src/audio/bsd/SDL_bsdaudio.c
author Ryan C. Gordon <icculus@icculus.org>
Thu, 01 Jan 2009 07:54:58 +0000
changeset 2938 2929ed239d2a
parent 2859 99210400e8b9
child 3697 f7b03b6838cb
permissions -rw-r--r--
Adjusted default choice of audio driver. If a driver can definitely see available devices, it is chosen. Otherwise, we'll take the first driver that initializes but saw no devices...this might be because it can't enumerate them, or there really aren't any available. This prevents the dsp driver from hogging control when there are no /dev/dsp* nodes (for example, on a Linux box with ALSA and no OSS emulation).
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/*
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    SDL - Simple DirectMedia Layer
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    Copyright (C) 1997-2009 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@libsdl.org
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*/
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#include "SDL_config.h"
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/*
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 * Driver for native OpenBSD/NetBSD audio(4).
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 * vedge@vedge.com.ar.
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 */
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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 <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_timer.h"
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#include "SDL_audio.h"
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#include "../SDL_audiomem.h"
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#include "../SDL_audio_c.h"
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#include "../SDL_audiodev_c.h"
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#include "SDL_bsdaudio.h"
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/* The tag name used by NetBSD/OpenBSD audio */
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#ifdef __NetBSD__
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#define BSD_AUDIO_DRIVER_NAME         "netbsd"
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#define BSD_AUDIO_DRIVER_DESC         "Native NetBSD audio"
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#else
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#define BSD_AUDIO_DRIVER_NAME         "openbsd"
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#define BSD_AUDIO_DRIVER_DESC         "Native OpenBSD audio"
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#endif
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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_OUTPUT O_WRONLY
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#define OPEN_FLAGS_INPUT O_RDONLY
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#else
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#define OPEN_FLAGS_OUTPUT (O_WRONLY|O_NONBLOCK)
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#define OPEN_FLAGS_INPUT (O_RDONLY|O_NONBLOCK)
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#endif
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/* !!! FIXME: so much cut and paste with dsp/dma drivers... */
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static char **outputDevices = NULL;
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static int outputDeviceCount = 0;
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static char **inputDevices = NULL;
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static int inputDeviceCount = 0;
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static inline void
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free_device_list(char ***devs, int *count)
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{
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    SDL_FreeUnixAudioDevices(devs, count);
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}
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static inline void
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build_device_list(int iscapture, char ***devs, int *count)
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{
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    const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
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    free_device_list(devs, count);
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    SDL_EnumUnixAudioDevices(flags, 0, NULL, devs, count);
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}
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static inline void
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build_device_lists(void)
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{
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    build_device_list(0, &outputDevices, &outputDeviceCount);
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    build_device_list(1, &inputDevices, &inputDeviceCount);
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}
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static inline void
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free_device_lists(void)
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{
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    free_device_list(&outputDevices, &outputDeviceCount);
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    free_device_list(&inputDevices, &inputDeviceCount);
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}
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static void
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BSDAUDIO_Deinitialize(void)
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{
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    free_device_lists();
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}
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static int
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BSDAUDIO_DetectDevices(int iscapture)
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{
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    if (iscapture) {
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        build_device_list(1, &inputDevices, &inputDeviceCount);
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        return inputDeviceCount;
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    } else {
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        build_device_list(0, &outputDevices, &outputDeviceCount);
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        return outputDeviceCount;
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    }
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    return 0;                   /* shouldn't ever hit this. */
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}
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static const char *
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BSDAUDIO_GetDeviceName(int index, int iscapture)
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{
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    if ((iscapture) && (index < inputDeviceCount)) {
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        return inputDevices[index];
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   133
    } else if ((!iscapture) && (index < outputDeviceCount)) {
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        return outputDevices[index];
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   135
    }
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    SDL_SetError("No such device");
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    return NULL;
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}
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static void
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BSDAUDIO_Status(_THIS)
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{
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#ifdef DEBUG_AUDIO
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    /* *INDENT-OFF* */
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    audio_info_t info;
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    if (ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info) < 0) {
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        fprintf(stderr, "AUDIO_GETINFO failed.\n");
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        return;
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    }
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    fprintf(stderr, "\n"
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            "[play/record info]\n"
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            "buffer size	:   %d bytes\n"
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            "sample rate	:   %i Hz\n"
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            "channels	:   %i\n"
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            "precision	:   %i-bit\n"
