src/audio/openbsd/SDL_openbsdaudio.c
author Sam Lantinga <slouken@lokigames.com>
Sun, 08 Jul 2001 09:00:06 +0000
changeset 94 ae6e6b73333f
parent 37 3ad7157c6cfa
child 121 43febd46d49d
permissions -rw-r--r--
Cleaned up the OpenBSD port, thanks to Peter Valchev
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997, 1998, 1999, 2000, 2001  Sam Lantinga
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    This library is free software; you can redistribute it and/or
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    modify it under the terms of the GNU Library General Public
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    License as published by the Free Software Foundation; either
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    version 2 of the License, or (at your option) any later version.
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    This library is distributed in the hope that it will be useful,
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    but WITHOUT ANY WARRANTY; without even the implied warranty of
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    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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    Library General Public License for more details.
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    You should have received a copy of the GNU Library General Public
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    License along with this library; if not, write to the Free
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    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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    Sam Lantinga
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    slouken@devolution.com
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*/
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/*
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 * Driver for native OpenBSD audio(4).
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 * vedge@vedge.com.ar.
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 */
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <sys/time.h>
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#include <sys/ioctl.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/audioio.h>
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#include "SDL_audio.h"
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#include "SDL_error.h"
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#include "SDL_audiomem.h"
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#include "SDL_audio_c.h"
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#include "SDL_timer.h"
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#include "SDL_audiodev_c.h"
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#include "SDL_openbsdaudio.h"
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/* The tag name used by OpenBSD audio */
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#define OBSD_DRIVER_NAME         "openbsd"
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/* Open the audio device for playback, and don't block if busy */
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/* #define USE_BLOCKING_WRITES */
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/* Use timer for synchronization */
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/* #define USE_TIMER_SYNC */
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/* #define DEBUG_AUDIO */
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/* #define DEBUG_AUDIO_STREAM */
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#ifdef USE_BLOCKING_WRITES
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#define OPEN_FLAGS	O_WRONLY
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#else
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#define OPEN_FLAGS	(O_WRONLY|O_NONBLOCK)
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#endif
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/* Audio driver functions */
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static void OBSD_WaitAudio(_THIS);
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static int OBSD_OpenAudio(_THIS, SDL_AudioSpec *spec);
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static void OBSD_PlayAudio(_THIS);
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static Uint8 *OBSD_GetAudioBuf(_THIS);
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static void OBSD_CloseAudio(_THIS);
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#ifdef DEBUG_AUDIO
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static void OBSD_Status(_THIS);
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#endif
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/* Audio driver bootstrap functions */
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static int
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Audio_Available(void)
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{
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    int fd;
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    int available;
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    available = 0;
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    fd = SDL_OpenAudioPath(NULL, 0, OPEN_FLAGS, 0);
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    if(fd >= 0) {
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	available = 1;
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	close(fd);
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    }
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    return(available);
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}
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static void
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Audio_DeleteDevice(SDL_AudioDevice *device)
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{
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    free(device->hidden);
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    free(device);
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}
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static SDL_AudioDevice
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*Audio_CreateDevice(int devindex)
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{
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    SDL_AudioDevice *this;
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    /* Initialize all variables that we clean on shutdown */
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    this = (SDL_AudioDevice*)malloc(sizeof(SDL_AudioDevice));
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    if(this) {
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	memset(this, 0, (sizeof *this));
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	this->hidden =
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	    (struct SDL_PrivateAudioData*)malloc((sizeof *this->hidden));
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    }
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    if((this == NULL) || (this->hidden == NULL)) {
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	SDL_OutOfMemory();
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	if(this) free(this);
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	return(0);
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    }
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    memset(this->hidden, 0, (sizeof *this->hidden));
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    audio_fd = -1;
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    /* Set the function pointers */
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    this->OpenAudio = OBSD_OpenAudio;
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    this->WaitAudio = OBSD_WaitAudio;
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    this->PlayAudio = OBSD_PlayAudio;
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    this->GetAudioBuf = OBSD_GetAudioBuf;
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    this->CloseAudio = OBSD_CloseAudio;
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    this->free = Audio_DeleteDevice;
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    return this;
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}
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AudioBootStrap OBSD_bootstrap = {
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	OBSD_DRIVER_NAME, "Native OpenBSD audio",
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	Audio_Available, Audio_CreateDevice
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};
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/* This function waits until it is possible to write a full sound buffer */
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static void
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OBSD_WaitAudio(_THIS)
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{
94
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	/* Check to see if the thread-parent process is still alive */
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	{ static int cnt = 0;
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		/* Note that this only works with thread implementations 
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		   that use a different process id for each thread.
