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wine/dlls/winealsa.drv/alsa.c

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/*
* Copyright 2010 Maarten Lankhorst for CodeWeavers
* Copyright 2011 Andrew Eikum for CodeWeavers
* Copyright 2022 Huw Davies
*
* 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
*/
#if 0
#pragma makedep unix
#endif
#include "config.h"
#include <stdarg.h>
#include <stdio.h>
#include <pthread.h>
#include <alsa/asoundlib.h>
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winbase.h"
#include "winternl.h"
#include "initguid.h"
#include "mmdeviceapi.h"
#include "wine/debug.h"
#include "wine/list.h"
#include "wine/unixlib.h"
#include "unixlib.h"
WINE_DEFAULT_DEBUG_CHANNEL(alsa);
struct alsa_stream
{
snd_pcm_t *pcm_handle;
snd_pcm_uframes_t alsa_bufsize_frames, alsa_period_frames, safe_rewind_frames;
snd_pcm_hw_params_t *hw_params; /* does not hold state between calls */
snd_pcm_format_t alsa_format;
LARGE_INTEGER last_period_time;
WAVEFORMATEX *fmt;
DWORD flags;
AUDCLNT_SHAREMODE share;
EDataFlow flow;
HANDLE event;
BOOL need_remapping;
int alsa_channels;
int alsa_channel_map[32];
BOOL started, please_quit;
REFERENCE_TIME mmdev_period_rt;
UINT64 written_frames, last_pos_frames;
UINT32 bufsize_frames, held_frames, tmp_buffer_frames, mmdev_period_frames;
snd_pcm_uframes_t remapping_buf_frames;
UINT32 lcl_offs_frames; /* offs into local_buffer where valid data starts */
UINT32 wri_offs_frames; /* where to write fresh data in local_buffer */
UINT32 hidden_frames; /* ALSA reserve to ensure continuous rendering */
UINT32 vol_adjusted_frames; /* Frames we've already adjusted the volume of but didn't write yet */
UINT32 data_in_alsa_frames;
BYTE *local_buffer, *tmp_buffer, *remapping_buf, *silence_buf;
LONG32 getbuf_last; /* <0 when using tmp_buffer */
float *vols;
pthread_mutex_t lock;
};
#define EXTRA_SAFE_RT 40000
static const REFERENCE_TIME def_period = 100000;
static const REFERENCE_TIME min_period = 50000;
static const WCHAR drv_keyW[] = {'S','o','f','t','w','a','r','e','\\',
'W','i','n','e','\\','D','r','i','v','e','r','s','\\',
'w','i','n','e','a','l','s','a','.','d','r','v'};
static ULONG_PTR zero_bits = 0;
static NTSTATUS alsa_not_implemented(void *args)
{
return STATUS_SUCCESS;
}
static inline void ascii_to_unicode( WCHAR *dst, const char *src, size_t len )
{
while (len--) *dst++ = (unsigned char)*src++;
}
static HKEY reg_open_key( HKEY root, const WCHAR *name, ULONG name_len )
{
UNICODE_STRING nameW = { name_len, name_len, (WCHAR *)name };
OBJECT_ATTRIBUTES attr;
HANDLE ret;
attr.Length = sizeof(attr);
attr.RootDirectory = root;
attr.ObjectName = &nameW;
attr.Attributes = 0;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
if (NtOpenKeyEx( &ret, MAXIMUM_ALLOWED, &attr, 0 )) return 0;
return ret;
}
static HKEY open_hkcu(void)
{
char buffer[256];
WCHAR bufferW[256];
DWORD_PTR sid_data[(sizeof(TOKEN_USER) + SECURITY_MAX_SID_SIZE) / sizeof(DWORD_PTR)];
DWORD i, len = sizeof(sid_data);
SID *sid;
if (NtQueryInformationToken( GetCurrentThreadEffectiveToken(), TokenUser, sid_data, len, &len ))
return 0;
sid = ((TOKEN_USER *)sid_data)->User.Sid;
len = sprintf( buffer, "\\Registry\\User\\S-%u-%u", sid->Revision,
(unsigned)MAKELONG( MAKEWORD( sid->IdentifierAuthority.Value[5], sid->IdentifierAuthority.Value[4] ),
MAKEWORD( sid->IdentifierAuthority.Value[3], sid->IdentifierAuthority.Value[2] )));
for (i = 0; i < sid->SubAuthorityCount; i++)
len += sprintf( buffer + len, "-%u", (unsigned)sid->SubAuthority[i] );
ascii_to_unicode( bufferW, buffer, len + 1 );
return reg_open_key( NULL, bufferW, len * sizeof(WCHAR) );
}
static HKEY reg_open_hkcu_key( const WCHAR *name, ULONG name_len )
{
HKEY hkcu = open_hkcu(), key;
key = reg_open_key( hkcu, name, name_len );
NtClose( hkcu );
return key;
}
static ULONG reg_query_value( HKEY hkey, const WCHAR *name,
KEY_VALUE_PARTIAL_INFORMATION *info, ULONG size )
{
unsigned int name_size = name ? wcslen( name ) * sizeof(WCHAR) : 0;
UNICODE_STRING nameW = { name_size, name_size, (WCHAR *)name };
if (NtQueryValueKey( hkey, &nameW, KeyValuePartialInformation,
info, size, &size ))
return 0;
return size - FIELD_OFFSET(KEY_VALUE_PARTIAL_INFORMATION, Data);
}
static snd_pcm_stream_t alsa_get_direction(EDataFlow flow)
{
return (flow == eRender) ? SND_PCM_STREAM_PLAYBACK : SND_PCM_STREAM_CAPTURE;
}
static WCHAR *strdupAtoW(const char *str)
{
unsigned int len;
WCHAR *ret;
if(!str) return NULL;
len = strlen(str) + 1;
ret = malloc(len * sizeof(WCHAR));
if(ret) ntdll_umbstowcs(str, len, ret, len);
return ret;
}
/* copied from kernelbase */
static int muldiv( int a, int b, int c )
{
LONGLONG ret;
if (!c) return -1;
/* We want to deal with a positive divisor to simplify the logic. */
if (c < 0)
{
a = -a;
c = -c;
}
/* If the result is positive, we "add" to round. else, we subtract to round. */
if ((a < 0 && b < 0) || (a >= 0 && b >= 0))
ret = (((LONGLONG)a * b) + (c / 2)) / c;
else
ret = (((LONGLONG)a * b) - (c / 2)) / c;
if (ret > 2147483647 || ret < -2147483647) return -1;
return ret;
}
static void alsa_lock(struct alsa_stream *stream)
{
pthread_mutex_lock(&stream->lock);
}
static void alsa_unlock(struct alsa_stream *stream)
{
pthread_mutex_unlock(&stream->lock);
}
static NTSTATUS alsa_unlock_result(struct alsa_stream *stream,
HRESULT *result, HRESULT value)
{
*result = value;
alsa_unlock(stream);
return STATUS_SUCCESS;
}
static struct alsa_stream *handle_get_stream(stream_handle h)
{
return (struct alsa_stream *)(UINT_PTR)h;
}
static BOOL alsa_try_open(const char *devnode, EDataFlow flow)
{
snd_pcm_t *handle;
int err;
TRACE("devnode: %s, flow: %d\n", devnode, flow);
if((err = snd_pcm_open(&handle, devnode, alsa_get_direction(flow), SND_PCM_NONBLOCK)) < 0){
WARN("The device \"%s\" failed to open: %d (%s).\n", devnode, err, snd_strerror(err));
return FALSE;
}
snd_pcm_close(handle);
return TRUE;
}
static WCHAR *construct_device_id(EDataFlow flow, const WCHAR *chunk1, const WCHAR *chunk2)
{
WCHAR *ret;
const WCHAR *prefix;
size_t len_wchars = 0, chunk1_len = 0, chunk2_len = 0, copied = 0, prefix_len;
static const WCHAR dashW[] = {' ','-',' ',0};
static const size_t dashW_len = ARRAY_SIZE(dashW) - 1;
static const WCHAR outW[] = {'O','u','t',':',' ',0};
static const WCHAR inW[] = {'I','n',':',' ',0};
if(flow == eRender){
prefix = outW;
prefix_len = ARRAY_SIZE(outW) - 1;
len_wchars += prefix_len;
}else{
prefix = inW;
prefix_len = ARRAY_SIZE(inW) - 1;
len_wchars += prefix_len;
}
if(chunk1){
chunk1_len = wcslen(chunk1);
len_wchars += chunk1_len;
}
if(chunk1 && chunk2)
len_wchars += dashW_len;
if(chunk2){
chunk2_len = wcslen(chunk2);
len_wchars += chunk2_len;
}
len_wchars += 1; /* NULL byte */
ret = malloc(len_wchars * sizeof(WCHAR));
memcpy(ret, prefix, prefix_len * sizeof(WCHAR));
copied += prefix_len;
if(chunk1){
memcpy(ret + copied, chunk1, chunk1_len * sizeof(WCHAR));
copied += chunk1_len;
}
if(chunk1 && chunk2){
memcpy(ret + copied, dashW, dashW_len * sizeof(WCHAR));
copied += dashW_len;
}
if(chunk2){
memcpy(ret + copied, chunk2, chunk2_len * sizeof(WCHAR));
copied += chunk2_len;
}
ret[copied] = 0;
TRACE("Enumerated device: %s\n", wine_dbgstr_w(ret));
return ret;
}
struct endpt
{
WCHAR *name;
char *device;
};
struct endpoints_info
{
unsigned int num, size;
struct endpt *endpoints;
};
static void endpoints_add(struct endpoints_info *endpoints, WCHAR *name, char *device)
{
if(endpoints->num >= endpoints->size){
if (!endpoints->size) endpoints->size = 16;
else endpoints->size *= 2;
endpoints->endpoints = realloc(endpoints->endpoints, endpoints->size * sizeof(*endpoints->endpoints));
}
endpoints->endpoints[endpoints->num].name = name;
endpoints->endpoints[endpoints->num++].device = device;
}
static HRESULT alsa_get_card_devices(EDataFlow flow, struct endpoints_info *endpoints_info,
snd_ctl_t *ctl, int card, const WCHAR *cardname)
{
int err, device;
snd_pcm_info_t *info;
info = calloc(1, snd_pcm_info_sizeof());
if(!info)
return E_OUTOFMEMORY;
snd_pcm_info_set_subdevice(info, 0);
snd_pcm_info_set_stream(info, alsa_get_direction(flow));
device = -1;
for(err = snd_ctl_pcm_next_device(ctl, &device); device != -1 && err >= 0;
err = snd_ctl_pcm_next_device(ctl, &device)){
char devnode[32];
WCHAR *devname;
snd_pcm_info_set_device(info, device);
if((err = snd_ctl_pcm_info(ctl, info)) < 0){
if(err == -ENOENT)
/* This device doesn't have the right stream direction */
continue;
WARN("Failed to get info for card %d, device %d: %d (%s)\n",
card, device, err, snd_strerror(err));
continue;
}
sprintf(devnode, "plughw:%d,%d", card, device);
if(!alsa_try_open(devnode, flow))
continue;
devname = strdupAtoW(snd_pcm_info_get_name(info));
if(!devname){
WARN("Unable to get device name for card %d, device %d\n", card, device);
continue;
}
endpoints_add(endpoints_info, construct_device_id(flow, cardname, devname), strdup(devnode));
free(devname);
}
free(info);
if(err != 0)
WARN("Got a failure during device enumeration on card %d: %d (%s)\n",
card, err, snd_strerror(err));
return S_OK;
}
static void get_reg_devices(EDataFlow flow, struct endpoints_info *endpoints_info)
{
static const WCHAR ALSAOutputDevices[] = {'A','L','S','A','O','u','t','p','u','t','D','e','v','i','c','e','s',0};
static const WCHAR ALSAInputDevices[] = {'A','L','S','A','I','n','p','u','t','D','e','v','i','c','e','s',0};
char buffer[4096];
KEY_VALUE_PARTIAL_INFORMATION *key_info = (void *)buffer;
HKEY key;
DWORD size;
const WCHAR *value_name = (flow == eRender) ? ALSAOutputDevices : ALSAInputDevices;
/* @@ Wine registry key: HKCU\Software\Wine\Drivers\winealsa.drv */
if((key = reg_open_hkcu_key(drv_keyW, sizeof(drv_keyW)))){
if((size = reg_query_value(key, value_name, key_info, sizeof(buffer)))){
WCHAR *p = (WCHAR *)key_info->Data;
if(key_info->Type != REG_MULTI_SZ){
ERR("Registry ALSA device list value type must be REG_MULTI_SZ\n");
NtClose(key);
return;
}
while(*p){
int len = wcslen(p);
char *devname = malloc(len * 3 + 1);
ntdll_wcstoumbs(p, len + 1, devname, len * 3 + 1, FALSE);
if(alsa_try_open(devname, flow))
endpoints_add(endpoints_info, construct_device_id(flow, p, NULL), strdup(devname));
free(devname);
p += len + 1;
}
}
NtClose(key);
}
}
struct card_type {
struct list entry;
int first_card_number;
char string[1];
};
static struct list card_types = LIST_INIT(card_types);
static BOOL need_card_number(int card, const char *string)
{
struct card_type *cptr;
LIST_FOR_EACH_ENTRY(cptr, &card_types, struct card_type, entry)
{
if(!strcmp(string, cptr->string))
return card != cptr->first_card_number;
}
/* this is the first instance of string */
cptr = malloc(sizeof(struct card_type) + strlen(string));
if(!cptr)
/* Default to displaying card number if we can't track cards */
return TRUE;
cptr->first_card_number = card;
strcpy(cptr->string, string);
list_add_head(&card_types, &cptr->entry);
return FALSE;
}
static WCHAR *alsa_get_card_name(int card)
{
char *cardname;
WCHAR *ret;
int err;
if((err = snd_card_get_name(card, &cardname)) < 0){
/* FIXME: Should be localized */
WARN("Unable to get card name for ALSA device %d: %d (%s)\n", card, err, snd_strerror(err));
cardname = strdup("Unknown soundcard");
}
if(need_card_number(card, cardname)){
char *cardnameN;
/*
* For identical card names, second and subsequent instances get
* card number prefix to distinguish them (like Windows).
