Mercurial > sdl-ios-xcode
diff src/audio/paudio/SDL_paudio.c @ 1895:c121d94672cb
SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
author | Sam Lantinga <slouken@libsdl.org> |
---|---|
date | Mon, 10 Jul 2006 21:04:37 +0000 |
parents | d910939febfa |
children | 3b4ce57c6215 |
line wrap: on
line diff
--- a/src/audio/paudio/SDL_paudio.c Thu Jul 06 18:01:37 2006 +0000 +++ b/src/audio/paudio/SDL_paudio.c Mon Jul 10 21:04:37 2006 +0000 @@ -55,7 +55,7 @@ #define OPEN_FLAGS O_WRONLY /* Audio driver functions */ -static int Paud_OpenAudio(_THIS, SDL_AudioSpec *spec); +static int Paud_OpenAudio(_THIS, SDL_AudioSpec * spec); static void Paud_WaitAudio(_THIS); static void Paud_PlayAudio(_THIS); static Uint8 *Paud_GetAudioBuf(_THIS); @@ -63,112 +63,116 @@ /* Audio driver bootstrap functions */ -static int Audio_Available(void) +static int +Audio_Available(void) { - int fd; - int available; + int fd; + int available; - available = 0; - fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 0); - if ( fd >= 0 ) { - available = 1; - close(fd); - } - return(available); + available = 0; + fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 0); + if (fd >= 0) { + available = 1; + close(fd); + } + return (available); } -static void Audio_DeleteDevice(SDL_AudioDevice *device) +static void +Audio_DeleteDevice(SDL_AudioDevice * device) { - SDL_free(device->hidden); - SDL_free(device); + SDL_free(device->hidden); + SDL_free(device); } -static SDL_AudioDevice *Audio_CreateDevice(int devindex) +static SDL_AudioDevice * +Audio_CreateDevice(int devindex) { - SDL_AudioDevice *this; + SDL_AudioDevice *this; - /* Initialize all variables that we clean on shutdown */ - this = (SDL_AudioDevice *)SDL_malloc(sizeof(SDL_AudioDevice)); - if ( this ) { - SDL_memset(this, 0, (sizeof *this)); - this->hidden = (struct SDL_PrivateAudioData *) - SDL_malloc((sizeof *this->hidden)); - } - if ( (this == NULL) || (this->hidden == NULL) ) { - SDL_OutOfMemory(); - if ( this ) { - SDL_free(this); - } - return(0); - } - SDL_memset(this->hidden, 0, (sizeof *this->hidden)); - audio_fd = -1; + /* Initialize all variables that we clean on shutdown */ + this = (SDL_AudioDevice *) SDL_malloc(sizeof(SDL_AudioDevice)); + if (this) { + SDL_memset(this, 0, (sizeof *this)); + this->hidden = (struct SDL_PrivateAudioData *) + SDL_malloc((sizeof *this->hidden)); + } + if ((this == NULL) || (this->hidden == NULL)) { + SDL_OutOfMemory(); + if (this) { + SDL_free(this); + } + return (0); + } + SDL_memset(this->hidden, 0, (sizeof *this->hidden)); + audio_fd = -1; - /* Set the function pointers */ - this->OpenAudio = Paud_OpenAudio; - this->WaitAudio = Paud_WaitAudio; - this->PlayAudio = Paud_PlayAudio; - this->GetAudioBuf = Paud_GetAudioBuf; - this->CloseAudio = Paud_CloseAudio; + /* Set the function pointers */ + this->OpenAudio = Paud_OpenAudio; + this->WaitAudio = Paud_WaitAudio; + this->PlayAudio = Paud_PlayAudio; + this->GetAudioBuf = Paud_GetAudioBuf; + this->CloseAudio = Paud_CloseAudio; - this->free = Audio_DeleteDevice; + this->free = Audio_DeleteDevice; - return this; + return this; } AudioBootStrap Paud_bootstrap = { - Paud_DRIVER_NAME, "AIX Paudio", - Audio_Available, Audio_CreateDevice + Paud_DRIVER_NAME, "AIX Paudio", + Audio_Available, Audio_CreateDevice }; /* This function waits until it is possible to write a full sound buffer */ -static void Paud_WaitAudio(_THIS) +static void +Paud_WaitAudio(_THIS) { fd_set fdset; /* See if we need to use timed audio synchronization */ - if ( frame_ticks ) { + if (frame_ticks) { /* Use timer for general audio synchronization */ Sint32 ticks; - ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS; - if ( ticks > 0 ) { - SDL_Delay(ticks); + ticks = ((Sint32) (next_frame - SDL_GetTicks())) - FUDGE_TICKS; + if (ticks > 0) { + SDL_Delay(ticks); } } else { - audio_buffer