SDL_coreaudio.c
Go to the documentation of this file.
/*
Simple DirectMedia Layer
Copyright (C) 1997-2016 Sam Lantinga <slouken@libsdl.org>
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source distribution.
*/
#include "../../SDL_internal.h"
#if SDL_AUDIO_DRIVER_COREAUDIO
#include "SDL_audio.h"
#include "../SDL_audio_c.h"
#include "../SDL_sysaudio.h"
#include "SDL_coreaudio.h"
#include "SDL_assert.h"
#define DEBUG_COREAUDIO 0
static void COREAUDIO_CloseDevice(_THIS);
#define CHECK_RESULT(msg) \
if (result != noErr) { \
COREAUDIO_CloseDevice(this); \
SDL_SetError("CoreAudio error (%s): %d", msg, (int) result); \
return 0; \
}
#if MACOSX_COREAUDIO
static const AudioObjectPropertyAddress devlist_address = {
kAudioHardwarePropertyDevices,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
typedef void (*addDevFn)(const char *name, const int iscapture, AudioDeviceID devId, void *data);
typedef struct AudioDeviceList
{
AudioDeviceID devid;
SDL_bool alive;
struct AudioDeviceList *next;
} AudioDeviceList;
static AudioDeviceList *output_devs = NULL;
static AudioDeviceList *capture_devs = NULL;
static SDL_bool
add_to_internal_dev_list(const int iscapture, AudioDeviceID devId)
{
AudioDeviceList *item = (AudioDeviceList *) SDL_malloc(sizeof (AudioDeviceList));
if (item == NULL) {
return SDL_FALSE;
}
item->devid = devId;
item->alive = SDL_TRUE;
item->next = iscapture ? capture_devs : output_devs;
if (iscapture) {
capture_devs = item;
} else {
output_devs = item;
}
return SDL_TRUE;
}
static void
addToDevList(const char *name, const int iscapture, AudioDeviceID devId, void *data)
{
if (add_to_internal_dev_list(iscapture, devId)) {
SDL_AddAudioDevice(iscapture, name, (void *) ((size_t) devId));
}
}
static void
build_device_list(int iscapture, addDevFn addfn, void *addfndata)
{
OSStatus result = noErr;
UInt32 size = 0;
AudioDeviceID *devs = NULL;
UInt32 i = 0;
UInt32 max = 0;
result = AudioObjectGetPropertyDataSize(kAudioObjectSystemObject,
&devlist_address, 0, NULL, &size);
if (result != kAudioHardwareNoError)
return;
devs = (AudioDeviceID *) alloca(size);
if (devs == NULL)
return;
result = AudioObjectGetPropertyData(kAudioObjectSystemObject,
&devlist_address, 0, NULL, &size, devs);
if (result != kAudioHardwareNoError)
return;
max = size / sizeof (AudioDeviceID);
for (i = 0; i < max; i++) {
CFStringRef cfstr = NULL;
char *ptr = NULL;
AudioDeviceID dev = devs[i];
AudioBufferList *buflist = NULL;
int usable = 0;
CFIndex len = 0;
const AudioObjectPropertyAddress addr = {
kAudioDevicePropertyStreamConfiguration,
iscapture ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
kAudioObjectPropertyElementMaster
};
const AudioObjectPropertyAddress nameaddr = {
kAudioObjectPropertyName,
iscapture ? kAudioDevicePropertyScopeInput : kAudioDevicePropertyScopeOutput,
kAudioObjectPropertyElementMaster
};
result = AudioObjectGetPropertyDataSize(dev, &addr, 0, NULL, &size);
if (result != noErr)
continue;
buflist = (AudioBufferList *) SDL_malloc(size);
if (buflist == NULL)
continue;
result = AudioObjectGetPropertyData(dev, &addr, 0, NULL,
&size, buflist);
if (result == noErr) {
UInt32 j;
for (j = 0; j < buflist->mNumberBuffers; j++) {
if (buflist->mBuffers[j].mNumberChannels > 0) {
usable = 1;
break;
}
}
}
SDL_free(buflist);
if (!usable)
continue;
