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Code Issues Actions 2 Packages Projects Releases Wiki Activity

CoreAudio iOS/tvOS: Use AVFoundation instead of AudioSession. Fixes audio on tvOS.

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Note that linking with AVFoundation is now required if you don't disable SDL_audio compilation on iOS and tvOS.
This commit is contained in:
Alex Szpakowski
2016-09-15 19:59:57 -03:00
parent dbe2997ac0
commit 4209a1fd4c
8 changed files with 343 additions and 46 deletions
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20
Xcode-iOS/Demos/Demos.xcodeproj/project.pbxproj
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12
Xcode-iOS/SDL/SDL.xcodeproj/project.pbxproj
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Xcode/SDL/SDL.xcodeproj/project.pbxproj
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DB31400117554B71006C0E22 /* SDL_dummyaudio.c in Sources */,
DB31400217554B71006C0E22 /* SDL_coreaudio.c in Sources */,
DB31400317554B71006C0E22 /* SDL_audio.c in Sources */,
DB31400417554B71006C0E22 /* SDL_audiocvt.c in Sources */,
DB31400517554B71006C0E22 /* SDL_audiodev.c in Sources */,

1
premake/README-ios.txt
View File

@@ -27,6 +27,7 @@ Xcode-iOS project. Those are:
-CoreAudio.framework
-CoreMotion.framework
-GameController.framework
-AVFoundation.framework
All of these frameworks are part of the iOS SDK, not part of the core OS X
system.

3
premake/projects/SDL2.lua
View File

@@ -405,5 +405,6 @@ SDL_project "SDL2"
"$(SDKROOT)/Foundation.framework",
"$(SDKROOT)/CoreAudio.framework",
"$(SDKROOT)/CoreMotion.framework",
"$(SDKROOT)/GameController.framework"
"$(SDKROOT)/GameController.framework",
"$(SDKROOT)/AVFoundation.framework",
}

2
src/audio/coreaudio/SDL_coreaudio.h
View File

@@ -32,6 +32,8 @@
#if MACOSX_COREAUDIO
#include <CoreAudio/CoreAudio.h>
#include <CoreServices/CoreServices.h>
#else
#import <AVFoundation/AVFoundation.h>
#endif
#include <AudioToolbox/AudioToolbox.h>

70
src/audio/coreaudio/SDL_coreaudio.c → src/audio/coreaudio/SDL_coreaudio.m
View File

@@ -272,21 +272,45 @@ device_list_changed(AudioObjectID systemObj, UInt32 num_addr, const AudioObjectP
static int open_playback_devices = 0;
static int open_capture_devices = 0;
static void update_audio_session()
#if !MACOSX_COREAUDIO
static BOOL update_audio_session()
{
#if !MACOSX_COREAUDIO && !TARGET_OS_TV
/* !!! FIXME: move this to AVAudioSession. This is deprecated, and the new version is available as of (ancient!) iOS 3.0 */
UInt32 category;
if (open_playback_devices && open_capture_devices) {
category = kAudioSessionCategory_PlayAndRecord;
} else if (open_capture_devices) {
category = kAudioSessionCategory_RecordAudio;
} else { /* nothing open, or just playing audio. */
category = kAudioSessionCategory_AmbientSound;
@autoreleasepool {
AVAudioSession *session = [AVAudioSession sharedInstance];
NSString *category;
NSError *err = nil;
if (open_playback_devices && open_capture_devices) {
category = AVAudioSessionCategoryPlayAndRecord;
} else if (open_capture_devices) {
category = AVAudioSessionCategoryRecord;
} else {
/* Set category to ambient 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. */
category = AVAudioSessionCategoryAmbient;
}
if (open_playback_devices + open_capture_devices == 1) {
if (![session setActive:YES error:&err]) {
NSString *desc = err.description;
SDL_SetError("Could not activate Audio Session: %s", desc.UTF8String);
return NO;
}
} else if (!open_playback_devices && !open_capture_devices) {
[session setActive:NO error:nil];
}
if (![session setCategory:category error:&err]) {
NSString *desc = err.description;
SDL_SetError("Could not set Audio Session category: %s", desc.UTF8String);
return NO;
}
}
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof (UInt32), &category);
#endif
return YES;
}
#endif
/* The AudioQueue callback */
@@ -444,7 +468,10 @@ COREAUDIO_CloseDevice(_THIS)
} else {
open_playback_devices--;
}
#if !MACOSX_COREAUDIO
update_audio_session();
#endif
}
#if MACOSX_COREAUDIO
@@ -620,7 +647,12 @@ COREAUDIO_OpenDevice(_THIS, void *handle, const char *devname, int iscapture)
} else {
open_playback_devices++;
}
update_audio_session();
#if !MACOSX_COREAUDIO
if (!update_audio_session()) {
return -1;
}
#endif
/* Setup a AudioStreamBasicDescription with the requested format */
SDL_zerop(strdesc);
@@ -718,18 +750,6 @@ COREAUDIO_Init(SDL_AudioDriverImpl * impl)
#else
impl->OnlyHasDefaultOutputDevice = 1;
impl->OnlyHasDefaultCaptureDevice = 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.
!!! FIXME: do this when a device is opened, and deinitialize when all devices close.
*/
/* !!! FIXME: move this to AVAudioSession. This is deprecated, and the new version is available as of (ancient!) iOS 3.0 */
#if !TARGET_OS_TV
AudioSessionInitialize(NULL, NULL, NULL, nil);
UInt32 category = kAudioSessionCategory_AmbientSound;
AudioSessionSetProperty(kAudioSessionProperty_AudioCategory, sizeof(UInt32), &category);
#endif /* !TARGET_OS_TV */
#endif
impl->ProvidesOwnCallbackThread = 1;