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		*/
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		if (parent && (((++cnt)%10) == 0)) { /* Check every 10 loops */
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			if ( kill(parent, 0) < 0 ) {
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				this->enabled = 0;
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			}
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		}
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	}
37
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94
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#ifndef USE_BLOCKING_WRITES /* Not necessary when using blocking writes */
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	/* See if we need to use timed audio synchronization */
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	if ( frame_ticks ) {
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		/* Use timer for general audio synchronization */
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		Sint32 ticks;
37
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		ticks = ((Sint32)(next_frame - SDL_GetTicks()))-FUDGE_TICKS;
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		if ( ticks > 0 ) {
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			SDL_Delay(ticks);
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		}
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	} else {
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		/* Use select() for audio synchronization */
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		fd_set fdset;
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		struct timeval timeout;
37
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		FD_ZERO(&fdset);
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		FD_SET(audio_fd, &fdset);
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		timeout.tv_sec = 10;
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		timeout.tv_usec = 0;
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#ifdef DEBUG_AUDIO
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		fprintf(stderr, "Waiting for audio to get ready\n");
37
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#endif
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		if ( select(audio_fd+1, NULL, &fdset, NULL, &timeout) <= 0 ) {
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			const char *message =
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			"Audio timeout - buggy audio driver? (disabled)";
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			/* In general we should never print to the screen,
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			   but in this case we have no other way of letting
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			   the user know what happened.
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			*/
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			fprintf(stderr, "SDL: %s\n", message);
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			this->enabled = 0;
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			/* Don't try to close - may hang */
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			audio_fd = -1;
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#ifdef DEBUG_AUDIO
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			fprintf(stderr, "Done disabling audio\n");
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#endif
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		}
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#ifdef DEBUG_AUDIO
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		fprintf(stderr, "Ready!\n");
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#endif
37
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	}
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#endif /* !USE_BLOCKING_WRITES */
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}
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static void
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OBSD_PlayAudio(_THIS)
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{
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	int written, p=0;
37
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	/* Write the audio data, checking for EAGAIN on broken audio drivers */
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	do {
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		written = write(audio_fd, &mixbuf[p], mixlen-p);
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		if (written>0)
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		   p += written;
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		if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR)
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		{
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		   /* Non recoverable error has occurred. It should be reported!!! */
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		   perror("audio");
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		   break;
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		}
37
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		if ( p < written || ((written < 0) && ((errno == 0) || (errno == EAGAIN))) ) {
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			SDL_Delay(1);	/* Let a little CPU time go by */
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		}
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	} while ( p < written );
37
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	/* If timer synchronization is enabled, set the next write frame */
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	if ( frame_ticks ) {
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		next_frame += frame_ticks;
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	}
37
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	/* If we couldn't write, assume fatal error for now */
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	if ( written < 0 ) {
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		this->enabled = 0;
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	}
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#ifdef DEBUG_AUDIO
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	fprintf(stderr, "Wrote %d bytes of audio data\n", written);
37
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#endif
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}
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static Uint8
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*OBSD_GetAudioBuf(_THIS)
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{
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    return(mixbuf);
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}
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static void
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OBSD_CloseAudio(_THIS)
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{
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    if(mixbuf != NULL) {
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	SDL_FreeAudioMem(mixbuf);
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	mixbuf = NULL;
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    }
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    if(audio_fd >= 0) {
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	close(audio_fd);
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	audio_fd = -1;
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    }
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}
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#ifdef DEBUG_AUDIO
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void
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OBSD_Status(_THIS)
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{
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    audio_info_t info;
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    if(ioctl(audio_fd, AUDIO_GETINFO, &info) < 0) {
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parents:
diff changeset
   261
	fprintf(stderr,"AUDIO_GETINFO failed.\n");
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parents:
diff changeset
   262
	return;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   263
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   264
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   265
    fprintf(stderr,"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   266
[play/record info]
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   267
buffer size	:   %d bytes
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   268
sample rate	:   %i Hz
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   269
channels	:   %i
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parents:
diff changeset
   270
precision	:   %i-bit
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parents:
diff changeset
   271
encoding	:   0x%x
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   272
seek		:   %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   273
sample count	:   %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   274
EOF count	:   %i
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Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   275
paused		:   %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   276
error occured	:   %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   277
waiting		:   %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   278
active		:   %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   279
",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   280
    info.play.buffer_size,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   281
    info.play.sample_rate,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   282
    info.play.channels,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   283
    info.play.precision,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   284
    info.play.encoding,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   285
    info.play.seek,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   286
    info.play.samples,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   287
    info.play.eof,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   288
    info.play.pause ? "yes" : "no",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   289
    info.play.error ? "yes" : "no",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   290
    info.play.waiting ? "yes" : "no",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   291
    info.play.active ? "yes": "no");
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   292
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   293
    fprintf(stderr,"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   294
[audio info]
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   295
