Philips Philips
This is early stages of my project, the idea of this project is to be able to mix a guitar with windows sounds in reverse such as instrumental background music or trance music perhaps or maybe another fellow guitarist you may have downloaded from the internet. Microphone or guitar pin is p19 I would use a microphone for drums:) and that it for the moment, the code makes the mbed act as usb speaker that excepts a guitar or microphone input, but with a twist it all in reverse like a guitar reverse effects pedal but only you can mix anything you can get from the internet or any windows sound.
USBDevice/USBAudio/USBAudio.h@0:7610d342c76e, 2012-01-08 (annotated)
- Committer:
- mbed2f
- Date:
- Sun Jan 08 17:28:24 2012 +0000
- Revision:
- 0:7610d342c76e
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| mbed2f | 0:7610d342c76e | 1 | /* Copyright (c) 2010-2011 mbed.org, MIT License |
| mbed2f | 0:7610d342c76e | 2 | * |
| mbed2f | 0:7610d342c76e | 3 | * Permission is hereby granted, free of charge, to any person obtaining a copy of this software |
| mbed2f | 0:7610d342c76e | 4 | * and associated documentation files (the "Software"), to deal in the Software without |
| mbed2f | 0:7610d342c76e | 5 | * restriction, including without limitation the rights to use, copy, modify, merge, publish, |
| mbed2f | 0:7610d342c76e | 6 | * distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the |
| mbed2f | 0:7610d342c76e | 7 | * Software is furnished to do so, subject to the following conditions: |
| mbed2f | 0:7610d342c76e | 8 | * |
| mbed2f | 0:7610d342c76e | 9 | * The above copyright notice and this permission notice shall be included in all copies or |
| mbed2f | 0:7610d342c76e | 10 | * substantial portions of the Software. |
| mbed2f | 0:7610d342c76e | 11 | * |
| mbed2f | 0:7610d342c76e | 12 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING |
| mbed2f | 0:7610d342c76e | 13 | * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| mbed2f | 0:7610d342c76e | 14 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, |
| mbed2f | 0:7610d342c76e | 15 | * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| mbed2f | 0:7610d342c76e | 16 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| mbed2f | 0:7610d342c76e | 17 | */ |
| mbed2f | 0:7610d342c76e | 18 | |
| mbed2f | 0:7610d342c76e | 19 | #ifndef USBAudio_H |
| mbed2f | 0:7610d342c76e | 20 | #define USBAudio_H |
| mbed2f | 0:7610d342c76e | 21 | |
| mbed2f | 0:7610d342c76e | 22 | /* These headers are included for child class. */ |
| mbed2f | 0:7610d342c76e | 23 | #include "USBEndpoints.h" |
| mbed2f | 0:7610d342c76e | 24 | #include "USBDescriptor.h" |
| mbed2f | 0:7610d342c76e | 25 | #include "USBDevice_Types.h" |
| mbed2f | 0:7610d342c76e | 26 | |
| mbed2f | 0:7610d342c76e | 27 | #include "USBDevice.h" |
| mbed2f | 0:7610d342c76e | 28 | |
| mbed2f | 0:7610d342c76e | 29 | |
| mbed2f | 0:7610d342c76e | 30 | /** |
| mbed2f | 0:7610d342c76e | 31 | * USBAudio example |
