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wine/dlls/winealsa.drv/waveinit.c

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/*
* Sample Wine Driver for Advanced Linux Sound System (ALSA)
* Based on version <final> of the ALSA API
*
* This file performs the initialisation and scanning of the sound subsystem.
*
* Copyright 2002 Eric Pouech
* 2002 Marco Pietrobono
* 2003 Christian Costa : WaveIn support
* 2006-2007 Maarten Lankhorst
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#ifdef HAVE_ALSA
#include "wine/port.h"
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <errno.h>
#include <limits.h>
#include <fcntl.h>
#ifdef HAVE_SYS_IOCTL_H
# include <sys/ioctl.h>
#endif
#ifdef HAVE_SYS_MMAN_H
# include <sys/mman.h>
#endif
#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winerror.h"
#include "winuser.h"
#include "winnls.h"
#include "winreg.h"
#include "mmddk.h"
/* ksmedia.h defines KSDATAFORMAT_SUBTYPE_PCM and KSDATAFORMAT_SUBTYPE_IEEE_FLOAT
* However either all files that use it will define it, or no files will
* The only way to solve this is by adding initguid.h here, and include the guid that way
*/
#include "initguid.h"
#include "alsa.h"
#include "wine/library.h"
#include "wine/unicode.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(wave);
/*----------------------------------------------------------------------------
** ALSA_TestDeviceForWine
**
** Test to see if a given device is sufficient for Wine.
*/
static int ALSA_TestDeviceForWine(int card, int device, snd_pcm_stream_t streamtype)
{
snd_pcm_t *pcm = NULL;
char pcmname[256];
int retcode;
snd_pcm_hw_params_t *hwparams;
const char *reason = NULL;
unsigned int rrate;
hwparams = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof() );
/* Note that the plug: device masks out a lot of info, we want to avoid that */
sprintf(pcmname, "hw:%d,%d", card, device);
retcode = snd_pcm_open(&pcm, pcmname, streamtype, SND_PCM_NONBLOCK);
if (retcode < 0)
{
/* Note that a busy device isn't automatically disqualified */
if (retcode == (-1 * EBUSY))
retcode = 0;
goto exit;
}
retcode = snd_pcm_hw_params_any(pcm, hwparams);
if (retcode < 0)
{
reason = "Could not retrieve hw_params";
goto exit;
}
/* set the count of channels */
retcode = snd_pcm_hw_params_set_channels(pcm, hwparams, 2);
if (retcode < 0)
{
retcode = snd_pcm_hw_params_set_channels(pcm, hwparams, 1); /* If we can't open stereo, try mono; this is vital for snd_usb_audio microphones */
}
if (retcode < 0)
{
reason = "Could not set channels";
goto exit;
}
rrate = 44100;
retcode = snd_pcm_hw_params_set_rate_near(pcm, hwparams, &rrate, 0);
if (retcode < 0)
{
reason = "Could not set rate";
goto exit;
}
if (rrate == 0)
{
reason = "Rate came back as 0";
goto exit;
}
/* write the parameters to device */
retcode = snd_pcm_hw_params(pcm, hwparams);
if (retcode < 0)
{
reason = "Could not set hwparams";
goto exit;
}
retcode = 0;
exit:
if (pcm)
snd_pcm_close(pcm);
HeapFree( GetProcessHeap(), 0, hwparams );
if (retcode != 0 && retcode != (-1 * ENOENT))
TRACE("Discarding card %d/device %d: %s [%d(%s)]\n", card, device, reason, retcode, snd_strerror(retcode));
return retcode;
}
/*----------------------------------------------------------------------------
** ALSA_RegGetString
** Retrieve a string from a registry key
*/
static int ALSA_RegGetString(HKEY key, const char *value, char **bufp)
{
DWORD rc;
DWORD type;
DWORD bufsize;
*bufp = NULL;
rc = RegQueryValueExA(key, value, NULL, &type, NULL, &bufsize);
if (rc != ERROR_SUCCESS)
return(rc);
if (type != REG_SZ)
return 1;
