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Sweden-Number/dlls/winealsa.drv/dsoutput.c

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/*
* Sample Wine Driver for Advanced Linux Sound System (ALSA)
* Based on version <final> of the ALSA API
*
* 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
*/
/*======================================================================*
* Low level dsound output implementation *
*======================================================================*/
#include "config.h"
#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 "mmddk.h"
#include "alsa.h"
#include "wine/library.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#ifdef HAVE_ALSA
WINE_DEFAULT_DEBUG_CHANNEL(wave);
WINE_DECLARE_DEBUG_CHANNEL(waveloop);
typedef struct IDsDriverImpl IDsDriverImpl;
typedef struct IDsDriverBufferImpl IDsDriverBufferImpl;
struct IDsDriverImpl
{
/* IUnknown fields */
const IDsDriverVtbl *lpVtbl;
LONG ref;
/* IDsDriverImpl fields */
UINT wDevID;
IDsDriverBufferImpl*primary;
};
struct IDsDriverBufferImpl
{
/* IUnknown fields */
const IDsDriverBufferVtbl *lpVtbl;
LONG ref;
/* IDsDriverBufferImpl fields */
IDsDriverImpl* drv;
LPVOID mmap_buffer;
DWORD mmap_buflen_bytes;
snd_pcm_uframes_t mmap_buflen_frames;
snd_pcm_channel_area_t * mmap_areas;
snd_pcm_uframes_t mmap_ppos; /* play position */
snd_pcm_uframes_t mmap_wpos; /* write position */
HANDLE mmap_thread;
ALSA_MSG_RING mmap_ring; /* sync object */
};
static void DSDB_CheckXRUN(IDsDriverBufferImpl* pdbi)
{
WINE_WAVEDEV * wwo = &(WOutDev[pdbi->drv->wDevID]);
snd_pcm_state_t state = snd_pcm_state(wwo->pcm);
snd_pcm_avail_update(wwo->pcm);
if ( state == SND_PCM_STATE_XRUN )
{
int err = snd_pcm_prepare(wwo->pcm);
WARN_(waveloop)("xrun occurred\n");
if ( err < 0 )
ERR("recovery from xrun failed, prepare failed: %s\n", snd_strerror(err));
}
else if ( state == SND_PCM_STATE_SUSPENDED )
{
int err = snd_pcm_resume(wwo->pcm);
TRACE_(waveloop)("recovery from suspension occurred\n");
if (err < 0 && err != -EAGAIN){
err = snd_pcm_prepare(wwo->pcm);
if (err < 0)
ERR("recovery from suspend failed, prepare failed: %s\n", snd_strerror(err));
}
} else if ( state != SND_PCM_STATE_RUNNING ) {
WARN_(waveloop)("Unhandled state: %d\n", state);
}
}
/**
* The helper thread for DirectSound
*
* Basically it does an infinite loop until it is told to die
*
* snd_pcm_wait() is a call that polls the sound buffer and waits
* until there is at least 1 period free before it returns.