monitor_gain	:   %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   296
hw block size	:   %d bytes
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   297
hi watermark	:   %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   298
lo watermark	:   %i
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   299
audio mode	:   %s
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   300
",  
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   301
    info.monitor_gain,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   302
    info.blocksize,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   303
    info.hiwat, info.lowat,
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   304
    (info.mode == AUMODE_PLAY) ? "PLAY"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   305
    : (info.mode = AUMODE_RECORD) ? "RECORD"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   306
    : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL"
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   307
    : "???"));
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   308
}
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   309
#endif /* DEBUG_AUDIO */
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parents:
diff changeset
   310
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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diff changeset
   311
static int
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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diff changeset
   312
OBSD_OpenAudio(_THIS, SDL_AudioSpec *spec)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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diff changeset
   313
{
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   314
    char audiodev[64];
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   315
    Uint16 setenc;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   316
    audio_encoding_t enc;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   317
    audio_info_t info;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   318
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   319
    AUDIO_INITINFO(&info);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
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parents:
diff changeset
   320
    
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   321
    /* Calculate the final parameters for this audio specification */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   322
    SDL_CalculateAudioSpec(spec);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   323
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   324
#ifdef USE_TIMER_SYNC
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parents:
diff changeset
   325
    frame_ticks = 0.0;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   326
#endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   327
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   328
    /* Open the audio device */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   329
    audio_fd = SDL_OpenAudioPath(audiodev, sizeof(audiodev), OPEN_FLAGS, 0);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   330
    if(audio_fd < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   331
	SDL_SetError("Couldn't open %s: %s", audiodev, strerror(errno));
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   332
	return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   333
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   334
    
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   335
    /* Set to play mode */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   336
    info.mode = AUMODE_PLAY;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   337
    if(ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   338
	SDL_SetError("Couldn't put device into play mode");
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   339
	return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   340
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   341
    
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   342
    mixbuf = NULL;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   343
    setenc = 0;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   344
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   345
    for(enc.index = 0; (ioctl(audio_fd, AUDIO_GETENC, &enc)>=0)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   346
	&& (enc.encoding != setenc); enc.index++)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   347
    {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   348
	switch(spec->format)
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   349
	{
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   350
	    case AUDIO_U8:	/* 8-bit unsigned linear */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   351
		setenc = AUDIO_ENCODING_PCM8;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   352
		break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   353
	    case AUDIO_S8:	/* 8-bit signed linear */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   354
		setenc = AUDIO_ENCODING_SLINEAR;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   355
		break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   356
	    case AUDIO_U16LSB:  /* 16-bit unsigned linear, LSB */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   357
		setenc = AUDIO_ENCODING_ULINEAR_LE;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   358
		break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   359
	    case AUDIO_U16MSB:  /* 16-bit unsigned linear, MSB */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   360
		setenc = AUDIO_ENCODING_ULINEAR_BE;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   361
		break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   362
	    case AUDIO_S16LSB:  /* 16-bit signed linear, LSB */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   363
		setenc = AUDIO_ENCODING_SLINEAR_LE;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   364
		break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   365
	    case AUDIO_S16MSB:  /* 16-bit signed linear, MSB */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   366
		setenc = AUDIO_ENCODING_SLINEAR_BE;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   367
		break;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   368
	}
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   369
#ifdef DEBUG_AUDIO
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   370
	fprintf(stderr,"encoding #%i: \"%s\" %i-bit (0x%x) flags=%i...\n",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   371
	    enc.index, enc.name, enc.precision, enc.encoding, enc.flags);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   372
#endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   373
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   374
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   375
    if(!setenc) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   376
	SDL_SetError("No supported encoding for 0x%x", spec->format);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   377
	return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   378
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   379
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   380
    /* Set audio encoding */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   381
    info.play.encoding = enc.encoding;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   382
    info.play.precision = enc.precision;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   383
    if((ioctl(audio_fd, AUDIO_SETINFO, &info) < 0)) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   384
	SDL_SetError("Couldn't set encoding to 0x%x %i-bit",
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   385
	    enc.encoding, enc.precision);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   386
	return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   387
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   388
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   389
    /* Set audio channels */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   390
    info.play.channels = spec->channels;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   391
    if(ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   392
	info.play.channels = (spec->channels > 1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   393
	ioctl(audio_fd, AUDIO_SETINFO, &info);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   394
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   395
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   396
    /* Set the sample rate */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   397
    info.play.sample_rate = spec->freq;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   398
    if(ioctl(audio_fd, AUDIO_SETINFO, &info) < 0) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   399
	SDL_SetError("Couldn't set sample rate to %i Hz", spec->freq);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   400
	return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   401
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   402
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   403
    /* Allocate mixing buffer */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   404
    mixlen = spec->size;
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   405
    mixbuf = (Uint8*)SDL_AllocAudioMem(mixlen);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   406
    if(mixbuf == NULL) {
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   407
	return(-1);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   408
    }
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   409
    memset(mixbuf, spec->silence, spec->size);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   410
    
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   411
    /* Get the parent process id (we're the parent of the audio thread) */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   412
    parent = getpid();
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   413
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   414
#ifdef DEBUG_AUDIO
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   415
    OBSD_Status(this);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   416
#endif
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   417
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   418
    /* We're ready to rock and roll. :-) */
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   419
    return(0);
3ad7157c6cfa Added native OpenBSD audio driver (thanks vedge!)
Sam Lantinga <slouken@lokigames.com>
parents:
diff changeset
   420
}