*bufp = HeapAlloc(GetProcessHeap(), 0, bufsize);
if (! *bufp)
return 1;
rc = RegQueryValueExA(key, value, NULL, NULL, (LPBYTE)*bufp, &bufsize);
return rc;
}
/*----------------------------------------------------------------------------
** ALSA_RegGetBoolean
** Get a string and interpret it as a boolean
*/
/* Possible truths:
Y(es), T(rue), 1, E(nabled) */
#define IS_OPTION_TRUE(ch) ((ch) == 'y' || (ch) == 'Y' || (ch) == 't' || (ch) == 'T' || (ch) == '1' || (ch) == 'e' || (ch) == 'E')
static int ALSA_RegGetBoolean(HKEY key, const char *value, BOOL *answer)
{
DWORD rc;
char *buf = NULL;
rc = ALSA_RegGetString(key, value, &buf);
if (buf)
{
*answer = FALSE;
if (IS_OPTION_TRUE(*buf))
*answer = TRUE;
HeapFree(GetProcessHeap(), 0, buf);
}
return rc;
}
/*----------------------------------------------------------------------------
** ALSA_RegGetInt
** Get a string and interpret it as a DWORD
*/
static int ALSA_RegGetInt(HKEY key, const char *value, DWORD *answer)
{
DWORD rc;
char *buf = NULL;
rc = ALSA_RegGetString(key, value, &buf);
if (buf)
{
*answer = atoi(buf);
HeapFree(GetProcessHeap(), 0, buf);
}
return rc;
}
/* return a string duplicated on the win32 process heap, free with HeapFree */
static char* ALSA_strdup(const char *s) {
char *result = HeapAlloc(GetProcessHeap(), 0, strlen(s)+1);
if (!result)
return NULL;
strcpy(result, s);
return result;
}
#define ALSA_RETURN_ONFAIL(mycall) \
{ \
int rc; \
{rc = mycall;} \
if ((rc) < 0) \
{ \
ERR("%s failed: %s(%d)\n", #mycall, snd_strerror(rc), rc); \
return(rc); \
} \
}
/*----------------------------------------------------------------------------
** ALSA_ComputeCaps
**
** Given an ALSA PCM, figure out our HW CAPS structure info.
** ctl can be null, pcm is required, as is all output parms.
**
*/
static int ALSA_ComputeCaps(snd_ctl_t *ctl, snd_pcm_t *pcm,
WORD *channels, DWORD *flags, DWORD *formats, DWORD *supports)
{
snd_pcm_hw_params_t *hw_params;
snd_pcm_format_mask_t *fmask;
snd_pcm_access_mask_t *acmask;
unsigned int ratemin = 0;
unsigned int ratemax = 0;
unsigned int chmin = 0;
unsigned int chmax = 0;
int rc, dir = 0;
hw_params = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_hw_params_sizeof() );
fmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_format_mask_sizeof() );
acmask = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_access_mask_sizeof() );
if ((rc = snd_pcm_hw_params_any(pcm, hw_params)) < 0) goto done;
snd_pcm_hw_params_get_format_mask(hw_params, fmask);
if ((rc = snd_pcm_hw_params_get_access_mask(hw_params, acmask)) < 0) goto done;
if ((rc = snd_pcm_hw_params_get_rate_min(hw_params, &ratemin, &dir)) < 0) goto done;
if ((rc = snd_pcm_hw_params_get_rate_max(hw_params, &ratemax, &dir)) < 0) goto done;
if ((rc = snd_pcm_hw_params_get_channels_min(hw_params, &chmin)) < 0) goto done;
if ((rc = snd_pcm_hw_params_get_channels_max(hw_params, &chmax)) < 0) goto done;
#define X(r,v) \
if ( (r) >= ratemin && ( (r) <= ratemax || ratemax == -1) ) \
{ \
if (snd_pcm_format_mask_test( fmask, SND_PCM_FORMAT_U8)) \
{ \
if (chmin <= 1 && 1 <= chmax) \
*formats |= WAVE_FORMAT_##v##M08; \
if (chmin <= 2 && 2 <= chmax) \
*formats |= WAVE_FORMAT_##v##S08; \
} \
if (snd_pcm_format_mask_test( fmask, SND_PCM_FORMAT_S16_LE)) \
{ \
if (chmin <= 1 && 1 <= chmax) \
*formats |= WAVE_FORMAT_##v##M16; \
if (chmin <= 2 && 2 <= chmax) \
*formats |= WAVE_FORMAT_##v##S16; \
} \
}
X(11025,1);
X(22050,2);
X(44100,4);
X(48000,48);
X(96000,96);
#undef X
if (chmin > 1)
FIXME("Device has a minimum of %d channels\n", chmin);
*channels = chmax;
/* FIXME: is sample accurate always true ?
