread = 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   574
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2057
diff changeset
   575
    build_device_lists();       /* do an initial check for devices... */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   576
2938
2929ed239d2a Adjusted default choice of audio driver.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
diff changeset
   577
    return (outputDeviceCount > 0) ? 2 : 1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   578
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   579
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   580
AudioBootStrap COREAUDIO_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   581
    "coreaudio", "Mac OS X CoreAudio", COREAUDIO_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   582
};
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 2043
diff changeset
   583
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1487
diff changeset
   584
/* vi: set ts=4 sw=4 expandtab: */