Jeff Epler
e15eba0d33
By placing certain fields in a fixed location in all sample types, code can be reduced & reused. For instance, the same property object can be used for every sample type's `sample_rate` property. The sample proto functions like `sample_rate` become superfluous since once an object is verified to support the audiosample protocol, direct access to the fields in the base object is possible.
39 lines
1.1 KiB
C
39 lines
1.1 KiB
C
// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2018 Scott Shawcroft
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//
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "py/obj.h"
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#include "py/objtuple.h"
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#include "shared-module/audiocore/__init__.h"
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typedef struct {
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audiosample_base_t base;
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uint32_t *first_buffer;
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uint32_t *second_buffer;
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uint32_t len; // in words
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bool use_first_buffer;
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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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uint8_t voice_count;
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mp_obj_tuple_t *voice_tuple;
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mp_obj_t voice[];
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} audiomixer_mixer_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 audiomixer_mixer_reset_buffer(audiomixer_mixer_obj_t *self,
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bool single_channel_output,
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uint8_t channel);
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audioio_get_buffer_result_t audiomixer_mixer_get_buffer(audiomixer_mixer_obj_t *self,
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bool single_channel_output,
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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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