** Can we do WAVECAPS_PITCH, WAVECAPS_SYNC, or WAVECAPS_PLAYBACKRATE? */
*supports |= WAVECAPS_SAMPLEACCURATE;
*supports |= WAVECAPS_DIRECTSOUND;
/* check for volume control support */
if (ctl) {
if (snd_ctl_name(ctl))
{
snd_hctl_t *hctl;
if (snd_hctl_open(&hctl, snd_ctl_name(ctl), 0) >= 0)
{
snd_hctl_load(hctl);
if (!ALSA_CheckSetVolume( hctl, NULL, NULL, NULL, NULL, NULL, NULL, NULL ))
{
*supports |= WAVECAPS_VOLUME;
if (chmin <= 2 && 2 <= chmax)
*supports |= WAVECAPS_LRVOLUME;
}
snd_hctl_free(hctl);
snd_hctl_close(hctl);
}
}
}
*flags = DSCAPS_CERTIFIED | DSCAPS_CONTINUOUSRATE;
*flags |= DSCAPS_SECONDARYMONO | DSCAPS_SECONDARYSTEREO;
*flags |= DSCAPS_SECONDARY8BIT | DSCAPS_SECONDARY16BIT;
if (*formats & (WAVE_FORMAT_1M08 | WAVE_FORMAT_2M08 |
WAVE_FORMAT_4M08 | WAVE_FORMAT_48M08 |
WAVE_FORMAT_96M08 | WAVE_FORMAT_1M16 |
WAVE_FORMAT_2M16 | WAVE_FORMAT_4M16 |
WAVE_FORMAT_48M16 | WAVE_FORMAT_96M16) )
*flags |= DSCAPS_PRIMARYMONO;
if (*formats & (WAVE_FORMAT_1S08 | WAVE_FORMAT_2S08 |
WAVE_FORMAT_4S08 | WAVE_FORMAT_48S08 |
WAVE_FORMAT_96S08 | WAVE_FORMAT_1S16 |
WAVE_FORMAT_2S16 | WAVE_FORMAT_4S16 |
WAVE_FORMAT_48S16 | WAVE_FORMAT_96S16) )
*flags |= DSCAPS_PRIMARYSTEREO;
if (*formats & (WAVE_FORMAT_1M08 | WAVE_FORMAT_2M08 |
WAVE_FORMAT_4M08 | WAVE_FORMAT_48M08 |
WAVE_FORMAT_96M08 | WAVE_FORMAT_1S08 |
WAVE_FORMAT_2S08 | WAVE_FORMAT_4S08 |
WAVE_FORMAT_48S08 | WAVE_FORMAT_96S08) )
*flags |= DSCAPS_PRIMARY8BIT;
if (*formats & (WAVE_FORMAT_1M16 | WAVE_FORMAT_2M16 |
WAVE_FORMAT_4M16 | WAVE_FORMAT_48M16 |
WAVE_FORMAT_96M16 | WAVE_FORMAT_1S16 |
WAVE_FORMAT_2S16 | WAVE_FORMAT_4S16 |
WAVE_FORMAT_48S16 | WAVE_FORMAT_96S16) )
*flags |= DSCAPS_PRIMARY16BIT;
rc = 0;
done:
if (rc < 0) ERR("failed: %s(%d)\n", snd_strerror(rc), rc);
HeapFree( GetProcessHeap(), 0, hw_params );
HeapFree( GetProcessHeap(), 0, fmask );
HeapFree( GetProcessHeap(), 0, acmask );
return rc;
