Mercurial > sdl-ios-xcode
view src/audio/qsa/SDL_qsa_audio.c @ 3168:6338b7f2d024
Hi,
I have prepared a set of patches to readd WindowsCE support to SDL 1.3.
I've created a new GAPI/Rawframebuffer and a DirectDraw renderer.
Both renderers are work in progress and there are several unimplemented
cases. (Notably
RenderLine/RenderPoint/RenderFill/QueryTexturePixels/UpdateTexture and
texture blending )
Nevertheless I am successfully using these renderers together with the
SDL software renderer. (On most devices the SDL software renderer will
be much faster as there are only badly optimized vendor drivers available)
I send these patches now in this unpolished state because there seems to
be some interest in win ce and someone has to start supporting SDL 1.3
Now on to the patches:
wince_events_window_fixes.patch
fixes some wince incompatibilities and adds fullscreen support via
SHFullScreen. NOTE: This patch shouldn't have any side effects on
Windows, but I have NOT tested it on Windows, so please double-check.
This patch doesn't dependent on the following ones.
wince_renderers_system.patch
This patch does all necessary modifications to the SDL system.
- it adds the renderers to the configure system
- it adds the renderers to win32video
SDL_ceddrawrender.c
SDL_ceddrawrender.h
SDL_gapirender_c.h
SDL_gapirender.c
SDL_gapirender.h
these files add the new render drivers and should be placed in
src/video/win32
Some notes to people who want to test this:
- I have only compiled sdl with ming32ce, so the VisualC files are not
up to date
- As mingw32ce has no ddraw.h this file must be taken from the MS SDK
and modified to work with gcc
- I had to modify line 2611 in configure.in to
EXTRA_LDFLAGS="$EXTRA_LDFLAGS -lcoredll -lcommctrl -lmmtimer
-Wl,--image-base -Wl,0x10000"
otherwise GetCPinfo wouldn't link. If someone knows whats causing this
I'd be happy to hear about it.
It would be great if these patches could make their way into SVN as this
would make collaboration much much easier.
I'm out of office for the next week and therefore will be unavailable
via email.
Regards
Stefan
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Sun, 07 Jun 2009 02:44:46 +0000 |
parents | 7f684f249ec9 |
children | f7b03b6838cb |
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line source
/* SDL - Simple DirectMedia Layer Copyright (C) 1997-2009 Sam Lantinga This library is free software; you can redistribute it and/or modify it under the terms of the GNU Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with this library; if not, write to the Free Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA Sam Lantinga slouken@libsdl.org QNX Sound Architecture (QSA) SDL driver Copyright (C) 2009 Mike Gorchak (mike@malva.ua, lestat@i.com.ua) */ #include "SDL_config.h" #include <errno.h> #include <unistd.h> #include <fcntl.h> #include <signal.h> #include <sys/types.h> #include <sys/time.h> #include <sched.h> #include <sys/select.h> #include <sys/neutrino.h> #include <sys/asoundlib.h> #include "SDL_timer.h" #include "SDL_audio.h" #include "../SDL_audiomem.h" #include "../SDL_audio_c.h" #include "SDL_qsa_audio.h" /* The tag name used by QSA audio framework */ #define DRIVER_NAME "qsa" /* default channel communication parameters */ #define DEFAULT_CPARAMS_RATE 44100 #define DEFAULT_CPARAMS_VOICES 1 #define DEFAULT_CPARAMS_FRAG_SIZE 4096 #define DEFAULT_CPARAMS_FRAGS_MIN 1 #define DEFAULT_CPARAMS_FRAGS_MAX 1 #define QSA_NO_WORKAROUNDS 0x00000000 #define QSA_MMAP_WORKAROUND 0x00000001 struct BuggyCards { char *cardname; unsigned long bugtype; }; #define QSA_WA_CARDS 3 #define