EasyDec_WavCnv2ch.h

00001 /* mbed EasyDec_WavCnv2ch Library
00002  * Copyright (C) 2017 dkato
00003  *
00004  * Licensed under the Apache License, Version 2.0 (the "License");
00005  * you may not use this file except in compliance with the License.
00006  * You may obtain a copy of the License at
00007  *
00008  *     http://www.apache.org/licenses/LICENSE-2.0
00009  *
00010  * Unless required by applicable law or agreed to in writing, software
00011  * distributed under the License is distributed on an "AS IS" BASIS,
00012  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00013  * See the License for the specific language governing permissions and
00014  * limitations under the License.
00015  */
00016 
00017 /**************************************************************************//**
00018 * @file          EasyDec_WavCnv2ch.h
00019 * @brief         wav
00020 ******************************************************************************/
00021 #ifndef __EASY_DEC_WAV_CNV_2CH_H__
00022 #define __EASY_DEC_WAV_CNV_2CH_H__
00023 
00024 #include "EasyDecoder.h"
00025 
00026 /** A class to communicate a EasyDec_WavCnv2ch
00027  *
00028  */
00029 class EasyDec_WavCnv2ch : public EasyDecoder {
00030 public:
00031 
00032     static inline EasyDecoder* inst() { return new EasyDec_WavCnv2ch; }
00033 
00034     /** analyze header
00035      *
00036      * @param p_title title tag buffer
00037      * @param p_artist artist tag buffer
00038      * @param p_album album tag buffer
00039      * @param tag_size tag buffer size
00040      * @param fp file pointer
00041      * @return true = success, false = failure
00042      */
00043     virtual bool AnalyzeHeder(char* p_title, char* p_artist, char* p_album, uint16_t tag_size, FILE* fp);
00044 
00045     /** get next data
00046      *
00047      * @param buf data buffer address
00048      * @param len data buffer length
00049      * @return get data size
00050      */
00051     virtual size_t GetNextData(void *buf, size_t len);
00052 
00053     /** get channel
00054      *
00055      * @return channel
00056      */
00057     virtual uint16_t GetChannel();
00058 
00059     /** get block size
00060      *
00061      * @return block size
00062      */
00063     virtual uint16_t GetBlockSize();
00064 
00065     /** get sampling rate
00066      *
00067      * @return sampling rate
00068      */
00069     virtual uint32_t GetSamplingRate();
00070 
00071 private:
00072     FILE * wav_fp;
00073     uint32_t music_data_size;
00074     uint32_t music_data_index;
00075     uint16_t channel;
00076     uint16_t block_size;
00077     uint32_t sampling_rate;
00078 };
00079 
00080 #endif