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            "encoding	:   0x%x\n"
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            "seek		:   %i\n"
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            "sample count	:   %i\n"
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            "EOF count	:   %i\n"
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            "paused		:   %s\n"
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            "error occured	:   %s\n"
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            "waiting		:   %s\n"
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            "active		:   %s\n"
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            "",
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            info.play.buffer_size,
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            info.play.sample_rate,
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            info.play.channels,
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   171
            info.play.precision,
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   172
            info.play.encoding,
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   173
            info.play.seek,
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   174
            info.play.samples,
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   175
            info.play.eof,
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   176
            info.play.pause ? "yes" : "no",
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            info.play.error ? "yes" : "no",
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            info.play.waiting ? "yes" : "no",
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            info.play.active ? "yes" : "no");
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    fprintf(stderr, "\n"
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            "[audio info]\n"
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            "monitor_gain	:   %i\n"
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            "hw block size	:   %d bytes\n"
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   185
            "hi watermark	:   %i\n"
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   186
            "lo watermark	:   %i\n"
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            "audio mode	:   %s\n"
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            "",
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   189
            info.monitor_gain,
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   190
            info.blocksize,
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   191
            info.hiwat, info.lowat,
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            (info.mode == AUMODE_PLAY) ? "PLAY"
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   193
            : (info.mode = AUMODE_RECORD) ? "RECORD"
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   194
            : (info.mode == AUMODE_PLAY_ALL ? "PLAY_ALL" : "?"));
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    /* *INDENT-ON* */
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   196
#endif /* DEBUG_AUDIO */
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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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   202
BSDAUDIO_WaitDevice(_THIS)
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   203
{
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   204
#ifndef USE_BLOCKING_WRITES     /* Not necessary when using blocking writes */
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   205
    /* See if we need to use timed audio synchronization */
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   206
    if (this->hidden->frame_ticks) {
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   207
        /* Use timer for general audio synchronization */
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   208
        Sint32 ticks;
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        ticks =
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            ((Sint32) (this->hidden->next_frame - SDL_GetTicks())) -
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   212
            FUDGE_TICKS;
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   213
        if (ticks > 0) {
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            SDL_Delay(ticks);
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   215
        }
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   216
    } else {
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   217
        /* Use select() for audio synchronization */
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   218
        fd_set fdset;
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   219
        struct timeval timeout;
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   220
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   221
        FD_ZERO(&fdset);
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   222
        FD_SET(this->hidden->audio_fd, &fdset);
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   223
        timeout.tv_sec = 10;
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   224
        timeout.tv_usec = 0;
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   225
#ifdef DEBUG_AUDIO
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   226
        fprintf(stderr, "Waiting for audio to get ready\n");
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   227
#endif
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        if (select(this->hidden->audio_fd + 1, NULL, &fdset, NULL, &timeout)
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            <= 0) {
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   230
            const char *message =
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   231
                "Audio timeout - buggy audio driver? (disabled)";
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   232
            /* In general we should never print to the screen,
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   233
               but in this case we have no other way of letting
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   234
               the user know what happened.
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   235
             */
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   236
            fprintf(stderr, "SDL: %s\n", message);
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   237
            this->enabled = 0;
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   238
            /* Don't try to close - may hang */
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   239
            this->hidden->audio_fd = -1;
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   240
#ifdef DEBUG_AUDIO
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   241
            fprintf(stderr, "Done disabling audio\n");
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   242
#endif
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   243
        }
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   244
#ifdef DEBUG_AUDIO
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   245
        fprintf(stderr, "Ready!\n");
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   246
#endif
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   247
    }
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   248
#endif /* !USE_BLOCKING_WRITES */
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   249
}
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   250
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   251
static void
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   252
BSDAUDIO_PlayDevice(_THIS)
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   253
{
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   254
    int written, p = 0;
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   255
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   256
    /* Write the audio data, checking for EAGAIN on broken audio drivers */
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diff changeset
   257
    do {
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   258
        written = write(this->hidden->audio_fd,
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   259
                        &this->hidden->mixbuf[p], this->hidden->mixlen - p);
2049
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   260
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   261
        if (written > 0)
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   262
            p += written;
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   263
        if (written == -1 && errno != 0 && errno != EAGAIN && errno != EINTR) {
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diff changeset
