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Allow background music to play in the "play and record" case on iOS

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slouken committed Mar 27, 2020
1 parent 369e5f3 commit abdc5cbf24375800965624915be597d2aeed5d6f
Showing with 39 additions and 29 deletions.
  1. +39 −29 src/audio/coreaudio/SDL_coreaudio.m
@@ -327,44 +327,54 @@ static BOOL update_audio_session(_THIS, SDL_bool open)
AVAudioSession *session = [AVAudioSession sharedInstance];
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];

/* Set category to ambient by default so that other music continues playing. */
NSString *category = AVAudioSessionCategoryAmbient;
NSString *category = AVAudioSessionCategoryPlayback;
NSString *mode = AVAudioSessionModeDefault;
NSUInteger options = 0;
NSUInteger options = AVAudioSessionCategoryOptionMixWithOthers;
NSError *err = nil;

if (open_playback_devices && open_capture_devices) {
const char *hint;

hint = SDL_GetHint(SDL_HINT_AUDIO_CATEGORY);
if (hint) {
if (SDL_strcasecmp(hint, "AVAudioSessionCategoryAmbient") == 0) {
category = AVAudioSessionCategoryAmbient;
} else if (SDL_strcasecmp(hint, "AVAudioSessionCategorySoloAmbient") == 0) {
category = AVAudioSessionCategorySoloAmbient;
options &= ~AVAudioSessionCategoryOptionMixWithOthers;
} else if (SDL_strcasecmp(hint, "AVAudioSessionCategoryPlayback") == 0 ||
SDL_strcasecmp(hint, "playback") == 0) {
category = AVAudioSessionCategoryPlayback;
options &= ~AVAudioSessionCategoryOptionMixWithOthers;
} else if (SDL_strcasecmp(hint, "AVAudioSessionCategoryPlayAndRecord") == 0 ||
SDL_strcasecmp(hint, "playandrecord") == 0) {
category = AVAudioSessionCategoryPlayAndRecord;
}
} else if (open_playback_devices && open_capture_devices) {
category = AVAudioSessionCategoryPlayAndRecord;
#if !TARGET_OS_TV
options = AVAudioSessionCategoryOptionDefaultToSpeaker;
#endif
} else if (open_capture_devices) {
category = AVAudioSessionCategoryRecord;
} else {
const char *hint = SDL_GetHint(SDL_HINT_AUDIO_CATEGORY);
if (hint) {
if (SDL_strcasecmp(hint, "AVAudioSessionCategoryAmbient") == 0) {
category = AVAudioSessionCategoryAmbient;
} else if (SDL_strcasecmp(hint, "AVAudioSessionCategorySoloAmbient") == 0) {
category = AVAudioSessionCategorySoloAmbient;
} else if (SDL_strcasecmp(hint, "AVAudioSessionCategoryPlayback") == 0 ||
SDL_strcasecmp(hint, "playback") == 0) {
category = AVAudioSessionCategoryPlayback;
}
}
}

#if !TARGET_OS_TV
if (category == AVAudioSessionCategoryPlayAndRecord) {
options |= AVAudioSessionCategoryOptionDefaultToSpeaker;
}
#endif

if ([session respondsToSelector:@selector(setCategory:mode:options:error:)]) {
if (![session setCategory:category mode:mode options:options error:&err]) {
NSString *desc = err.description;
SDL_SetError("Could not set Audio Session category: %s", desc.UTF8String);
return NO;
if (![session.category isEqualToString:category] || session.categoryOptions != options) {
if (![session setCategory:category mode:mode options:options error:&err]) {
NSString *desc = err.description;
SDL_SetError("Could not set Audio Session category: %s", desc.UTF8String);
return NO;
}
}
} else {
if (![session setCategory:category error:&err]) {
NSString *desc = err.description;
SDL_SetError("Could not set Audio Session category: %s", desc.UTF8String);
return NO;
if (![session.category isEqualToString:category]) {
if (![session setCategory:category error:&err]) {
NSString *desc = err.description;
SDL_SetError("Could not set Audio Session category: %s", desc.UTF8String);
return NO;
}
}
}

@@ -864,7 +874,7 @@ static BOOL update_audio_session(_THIS, SDL_bool open)
this->spec.channels = session.preferredOutputNumberOfChannels;
}
#else
/* Calling setPreferredOutputNumberOfChannels seems to break audio output on iOS */
/* Calling setPreferredOutputNumberOfChannels seems to break audio output on iOS */
#endif /* TARGET_OS_TV */
}
#endif

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