| mbed2f | 0:7610d342c76e | 32 | * |
| mbed2f | 0:7610d342c76e | 33 | * #include "mbed.h" |
| mbed2f | 0:7610d342c76e | 34 | * #include "USBAudio.h" |
| mbed2f | 0:7610d342c76e | 35 | * |
| mbed2f | 0:7610d342c76e | 36 | * Serial pc(USBTX, USBRX); |
| mbed2f | 0:7610d342c76e | 37 | * |
| mbed2f | 0:7610d342c76e | 38 | * // frequency: 48 kHz |
| mbed2f | 0:7610d342c76e | 39 | * #define FREQ 32000 |
| mbed2f | 0:7610d342c76e | 40 | * |
| mbed2f | 0:7610d342c76e | 41 | * // 1 channel: mono |
| mbed2f | 0:7610d342c76e | 42 | * #define NB_CHA 1 |
| mbed2f | 0:7610d342c76e | 43 | * |
| mbed2f | 0:7610d342c76e | 44 | * // length of an audio packet: each ms, we receive 48 * 16bits ->48 * 2 bytes. as there is one channel, the length will be 48 * 2 * 1 |
| mbed2f | 0:7610d342c76e | 45 | * #define AUDIO_LENGTH_PACKET 32 * 2 * 1 |
| mbed2f | 0:7610d342c76e | 46 | * |
| mbed2f | 0:7610d342c76e | 47 | * // USBAudio |
| mbed2f | 0:7610d342c76e | 48 | * USBAudio audio(FREQ, NB_CHA); |
| mbed2f | 0:7610d342c76e | 49 | * |
| mbed2f | 0:7610d342c76e | 50 | * int main() { |
| mbed2f | 0:7610d342c76e | 51 | * int16_t buf[AUDIO_LENGTH_PACKET/2]; |
| mbed2f | 0:7610d342c76e | 52 | * |
| mbed2f | 0:7610d342c76e | 53 | * while (1) { |
| mbed2f | 0:7610d342c76e | 54 | * // read an audio packet |
| mbed2f | 0:7610d342c76e | 55 | * audio.read((uint8_t *)buf); |
| mbed2f | 0:7610d342c76e | 56 | * |
| mbed2f | 0:7610d342c76e | 57 | * |
| mbed2f | 0:7610d342c76e | 58 | * // print packet received |
| mbed2f | 0:7610d342c76e | 59 | * pc.printf("recv: "); |
| mbed2f | 0:7610d342c76e | 60 | * for(int i = 0; i < AUDIO_LENGTH_PACKET/2; i++) { |
| mbed2f | 0:7610d342c76e | 61 | * pc.printf("%d ", buf[i]); |
| mbed2f | 0:7610d342c76e | 62 | * } |
| mbed2f | 0:7610d342c76e | 63 | * pc.printf("\r\n"); |
| mbed2f | 0:7610d342c76e | 64 | * } |
| mbed2f | 0:7610d342c76e | 65 | * } |
| mbed2f | 0:7610d342c76e | 66 | * @endcode |
| mbed2f | 0:7610d342c76e | 67 | */ |
| mbed2f | 0:7610d342c76e | 68 | class USBAudio: public USBDevice { |
| mbed2f | 0:7610d342c76e | 69 | public: |
| mbed2f | 0:7610d342c76e | 70 | |
| mbed2f | 0:7610d342c76e | 71 | /** |
| mbed2f | 0:7610d342c76e | 72 | * Constructor |
| mbed2f | 0:7610d342c76e | 73 | * |
| mbed2f | 0:7610d342c76e | 74 | * @param frequency frequency in Hz (default: 32000) |
| mbed2f | 0:7610d342c76e | 75 | * @param channel_nb channel number (1 or 2) (default: 1) |
| mbed2f | 0:7610d342c76e | 76 | * @param vendor_id Your vendor_id |
| mbed2f | 0:7610d342c76e | 77 | * @param product_id Your product_id |
| mbed2f | 0:7610d342c76e | 78 | * @param product_release Your preoduct_release |
| mbed2f | 0:7610d342c76e | 79 | */ |
| mbed2f | 0:7610d342c76e | 80 | USBAudio(uint32_t frequency = 32000, uint8_t channel_nb = 1, uint16_t vendor_id = 0x7bb2, uint16_t product_id = 0x1115, uint16_t product_release =0x0104); |
| mbed2f | 0:7610d342c76e | 81 | |
| mbed2f | 0:7610d342c76e | 82 | /** |