paud_bufinfo; + audio_buffer paud_bufinfo; /* Use select() for audio synchronization */ struct timeval timeout; FD_ZERO(&fdset); FD_SET(audio_fd, &fdset); - if ( ioctl(audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0 ) { + if (ioctl(audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0) { #ifdef DEBUG_AUDIO fprintf(stderr, "Couldn't get audio buffer information\n"); #endif - timeout.tv_sec = 10; + timeout.tv_sec = 10; timeout.tv_usec = 0; } else { - long ms_in_buf = paud_bufinfo.write_buf_time; - timeout.tv_sec = ms_in_buf/1000; - ms_in_buf = ms_in_buf - timeout.tv_sec*1000; - timeout.tv_usec = ms_in_buf*1000; + long ms_in_buf = paud_bufinfo.write_buf_time; + timeout.tv_sec = ms_in_buf / 1000; + ms_in_buf = ms_in_buf - timeout.tv_sec * 1000; + timeout.tv_usec = ms_in_buf * 1000; #ifdef DEBUG_AUDIO - fprintf( stderr, - "Waiting for write_buf_time=%ld,%ld\n", - timeout.tv_sec, - timeout.tv_usec ); + fprintf(stderr, + "Waiting for write_buf_time=%ld,%ld\n", + timeout.tv_sec, timeout.tv_usec); #endif - } + } #ifdef DEBUG_AUDIO fprintf(stderr, "Waiting for audio to get ready\n"); #endif - if ( select(audio_fd+1, NULL, &fdset, NULL, &timeout) <= 0 ) { - const char *message = "Audio timeout - buggy audio driver? (disabled)"; + if (select(audio_fd + 1, NULL, &fdset, NULL, &timeout) <= 0) { + const char *message = + "Audio timeout - buggy audio driver? (disabled)"; /* - * In general we should never print to the screen, + * In general we should never print to the screen, * but in this case we have no other way of letting * the user know what happened. */ @@ -186,326 +190,326 @@ } } -static void Paud_PlayAudio(_THIS) +static void +Paud_PlayAudio(_THIS) { - int written; + int written; - /* Write the audio data, checking for EAGAIN on broken audio drivers */ - do { - written = write(audio_fd, mixbuf, mixlen); - if ( (written < 0) && ((errno == 0) || (errno == EAGAIN)) ) { - SDL_Delay(1); /* Let a little CPU time go by */ - } - } while ( (written < 0) && - ((errno == 0) || (errno == EAGAIN) || (errno == EINTR)) ); + /* Write the audio data, checking for EAGAIN on broken audio drivers */ + do { + written = write(audio_fd, mixbuf, mixlen); + if ((written < 0) && ((errno == 0) || (errno == EAGAIN))) { + SDL_Delay(1); /* Let a little CPU time go by */ + } + } + while ((written < 0) && + ((errno == 0) || (errno == EAGAIN) || (errno == EINTR))); - /* If timer synchronization is enabled, set the next write frame */ - if ( frame_ticks ) { - next_frame += frame_ticks; - } + /* If timer synchronization is enabled, set the next write frame */ + if (frame_ticks) { + next_frame += frame_ticks; + } - /* If we couldn't write, assume fatal error for now */ - if ( written < 0 ) { - this->enabled = 0; - } + /* If we couldn't write, assume fatal error for now */ + if (written < 0) { + this->enabled = 0; + } #ifdef DEBUG_AUDIO - fprintf(stderr, "Wrote %d bytes of audio data\n", written); + fprintf(stderr, "Wrote %d bytes of audio data\n", written); #endif } -static Uint8 *Paud_GetAudioBuf(_THIS) +static Uint8 * +Paud_GetAudioBuf(_THIS) { - return mixbuf; + return mixbuf; } -static void Paud_CloseAudio(_THIS) +static void +Paud_CloseAudio(_THIS) { - if ( mixbuf != NULL ) { - SDL_FreeAudioMem(mixbuf); - mixbuf = NULL; - } - if ( audio_fd >= 0 ) { - close(audio_fd); - audio_fd = -1; - } + if (mixbuf != NULL) { + SDL_FreeAudioMem(mixbuf); + mixbuf = NULL; + } + if (audio_fd >= 0) { + close(audio_fd); + audio_fd = -1; + } } -static int Paud_OpenAudio(_THIS, SDL_AudioSpec *spec) +static int +Paud_OpenAudio(_THIS, SDL_AudioSpec * spec) { - char audiodev[1024]; - int format; - int bytes_per_sample; - Uint16 test_format; - audio_init paud_init; - audio_buffer paud_bufinfo; - audio_status paud_status; - audio_control paud_control; - audio_change paud_change; + char audiodev[1024]; + int format; + int