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68 lines
2.7 KiB
C
68 lines
2.7 KiB
C
/*
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* Copyright (C) 2022 BlueKitchen GmbH
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the copyright holders nor the names of
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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* 4. Any redistribution, use, or modification is done solely for
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* personal benefit and not for any commercial purpose or for
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* monetary gain.
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*
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* THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL MATTHIAS
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* RINGWALD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
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* THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* Please inquire about commercial licensing options at
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* contact@bluekitchen-gmbh.com
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*
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*/
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// *****************************************************************************
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//
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// LC3 Interface
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//
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// *****************************************************************************
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#define BTSTACK_FILE__ "btstack_lc3.c"
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#include "btstack_lc3.h"
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#include "btstack_debug.h"
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uint16_t btstack_lc3_frame_duration_in_us(btstack_lc3_frame_duration_t frame_duration){
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switch (frame_duration){
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case BTSTACK_LC3_FRAME_DURATION_7500US:
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return 7500;
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case BTSTACK_LC3_FRAME_DURATION_10000US:
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return 10000;
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default:
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return 0;
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}
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}
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uint16_t btstack_lc3_samples_per_frame(uint32_t sample_rate, btstack_lc3_frame_duration_t frame_duration){
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// 44.1 kHz uses longer iso interval and same number of samples as 48 khz
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if (sample_rate == 44100){
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sample_rate = 48000;
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}
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// assume sample rate is x 1000 hz
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return (sample_rate / 1000) * (btstack_lc3_frame_duration_in_us(frame_duration) / 100) / 10;
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}
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