68 lines
2.3 KiB
C
68 lines
2.3 KiB
C
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/****************************************************************************
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* apps/system/nxrecorder/nxrecorder_amr.c
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <sys/types.h>
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#include <stdio.h>
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#include <unistd.h>
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#include <nuttx/audio/audio.h>
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#include "system/nxrecorder.h"
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/****************************************************************************
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* Private Type Declarations
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****************************************************************************/
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static const uint8_t AMR_NB[6] = "#!AMR\n";
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static const uint8_t AMR_WB[9] = "#!AMR-WB\n";
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/****************************************************************************
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* Public Functions
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****************************************************************************/
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/****************************************************************************
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* Name: nxrecorder_record_amr
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*
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* nxrecorder_record_amr() add amr file header
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*
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****************************************************************************/
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int nxrecorder_write_amr(int fd, uint32_t samplerate,
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uint8_t chans, uint8_t bps)
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{
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const uint8_t *data;
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int size;
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if (samplerate != 8000 && samplerate != 16000)
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{
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return -EINVAL;
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}
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data = samplerate == 16000 ? &AMR_WB[0] : &AMR_NB[0];
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size = samplerate == 16000 ? sizeof(AMR_WB) : sizeof(AMR_NB);
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return write(fd, data, size);
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}
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