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

   1 /*
   2              LUFA Library
   3      Copyright (C) Dean Camera, 2010.
   4
   5   dean [at] fourwalledcubicle [dot] com
   6       www.fourwalledcubicle.com
   7 */
   8
   9 /*
  10   Copyright 2010  Dean Camera (dean [at] fourwalledcubicle [dot] com)
  11
  12   Permission to use, copy, modify, distribute, and sell this
  13   software and its documentation for any purpose is hereby granted
  14   without fee, provided that the above copyright notice appear in
  15   all 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 & 0xFF) != 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 bool Audio_Device_IsSampleReceived(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
  88 {
  89         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled))
  90           return false;
  91
  92         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataOUTEndpointNumber);
  93         return Endpoint_IsOUTReceived();
  94 }
  95
  96 bool Audio_Device_IsReadyForNextSample(USB_ClassInfo_Audio_Device_t* const AudioInterfaceInfo)
  97 {
  98         if ((USB_DeviceState != DEVICE_STATE_Configured) || !(AudioInterfaceInfo->State.InterfaceEnabled))
  99           return false;
 100
 101         Endpoint_SelectEndpoint(AudioInterfaceInfo->Config.DataINEndpointNumber);
 102         return Endpoint_IsINReady();
 103 }
 104
 105 #endif