Giles Barton-Owen / WavPlayer

A library which allows the playing of Wav files using the TLV320

Dependents:   RSALB_hbridge_helloworld RSALB_lobster WavPlayer_test AudioCODEC_HelloWorld

WavPlayer.h@3:a7380cfc1987, 2012-09-21 (annotated)

Committer:
p07gbar
Date:
Fri Sep 21 14:24:00 2012 +0000
Revision:
3:a7380cfc1987
Parent:
0:3695886f3495 
Minor fix

Who changed what in which revision?

UserRevisionLine numberNew contents of line
p07gbar 0:3695886f3495 1 /**
p07gbar 0:3695886f3495 2 * @author Giles Barton-Owen
p07gbar 0:3695886f3495 3 *
p07gbar 0:3695886f3495 4 * @section LICENSE
p07gbar 0:3695886f3495 5 *
p07gbar 0:3695886f3495 6 * Copyright (c) 2012 mbed
p07gbar 0:3695886f3495 7 *
p07gbar 0:3695886f3495 8 * Permission is hereby granted, free of charge, to any person obtaining a copy
p07gbar 0:3695886f3495 9 * of this software and associated documentation files (the "Software"), to deal
p07gbar 0:3695886f3495 10 * in the Software without restriction, including without limitation the rights
p07gbar 0:3695886f3495 11 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
p07gbar 0:3695886f3495 12 * copies of the Software, and to permit persons to whom the Software is
p07gbar 0:3695886f3495 13 * furnished to do so, subject to the following conditions:
p07gbar 0:3695886f3495 14 *
p07gbar 0:3695886f3495 15 * The above copyright notice and this permission notice shall be included in
p07gbar 0:3695886f3495 16 * all copies or substantial portions of the Software.
p07gbar 0:3695886f3495 17 *
p07gbar 0:3695886f3495 18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
p07gbar 0:3695886f3495 19 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
p07gbar 0:3695886f3495 20 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
p07gbar 0:3695886f3495 21 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
p07gbar 0:3695886f3495 22 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
p07gbar 0:3695886f3495 23 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
p07gbar 0:3695886f3495 24 * THE SOFTWARE.
p07gbar 0:3695886f3495 25 *
p07gbar 0:3695886f3495 26 * @section DESCRIPTION
p07gbar 0:3695886f3495 27 * A WAV player library for the TLV320 and the LPC1768's built in I2S peripheral
p07gbar 0:3695886f3495 28 *
p07gbar 0:3695886f3495 29 */
p07gbar 0:3695886f3495 30
p07gbar 0:3695886f3495 31 #ifndef WAVPLAYER_H
p07gbar 0:3695886f3495 32 #define WAVPLAYER_H
p07gbar 0:3695886f3495 33
p07gbar 0:3695886f3495 34 #include "mbed.h"
p07gbar 0:3695886f3495 35 #include "WavPlayerConfig.h"
p07gbar 0:3695886f3495 36 #include "RingBuffer.h"
p07gbar 0:3695886f3495 37 #include "TLV320.h"
p07gbar 0:3695886f3495 38 #include "I2S.h"
p07gbar 0:3695886f3495 39
p07gbar 0:3695886f3495 40 /** A class to play WAV files from a file system, tested with USB
p07gbar 0:3695886f3495 41 *
p07gbar 0:3695886f3495 42 * Example (note, this has requires the USB MSC library to be imported):
p07gbar 0:3695886f3495 43 * @code
p07gbar 0:3695886f3495 44 *
p07gbar 0:3695886f3495 45 * #include "mbed.h"
p07gbar 0:3695886f3495 46 * #include "WavPlayer.h"
p07gbar 0:3695886f3495 47 * #include "MSCFileSystem.h"
p07gbar 0:3695886f3495 48 *
p07gbar 0:3695886f3495 49 * MSCFileSystem msc("msc"); // Mount flash drive under the name "msc"
p07gbar 0:3695886f3495 50 * WavPlayer player;
p07gbar 0:3695886f3495 51 *
p07gbar 0:3695886f3495 52 * int main() {
p07gbar 0:3695886f3495 53 * FILE *fp = fopen("/msc/test.wav", "r"); // Open "out.txt" on the local file system for writing
p07gbar 0:3695886f3495 54 * player.open(&fp);
p07gbar 0:3695886f3495 55 * player.play();
p07gbar 0:3695886f3495 56 * fclose(fp);
p07gbar 0:3695886f3495 57 * }
p07gbar 0:3695886f3495 58 * @endcode
p07gbar 0:3695886f3495 59 */
p07gbar 0:3695886f3495 60
p07gbar 0:3695886f3495 61
p07gbar 0:3695886f3495 62 class WavPlayer
p07gbar 0:3695886f3495 63 {
p07gbar 0:3695886f3495 64 public:
p07gbar 0:3695886f3495 65 /** Create a WavPlayer instance
p07gbar 0:3695886f3495 66 *
p07gbar 0:3695886f3495 67 */
p07gbar 0:3695886f3495 68 WavPlayer();
p07gbar 0:3695886f3495 69
p07gbar 0:3695886f3495 70 /** Create a WavPlayer instance