   264
            /* Non recoverable error has occurred. It should be reported!!! */
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   265
            perror("audio");
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   266
            break;
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   267
        }
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   268
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   269
        if (p < written
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   270
            || ((written < 0) && ((errno == 0) || (errno == EAGAIN)))) {
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   271
            SDL_Delay(1);       /* Let a little CPU time go by */
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   272
        }
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   273
    } while (p < written);
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   274
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   275
    /* If timer synchronization is enabled, set the next write frame */
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   276
    if (this->hidden->frame_ticks) {
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   277
        this->hidden->next_frame += this->hidden->frame_ticks;
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   278
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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   279
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   280
    /* If we couldn't write, assume fatal error for now */
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   281
    if (written < 0) {
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   282
        this->enabled = 0;
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   283
    }
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   284
#ifdef DEBUG_AUDIO
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   285
    fprintf(stderr, "Wrote %d bytes of audio data\n", written);
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   286
#endif
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   287
}
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   288
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   289
static Uint8 *
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   290
BSDAUDIO_GetDeviceBuf(_THIS)
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   291
{
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   292
    return (this->hidden->mixbuf);
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diff changeset
   293
}
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   294
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   295
static void
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   296
BSDAUDIO_CloseDevice(_THIS)
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   297
{
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   298
    if (this->hidden != NULL) {
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diff changeset
   299
        if (this->hidden->mixbuf != NULL) {
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   300
            SDL_FreeAudioMem(this->hidden->mixbuf);
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diff changeset
   301
            this->hidden->mixbuf = NULL;
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diff changeset
   302
        }
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diff changeset
   303
        if (this->hidden->audio_fd >= 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   304
            close(this->hidden->audio_fd);
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diff changeset
   305
            this->hidden->audio_fd = -1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   306
        }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   307
        SDL_free(this->hidden);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   308
        this->hidden = NULL;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   309
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   310
}
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12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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parents:
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   311
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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diff changeset
   312
static int
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   313
BSDAUDIO_OpenDevice(_THIS, const char *devname, int iscapture)
1567
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parents:
diff changeset
   314
{
2049
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diff changeset
   315
    const int flags = ((iscapture) ? OPEN_FLAGS_INPUT : OPEN_FLAGS_OUTPUT);
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diff changeset
   316
    SDL_AudioFormat format = 0;
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parents:
diff changeset
   317
    audio_info_t info;
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parents:
diff changeset
   318
2049
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diff changeset
   319
    /* We don't care what the devname is...we'll try to open anything. */
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diff changeset
   320
    /*  ...but default to first name in the list... */
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diff changeset
   321
    if (devname == NULL) {
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diff changeset
   322
        if (((iscapture) && (inputDeviceCount == 0)) ||
866052b01ee5 indent is evil
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diff changeset
   323
            ((!iscapture) && (outputDeviceCount == 0))) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   324
            SDL_SetError("No such audio device");
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   325
            return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   326
        }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   327
        devname = ((iscapture) ? inputDevices[0] : outputDevices[0]);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   328
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   329
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   330
    /* Initialize all variables that we clean on shutdown */
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diff changeset
   331
    this->hidden = (struct SDL_PrivateAudioData *)
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diff changeset
   332
        SDL_malloc((sizeof *this->hidden));
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   333
    if (this->hidden == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   334
        SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   335
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   336
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   337
    SDL_memset(this->hidden, 0, (sizeof *this->hidden));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   338
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   339
    /* Open the audio device */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   340
    this->hidden->audio_fd = open(devname, flags, 0);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   341
    if (this->hidden->audio_fd < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   342
        SDL_SetError("Couldn't open %s: %s", devname, strerror(errno));
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   343
        return 0;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   344
    }
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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diff changeset
   345
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12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff changeset
   346
    AUDIO_INITINFO(&info);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1583
diff changeset
   347
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12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff changeset
   348
    /* Calculate the final parameters for this audio specification */
2049
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diff changeset
   349
    SDL_CalculateAudioSpec(&this->spec);
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
   350
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12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff changeset
   351
    /* Set to play mode */
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
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parents:
diff changeset
   352
    info.mode = AUMODE_PLAY;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   353
    if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) < 0) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
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parents: 1982
diff changeset
   354