bytes_per_sample; + Uint16 test_format; + audio_init paud_init; + audio_buffer paud_bufinfo; + audio_status paud_status; + audio_control paud_control; + audio_change paud_change; - /* Reset the timer synchronization flag */ - frame_ticks = 0.0; + /* Reset the timer synchronization flag */ + frame_ticks = 0.0; - /* Open the audio device */ - audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0); - if ( audio_fd < 0 ) { - SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); - return -1; - } + /* Open the audio device */ + audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0); + if (audio_fd < 0) { + SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno)); + return -1; + } - /* - * We can't set the buffer size - just ask the device for the maximum - * that we can have. - */ - if ( ioctl(audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0 ) { - SDL_SetError("Couldn't get audio buffer information"); - return -1; - } + /* + * We can't set the buffer size - just ask the device for the maximum + * that we can have. + */ + if (ioctl(audio_fd, AUDIO_BUFFER, &paud_bufinfo) < 0) { + SDL_SetError("Couldn't get audio buffer information"); + return -1; + } - mixbuf = NULL; + mixbuf = NULL; - if ( spec->channels > 1 ) - spec->channels = 2; - else - spec->channels = 1; + if (spec->channels > 1) + spec->channels = 2; + else + spec->channels = 1; - /* - * Fields in the audio_init structure: - * - * Ignored by us: - * - * paud.loadpath[LOAD_PATH]; * DSP code to load, MWave chip only? - * paud.slot_number; * slot number of the adapter - * paud.device_id; * adapter identification number - * - * Input: - * - * paud.srate; * the sampling rate in Hz - * paud.bits_per_sample; * 8, 16, 32, ... - * paud.bsize; * block size for this rate - * paud.mode; * ADPCM, PCM, MU_LAW, A_LAW, SOURCE_MIX - * paud.channels; * 1=mono, 2=stereo - * paud.flags; * FIXED - fixed length data - * * LEFT_ALIGNED, RIGHT_ALIGNED (var len only) - * * TWOS_COMPLEMENT - 2's complement data - * * SIGNED - signed? comment seems wrong in sys/audio.h - * * BIG_ENDIAN - * paud.operation; * PLAY, RECORD - * - * Output: - * - * paud.flags; * PITCH - pitch is supported - * * INPUT - input is supported - * * OUTPUT - output is supported - * * MONITOR - monitor is supported - * * VOLUME - volume is supported - * * VOLUME_DELAY - volume delay is supported - * * BALANCE - balance is supported - * * BALANCE_DELAY - balance delay is supported - * * TREBLE - treble control is supported - * * BASS - bass control is supported - * * BESTFIT_PROVIDED - best fit returned - * * LOAD_CODE - DSP load needed - * paud.rc; * NO_PLAY - DSP code can't do play requests - * * NO_RECORD - DSP code can't do record requests - * * INVALID_REQUEST - request was invalid - * * CONFLICT - conflict with open's flags - * * OVERLOADED - out of DSP MIPS or memory - * paud.position_resolution; * smallest increment for position - */ + /* + * Fields in the audio_init structure: + * + * Ignored by us: + * + * paud.loadpath[LOAD_PATH]; * DSP code to load, MWave chip only? + * paud.slot_number; * slot number of the adapter + * paud.device_id; * adapter identification number + * + * Input: + * + * paud.srate; * the sampling rate in Hz + * paud.bits_per_sample; * 8, 16, 32, ... + * paud.bsize; * block size for this rate + * paud.mode; * ADPCM, PCM, MU_LAW, A_LAW, SOURCE_MIX + * paud.channels; * 1=mono, 2=stereo + * paud.flags; * FIXED - fixed length data + * * LEFT_ALIGNED, RIGHT_ALIGNED (var len only) + * * TWOS_COMPLEMENT - 2's complement data + * * SIGNED - signed? comment seems wrong in sys/audio.h + * * BIG_ENDIAN + * paud.operation; * PLAY, RECORD + * + * Output: + * + * paud.flags; * PITCH - pitch is supported + * * INPUT - input is supported + * * OUTPUT - output is supported + * * MONITOR - monitor is supported + * * VOLUME - volume is supported + * * VOLUME_DELAY - volume delay is supported + * * BALANCE - balance is supported + * * BALANCE_DELAY - balance delay is supported + * * TREBLE - treble control is supported + * * BASS - bass control is supported + * * BESTFIT_PROVIDED - best fit returned + * * LOAD_CODE - DSP load needed + * paud.rc; * NO_PLAY - DSP code can't do play requests + * * NO_RECORD - DSP code can't do record requests + * * INVALID_REQUEST - request was invalid + * * CONFLICT - conflict with open's flags + * * OVERLOADED - out of DSP MIPS or memory + * paud.position_resolution; * smallest increment for position + */ - paud_init.srate = spec->freq; - paud_init.mode = PCM; - paud_init.operation = PLAY; - paud_init.channels = spec->channels; + paud_init.srate = spec->freq; + paud_init.mode = PCM; + paud_init.operation = PLAY; + paud_init.channels = spec->channels; - /* Try for a closest match on audio format */ - format = 0; - for ( test_format = SDL_FirstAudioFormat(spec->format); - ! format && test_format; ) { + /* Try for a closest match on audio format */ + format = 0; + for (test_format = SDL_FirstAudioFormat(spec->format); + !format && test_format;) { #ifdef DEBUG_AUDIO - fprintf(stderr, "Trying format 0x%4.4x\n", test_format); + fprintf(stderr, "Trying format 0x%4.4x\n", test_format); #endif - switch ( test_format ) { - case AUDIO_U8: - bytes_per_sample = 1; - paud_init.bits_per_sample = 8; - paud_init.flags = TWOS_COMPLEMENT | FIXED; - format = 1; - break; - case AUDIO_S8: - bytes_per_sample = 1; - paud_init.bits_per_sample = 8; - paud_init.flags = SIGNED | - TWOS_COMPLEMENT | FIXED; - format = 1; - break; - case AUDIO_S16LSB: - bytes_per_sample = 2; - paud_init.bits_per_sample = 16; - paud_init.flags = SIGNED | - TWOS_COMPLEMENT | FIXED; - format = 1; - break; - case AUDIO_S16MSB: - bytes_per_sample = 2; - paud_init.bits_per_sample = 16; - paud_init.flags = BIG_ENDIAN | - SIGNED | - TWOS_COMPLEMENT | FIXED; - format = 1; - break; - case AUDIO_U16LSB: - bytes_per_sample = 2; - paud_init.bits_per_sample = 16; - paud_init.flags = TWOS_COMPLEMENT | FIXED; - format = 1; - break; - case AUDIO_U16MSB: - bytes_per_sample = 2; - paud_init.bits_per_sample = 16; - paud_init.flags = BIG_ENDIAN | - TWOS_COMPLEMENT | FIXED; - format = 1; - break; - default: - break; - } - if ( ! format ) { - test_format = SDL_NextAudioFormat(); - } - } - if ( format == 0 ) { + switch (test_format) { + case AUDIO_U8: + bytes_per_sample = 1; + paud_init.bits_per_sample = 8; + paud_init.flags = TWOS_COMPLEMENT | FIXED; + format = 1; + break; + case AUDIO_S8: + bytes_per_sample = 1; + paud_init.bits_per_sample = 8; + paud_init.flags = SIGNED | TWOS_COMPLEMENT | FIXED; + format = 1; + break; + case AUDIO_S16LSB: + bytes_per_sample = 2; + paud_init.bits_per_sample = 16; + paud_init.flags = SIGNED | TWOS_COMPLEMENT | FIXED; + format = 1; + break; + case AUDIO_S16MSB: + bytes_per_sample = 2; + paud_init.bits_per_sample = 16; + paud_init.flags = BIG_ENDIAN | SIGNED | TWOS_COMPLEMENT | FIXED; + format = 1; + break; + case AUDIO_U16LSB: + bytes_per_sample = 2; + paud_init.bits_per_sample = 16; + paud_init.flags = TWOS_COMPLEMENT | FIXED; + format = 1; + break; + case AUDIO_U16MSB: + bytes_per_sample = 2; + paud_init.bits_per_sample = 16; + paud_init.flags = BIG_ENDIAN | TWOS_COMPLEMENT | FIXED; + format = 1; + break; + default: + break; + } + if (!format) { + test_format = SDL_NextAudioFormat(); + } + } + if (format == 0) { #ifdef DEBUG_AUDIO - fprintf(stderr, "Couldn't find any hardware audio formats\n"); + fprintf(stderr, "Couldn't find any hardware audio formats\n"); #endif - SDL_SetError("Couldn't find any hardware audio formats"); - return -1; - } - spec->format = test_format; + SDL_SetError("Couldn't find any hardware audio formats"); + return -1; + } + spec->format = test_format; - /* - * We know the buffer size and the max