size = sizeof (CFStringRef);
result = AudioObjectGetPropertyData(dev, &nameaddr, 0, NULL, &size, &cfstr);
if (result != kAudioHardwareNoError)
continue;
len = CFStringGetMaximumSizeForEncoding(CFStringGetLength(cfstr),
kCFStringEncodingUTF8);
ptr = (char *) SDL_malloc(len + 1);
usable = ((ptr != NULL) &&
(CFStringGetCString
(cfstr, ptr, len + 1, kCFStringEncodingUTF8)));
CFRelease(cfstr);
if (usable) {
len = strlen(ptr);
/* Some devices have whitespace at the end...trim it. */
while ((len > 0) && (ptr[len - 1] == ' ')) {
len--;
}
usable = (len > 0);
}
if (usable) {
ptr[len] = '\0';
#if DEBUG_COREAUDIO
printf("COREAUDIO: Found %s device #%d: '%s' (devid %d)\n",
((iscapture) ? "capture" : "output"),
(int) *devCount, ptr, (int) dev);
#endif
addfn(ptr, iscapture, dev, addfndata);
}
SDL_free(ptr); /* addfn() would have copied the string. */
}
}
static void
free_audio_device_list(AudioDeviceList **list)
{
AudioDeviceList *item = *list;
while (item) {
AudioDeviceList *next = item->next;
SDL_free(item);
item = next;
}
*list = NULL;
}
static void
COREAUDIO_DetectDevices(void)
{
build_device_list(SDL_TRUE, addToDevList, NULL);
build_device_list(SDL_FALSE, addToDevList, NULL);
}
static void
build_device_change_list(const char *name, const int iscapture, AudioDeviceID devId, void *data)
{
AudioDeviceList **list = (AudioDeviceList **) data;
AudioDeviceList *item;
for (item = *list; item != NULL; item = item->next) {
if (item->devid == devId) {
item->alive = SDL_TRUE;
return;
}
}
add_to_internal_dev_list(iscapture, devId); /* new device, add it. */
SDL_AddAudioDevice(iscapture, name, (void *) ((size_t) devId));
}
static void
reprocess_device_list(const int iscapture, AudioDeviceList **list)
{
AudioDeviceList *item;
AudioDeviceList *prev = NULL;
for (item = *list; item != NULL; item = item->next) {
item->alive = SDL_FALSE;
}
build_device_list(iscapture, build_device_change_list, list);
/* free items in the list that aren't still alive. */
item = *list;
while (item != NULL) {
AudioDeviceList *next = item->next;
if (item->alive) {
prev = item;
} else {
SDL_RemoveAudioDevice(iscapture, (void *) ((size_t) item->devid));
if (prev) {
prev->next = item->next;
} else {
*list = item->next;
}
SDL_free(item);
}
item = next;
}
}
/* this is called when the system's list of available audio devices changes. */
static OSStatus
device_list_changed(AudioObjectID systemObj, UInt32 num_addr, const AudioObjectPropertyAddress *addrs, void *data)
{
reprocess_device_list(SDL_TRUE, &capture_devs);
reprocess_device_list(SDL_FALSE, &output_devs);
return 0;
}
#endif
/* The CoreAudio callback */
static OSStatus
outputCallback(void *inRefCon,
AudioUnitRenderActionFlags * ioActionFlags,
const AudioTimeStamp * inTimeStamp,
UInt32 inBusNumber, UInt32 inNumberFrames,
AudioBufferList * ioData)
{
SDL_AudioDevice *this = (SDL_AudioDevice *) inRefCon;
AudioBuffer *abuf;
UInt32 remaining, len;
void *ptr;
UInt32 i;
/* Only do anything if audio is enabled and not paused */
if (!this->enabled || this->paused) {
for (i = 0; i < ioData->mNumberBuffers; i++) {
abuf = &ioData->mBuffers[i];
SDL_memset(abuf->mData, this->spec.silence, abuf->mDataByteSize);
}
return 0;
}
/* No SDL conversion should be needed here, ever, since we accept
any input format in OpenAudio, and leave the conversion to CoreAudio.
