Il commit quotato da Ey3.. riguardava all' emissione di un suono di TEST ( non un file WAV reale ) ... posto il codice relativo al player di TEST.. che si trova al momento in:
\reactos\drivers\wdm\audio\backpln\audio_test\audio_test.c
Code: Select all
#define _UNICODE
#define UNICODE
#include <windows.h>
#include <mmsystem.h>
#include <stdio.h>
#include <math.h>
#define _2pi 6.283185307179586476925286766559
#include <ks.h>
#include <ksmedia.h>
#include "interface.h"
int
__cdecl
main(int argc, char* argv[])
{
ULONG Length;
PSHORT SoundBuffer;
ULONG i = 0;
BOOL Status;
OVERLAPPED Overlapped;
DWORD BytesReturned;
HANDLE hWdmAud;
WDMAUD_DEVICE_INFO DeviceInfo;
hWdmAud = CreateFileW(L"\\\\.\\wdmaud",
GENERIC_READ | GENERIC_WRITE,
0,
NULL,
OPEN_EXISTING,
FILE_FLAG_OVERLAPPED,
NULL);
if (!hWdmAud)
{
printf("Failed to open wdmaud with %lx\n", GetLastError());
return -1;
}
printf("WDMAUD: opened\n");
/* clear device info */
RtlZeroMemory(&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO));
ZeroMemory(&Overlapped, sizeof(OVERLAPPED));
Overlapped.hEvent = CreateEventW(NULL, FALSE, FALSE, NULL);
DeviceInfo.DeviceType = WAVE_OUT_DEVICE_TYPE;
Status = DeviceIoControl(hWdmAud, IOCTL_GETNUMDEVS_TYPE, (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &BytesReturned, &Overlapped);
if (!Status)
{
if (WaitForSingleObject(&Overlapped.hEvent, 5000) != WAIT_OBJECT_0)
{
printf("Failed to get num of wave out devices with %lx\n", GetLastError());
CloseHandle(hWdmAud);
return -1;
}
}
printf("WDMAUD: Num Devices %lu\n", DeviceInfo.DeviceCount);
if (!DeviceInfo.DeviceCount)
{
CloseHandle(hWdmAud);
return 0;
}
DeviceInfo.u.WaveFormatEx.cbSize = sizeof(WAVEFORMATEX);
DeviceInfo.u.WaveFormatEx.wFormatTag = 0x1; //WAVE_FORMAT_PCM;
DeviceInfo.u.WaveFormatEx.nChannels = 2;
DeviceInfo.u.WaveFormatEx.nSamplesPerSec = 48000;
DeviceInfo.u.WaveFormatEx.nBlockAlign = 4;
DeviceInfo.u.WaveFormatEx.nAvgBytesPerSec = 48000 * 4;
DeviceInfo.u.WaveFormatEx.wBitsPerSample = 16;
Status = DeviceIoControl(hWdmAud, IOCTL_GETCAPABILITIES, (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &BytesReturned, &Overlapped);
if (!Status)
{
if (WaitForSingleObject(&Overlapped.hEvent, 5000) != WAIT_OBJECT_0)
{
printf("Failed to get iocaps %lx\n", GetLastError());
}
}
Status = DeviceIoControl(hWdmAud, IOCTL_OPEN_WDMAUD, (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &BytesReturned, &Overlapped);
if (!Status)
{
if (WaitForSingleObject(&Overlapped.hEvent, 5000) != WAIT_OBJECT_0)
{
printf("Failed to open device with %lx\n", GetLastError());
CloseHandle(hWdmAud);
return -1;
}
}
//
// Allocate a buffer for 1 second
//
Length = 48000 * 4;
SoundBuffer = (PSHORT)HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, Length);
//
// Fill the buffer with a 500 Hz sine tone
//
while (i < Length / 2)
{
//
// Generate the wave for each channel:
// Amplitude * sin( Sample * Frequency * 2PI / SamplesPerSecond )
//
SoundBuffer[i] = 0x7FFF * sin(0.5 * (i - 1) * 500 * _2pi / 48000);
i++;
SoundBuffer[i] = 0x7FFF * sin((0.5 * i - 2) * 500 * _2pi / 48000);
i++;
}
DeviceInfo.State = KSSTATE_RUN;
Status = DeviceIoControl(hWdmAud, IOCTL_SETDEVICE_STATE, (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &BytesReturned, &Overlapped);
if (!Status)
{
if (WaitForSingleObject(&Overlapped.hEvent, 5000) != WAIT_OBJECT_0)
{
printf("Failed to set device into run state %lx\n", GetLastError());
CloseHandle(hWdmAud);
return -1;
}
}
//
// Play our 1-second buffer
//
DeviceInfo.Buffer = (PUCHAR)SoundBuffer;
DeviceInfo.BufferSize = Length;
Status = DeviceIoControl(hWdmAud, IOCTL_WRITEDATA, (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &BytesReturned, &Overlapped);
if (!Status)
{
if (WaitForSingleObject(&Overlapped.hEvent, 5000) != WAIT_OBJECT_0)
{
printf("Failed to play buffer %lx\n", GetLastError());
CloseHandle(hWdmAud);
return -1;
}
}
printf("WDMAUD: Played buffer\n");
DeviceInfo.State = KSSTATE_STOP;
Status = DeviceIoControl(hWdmAud, IOCTL_SETDEVICE_STATE, (LPVOID)&DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &DeviceInfo, sizeof(WDMAUD_DEVICE_INFO), &BytesReturned, &Overlapped);
if (!Status)
{
if (WaitForSingleObject(&Overlapped.hEvent, 5000) != WAIT_OBJECT_0)
{
printf("Failed to set device into stop state %lx\n", GetLastError());
CloseHandle(hWdmAud);
return -1;
}
}
printf("WDMAUD: STOPPED\n");
CloseHandle(hWdmAud);
CloseHandle(&Overlapped.hEvent);
printf("WDMAUD: COMPLETE\n");
return 0;
}
). 
(il SO virtuale la vede , ma non c'è nessuna interazione con l' hardware reale del pc)