QSA_MAX_CARD_NAME_LENGTH 33 struct BuggyCards buggycards[QSA_WA_CARDS] = { {"Sound Blaster Live!", QSA_MMAP_WORKAROUND}, {"Vortex 8820", QSA_MMAP_WORKAROUND}, {"Vortex 8830", QSA_MMAP_WORKAROUND}, }; /* List of found devices */ #define QSA_MAX_DEVICES 32 #define QSA_MAX_NAME_LENGTH 81+16 /* Hardcoded in QSA, can't be changed */ typedef struct _QSA_Device { char name[QSA_MAX_NAME_LENGTH]; /* Long audio device name for SDL */ int cardno; int deviceno; } QSA_Device; QSA_Device qsa_playback_device[QSA_MAX_DEVICES]; uint32_t qsa_playback_devices; QSA_Device qsa_capture_device[QSA_MAX_DEVICES]; uint32_t qsa_capture_devices; static inline void QSA_SetError(const char *fn, int status) { SDL_SetError("QSA: %s() failed: %s", fn, snd_strerror(status)); } /* card names check to apply the workarounds */ static int QSA_CheckBuggyCards(_THIS, unsigned long checkfor) { char scardname[QSA_MAX_CARD_NAME_LENGTH]; int it; if (snd_card_get_name (this->hidden->cardno, scardname, QSA_MAX_CARD_NAME_LENGTH - 1) < 0) { return 0; } for (it = 0; it < QSA_WA_CARDS; it++) { if (SDL_strcmp(buggycards[it].cardname, scardname) == 0) { if (buggycards[it].bugtype == checkfor) { return 1; } } } return 0; } static void QSA_ThreadInit(_THIS) { struct sched_param param; int status; /* Increase default 10 priority to 25 to avoid jerky sound */ status = SchedGet(0, 0, ¶m); param.sched_priority = param.sched_curpriority + 15; status = SchedSet(0, 0, SCHED_NOCHANGE, ¶m); } /* PCM channel parameters initialize function */ static void QSA_InitAudioParams(snd_pcm_channel_params_t * cpars) { SDL_memset(cpars, 0, sizeof(snd_pcm_channel_params_t)); cpars->channel = SND_PCM_CHANNEL_PLAYBACK; cpars->mode = SND_PCM_MODE_BLOCK; cpars->start_mode = SND_PCM_START_DATA; cpars->stop_mode = SND_PCM_STOP_STOP; cpars->format.format = SND_PCM_SFMT_S16_LE; cpars->format.interleave = 1; cpars->format.rate = DEFAULT_CPARAMS_RATE; cpars->format.voices = DEFAULT_CPARAMS_VOICES; cpars->buf.block.frag_size = DEFAULT_CPARAMS_FRAG_SIZE; cpars->buf.block.frags_min = DEFAULT_CPARAMS_FRAGS_MIN; cpars->buf.block.frags_max = DEFAULT_CPARAMS_FRAGS_MAX; } /* This function waits until it is possible to write a full sound buffer */ static void QSA_WaitDevice(_THIS) { fd_set wfds; fd_set rfds; int selectret; struct timeval timeout; if (!this->hidden->iscapture) { FD_ZERO(&wfds); FD_SET(this->hidden->audio_fd, &wfds); } else { FD_ZERO(&rfds); FD_SET(this->hidden->audio_fd, &rfds); } do { /* Setup timeout for playing one fragment equal to 2 seconds */ /* If timeout occured than something wrong with hardware or driver */ /* For example, Vortex 8820 audio driver stucks on second DAC because */ /* it doesn't exist ! */ timeout.tv_sec = 2; timeout.tv_usec = 0; this->hidden->timeout_on_wait = 0; if (!this->hidden->iscapture) { selectret = select(this->hidden->audio_fd + 1, NULL, &wfds, NULL, &timeout); } else { selectret = select(this->hidden->audio_fd + 1, &rfds, NULL, NULL, &timeout); } switch (selectret) { case -1: { SDL_SetError("QSA: select() failed: %s\n", strerror(errno)); return; } break; case 0: { SDL_SetError("QSA: timeout on buffer waiting occured\n"); this->hidden->timeout_on_wait = 1; return; } break; default: { if (!this->hidden->iscapture) { if (FD_ISSET(this->hidden->audio_fd, &wfds)) { return; } } else { if (FD_ISSET(this->hidden->audio_fd, &rfds)) { return; } } } break; } } while (1); } static void QSA_PlayDevice(_THIS) { snd_pcm_channel_status_t cstatus; int written; int status; int towrite; void *pcmbuffer; if ((!this->enabled) || (!this->hidden)) { return; } towrite = this->spec.size; pcmbuffer = this->hidden->pcm_buf; /* Write