number of subsequent writes - * that can be pending. If more than one can pend, allow the application - * to do something like double buffering between our write buffer and - * the device's own buffer that we are filling with write() anyway. - * - * We calculate spec->samples like this because SDL_CalculateAudioSpec() - * will give put paud_bufinfo.write_buf_cap (or paud_bufinfo.write_buf_cap/2) - * into spec->size in return. - */ - if ( paud_bufinfo.request_buf_cap == 1 ) - { - spec->samples = paud_bufinfo.write_buf_cap - / bytes_per_sample - / spec->channels; - } - else - { - spec->samples = paud_bufinfo.write_buf_cap - / bytes_per_sample - / spec->channels - / 2; - } - paud_init.bsize = bytes_per_sample * spec->channels; + /* + * We know the buffer size and the max number of subsequent writes + * that can be pending. If more than one can pend, allow the application + * to do something like double buffering between our write buffer and + * the device's own buffer that we are filling with write() anyway. + * + * We calculate spec->samples like this because SDL_CalculateAudioSpec() + * will give put paud_bufinfo.write_buf_cap (or paud_bufinfo.write_buf_cap/2) + * into spec->size in return. + */ + if (paud_bufinfo.request_buf_cap == 1) { + spec->samples = paud_bufinfo.write_buf_cap + / bytes_per_sample / spec->channels; + } else { + spec->samples = paud_bufinfo.write_buf_cap + / bytes_per_sample / spec->channels / 2; + } + paud_init.bsize = bytes_per_sample * spec->channels; - SDL_CalculateAudioSpec(spec); + SDL_CalculateAudioSpec(spec); - /* - * The AIX paud device init can't modify the values of the audio_init - * structure that we pass to it. So we don't need any recalculation - * of this stuff and no reinit call as in linux dsp and dma code. - * - * /dev/paud supports all of the encoding formats, so we don't need - * to do anything like reopening the device, either. - */ - if ( ioctl(audio_fd, AUDIO_INIT, &paud_init) < 0 ) { - switch ( paud_init.rc ) - { - case 1 : - SDL_SetError("Couldn't set audio format: DSP can't do play requests"); - return -1; - break; - case 2 : - SDL_SetError("Couldn't set audio format: DSP can't do record requests"); - return -1; - break; - case 4 : - SDL_SetError("Couldn't set audio format: request was invalid"); - return -1; - break; - case 5 : - SDL_SetError("Couldn't set audio format: conflict with open's flags"); - return -1; - break; - case 6 : - SDL_SetError("Couldn't set audio format: out of DSP MIPS or memory"); - return -1; - break; - default : - SDL_SetError("Couldn't set audio format: not documented in sys/audio.h"); - return -1; - break; - } - } + /* + * The AIX paud device init can't modify the values of the audio_init + * structure that we pass to it. So we don't need any recalculation + * of this stuff and no reinit call as in linux dsp and dma code. + * + * /dev/paud supports all of the encoding formats, so we don't need + * to do anything like reopening the device, either. + */ + if (ioctl(audio_fd, AUDIO_INIT, &paud_init) < 0) { + switch (paud_init.rc) { + case 1: + SDL_SetError + ("Couldn't set audio format: DSP can't do play requests"); + return -1; + break; + case 2: + SDL_SetError + ("Couldn't set audio format: DSP can't do record requests"); + return -1; + break; + case 4: + SDL_SetError("Couldn't set audio format: request was invalid"); + return -1; + break; + case 5: + SDL_SetError + ("Couldn't set audio format: conflict with open's flags"); + return -1; + break; + case 6: + SDL_SetError + ("Couldn't set audio format: out of DSP MIPS or memory"); + return -1; + break; + default: + SDL_SetError + ("Couldn't set audio format: not documented in sys/audio.h"); + return -1; + break; + } + } - /* Allocate mixing buffer */ - mixlen = spec->size; - mixbuf = (Uint8 *)SDL_AllocAudioMem(mixlen); - if ( mixbuf == NULL ) { - return -1; - } - SDL_memset(mixbuf, spec->silence, spec->size); + /* Allocate mixing buffer */ + mixlen = spec->size; + mixbuf = (Uint8 *) SDL_AllocAudioMem(mixlen); + if (mixbuf == NULL) { + return -1; + } + SDL_memset(mixbuf, spec->silence, spec->size); - /* - * Set some paramters: full volume, first speaker that we can find. - * Ignore the other settings for now. - */ - paud_change.input = AUDIO_IGNORE; /* the new input source */ - paud_change.output = OUTPUT_1; /* EXTERNAL_SPEAKER,INTERNAL_SPEAKER,OUTPUT_1 */ - paud_change.monitor = AUDIO_IGNORE; /* the new monitor state */ - paud_change.volume = 0x7fffffff; /* volume level [0-0x7fffffff] */ - paud_change.volume_delay = AUDIO_IGNORE; /* the new volume delay */ - paud_change.balance = 0x3fffffff; /* the new balance */ - paud_change.balance_delay = AUDIO_IGNORE; /* the new balance delay */ - paud_change.treble = AUDIO_IGNORE; /* the new treble state */ - paud_change.bass = AUDIO_IGNORE; /* the new bass state */ - paud_change.pitch = AUDIO_IGNORE; /* the new pitch state */ + /* + * Set some paramters: full volume, first speaker that we can find. + * Ignore the other settings for now. + */ + paud_change.input = AUDIO_IGNORE; /* the new input source */ + paud_change.output = OUTPUT_1; /* EXTERNAL_SPEAKER,INTERNAL_SPEAKER,OUTPUT_1 */ + paud_change.monitor = AUDIO_IGNORE; /* the new monitor state */ + paud_change.volume = 0x7fffffff; /* volume level [0-0x7fffffff] */ + paud_change.volume_delay = AUDIO_IGNORE; /* the new volume delay */ + paud_change.balance = 0x3fffffff; /* the new balance */ + paud_change.balance_delay = AUDIO_IGNORE; /* the new balance delay */ + paud_change.treble = AUDIO_IGNORE; /* the new treble state */ + paud_change.bass = AUDIO_IGNORE; /* the new bass state */ + paud_change.pitch = AUDIO_IGNORE; /* the new pitch state */ - paud_control.ioctl_request = AUDIO_CHANGE; - paud_control.request_info = (char*)&paud_change; - if ( ioctl(audio_fd, AUDIO_CONTROL, &paud_control) < 0 ) { + paud_control.ioctl_request = AUDIO_CHANGE; + paud_control.request_info = (char *) &paud_change; + if (ioctl(audio_fd, AUDIO_CONTROL, &paud_control) < 0) { #ifdef DEBUG_AUDIO - fprintf(stderr, "Can't change audio display settings\n" ); + fprintf(stderr, "Can't change audio display settings\n"); #endif - } + } - /* - * Tell the device to expect data. Actual start will wait for - * the first write() call. - */ - paud_control.ioctl_request = AUDIO_START; - paud_control.position = 0; - if ( ioctl(audio_fd, AUDIO_CONTROL, &paud_control) < 0 ) { + /* + * Tell the device to expect data. Actual start will wait for + * the first write() call. + */ + paud_control.ioctl_request = AUDIO_START; + paud_control.position = 0; + if (ioctl(audio_fd, AUDIO_CONTROL, &paud_control) < 0) { #ifdef DEBUG_AUDIO - fprintf(stderr, "Can't start audio play\n" ); + fprintf(stderr, "Can't start audio play\n"); #endif - SDL_SetError("Can't start audio play"); - return -1; - } + SDL_SetError("Can't start audio play"); + return -1; + } - /* Check to see if we need to use select() workaround */ - { char *workaround; - workaround = SDL_getenv("SDL_DSP_NOSELECT"); - if ( workaround ) { - frame_ticks = (float)(spec->samples*1000)/spec->freq; - next_frame = SDL_GetTicks()+frame_ticks; - } + /* Check to see if we need to use select() workaround */ + { + char *workaround; + workaround = SDL_getenv("SDL_DSP_NOSELECT"); + if (workaround) { + frame_ticks = (float) (spec->samples * 1000) / spec->freq; + next_frame = SDL_GetTicks() + frame_ticks; } + } - /* Get the parent process id (we're the parent of the audio thread) */ - parent = getpid(); + /* Get the parent process id (we're the parent of the audio thread) */ + parent = getpid(); - /* We're ready to rock and roll. :-) */ - return 0; + /* We're ready to rock and roll. :-) */ + return 0; } +/* vi: set ts=4 sw=4 expandtab: */