*/
/*
SDL_assert(!this->convert.needed);
SDL_assert(this->spec.channels == ioData->mNumberChannels);
*/
for (i = 0; i < ioData->mNumberBuffers; i++) {
abuf = &ioData->mBuffers[i];
remaining = abuf->mDataByteSize;
ptr = abuf->mData;
while (remaining > 0) {
if (this->hidden->bufferOffset >= this->hidden->bufferSize) {
/* Generate the data */
SDL_LockMutex(this->mixer_lock);
(*this->spec.callback)(this->spec.userdata,
this->hidden->buffer, this->hidden->bufferSize);
SDL_UnlockMutex(this->mixer_lock);
this->hidden->bufferOffset = 0;
}
len = this->hidden->bufferSize - this->hidden->bufferOffset;
if (len > remaining)
len = remaining;
SDL_memcpy(ptr, (char *)this->hidden->buffer +
this->hidden->bufferOffset, len);
ptr = (char *)ptr + len;
remaining -= len;
this->hidden->bufferOffset += len;
}
}
return 0;
}
static OSStatus
inputCallback(void *inRefCon,
AudioUnitRenderActionFlags * ioActionFlags,
const AudioTimeStamp * inTimeStamp,
UInt32 inBusNumber, UInt32 inNumberFrames,
AudioBufferList * ioData)
{
/* err = AudioUnitRender(afr->fAudioUnit, ioActionFlags, inTimeStamp, inBusNumber, inNumberFrames, afr->fAudioBuffer); */
/* !!! FIXME: write me! */
return noErr;
}
#if MACOSX_COREAUDIO
static const AudioObjectPropertyAddress alive_address =
{
kAudioDevicePropertyDeviceIsAlive,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
static OSStatus
device_unplugged(AudioObjectID devid, UInt32 num_addr, const AudioObjectPropertyAddress *addrs, void *data)
{
SDL_AudioDevice *this = (SDL_AudioDevice *) data;
SDL_bool dead = SDL_FALSE;
UInt32 isAlive = 1;
UInt32 size = sizeof (isAlive);
OSStatus error;
if (!this->enabled) {
return 0; /* already known to be dead. */
}
error = AudioObjectGetPropertyData(this->hidden->deviceID, &alive_address,
0, NULL, &size, &isAlive);
if (error == kAudioHardwareBadDeviceError) {
dead = SDL_TRUE; /* device was unplugged. */
} else if ((error == kAudioHardwareNoError) && (!isAlive)) {
dead = SDL_TRUE; /* device died in some other way. */
}
if (dead) {
SDL_OpenedAudioDeviceDisconnected(this);
}
return 0;
}
#endif
static void
COREAUDIO_CloseDevice(_THIS)
{
if (this->hidden != NULL) {
if (this->hidden->audioUnitOpened) {
#if MACOSX_COREAUDIO
/* Unregister our disconnect callback. */
AudioObjectRemovePropertyListener(this->hidden->deviceID, &alive_address, device_unplugged, this);
#endif
AURenderCallbackStruct callback;
const AudioUnitElement output_bus = 0;
const AudioUnitElement input_bus = 1;
const int iscapture = this->iscapture;
const AudioUnitElement bus =
((iscapture) ? input_bus : output_bus);
const AudioUnitScope scope =
((iscapture) ? kAudioUnitScope_Output :
kAudioUnitScope_Input);
/* stop processing the audio unit */
AudioOutputUnitStop(this->hidden->audioUnit);
/* Remove the input callback */
SDL_memset(&callback, 0, sizeof(AURenderCallbackStruct));
AudioUnitSetProperty(this->hidden->audioUnit,
kAudioUnitProperty_SetRenderCallback,
scope, bus, &callback, sizeof(callback));
#if MACOSX_COREAUDIO
CloseComponent(this->hidden->audioUnit);
#else
AudioComponentInstanceDispose(this->hidden->audioUnit);
#endif
this->hidden->audioUnitOpened = 0;
}
SDL_free(this->hidden->buffer);
SDL_free(this->hidden);
this->hidden = NULL;
}
}
#if MACOSX_COREAUDIO
static int
prepare_device(_THIS, void *handle, int iscapture)
{
AudioDeviceID devid = (AudioDeviceID) ((size_t) handle);
OSStatus result = noErr;
UInt32 size = 0;
UInt32 alive = 0;
pid_t pid = 0;
AudioObjectPropertyAddress addr = {
0,
kAudioObjectPropertyScopeGlobal,
kAudioObjectPropertyElementMaster
};
if (handle == NULL) {