}
/*----------------------------------------------------------------------------
** ALSA_AddCommonDevice
**
** Perform Alsa initialization common to both capture and playback
**
** Side Effect: ww->pcname and ww->ctlname may need to be freed.
**
** Note: this was originally coded by using snd_pcm_name(pcm), until
** I discovered that with at least one version of alsa lib,
** the use of a pcm named default:0 would cause snd_pcm_name() to fail.
** So passing the name in is logically extraneous. Sigh.
*/
static int ALSA_AddCommonDevice(snd_ctl_t *ctl, snd_pcm_t *pcm, const char *pcmname, WINE_WAVEDEV *ww)
{
snd_pcm_info_t *infop;
int rc;
infop = HeapAlloc( GetProcessHeap(), HEAP_ZERO_MEMORY, snd_pcm_info_sizeof() );
if ((rc = snd_pcm_info(pcm, infop)) < 0)
{
HeapFree( GetProcessHeap(), 0, infop );
return rc;
}
if (pcm && pcmname)
ww->pcmname = ALSA_strdup(pcmname);
else
{
HeapFree( GetProcessHeap(), 0, infop );
return -1;
}
if (ctl && snd_ctl_name(ctl))
ww->ctlname = ALSA_strdup(snd_ctl_name(ctl));
strcpy(ww->interface_name, "winealsa: ");
memcpy(ww->interface_name + strlen(ww->interface_name),
ww->pcmname,
min(strlen(ww->pcmname), sizeof(ww->interface_name) - strlen("winealsa: ")));
strcpy(ww->ds_desc.szDrvname, "winealsa.drv");
memcpy(ww->ds_desc.szDesc, snd_pcm_info_get_name(infop),
min( (sizeof(ww->ds_desc.szDesc) - 1), strlen(snd_pcm_info_get_name(infop))) );
ww->ds_caps.dwMinSecondarySampleRate = DSBFREQUENCY_MIN;
ww->ds_caps.dwMaxSecondarySampleRate = DSBFREQUENCY_MAX;
ww->ds_caps.dwPrimaryBuffers = 1;
HeapFree( GetProcessHeap(), 0, infop );
return 0;
}
/*----------------------------------------------------------------------------
** ALSA_FreeDevice
*/
static void ALSA_FreeDevice(WINE_WAVEDEV *ww)
{
HeapFree(GetProcessHeap(), 0, ww->pcmname);
ww->pcmname = NULL;
HeapFree(GetProcessHeap(), 0, ww->ctlname);
ww->ctlname = NULL;
}
/*----------------------------------------------------------------------------
** ALSA_AddDeviceToArray
**
** Dynamically size one of the wavein or waveout arrays of devices,
** and add a fully configured device node to the array.
**
*/
static int ALSA_AddDeviceToArray(WINE_WAVEDEV *ww, WINE_WAVEDEV **array,
DWORD *count, DWORD *alloced, int isdefault)
{
int i = *count;
if (*count >= *alloced)
{
(*alloced) += WAVEDEV_ALLOC_EXTENT_SIZE;
if (! (*array))
*array = HeapAlloc(GetProcessHeap(), 0, sizeof(*ww) * (*alloced));
else
*array = HeapReAlloc(GetProcessHeap(), 0, *array, sizeof(*ww) * (*alloced));
if (!*array)
{
return -1;
}
}
/* If this is the default, arrange for it to be the first element */
if (isdefault && i > 0)
{
(*array)[*count] = (*array)[0];
i = 0;
}
(*array)[i] = *ww;
(*count)++;
return 0;
}
/*----------------------------------------------------------------------------
** ALSA_AddPlaybackDevice
**
** Add a given Alsa device to Wine's internal list of Playback
** devices.
*/
static int ALSA_AddPlaybackDevice(snd_ctl_t *ctl, snd_pcm_t *pcm, const char *pcmname, int isdefault)
{
WINE_WAVEDEV wwo;
int rc;
memset(&wwo, '\0', sizeof(wwo));
rc = ALSA_AddCommonDevice(ctl, pcm, pcmname, &wwo);
if (rc)
return(rc);
MultiByteToWideChar(CP_UNIXCP, 0, wwo.ds_desc.szDesc, -1,
wwo.outcaps.szPname, sizeof(wwo.outcaps.szPname)/sizeof(WCHAR));
wwo.outcaps.szPname[sizeof(wwo.outcaps.szPname)/sizeof(WCHAR) - 1] = '\0';
wwo.outcaps.wMid = MM_CREATIVE;
wwo.outcaps.wPid = MM_CREATIVE_SBP16_WAVEOUT;
wwo.outcaps.vDriverVersion = 0x0100;
rc = ALSA_ComputeCaps(ctl, pcm, &wwo.outcaps.wChannels, &wwo.ds_caps.dwFlags,
&wwo.outcaps.dwFormats, &wwo.outcaps.dwSupport);
if (rc)
{
WARN("Error calculating device caps for pcm [%s]\n", wwo.pcmname);
ALSA_FreeDevice(&wwo);
return(rc);
}
rc = ALSA_AddDeviceToArray(&wwo, &WOutDev, &ALSA_WodNumDevs, &ALSA_WodNumMallocedDevs, isdefault);
if (rc)
ALSA_FreeDevice(&wwo);
return (rc);