*/
if(asprintf(&cardnameN, "%u-%s", card, cardname) > 0){
free(cardname);
cardname = cardnameN;
}
}
ret = strdupAtoW(cardname);
free(cardname);
return ret;
}
static NTSTATUS alsa_process_attach(void *args)
{
#ifdef _WIN64
if (NtCurrentTeb()->WowTebOffset)
{
SYSTEM_BASIC_INFORMATION info;
NtQuerySystemInformation(SystemEmulationBasicInformation, &info, sizeof(info), NULL);
zero_bits = (ULONG_PTR)info.HighestUserAddress | 0x7fffffff;
}
#endif
return STATUS_SUCCESS;
}
static NTSTATUS alsa_main_loop(void *args)
{
struct main_loop_params *params = args;
NtSetEvent(params->event, NULL);
return STATUS_SUCCESS;
}
static NTSTATUS alsa_get_endpoint_ids(void *args)
{
static const WCHAR defaultW[] = {'d','e','f','a','u','l','t',0};
struct get_endpoint_ids_params *params = args;
struct endpoints_info endpoints_info;
unsigned int i, needed, name_len, device_len, offset;
struct endpoint *endpoint;
int err, card;
card = -1;
endpoints_info.num = endpoints_info.size = 0;
endpoints_info.endpoints = NULL;
if(alsa_try_open("default", params->flow))
endpoints_add(&endpoints_info, construct_device_id(params->flow, defaultW, NULL), strdup("default"));
get_reg_devices(params->flow, &endpoints_info);
for(err = snd_card_next(&card); card != -1 && err >= 0; err = snd_card_next(&card)){
char cardpath[64];
WCHAR *cardname;
snd_ctl_t *ctl;
sprintf(cardpath, "hw:%u", card);
if((err = snd_ctl_open(&ctl, cardpath, 0)) < 0){
WARN("Unable to open ctl for ALSA device %s: %d (%s)\n", cardpath,
err, snd_strerror(err));
continue;
}
cardname = alsa_get_card_name(card);
alsa_get_card_devices(params->flow, &endpoints_info, ctl, card, cardname);
free(cardname);
snd_ctl_close(ctl);
}
if(err != 0)
WARN("Got a failure during card enumeration: %d (%s)\n", err, snd_strerror(err));
offset = needed = endpoints_info.num * sizeof(*params->endpoints);
endpoint = params->endpoints;
for(i = 0; i < endpoints_info.num; i++){
name_len = wcslen(endpoints_info.endpoints[i].name) + 1;
device_len = strlen(endpoints_info.endpoints[i].device) + 1;
needed += name_len * sizeof(WCHAR) + ((device_len + 1) & ~1);
if(needed <= params->size){
endpoint->name = offset;
memcpy((char *)params->endpoints + offset, endpoints_info.endpoints[i].name, name_len * sizeof(WCHAR));
offset += name_len * sizeof(WCHAR);
endpoint->device = offset;
memcpy((char *)params->endpoints + offset, endpoints_info.endpoints[i].device, device_len);
offset += (device_len + 1) & ~1;
endpoint++;
}
free(endpoints_info.endpoints[i].name);
free(endpoints_info.endpoints[i].device);
}
free(endpoints_info.endpoints);
params->num = endpoints_info.num;
params->default_idx = 0;
if(needed > params->size){
params->size = needed;
params->result = HRESULT_FROM_WIN32(ERROR_INSUFFICIENT_BUFFER);
} else
params->result = S_OK;
return STATUS_SUCCESS;
}
static WAVEFORMATEXTENSIBLE *clone_format(const WAVEFORMATEX *fmt)
{
WAVEFORMATEXTENSIBLE *ret;
size_t size;
if(fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE)
size = sizeof(WAVEFORMATEXTENSIBLE);
else
size = sizeof(WAVEFORMATEX);
ret = malloc(size);
if(!ret)
return NULL;
memcpy(ret, fmt, size);
ret->Format.cbSize = size - sizeof(WAVEFORMATEX);
return ret;
}
static HRESULT alsa_open_device(const char *alsa_name, EDataFlow flow, snd_pcm_t **pcm_handle,
snd_pcm_hw_params_t **hw_params)
{
snd_pcm_stream_t pcm_stream;
int err;
if(flow == eRender)
pcm_stream = SND_PCM_STREAM_PLAYBACK;
else if(flow == eCapture)
pcm_stream = SND_PCM_STREAM_CAPTURE;
else
return E_UNEXPECTED;
err = snd_pcm_open(pcm_handle, alsa_name, pcm_stream, SND_PCM_NONBLOCK);
if(err < 0){
WARN("Unable to open PCM \"%s\": %d (%s)\n", alsa_name, err, snd_strerror(err));
switch(err){
case -EBUSY:
return AUDCLNT_E_DEVICE_IN_USE;
default:
return AUDCLNT_E_ENDPOINT_CREATE_FAILED;
}
}
*hw_params = malloc(snd_pcm_hw_params_sizeof());
if(!*hw_params){
snd_pcm_close(*pcm_handle);
return E_OUTOFMEMORY;
}
return S_OK;
}
static snd_pcm_format_t alsa_format(const WAVEFORMATEX *fmt)
{
snd_pcm_format_t format = SND_PCM_FORMAT_UNKNOWN;
const WAVEFORMATEXTENSIBLE *fmtex = (const WAVEFORMATEXTENSIBLE *)fmt;
if(fmt->wFormatTag == WAVE_FORMAT_PCM ||
(fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
IsEqualGUID(&fmtex->SubFormat, &KSDATAFORMAT_SUBTYPE_PCM))){
if(fmt->wBitsPerSample == 8)
format = SND_PCM_FORMAT_U8;
else if(fmt->wBitsPerSample == 16)
format = SND_PCM_FORMAT_S16_LE;
else if(fmt->wBitsPerSample == 24)
format = SND_PCM_FORMAT_S24_3LE;
else if(fmt->wBitsPerSample == 32)
format = SND_PCM_FORMAT_S32_LE;
else
WARN("Unsupported bit depth: %u\n", fmt->wBitsPerSample);
if(fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
fmt->wBitsPerSample != fmtex->Samples.wValidBitsPerSample){
if(fmtex->Samples.wValidBitsPerSample == 20 && fmt->wBitsPerSample == 24)
format = SND_PCM_FORMAT_S20_3LE;
else
WARN("Unsupported ValidBits: %u\n", fmtex->Samples.wValidBitsPerSample);
}
}else if(fmt->wFormatTag == WAVE_FORMAT_IEEE_FLOAT ||
(fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
IsEqualGUID(&fmtex->SubFormat, &KSDATAFORMAT_SUBTYPE_IEEE_FLOAT))){
if(fmt->wBitsPerSample == 32)
format = SND_PCM_FORMAT_FLOAT_LE;
else if(fmt->wBitsPerSample == 64)
format = SND_PCM_FORMAT_FLOAT64_LE;
else
WARN("Unsupported float size: %u\n", fmt->wBitsPerSample);
}else
WARN("Unknown wave format: %04x\n", fmt->wFormatTag);
return format;
}
static int alsa_channel_index(UINT flag)
{
switch(flag){
case SPEAKER_FRONT_LEFT:
return 0;
case SPEAKER_FRONT_RIGHT:
return 1;
case SPEAKER_BACK_LEFT:
return 2;
case SPEAKER_BACK_RIGHT:
return 3;
case SPEAKER_FRONT_CENTER:
return 4;
case SPEAKER_LOW_FREQUENCY:
return 5;
case SPEAKER_SIDE_LEFT:
return 6;
case SPEAKER_SIDE_RIGHT:
return 7;
}
return -1;
}
static BOOL need_remapping(const WAVEFORMATEX *fmt, int *map)
{
unsigned int i;
for(i = 0; i < fmt->nChannels; ++i){
if(map[i] != i)
return TRUE;
}
return FALSE;
}
static DWORD get_channel_mask(unsigned int channels)
{
switch(channels){
case 0:
return 0;
case 1:
return KSAUDIO_SPEAKER_MONO;
case 2:
return KSAUDIO_SPEAKER_STEREO;
case 3:
return KSAUDIO_SPEAKER_STEREO | SPEAKER_LOW_FREQUENCY;
case 4:
return KSAUDIO_SPEAKER_QUAD; /* not _SURROUND */
case 5:
return KSAUDIO_SPEAKER_QUAD | SPEAKER_LOW_FREQUENCY;
case 6:
return KSAUDIO_SPEAKER_5POINT1; /* not 5POINT1_SURROUND */
case 7:
return KSAUDIO_SPEAKER_5POINT1 | SPEAKER_BACK_CENTER;
case 8:
return KSAUDIO_SPEAKER_7POINT1_SURROUND; /* Vista deprecates 7POINT1 */
}
FIXME("Unknown speaker configuration: %u\n", channels);
return 0;
}
static HRESULT map_channels(EDataFlow flow, const WAVEFORMATEX *fmt, int *alsa_channels, int *map)
{
BOOL need_remap;
if(flow != eCapture && (fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE || fmt->nChannels > 2) ){
WAVEFORMATEXTENSIBLE *fmtex = (void*)fmt;
UINT mask, flag = SPEAKER_FRONT_LEFT;
UINT i = 0;
if(fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
fmtex->dwChannelMask != 0)
mask = fmtex->dwChannelMask;
else
mask = get_channel_mask(fmt->nChannels);
*alsa_channels = 0;
while(i < fmt->nChannels && !(flag & SPEAKER_RESERVED)){
if(mask & flag){
map[i] = alsa_channel_index(flag);
TRACE("Mapping mmdevapi channel %u (0x%x) to ALSA channel %d\n",
i, flag, map[i]);
if(map[i] >= *alsa_channels)
*alsa_channels = map[i] + 1;
++i;
}
flag <<= 1;
}
while(i < fmt->nChannels){
map[i] = *alsa_channels;
TRACE("Mapping mmdevapi channel %u to ALSA channel %d\n",
i, map[i]);
++*alsa_channels;
++i;
}
for(i = 0; i < fmt->nChannels; ++i){
if(map[i] == -1){
map[i] = *alsa_channels;
++*alsa_channels;
TRACE("Remapping mmdevapi channel %u to ALSA channel %d\n",
i, map[i]);
}
}
need_remap = need_remapping(fmt, map);
}else{
*alsa_channels = fmt->nChannels;
need_remap = FALSE;
}
TRACE("need_remapping: %u, alsa_channels: %d\n", need_remap, *alsa_channels);
return need_remap ? S_OK : S_FALSE;
}
static void silence_buffer(struct alsa_stream *stream, BYTE *buffer, UINT32 frames)
{
WAVEFORMATEXTENSIBLE *fmtex = (WAVEFORMATEXTENSIBLE*)stream->fmt;
if((stream->fmt->wFormatTag == WAVE_FORMAT_PCM ||
(stream->fmt->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
IsEqualGUID(&fmtex->SubFormat, &KSDATAFORMAT_SUBTYPE_PCM))) &&
stream->fmt->wBitsPerSample == 8)
memset(buffer, 128, frames * stream->fmt->nBlockAlign);
else
memset(buffer, 0, frames * stream->fmt->nBlockAlign);
}
static NTSTATUS alsa_create_stream(void *args)
{
struct create_stream_params *params = args;
struct alsa_stream *stream;
snd_pcm_sw_params_t *sw_params = NULL;
snd_pcm_format_t format;
unsigned int rate, alsa_period_us, i;
WAVEFORMATEXTENSIBLE *fmtex = (WAVEFORMATEXTENSIBLE *)params->fmt;
int err;
SIZE_T size;
params->result = S_OK;
if (params->share == AUDCLNT_SHAREMODE_SHARED) {
params->period = def_period;
if (params->duration < 3 * params->period)
params->duration = 3 * params->period;
} else {
if (fmtex->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
(fmtex->dwChannelMask == 0 || fmtex->dwChannelMask & SPEAKER_RESERVED))
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
else {
if (!params->period)
params->period = def_period;
if (params->period < min_period || params->period > 5000000)
params->result = AUDCLNT_E_INVALID_DEVICE_PERIOD;
else if (params->duration > 20000000) /* The smaller the period, the lower this limit. */
params->result = AUDCLNT_E_BUFFER_SIZE_ERROR;
else if (params->flags & AUDCLNT_STREAMFLAGS_EVENTCALLBACK) {
if (params->duration != params->period)
params->result = AUDCLNT_E_BUFDURATION_PERIOD_NOT_EQUAL;
