1 /* 2 * Copyright (C) 2016 BlueKitchen GmbH 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the copyright holders nor the names of 14 * contributors may be used to endorse or promote products derived 15 * from this software without specific prior written permission. 16 * 4. Any redistribution, use, or modification is done solely for 17 * personal benefit and not for any commercial purpose or for 18 * monetary gain. 19 * 20 * THIS SOFTWARE IS PROVIDED BY BLUEKITCHEN GMBH AND CONTRIBUTORS 21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 23 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL BLUEKITCHEN 24 * GMBH OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 25 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 26 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 27 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 28 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 29 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF 30 * THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * Please inquire about commercial licensing options at 34 * [email protected] 35 * 36 */ 37 38 #ifndef WAV_UIL_H 39 #define WAV_UIL_H 40 41 #include <stdint.h> 42 #include <stdio.h> 43 #include <stdlib.h> 44 #include <string.h> 45 #include <fcntl.h> 46 #include <unistd.h> 47 48 #if defined __cplusplus 49 extern "C" { 50 #endif 51 52 // return 0 if ok 53 54 /** 55 * Open singleton wav writer 56 * @return 0 if ok 57 */ 58 int wav_writer_open(const char * filepath, int num_channels, int sampling_frequency); 59 /** 60 * Write Int8 samples 61 * @return 0 if ok 62 */ 63 int wav_writer_write_int8(int num_samples, int8_t * data); 64 /** 65 * Write Int16 samples (host endianess) 66 * @return 0 if ok 67 */ 68 int wav_writer_write_int16(int num_samples, int16_t * data); 69 /** 70 * Write Little Endian Int16 samples 71 * @return 0 if ok 72 */ 73 int wav_writer_write_le_int16(int num_samples, int16_t * data); 74 /** 75 * Close wav writer and update wav file header 76 * @return 0 if ok 77 */ 78 int wav_writer_close(void); 79 80 81 /** 82 * Open singleton wav reader 83 * @return 0 if ok 84 */ 85 int wav_reader_open(const char * filepath); 86 87 /** 88 * Get number of channels 89 */ 90 uint8_t wav_reader_get_num_channels(void); 91 92 /** 93 * Get sampling rate 94 */ 95 uint32_t wav_reader_get_sampling_rate(void); 96 97 /** 98 * Read Int8 samples 99 * @return 0 if ok 100 */ 101 int wav_reader_read_int8(int num_samples, int8_t * data); 102 /** 103 * Read Int16 samples (host endianess) 104 * @return 0 if ok 105 */ 106 int wav_reader_read_int16(int num_samples, int16_t * data); 107 /** 108 * Close war reader 109 * @return 0 if ok 110 */ 111 int wav_reader_close(void); 112 113 #if defined __cplusplus 114 } 115 #endif 116 117 #endif // WAV_UTIL_H 118