| mbed2f | 0:7610d342c76e | 83 | * Get current volume between 0.0 and 1.0 |
| mbed2f | 0:7610d342c76e | 84 | * |
| mbed2f | 0:7610d342c76e | 85 | * @returns volume |
| mbed2f | 0:7610d342c76e | 86 | */ |
| mbed2f | 0:7610d342c76e | 87 | float getVolume(); |
| mbed2f | 0:7610d342c76e | 88 | |
| mbed2f | 0:7610d342c76e | 89 | /** |
| mbed2f | 0:7610d342c76e | 90 | * Read an audio packet. warning: blocking |
| mbed2f | 0:7610d342c76e | 91 | * |
| mbed2f | 0:7610d342c76e | 92 | * @param buf pointer on a buffer which will be filled with an audio packet |
| mbed2f | 0:7610d342c76e | 93 | * |
| mbed2f | 0:7610d342c76e | 94 | * @returns true if successfull |
| mbed2f | 0:7610d342c76e | 95 | */ |
| mbed2f | 0:7610d342c76e | 96 | bool read(uint8_t * buf); |
| mbed2f | 0:7610d342c76e | 97 | |
| mbed2f | 0:7610d342c76e | 98 | /** |
| mbed2f | 0:7610d342c76e | 99 | * Try to read an audio packet. warning: non blocking |
| mbed2f | 0:7610d342c76e | 100 | * |
| mbed2f | 0:7610d342c76e | 101 | * @param buf pointer on a buffer which will be filled if an audio packet is available |
| mbed2f | 0:7610d342c76e | 102 | * |
| mbed2f | 0:7610d342c76e | 103 | * @returns true if successfull |
| mbed2f | 0:7610d342c76e | 104 | */ |
| mbed2f | 0:7610d342c76e | 105 | bool readNB(uint8_t * buf); |
| mbed2f | 0:7610d342c76e | 106 | |
| mbed2f | 0:7610d342c76e | 107 | |
| mbed2f | 0:7610d342c76e | 108 | /** attach a handler to update the volume |
| mbed2f | 0:7610d342c76e | 109 | * |
| mbed2f | 0:7610d342c76e | 110 | * @param function Function to attach |
| mbed2f | 0:7610d342c76e | 111 | * |
| mbed2f | 0:7610d342c76e | 112 | */ |
| mbed2f | 0:7610d342c76e | 113 | void attach(void(*fptr)(void)) { |
| mbed2f | 0:7610d342c76e | 114 | updateVol.attach(fptr); |
| mbed2f | 0:7610d342c76e | 115 | } |
| mbed2f | 0:7610d342c76e | 116 | |
| mbed2f | 0:7610d342c76e | 117 | /** Attach a nonstatic void/void member function to update the volume |
| mbed2f | 0:7610d342c76e | 118 | * |
| mbed2f | 0:7610d342c76e | 119 | * @param tptr Object pointer |
| mbed2f | 0:7610d342c76e | 120 | * @param mptr Member function pointer |
| mbed2f | 0:7610d342c76e | 121 | * |
| mbed2f | 0:7610d342c76e | 122 | */ |
| mbed2f | 0:7610d342c76e | 123 | template<typename T> |
| mbed2f | 0:7610d342c76e | 124 | void attach(T *tptr, void(T::*mptr)(void)) { |
| mbed2f | 0:7610d342c76e | 125 | updateVol.attach(tptr, mptr); |
| mbed2f | 0:7610d342c76e | 126 | } |
| mbed2f | 0:7610d342c76e | 127 | |
| mbed2f | 0:7610d342c76e | 128 | |
| mbed2f | 0:7610d342c76e | 129 | protected: |
| mbed2f | 0:7610d342c76e | 130 | |
| mbed2f | 0:7610d342c76e | 131 | /* |
| mbed2f | 0:7610d342c76e | 132 | * Called by USBDevice layer. Set configuration of the device. |
| mbed2f | 0:7610d342c76e | 133 | * For instance, you can add all endpoints that you need on this function. |
| mbed2f | 0:7610d342c76e | 134 | * |
| mbed2f | 0:7610d342c76e | 135 | * @param configuration Number of the configuration |
| mbed2f | 0:7610d342c76e | 136 | * @returns true if class handles this request |