FIXME("EXCLUSIVE mode with EVENTCALLBACK\n");
params->result = AUDCLNT_E_DEVICE_IN_USE;
} else if (params->duration < 8 * params->period)
params->duration = 8 * params->period; /* May grow above 2s. */
}
}
if (FAILED(params->result))
return STATUS_SUCCESS;
stream = calloc(1, sizeof(*stream));
if(!stream){
params->result = E_OUTOFMEMORY;
return STATUS_SUCCESS;
}
params->result = alsa_open_device(params->device, params->flow, &stream->pcm_handle, &stream->hw_params);
if(FAILED(params->result)){
free(stream);
return STATUS_SUCCESS;
}
stream->need_remapping = map_channels(params->flow, params->fmt, &stream->alsa_channels, stream->alsa_channel_map) == S_OK;
if((err = snd_pcm_hw_params_any(stream->pcm_handle, stream->hw_params)) < 0){
WARN("Unable to get hw_params: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
if((err = snd_pcm_hw_params_set_access(stream->pcm_handle, stream->hw_params,
SND_PCM_ACCESS_RW_INTERLEAVED)) < 0){
WARN("Unable to set access: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
format = alsa_format(params->fmt);
if (format == SND_PCM_FORMAT_UNKNOWN){
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
goto exit;
}
if((err = snd_pcm_hw_params_set_format(stream->pcm_handle, stream->hw_params,
format)) < 0){
WARN("Unable to set ALSA format to %u: %d (%s)\n", format, err,
snd_strerror(err));
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
goto exit;
}
stream->alsa_format = format;
stream->flow = params->flow;
rate = params->fmt->nSamplesPerSec;
if((err = snd_pcm_hw_params_set_rate_near(stream->pcm_handle, stream->hw_params,
&rate, NULL)) < 0){
WARN("Unable to set rate to %u: %d (%s)\n", rate, err,
snd_strerror(err));
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
goto exit;
}
if((err = snd_pcm_hw_params_set_channels(stream->pcm_handle, stream->hw_params,
stream->alsa_channels)) < 0){
WARN("Unable to set channels to %u: %d (%s)\n", params->fmt->nChannels, err,
snd_strerror(err));
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
goto exit;
}
stream->mmdev_period_rt = params->period;
alsa_period_us = stream->mmdev_period_rt / 10;
if((err = snd_pcm_hw_params_set_period_time_near(stream->pcm_handle,
stream->hw_params, &alsa_period_us, NULL)) < 0)
WARN("Unable to set period time near %u: %d (%s)\n", alsa_period_us,
err, snd_strerror(err));
/* ALSA updates the output variable alsa_period_us */
stream->mmdev_period_frames = muldiv(params->fmt->nSamplesPerSec,
stream->mmdev_period_rt, 10000000);
/* Buffer 4 ALSA periods if large enough, else 4 mmdevapi periods */
stream->alsa_bufsize_frames = stream->mmdev_period_frames * 4;
if(err < 0 || alsa_period_us < params->period / 10)
err = snd_pcm_hw_params_set_buffer_size_near(stream->pcm_handle,
stream->hw_params, &stream->alsa_bufsize_frames);
else{
unsigned int periods = 4;
err = snd_pcm_hw_params_set_periods_near(stream->pcm_handle, stream->hw_params, &periods, NULL);
}
if(err < 0)
WARN("Unable to set buffer size: %d (%s)\n", err, snd_strerror(err));
if((err = snd_pcm_hw_params(stream->pcm_handle, stream->hw_params)) < 0){
WARN("Unable to set hw params: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
if((err = snd_pcm_hw_params_get_period_size(stream->hw_params,
&stream->alsa_period_frames, NULL)) < 0){
WARN("Unable to get period size: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
if((err = snd_pcm_hw_params_get_buffer_size(stream->hw_params,
&stream->alsa_bufsize_frames)) < 0){
WARN("Unable to get buffer size: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
sw_params = calloc(1, snd_pcm_sw_params_sizeof());
if(!sw_params){
params->result = E_OUTOFMEMORY;
goto exit;
}
if((err = snd_pcm_sw_params_current(stream->pcm_handle, sw_params)) < 0){
WARN("Unable to get sw_params: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
if((err = snd_pcm_sw_params_set_start_threshold(stream->pcm_handle,
sw_params, 1)) < 0){
WARN("Unable set start threshold to 1: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
if((err = snd_pcm_sw_params_set_stop_threshold(stream->pcm_handle,
sw_params, stream->alsa_bufsize_frames)) < 0){
WARN("Unable set stop threshold to %lu: %d (%s)\n",
stream->alsa_bufsize_frames, err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
if((err = snd_pcm_sw_params(stream->pcm_handle, sw_params)) < 0){
WARN("Unable to set sw params: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
if((err = snd_pcm_prepare(stream->pcm_handle)) < 0){
WARN("Unable to prepare device: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_ENDPOINT_CREATE_FAILED;
goto exit;
}
/* Bear in mind weird situations where
* ALSA period (50ms) > mmdevapi buffer (3x10ms)
* or surprising rounding as seen with 22050x8x1 with Pulse:
* ALSA period 220 vs. 221 frames in mmdevapi and
* buffer 883 vs. 2205 frames in mmdevapi! */
stream->bufsize_frames = muldiv(params->duration, params->fmt->nSamplesPerSec, 10000000);
if(params->share == AUDCLNT_SHAREMODE_EXCLUSIVE)
stream->bufsize_frames -= stream->bufsize_frames % stream->mmdev_period_frames;
stream->hidden_frames = stream->alsa_period_frames + stream->mmdev_period_frames +
muldiv(params->fmt->nSamplesPerSec, EXTRA_SAFE_RT, 10000000);
/* leave no less than about 1.33ms or 256 bytes of data after a rewind */
stream->safe_rewind_frames = max(256 / params->fmt->nBlockAlign, muldiv(133, params->fmt->nSamplesPerSec, 100000));
/* Check if the ALSA buffer is so small that it will run out before
* the next MMDevAPI period tick occurs. Allow a little wiggle room
* with 120% of the period time. */
if(stream->alsa_bufsize_frames < 1.2 * stream->mmdev_period_frames)
FIXME("ALSA buffer time is too small. Expect underruns. (%lu < %u * 1.2)\n",
stream->alsa_bufsize_frames, stream->mmdev_period_frames);
fmtex = clone_format(params->fmt);
if(!fmtex){
params->result = E_OUTOFMEMORY;
goto exit;
}
stream->fmt = &fmtex->Format;
size = stream->bufsize_frames * params->fmt->nBlockAlign;
if(NtAllocateVirtualMemory(GetCurrentProcess(), (void **)&stream->local_buffer, zero_bits, &size,
MEM_COMMIT, PAGE_READWRITE)){
params->result = E_OUTOFMEMORY;
goto exit;
}
silence_buffer(stream, stream->local_buffer, stream->bufsize_frames);
stream->silence_buf = malloc(stream->alsa_period_frames * stream->fmt->nBlockAlign);
if(!stream->silence_buf){
params->result = E_OUTOFMEMORY;
goto exit;
}
silence_buffer(stream, stream->silence_buf, stream->alsa_period_frames);
stream->vols = malloc(params->fmt->nChannels * sizeof(float));
if(!stream->vols){
params->result = E_OUTOFMEMORY;
goto exit;
}
for(i = 0; i < params->fmt->nChannels; ++i)
stream->vols[i] = 1.f;
stream->share = params->share;
stream->flags = params->flags;
pthread_mutex_init(&stream->lock, NULL);
TRACE("ALSA period: %lu frames\n", stream->alsa_period_frames);
TRACE("ALSA buffer: %lu frames\n", stream->alsa_bufsize_frames);
TRACE("MMDevice period: %u frames\n", stream->mmdev_period_frames);
TRACE("MMDevice buffer: %u frames\n", stream->bufsize_frames);
exit:
free(sw_params);
if(FAILED(params->result)){
snd_pcm_close(stream->pcm_handle);
if(stream->local_buffer){
size = 0;
NtFreeVirtualMemory(GetCurrentProcess(), (void **)&stream->local_buffer, &size, MEM_RELEASE);
}
free(stream->silence_buf);
free(stream->hw_params);
free(stream->fmt);
free(stream->vols);
free(stream);
}else{
*params->channel_count = params->fmt->nChannels;
*params->stream = (stream_handle)(UINT_PTR)stream;
}
return STATUS_SUCCESS;
}
static NTSTATUS alsa_release_stream(void *args)
{
struct release_stream_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
SIZE_T size;
if(params->timer_thread){
stream->please_quit = TRUE;
NtWaitForSingleObject(params->timer_thread, FALSE, NULL);
NtClose(params->timer_thread);
}
snd_pcm_drop(stream->pcm_handle);
snd_pcm_close(stream->pcm_handle);
if(stream->local_buffer){
size = 0;
NtFreeVirtualMemory(GetCurrentProcess(), (void **)&stream->local_buffer, &size, MEM_RELEASE);
}
if(stream->tmp_buffer){
size = 0;
NtFreeVirtualMemory(GetCurrentProcess(), (void **)&stream->tmp_buffer, &size, MEM_RELEASE);
}
free(stream->remapping_buf);
free(stream->silence_buf);
free(stream->hw_params);
free(stream->fmt);
free(stream->vols);
pthread_mutex_destroy(&stream->lock);
free(stream);
params->result = S_OK;
return STATUS_SUCCESS;
}
static BYTE *remap_channels(struct alsa_stream *stream, BYTE *buf, snd_pcm_uframes_t frames)
{
snd_pcm_uframes_t i;
UINT c;
UINT bytes_per_sample = stream->fmt->wBitsPerSample / 8;
if(!stream->need_remapping)
return buf;
if(stream->remapping_buf_frames < frames){
stream->remapping_buf = realloc(stream->remapping_buf,
bytes_per_sample * stream->alsa_channels * frames);
stream->remapping_buf_frames = frames;
}
snd_pcm_format_set_silence(stream->alsa_format, stream->remapping_buf,
frames * stream->alsa_channels);
switch(stream->fmt->wBitsPerSample){
case 8: {
UINT8 *tgt_buf, *src_buf;
tgt_buf = stream->remapping_buf;
src_buf = buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < stream->fmt->nChannels; ++c)
tgt_buf[stream->alsa_channel_map[c]] = src_buf[c];
tgt_buf += stream->alsa_channels;
src_buf += stream->fmt->nChannels;
}
break;
}
case 16: {
UINT16 *tgt_buf, *src_buf;
tgt_buf = (UINT16*)stream->remapping_buf;
src_buf = (UINT16*)buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < stream->fmt->nChannels; ++c)
tgt_buf[stream->alsa_channel_map[c]] = src_buf[c];
tgt_buf += stream->alsa_channels;
src_buf += stream->fmt->nChannels;