*
* We then commit the buffer filled by the owner of this
* IDSDriverBuffer */
static DWORD CALLBACK DBSB_MMAPLoop(LPVOID data)
{
IDsDriverBufferImpl* pdbi = (IDsDriverBufferImpl*)data;
WINE_WAVEDEV *wwo = &(WOutDev[pdbi->drv->wDevID]);
snd_pcm_uframes_t frames, wanted, ofs;
const snd_pcm_channel_area_t *areas;
int state = WINE_WS_STOPPED;
snd_pcm_state_t alsastate;
TRACE_(waveloop)("0x%8p\n", data);
TRACE("0x%8p, framelength: %lu, area: %8p\n", data, pdbi->mmap_buflen_frames, pdbi->mmap_areas);
if (areas != pdbi->mmap_areas || areas->addr != pdbi->mmap_areas->addr)
FIXME("Can't access sound driver's buffer directly.\n");
do {
enum win_wm_message msg;
DWORD param;
HANDLE hEvent;
int err;
snd_pcm_format_t format;
if (state != WINE_WS_PLAYING)
{
ALSA_WaitRingMessage(&pdbi->mmap_ring, 1000000);
ALSA_RetrieveRingMessage(&pdbi->mmap_ring, &msg, &param, &hEvent);
}
else
while (!ALSA_RetrieveRingMessage(&pdbi->mmap_ring, &msg, &param, &hEvent))
{
snd_pcm_wait(wwo->pcm, -1);
DSDB_CheckXRUN(pdbi);
wanted = frames = pdbi->mmap_buflen_frames;
err = snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
/* mark our current play position */
pdbi->mmap_ppos = ofs;
TRACE_(waveloop)("Updated position to %lx [%d, 0x%8p, %lu]\n", ofs, err, areas, frames);
/* Check to make sure we committed all we want to commit. ALSA
* only gives a contiguous linear region, so we need to check this
* in case we've reached the end of the buffer, in which case we
* can wrap around back to the beginning. */
if (frames < wanted) {
frames = wanted - frames;
snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
}
wanted = 0;
snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &wanted);
snd_pcm_mmap_commit(wwo->pcm, ofs, wanted);
pdbi->mmap_wpos = ofs;
}
switch (msg) {
case WINE_WM_STARTING:
if (state == WINE_WS_PLAYING)
break;
alsastate = snd_pcm_state(wwo->pcm);
if ( alsastate == SND_PCM_STATE_SETUP )
{
err = snd_pcm_prepare(wwo->pcm);
alsastate = snd_pcm_state(wwo->pcm);
}
snd_pcm_avail_update(wwo->pcm);
/* Rewind, and initialise */
frames = 0;
snd_pcm_mmap_begin(wwo->pcm, &areas, &ofs, &frames);
snd_pcm_mmap_commit(wwo->pcm, ofs, frames);
snd_pcm_rewind(wwo->pcm, ofs);
snd_pcm_hw_params_get_format(wwo->hw_params, &format);
snd_pcm_format_set_silence(format, pdbi->mmap_buffer, pdbi->mmap_buflen_frames);
pdbi->mmap_ppos = 0;
snd_pcm_hw_params_get_period_size(wwo->hw_params, &wanted, NULL);
pdbi->mmap_wpos = 2*wanted;
if ( alsastate == SND_PCM_STATE_PREPARED )
{
err = snd_pcm_start(wwo->pcm);
TRACE("Starting 0x%8p err: %d\n", wwo->pcm, err);
}
state = WINE_WS_PLAYING;
break;
case WINE_WM_STOPPING:
state = WINE_WS_STOPPED;
snd_pcm_drain(wwo->pcm);
break;
case WINE_WM_CLOSING:
if (wwo->pcm != NULL)
snd_pcm_drain(wwo->pcm);
pdbi->mmap_thread = NULL;
SetEvent(hEvent);
goto out;
default:
ERR("Unhandled event %s\n", ALSA_getCmdString(msg));
break;
}
if (hEvent != INVALID_HANDLE_VALUE)
SetEvent(hEvent);
} while (1);
out:
TRACE_(waveloop)("Destroyed MMAP thread\n");
TRACE("Destroyed MMAP thread\n");
return 0;
}
/**
* Allocate the memory-mapped buffer for direct sound, and set up the
* callback.
