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.
32 lines
965 B
C
32 lines
965 B
C
// This file is part of the CircuitPython project: https://circuitpython.org
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//
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// SPDX-FileCopyrightText: Copyright (c) 2021 Artyom Skrobov
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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 "shared-module/synthio/__init__.h"
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typedef struct {
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synthio_synth_t synth;
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mp_buffer_info_t track;
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// invariant: after initial startup, pos always points just after an encoded duration, i.e., at a midi message (or at EOF)
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size_t pos;
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mp_int_t error_location;
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uint32_t tempo;
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} synthio_miditrack_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 synthio_miditrack_reset_buffer(synthio_miditrack_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 synthio_miditrack_get_buffer(synthio_miditrack_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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