}
}
break;
case 32: {
UINT32 *tgt_buf, *src_buf;
tgt_buf = (UINT32*)stream->remapping_buf;
src_buf = (UINT32*)buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < stream->fmt->nChannels; ++c)
tgt_buf[stream->alsa_channel_map[c]] = src_buf[c];
tgt_buf += stream->alsa_channels;
src_buf += stream->fmt->nChannels;
}
}
break;
default: {
BYTE *tgt_buf, *src_buf;
tgt_buf = stream->remapping_buf;
src_buf = buf;
for(i = 0; i < frames; ++i){
for(c = 0; c < stream->fmt->nChannels; ++c)
memcpy(&tgt_buf[stream->alsa_channel_map[c] * bytes_per_sample],
&src_buf[c * bytes_per_sample], bytes_per_sample);
tgt_buf += stream->alsa_channels * bytes_per_sample;
src_buf += stream->fmt->nChannels * bytes_per_sample;
}
}
break;
}
return stream->remapping_buf;
}
static void adjust_buffer_volume(const struct alsa_stream *stream, BYTE *buf, snd_pcm_uframes_t frames)
{
BOOL adjust = FALSE;
UINT32 i, channels, mute = 0;
BYTE *end;
if (stream->vol_adjusted_frames >= frames)
return;
channels = stream->fmt->nChannels;
/* Adjust the buffer based on the volume for each channel */
for (i = 0; i < channels; i++)
{
adjust |= stream->vols[i] != 1.0f;
if (stream->vols[i] == 0.0f)
mute++;
}
if (mute == channels)
{
int err = snd_pcm_format_set_silence(stream->alsa_format, buf, frames * channels);
if (err < 0)
WARN("Setting buffer to silence failed: %d (%s)\n", err, snd_strerror(err));
return;
}
if (!adjust) return;
/* Skip the frames we've already adjusted before */
end = buf + frames * stream->fmt->nBlockAlign;
buf += stream->vol_adjusted_frames * stream->fmt->nBlockAlign;
switch (stream->alsa_format)
{
#ifndef WORDS_BIGENDIAN
#define PROCESS_BUFFER(type) do \
{ \
type *p = (type*)buf; \
do \
{ \
for (i = 0; i < channels; i++) \
p[i] = p[i] * stream->vols[i]; \
p += i; \
} while ((BYTE*)p != end); \
} while (0)
case SND_PCM_FORMAT_S16_LE:
PROCESS_BUFFER(INT16);
break;
case SND_PCM_FORMAT_S32_LE:
PROCESS_BUFFER(INT32);
break;
case SND_PCM_FORMAT_FLOAT_LE:
PROCESS_BUFFER(float);
break;
case SND_PCM_FORMAT_FLOAT64_LE:
PROCESS_BUFFER(double);
break;
#undef PROCESS_BUFFER
case SND_PCM_FORMAT_S20_3LE:
case SND_PCM_FORMAT_S24_3LE:
{
/* Do it 12 bytes at a time until it is no longer possible */
UINT32 *q = (UINT32*)buf, mask = ~0xff;
BYTE *p;
/* After we adjust the volume, we need to mask out low bits */
if (stream->alsa_format == SND_PCM_FORMAT_S20_3LE)
mask = ~0x0fff;
i = 0;
while (end - (BYTE*)q >= 12)
{
UINT32 v[4], k;
v[0] = q[0] << 8;
v[1] = q[1] << 16 | (q[0] >> 16 & ~0xff);
v[2] = q[2] << 24 | (q[1] >> 8 & ~0xff);
v[3] = q[2] & ~0xff;
for (k = 0; k < 4; k++)
{
v[k] = (INT32)((INT32)v[k] * stream->vols[i]);
v[k] &= mask;
if (++i == channels) i = 0;
}
*q++ = v[0] >> 8 | v[1] << 16;
*q++ = v[1] >> 16 | v[2] << 8;
*q++ = v[2] >> 24 | v[3];
}
p = (BYTE*)q;
while (p != end)
{
UINT32 v = (INT32)((INT32)(p[0] << 8 | p[1] << 16 | p[2] << 24) * stream->vols[i]);
v &= mask;
*p++ = v >> 8 & 0xff;
*p++ = v >> 16 & 0xff;
*p++ = v >> 24;
if (++i == channels) i = 0;
}
break;
}
#endif
case SND_PCM_FORMAT_U8:
{
UINT8 *p = (UINT8*)buf;
do
{
for (i = 0; i < channels; i++)
p[i] = (int)((p[i] - 128) * stream->vols[i]) + 128;
p += i;
} while ((BYTE*)p != end);
break;
}
default:
TRACE("Unhandled format %i, not adjusting volume.\n", stream->alsa_format);
break;
}
}
static snd_pcm_sframes_t alsa_write_best_effort(struct alsa_stream *stream, BYTE *buf, snd_pcm_uframes_t frames)
{
snd_pcm_sframes_t written;
adjust_buffer_volume(stream, buf, frames);
/* Mark the frames we've already adjusted */
if (stream->vol_adjusted_frames < frames)
stream->vol_adjusted_frames = frames;
buf = remap_channels(stream, buf, frames);
written = snd_pcm_writei(stream->pcm_handle, buf, frames);
if(written < 0){
int ret;
if(written == -EAGAIN)
/* buffer full */
return 0;
WARN("writei failed, recovering: %ld (%s)\n", written,
snd_strerror(written));
ret = snd_pcm_recover(stream->pcm_handle, written, 0);
if(ret < 0){
WARN("Could not recover: %d (%s)\n", ret, snd_strerror(ret));
return ret;
}
written = snd_pcm_writei(stream->pcm_handle, buf, frames);
}
if (written > 0)
stream->vol_adjusted_frames -= written;
return written;
}
static snd_pcm_sframes_t alsa_write_buffer_wrap(struct alsa_stream *stream, BYTE *buf,
snd_pcm_uframes_t buflen, snd_pcm_uframes_t offs,
snd_pcm_uframes_t to_write)
{
snd_pcm_sframes_t ret = 0;
while(to_write){
snd_pcm_uframes_t chunk;
snd_pcm_sframes_t tmp;
if(offs + to_write > buflen)
chunk = buflen - offs;
else
chunk = to_write;
tmp = alsa_write_best_effort(stream, buf + offs * stream->fmt->nBlockAlign, chunk);
if(tmp < 0)
return ret;
if(!tmp)
break;
ret += tmp;
to_write -= tmp;
offs += tmp;
offs %= buflen;
}
return ret;
}
static UINT buf_ptr_diff(UINT left, UINT right, UINT bufsize)
{
if(left <= right)
return right - left;
return bufsize - (left - right);
}
static UINT data_not_in_alsa(struct alsa_stream *stream)
{
UINT32 diff;
diff = buf_ptr_diff(stream->lcl_offs_frames, stream->wri_offs_frames, stream->bufsize_frames);
if(diff)
return diff;
return stream->held_frames - stream->data_in_alsa_frames;
}
/* Here's the buffer setup:
*
* vvvvvvvv sent to HW already
* vvvvvvvv in ALSA buffer but rewindable
* [dddddddddddddddd] ALSA buffer
* [dddddddddddddddd--------] mmdevapi buffer
* ^^^^^^^^ data_in_alsa_frames
* ^^^^^^^^^^^^^^^^ held_frames
* ^ lcl_offs_frames
* ^ wri_offs_frames
*
* GetCurrentPadding is held_frames
*
* During period callback, we decrement held_frames, fill ALSA buffer, and move
* lcl_offs forward
*
* During Stop, we rewind the ALSA buffer
*/
static void alsa_write_data(struct alsa_stream *stream)
{
snd_pcm_sframes_t written;
snd_pcm_uframes_t avail, max_copy_frames, data_frames_played;
int err;
/* this call seems to be required to get an accurate snd_pcm_state() */
avail = snd_pcm_avail_update(stream->pcm_handle);
if(snd_pcm_state(stream->pcm_handle) == SND_PCM_STATE_XRUN){
TRACE("XRun state, recovering\n");
avail = stream->alsa_bufsize_frames;
if((err = snd_pcm_recover(stream->pcm_handle, -EPIPE, 1)) < 0)
WARN("snd_pcm_recover failed: %d (%s)\n", err, snd_strerror(err));
if((err = snd_pcm_reset(stream->pcm_handle)) < 0)
WARN("snd_pcm_reset failed: %d (%s)\n", err, snd_strerror(err));
if((err = snd_pcm_prepare(stream->pcm_handle)) < 0)
WARN("snd_pcm_prepare failed: %d (%s)\n", err, snd_strerror(err));
}
TRACE("avail: %ld\n", avail);
/* Add a lead-in when starting with too few frames to ensure
* continuous rendering. Additional benefit: Force ALSA to start. */
if(stream->data_in_alsa_frames == 0 && stream->held_frames < stream->alsa_period_frames)
{
alsa_write_best_effort(stream, stream->silence_buf,
stream->alsa_period_frames - stream->held_frames);
stream->vol_adjusted_frames = 0;
}
if(stream->started)
max_copy_frames = data_not_in_alsa(stream);
else
max_copy_frames = 0;
data_frames_played = min(stream->data_in_alsa_frames, avail);
stream->data_in_alsa_frames -= data_frames_played;
if(stream->held_frames > data_frames_played){
if(stream->started)
stream->held_frames -= data_frames_played;
}else
stream->held_frames = 0;
while(avail && max_copy_frames){
snd_pcm_uframes_t to_write;
to_write = min(avail, max_copy_frames);
written = alsa_write_buffer_wrap(stream, stream->local_buffer,
stream->bufsize_frames, stream->lcl_offs_frames, to_write);
if(written <= 0)
break;
avail -= written;
stream->lcl_offs_frames += written;
stream->lcl_offs_frames %= stream->bufsize_frames;
stream->data_in_alsa_frames += written;
max_copy_frames -= written;
}
if(stream->event)
NtSetEvent(stream->event, NULL);
}
static void alsa_read_data(struct alsa_stream *stream)
{
snd_pcm_sframes_t nread;
UINT32 pos = stream->wri_offs_frames, limit = stream->held_frames;
unsigned int i;
if(!stream->started)
goto exit;
/* FIXME: Detect overrun and signal DATA_DISCONTINUITY
* How to count overrun frames and report them as position increase? */
limit = stream->bufsize_frames - max(limit, pos);
nread = snd_pcm_readi(stream->pcm_handle,
stream->local_buffer + pos * stream->fmt->nBlockAlign, limit);
TRACE("read %ld from %u limit %u\n", nread, pos, limit);
if(nread < 0){
int ret;
if(nread == -EAGAIN) /* no data yet */
return;
WARN("read failed, recovering: %ld (%s)\n", nread, snd_strerror(nread));
ret = snd_pcm_recover(stream->pcm_handle, nread, 0);
if(ret < 0){
WARN("Recover failed: %d (%s)\n", ret, snd_strerror(ret));
return;
}
nread = snd_pcm_readi(stream->pcm_handle,
stream->local_buffer + pos * stream->fmt->nBlockAlign, limit);
if(nread < 0){
WARN("read failed: %ld (%s)\n", nread, snd_strerror(nread));
return;
}
}
for(i = 0; i < stream->fmt->nChannels; i++)
if(stream->vols[i] != 0.0f)
break;
if(i == stream->fmt->nChannels){ /* mute */
int err;
if((err = snd_pcm_format_set_silence(stream->alsa_format,
stream->local_buffer + pos * stream->fmt->nBlockAlign,
nread)) < 0)
WARN("Setting buffer to silence failed: %d (%s)\n", err,
snd_strerror(err));
}
stream->wri_offs_frames += nread;
stream->wri_offs_frames %= stream->bufsize_frames;
stream->held_frames += nread;
exit:
if(stream->event)
NtSetEvent(stream->event, NULL);
}
static snd_pcm_uframes_t interp_elapsed_frames(struct alsa_stream *stream)
{
LARGE_INTEGER time_freq, current_time, time_diff;
NtQueryPerformanceCounter(&current_time, &time_freq);
time_diff.QuadPart = current_time.QuadPart - stream->last_period_time.QuadPart;
return muldiv(time_diff.QuadPart, stream->fmt->nSamplesPerSec, time_freq.QuadPart);
}