*/
static int DSDB_CreateMMAP(IDsDriverBufferImpl* pdbi)
{
WINE_WAVEDEV * wwo = &(WOutDev[pdbi->drv->wDevID]);
snd_pcm_format_t format;
snd_pcm_uframes_t frames, ofs, avail, psize;
unsigned int channels, bits_per_sample, bits_per_frame;
int err, mmap_mode;
mmap_mode = snd_pcm_type(wwo->pcm);
ALSA_InitRingMessage(&pdbi->mmap_ring);
if (mmap_mode == SND_PCM_TYPE_HW) {
TRACE("mmap'd buffer is a hardware buffer.\n");
}
else {
#if 0 /* Horribly hack, shouldn't be used */
err = snd_pcm_hw_params_get_period_size(wwo->hw_params, &psize, NULL);
/* Set only a buffer of 2 period sizes, to decrease latency */
if (err >= 0)
err = snd_pcm_hw_params_set_buffer_size_near(wwo->pcm, wwo->hw_params, &psize);
psize *= 2;
if (err < 0) {
ERR("Errno %d (%s) occured when setting buffer size\n", err, strerror(errno));
}
#endif
TRACE("mmap'd buffer is an ALSA emulation of hardware buffer.\n");
}
err = snd_pcm_hw_params_get_period_size(wwo->hw_params, &psize, NULL);
err = snd_pcm_hw_params_get_format(wwo->hw_params, &format);
err = snd_pcm_hw_params_get_buffer_size(wwo->hw_params, &frames);
err = snd_pcm_hw_params_get_channels(wwo->hw_params, &channels);
bits_per_sample = snd_pcm_format_physical_width(format);
bits_per_frame = bits_per_sample * channels;
if (TRACE_ON(wave))
ALSA_TraceParameters(wwo->hw_params, NULL, FALSE);
TRACE("format=%s frames=%ld channels=%d bits_per_sample=%d bits_per_frame=%d\n",
snd_pcm_format_name(format), frames, channels, bits_per_sample, bits_per_frame);
pdbi->mmap_buflen_frames = frames;
pdbi->mmap_buflen_bytes = snd_pcm_frames_to_bytes( wwo->pcm, frames );
avail = snd_pcm_avail_update(wwo->pcm);
if (avail < 0)
{
ERR("No buffer is available: %s.\n", snd_strerror(avail));
return DSERR_GENERIC;
}
err = snd_pcm_mmap_begin(wwo->pcm, (const snd_pcm_channel_area_t **)&pdbi->mmap_areas, &ofs, &avail);
if ( err < 0 )
{
ERR("Can't map sound device for direct access: %s\n", snd_strerror(err));
return DSERR_GENERIC;
}
avail = 0;/* We don't have any data to commit yet */
err = snd_pcm_mmap_commit(wwo->pcm, ofs, avail);
if (ofs > 0)
err = snd_pcm_rewind(wwo->pcm, ofs);
pdbi->mmap_buffer = pdbi->mmap_areas->addr;
pdbi->mmap_thread = NULL;
TRACE("created mmap buffer of %ld frames (%d bytes) at %p\n",
frames, pdbi->mmap_buflen_bytes, pdbi->mmap_buffer);
return DS_OK;
}
static HRESULT WINAPI IDsDriverBufferImpl_QueryInterface(PIDSDRIVERBUFFER iface, REFIID riid, LPVOID *ppobj)
{
/* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
FIXME("(): stub!\n");
return DSERR_UNSUPPORTED;
}
static ULONG WINAPI IDsDriverBufferImpl_AddRef(PIDSDRIVERBUFFER iface)
{
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
ULONG refCount = InterlockedIncrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
return refCount;
}
static ULONG WINAPI IDsDriverBufferImpl_Release(PIDSDRIVERBUFFER iface)
{
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
ULONG refCount = InterlockedDecrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
