LUFA/Drivers/USB/Class/Device/Audio.c

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2009.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2009  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, and distribute this software
  13   and its documentation for any purpose and without fee is hereby
  14   granted, provided that the above copyright notice appear in all
  15   copies and that both that the copyright notice and this
  16   permission notice and warranty disclaimer appear in supporting
  17   documentation, and that the name of the author not be used in
  18   advertising or publicity pertaining to distribution of the
  19   software without specific, written prior permission.
  20
  21   The author disclaim all warranties with regard to this
  22   software, including all implied warranties of merchantability
  23   and fitness.  In no event shall the author be liable for any
  24   special, indirect or consequential damages or any damages
  25   whatsoever resulting from loss of use, data or profits, whether
  26   in an action of contract, negligence or other tortious action,
  27   arising out of or in connection with the use or performance of
  28   this software.
  29 */
  30
  31 #include "../../HighLevel/USBMode.h"
  32 #if defined(USB_CAN_BE_DEVICE)
  33
  34 #include "Audio.h"
  35
  36 void Audio_Device_ProcessControlPacket(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
  37 {
  38         if (!(Endpoint_IsSETUPReceived()))
  39           return;
  40
  41         if (USB_ControlRequest.wIndex != AudioInterfaceInfo->Config.StreamingInterfaceNumber)
  42           return;
  43
  44         switch (USB_ControlRequest.bRequest)
  45         {
  46                 case REQ_SetInterface:
  47                         if (USB_ControlRequest.bmRequestType == (REQDIR_HOSTTODEVICE | REQTYPE_STANDARD | REQREC_INTERFACE))
  48                         {
  49                                 Endpoint_ClearSETUP();
  50
  51                                 AudioInterfaceInfo->State.InterfaceEnabled = (USB_ControlRequest.wValue != 0);
  52
  53                                 Endpoint_ClearStatusStage();
  54                         }
  55
  56                         break;
  57         }
  58 }
  59
  60 bool Audio_Device_ConfigureEndpoints(USB_ClassInfo_Audio_Device_t* AudioInterfaceInfo)
  61 {
  62         if (AudioInterfaceInfo->Config.DataINEndpointNumber)
  63         {
  64                 if (!(Endpoint_ConfigureEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber, EP_TYPE_ISOCHRONOUS,
  65                                                                                  ENDPOINT_DIR_IN, AudioInterfaceInfo->Config.DataINEndpointSize,
  66                                                                                  ENDPOINT_BANK_DOUBLE)))
  67                 {
  68                         return false;
  69                 }
  70         }
  71
  72         if (AudioInterfaceInfo->Config.DataOUTEndpointNumber)
  73         {
  74                 if (!(Endpoint_ConfigureEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber, EP_TYPE_ISOCHRONOUS,
  75                                                                                  ENDPOINT_DIR_OUT, AudioInterfaceInfo->Config.DataOUTEndpointSize,
  76                                                                                  ENDPOINT_BANK_DOUBLE)))
  77                 {
  78                         return false;
  79                 }
  80         }
  81
  82         return true;
  83 }
  84
  85 void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
  86 {
  87
  88 }
  89
  90 int8_t Audio_Device_ReadSample8(void)
  91 {
  92         int8_t Sample;
  93
  94         Sample = Endpoint_Read_Byte();
  95
  96         if (!(Endpoint_IsReadWriteAllowed()))
  97           Endpoint_ClearOUT();
  98
  99         return Sample;
 100 }
 101
 102 int16_t Audio_Device_ReadSample16(void)
 103 {
 104         int16_t Sample;
 105
 106         Sample = (int16_t)Endpoint_Read_Word_LE();
 107
 108         if (!(Endpoint_IsReadWriteAllowed()))
 109           Endpoint_ClearOUT();
 110
 111         return Sample;
 112 }
 113
 114 int32_t Audio_Device_ReadSample24(void)
 115 {
 116         int32_t Sample;
 117
 118         Sample = (((uint32_t)Endpoint_Read_Byte() << 16) | Endpoint_Read_Word_LE());
 119
 120         if (!(Endpoint_IsReadWriteAllowed()))
 121           Endpoint_ClearOUT();
 122
 123         return Sample;
 124 }
 125
 126 void Audio_Device_WriteSample8(const int8_t Sample)
 127 {
 128         Endpoint_Write_Byte(Sample);
 129
 130         if (!(Endpoint_IsReadWriteAllowed()))
 131           Endpoint_ClearIN();
 132 }
 133
 134 void Audio_Device_WriteSample16(const int16_t Sample)
 135 {
 136         Endpoint_Write_Word_LE(Sample);
 137
 138         if (!(Endpoint_IsReadWriteAllowed()))
 139           Endpoint_ClearIN();
 140 }
 141
 142 void Audio_Device_WriteSample24(const int32_t Sample)
 143 {
 144         Endpoint_Write_Byte(Sample >> 16);
 145         Endpoint_Write_Word_LE(Sample);
 146
 147         if (!(Endpoint_IsReadWriteAllowed()))
 148           Endpoint_ClearIN();
 149 }
 150
 151 bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 152 {
 153         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber);
 154         return Endpoint_IsOUTReceived();
 155 }
 156
 157 bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 158 {
 159         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber);
 160         return Endpoint_IsINReady();
 161 }
 162
 163 #endif