| mbed2f | 0:7610d342c76e | 137 | */ |
| mbed2f | 0:7610d342c76e | 138 | virtual bool USBCallback_setConfiguration(uint8_t configuration); |
| mbed2f | 0:7610d342c76e | 139 | |
| mbed2f | 0:7610d342c76e | 140 | /* |
| mbed2f | 0:7610d342c76e | 141 | * Called by USBDevice on Endpoint0 request. Warning: Called in ISR context |
| mbed2f | 0:7610d342c76e | 142 | * This is used to handle extensions to standard requests |
| mbed2f | 0:7610d342c76e | 143 | * and class specific requests |
| mbed2f | 0:7610d342c76e | 144 | * |
| mbed2f | 0:7610d342c76e | 145 | * @returns true if class handles this request |
| mbed2f | 0:7610d342c76e | 146 | */ |
| mbed2f | 0:7610d342c76e | 147 | virtual bool USBCallback_request(); |
| mbed2f | 0:7610d342c76e | 148 | |
| mbed2f | 0:7610d342c76e | 149 | /* |
| mbed2f | 0:7610d342c76e | 150 | * Get string product descriptor |
| mbed2f | 0:7610d342c76e | 151 | * |
| mbed2f | 0:7610d342c76e | 152 | * @returns pointer to the string product descriptor |
| mbed2f | 0:7610d342c76e | 153 | */ |
| mbed2f | 0:7610d342c76e | 154 | virtual uint8_t * stringIproductDesc(); |
| mbed2f | 0:7610d342c76e | 155 | |
| mbed2f | 0:7610d342c76e | 156 | /* |
| mbed2f | 0:7610d342c76e | 157 | * Get string interface descriptor |
| mbed2f | 0:7610d342c76e | 158 | * |
| mbed2f | 0:7610d342c76e | 159 | * @returns pointer to the string interface descriptor |
| mbed2f | 0:7610d342c76e | 160 | */ |
| mbed2f | 0:7610d342c76e | 161 | virtual uint8_t * stringIinterfaceDesc(); |
| mbed2f | 0:7610d342c76e | 162 | |
| mbed2f | 0:7610d342c76e | 163 | /* |
| mbed2f | 0:7610d342c76e | 164 | * Get configuration descriptor |
| mbed2f | 0:7610d342c76e | 165 | * |
| mbed2f | 0:7610d342c76e | 166 | * @returns pointer to the configuration descriptor |
| mbed2f | 0:7610d342c76e | 167 | */ |
| mbed2f | 0:7610d342c76e | 168 | virtual uint8_t * configurationDesc(); |
| mbed2f | 0:7610d342c76e | 169 | |
| mbed2f | 0:7610d342c76e | 170 | /* |
| mbed2f | 0:7610d342c76e | 171 | * Called by USBDevice layer. Set interface/alternate of the device. |
| mbed2f | 0:7610d342c76e | 172 | * |
| mbed2f | 0:7610d342c76e | 173 | * @param interface Number of the interface to be configured |
| mbed2f | 0:7610d342c76e | 174 | * @param alternate Number of the alternate to be configured |
| mbed2f | 0:7610d342c76e | 175 | * @returns true if class handles this request |
| mbed2f | 0:7610d342c76e | 176 | */ |
| mbed2f | 0:7610d342c76e | 177 | virtual bool USBCallback_setInterface(uint16_t interface, uint8_t alternate); |
| mbed2f | 0:7610d342c76e | 178 | |
| mbed2f | 0:7610d342c76e | 179 | /* |
| mbed2f | 0:7610d342c76e | 180 | * Called by USBDevice on Endpoint0 request completion |
| mbed2f | 0:7610d342c76e | 181 | * if the 'notify' flag has been set to true. Warning: Called in ISR context |
| mbed2f | 0:7610d342c76e | 182 | * |
| mbed2f | 0:7610d342c76e | 183 | * In this case it is used to indicate that a HID report has |