if (refCount)
return refCount;
if (This->mmap_thread != NULL)
ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_CLOSING, 0, 1);
TRACE("mmap buffer %p destroyed\n", This->mmap_buffer);
ALSA_DestroyRingMessage(&This->mmap_ring);
if (This == This->drv->primary)
This->drv->primary = NULL;
HeapFree(GetProcessHeap(), 0, This);
return 0;
}
static HRESULT WINAPI IDsDriverBufferImpl_Lock(PIDSDRIVERBUFFER iface,
LPVOID*ppvAudio1,LPDWORD pdwLen1,
LPVOID*ppvAudio2,LPDWORD pdwLen2,
DWORD dwWritePosition,DWORD dwWriteLen,
DWORD dwFlags)
{
/* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
TRACE("(%p)\n",iface);
return DSERR_UNSUPPORTED;
}
static HRESULT WINAPI IDsDriverBufferImpl_Unlock(PIDSDRIVERBUFFER iface,
LPVOID pvAudio1,DWORD dwLen1,
LPVOID pvAudio2,DWORD dwLen2)
{
/* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
TRACE("(%p)\n",iface);
return DSERR_UNSUPPORTED;
}
static HRESULT WINAPI IDsDriverBufferImpl_SetFormat(PIDSDRIVERBUFFER iface,
LPWAVEFORMATEX pwfx)
{
/* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
TRACE("(%p,%p)\n",iface,pwfx);
return DSERR_BUFFERLOST;
}
static HRESULT WINAPI IDsDriverBufferImpl_SetFrequency(PIDSDRIVERBUFFER iface, DWORD dwFreq)
{
/* IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface; */
TRACE("(%p,%d): stub\n",iface,dwFreq);
return DSERR_UNSUPPORTED;
}
static HRESULT WINAPI IDsDriverBufferImpl_SetVolumePan(PIDSDRIVERBUFFER iface, PDSVOLUMEPAN pVolPan)
{
DWORD vol;
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
TRACE("(%p,%p)\n",iface,pVolPan);
vol = pVolPan->dwTotalLeftAmpFactor | (pVolPan->dwTotalRightAmpFactor << 16);
if (wodSetVolume(This->drv->wDevID, vol) != MMSYSERR_NOERROR) {
WARN("wodSetVolume failed\n");
return DSERR_INVALIDPARAM;
}
return DS_OK;
}
static HRESULT WINAPI IDsDriverBufferImpl_SetPosition(PIDSDRIVERBUFFER iface, DWORD dwNewPos)
{
/* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
FIXME("(%p,%d): stub\n",iface,dwNewPos);
return DSERR_UNSUPPORTED;
}
static HRESULT WINAPI IDsDriverBufferImpl_GetPosition(PIDSDRIVERBUFFER iface,
LPDWORD lpdwPlay, LPDWORD lpdwWrite)
{
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
WINE_WAVEDEV * wwo = &(WOutDev[This->drv->wDevID]);
snd_pcm_uframes_t hw_pptr, hw_wptr;
snd_pcm_state_t state;
if (wwo->hw_params == NULL || wwo->pcm == NULL) return DSERR_GENERIC;
#if 0 /* Shouldn't be needed */
/* we need to track down buffer underruns */
DSDB_CheckXRUN(This);
#endif
state = snd_pcm_state(wwo->pcm);
if (state == SND_PCM_STATE_RUNNING)
{
hw_pptr = This->mmap_ppos;
hw_wptr = This->mmap_wpos;
}
else
hw_pptr = hw_wptr = 0;
if (lpdwPlay)
*lpdwPlay = snd_pcm_frames_to_bytes(wwo->pcm, hw_pptr) % This->mmap_buflen_bytes;
if (lpdwWrite)
*lpdwWrite = snd_pcm_frames_to_bytes(wwo->pcm, hw_wptr) % This->mmap_buflen_bytes;
TRACE_(waveloop)("hw_pptr=0x%08x, hw_wptr=0x%08x playpos=%d, writepos=%d\n", (unsigned int)hw_pptr, (unsigned int)hw_wptr, lpdwPlay?*lpdwPlay:-1, lpdwWrite?*lpdwWrite:-1);