size = sizeof (AudioDeviceID);
addr.mSelector =
((iscapture) ? kAudioHardwarePropertyDefaultInputDevice :
kAudioHardwarePropertyDefaultOutputDevice);
result = AudioObjectGetPropertyData(kAudioObjectSystemObject, &addr,
0, NULL, &size, &devid);
CHECK_RESULT("AudioHardwareGetProperty (default device)");
}
addr.mSelector = kAudioDevicePropertyDeviceIsAlive;
addr.mScope = iscapture ? kAudioDevicePropertyScopeInput :
kAudioDevicePropertyScopeOutput;
size = sizeof (alive);
result = AudioObjectGetPropertyData(devid, &addr, 0, NULL, &size, &alive);
CHECK_RESULT
("AudioDeviceGetProperty (kAudioDevicePropertyDeviceIsAlive)");
if (!alive) {
SDL_SetError("CoreAudio: requested device exists, but isn't alive.");
return 0;
}
addr.mSelector = kAudioDevicePropertyHogMode;
size = sizeof (pid);
result = AudioObjectGetPropertyData(devid, &addr, 0, NULL, &size, &pid);
/* some devices don't support this property, so errors are fine here. */
if ((result == noErr) && (pid != -1)) {
SDL_SetError("CoreAudio: requested device is being hogged.");
return 0;
}
this->hidden->deviceID = devid;
return 1;
}
#endif
static int
prepare_audiounit(_THIS, void *handle, int iscapture,
const AudioStreamBasicDescription * strdesc)
{
OSStatus result = noErr;
AURenderCallbackStruct callback;
#if MACOSX_COREAUDIO
ComponentDescription desc;
Component comp = NULL;
#else
AudioComponentDescription desc;
AudioComponent comp = NULL;
#endif
const AudioUnitElement output_bus = 0;
const AudioUnitElement input_bus = 1;
const AudioUnitElement bus = ((iscapture) ? input_bus : output_bus);
const AudioUnitScope scope = ((iscapture) ? kAudioUnitScope_Output :
kAudioUnitScope_Input);
#if MACOSX_COREAUDIO
if (!prepare_device(this, handle, iscapture)) {
return 0;
}
#endif
SDL_zero(desc);
desc.componentType = kAudioUnitType_Output;
desc.componentManufacturer = kAudioUnitManufacturer_Apple;
#if MACOSX_COREAUDIO
desc.componentSubType = kAudioUnitSubType_DefaultOutput;
comp = FindNextComponent(NULL, &desc);
#else
desc.componentSubType = kAudioUnitSubType_RemoteIO;
comp = AudioComponentFindNext(NULL, &desc);
#endif
if (comp == NULL) {
SDL_SetError("Couldn't find requested CoreAudio component");
return 0;
}
/* Open & initialize the audio unit */
#if MACOSX_COREAUDIO
result = OpenAComponent(comp, &this->hidden->audioUnit);
CHECK_RESULT("OpenAComponent");
#else
/*
AudioComponentInstanceNew only available on iPhone OS 2.0 and Mac OS X 10.6
We can't use OpenAComponent on iPhone because it is not present
*/
result = AudioComponentInstanceNew(comp, &this->hidden->audioUnit);
CHECK_RESULT("AudioComponentInstanceNew");
#endif
this->hidden->audioUnitOpened = 1;
#if MACOSX_COREAUDIO
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioOutputUnitProperty_CurrentDevice,
kAudioUnitScope_Global, 0,
&this->hidden->deviceID,
sizeof(AudioDeviceID));
CHECK_RESULT
("AudioUnitSetProperty (kAudioOutputUnitProperty_CurrentDevice)");
#endif
/* Set the data format of the audio unit. */
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioUnitProperty_StreamFormat,
scope, bus, strdesc, sizeof(*strdesc));
CHECK_RESULT("AudioUnitSetProperty (kAudioUnitProperty_StreamFormat)");
/* Set the audio callback */
SDL_memset(&callback, 0, sizeof(AURenderCallbackStruct));
callback.inputProc = ((iscapture) ? inputCallback : outputCallback);
callback.inputProcRefCon = this;
result = AudioUnitSetProperty(this->hidden->audioUnit,
kAudioUnitProperty_SetRenderCallback,
scope, bus, &callback, sizeof(callback));
CHECK_RESULT
("AudioUnitSetProperty (kAudioUnitProperty_SetRenderCallback)");