        BSDAUDIO_CloseDevice(this);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   355
        SDL_SetError("Couldn't put device into play mode");
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   356
        return 0;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   357
    }
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   358
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   359
    AUDIO_INITINFO(&info);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   360
    for (format = SDL_FirstAudioFormat(this->spec.format);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   361
         format; format = SDL_NextAudioFormat()) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   362
        switch (format) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   363
        case AUDIO_U8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   364
            info.play.encoding = AUDIO_ENCODING_ULINEAR;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   365
            info.play.precision = 8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   366
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   367
        case AUDIO_S8:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   368
            info.play.encoding = AUDIO_ENCODING_SLINEAR;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   369
            info.play.precision = 8;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   370
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   371
        case AUDIO_S16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   372
            info.play.encoding = AUDIO_ENCODING_SLINEAR_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   373
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   374
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   375
        case AUDIO_S16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   376
            info.play.encoding = AUDIO_ENCODING_SLINEAR_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   377
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   378
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   379
        case AUDIO_U16LSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   380
            info.play.encoding = AUDIO_ENCODING_ULINEAR_LE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   381
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   382
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   383
        case AUDIO_U16MSB:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   384
            info.play.encoding = AUDIO_ENCODING_ULINEAR_BE;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   385
            info.play.precision = 16;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   386
            break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   387
        default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   388
            continue;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   389
        }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   390
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   391
        if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == 0) {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   392
            break;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   393
        }
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   394
    }
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   395
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   396
    if (!format) {
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   397
        BSDAUDIO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   398
        SDL_SetError("No supported encoding for 0x%x", this->spec.format);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   399
        return 0;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   400
    }
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   401
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   402
    this->spec.format = format;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   403
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   404
    AUDIO_INITINFO(&info);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   405
    info.play.channels = this->spec.channels;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   406
    if (ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info) == -1) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   407
        this->spec.channels = 1;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   408
    }
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   409
    AUDIO_INITINFO(&info);
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   410
    info.play.sample_rate = this->spec.freq;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   411
    info.blocksize = this->spec.size;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   412
    info.hiwat = 5;
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   413
    info.lowat = 3;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   414
    (void) ioctl(this->hidden->audio_fd, AUDIO_SETINFO, &info);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   415
    (void) ioctl(this->hidden->audio_fd, AUDIO_GETINFO, &info);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   416
    this->spec.freq = info.play.sample_rate;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   417
    /* Allocate mixing buffer */
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   418
    this->hidden->mixlen = this->spec.size;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   419
    this->hidden->mixbuf = (Uint8 *) SDL_AllocAudioMem(this->hidden->mixlen);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   420
    if (this->hidden->mixbuf == NULL) {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   421
        BSDAUDIO_CloseDevice(this);
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   422
        SDL_OutOfMemory();
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   423
        return 0;
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   424
    }
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   425
    SDL_memset(this->hidden->mixbuf, this->spec.silence, this->spec.size);
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   426
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   427
    BSDAUDIO_Status(this);
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   428
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   429
    /* We're ready to rock and roll. :-) */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   430
    return (0);
1567
12b6d331d82a Good idea, renaming OpenBSD audio to BSD audio.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
   431
}
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   432
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   433
static int
2060
866052b01ee5 indent is evil
Sam Lantinga <slouken@libsdl.org>
parents: 2049
diff changeset
   434
BSDAUDIO_Init(SDL_AudioDriverImpl * impl)
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   435
{
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   436
    /* Set the function pointers */
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   437
    impl->DetectDevices = BSDAUDIO_DetectDevices;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   438
    impl->GetDeviceName = BSDAUDIO_GetDeviceName;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   439
    impl->OpenDevice = BSDAUDIO_OpenDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   440
    impl->PlayDevice = BSDAUDIO_PlayDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   441
    impl->WaitDevice = BSDAUDIO_WaitDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   442
    impl->GetDeviceBuf = BSDAUDIO_GetDeviceBuf;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   443
    impl->CloseDevice = BSDAUDIO_CloseDevice;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   444
    impl->Deinitialize = BSDAUDIO_Deinitialize;
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   445
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   446
    build_device_lists();
2938
2929ed239d2a Adjusted default choice of audio driver.
Ryan C. Gordon <icculus@icculus.org>
parents: 2859
diff changeset
   447
    return (outputDeviceCount > 0) ? 2 : 1;
2049
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   448
}
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   449
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   450
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   451
AudioBootStrap BSD_AUDIO_bootstrap = {
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   452
    BSD_AUDIO_DRIVER_NAME, BSD_AUDIO_DRIVER_DESC, BSDAUDIO_Init, 0
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   453
};
5f6550e5184f Merged SDL-ryan-multiple-audio-device branch r2803:2871 into the trunk.
Ryan C. Gordon <icculus@icculus.org>
parents: 1982
diff changeset
   454
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1583
diff changeset
   455
/* vi: set ts=4 sw=4 expandtab: */