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Playback: Start playback and seek in the background

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Perform playback start and seeking operations in the background, instead
of on the main thread, which should help prevent them from stalling the
user interface.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
This commit is contained in:
Christopher Snowhill 2023-09-02 22:28:05 -07:00
parent d069aa0361
commit 8d2425b06a
No known key found for this signature in database
3 changed files with 45 additions and 6 deletions
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41
Application/PlaybackController.m
View file

@ -23,6 +23,35 @@
extern BOOL kAppControllerShuttingDown;
@implementation NSObject (NxAdditions)
-(void)performSelectorInBackground:(SEL)selector withObjects:(id)object, ...
{
NSMethodSignature *signature = [self methodSignatureForSelector:selector];
// Setup the invocation
NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];
invocation.target = self;
invocation.selector = selector;
// Associate the arguments
va_list objects;
va_start(objects, object);
unsigned int objectCounter = 2;
for (id obj = object; obj != nil; obj = va_arg(objects, id))
{
[invocation setArgument:&obj atIndex:objectCounter++];
}
va_end(objects);
// Make sure to invoke on a background queue
NSInvocationOperation *operation = [[NSInvocationOperation alloc] initWithInvocation:invocation];
NSOperationQueue *backgroundQueue = [[NSOperationQueue alloc] init];
[backgroundQueue addOperation:operation];
}
@end
@implementation PlaybackController
#define DEFAULT_SEEK 5
@ -241,7 +270,7 @@ NSDictionary *makeRGInfo(PlaylistEntry *pe) {
double seekTime = pe.seekable ? [offset doubleValue] : 0.0;
[audioPlayer play:pe.url withUserInfo:pe withRGInfo:makeRGInfo(pe) startPaused:paused andSeekTo:seekTime];
[audioPlayer performSelectorInBackground:@selector(playBG:withUserInfo:withRGInfo:startPaused:andSeekTo:) withObjects:pe.url, pe, makeRGInfo(pe), @(paused), @(seekTime), nil];
}
- (IBAction)next:(id)sender {
@ -272,7 +301,7 @@ NSDictionary *makeRGInfo(PlaylistEntry *pe) {
- (IBAction)seek:(id)sender {
double time = [sender doubleValue];
[audioPlayer seekToTime:time];
[audioPlayer performSelectorInBackground:@selector(seekToTimeBG:) withObject:@(time)];
lastPosition = -10;
@ -289,7 +318,7 @@ NSDictionary *makeRGInfo(PlaylistEntry *pe) {
lastPosition = -10;
[audioPlayer seekToTime:time];
[audioPlayer performSelectorInBackground:@selector(seekToTimeBG:) withObject:@(time)];
[self setPosition:time];
@ -321,7 +350,7 @@ NSDictionary *makeRGInfo(PlaylistEntry *pe) {
[self next:self];
} else {
lastPosition = -10;
[audioPlayer seekToTime:seekTo];
[audioPlayer performSelectorInBackground:@selector(seekToTimeBG:) withObject:@(seekTo)];
[self setPosition:seekTo];
}
}
@ -338,7 +367,7 @@ NSDictionary *makeRGInfo(PlaylistEntry *pe) {
lastPosition = -10;
[audioPlayer seekToTime:seekTo];
[audioPlayer performSelectorInBackground:@selector(seekToTimeBG:) withObject:@(seekTo)];
[self setPosition:seekTo];
}
@ -704,7 +733,7 @@ NSDictionary *makeRGInfo(PlaylistEntry *pe) {
PlaylistEntry *pe = [playlistController currentEntry];
BOOL paused = playbackStatus == CogStatusPaused;
[[FIRCrashlytics crashlytics] logWithFormat:@"Restarting playback of track: %@", pe.url];
[player play:pe.url withUserInfo:pe withRGInfo:makeRGInfo(pe) startPaused:paused andSeekTo:pe.seekable ? pe.currentPosition : 0.0];
[player performSelectorInBackground:@selector(playBG:withUserInfo:withRGInfo:startPaused:andSeekTo:) withObjects:pe.url, pe, makeRGInfo(pe), @(paused), @(pe.seekable ? pe.currentPosition : 0.0), nil];
}
- (void)audioPlayer:(AudioPlayer *)player pushInfo:(NSDictionary *)info toTrack:(id)userInfo {

2
Audio/AudioPlayer.h
View file

@ -61,12 +61,14 @@
- (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi;
- (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(BOOL)paused;
- (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(BOOL)paused andSeekTo:(double)time;
- (void)playBG:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(NSNumber *)paused andSeekTo:(NSNumber *)time;
- (void)stop;
- (void)pause;
- (void)resume;
- (void)seekToTime:(double)time;
- (void)seekToTimeBG:(NSNumber *)time;
- (void)setVolume:(double)v;
- (double)volume;
- (double)volumeUp:(double)amount;

8
Audio/AudioPlayer.m
View file

@ -56,6 +56,10 @@
[self play:url withUserInfo:userInfo withRGInfo:rgi startPaused:paused andSeekTo:0.0];
}
- (void)playBG:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(NSNumber *)paused andSeekTo:(NSNumber *)time {
[self play:url withUserInfo:userInfo withRGInfo:rgi startPaused:[paused boolValue] andSeekTo:[time doubleValue]];
}
- (void)play:(NSURL *)url withUserInfo:(id)userInfo withRGInfo:(NSDictionary *)rgi startPaused:(BOOL)paused andSeekTo:(double)time {
ALog(@"Opening file for playback: %@ at seek offset %f%@", url, time, (paused) ? @", starting paused" : @"");
@ -165,6 +169,10 @@
[self setPlaybackStatus:CogStatusPlaying waitUntilDone:YES];
}
- (void)seekToTimeBG:(NSNumber *)time {
[self seekToTime:[time doubleValue]];
}
- (void)seekToTime:(double)time {
if(endOfInputReached) {
// This is a dirty hack in case the playback has finished with the track