1 /* 2 * Copyright (c) 2019-2025 Allwinner Technology Co., Ltd. ALL rights reserved. 3 * 4 * Allwinner is a trademark of Allwinner Technology Co.,Ltd., registered in 5 * the the people's Republic of China and other countries. 6 * All Allwinner Technology Co.,Ltd. trademarks are used with permission. 7 * 8 * DISCLAIMER 9 * THIRD PARTY LICENCES MAY BE REQUIRED TO IMPLEMENT THE SOLUTION/PRODUCT. 10 * IF YOU NEED TO INTEGRATE THIRD PARTY’S TECHNOLOGY (SONY, DTS, DOLBY, AVS OR MPEGLA, ETC.) 11 * IN ALLWINNERS’SDK OR PRODUCTS, YOU SHALL BE SOLELY RESPONSIBLE TO OBTAIN 12 * ALL APPROPRIATELY REQUIRED THIRD PARTY LICENCES. 13 * ALLWINNER SHALL HAVE NO WARRANTY, INDEMNITY OR OTHER OBLIGATIONS WITH RESPECT TO MATTERS 14 * COVERED UNDER ANY REQUIRED THIRD PARTY LICENSE. 15 * YOU ARE SOLELY RESPONSIBLE FOR YOUR USAGE OF THIRD PARTY’S TECHNOLOGY. 16 * 17 * 18 * THIS SOFTWARE IS PROVIDED BY ALLWINNER"AS IS" AND TO THE MAXIMUM EXTENT 19 * PERMITTED BY LAW, ALLWINNER EXPRESSLY DISCLAIMS ALL WARRANTIES OF ANY KIND, 20 * WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING WITHOUT LIMITATION REGARDING 21 * THE TITLE, NON-INFRINGEMENT, ACCURACY, CONDITION, COMPLETENESS, PERFORMANCE 22 * OR MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. 23 * IN NO EVENT SHALL ALLWINNER BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 24 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 26 * LOSS OF USE, DATA, OR PROFITS, OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, 28 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 29 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED 30 * OF THE POSSIBILITY OF SUCH DAMAGE. 31 */ 32 #ifndef __WAV_PARSER_H 33 #define __WAV_PARSER_H 34 35 #include <aw-alsa-lib/pcm.h> 36 37 #ifdef __cplusplus 38 39 extern "C" { 40 #endif 41 42 /* define default endianness */ 43 #ifndef __LITTLE_ENDIAN 44 #define __LITTLE_ENDIAN 3456 45 #endif 46 47 #ifndef __BIG_ENDIAN 48 #define __BIG_ENDIAN 6543 49 #endif 50 51 #ifndef __BYTE_ORDER 52 #define __BYTE_ORDER __LITTLE_ENDIAN 53 #endif 54 55 #if __BYTE_ORDER == __LITTLE_ENDIAN 56 #define COMPOSE_ID(a,b,c,d) ((a) | ((b)<<8) | ((c)<<16) | ((d)<<24)) 57 #define LE_SHORT(v) (v) 58 #define LE_INT(v) (v) 59 #define BE_SHORT(v) bswap_16(v) 60 #define BE_INT(v) bswap_32(v) 61 #elif __BYTE_ORDER == __BIG_ENDIAN 62 #define COMPOSE_ID(a,b,c,d) ((d) | ((c)<<8) | ((b)<<16) | ((a)<<24)) 63 #define LE_SHORT(v) bswap_16(v) 64 #define LE_INT(v) bswap_32(v) 65 #define BE_SHORT(v) (v) 66 #define BE_INT(v) (v) 67 #else 68 #error "Wrong endian" 69 #endif 70 71 #define WAV_RIFF COMPOSE_ID('R','I','F','F') 72 #define WAV_RIFX COMPOSE_ID('R','I','F','X') 73 #define WAV_WAVE COMPOSE_ID('W','A','V','E') 74 #define WAV_FMT COMPOSE_ID('f','m','t',' ') 75 #define WAV_DATA COMPOSE_ID('d','a','t','a') 76 77 #define WAV_FMT_PCM 0x0001 78 #define WAV_FMT_IEEE_FLOAT 0x0003 79 80 81 typedef struct { 82 unsigned int riffType; //4byte,资源交换文件标志:RIFF 83 unsigned int riffSize; //4byte,从下个地址到文件结尾的总字节数 84 unsigned int waveType; //4byte,wav文件标志:WAVE 85 unsigned int formatType; //4byte,波形文件标志:FMT(最后一位空格符)最后一位空格符 86 unsigned int formatSize; //4byte,音频属性(compressionCode,numChannels,sampleRate,bytesPerSecond,blockAlign,bitsPerSample)所占字节数 87 unsigned short compressionCode; //2byte,格式种类(1-线性pcm-WAVE_FORMAT_PCM,WAVEFORMAT_ADPCM) 88 unsigned short numChannels; //2byte,通道数 89 unsigned int sampleRate; //4byte,采样率 90 unsigned int bytesPerSecond; //4byte,传输速率 91 unsigned short blockAlign; //2byte,数据块的对齐，即DATA数据块长度 92 unsigned short bitsPerSample; //2byte,采样精度-PCM位宽 93 unsigned int dataType; //4byte,数据标志:data 94 unsigned int dataSize; //4byte,从下个地址到文件结尾的总字节数，即除了wav header以外的pcm data length 95 } wav_header_t; 96 97 typedef struct { 98 unsigned int rate; 99 snd_pcm_format_t format; 100 unsigned int channels; 101 } wav_hw_params_t; 102 103 int check_wav_header(wav_header_t *header, wav_hw_params_t *hwparams); 104 void create_wav(wav_header_t *header, unsigned int format, unsigned int rate, unsigned int channels); 105 void resize_wav(wav_header_t *header, unsigned int size); 106 107 #ifdef __cplusplus 108 }; // extern "C" 109 #endif 110 #endif 111