Automatically start audio updates even when no hardware has update re…

…sponsibility
PaulStoffregen · Aug 24, 2022 · 503cd9f · 503cd9f
1 parent 4e35529
commit 503cd9f
Show file tree

Hide file tree

Showing 2 changed files with 20 additions and 2 deletions.
diff --git a/teensy3/AudioStream.cpp b/teensy3/AudioStream.cpp
@@ -81,8 +81,17 @@ void AudioStream::initialize_memory(audio_block_t *data, unsigned int num)
 	for (i=0; i < num; i++) {
 		data[i].memory_pool_index = i;
 	}
+	if (update_scheduled == false) {
+		// if no hardware I/O has taken responsibility for update,
+		// start a timer which will call update_all() at the correct rate
+		IntervalTimer *timer = new IntervalTimer();
+		if (timer) {
+			float usec = 1e6 * AUDIO_BLOCK_SAMPLES / AUDIO_SAMPLE_RATE_EXACT;
+			timer->begin(update_all, usec);
+			update_setup();
+		}
+	}
 	__enable_irq();
-
 }
 
 // Allocate 1 audio data block.  If successful

diff --git a/teensy4/AudioStream.cpp b/teensy4/AudioStream.cpp
@@ -73,8 +73,17 @@ FLASHMEM void AudioStream::initialize_memory(audio_block_t *data, unsigned int n
 	for (i=0; i < num; i++) {
 		data[i].memory_pool_index = i;
 	}
+	if (update_scheduled == false) {
+		// if no hardware I/O has taken responsibility for update,
+		// start a timer which will call update_all() at the correct rate
+		IntervalTimer *timer = new IntervalTimer();
+		if (timer) {
+			float usec = 1e6 * AUDIO_BLOCK_SAMPLES / AUDIO_SAMPLE_RATE_EXACT;
+			timer->begin(update_all, usec);
+			update_setup();
+		}
+	}
 	__enable_irq();
-
 }
 
 // Allocate 1 audio data block.  If successful