/* Calculate the final parameters for this audio specification */
SDL_CalculateAudioSpec(&this->spec);
/* Allocate a sample buffer */
this->hidden->bufferOffset = this->hidden->bufferSize = this->spec.size;
this->hidden->buffer = SDL_malloc(this->hidden->bufferSize);
result = AudioUnitInitialize(this->hidden->audioUnit);
CHECK_RESULT("AudioUnitInitialize");
/* Finally, start processing of the audio unit */
result = AudioOutputUnitStart(this->hidden->audioUnit);
CHECK_RESULT("AudioOutputUnitStart");
#if MACOSX_COREAUDIO
/* Fire a callback if the device stops being "alive" (disconnected, etc). */
AudioObjectAddPropertyListener(this->hidden->deviceID, &alive_address, device_unplugged, this);
#endif
/* We're running! */
return 1;
}
static int
COREAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
{
AudioStreamBasicDescription strdesc;
SDL_AudioFormat test_format = SDL_FirstAudioFormat(this->spec.format);
int valid_datatype = 0;
/* Initialize all variables that we clean on shutdown */
this->hidden = (struct SDL_PrivateAudioData *)
SDL_malloc((sizeof *this->hidden));
if (this->hidden == NULL) {
return SDL_OutOfMemory();
}
SDL_memset(this->hidden, 0, (sizeof *this->hidden));
/* Setup a AudioStreamBasicDescription with the requested format */
SDL_memset(&strdesc, '\0', sizeof(AudioStreamBasicDescription));
strdesc.mFormatID = kAudioFormatLinearPCM;
strdesc.mFormatFlags = kLinearPCMFormatFlagIsPacked;
strdesc.mChannelsPerFrame = this->spec.channels;
strdesc.mSampleRate = this->spec.freq;
strdesc.mFramesPerPacket = 1;
while ((!valid_datatype) && (test_format)) {
this->spec.format = test_format;
/* Just a list of valid SDL formats, so people don't pass junk here. */
switch (test_format) {
case AUDIO_U8:
case AUDIO_S8:
case AUDIO_U16LSB:
case AUDIO_S16LSB:
case AUDIO_U16MSB:
case AUDIO_S16MSB:
case AUDIO_S32LSB:
case AUDIO_S32MSB:
case AUDIO_F32LSB:
case AUDIO_F32MSB:
valid_datatype = 1;
strdesc.mBitsPerChannel = SDL_AUDIO_BITSIZE(this->spec.format);
if (SDL_AUDIO_ISBIGENDIAN(this->spec.format))
strdesc.mFormatFlags |= kLinearPCMFormatFlagIsBigEndian;
if (SDL_AUDIO_ISFLOAT(this->spec.format))
strdesc.mFormatFlags |= kLinearPCMFormatFlagIsFloat;
else if (SDL_AUDIO_ISSIGNED(this->spec.format))
strdesc.mFormatFlags |= kLinearPCMFormatFlagIsSignedInteger;
break;
}
}
if (!valid_datatype) { /* shouldn't happen, but just in case... */
COREAUDIO_CloseDevice(this);
return SDL_SetError("Unsupported audio format");
}
strdesc.mBytesPerFrame =
strdesc.mBitsPerChannel * strdesc.mChannelsPerFrame / 8;
strdesc.mBytesPerPacket =
strdesc.mBytesPerFrame * strdesc.mFramesPerPacket;
if (!prepare_audiounit(this, handle, iscapture, &strdesc)) {
COREAUDIO_CloseDevice(this);
return -1; /* prepare_audiounit() will call SDL_SetError()... */
}
return 0; /* good to go. */
}
static void
COREAUDIO_Deinitialize(void)
{
#if MACOSX_COREAUDIO
AudioObjectRemovePropertyListener(kAudioObjectSystemObject, &devlist_address, device_list_changed, NULL);
free_audio_device_list(&capture_devs);
free_audio_device_list(&output_devs);
#endif
}
static int
COREAUDIO_Init(SDL_AudioDriverImpl * impl)
{
/* Set the function pointers */
impl->OpenDevice = COREAUDIO_OpenDevice;
impl->CloseDevice = COREAUDIO_CloseDevice;
impl->Deinitialize = COREAUDIO_Deinitialize;
#if MACOSX_COREAUDIO
impl->DetectDevices = COREAUDIO_DetectDevices;
AudioObjectAddPropertyListener(kAudioObjectSystemObject, &devlist_address, device_list_changed, NULL);
#else
impl->OnlyHasDefaultOutputDevice = 1;
/* Set category to ambient sound so that other music continues playing.