}
/*----------------------------------------------------------------------------
** ALSA_AddCaptureDevice
**
** Add a given Alsa device to Wine's internal list of Capture
** devices.
*/
static int ALSA_AddCaptureDevice(snd_ctl_t *ctl, snd_pcm_t *pcm, const char *pcmname, int isdefault)
{
WINE_WAVEDEV wwi;
int rc;
memset(&wwi, '\0', sizeof(wwi));
rc = ALSA_AddCommonDevice(ctl, pcm, pcmname, &wwi);
if (rc)
return(rc);
MultiByteToWideChar(CP_UNIXCP, 0, wwi.ds_desc.szDesc, -1,
wwi.incaps.szPname, sizeof(wwi.incaps.szPname) / sizeof(WCHAR));
wwi.incaps.szPname[sizeof(wwi.incaps.szPname)/sizeof(WCHAR) - 1] = '\0';
wwi.incaps.wMid = MM_CREATIVE;
wwi.incaps.wPid = MM_CREATIVE_SBP16_WAVEOUT;
wwi.incaps.vDriverVersion = 0x0100;
rc = ALSA_ComputeCaps(ctl, pcm, &wwi.incaps.wChannels, &wwi.ds_caps.dwFlags,
&wwi.incaps.dwFormats, &wwi.dwSupport);
if (rc)
{
WARN("Error calculating device caps for pcm [%s]\n", wwi.pcmname);
ALSA_FreeDevice(&wwi);
return(rc);
}
rc = ALSA_AddDeviceToArray(&wwi, &WInDev, &ALSA_WidNumDevs, &ALSA_WidNumMallocedDevs, isdefault);
if (rc)
ALSA_FreeDevice(&wwi);
return(rc);
}
/*----------------------------------------------------------------------------
** ALSA_CheckEnvironment
**
** Given an Alsa style configuration node, scan its subitems
** for environment variable names, and use them to find an override,
** if appropriate.
** This is essentially a long and convoluted way of doing:
** getenv("ALSA_CARD")
** getenv("ALSA_CTL_CARD")
** getenv("ALSA_PCM_CARD")
** getenv("ALSA_PCM_DEVICE")
**
** The output value is set with the atoi() of the first environment
** variable found to be set, if any; otherwise, it is left alone
*/
static void ALSA_CheckEnvironment(snd_config_t *node, int *outvalue)
{
snd_config_iterator_t iter;
for (iter = snd_config_iterator_first(node);
iter != snd_config_iterator_end(node);
iter = snd_config_iterator_next(iter))
{
snd_config_t *leaf = snd_config_iterator_entry(iter);
if (snd_config_get_type(leaf) == SND_CONFIG_TYPE_STRING)
{
const char *value;
if (snd_config_get_string(leaf, &value) >= 0)
{
char *p = getenv(value);
if (p)
{
*outvalue = atoi(p);
return;
