mixerdrv.cpp

s3c2443的Wavedev代码,觉对好用.

//
// Copyright (c) Microsoft Corporation.  All rights reserved.
//
//
// Use of this source code is subject to the terms of the Microsoft end-user
// license agreement (EULA) under which you licensed this SOFTWARE PRODUCT.
// If you did not accept the terms of the EULA, you are not authorized to use
// this source code. For a copy of the EULA, please see the LICENSE.RTF on your
// install media.
//
// -----------------------------------------------------------------------------
//
//      THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
//      ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
//      THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
//      PARTICULAR PURPOSE.
//
// -----------------------------------------------------------------------------
//
//  @doc    WDEV_EXT
//
//  @module mixerdrv.cpp | Implements the WODM_XXX and WIDM_XXX messages that are
//          passed to the wave audio driver via the <f WAV_IOControl> function.
//          This module contains code that is common or very similar between
//          input and output functions.
//
//  @xref   <t Wave Input Driver Messages> (WIDM_XXX) <nl>
//          <t Wave Output Driver Messages> (WODM_XXX)
//
// -----------------------------------------------------------------------------

#include <wavemain.h>
#include <mmreg.h>

#define ZONE_HWMIXER    ZONE_VERBOSE
#define ZONE_VOLUME     ZONE_VERBOSE

#define LOGICAL_VOLUME_MAX  0xFFFF
#define LOGICAL_VOLUME_MIN  0
#define LOGICAL_VOLUME_STEPS 16

// only support Mic, LineIn as inputs
#define INPUT_SELECT_COUNT 2

#define DEVICE_NAME     L"Audio Mixer"
#define DRIVER_VERSION  0x100

#define NELEMS(x) (sizeof(x)/sizeof((x)[0]))

// mixer handle data types
typedef DWORD (* PFNDRIVERCALL)(DWORD hmx, UINT uMsg, DWORD dwInstance, DWORD dwParam1, DWORD dwParam2);
typedef struct _tagMCB MIXER_CALLBACK, * PMIXER_CALLBACK;
struct _tagMCB
{
    DWORD           hmx;
    PFNDRIVERCALL   pfnCallback;
    PMIXER_CALLBACK pNext;
};

// mixer line ID are 16-bit values formed by concatenating the source and destination line indices
//
#define MXLINEID(dst,src)       ((USHORT) ((USHORT)(dst) | (((USHORT) (src)) << 8)))
#define GET_MXLINE_SRC(lineid)  ((lineid) >> 8)
#define GET_MXLINE_DST(lineid)  ((lineid) & 0xff)
#define GET_MXCONTROL_ID(ctl)   ((ctl)-g_controls)

#ifdef DEBUG

// DEBUG-only support for displaying control type codes in readable form

typedef struct
{
    DWORD   val;
    PWSTR   str;
} MMSYSCODE;

#define MXCTYPE(typ) {typ, TEXT(#typ)}

MMSYSCODE ctype_table[] =
{
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_CUSTOM),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_BASS),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_EQUALIZER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_FADER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_TREBLE),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_VOLUME),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_MIXER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_MULTIPLESELECT),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_MUX),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_SINGLESELECT),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_BOOLEANMETER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_PEAKMETER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_SIGNEDMETER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_UNSIGNEDMETER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_DECIBELS),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_PERCENT),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_SIGNED),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_UNSIGNED),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_PAN),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_QSOUNDPAN),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_SLIDER),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_BOOLEAN),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_BUTTON),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_LOUDNESS),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_MONO),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_MUTE),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_ONOFF),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_STEREOENH),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_MICROTIME),
        MXCTYPE(MIXERCONTROL_CONTROLTYPE_MILLITIME),
};

PWSTR
COMPTYPE(DWORD dwValue)
{ int i;

    for (i = 0; i < NELEMS(ctype_table); i++) {
        if (ctype_table[i].val == dwValue) {
            return ctype_table[i].str;
        }
    }
    return TEXT("<unknown>");

}

#else
#define COMPTYPE(n) TEXT("<>")
#endif

// Destinations:
//    LINE_OUT - line out jack
//      PCM_IN - input to ADC
// Sources
//  MIC - MIC jack


enum {
    LINE_OUT = 0x80,
    PCM_IN,
    MIC,
    NOLINE   = 0xff // doesn't HAVE to be FF, but makes it easier to see
};

const USHORT
g_dst_lines[] =
    {
    MXLINEID(LINE_OUT,NOLINE),
    MXLINEID(PCM_IN,NOLINE)
};

const USHORT
g_PCM_IN_sources[] =
{
    MXLINEID(PCM_IN,MIC)
};