return DS_OK;
}
static HRESULT WINAPI IDsDriverBufferImpl_Play(PIDSDRIVERBUFFER iface, DWORD dwRes1, DWORD dwRes2, DWORD dwFlags)
{
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
TRACE("(%p,%x,%x,%x)\n",iface,dwRes1,dwRes2,dwFlags);
if (This->mmap_thread == NULL)
This->mmap_thread = CreateThread(NULL, 0, DBSB_MMAPLoop, (LPVOID)(DWORD)This, 0, NULL);
if (This->mmap_thread == NULL)
ERR("Cannot create sound thread, don't expect any sound at all\n");
else
ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_STARTING, 0, 1);
return DS_OK;
}
static HRESULT WINAPI IDsDriverBufferImpl_Stop(PIDSDRIVERBUFFER iface)
{
IDsDriverBufferImpl *This = (IDsDriverBufferImpl *)iface;
TRACE("(%p)\n",iface);
if (This->mmap_thread != NULL)
ALSA_AddRingMessage(&This->mmap_ring, WINE_WM_STOPPING, 0, 1);
return DS_OK;
}
static const IDsDriverBufferVtbl dsdbvt =
{
IDsDriverBufferImpl_QueryInterface,
IDsDriverBufferImpl_AddRef,
IDsDriverBufferImpl_Release,
IDsDriverBufferImpl_Lock,
IDsDriverBufferImpl_Unlock,
IDsDriverBufferImpl_SetFormat,
IDsDriverBufferImpl_SetFrequency,
IDsDriverBufferImpl_SetVolumePan,
IDsDriverBufferImpl_SetPosition,
IDsDriverBufferImpl_GetPosition,
IDsDriverBufferImpl_Play,
IDsDriverBufferImpl_Stop
};
static HRESULT WINAPI IDsDriverImpl_QueryInterface(PIDSDRIVER iface, REFIID riid, LPVOID *ppobj)
{
/* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
FIXME("(%p): stub!\n",iface);
return DSERR_UNSUPPORTED;
}
static ULONG WINAPI IDsDriverImpl_AddRef(PIDSDRIVER iface)
{
IDsDriverImpl *This = (IDsDriverImpl *)iface;
ULONG refCount = InterlockedIncrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount - 1);
return refCount;
}
static ULONG WINAPI IDsDriverImpl_Release(PIDSDRIVER iface)
{
IDsDriverImpl *This = (IDsDriverImpl *)iface;
ULONG refCount = InterlockedDecrement(&This->ref);
TRACE("(%p)->(ref before=%u)\n",This, refCount + 1);
if (refCount)
return refCount;
HeapFree(GetProcessHeap(),0,This);
return 0;
}
static HRESULT WINAPI IDsDriverImpl_GetDriverDesc(PIDSDRIVER iface, PDSDRIVERDESC pDesc)
{
IDsDriverImpl *This = (IDsDriverImpl *)iface;
TRACE("(%p,%p)\n",iface,pDesc);
memcpy(pDesc, &(WOutDev[This->wDevID].ds_desc), sizeof(DSDRIVERDESC));
pDesc->dwFlags = DSDDESC_DOMMSYSTEMOPEN | DSDDESC_DOMMSYSTEMSETFORMAT |
DSDDESC_USESYSTEMMEMORY | DSDDESC_DONTNEEDPRIMARYLOCK;
pDesc->dnDevNode = WOutDev[This->wDevID].waveDesc.dnDevNode;
pDesc->wVxdId = 0;
pDesc->wReserved = 0;
pDesc->ulDeviceNum = This->wDevID;
pDesc->dwHeapType = DSDHEAP_NOHEAP;
pDesc->pvDirectDrawHeap = NULL;
pDesc->dwMemStartAddress = 0;
pDesc->dwMemEndAddress = 0;
pDesc->dwMemAllocExtra = 0;
pDesc->pvReserved1 = NULL;
pDesc->pvReserved2 = NULL;
return DS_OK;
}
static HRESULT WINAPI IDsDriverImpl_Open(PIDSDRIVER iface)
{
/* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
TRACE("(%p)\n",iface);
return DS_OK;
}
static HRESULT WINAPI IDsDriverImpl_Close(PIDSDRIVER iface)