}
}
}
}
}
/*----------------------------------------------------------------------------
** ALSA_DefaultDevices
**
** Jump through Alsa style hoops to (hopefully) properly determine
** Alsa defaults for CTL Card #, as well as for PCM Card + Device #.
** We'll also find out if the user has set any of the environment
** variables that specify we're to use a specific card or device.
**
** Parameters:
** directhw Whether to use a direct hardware device or not;
** essentially switches the pcm device name from
** one of 'default:X' or 'plughw:X' to "hw:X"
** defctlcard If !NULL, will hold the ctl card number given
** by the ALSA config as the default
** defpcmcard If !NULL, default pcm card #
** defpcmdev If !NULL, default pcm device #
** fixedctlcard If !NULL, and the user set the appropriate
** environment variable, we'll set to the
** card the user specified.
** fixedpcmcard If !NULL, and the user set the appropriate
** environment variable, we'll set to the
** card the user specified.
** fixedpcmdev If !NULL, and the user set the appropriate
** environment variable, we'll set to the
** device the user specified.
**
** Returns: 0 on success, < 0 on failure
*/
static int ALSA_DefaultDevices(int directhw,
long *defctlcard,
long *defpcmcard, long *defpcmdev,
int *fixedctlcard,
int *fixedpcmcard, int *fixedpcmdev)
{
snd_config_t *configp;
char pcmsearch[256];
ALSA_RETURN_ONFAIL(snd_config_update());
if (defctlcard)
if (snd_config_search(snd_config, "defaults.ctl.card", &configp) >= 0)
snd_config_get_integer(configp, defctlcard);
if (defpcmcard)
if (snd_config_search(snd_config, "defaults.pcm.card", &configp) >= 0)
snd_config_get_integer(configp, defpcmcard);
if (defpcmdev)
if (snd_config_search(snd_config, "defaults.pcm.device", &configp) >= 0)
snd_config_get_integer(configp, defpcmdev);
if (fixedctlcard)
{
if (snd_config_search(snd_config, "ctl.hw.@args.CARD.default.vars", &configp) >= 0)
ALSA_CheckEnvironment(configp, fixedctlcard);
}
if (fixedpcmcard)
{
sprintf(pcmsearch, "pcm.%s.@args.CARD.default.vars", directhw ? "hw" : "plughw");
if (snd_config_search(snd_config, pcmsearch, &configp) >= 0)
ALSA_CheckEnvironment(configp, fixedpcmcard);
}
if (fixedpcmdev)
{
sprintf(pcmsearch, "pcm.%s.@args.DEV.default.vars", directhw ? "hw" : "plughw");
if (snd_config_search(snd_config, pcmsearch, &configp) >= 0)
ALSA_CheckEnvironment(configp, fixedpcmdev);
}
return 0;
}
/*----------------------------------------------------------------------------
** ALSA_ScanDevices
**
** Iterate through all discoverable ALSA cards, searching
** for usable PCM devices.
**
** Parameters:
** directhw Whether to use a direct hardware device or not;
** essentially switches the pcm device name from
** one of 'default:X' or 'plughw:X' to "hw:X"
** defctlcard Alsa's notion of the default ctl card.
** defpcmcard . pcm card
** defpcmdev . pcm device
** fixedctlcard If not -1, then gives the value of ALSA_CTL_CARD
** or equivalent environment variable
** fixedpcmcard If not -1, then gives the value of ALSA_PCM_CARD
** or equivalent environment variable
** fixedpcmdev If not -1, then gives the value of ALSA_PCM_DEVICE
** or equivalent environment variable
**
** Returns: 0 on success, < 0 on failure
*/
static int ALSA_ScanDevices(int directhw,
long defctlcard, long defpcmcard, long defpcmdev,
int fixedctlcard, int fixedpcmcard, int fixedpcmdev)
{
int card = fixedpcmcard;
int scan_devices = (fixedpcmdev == -1);
/*------------------------------------------------------------------------
** Loop through all available cards
**----------------------------------------------------------------------*/
if (card == -1)
