28642ab10d
This evolves the API from 2.x (and breaks it). Playback devices are now separate from the samples themselves. This allows for greater playback flexibility. Two sample sources are audioio.RawSample and audioio.WaveFile. They can both be mono or stereo. They can be output to audioio.AudioOut or audiobusio.I2SOut. Internally, the dma tracking has changed from a TC counting block transfers to an interrupt generated by the block event sent to the EVSYS. This reduces the overhead of each DMA transfer so multiple can occure without using up TCs. Fixes #652. Fixes #522. Huge progress on #263
69 lines
2.7 KiB
C
69 lines
2.7 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2018 Scott Shawcroft
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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 and this permission notice shall be included in
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* 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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#ifndef MICROPY_INCLUDED_SHARED_MODULE_AUDIOIO_WAVEFILE_H
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#define MICROPY_INCLUDED_SHARED_MODULE_AUDIOIO_WAVEFILE_H
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#include "py/obj.h"
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typedef struct {
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mp_obj_base_t base;
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uint8_t* buffer;
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uint32_t buffer_length;
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uint8_t* second_buffer;
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uint32_t second_buffer_length;
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uint32_t file_length; // In bytes
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uint16_t data_start; // Where the data values start
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uint8_t bits_per_sample;
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uint16_t buffer_index;
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uint32_t bytes_remaining;
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uint8_t channel_count;
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uint16_t sample_rate;
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uint32_t len;
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pyb_file_obj_t* file;
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uint32_t read_count;
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uint32_t left_read_count;
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uint32_t right_read_count;
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} audioio_wavefile_obj_t;
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// These are not available from Python because it may be called in an interrupt.
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void audioio_wavefile_reset_buffer(audioio_wavefile_obj_t* self,
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bool single_channel,
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uint8_t channel);
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bool audioio_wavefile_get_buffer(audioio_wavefile_obj_t* self,
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bool single_channel,
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uint8_t channel,
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uint8_t** buffer,
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uint32_t* buffer_length); // length in bytes
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void audioio_wavefile_get_buffer_structure(audioio_wavefile_obj_t* self, bool single_channel,
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bool* single_buffer, bool* samples_signed,
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uint32_t* max_buffer_length, uint8_t* spacing);
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#endif // MICROPY_INCLUDED_SHARED_MODULE_AUDIOIO_WAVEFILE_H
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