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MiniDexed/src/usbminidexedmidigadget.h

86 lines
2.2 KiB

//
// usbminidexedmidigadget.h
//
// MiniDexed - Dexed FM synthesizer for bare metal Raspberry Pi
// Copyright (C) 2022 The MiniDexed Team
//
// Based on circle/usb/gadget/usbmidigadget.h
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
//
#ifndef _usbminidexedmidigadget_h
#define _usbminidexedmidigadget_h
#include <circle/usb/gadget/usbmidigadget.h>
#include <circle/usb/gadget/usbmidigadgetendpoint.h>
#include <circle/sysconfig.h>
#include <assert.h>
class CUSBMiniDexedMIDIGadget : public CUSBMIDIGadget
{
private:
#define MDSTRINGDESCRIPTORS 3
const char *const s_MiniDexedStringDescriptor[MDSTRINGDESCRIPTORS] =
{
"\x04\x03\x09\x04", // Language ID
"probonopd",
"MiniDexed"
};
public:
CUSBMiniDexedMIDIGadget (CInterruptSystem *pInterruptSystem)
: CUSBMIDIGadget (pInterruptSystem)
{
}
~CUSBMiniDexedMIDIGadget (void)
{
assert(0);
}
protected:
// Override GetDescriptor frmo CUSBMIDIGadget.
// See CUSBMIDIGadget for details.
// This will only act on the DESCRIPOR_STRING.
// All other descriptors are returned from USBMIDIGadget.
//
const void *GetDescriptor (u16 wValue, u16 wIndex, size_t *pLength) override
{
assert (pLength);
u8 uchDescIndex = wValue & 0xFF;
switch (wValue >> 8)
{
case DESCRIPTOR_STRING:
if (!uchDescIndex)
{
*pLength = (u8) s_MiniDexedStringDescriptor[0][0];
return s_MiniDexedStringDescriptor[0];
}
else if (uchDescIndex < MDSTRINGDESCRIPTORS)
{
return CUSBMIDIGadget::ToStringDescriptor (s_MiniDexedStringDescriptor[uchDescIndex], pLength);
}
break;
default:
break;
}
return CUSBMIDIGadget::GetDescriptor(wValue, wIndex, pLength);
}
};
#endif