snd_card_next(&card);
for (; card != -1; snd_card_next(&card))
{
char ctlname[256];
snd_ctl_t *ctl;
int rc;
int device;
/*--------------------------------------------------------------------
** Try to open a ctl handle; Wine doesn't absolutely require one,
** but it does allow for volume control and for device scanning
**------------------------------------------------------------------*/
sprintf(ctlname, "hw:%d", fixedctlcard == -1 ? card : fixedctlcard);
rc = snd_ctl_open(&ctl, ctlname, SND_CTL_NONBLOCK);
if (rc < 0)
{
ctl = NULL;
WARN("Unable to open an alsa ctl for [%s] (pcm card %d): %s; not scanning devices\n",
ctlname, card, snd_strerror(rc));
if (fixedpcmdev == -1)
fixedpcmdev = 0;
}
/*--------------------------------------------------------------------
** Loop through all available devices on this card
**------------------------------------------------------------------*/
device = fixedpcmdev;
if (device == -1)
snd_ctl_pcm_next_device(ctl, &device);
for (; device != -1; snd_ctl_pcm_next_device(ctl, &device))
{
char defaultpcmname[256];
char plugpcmname[256];
char hwpcmname[256];
char *pcmname = NULL;
snd_pcm_t *pcm;
sprintf(defaultpcmname, "default");
sprintf(plugpcmname, "plughw:%d,%d", card, device);
sprintf(hwpcmname, "hw:%d,%d", card, device);
/*----------------------------------------------------------------
** See if it's a valid playback device
**--------------------------------------------------------------*/
if (ALSA_TestDeviceForWine(card, device, SND_PCM_STREAM_PLAYBACK) == 0)
{
/* If we can, try the default:X device name first */
if (! scan_devices && ! directhw)
{
pcmname = defaultpcmname;
rc = snd_pcm_open(&pcm, pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
}
else
rc = -1;
if (rc < 0)
{
pcmname = directhw ? hwpcmname : plugpcmname;
rc = snd_pcm_open(&pcm, pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
}
if (rc >= 0)
{
if (defctlcard == card && defpcmcard == card && defpcmdev == device)
ALSA_AddPlaybackDevice(ctl, pcm, pcmname, TRUE);
else
ALSA_AddPlaybackDevice(ctl, pcm, pcmname, FALSE);
snd_pcm_close(pcm);
}
else
{
TRACE("Device [%s/%s] failed to open for playback: %s\n",
directhw || scan_devices ? "(N/A)" : defaultpcmname,
directhw ? hwpcmname : plugpcmname,
snd_strerror(rc));
}
}
/*----------------------------------------------------------------
** See if it's a valid capture device
**--------------------------------------------------------------*/
if (ALSA_TestDeviceForWine(card, device, SND_PCM_STREAM_CAPTURE) == 0)
{
/* If we can, try the default:X device name first */
if (! scan_devices && ! directhw)
{
pcmname = defaultpcmname;
rc = snd_pcm_open(&pcm, pcmname, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
}
else
rc = -1;
if (rc < 0)
{
pcmname = directhw ? hwpcmname : plugpcmname;
rc = snd_pcm_open(&pcm, pcmname, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
}
if (rc >= 0)
{
if (defctlcard == card && defpcmcard == card && defpcmdev == device)
ALSA_AddCaptureDevice(ctl, pcm, pcmname, TRUE);
else
ALSA_AddCaptureDevice(ctl, pcm, pcmname, FALSE);
snd_pcm_close(pcm);
}
else
{
TRACE("Device [%s/%s] failed to open for capture: %s\n",
directhw || scan_devices ? "(N/A)" : defaultpcmname,
directhw ? hwpcmname : plugpcmname,
snd_strerror(rc));
}
}
if (! scan_devices)
break;
}
if (ctl)
snd_ctl_close(ctl);
/*--------------------------------------------------------------------
** If the user has set env variables such that we're pegged to
** a specific card, then break after we've examined it
**------------------------------------------------------------------*/
if (fixedpcmcard != -1)
break;
}
return 0;
