card.c File Reference

#include <ntddk.h>
#include "sndblst.h"

Include dependency graph for card.c:

Go to the source code of this file.

Functions
VOID	SetOutputSampleRate (ULONG BasePort, ULONG SampleRate)
VOID	EnableSpeaker (ULONG BasePort, BOOLEAN SpeakerOn)
BOOLEAN	IsSpeakerEnabled (ULONG BasePort)
VOID	BeginPlayback (ULONG BasePort, ULONG BitDepth, ULONG Channels, ULONG BlockSize)

Function Documentation

BeginPlayback()

VOID BeginPlayback	(	ULONG	BasePort,
		ULONG	BitDepth,
		ULONG	Channels,
		ULONG	BlockSize
	)

Definition at line 51 of file card.c.

{
    DPRINT("BeginPlayback(%d, %d, %d, %d)\n", BasePort, BitDepth, Channels, BlockSize);

//    switch(BitDepth)
//    {
//        case 8 :    Command = 0xc0; break;
//        case 16 :   Command = 0xb0; break;  // Make sure we support it
//        default :   Command = 0xc0;
//    }

    DPRINT("Initiating playback\n");

    // TEMPORARY:
    SB_WRITE_BYTE(BasePort, 0xc6);
    SB_WRITE_BYTE(BasePort, 0); // mode - TEMPORARY
    SB_WRITE_BYTE(BasePort, BlockSize % 256);
    SB_WRITE_BYTE(BasePort, BlockSize / 256);
}

Referenced by InitDevice().

EnableSpeaker()

VOID EnableSpeaker	(	ULONG	BasePort,
		BOOLEAN	SpeakerOn
	)

Definition at line 25 of file card.c.

{
    DPRINT("Setting speaker status %d\n", SpeakerOn);

//    if (! WaitForWrite(BasePort))
//        return;

    SB_WRITE_BYTE(BasePort, SpeakerOn ? SB_ENABLE_SPEAKER : SB_DISABLE_SPEAKER);
}

IsSpeakerEnabled()

BOOLEAN IsSpeakerEnabled

(

ULONG

BasePort

)

Definition at line 36 of file card.c.

{
    DPRINT("Obtaining speaker status\n");

//    if (! WaitToSend(BasePort))
//        return FALSE;

    SB_WRITE_BYTE(BasePort, SB_GET_SPEAKER_STATUS);
    if (! WaitToReceive(BasePort))
        return FALSE;

    return SB_READ_DATA(BasePort) == 0xff;
}

SetOutputSampleRate()

VOID SetOutputSampleRate	(	ULONG	BasePort,
		ULONG	SampleRate
	)

Definition at line 10 of file card.c.

{
    // This only works for DSP v4.xx ONLY - need a workaround!
    DPRINT("Setting output sample rate\n");

    // WAIT
//    if (! WaitToSend(BasePort))
//        return;

    SB_WRITE_BYTE(BasePort, SB_SET_OUTPUT_RATE);
    SB_WRITE_BYTE(BasePort, SampleRate / 256);  // high
    SB_WRITE_BYTE(BasePort, SampleRate % 256);  // low
}