{
/* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
TRACE("(%p)\n",iface);
return DS_OK;
}
static HRESULT WINAPI IDsDriverImpl_GetCaps(PIDSDRIVER iface, PDSDRIVERCAPS pCaps)
{
IDsDriverImpl *This = (IDsDriverImpl *)iface;
TRACE("(%p,%p)\n",iface,pCaps);
memcpy(pCaps, &(WOutDev[This->wDevID].ds_caps), sizeof(DSDRIVERCAPS));
return DS_OK;
}
static HRESULT WINAPI IDsDriverImpl_CreateSoundBuffer(PIDSDRIVER iface,
LPWAVEFORMATEX pwfx,
DWORD dwFlags, DWORD dwCardAddress,
LPDWORD pdwcbBufferSize,
LPBYTE *ppbBuffer,
LPVOID *ppvObj)
{
IDsDriverImpl *This = (IDsDriverImpl *)iface;
IDsDriverBufferImpl** ippdsdb = (IDsDriverBufferImpl**)ppvObj;
int err;
TRACE("(%p,%p,%x,%x)\n",iface,pwfx,dwFlags,dwCardAddress);
/* we only support primary buffers */
if (!(dwFlags & DSBCAPS_PRIMARYBUFFER))
return DSERR_UNSUPPORTED;
if (This->primary)
return DSERR_ALLOCATED;
if (dwFlags & (DSBCAPS_CTRLFREQUENCY | DSBCAPS_CTRLPAN))
return DSERR_CONTROLUNAVAIL;
*ippdsdb = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverBufferImpl));
if (*ippdsdb == NULL)
return DSERR_OUTOFMEMORY;
(*ippdsdb)->lpVtbl = &dsdbvt;
(*ippdsdb)->ref = 1;
(*ippdsdb)->drv = This;
err = DSDB_CreateMMAP((*ippdsdb));
if ( err != DS_OK )
{
HeapFree(GetProcessHeap(), 0, *ippdsdb);
*ippdsdb = NULL;
return err;
}
*ppbBuffer = (*ippdsdb)->mmap_buffer;
*pdwcbBufferSize = (*ippdsdb)->mmap_buflen_bytes;
This->primary = *ippdsdb;
/* buffer is ready to go */
TRACE("buffer created at %p\n", *ippdsdb);
return DS_OK;
}
static HRESULT WINAPI IDsDriverImpl_DuplicateSoundBuffer(PIDSDRIVER iface,
PIDSDRIVERBUFFER pBuffer,
LPVOID *ppvObj)
{
/* IDsDriverImpl *This = (IDsDriverImpl *)iface; */
TRACE("(%p,%p): stub\n",iface,pBuffer);
return DSERR_INVALIDCALL;
}
static const IDsDriverVtbl dsdvt =
{
IDsDriverImpl_QueryInterface,
IDsDriverImpl_AddRef,
IDsDriverImpl_Release,
IDsDriverImpl_GetDriverDesc,
IDsDriverImpl_Open,
IDsDriverImpl_Close,
IDsDriverImpl_GetCaps,
IDsDriverImpl_CreateSoundBuffer,
IDsDriverImpl_DuplicateSoundBuffer
};
DWORD wodDsCreate(UINT wDevID, PIDSDRIVER* drv)
{
IDsDriverImpl** idrv = (IDsDriverImpl**)drv;
TRACE("driver created\n");
/* the HAL isn't much better than the HEL if we can't do mmap() */
if (!(WOutDev[wDevID].outcaps.dwSupport & WAVECAPS_DIRECTSOUND)) {
ERR("DirectSound flag not set\n");
MESSAGE("This sound card's driver does not support direct access\n");
MESSAGE("The (slower) DirectSound HEL mode will be used instead.\n");
return MMSYSERR_NOTSUPPORTED;
}
*idrv = HeapAlloc(GetProcessHeap(),0,sizeof(IDsDriverImpl));
if (!*idrv)
return MMSYSERR_NOMEM;
(*idrv)->lpVtbl = &dsdvt;
(*idrv)->ref = 1;
(*idrv)->wDevID = wDevID;
(*idrv)->primary = NULL;
return MMSYSERR_NOERROR;
}
DWORD wodDsDesc(UINT wDevID, PDSDRIVERDESC desc)
{
memcpy(desc, &(WOutDev[wDevID].ds_desc), sizeof(DSDRIVERDESC));
return MMSYSERR_NOERROR;
}
#endif /* HAVE_ALSA */
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