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Added a hint SDL_HINT_AUDIO_CATEGORY to control the audio category,

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determining whether the phone mute switch affects the audio
This commit is contained in:
Sam Lantinga 2017-09-15 17:27:32 -07:00
parent 2f3634ab69
commit 1e197f83b5
3 changed files with 29 additions and 5 deletions
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19
src/audio/coreaudio/SDL_coreaudio.m
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@ -25,6 +25,7 @@
/* !!! FIXME: clean out some of the macro salsa in here. */
#include "SDL_audio.h"
#include "SDL_hints.h"
#include "../SDL_audio_c.h"
#include "../SDL_sysaudio.h"
#include "SDL_coreaudio.h"
@ -325,7 +326,8 @@ static BOOL update_audio_session(_THIS, SDL_bool open)
@autoreleasepool {
AVAudioSession *session = [AVAudioSession sharedInstance];
NSNotificationCenter *center = [NSNotificationCenter defaultCenter];
NSString *category;
/* Set category to ambient by default so that other music continues playing. */
NSString *category = AVAudioSessionCategoryAmbient;
NSError *err = nil;
if (open_playback_devices && open_capture_devices) {
@ -333,10 +335,17 @@ static BOOL update_audio_session(_THIS, SDL_bool open)
} 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;
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 (![session setCategory:category error:&err]) {