p07gbar 0:3695886f3495 71 *
p07gbar 0:3695886f3495 72 * @param fpp A pointer to a file pointer to read out of
p07gbar 0:3695886f3495 73 */
p07gbar 0:3695886f3495 74 WavPlayer(FILE **fpp);
p07gbar 0:3695886f3495 75
p07gbar 0:3695886f3495 76 /** Set the file to read out of
p07gbar 0:3695886f3495 77 *
p07gbar 0:3695886f3495 78 * @param fpp A pointer to a file pointer to read out of
p07gbar 0:3695886f3495 79 */
p07gbar 0:3695886f3495 80 void open(FILE **fpp);
p07gbar 0:3695886f3495 81
p07gbar 0:3695886f3495 82 /** Extract the header infomation, automatically called by open
p07gbar 0:3695886f3495 83 */
p07gbar 0:3695886f3495 84 int getConfig();
p07gbar 0:3695886f3495 85
p07gbar 0:3695886f3495 86 /** Play the entire file. Blocking
p07gbar 0:3695886f3495 87 */
p07gbar 0:3695886f3495 88 float play();
p07gbar 0:3695886f3495 89
p07gbar 0:3695886f3495 90 /** Play the file for a certain number of seconds. Blocking
p07gbar 0:3695886f3495 91 *
p07gbar 0:3695886f3495 92 * @param time The number of seconds to play the file for.
p07gbar 0:3695886f3495 93 */
p07gbar 0:3695886f3495 94 float play(float time);
p07gbar 0:3695886f3495 95
p07gbar 0:3695886f3495 96 /** Play the file for a certain number of seconds, from a certain start point. Blocking
p07gbar 0:3695886f3495 97 *
p07gbar 0:3695886f3495 98 * @param start The start time
p07gbar 0:3695886f3495 99 * @param timefor The number of seconds to play the file for.
p07gbar 0:3695886f3495 100 */
p07gbar 0:3695886f3495 101 float play(float start, float timefor);
p07gbar 0:3695886f3495 102
p07gbar 0:3695886f3495 103
p07gbar 0:3695886f3495 104
p07gbar 0:3695886f3495 105 private:
p07gbar 0:3695886f3495 106 WavPlayerConfig config;
p07gbar 0:3695886f3495 107 FILE ** filepp;
p07gbar 0:3695886f3495 108 RingBuffer rbuf;
p07gbar 0:3695886f3495 109
p07gbar 0:3695886f3495 110 I2S i2s;
p07gbar 0:3695886f3495 111 TLV320 codec;
p07gbar 0:3695886f3495 112 static void i2sisr();
p07gbar 0:3695886f3495 113 void i2sisr_();
p07gbar 0:3695886f3495 114 static WavPlayer* instance;
p07gbar 0:3695886f3495 115
p07gbar 0:3695886f3495 116 int fseekread(FILE *fp, char* str, int offset, int len);
p07gbar 0:3695886f3495 117 uint32_t getu32(char str[], int len);
p07gbar 0:3695886f3495 118 uint16_t getu16(char str[], int len);
p07gbar 0:3695886f3495 119 int32_t get32(char str[], int len);
p07gbar 0:3695886f3495 120 int16_t get16(char str[], int len);
p07gbar 0:3695886f3495 121 uint32_t fsru32(FILE *fp, int offset, int len = 4);
p07gbar 0:3695886f3495 122 uint16_t fsru16(FILE *fp, int offset, int len = 2);
p07gbar 0:3695886f3495 123 void clear(char* str, int len);
p07gbar 0:3695886f3495 124
p07gbar 0:3695886f3495 125 int findChunk(FILE *fp, char* match, int len, int fileSize, int startOffset = 12);
p07gbar 0:3695886f3495 126 int findChunk(FILE *fp, char* match, int len, int startOffset = 12);
p07gbar 0:3695886f3495 127 void fgets_m(char* str, int num, FILE* fp);
p07gbar 0:3695886f3495 128
p07gbar 0:3695886f3495 129 float sine_gen(int16_t* buf, int len, float div, float phase);
p07gbar 0:3695886f3495 130
p07gbar 0:3695886f3495 131 bool flag_vol;
p07gbar 0:3695886f3495 132 double volume;
p07gbar 0:3695886f3495 133
p07gbar 0:3695886f3495 134 bool stereo;
p07gbar 0:3695886f3495 135
p07gbar 0:3695886f3495 136 bool flag_play;
p07gbar 0:3695886f3495 137
p07gbar 0:3695886f3495 138 Timer timer;
p07gbar 0:3695886f3495 139
p07gbar 0:3695886f3495 140 int isr_underrun;
p07gbar 0:3695886f3495 141
p07gbar 0:3695886f3495 142 float read_time;
p07gbar 0:3695886f3495 143 int read_time_div;
p07gbar 0:3695886f3495 144
p07gbar 0:3695886f3495 145 float isr_time;
p07gbar 0:3695886f3495 146 int isr_time_div;
p07gbar 0:3695886f3495 147
p07gbar 0:3695886f3495 148 float current_time;
p07gbar 0:3695886f3495 149
p07gbar 0:3695886f3495 150 int slow_count;
p07gbar 0:3695886f3495 151
p07gbar 0:3695886f3495 152 //Timer isrtimer;
p07gbar 0:3695886f3495 153
p07gbar 0:3695886f3495 154 //DigitalOut ext_flag;
p07gbar 0:3695886f3495 155 //DigitalOut run_flag;
p07gbar 0:3695886f3495 156
p07gbar 0:3695886f3495 157 };
p07gbar 0:3695886f3495 158
p07gbar 0:3695886f3495 159 #endif