WavPlayer.h

00001 /**
00002 * @author Giles Barton-Owen
00003 *
00004 * @section LICENSE
00005 *
00006 * Copyright (c) 2012 mbed
00007 *
00008 * Permission is hereby granted, free of charge, to any person obtaining a copy
00009 * of this software and associated documentation files (the "Software"), to deal
00010 * in the Software without restriction, including without limitation the rights
00011 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00012 * copies of the Software, and to permit persons to whom the Software is
00013 * furnished to do so, subject to the following conditions:
00014 *
00015 * The above copyright notice and this permission notice shall be included in
00016 * all copies or substantial portions of the Software.
00017 *
00018 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00019 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00020 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00021 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00022 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00023 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00024 * THE SOFTWARE.
00025 *
00026 * @section DESCRIPTION
00027 *    A WAV player library for the TLV320 and the LPC1768's built in I2S peripheral
00028 *
00029 */ 
00030 
00031 #ifndef WAVPLAYER_H
00032 #define WAVPLAYER_H
00033 
00034 #include "mbed.h"
00035 #include "WavPlayerConfig.h"
00036 #include "RingBuffer.h"
00037 #include "TLV320.h"
00038 #include "I2S.h"
00039 
00040 /** A class to play WAV files from a file system, tested with USB
00041  *
00042  * Example (note, this has requires the USB MSC library to be imported):
00043  * @code
00044  *
00045  * #include "mbed.h"
00046  * #include "WavPlayer.h"
00047  * #include "MSCFileSystem.h"
00048  * 
00049  * MSCFileSystem msc("msc"); // Mount flash drive under the name "msc"
00050  * WavPlayer player;
00051  * 
00052  * int main() {
00053  *    FILE *fp = fopen("/msc/test.wav", "r");  // Open "out.txt" on the local file system for writing
00054  *     player.open(&fp);
00055  *     player.play();
00056  *     fclose(fp);
00057  * }
00058  * @endcode
00059  */
00060 
00061 
00062 class WavPlayer
00063 {
00064 public:
00065       /** Create a WavPlayer instance
00066      * 
00067      */
00068     WavPlayer();
00069     
00070     /** Create a WavPlayer instance
00071      * 
00072      * @param fpp A pointer to a file pointer to read out of
00073      */
00074     WavPlayer(FILE **fpp);
00075     
00076     /** Set the file to read out of
00077      * 
00078      * @param fpp A pointer to a file pointer to read out of
00079      */
00080     void open(FILE **fpp);
00081     
00082     /** Extract the header infomation, automatically called by open
00083      */
00084     int getConfig();
00085     
00086     /** Play the entire file. Blocking
00087      */
00088     float play();
00089     
00090     /** Play the file for a certain number of seconds. Blocking
00091      *
00092      * @param time The number of seconds to play the file for.
00093      */
00094     float play(float time);
00095     
00096     /** Play the file for a certain number of seconds, from a certain start point. Blocking
00097      *
00098      * @param start        The start time
00099      * @param timefor     The number of seconds to play the file for.
00100      */
00101     float play(float start, float timefor);
00102 
00103 
00104 
00105 private:
00106     WavPlayerConfig config;
00107     FILE ** filepp;
00108     RingBuffer rbuf;
00109 
00110     I2S i2s;
00111     TLV320 codec;
00112     static void i2sisr();
00113     void i2sisr_();
00114     static WavPlayer* instance;
00115 
00116     int fseekread(FILE *fp, char* str, int offset, int len);
00117     uint32_t getu32(char str[], int len);
00118     uint16_t getu16(char str[], int len);
00119     int32_t get32(char str[], int len);
00120     int16_t get16(char str[], int len);
00121     uint32_t fsru32(FILE *fp, int offset, int len = 4);
00122     uint16_t fsru16(FILE *fp, int offset, int len = 2);
00123     void clear(char* str, int len);
00124 
00125     int findChunk(FILE *fp, char* match, int len, int fileSize, int startOffset = 12);
00126     int findChunk(FILE *fp, char* match, int len, int startOffset = 12);
00127     void fgets_m(char* str, int num, FILE* fp);
00128 
00129     float sine_gen(int16_t* buf, int len, float div, float phase);
00130 
00131     bool flag_vol;
00132     double volume;
00133 
00134     bool stereo;
00135 
00136     bool flag_play;
00137 
00138     Timer timer;
00139     
00140     int isr_underrun;
00141 
00142     float read_time;
00143     int read_time_div;
00144 
00145     float isr_time;
00146     int isr_time_div;
00147     
00148     float current_time;
00149     
00150     int slow_count;
00151 
00152     //Timer isrtimer;
00153 
00154     //DigitalOut ext_flag;
00155     //DigitalOut run_flag;
00156 
00157 };
00158 
00159 #endif