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74 lines
1.5 KiB
74 lines
1.5 KiB
/*
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* AudioRecordQueue_F32
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*
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* Created: Chip Audette (OpenAudio), Feb 2017
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* Extended from on Teensy Audio Library
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*
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* License: MIT License. Use at your own risk.
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*/
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#include "play_queue_f32.h"
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#include "utility/dspinst.h"
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bool AudioPlayQueue_F32::available(void)
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{
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if (userblock) return true;
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userblock = allocate_f32();
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if (userblock) return true;
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return false;
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}
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float32_t * AudioPlayQueue_F32::getBuffer(void)
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{
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if (userblock) return userblock->data;
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while (1) {
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userblock = allocate_f32();
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if (userblock) return userblock->data;
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yield();
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}
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}
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void AudioPlayQueue_F32::playBuffer(void)
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{
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uint32_t h;
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if (!userblock) return;
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h = head + 1;
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if (h >= 32) h = 0;
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while (tail == h) ; // wait until space in the queue
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queue[h] = userblock;
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head = h;
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userblock = NULL;
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}
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void AudioPlayQueue_F32::update(void)
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{
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audio_block_f32_t *block;
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uint32_t t;
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t = tail;
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if (t != head) {
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if (++t >= 32) t = 0;
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block = queue[t];
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tail = t;
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transmit(block);
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release(block);
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}
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}
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//assume user already has an audio_block that was NOT allocated by this
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//playBuffer. Here, you hand it your buffer. This object takes ownership
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//of it and puts it into the queue
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void AudioPlayQueue_F32::playAudioBlock(audio_block_f32_t *audio_block) {
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uint32_t h;
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if (!audio_block) return;
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h = head + 1;
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if (h >= 32) h = 0;
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while (tail == h) ; // wait until space in the queue
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queue[h] = audio_block;
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audio_block->ref_count++; //take ownership of this block
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head = h;
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//userblock = NULL;
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}
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