128 lines
3.4 KiB
C++
Executable file
128 lines
3.4 KiB
C++
Executable file
/* Audio Library for Teensy 3.X
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* Copyright (c) 2014, Paul Stoffregen, paul@pjrc.com
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*
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* Development of this audio library was funded by PJRC.COM, LLC by sales of
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* Teensy and Audio Adaptor boards. Please support PJRC's efforts to develop
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* open source software by purchasing Teensy or other PJRC products.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice, development funding notice, and this permission
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* notice shall be included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <Arduino.h>
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#include "play_sd_raw.h"
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#include "spi_interrupt.h"
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void AudioPlaySdRaw::begin(void)
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{
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playing = false;
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file_offset = 0;
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file_size = 0;
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}
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bool AudioPlaySdRaw::play(const char *filename)
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{
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stop();
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#if defined(HAS_KINETIS_SDHC)
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if (!(SIM_SCGC3 & SIM_SCGC3_SDHC)) AudioStartUsingSPI();
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#else
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AudioStartUsingSPI();
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#endif
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__disable_irq();
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rawfile.open(filename);
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__enable_irq();
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if (!rawfile) {
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//Serial.println("unable to open file");
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#if defined(HAS_KINETIS_SDHC)
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if (!(SIM_SCGC3 & SIM_SCGC3_SDHC)) AudioStopUsingSPI();
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#else
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AudioStopUsingSPI();
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#endif
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return false;
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}
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file_size = rawfile.size();
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file_offset = 0;
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//Serial.println("able to open file");
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playing = true;
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return true;
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}
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void AudioPlaySdRaw::stop(void)
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{
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__disable_irq();
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if (playing) {
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playing = false;
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__enable_irq();
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rawfile.close();
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#if defined(HAS_KINETIS_SDHC)
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if (!(SIM_SCGC3 & SIM_SCGC3_SDHC)) AudioStopUsingSPI();
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#else
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AudioStopUsingSPI();
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#endif
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} else {
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__enable_irq();
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}
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}
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void AudioPlaySdRaw::update(void)
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{
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unsigned int i, n;
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audio_block_t *block;
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// only update if we're playing
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if (!playing) return;
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// allocate the audio blocks to transmit
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block = allocate();
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if (block == NULL) return;
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if (rawfile.available()) {
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// we can read more data from the file...
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n = rawfile.read(block->data, AUDIO_BLOCK_SAMPLES*2);
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file_offset += n;
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for (i=n/2; i < AUDIO_BLOCK_SAMPLES; i++) {
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block->data[i] = 0;
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}
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transmit(block);
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} else {
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rawfile.close();
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#if defined(HAS_KINETIS_SDHC)
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if (!(SIM_SCGC3 & SIM_SCGC3_SDHC)) AudioStopUsingSPI();
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#else
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AudioStopUsingSPI();
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#endif
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playing = false;
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}
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release(block);
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}
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#define B2M (uint32_t)((double)4294967296000.0 / AUDIO_SAMPLE_RATE_EXACT / 2.0) // 97352592
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uint32_t AudioPlaySdRaw::positionMillis(void)
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{
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return ((uint64_t)file_offset * B2M) >> 32;
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}
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uint32_t AudioPlaySdRaw::lengthMillis(void)
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{
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return ((uint64_t)file_size * B2M) >> 32;
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}
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