static int alsa_rewind_best_effort(struct alsa_stream *stream)
{
snd_pcm_uframes_t len, leave;
/* we can't use snd_pcm_rewindable, some PCM devices crash. so follow
* PulseAudio's example and rewind as much data as we believe is in the
* buffer, minus 1.33ms for safety. */
/* amount of data to leave in ALSA buffer */
leave = interp_elapsed_frames(stream) + stream->safe_rewind_frames;
if(stream->held_frames < leave)
stream->held_frames = 0;
else
stream->held_frames -= leave;
if(stream->data_in_alsa_frames < leave)
len = 0;
else
len = stream->data_in_alsa_frames - leave;
TRACE("rewinding %lu frames, now held %u\n", len, stream->held_frames);
if(len)
/* snd_pcm_rewind return value is often broken, assume it succeeded */
snd_pcm_rewind(stream->pcm_handle, len);
stream->data_in_alsa_frames = 0;
return len;
}
static NTSTATUS alsa_start(void *args)
{
struct start_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
if((stream->flags & AUDCLNT_STREAMFLAGS_EVENTCALLBACK) && !stream->event)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_EVENTHANDLE_NOT_SET);
if(stream->started)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_NOT_STOPPED);
if(stream->flow == eCapture){
/* dump any data that might be leftover in the ALSA capture buffer */
snd_pcm_readi(stream->pcm_handle, stream->local_buffer,
stream->bufsize_frames);
}else{
snd_pcm_sframes_t avail, written;
snd_pcm_uframes_t offs;
avail = snd_pcm_avail_update(stream->pcm_handle);
avail = min(avail, stream->held_frames);
if(stream->wri_offs_frames < stream->held_frames)
offs = stream->bufsize_frames - stream->held_frames + stream->wri_offs_frames;
else
offs = stream->wri_offs_frames - stream->held_frames;
/* fill it with data */
written = alsa_write_buffer_wrap(stream, stream->local_buffer,
stream->bufsize_frames, offs, avail);
if(written > 0){
stream->lcl_offs_frames = (offs + written) % stream->bufsize_frames;
stream->data_in_alsa_frames = written;
}else{
stream->lcl_offs_frames = offs;
stream->data_in_alsa_frames = 0;
}
}
stream->started = TRUE;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_stop(void *args)
{
struct stop_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
if(!stream->started)
return alsa_unlock_result(stream, &params->result, S_FALSE);
if(stream->flow == eRender)
alsa_rewind_best_effort(stream);
stream->started = FALSE;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_reset(void *args)
{
struct reset_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
if(stream->started)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_NOT_STOPPED);
if(stream->getbuf_last)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_BUFFER_OPERATION_PENDING);
if(snd_pcm_drop(stream->pcm_handle) < 0)
WARN("snd_pcm_drop failed\n");
if(snd_pcm_reset(stream->pcm_handle) < 0)
WARN("snd_pcm_reset failed\n");
if(snd_pcm_prepare(stream->pcm_handle) < 0)
WARN("snd_pcm_prepare failed\n");
if(stream->flow == eRender){
stream->written_frames = 0;
stream->last_pos_frames = 0;
}else{
stream->written_frames += stream->held_frames;
}
stream->held_frames = 0;
stream->lcl_offs_frames = 0;
stream->wri_offs_frames = 0;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_timer_loop(void *args)
{
struct timer_loop_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
LARGE_INTEGER delay, next;
int adjust;
alsa_lock(stream);
delay.QuadPart = -stream->mmdev_period_rt;
NtQueryPerformanceCounter(&stream->last_period_time, NULL);
next.QuadPart = stream->last_period_time.QuadPart + stream->mmdev_period_rt;
while(!stream->please_quit){
if(stream->flow == eRender)
alsa_write_data(stream);
else if(stream->flow == eCapture)
alsa_read_data(stream);
alsa_unlock(stream);
NtDelayExecution(FALSE, &delay);
alsa_lock(stream);
NtQueryPerformanceCounter(&stream->last_period_time, NULL);
adjust = next.QuadPart - stream->last_period_time.QuadPart;
if(adjust > stream->mmdev_period_rt / 2)
adjust = stream->mmdev_period_rt / 2;
else if(adjust < -stream->mmdev_period_rt / 2)
adjust = -stream->mmdev_period_rt / 2;
delay.QuadPart = -(stream->mmdev_period_rt + adjust);
next.QuadPart += stream->mmdev_period_rt;
}
alsa_unlock(stream);
return STATUS_SUCCESS;
}
static NTSTATUS alsa_get_render_buffer(void *args)
{
struct get_render_buffer_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
UINT32 write_pos, frames = params->frames;
SIZE_T size;
alsa_lock(stream);
if(stream->getbuf_last)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_OUT_OF_ORDER);
if(!frames)
return alsa_unlock_result(stream, &params->result, S_OK);
/* held_frames == GetCurrentPadding_nolock(); */
if(stream->held_frames + frames > stream->bufsize_frames)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_BUFFER_TOO_LARGE);
write_pos = stream->wri_offs_frames;
if(write_pos + frames > stream->bufsize_frames){
if(stream->tmp_buffer_frames < frames){
if(stream->tmp_buffer){
size = 0;
NtFreeVirtualMemory(GetCurrentProcess(), (void **)&stream->tmp_buffer, &size, MEM_RELEASE);
stream->tmp_buffer = NULL;
}
size = frames * stream->fmt->nBlockAlign;
if(NtAllocateVirtualMemory(GetCurrentProcess(), (void **)&stream->tmp_buffer, zero_bits, &size,
MEM_COMMIT, PAGE_READWRITE)){
stream->tmp_buffer_frames = 0;
return alsa_unlock_result(stream, &params->result, E_OUTOFMEMORY);
}
stream->tmp_buffer_frames = frames;
}
*params->data = stream->tmp_buffer;
stream->getbuf_last = -frames;
}else{
*params->data = stream->local_buffer + write_pos * stream->fmt->nBlockAlign;
stream->getbuf_last = frames;
}
silence_buffer(stream, *params->data, frames);
return alsa_unlock_result(stream, &params->result, S_OK);
}
static void alsa_wrap_buffer(struct alsa_stream *stream, BYTE *buffer, UINT32 written_frames)
{
snd_pcm_uframes_t write_offs_frames = stream->wri_offs_frames;
UINT32 write_offs_bytes = write_offs_frames * stream->fmt->nBlockAlign;
snd_pcm_uframes_t chunk_frames = stream->bufsize_frames - write_offs_frames;
UINT32 chunk_bytes = chunk_frames * stream->fmt->nBlockAlign;
UINT32 written_bytes = written_frames * stream->fmt->nBlockAlign;
if(written_bytes <= chunk_bytes){
memcpy(stream->local_buffer + write_offs_bytes, buffer, written_bytes);
}else{
memcpy(stream->local_buffer + write_offs_bytes, buffer, chunk_bytes);
memcpy(stream->local_buffer, buffer + chunk_bytes,
written_bytes - chunk_bytes);
}
}
static NTSTATUS alsa_release_render_buffer(void *args)
{
struct release_render_buffer_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
UINT32 written_frames = params->written_frames;
BYTE *buffer;
alsa_lock(stream);
if(!written_frames){
stream->getbuf_last = 0;
return alsa_unlock_result(stream, &params->result, S_OK);
}
if(!stream->getbuf_last)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_OUT_OF_ORDER);
if(written_frames > (stream->getbuf_last >= 0 ? stream->getbuf_last : -stream->getbuf_last))
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_INVALID_SIZE);
if(stream->getbuf_last >= 0)
buffer = stream->local_buffer + stream->wri_offs_frames * stream->fmt->nBlockAlign;
else
buffer = stream->tmp_buffer;
if(params->flags & AUDCLNT_BUFFERFLAGS_SILENT)
silence_buffer(stream, buffer, written_frames);
if(stream->getbuf_last < 0)
alsa_wrap_buffer(stream, buffer, written_frames);
stream->wri_offs_frames += written_frames;
stream->wri_offs_frames %= stream->bufsize_frames;
stream->held_frames += written_frames;
stream->written_frames += written_frames;
stream->getbuf_last = 0;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_get_capture_buffer(void *args)
{
struct get_capture_buffer_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
UINT32 *frames = params->frames;
SIZE_T size;
alsa_lock(stream);
if(stream->getbuf_last)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_OUT_OF_ORDER);
if(stream->held_frames < stream->mmdev_period_frames){
*frames = 0;
return alsa_unlock_result(stream, &params->result, AUDCLNT_S_BUFFER_EMPTY);
}
*frames = stream->mmdev_period_frames;
if(stream->lcl_offs_frames + *frames > stream->bufsize_frames){
UINT32 chunk_bytes, offs_bytes, frames_bytes;
if(stream->tmp_buffer_frames < *frames){
if(stream->tmp_buffer){
size = 0;
NtFreeVirtualMemory(GetCurrentProcess(), (void **)&stream->tmp_buffer, &size, MEM_RELEASE);
stream->tmp_buffer = NULL;
}
size = *frames * stream->fmt->nBlockAlign;
if(NtAllocateVirtualMemory(GetCurrentProcess(), (void **)&stream->tmp_buffer, zero_bits, &size,
MEM_COMMIT, PAGE_READWRITE)){
stream->tmp_buffer_frames = 0;
return alsa_unlock_result(stream, &params->result, E_OUTOFMEMORY);
}
stream->tmp_buffer_frames = *frames;
}
*params->data = stream->tmp_buffer;
chunk_bytes = (stream->bufsize_frames - stream->lcl_offs_frames) *
stream->fmt->nBlockAlign;
offs_bytes = stream->lcl_offs_frames * stream->fmt->nBlockAlign;
frames_bytes = *frames * stream->fmt->nBlockAlign;
memcpy(stream->tmp_buffer, stream->local_buffer + offs_bytes, chunk_bytes);
memcpy(stream->tmp_buffer + chunk_bytes, stream->local_buffer,
frames_bytes - chunk_bytes);
}else
*params->data = stream->local_buffer +
stream->lcl_offs_frames * stream->fmt->nBlockAlign;
stream->getbuf_last = *frames;
*params->flags = 0;
if(params->devpos)
*params->devpos = stream->written_frames;
if(params->qpcpos){ /* fixme: qpc of recording time */
LARGE_INTEGER stamp, freq;
NtQueryPerformanceCounter(&stamp, &freq);
*params->qpcpos = (stamp.QuadPart * (INT64)10000000) / freq.QuadPart;
}
return alsa_unlock_result(stream, &params->result, *frames ? S_OK : AUDCLNT_S_BUFFER_EMPTY);