// MXLINEDESC corresponds to MIXERLINE, but is designed to conserve space

typedef struct tagMXLINEDESC  const * PMXLINEDESC, MXLINEDESC;
typedef struct tagMXCONTROLDESC  const * PMXCONTROLDESC, MXCONTROLDESC;

struct tagMXLINEDESC {
    DWORD dwComponentType;
    PCWSTR szShortName;
    PCWSTR szName;
    DWORD ucFlags;
    USHORT const * pSources;
    USHORT usLineID;
    UINT8 ucChannels;
    UINT8 ucConnections;
    UINT8 ucControls;
    DWORD       dwTargetType;
    UINT8   ucDstIndex;
    UINT8   ucSrcIndex;
} ;

// MXCONTROLDESC is driver shorthand for Volume and Mute MIXERCONTROL
struct tagMXCONTROLDESC
{
    PWSTR   szName;
    DWORD   dwType;
    USHORT  usLineID;           // line that owns this control
};

// mixerline ID
#define _MXLE(id,dst,src,flags,comptype,nch,ncnx,nctrl,sname,lname,target,sarray)\
    {comptype,\
    TEXT(sname),TEXT(lname),\
    flags, \
    sarray,\
    id,\
    nch,ncnx,nctrl,\
    target,\
    dst,src}

// declare a destination line
#define MXLED(id,dst,flags,comptype,nch,nctrl,sname,lname,target,srcarray,nsrcs)\
    _MXLE(MXLINEID(id,NOLINE),dst,NOLINE,flags,comptype,nch,nsrcs,nctrl,sname,lname,target,srcarray)\

// declare a source line
#define MXSLE(id,dst,src,flags,comptype,nch,nctrl,sname,lname,target)\
    _MXLE(id,dst,src,flags,comptype,nch,0,nctrl,sname,lname,target,NULL)\

MXLINEDESC
g_mixerline[] =
{
    // dst line 0 - speaker out
    MXLED(LINE_OUT, 0,
        MIXERLINE_LINEF_ACTIVE, // no flags
        MIXERLINE_COMPONENTTYPE_DST_SPEAKERS,
        1, // mono
        2, // controls: volume + mute
        "Volume Control","Volume Control",
        MIXERLINE_TARGETTYPE_WAVEOUT,
        NULL, 0
        ),
    // dst line 1 - microphone input
    MXLED(PCM_IN, 1,
        MIXERLINE_LINEF_ACTIVE, // flags
        MIXERLINE_COMPONENTTYPE_DST_WAVEIN,
        1, // mono
        1, // 1 control (MUX) - the record gain is virtualized across all mux inputs
        "Recording Contr","Recording Control",
        MIXERLINE_TARGETTYPE_WAVEIN,
        g_PCM_IN_sources, NELEMS(g_PCM_IN_sources)
        ),

    // ----------------------
    // PCM_IN Sources Lines
    // ----------------------

    // src line - Microphone
    MXSLE(MXLINEID(PCM_IN, MIC), 1, 1,
        MIXERLINE_LINEF_ACTIVE | MIXERLINE_LINEF_SOURCE, // flags
        MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE,
        1, // mono
        2, // controls: volume, mute
        "Microphone","Microphone",
        MIXERLINE_TARGETTYPE_WAVEIN
        ),

};
const int nlines = NELEMS(g_mixerline);
#undef _MXLE
#undef MXLED
#undef MXSLE



#define MXCE(dst,src,nme,type) {TEXT(nme),type,MXLINEID(dst,src)}
MXCONTROLDESC
g_controls[] =
{
    MXCE(LINE_OUT, NOLINE,  "Master Volume",  MIXERCONTROL_CONTROLTYPE_VOLUME),
    MXCE(LINE_OUT, NOLINE,  "Master Mute",    MIXERCONTROL_CONTROLTYPE_MUTE),
    MXCE(PCM_IN,   MIC,     "Mic Volume",     MIXERCONTROL_CONTROLTYPE_VOLUME),
    MXCE(PCM_IN,   MIC,     "Mic Mute",       MIXERCONTROL_CONTROLTYPE_MUTE),
};
const UINT ncontrols = NELEMS(g_controls);
#undef MXCE

PMXLINEDESC
LookupMxLine(USHORT usLineID)
{
    // scan for mixer line
    int i;
    for (i = 0; i < nlines; i++) {
        if (g_mixerline[i].usLineID == usLineID) {
            return &g_mixerline[i];
        }
    }
    return NULL;
}

int
LookupMxControl (USHORT usLineID, DWORD dwControlType)
{
    UINT i;
    for (i = 0; i < ncontrols; i++) {
        PMXCONTROLDESC pSrcControl = &g_controls[i];
        if (    pSrcControl->usLineID == usLineID
            &&  pSrcControl->dwType == dwControlType) {
            break;
        }
    }
    return i;
}

void
CopyMixerControl(PMIXERCONTROL pDst, PMXCONTROLDESC pSrc, DWORD dwIndex)
{
    // all of our lines have a volume and a mute.
    // in addition, the PCM_IN has a MUX control
    // fill in the volume:
    pDst->cbStruct = sizeof(MIXERCONTROL);
    pDst->dwControlID = dwIndex;