}
/*----------------------------------------------------------------------------
** ALSA_PerformDefaultScan
** Perform the basic default scanning for devices within ALSA.
** The hope is that this routine implements a 'correct'
** scanning algorithm from the Alsalib point of view.
**
** Note that Wine, overall, has other mechanisms to
** override and specify exact CTL and PCM device names,
** but this routine is imagined as the default that
** 99% of users will use.
**
** The basic algorithm is simple:
** Use snd_card_next to iterate cards; within cards, use
** snd_ctl_pcm_next_device to iterate through devices.
**
** We add a little complexity by taking into consideration
** environment variables such as ALSA_CARD (et all), and by
** detecting when a given device matches the default specified
** by Alsa.
**
** Parameters:
** directhw If !0, indicates we should use the hw:X
** PCM interface, rather than first try
** the 'default' device followed by the plughw
** device. (default and plughw do fancy mixing
** and audio scaling, if they are available).
** devscan If TRUE, we should scan all devices, not
** juse use device 0 on each card
**
** Returns:
** 0 on success
**
** Effects:
** Invokes the ALSA_AddXXXDevice functions on valid
** looking devices
*/
static int ALSA_PerformDefaultScan(int directhw, BOOL devscan)
{
long defctlcard = -1, defpcmcard = -1, defpcmdev = -1;
int fixedctlcard = -1, fixedpcmcard = -1, fixedpcmdev = -1;
int rc;
/* FIXME: We should dlsym the new snd_names_list/snd_names_list_free 1.0.9 apis,
** and use them instead of this scan mechanism if they are present */
rc = ALSA_DefaultDevices(directhw, &defctlcard, &defpcmcard, &defpcmdev,
&fixedctlcard, &fixedpcmcard, &fixedpcmdev);
if (rc)
return(rc);
if (fixedpcmdev == -1 && ! devscan)
fixedpcmdev = 0;
return(ALSA_ScanDevices(directhw, defctlcard, defpcmcard, defpcmdev, fixedctlcard, fixedpcmcard, fixedpcmdev));
}
/*----------------------------------------------------------------------------
** ALSA_AddUserSpecifiedDevice
** Add a device given from the registry
*/
static int ALSA_AddUserSpecifiedDevice(const char *ctlname, const char *pcmname)
{
int rc;
int okay = 0;
snd_ctl_t *ctl = NULL;
snd_pcm_t *pcm = NULL;
if (ctlname)
{
rc = snd_ctl_open(&ctl, ctlname, SND_CTL_NONBLOCK);
if (rc < 0)
ctl = NULL;
}
rc = snd_pcm_open(&pcm, pcmname, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK);
if (rc >= 0)
{
ALSA_AddPlaybackDevice(ctl, pcm, pcmname, FALSE);
okay++;
snd_pcm_close(pcm);
}
rc = snd_pcm_open(&pcm, pcmname, SND_PCM_STREAM_CAPTURE, SND_PCM_NONBLOCK);
if (rc >= 0)
{
ALSA_AddCaptureDevice(ctl, pcm, pcmname, FALSE);
okay++;
snd_pcm_close(pcm);
}
if (ctl)
snd_ctl_close(ctl);
return (okay == 0);
}
/*----------------------------------------------------------------------------
** ALSA_WaveInit
** Initialize the Wine Alsa sub system.
** The main task is to probe for and store a list of all appropriate playback
** and capture devices.
** Key control points are from the registry key:
** [Software\Wine\Alsa Driver]
** AutoScanCards Whether or not to scan all known sound cards
** and add them to Wine's list (default yes)
** AutoScanDevices Whether or not to scan all known PCM devices
** on each card (default no)
** UseDirectHW Whether or not to use the hw:X device,
** instead of the fancy default:X or plughw:X device.
** The hw:X device goes straight to the hardware
** without any fancy mixing or audio scaling in between.
** DeviceCount If present, specifies the number of hard coded
** Alsa devices to add to Wine's list; default 0
** DevicePCMn Specifies the Alsa PCM devices to open for
** Device n (where n goes from 1 to DeviceCount)
** DeviceCTLn Specifies the Alsa control devices to open for
** Device n (where n goes from 1 to DeviceCount)
**
** Using AutoScanCards no, and then Devicexxx info
** is a way to exactly specify the devices used by Wine.
**
*/
void ALSA_WaveInit(void)
{
DWORD rc;
BOOL AutoScanCards = TRUE;
BOOL AutoScanDevices = FALSE;
BOOL UseDirectHW = FALSE;
DWORD DeviceCount = 0;
HKEY key = 0;
int i;
static int loaded;
if (loaded++)
return;
/* @@ Wine registry key: HKCU\Software\Wine\Alsa Driver */
rc = RegOpenKeyExA(HKEY_CURRENT_USER, "Software\\Wine\\Alsa Driver", 0, KEY_QUERY_VALUE, &key);
if (rc == ERROR_SUCCESS)
{
ALSA_RegGetBoolean(key, "AutoScanCards", &AutoScanCards);
ALSA_RegGetBoolean(key, "AutoScanDevices", &AutoScanDevices);
ALSA_RegGetBoolean(key, "UseDirectHW", &UseDirectHW);
ALSA_RegGetInt(key, "DeviceCount", &DeviceCount);
}
if (AutoScanCards)
ALSA_PerformDefaultScan(UseDirectHW, AutoScanDevices);
for (i = 0; i < DeviceCount; i++)
{
char *ctl_name = NULL;
char *pcm_name = NULL;
char value[30];
sprintf(value, "DevicePCM%d", i + 1);
if (ALSA_RegGetString(key, value, &pcm_name) == ERROR_SUCCESS)
{
sprintf(value, "DeviceCTL%d", i + 1);
ALSA_RegGetString(key, value, &ctl_name);
ALSA_AddUserSpecifiedDevice(ctl_name, pcm_name);
}
HeapFree(GetProcessHeap(), 0, ctl_name);
HeapFree(GetProcessHeap(), 0, pcm_name);
}
if (key)
RegCloseKey(key);
}
#endif /* HAVE_ALSA */
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