}
static NTSTATUS alsa_release_capture_buffer(void *args)
{
struct release_capture_buffer_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
UINT32 done = params->done;
alsa_lock(stream);
if(!done){
stream->getbuf_last = 0;
return alsa_unlock_result(stream, &params->result, S_OK);
}
if(!stream->getbuf_last)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_OUT_OF_ORDER);
if(stream->getbuf_last != done)
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_INVALID_SIZE);
stream->written_frames += done;
stream->held_frames -= done;
stream->lcl_offs_frames += done;
stream->lcl_offs_frames %= stream->bufsize_frames;
stream->getbuf_last = 0;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_is_format_supported(void *args)
{
struct is_format_supported_params *params = args;
const WAVEFORMATEXTENSIBLE *fmtex = (const WAVEFORMATEXTENSIBLE *)params->fmt_in;
snd_pcm_t *pcm_handle;
snd_pcm_hw_params_t *hw_params;
snd_pcm_format_mask_t *formats = NULL;
snd_pcm_format_t format;
WAVEFORMATEXTENSIBLE *closest = NULL;
unsigned int max = 0, min = 0;
int err;
int alsa_channels, alsa_channel_map[32];
params->result = S_OK;
if(!params->fmt_in || (params->share == AUDCLNT_SHAREMODE_SHARED && !params->fmt_out))
params->result = E_POINTER;
else if(params->share != AUDCLNT_SHAREMODE_SHARED && params->share != AUDCLNT_SHAREMODE_EXCLUSIVE)
params->result = E_INVALIDARG;
else if(params->fmt_in->wFormatTag == WAVE_FORMAT_EXTENSIBLE){
if(params->fmt_in->cbSize < sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX))
params->result = E_INVALIDARG;
else if(params->fmt_in->nAvgBytesPerSec == 0 || params->fmt_in->nBlockAlign == 0 ||
(fmtex->Samples.wValidBitsPerSample > params->fmt_in->wBitsPerSample))
params->result = E_INVALIDARG;
}
if(FAILED(params->result))
return STATUS_SUCCESS;
if(params->fmt_in->nChannels == 0){
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
return STATUS_SUCCESS;
}
params->result = alsa_open_device(params->device, params->flow, &pcm_handle, &hw_params);
if(FAILED(params->result))
return STATUS_SUCCESS;
if((err = snd_pcm_hw_params_any(pcm_handle, hw_params)) < 0){
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
goto exit;
}
formats = calloc(1, snd_pcm_format_mask_sizeof());
if(!formats){
params->result = E_OUTOFMEMORY;
goto exit;
}
snd_pcm_hw_params_get_format_mask(hw_params, formats);
format = alsa_format(params->fmt_in);
if (format == SND_PCM_FORMAT_UNKNOWN ||
!snd_pcm_format_mask_test(formats, format)){
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
goto exit;
}
closest = clone_format(params->fmt_in);
if(!closest){
params->result = E_OUTOFMEMORY;
goto exit;
}
if((err = snd_pcm_hw_params_get_rate_min(hw_params, &min, NULL)) < 0){
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
WARN("Unable to get min rate: %d (%s)\n", err, snd_strerror(err));
goto exit;
}
if((err = snd_pcm_hw_params_get_rate_max(hw_params, &max, NULL)) < 0){
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
WARN("Unable to get max rate: %d (%s)\n", err, snd_strerror(err));
goto exit;
}
if(params->fmt_in->nSamplesPerSec < min || params->fmt_in->nSamplesPerSec > max){
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
goto exit;
}
if((err = snd_pcm_hw_params_get_channels_min(hw_params, &min)) < 0){
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
WARN("Unable to get min channels: %d (%s)\n", err, snd_strerror(err));
goto exit;
}
if((err = snd_pcm_hw_params_get_channels_max(hw_params, &max)) < 0){
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
WARN("Unable to get max channels: %d (%s)\n", err, snd_strerror(err));
goto exit;
}
if(params->fmt_in->nChannels > max){
params->result = S_FALSE;
closest->Format.nChannels = max;
}else if(params->fmt_in->nChannels < min){
params->result = S_FALSE;
closest->Format.nChannels = min;
}
map_channels(params->flow, params->fmt_in, &alsa_channels, alsa_channel_map);
if(alsa_channels > max){
params->result = S_FALSE;
closest->Format.nChannels = max;
}
if(closest->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE)
closest->dwChannelMask = get_channel_mask(closest->Format.nChannels);
if(params->fmt_in->nBlockAlign != params->fmt_in->nChannels * params->fmt_in->wBitsPerSample / 8 ||
params->fmt_in->nAvgBytesPerSec != params->fmt_in->nBlockAlign * params->fmt_in->nSamplesPerSec ||
(params->fmt_in->wFormatTag == WAVE_FORMAT_EXTENSIBLE &&
fmtex->Samples.wValidBitsPerSample < params->fmt_in->wBitsPerSample))
params->result = S_FALSE;
if(params->share == AUDCLNT_SHAREMODE_EXCLUSIVE && params->fmt_in->wFormatTag == WAVE_FORMAT_EXTENSIBLE){
if(fmtex->dwChannelMask == 0 || fmtex->dwChannelMask & SPEAKER_RESERVED)
params->result = S_FALSE;
}
exit:
if(params->result == S_FALSE && !params->fmt_out)
params->result = AUDCLNT_E_UNSUPPORTED_FORMAT;
if(params->result == S_FALSE && params->fmt_out) {
closest->Format.nBlockAlign = closest->Format.nChannels * closest->Format.wBitsPerSample / 8;
closest->Format.nAvgBytesPerSec = closest->Format.nBlockAlign * closest->Format.nSamplesPerSec;
if(closest->Format.wFormatTag == WAVE_FORMAT_EXTENSIBLE)
closest->Samples.wValidBitsPerSample = closest->Format.wBitsPerSample;
memcpy(params->fmt_out, closest, closest->Format.cbSize);
}
free(closest);
free(formats);
free(hw_params);
snd_pcm_close(pcm_handle);
return STATUS_SUCCESS;
}
static NTSTATUS alsa_get_mix_format(void *args)
{
struct get_mix_format_params *params = args;
WAVEFORMATEXTENSIBLE *fmt = params->fmt;
snd_pcm_t *pcm_handle;
snd_pcm_hw_params_t *hw_params;
snd_pcm_format_mask_t *formats;
unsigned int max_rate, max_channels;
int err;
params->result = alsa_open_device(params->device, params->flow, &pcm_handle, &hw_params);
if(FAILED(params->result))
return STATUS_SUCCESS;
formats = calloc(1, snd_pcm_format_mask_sizeof());
if(!formats){
free(hw_params);
snd_pcm_close(pcm_handle);
params->result = E_OUTOFMEMORY;
return STATUS_SUCCESS;
}
if((err = snd_pcm_hw_params_any(pcm_handle, hw_params)) < 0){
WARN("Unable to get hw_params: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
goto exit;
}
snd_pcm_hw_params_get_format_mask(hw_params, formats);
fmt->Format.wFormatTag = WAVE_FORMAT_EXTENSIBLE;
if(snd_pcm_format_mask_test(formats, SND_PCM_FORMAT_FLOAT_LE)){
fmt->Format.wBitsPerSample = 32;
fmt->SubFormat = KSDATAFORMAT_SUBTYPE_IEEE_FLOAT;
}else if(snd_pcm_format_mask_test(formats, SND_PCM_FORMAT_S16_LE)){
fmt->Format.wBitsPerSample = 16;
fmt->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
}else if(snd_pcm_format_mask_test(formats, SND_PCM_FORMAT_U8)){
fmt->Format.wBitsPerSample = 8;
fmt->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
}else if(snd_pcm_format_mask_test(formats, SND_PCM_FORMAT_S32_LE)){
fmt->Format.wBitsPerSample = 32;
fmt->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
}else if(snd_pcm_format_mask_test(formats, SND_PCM_FORMAT_S24_3LE)){
fmt->Format.wBitsPerSample = 24;
fmt->SubFormat = KSDATAFORMAT_SUBTYPE_PCM;
}else{
ERR("Didn't recognize any available ALSA formats\n");
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
goto exit;
}
if((err = snd_pcm_hw_params_get_channels_max(hw_params, &max_channels)) < 0){
WARN("Unable to get max channels: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
goto exit;
}
if(max_channels > 6)
fmt->Format.nChannels = 2;
else
fmt->Format.nChannels = max_channels;
if(fmt->Format.nChannels > 1 && (fmt->Format.nChannels & 0x1)){
/* For most hardware on Windows, users must choose a configuration with an even
* number of channels (stereo, quad, 5.1, 7.1). Users can then disable
* channels, but those channels are still reported to applications from
* GetMixFormat! Some applications behave badly if given an odd number of
* channels (e.g. 2.1). */
if(fmt->Format.nChannels < max_channels)
fmt->Format.nChannels += 1;
else
/* We could "fake" more channels and downmix the emulated channels,
* but at that point you really ought to tweak your ALSA setup or
* just use PulseAudio. */
WARN("Some Windows applications behave badly with an odd number of channels (%u)!\n", fmt->Format.nChannels);
}
fmt->dwChannelMask = get_channel_mask(fmt->Format.nChannels);
if((err = snd_pcm_hw_params_get_rate_max(hw_params, &max_rate, NULL)) < 0){
WARN("Unable to get max rate: %d (%s)\n", err, snd_strerror(err));
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
goto exit;
}
if(max_rate >= 48000)
fmt->Format.nSamplesPerSec = 48000;
else if(max_rate >= 44100)
fmt->Format.nSamplesPerSec = 44100;
else if(max_rate >= 22050)
fmt->Format.nSamplesPerSec = 22050;
else if(max_rate >= 11025)
fmt->Format.nSamplesPerSec = 11025;
else if(max_rate >= 8000)
fmt->Format.nSamplesPerSec = 8000;
else{
ERR("Unknown max rate: %u\n", max_rate);
params->result = AUDCLNT_E_DEVICE_INVALIDATED;
goto exit;
}
fmt->Format.nBlockAlign = (fmt->Format.wBitsPerSample * fmt->Format.nChannels) / 8;
fmt->Format.nAvgBytesPerSec = fmt->Format.nSamplesPerSec * fmt->Format.nBlockAlign;
fmt->Samples.wValidBitsPerSample = fmt->Format.wBitsPerSample;
fmt->Format.cbSize = sizeof(WAVEFORMATEXTENSIBLE) - sizeof(WAVEFORMATEX);
exit:
free(formats);
free(hw_params);
snd_pcm_close(pcm_handle);
return STATUS_SUCCESS;
}
static NTSTATUS alsa_get_device_period(void *args)
{
struct get_device_period_params *params = args;
if (params->def_period)
*params->def_period = def_period;
if (params->min_period)
*params->min_period = def_period;