the audio data, checking for EAGAIN (buffer full) and underrun */ do { written = snd_pcm_plugin_write(this->hidden->audio_handle, pcmbuffer, towrite); if (written != towrite) { /* Check if samples playback got stuck somewhere in hardware or in */ /* the audio device driver */ if ((errno == EAGAIN) && (written == 0)) { if (this->hidden->timeout_on_wait != 0) { SDL_SetError("QSA: buffer playback timeout\n"); return; } } /* Check for errors or conditions */ if ((errno == EAGAIN) || (errno == EWOULDBLOCK)) { /* Let a little CPU time go by and try to write again */ SDL_Delay(1); /* if we wrote some data */ towrite -= written; pcmbuffer += written * this->spec.channels; continue; } else { if ((errno == EINVAL) || (errno == EIO)) { SDL_memset(&cstatus, 0, sizeof(cstatus)); if (!this->hidden->iscapture) { cstatus.channel = SND_PCM_CHANNEL_PLAYBACK; } else { cstatus.channel = SND_PCM_CHANNEL_CAPTURE; } status = snd_pcm_plugin_status(this->hidden->audio_handle, &cstatus); if (status < 0) { QSA_SetError("snd_pcm_plugin_status", status); return; } if ((cstatus.status == SND_PCM_STATUS_UNDERRUN) || (cstatus.status == SND_PCM_STATUS_READY)) { if (!this->hidden->iscapture) { status = snd_pcm_plugin_prepare(this->hidden-> audio_handle, SND_PCM_CHANNEL_PLAYBACK); } else { status = snd_pcm_plugin_prepare(this->hidden-> audio_handle, SND_PCM_CHANNEL_CAPTURE); } if (status < 0) { QSA_SetError("snd_pcm_plugin_prepare", status); return; } } continue; } else { return; } } } else { /* we wrote all remaining data */ towrite -= written; pcmbuffer += written * this->spec.channels; } } while ((towrite > 0) && (this->enabled)); /* If we couldn't write, assume fatal error for now */ if (towrite != 0) { this->enabled = 0; } } static Uint8 * QSA_GetDeviceBuf(_THIS) { return this->hidden->pcm_buf; } static void QSA_CloseDevice(_THIS) { if (this->hidden != NULL) { if (this->hidden->audio_handle != NULL) { if (!this->hidden->iscapture) { /* Finish playing available samples */ snd_pcm_plugin_flush(this->hidden->audio_handle, SND_PCM_CHANNEL_PLAYBACK); } else { /* Cancel unread samples during capture */ snd_pcm_plugin_flush(this->hidden->audio_handle, SND_PCM_CHANNEL_CAPTURE); } snd_pcm_close(this->hidden->audio_handle); this->hidden->audio_handle = NULL; } if (this->hidden->pcm_buf != NULL) { SDL_FreeAudioMem(this->hidden->pcm_buf); this->hidden->pcm_buf = NULL; } SDL_free(this->hidden); this->hidden = NULL; } } static int QSA_OpenDevice(_THIS, const char *devname, int iscapture) { int status = 0; int format = 0; SDL_AudioFormat test_format = 0; int found = 0; snd_pcm_channel_setup_t csetup; snd_pcm_channel_params_t cparams; /* Initialize all variables that we clean on shutdown */ this->hidden = (struct SDL_PrivateAudioData *) SDL_calloc(1, (sizeof (struct SDL_PrivateAudioData))); if (this->hidden == NULL) { SDL_OutOfMemory(); return 0; } SDL_memset(this->hidden, 0, sizeof(struct SDL_PrivateAudioData)); /* Initialize channel transfer parameters to default */ QSA_InitAudioParams(&cparams); /* Initialize channel direction: capture or playback */ this->hidden->iscapture = iscapture; /* Find deviceid and cardid by device name for playback */ if ((!this->hidden->iscapture) && (devname != NULL)) { uint32_t device; int32_t status; /* Search in the playback devices */ device = 0; do { status = SDL_strcmp(qsa_playback_device[device].name, devname); if (status == 0) { /* Found requested device */ this->hidden->deviceno = qsa_playback_device[device].deviceno; this->hidden->cardno = qsa_playback_device[device].cardno; break; } device++; if (device >= qsa_playback_devices) { QSA_CloseDevice(this); SDL_SetError("No such playback device"); return 0; } } while (1); } /* Find deviceid and cardid by device name for capture */ if ((this->hidden->iscapture) && (devname != NULL)) { /* Search in the capture devices */ uint32_t device; int32_t status; /* Searching in the playback devices */ device = 0; do { status = SDL_strcmp(qsa_capture_device[device].name, devname); if (status == 0) { /* Found requested device */ this->hidden->deviceno = qsa_capture_device[device].deviceno; this->hidden->cardno = qsa_capture_device[device].cardno; break; } device++; if (device >= qsa_capture_devices) { QSA_CloseDevice(this); SDL_SetError("No such capture device"); return 0; } } while (1); } /* Check if SDL requested default audio device */ if (devname == NULL) { /* Open system default audio device */ if (!this->hidden->iscapture) { status = snd_pcm_open_preferred(&this->hidden->audio_handle, &this->hidden->cardno, &this->hidden->deviceno, SND_PCM_OPEN_PLAYBACK); } else { status = snd_pcm_open_preferred(&this->hidden->audio_handle, &this->hidden->cardno, &this->hidden->deviceno, SND_PCM_OPEN_CAPTURE); } } else { /* Open requested audio device */ if (!this->hidden->iscapture) { status = snd_pcm_open(&this->hidden->audio_handle, this->hidden->cardno, this->hidden->deviceno, SND_PCM_OPEN_PLAYBACK); } else { status = snd_pcm_open(&this->hidden->audio_handle, this->hidden->cardno, this->hidden->deviceno, SND_PCM_OPEN_CAPTURE); } } /* Check if requested device is opened */ if (status < 0) { this->hidden->audio_handle = NULL; QSA_CloseDevice(this); QSA_SetError("snd_pcm_open", status); return 0; } if (!QSA_CheckBuggyCards(this, QSA_MMAP_WORKAROUND)) { /* Disable QSA MMAP plugin for buggy audio drivers */ status = snd_pcm_plugin_set_disable(this->hidden->audio_handle, PLUGIN_DISABLE_MMAP); if (status < 0) { QSA_CloseDevice(this); QSA_SetError("snd_pcm_plugin_set_disable", status); return 0; } } /* Try for a closest match on audio format */ format = 0; /* can't use format as SND_PCM_SFMT_U8 = 0 in qsa */ found = 0; for (test_format = SDL_FirstAudioFormat(this->spec.format); !found;) { /* if match found set format to equivalent QSA format */ switch (test_format) { case AUDIO_U8: { format = SND_PCM_SFMT_U8; found = 1; } break; case AUDIO_S8: { format = SND_PCM_SFMT_S8; found = 1; } break; case AUDIO_S16LSB: { format = SND_PCM_SFMT_S16_LE; found = 1; } break; case AUDIO_S16MSB: { format = SND_PCM_SFMT_S16_BE; found = 1; } break; case AUDIO_U16LSB: { format = SND_PCM_SFMT_U16_LE; found = 1; } break; case AUDIO_U16MSB: { format = SND_PCM_SFMT_U16_BE; found = 1; } break; case AUDIO_S32LSB: { format = SND_PCM_SFMT_S32_LE; found = 1; } break; case AUDIO_S32MSB: { format = SND_PCM_SFMT_S32_BE; found = 1; } break; case AUDIO_F32LSB: { format = SND_PCM_SFMT_FLOAT_LE; found = 1; } break; case AUDIO_F32MSB: { format = SND_PCM_SFMT_FLOAT_BE; found = 1; } break; default: { break; } } if (!found) { test_format = SDL_NextAudioFormat(); } } /* assumes test_format not 0 on success */ if (test_format == 0) { QSA_CloseDevice(this); SDL_SetError("QSA: Couldn't find any hardware audio formats"); return 0; } this->spec.format = test_format; /* Set the audio format */ cparams.format.format = format; /* Set mono/stereo/4ch/6ch/8ch audio */ cparams.format.voices = this->spec.channels; /* Set rate */ cparams.format.rate = this->spec.freq; /* Setup the transfer parameters according to cparams */ status = snd_pcm_plugin_params(this->hidden->audio_handle, &cparams); if (status < 0) { QSA_CloseDevice(this); QSA_SetError("snd_pcm_channel_params", status); return 0; } /* Make sure