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OpenAudio_ArduinoLibrary/record_queue_f32.cpp

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/* Audio Library for Teensy 3.X
* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
*
* Development of this audio library was funded by PJRC.COM, LLC by sales of
* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
* open source software by purchasing Teensy or other PJRC products.
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice, development funding notice, and this permission
* notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include "record_queue_f32.h"
#include "utility/dspinst.h"
int AudioRecordQueue_F32::available(void)
{
uint32_t h, t;
h = head;
t = tail;
if (h >= t) return h - t;
return 53 + h - t;
}
void AudioRecordQueue_F32::clear(void)
{
uint32_t t;
if (userblock) {
AudioStream_F32::release(userblock);
userblock = NULL;
}
t = tail;
while (t != head) {
if (++t >= 53) t = 0;
AudioStream_F32::release(queue[t]);
}
tail = t;
}
float32_t * AudioRecordQueue_F32::readBuffer(void)
{
// uint32_t t;
//
// if (userblock) return NULL;
// t = tail;
// if (t == head) return NULL;
// if (++t >= 53) t = 0;
// userblock = queue[t];
// tail = t;
// return userblock->data;
return getAudioBlock()->data;
}
audio_block_f32_t * AudioRecordQueue_F32::getAudioBlock(void)
{
uint32_t t;
if (userblock != NULL) return NULL;
t = tail;
if (t == head) return NULL;
if (++t >= 53) t = 0;
userblock = queue[t];
tail = t;
return userblock;
}
void AudioRecordQueue_F32::freeBuffer(void)
{
if (userblock == NULL) return;
AudioStream_F32::release(userblock);
userblock = NULL;
}
void AudioRecordQueue_F32::freeAudioBlock(void) {
freeBuffer();
}
void AudioRecordQueue_F32::update(void)
{
audio_block_f32_t *block;
uint32_t h;
block = receiveReadOnly_f32();
if (block==NULL) return;
if (!enabled) {
AudioStream_F32::release(block);
return;
}
h = head + 1;
if (h >= 53) h = 0;
if (h == tail) {
AudioStream_F32::release(block);
} else {
queue[h] = block;
head = h;
}
}