params->result = S_OK;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_get_buffer_size(void *args)
{
struct get_buffer_size_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
*params->frames = stream->bufsize_frames;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_get_latency(void *args)
{
struct get_latency_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
/* Hide some frames in the ALSA buffer. Allows us to return GetCurrentPadding=0
* yet have enough data left to play (as if it were in native's mixer). Add:
* + mmdevapi_period such that at the end of it, ALSA still has data;
* + EXTRA_SAFE (~4ms) to allow for late callback invocation / fluctuation;
* + alsa_period such that ALSA always has at least one period to play. */
if(stream->flow == eRender)
*params->latency = muldiv(stream->hidden_frames, 10000000, stream->fmt->nSamplesPerSec);
else
*params->latency = muldiv(stream->alsa_period_frames, 10000000, stream->fmt->nSamplesPerSec)
+ stream->mmdev_period_rt;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_get_current_padding(void *args)
{
struct get_current_padding_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
/* padding is solely updated at callback time in shared mode */
*params->padding = stream->held_frames;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_get_next_packet_size(void *args)
{
struct get_next_packet_size_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
*params->frames = stream->held_frames < stream->mmdev_period_frames ? 0 : stream->mmdev_period_frames;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_get_frequency(void *args)
{
struct get_frequency_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
UINT64 *freq = params->freq;
alsa_lock(stream);
if(stream->share == AUDCLNT_SHAREMODE_SHARED)
*freq = (UINT64)stream->fmt->nSamplesPerSec * stream->fmt->nBlockAlign;
else
*freq = stream->fmt->nSamplesPerSec;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_get_position(void *args)
{
struct get_position_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
UINT64 position;
snd_pcm_state_t alsa_state;
if (params->device) {
FIXME("Device position reporting not implemented\n");
params->result = E_NOTIMPL;
return STATUS_SUCCESS;
}
alsa_lock(stream);
/* avail_update required to get accurate snd_pcm_state() */
snd_pcm_avail_update(stream->pcm_handle);
alsa_state = snd_pcm_state(stream->pcm_handle);
if(stream->flow == eRender){
position = stream->written_frames - stream->held_frames;
if(stream->started && alsa_state == SND_PCM_STATE_RUNNING && stream->held_frames)
/* we should be using snd_pcm_delay here, but it is broken
* especially during ALSA device underrun. instead, let's just
* interpolate between periods with the system timer. */
position += interp_elapsed_frames(stream);
position = min(position, stream->written_frames - stream->held_frames + stream->mmdev_period_frames);
position = min(position, stream->written_frames);
}else
position = stream->written_frames + stream->held_frames;
/* ensure monotic growth */
if(position < stream->last_pos_frames)
position = stream->last_pos_frames;
else
stream->last_pos_frames = position;
TRACE("frames written: %u, held: %u, state: 0x%x, position: %u\n",
(UINT32)(stream->written_frames%1000000000), stream->held_frames,
alsa_state, (UINT32)(position%1000000000));
if(stream->share == AUDCLNT_SHAREMODE_SHARED)
*params->pos = position * stream->fmt->nBlockAlign;
else
*params->pos = position;
if(params->qpctime){
LARGE_INTEGER stamp, freq;
NtQueryPerformanceCounter(&stamp, &freq);
*params->qpctime = (stamp.QuadPart * (INT64)10000000) / freq.QuadPart;
}
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_set_volumes(void *args)
{
struct set_volumes_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
unsigned int i;
for(i = 0; i < stream->fmt->nChannels; i++)
stream->vols[i] = params->volumes[i] * params->session_volumes[i] * params->master_volume;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_set_event_handle(void *args)
{
struct set_event_handle_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
if(!(stream->flags & AUDCLNT_STREAMFLAGS_EVENTCALLBACK))
return alsa_unlock_result(stream, &params->result, AUDCLNT_E_EVENTHANDLE_NOT_EXPECTED);
if (stream->event){
FIXME("called twice\n");
return alsa_unlock_result(stream, &params->result, HRESULT_FROM_WIN32(ERROR_INVALID_NAME));
}
stream->event = params->event;
return alsa_unlock_result(stream, &params->result, S_OK);
}
static NTSTATUS alsa_is_started(void *args)
{
struct is_started_params *params = args;
struct alsa_stream *stream = handle_get_stream(params->stream);
alsa_lock(stream);
return alsa_unlock_result(stream, &params->result, stream->started ? S_OK : S_FALSE);
}
static unsigned int alsa_probe_num_speakers(char *name)
{
snd_pcm_t *handle;
snd_pcm_hw_params_t *params;
int err;
unsigned int max_channels = 0;
if ((err = snd_pcm_open(&handle, name, SND_PCM_STREAM_PLAYBACK, SND_PCM_NONBLOCK)) < 0) {
WARN("The device \"%s\" failed to open: %d (%s).\n",
name, err, snd_strerror(err));
return 0;
}
params = malloc(snd_pcm_hw_params_sizeof());
if (!params) {
WARN("Out of memory.\n");
snd_pcm_close(handle);
return 0;
}
if ((err = snd_pcm_hw_params_any(handle, params)) < 0) {
WARN("snd_pcm_hw_params_any failed for \"%s\": %d (%s).\n",
name, err, snd_strerror(err));
goto exit;
}
if ((err = snd_pcm_hw_params_get_channels_max(params,
&max_channels)) < 0){
WARN("Unable to get max channels: %d (%s)\n", err, snd_strerror(err));
goto exit;
}
exit:
free(params);
snd_pcm_close(handle);
return max_channels;
}
enum AudioDeviceConnectionType {
AudioDeviceConnectionType_Unknown = 0,
AudioDeviceConnectionType_PCI,
AudioDeviceConnectionType_USB
};
static NTSTATUS alsa_get_prop_value(void *args)
{
struct get_prop_value_params *params = args;
const char *name = params->device;
EDataFlow flow = params->flow;
const GUID *guid = params->guid;
const PROPERTYKEY *prop = params->prop;
PROPVARIANT *out = params->value;
static const PROPERTYKEY devicepath_key = { /* undocumented? - {b3f8fa53-0004-438e-9003-51a46e139bfc},2 */
{0xb3f8fa53, 0x0004, 0x438e, {0x90, 0x03, 0x51, 0xa4, 0x6e, 0x13, 0x9b, 0xfc}}, 2
};
if(IsEqualPropertyKey(*prop, devicepath_key))
{
enum AudioDeviceConnectionType connection = AudioDeviceConnectionType_Unknown;
USHORT vendor_id = 0, product_id = 0;
char uevent[MAX_PATH];
FILE *fuevent = NULL;
int card, device;
UINT serial_number;
char buf[128];
int len;
if(sscanf(name, "plughw:%u,%u", &card, &device)){
sprintf(uevent, "/sys/class/sound/card%u/device/uevent", card);
fuevent = fopen(uevent, "r");
}
if(fuevent){
char line[256];
while (fgets(line, sizeof(line), fuevent)) {
char *val;
size_t val_len;
if((val = strchr(line, '='))) {
val[0] = 0;
val++;
val_len = strlen(val);
if(val_len > 0 && val[val_len - 1] == '\n') { val[val_len - 1] = 0; }
if(!strcmp(line, "PCI_ID")){
connection = AudioDeviceConnectionType_PCI;
if(sscanf(val, "%hX:%hX", &vendor_id, &product_id)<2){
WARN("Unexpected input when reading PCI_ID in uevent file.\n");
connection = AudioDeviceConnectionType_Unknown;
break;
}
}else if(!strcmp(line, "DEVTYPE") && !strcmp(val,"usb_interface"))
connection = AudioDeviceConnectionType_USB;
else if(!strcmp(line, "PRODUCT"))
if(sscanf(val, "%hx/%hx/", &vendor_id, &product_id)<2){
WARN("Unexpected input when reading PRODUCT in uevent file.\n");
connection = AudioDeviceConnectionType_Unknown;
break;
}
}
}
fclose(fuevent);
}
/* As hardly any audio devices have serial numbers, Windows instead
appears to use a persistent random number. We emulate this here
by instead using the last 8 hex digits of the GUID. */
serial_number = (guid->Data4[4] << 24) | (guid->Data4[5] << 16) | (guid->Data4[6] << 8) | guid->Data4[7];
if(connection == AudioDeviceConnectionType_USB)
sprintf(buf, "{1}.USB\\VID_%04X&PID_%04X\\%u&%08X",
vendor_id, product_id, device, serial_number);
else if (connection == AudioDeviceConnectionType_PCI)
sprintf(buf, "{1}.HDAUDIO\\FUNC_01&VEN_%04X&DEV_%04X\\%u&%08X",
vendor_id, product_id, device, serial_number);
else
sprintf(buf, "{1}.ROOT\\MEDIA\\%04u", serial_number & 0x1FF);
len = strlen(buf) + 1;
if(*params->buffer_size < len * sizeof(WCHAR)){
params->result = E_NOT_SUFFICIENT_BUFFER;
*params->buffer_size = len * sizeof(WCHAR);
return STATUS_SUCCESS;
}
out->vt = VT_LPWSTR;
out->pwszVal = params->buffer;
ntdll_umbstowcs(buf, len, out->pwszVal, len);
params->result = S_OK;
return STATUS_SUCCESS;
} else if (flow != eCapture && IsEqualPropertyKey(*prop, PKEY_AudioEndpoint_PhysicalSpeakers)) {
unsigned int num_speakers, card, device;
char hwname[255];
if (sscanf(name, "plughw:%u,%u", &card, &device))
sprintf(hwname, "hw:%u,%u", card, device); /* must be hw rather than plughw to work */
else
strcpy(hwname, name);
num_speakers = alsa_probe_num_speakers(hwname);
if (num_speakers == 0){
params->result = E_FAIL;
return STATUS_SUCCESS;
}
out->vt = VT_UI4;
if (num_speakers > 6)
out->ulVal = KSAUDIO_SPEAKER_STEREO;
else if (num_speakers == 6)
out->ulVal = KSAUDIO_SPEAKER_5POINT1;
else if (num_speakers >= 4)
out->ulVal = KSAUDIO_SPEAKER_QUAD;
else if (num_speakers >= 2)
out->ulVal = KSAUDIO_SPEAKER_STEREO;
else if (num_speakers == 1)
out->ulVal = KSAUDIO_SPEAKER_MONO;
params->result = S_OK;
return STATUS_SUCCESS;
}
TRACE("Unimplemented property %s,%u\n", wine_dbgstr_guid(&prop->fmtid), (unsigned)prop->pid);
params->result = E_NOTIMPL;
return STATUS_SUCCESS;
}
unixlib_entry_t __wine_unix_call_funcs[] =
{