channel is setup right one last time */ SDL_memset(&csetup, '\0', sizeof(csetup)); if (!this->hidden->iscapture) { csetup.channel = SND_PCM_CHANNEL_PLAYBACK; } else { csetup.channel = SND_PCM_CHANNEL_CAPTURE; } /* Setup an audio channel */ if (snd_pcm_plugin_setup(this->hidden->audio_handle, &csetup) < 0) { QSA_CloseDevice(this); SDL_SetError("QSA: Unable to setup channel\n"); return 0; } /* Calculate the final parameters for this audio specification */ SDL_CalculateAudioSpec(&this->spec); this->hidden->pcm_len = this->spec.size; if (this->hidden->pcm_len == 0) { this->hidden->pcm_len = csetup.buf.block.frag_size * this->spec.channels * (snd_pcm_format_width(format) / 8); } /* * Allocate memory to the audio buffer and initialize with silence * (Note that buffer size must be a multiple of fragment size, so find * closest multiple) */ this->hidden->pcm_buf = (Uint8 *) SDL_AllocAudioMem(this->hidden->pcm_len); if (this->hidden->pcm_buf == NULL) { QSA_CloseDevice(this); SDL_OutOfMemory(); return 0; } SDL_memset(this->hidden->pcm_buf, this->spec.silence, this->hidden->pcm_len); /* get the file descriptor */ if (!this->hidden->iscapture) { this->hidden->audio_fd = snd_pcm_file_descriptor(this->hidden->audio_handle, SND_PCM_CHANNEL_PLAYBACK); } else { this->hidden->audio_fd = snd_pcm_file_descriptor(this->hidden->audio_handle, SND_PCM_CHANNEL_CAPTURE); } if (this->hidden->audio_fd < 0) { QSA_CloseDevice(this); QSA_SetError("snd_pcm_file_descriptor", status); return 0; } /* Prepare an audio channel */ if (!this->hidden->iscapture) { /* Prepare audio playback */ status = snd_pcm_plugin_prepare(this->hidden->audio_handle, SND_PCM_CHANNEL_PLAYBACK); } else { /* Prepare audio capture */ status = snd_pcm_plugin_prepare(this->hidden->audio_handle, SND_PCM_CHANNEL_CAPTURE); } if (status < 0) { QSA_CloseDevice(this); QSA_SetError("snd_pcm_plugin_prepare", status); return 0; } /* We're really ready to rock and roll. :-) */ return 1; } int QSA_DetectDevices(int iscapture) { uint32_t it; uint32_t cards; uint32_t devices; int32_t status; /* Detect amount of available devices */ /* this value can be changed in the runtime */ cards = snd_cards(); /* If io-audio manager is not running we will get 0 as number */ /* of available audio devices */ if (cards == 0) { /* We have no any available audio devices */ return 0; } /* Find requested devices by type */ if (!iscapture) { /* Playback devices enumeration requested */ for (it = 0; it < cards; it++) { devices = 0; do { status = snd_card_get_longname(it, qsa_playback_device [qsa_playback_devices].name, QSA_MAX_NAME_LENGTH); if (status == EOK) { snd_pcm_t *handle; /* Add device number to device name */ sprintf(qsa_playback_device[qsa_playback_devices].name + SDL_strlen(qsa_playback_device [qsa_playback_devices].name), " d%d", devices); /* Store associated card number id */ qsa_playback_device[qsa_playback_devices].cardno = it; /* Check if this device id could play anything */ status = snd_pcm_open(&handle, it, devices, SND_PCM_OPEN_PLAYBACK); if (status == EOK) { qsa_playback_device[qsa_playback_devices].deviceno = devices; status = snd_pcm_close(handle); if (status == EOK) { qsa_playback_devices++; } } else { /* Check if we got end of devices list */ if (status == -ENOENT) { break; } } } else { break; } /* Check if we reached maximum devices count */ if (qsa_playback_devices >= QSA_MAX_DEVICES) { break; } devices++; } while (1); /* Check if we reached maximum devices count */ if (qsa_playback_devices >= QSA_MAX_DEVICES) { break; } } } else { /* Capture devices enumeration requested */ for (it = 0; it < cards; it++) { devices = 0; do { status = snd_card_get_longname(it, qsa_capture_device [qsa_capture_devices].name, QSA_MAX_NAME_LENGTH); if (status == EOK) { snd_pcm_t *handle; /* Add device number to device name */ sprintf(qsa_capture_device[qsa_capture_devices].name + SDL_strlen(qsa_capture_device [qsa_capture_devices].name), " d%d", devices); /* Store associated card number id */ qsa_capture_device[qsa_capture_devices].cardno = it; /* Check if this device id could play anything */ status = snd_pcm_open(&handle, it, devices, SND_PCM_OPEN_CAPTURE); if (status == EOK) { qsa_capture_device[qsa_capture_devices].deviceno = devices; status = snd_pcm_close(handle); if (status == EOK) { qsa_capture_devices++; } } else { /* Check if we got end of devices list */ if (status == -ENOENT) { break; } } /* Check if we reached maximum devices count */ if (qsa_capture_devices >= QSA_MAX_DEVICES) { break; } } else { break; } devices++; } while (1); /* Check if we reached maximum devices count */ if (qsa_capture_devices >= QSA_MAX_DEVICES) { break; } } } /* Return amount of available playback or capture devices */ if (!iscapture) { return qsa_playback_devices; } else { return qsa_capture_devices; } } const char * QSA_GetDeviceName(int index, int iscapture) { if (!iscapture) { if (index >= qsa_playback_devices) { return "No such playback device"; } return qsa_playback_device[index].name; } else { if (index >= qsa_capture_devices) { return "No such capture device"; } return qsa_capture_device[index].name; } } void QSA_WaitDone(_THIS) { if (!this->hidden->iscapture) { if (this->hidden->audio_handle != NULL) { /* Wait till last fragment is played and stop channel */ snd_pcm_plugin_flush(this->hidden->audio_handle, SND_PCM_CHANNEL_PLAYBACK); } } else { if (this->hidden->audio_handle != NULL) { /* Discard all unread data and stop channel */ snd_pcm_plugin_flush(this->hidden->audio_handle, SND_PCM_CHANNEL_CAPTURE); } } } void QSA_Deinitialize(void) { /* Clear devices array on shutdown */ SDL_memset(qsa_playback_device, 0x00, sizeof(QSA_Device) * QSA_MAX_DEVICES); SDL_memset(qsa_capture_device, 0x00, sizeof(QSA_Device) * QSA_MAX_DEVICES); qsa_playback_devices = 0; qsa_capture_devices = 0; } static int QSA_Init(SDL_AudioDriverImpl * impl) { snd_pcm_t *handle = NULL; int32_t status = 0; /* Clear devices array */ SDL_memset(qsa_playback_device, 0x00, sizeof(QSA_Device) * QSA_MAX_DEVICES); SDL_memset(qsa_capture_device, 0x00, sizeof(QSA_Device) * QSA_MAX_DEVICES); qsa_playback_devices = 0; qsa_capture_devices = 0; /* Set function pointers */ /* DeviceLock and DeviceUnlock functions are used default, */ /* provided by SDL, which uses pthread_mutex for lock/unlock */ impl->DetectDevices = QSA_DetectDevices; impl->GetDeviceName = QSA_GetDeviceName; impl->OpenDevice = QSA_OpenDevice; impl->ThreadInit = QSA_ThreadInit; impl->WaitDevice = QSA_WaitDevice; impl->PlayDevice = QSA_PlayDevice; impl->GetDeviceBuf = QSA_GetDeviceBuf; impl->CloseDevice = QSA_CloseDevice; impl->WaitDone = QSA_WaitDone; impl->Deinitialize = QSA_Deinitialize; impl->LockDevice = NULL; impl->UnlockDevice = NULL; impl->OnlyHasDefaultOutputDevice = 0; impl->ProvidesOwnCallbackThread = 0; impl->SkipMixerLock = 0; impl->HasCaptureSupport = 1; impl->OnlyHasDefaultOutputDevice = 0; impl->OnlyHasDefaultInputDevice = 0; /* Check if io-audio manager is running or not */ status = snd_cards(); if (status == 0) { /* if no, return immediately */ return 1; } /* At this point we are definitely has an audio device */ return 2; } AudioBootStrap QSAAUDIO_bootstrap = { DRIVER_NAME, "QNX QSA Audio", QSA_Init, 0 }; /* vi: set ts=4 sw=4 expandtab: */