You can change this at runtime in your own code if you need different
behavior. If this is common, we can add an SDL hint for this.
*/
AudioSessionInitialize(NULL, NULL, NULL, nil);
UInt32 category = kAudioSessionCategory_AmbientSound;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(UInt32), &category);
#endif
impl->ProvidesOwnCallbackThread = 1;
return 1; /* this audio target is available. */
}
AudioBootStrap COREAUDIO_bootstrap = {
"coreaudio", "CoreAudio", COREAUDIO_Init, 0
};
#endif /* SDL_AUDIO_DRIVER_COREAUDIO */
/* vi: set ts=4 sw=4 expandtab: */
alive
int alive
Definition: testsem.c:24
SDL_coreaudio.h
SDL_LockMutex
#define SDL_LockMutex
Definition: SDL_dynapi_overrides.h:266
SDL_FirstAudioFormat
SDL_AudioFormat SDL_FirstAudioFormat(SDL_AudioFormat format)
Definition: SDL_audio.c:1398
AUDIO_S32MSB
#define AUDIO_S32MSB
Definition: SDL_audio.h:104
result
GLuint64EXT * result
Definition: SDL_opengl_glext.h:9432
SDL_AudioDriverImpl::DetectDevices
void(* DetectDevices)(void)
Definition: SDL_sysaudio.h:71
SDL_AUDIO_ISBIGENDIAN
#define SDL_AUDIO_ISBIGENDIAN(x)
Definition: SDL_audio.h:77
AUDIO_U16LSB
#define AUDIO_U16LSB
Definition: SDL_audio.h:91
data
GLint GLenum GLsizei GLsizei GLsizei GLint GLsizei const GLvoid * data
Definition: SDL_opengl.h:1967
SDL_AudioDriverImpl::ProvidesOwnCallbackThread
int ProvidesOwnCallbackThread
Definition: SDL_sysaudio.h:89
SDL_AUDIO_ISSIGNED
#define SDL_AUDIO_ISSIGNED(x)
Definition: SDL_audio.h:78
SDL_OpenedAudioDeviceDisconnected
void SDL_OpenedAudioDeviceDisconnected(SDL_AudioDevice *device)
Definition: SDL_audio.c:364
SDL_AudioFormat
Uint16 SDL_AudioFormat
Audio format flags.