alsa_process_attach,
alsa_not_implemented,
alsa_main_loop,
alsa_get_endpoint_ids,
alsa_create_stream,
alsa_release_stream,
alsa_start,
alsa_stop,
alsa_reset,
alsa_timer_loop,
alsa_get_render_buffer,
alsa_release_render_buffer,
alsa_get_capture_buffer,
alsa_release_capture_buffer,
alsa_is_format_supported,
alsa_get_mix_format,
alsa_get_device_period,
alsa_get_buffer_size,
alsa_get_latency,
alsa_get_current_padding,
alsa_get_next_packet_size,
alsa_get_frequency,
alsa_get_position,
alsa_set_volumes,
alsa_set_event_handle,
alsa_not_implemented,
alsa_is_started,
alsa_get_prop_value,
alsa_not_implemented,
alsa_midi_release,
alsa_midi_out_message,
alsa_midi_in_message,
alsa_midi_notify_wait,
alsa_not_implemented,
};
#ifdef _WIN64
typedef UINT PTR32;
static NTSTATUS alsa_wow64_main_loop(void *args)
{
struct
{
PTR32 event;
} *params32 = args;
struct main_loop_params params =
{
.event = ULongToHandle(params32->event)
};
return alsa_main_loop(&params);
}
static NTSTATUS alsa_wow64_get_endpoint_ids(void *args)
{
struct
{
EDataFlow flow;
PTR32 endpoints;
unsigned int size;
HRESULT result;
unsigned int num;
unsigned int default_idx;
} *params32 = args;
struct get_endpoint_ids_params params =
{
.flow = params32->flow,
.endpoints = ULongToPtr(params32->endpoints),
.size = params32->size
};
alsa_get_endpoint_ids(&params);
params32->size = params.size;
params32->result = params.result;
params32->num = params.num;
params32->default_idx = params.default_idx;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_create_stream(void *args)
{
struct
{
PTR32 name;
PTR32 device;
EDataFlow flow;
AUDCLNT_SHAREMODE share;
DWORD flags;
REFERENCE_TIME duration;
REFERENCE_TIME period;
PTR32 fmt;
HRESULT result;
PTR32 channel_count;
PTR32 stream;
} *params32 = args;
struct create_stream_params params =
{
.name = ULongToPtr(params32->name),
.device = ULongToPtr(params32->device),
.flow = params32->flow,
.share = params32->share,
.flags = params32->flags,
.duration = params32->duration,
.period = params32->period,
.fmt = ULongToPtr(params32->fmt),
.channel_count = ULongToPtr(params32->channel_count),
.stream = ULongToPtr(params32->stream)
};
alsa_create_stream(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_release_stream(void *args)
{
struct
{
stream_handle stream;
PTR32 timer_thread;
HRESULT result;
} *params32 = args;
struct release_stream_params params =
{
.stream = params32->stream,
.timer_thread = ULongToHandle(params32->timer_thread)
};
alsa_release_stream(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_render_buffer(void *args)
{
struct
{
stream_handle stream;
UINT32 frames;
HRESULT result;
PTR32 data;
} *params32 = args;
BYTE *data = NULL;
struct get_render_buffer_params params =
{
.stream = params32->stream,
.frames = params32->frames,
.data = &data
};
alsa_get_render_buffer(&params);
params32->result = params.result;
*(unsigned int *)ULongToPtr(params32->data) = PtrToUlong(data);
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_capture_buffer(void *args)
{
struct
{
stream_handle stream;
HRESULT result;
PTR32 data;
PTR32 frames;
PTR32 flags;
PTR32 devpos;
PTR32 qpcpos;
} *params32 = args;
BYTE *data = NULL;
struct get_capture_buffer_params params =
{
.stream = params32->stream,
.data = &data,
.frames = ULongToPtr(params32->frames),
.flags = ULongToPtr(params32->flags),
.devpos = ULongToPtr(params32->devpos),
.qpcpos = ULongToPtr(params32->qpcpos)
};
alsa_get_capture_buffer(&params);
params32->result = params.result;
*(unsigned int *)ULongToPtr(params32->data) = PtrToUlong(data);
return STATUS_SUCCESS;
};
static NTSTATUS alsa_wow64_is_format_supported(void *args)
{
struct
{
PTR32 device;
EDataFlow flow;
AUDCLNT_SHAREMODE share;
PTR32 fmt_in;
PTR32 fmt_out;
HRESULT result;
} *params32 = args;
struct is_format_supported_params params =
{
.device = ULongToPtr(params32->device),
.flow = params32->flow,
.share = params32->share,
.fmt_in = ULongToPtr(params32->fmt_in),
.fmt_out = ULongToPtr(params32->fmt_out)
};
alsa_is_format_supported(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_mix_format(void *args)
{
struct
{
PTR32 device;
EDataFlow flow;
PTR32 fmt;
HRESULT result;
} *params32 = args;
struct get_mix_format_params params =
{
.device = ULongToPtr(params32->device),
.flow = params32->flow,
.fmt = ULongToPtr(params32->fmt)
};
alsa_get_mix_format(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_device_period(void *args)
{
struct
{
PTR32 device;
EDataFlow flow;
HRESULT result;
PTR32 def_period;
PTR32 min_period;
} *params32 = args;
struct get_device_period_params params =
{
.device = ULongToPtr(params32->device),
.flow = params32->flow,
.def_period = ULongToPtr(params32->def_period),
.min_period = ULongToPtr(params32->min_period),
};
alsa_get_device_period(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_buffer_size(void *args)
{
struct
{
stream_handle stream;
HRESULT result;
PTR32 frames;
} *params32 = args;
struct get_buffer_size_params params =
{
.stream = params32->stream,
.frames = ULongToPtr(params32->frames)
};
alsa_get_buffer_size(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_latency(void *args)
{
struct
{
stream_handle stream;
HRESULT result;
PTR32 latency;
} *params32 = args;
struct get_latency_params params =
{
.stream = params32->stream,
.latency = ULongToPtr(params32->latency)
};
alsa_get_latency(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_current_padding(void *args)
{
struct
{
stream_handle stream;
HRESULT result;
PTR32 padding;
} *params32 = args;
struct get_current_padding_params params =
{
.stream = params32->stream,
.padding = ULongToPtr(params32->padding)
};
alsa_get_current_padding(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_next_packet_size(void *args)
{
struct
{
stream_handle stream;
HRESULT result;
PTR32 frames;
} *params32 = args;
struct get_next_packet_size_params params =
{
.stream = params32->stream,
.frames = ULongToPtr(params32->frames)
};
alsa_get_next_packet_size(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_frequency(void *args)
{
struct
{
stream_handle stream;
HRESULT result;
PTR32 freq;
} *params32 = args;
struct get_frequency_params params =
{
.stream = params32->stream,
.freq = ULongToPtr(params32->freq)
};
alsa_get_frequency(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_position(void *args)
{
struct
{
stream_handle stream;
BOOL device;
HRESULT result;
PTR32 pos;
PTR32 qpctime;
} *params32 = args;
struct get_position_params params =
{
.stream = params32->stream,
.device = params32->device,
.pos = ULongToPtr(params32->pos),
.qpctime = ULongToPtr(params32->qpctime)
};
alsa_get_position(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_set_volumes(void *args)
{
struct
{
stream_handle stream;
float master_volume;
PTR32 volumes;
PTR32 session_volumes;
} *params32 = args;
struct set_volumes_params params =
{
.stream = params32->stream,
.master_volume = params32->master_volume,
.volumes = ULongToPtr(params32->volumes),
.session_volumes = ULongToPtr(params32->session_volumes),
};
return alsa_set_volumes(&params);
}
static NTSTATUS alsa_wow64_set_event_handle(void *args)
{
struct
{
stream_handle stream;
PTR32 event;
HRESULT result;
} *params32 = args;
struct set_event_handle_params params =
{
.stream = params32->stream,
.event = ULongToHandle(params32->event)
};
alsa_set_event_handle(&params);
params32->result = params.result;
return STATUS_SUCCESS;
}
static NTSTATUS alsa_wow64_get_prop_value(void *args)
{
struct propvariant32
{
WORD vt;
WORD pad1, pad2, pad3;
union
{
ULONG ulVal;
PTR32 ptr;
ULARGE_INTEGER uhVal;
};
} *value32;
struct
{
PTR32 device;
EDataFlow flow;
PTR32 guid;
PTR32 prop;
HRESULT result;
PTR32 value;
PTR32 buffer; /* caller allocated buffer to hold value's strings */
PTR32 buffer_size;
} *params32 = args;
PROPVARIANT value;
struct get_prop_value_params params =
{
.device = ULongToPtr(params32->device),
.flow = params32->flow,
.guid = ULongToPtr(params32->guid),
.prop = ULongToPtr(params32->prop),
.value = &value,
.buffer = ULongToPtr(params32->buffer),
.buffer_size = ULongToPtr(params32->buffer_size)
};
alsa_get_prop_value(&params);
params32->result = params.result;
if (SUCCEEDED(params.result))
{
value32 = UlongToPtr(params32->value);
value32->vt = value.vt;
switch (value.vt)
{
case VT_UI4:
value32->ulVal = value.ulVal;
break;
case VT_LPWSTR:
value32->ptr = params32->buffer;
break;
default:
FIXME("Unhandled vt %04x\n", value.vt);
}
}
return STATUS_SUCCESS;
}
unixlib_entry_t __wine_unix_call_wow64_funcs[] =
{
alsa_process_attach,
alsa_not_implemented,
alsa_wow64_main_loop,
alsa_wow64_get_endpoint_ids,
alsa_wow64_create_stream,
alsa_wow64_release_stream,
alsa_start,
alsa_stop,
alsa_reset,
alsa_timer_loop,
alsa_wow64_get_render_buffer,
alsa_release_render_buffer,
alsa_wow64_get_capture_buffer,
alsa_release_capture_buffer,
alsa_wow64_is_format_supported,
alsa_wow64_get_mix_format,
alsa_wow64_get_device_period,
alsa_wow64_get_buffer_size,
alsa_wow64_get_latency,
alsa_wow64_get_current_padding,
alsa_wow64_get_next_packet_size,
alsa_wow64_get_frequency,
alsa_wow64_get_position,
alsa_wow64_set_volumes,
alsa_wow64_set_event_handle,
alsa_not_implemented,
alsa_is_started,
alsa_wow64_get_prop_value,
alsa_not_implemented,
alsa_midi_release,
alsa_wow64_midi_out_message,
alsa_wow64_midi_in_message,
alsa_wow64_midi_notify_wait,
alsa_not_implemented,
};
#endif /* _WIN64 */
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