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.
56 lines
1.5 KiB
C
56 lines
1.5 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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// SPDX-FileCopyrightText: Copyright (c) 2019 Jeff Epler for Adafruit Industries
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//
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// SPDX-License-Identifier: MIT
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#pragma once
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#include "supervisor/background_callback.h"
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#include "extmod/vfs_fat.h"
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#include "py/obj.h"
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#include "shared-module/audiocore/__init__.h"
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typedef struct {
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uint8_t *buf;
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mp_int_t size;
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mp_int_t read_off;
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mp_int_t write_off;
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} mp3_input_buffer_t;
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typedef struct {
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audiosample_base_t base;
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struct _MP3DecInfo *decoder;
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background_callback_t inbuf_fill_cb;
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mp3_input_buffer_t inbuf;
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int16_t *pcm_buffer[2];
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uint32_t len;
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mp_obj_t stream;
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uint8_t buffer_index;
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bool eof;
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bool block_ok;
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mp_obj_t settimeout_args[3];
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int8_t other_channel;
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int8_t other_buffer_index;
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uint32_t samples_decoded;
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} audiomp3_mp3file_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 audiomp3_mp3file_reset_buffer(audiomp3_mp3file_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 audiomp3_mp3file_get_buffer(audiomp3_mp3file_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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float audiomp3_mp3file_get_rms_level(audiomp3_mp3file_obj_t *self);
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uint32_t common_hal_audiomp3_mp3file_get_samples_decoded(audiomp3_mp3file_obj_t *self);
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