Definition: SDL_audio.h:64
name
GLuint const GLchar * name
Definition: SDL_opengl_glext.h:660
SDL_PrivateAudioData
Definition: SDL_alsa_audio.h:33
size
GLsizeiptr size
Definition: SDL_opengl_glext.h:537
len
GLenum GLsizei len
Definition: SDL_opengl_glext.h:2926
AUDIO_F32MSB
#define AUDIO_F32MSB
Definition: SDL_audio.h:113
SDL_bool
SDL_bool
Definition: SDL_stdinc.h:126
spec
SDL_AudioSpec spec
Definition: loopwave.c:35
SDL_AUDIO_ISFLOAT
#define SDL_AUDIO_ISFLOAT(x)
Definition: SDL_audio.h:76
AUDIO_U8
#define AUDIO_U8
Definition: SDL_audio.h:89
SDL_memcpy
#define SDL_memcpy
Definition: SDL_dynapi_overrides.h:393
AudioBootStrap
Definition: SDL_sysaudio.h:189
SDL_AudioDriverImpl::OnlyHasDefaultOutputDevice
int OnlyHasDefaultOutputDevice
Definition: SDL_sysaudio.h:92
SDL_AudioSpec::freq
int freq
Definition: SDL_audio.h:170
SDL_RemoveAudioDevice
void SDL_RemoveAudioDevice(const int iscapture, void *handle)
Definition: SDL_audio.c:405
SDL_AudioSpec::channels
Uint8 channels
Definition: SDL_audio.h:172
_THIS
#define _THIS
Definition: SDL_alsa_audio.h:31
SDL_free
void SDL_free(void *mem)
addr
GLenum const void * addr
Definition: SDL_opengl_glext.h:7945
SDL_AUDIO_BITSIZE
#define SDL_AUDIO_BITSIZE(x)
Definition: SDL_audio.h:75
AUDIO_F32LSB
#define AUDIO_F32LSB
Definition: SDL_audio.h:112
SDL_AudioDriverImpl
Definition: SDL_sysaudio.h:69
SDL_AudioDriverImpl::Deinitialize
void(* Deinitialize)(void)
Definition: SDL_sysaudio.h:83
COREAUDIO_bootstrap
AudioBootStrap COREAUDIO_bootstrap
AUDIO_S32LSB
#define AUDIO_S32LSB
Definition: SDL_audio.h:103
SDL_zero
#define SDL_zero(x)
Definition: SDL_stdinc.h:355
callback
static Uint32 callback(Uint32 interval, void *param)
Definition: testtimer.c:34
paused
int paused
Definition: testoverlay2.c:149
SDL_CalculateAudioSpec
void SDL_CalculateAudioSpec(SDL_AudioSpec *spec)
Definition: SDL_audio.c:1419
SDL_TRUE
Definition: SDL_stdinc.h:129
SDL_AudioSpec::callback
SDL_AudioCallback callback
Definition: SDL_audio.h:177
enabled
GLenum GLenum GLsizei const GLuint GLboolean enabled
Definition: SDL_opengl_glext.h:2479
SDL_AudioSpec::size
Uint32 size
Definition: SDL_audio.h:176
i
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:42
SDL_AudioDriverImpl::OpenDevice
int(* OpenDevice)(_THIS, void *handle, const char *devname, int iscapture)
Definition: SDL_sysaudio.h:72
NULL
#define NULL
Definition: begin_code.h:143
SDL_OutOfMemory
#define SDL_OutOfMemory()
Definition: SDL_error.h:52
SDL_SetError
#define SDL_SetError
Definition: SDL_dynapi_overrides.h:36
void
SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char int SDL_PRINTF_FORMAT_STRING const char const char SDL_SCANF_FORMAT_STRING const char return SDL_ThreadFunction const char void return Uint32 return Uint32 void
Definition: SDL_dynapi_procs.h:93
SDL_AudioDriverImpl::CloseDevice
void(* CloseDevice)(_THIS)
Definition: SDL_sysaudio.h:79
AUDIO_S16MSB
#define AUDIO_S16MSB
Definition: SDL_audio.h:94
SDL_audio.h
SDL_AudioDevice
Definition: SDL_sysaudio.h:143
SDL_AudioSpec::format
SDL_AudioFormat format
Definition: SDL_audio.h:171
SDL_FALSE
Definition: SDL_stdinc.h:128
AUDIO_S16LSB
#define AUDIO_S16LSB
Definition: SDL_audio.h:92
SDL_AudioSpec::userdata
void * userdata
Definition: SDL_audio.h:178
SDL_UnlockMutex
#define SDL_UnlockMutex
Definition: SDL_dynapi_overrides.h:268
SDL_malloc
#define SDL_malloc
Definition: SDL_dynapi_overrides.h:380
AUDIO_S8
#define AUDIO_S8
Definition: SDL_audio.h:90
SDL_memset
#define SDL_memset
Definition: SDL_dynapi_overrides.h:392
SDL_assert.h
AUDIO_U16MSB
#define AUDIO_U16MSB
Definition: SDL_audio.h:93
SDL_AddAudioDevice
void SDL_AddAudioDevice(const int iscapture, const char *name, void *handle)
Definition: SDL_audio.c:347
j
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int int in j)
Definition: SDL_x11sym.h:42