| mbed2f | 0:7610d342c76e | 184 | * been received from the host on endpoint 0 |
| mbed2f | 0:7610d342c76e | 185 | * |
| mbed2f | 0:7610d342c76e | 186 | * @param buf buffer received on endpoint 0 |
| mbed2f | 0:7610d342c76e | 187 | * @param length length of this buffer |
| mbed2f | 0:7610d342c76e | 188 | */ |
| mbed2f | 0:7610d342c76e | 189 | virtual void USBCallback_requestCompleted(uint8_t * buf, uint16_t length); |
| mbed2f | 0:7610d342c76e | 190 | |
| mbed2f | 0:7610d342c76e | 191 | /* |
| mbed2f | 0:7610d342c76e | 192 | * Callback called on each Start of Frame event |
| mbed2f | 0:7610d342c76e | 193 | */ |
| mbed2f | 0:7610d342c76e | 194 | virtual void SOF(int frameNumber); |
| mbed2f | 0:7610d342c76e | 195 | |
| mbed2f | 0:7610d342c76e | 196 | private: |
| mbed2f | 0:7610d342c76e | 197 | |
| mbed2f | 0:7610d342c76e | 198 | // stream available ? |
| mbed2f | 0:7610d342c76e | 199 | volatile bool available; |
| mbed2f | 0:7610d342c76e | 200 | |
| mbed2f | 0:7610d342c76e | 201 | // FREQ |
| mbed2f | 0:7610d342c76e | 202 | uint32_t FREQ; |
| mbed2f | 0:7610d342c76e | 203 | |
| mbed2f | 0:7610d342c76e | 204 | // size of the maximum packet for the isochronous endpoint |
| mbed2f | 0:7610d342c76e | 205 | uint32_t PACKET_SIZE_ISO; |
| mbed2f | 0:7610d342c76e | 206 | |
| mbed2f | 0:7610d342c76e | 207 | // mono, stereo,... |
| mbed2f | 0:7610d342c76e | 208 | uint8_t channel_nb; |
| mbed2f | 0:7610d342c76e | 209 | |
| mbed2f | 0:7610d342c76e | 210 | // channel config: master, left, right |
| mbed2f | 0:7610d342c76e | 211 | uint8_t channel_config; |
| mbed2f | 0:7610d342c76e | 212 | |
| mbed2f | 0:7610d342c76e | 213 | // mute state |
| mbed2f | 0:7610d342c76e | 214 | uint8_t mute; |
| mbed2f | 0:7610d342c76e | 215 | |
| mbed2f | 0:7610d342c76e | 216 | // Volume Current Value |
| mbed2f | 0:7610d342c76e | 217 | uint16_t volCur; |
| mbed2f | 0:7610d342c76e | 218 | |
| mbed2f | 0:7610d342c76e | 219 | // Volume Minimum Value |
| mbed2f | 0:7610d342c76e | 220 | uint16_t volMin; |
| mbed2f | 0:7610d342c76e | 221 | |
| mbed2f | 0:7610d342c76e | 222 | // Volume Maximum Value |
| mbed2f | 0:7610d342c76e | 223 | uint16_t volMax; |
| mbed2f | 0:7610d342c76e | 224 | |
| mbed2f | 0:7610d342c76e | 225 | // Volume Resolution |
| mbed2f | 0:7610d342c76e | 226 | uint16_t volRes; |
| mbed2f | 0:7610d342c76e | 227 | |
| mbed2f | 0:7610d342c76e | 228 | // Buffer containing one audio packet |
| mbed2f | 0:7610d342c76e | 229 | uint8_t * buf_stream; |
| mbed2f | 0:7610d342c76e | 230 | |
| mbed2f | 0:7610d342c76e | 231 | // callback to update volume |
| mbed2f | 0:7610d342c76e | 232 | FunctionPointer updateVol; |
| mbed2f | 0:7610d342c76e | 233 | |
| mbed2f | 0:7610d342c76e | 234 | // boolean showing that the SOF handler has been called. Useful for readNB. |
| mbed2f | 0:7610d342c76e | 235 | volatile bool SOF_handler; |
| mbed2f | 0:7610d342c76e | 236 | |
| mbed2f | 0:7610d342c76e | 237 | }; |
| mbed2f | 0:7610d342c76e | 238 | |
| mbed2f | 0:7610d342c76e | 239 | #endif |