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_ProcessControlRequest(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         memset(&AudioInterfaceInfo->State, 0x00, sizeof(AudioInterfaceInfo->State));
  63
  64         if (AudioInterfaceInfo->Config.DataINEndpointNumber)
  65         {
  66                 if (!(Endpoint_ConfigureEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber, EP_TYPE_ISOCHRONOUS,
  67                                                                                  ENDPOINT_DIR_IN, AudioInterfaceInfo->Config.DataINEndpointSize,
  68                                                                                  ENDPOINT_BANK_DOUBLE)))
  69                 {
  70                         return false;
  71                 }
  72         }
  73
  74         if (AudioInterfaceInfo->Config.DataOUTEndpointNumber)
  75         {
  76                 if (!(Endpoint_ConfigureEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber, EP_TYPE_ISOCHRONOUS,
  77                                                                                  ENDPOINT_DIR_OUT, AudioInterfaceInfo->Config.DataOUTEndpointSize,
  78                                                                                  ENDPOINT_BANK_DOUBLE)))
  79                 {
  80                         return false;
  81                 }
  82         }
  83
  84         return true;
  85 }
  86
  87 void Audio_Device_USBTask(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
  88 {
  89
  90 }
  91
  92 int8_t Audio_Device_ReadSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
  93 {
  94         int8_t Sample;
  95
  96         Sample = Endpoint_Read_Byte();
  97
  98         if (!(Endpoint_BytesInEndpoint()))
  99           Endpoint_ClearOUT();
 100
 101         return Sample;
 102 }
 103
 104 int16_t Audio_Device_ReadSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 105 {
 106         int16_t Sample;
 107
 108         Sample = (int16_t)Endpoint_Read_Word_LE();
 109
 110         if (!(Endpoint_BytesInEndpoint()))
 111           Endpoint_ClearOUT();
 112
 113         return Sample;
 114 }
 115
 116 int32_t Audio_Device_ReadSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 117 {
 118         int32_t Sample;
 119
 120         Sample = (((uint32_t)Endpoint_Read_Byte() << 16) | Endpoint_Read_Word_LE());
 121
 122         if (!(Endpoint_BytesInEndpoint()))
 123           Endpoint_ClearOUT();
 124
 125         return Sample;
 126 }
 127
 128 void Audio_Device_WriteSample8(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, const int8_t Sample)
 129 {
 130         Endpoint_Write_Byte(Sample);
 131
 132         if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)
 133           Endpoint_ClearIN();
 134 }
 135
 136 void Audio_Device_WriteSample16(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, const int16_t Sample)
 137 {
 138         Endpoint_Write_Word_LE(Sample);
 139
 140         if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)
 141           Endpoint_ClearIN();
 142 }
 143
 144 void Audio_Device_WriteSample24(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo, const int32_t Sample)
 145 {
 146         Endpoint_Write_Byte(Sample >> 16);
 147         Endpoint_Write_Word_LE(Sample);
 148
 149         if (Endpoint_BytesInEndpoint() == AudioInterfaceInfo->Config.DataINEndpointSize)
 150           Endpoint_ClearIN();
 151 }
 152
 153 bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 154 {
 155         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled))
 156           return false;
 157
 158         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber);
 159         return Endpoint_IsOUTReceived();
 160 }
 161
 162 bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
 163 {
 164         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled))
 165           return false;
 166
 167         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber);
 168         return Endpoint_IsINReady();
 169 }
 170
 171 #endif