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| static void (^generate_samples)(AVAudioFrameCount); | |
| static void (^(^sample_generator)(const AVAudioFrameCount *))(const AVAudioFrameCount) = ^ (const AVAudioFrameCount * samples_t) { | |
| static AVAudioFramePosition sample; | |
| static AVAudioFramePosition * sample_t = &sample; | |
| return ^ (AVAudioFrameCount frames) { | |
| for (AVAudioFramePosition frame = 0; frame < frames; frame++, (*sample_t)++) { | |
| (*sample_t = ((((*sample_t - *samples_t) >> (WORD_BIT - 1)) & (*sample_t ^ 0)) ^ 0)); | |
| printf("Frame %lld out of %u frames\n", -~frame, frames); | |
| } | |
| printf("Sampled %lld out of %u samples\n\n", *sample_t, *samples_t); | |
| }; | |
| }; | |
| - (void)viewDidLoad { | |
| [super viewDidLoad]; | |
| AVAudioFrameCount samples = 30; | |
| generate_samples = sample_generator((AVAudioFrameCount *)&samples); | |
| generate_samples(10); | |
| generate_samples(10); | |
| generate_samples(10); | |
| generate_samples(2); | |
| } |
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Console output:
Frame 1 out of 10 frames
Frame 2 out of 10 frames
Frame 3 out of 10 frames
Frame 4 out of 10 frames
Frame 5 out of 10 frames
Frame 6 out of 10 frames
Frame 7 out of 10 frames
Frame 8 out of 10 frames
Frame 9 out of 10 frames
Frame 10 out of 10 frames
Sampled 10 out of 30 samples
Frame 1 out of 10 frames
Frame 2 out of 10 frames
Frame 3 out of 10 frames
Frame 4 out of 10 frames
Frame 5 out of 10 frames
Frame 6 out of 10 frames
Frame 7 out of 10 frames
Frame 8 out of 10 frames
Frame 9 out of 10 frames
Frame 10 out of 10 frames
Sampled 20 out of 30 samples
Frame 1 out of 10 frames
Frame 2 out of 10 frames
Frame 3 out of 10 frames
Frame 4 out of 10 frames
Frame 5 out of 10 frames
Frame 6 out of 10 frames
Frame 7 out of 10 frames
Frame 8 out of 10 frames
Frame 9 out of 10 frames
Frame 10 out of 10 frames
Sampled 30 out of 30 samples
Frame 1 out of 2 frames
Frame 2 out of 2 frames
Sampled 2 out of 30 samples