1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/Alc/backends/oss.c	Tue Oct 25 13:02:31 2011 -0700
     1.3 @@ -0,0 +1,536 @@
     1.4 +/**
     1.5 + * OpenAL cross platform audio library
     1.6 + * Copyright (C) 1999-2007 by authors.
     1.7 + * This library is free software; you can redistribute it and/or
     1.8 + *  modify it under the terms of the GNU Library General Public
     1.9 + *  License as published by the Free Software Foundation; either
    1.10 + *  version 2 of the License, or (at your option) any later version.
    1.11 + *
    1.12 + * This library is distributed in the hope that it will be useful,
    1.13 + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
    1.14 + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    1.15 + *  Library General Public License for more details.
    1.16 + *
    1.17 + * You should have received a copy of the GNU Library General Public
    1.18 + *  License along with this library; if not, write to the
    1.19 + *  Free Software Foundation, Inc., 59 Temple Place - Suite 330,
    1.20 + *  Boston, MA  02111-1307, USA.
    1.21 + * Or go to http://www.gnu.org/copyleft/lgpl.html
    1.22 + */
    1.23 +
    1.24 +#include "config.h"
    1.25 +
    1.26 +#include <sys/ioctl.h>
    1.27 +#include <sys/types.h>
    1.28 +#include <sys/stat.h>
    1.29 +#include <fcntl.h>
    1.30 +#include <stdlib.h>
    1.31 +#include <stdio.h>
    1.32 +#include <memory.h>
    1.33 +#include <unistd.h>
    1.34 +#include <errno.h>
    1.35 +#include <math.h>
    1.36 +#include "alMain.h"
    1.37 +#include "AL/al.h"
    1.38 +#include "AL/alc.h"
    1.39 +
    1.40 +#include <sys/soundcard.h>
    1.41 +
    1.42 +/*
    1.43 + * The OSS documentation talks about SOUND_MIXER_READ, but the header
    1.44 + * only contains MIXER_READ. Play safe. Same for WRITE.
    1.45 + */
    1.46 +#ifndef SOUND_MIXER_READ
    1.47 +#define SOUND_MIXER_READ MIXER_READ
    1.48 +#endif
    1.49 +#ifndef SOUND_MIXER_WRITE
    1.50 +#define SOUND_MIXER_WRITE MIXER_WRITE
    1.51 +#endif
    1.52 +
    1.53 +static const ALCchar oss_device[] = "OSS Default";
    1.54 +
    1.55 +typedef struct {
    1.56 +    int fd;
    1.57 +    volatile int killNow;
    1.58 +    ALvoid *thread;
    1.59 +
    1.60 +    ALubyte *mix_data;
    1.61 +    int data_size;
    1.62 +
    1.63 +    RingBuffer *ring;
    1.64 +    int doCapture;
    1.65 +} oss_data;
    1.66 +
    1.67 +
    1.68 +static int log2i(ALCuint x)
    1.69 +{
    1.70 +    int y = 0;
    1.71 +    while (x > 1)
    1.72 +    {
    1.73 +        x >>= 1;
    1.74 +        y++;
    1.75 +    }
    1.76 +    return y;
    1.77 +}
    1.78 +
    1.79 +
    1.80 +static ALuint OSSProc(ALvoid *ptr)
    1.81 +{
    1.82 +    ALCdevice *pDevice = (ALCdevice*)ptr;
    1.83 +    oss_data *data = (oss_data*)pDevice->ExtraData;
    1.84 +    ALint frameSize;
    1.85 +    ssize_t wrote;
    1.86 +
    1.87 +    SetRTPriority();
    1.88 +
    1.89 +    frameSize = FrameSizeFromDevFmt(pDevice->FmtChans, pDevice->FmtType);
    1.90 +
    1.91 +    while(!data->killNow && pDevice->Connected)
    1.92 +    {
    1.93 +        ALint len = data->data_size;
    1.94 +        ALubyte *WritePtr = data->mix_data;
    1.95 +
    1.96 +        aluMixData(pDevice, WritePtr, len/frameSize);
    1.97 +        while(len > 0 && !data->killNow)
    1.98 +        {
    1.99 +            wrote = write(data->fd, WritePtr, len);
   1.100 +            if(wrote < 0)
   1.101 +            {
   1.102 +                if(errno != EAGAIN && errno != EWOULDBLOCK && errno != EINTR)
   1.103 +                {
   1.104 +                    ERR("write failed: %s\n", strerror(errno));
   1.105 +                    aluHandleDisconnect(pDevice);
   1.106 +                    break;
   1.107 +                }
   1.108 +
   1.109 +                Sleep(1);
   1.110 +                continue;
   1.111 +            }
   1.112 +
   1.113 +            len -= wrote;
   1.114 +            WritePtr += wrote;
   1.115 +        }
   1.116 +    }
   1.117 +
   1.118 +    return 0;
   1.119 +}
   1.120 +
   1.121 +static ALuint OSSCaptureProc(ALvoid *ptr)
   1.122 +{
   1.123 +    ALCdevice *pDevice = (ALCdevice*)ptr;
   1.124 +    oss_data *data = (oss_data*)pDevice->ExtraData;
   1.125 +    int frameSize;
   1.126 +    int amt;
   1.127 +
   1.128 +    SetRTPriority();
   1.129 +
   1.130 +    frameSize = FrameSizeFromDevFmt(pDevice->FmtChans, pDevice->FmtType);
   1.131 +
   1.132 +    while(!data->killNow)
   1.133 +    {
   1.134 +        amt = read(data->fd, data->mix_data, data->data_size);
   1.135 +        if(amt < 0)
   1.136 +        {
   1.137 +            ERR("read failed: %s\n", strerror(errno));
   1.138 +            aluHandleDisconnect(pDevice);
   1.139 +            break;
   1.140 +        }
   1.141 +        if(amt == 0)
   1.142 +        {
   1.143 +            Sleep(1);
   1.144 +            continue;
   1.145 +        }
   1.146 +        if(data->doCapture)
   1.147 +            WriteRingBuffer(data->ring, data->mix_data, amt/frameSize);
   1.148 +    }
   1.149 +
   1.150 +    return 0;
   1.151 +}
   1.152 +
   1.153 +static ALCboolean oss_open_playback(ALCdevice *device, const ALCchar *deviceName)
   1.154 +{
   1.155 +    char driver[64];
   1.156 +    oss_data *data;
   1.157 +
   1.158 +    strncpy(driver, GetConfigValue("oss", "device", "/dev/dsp"), sizeof(driver)-1);
   1.159 +    driver[sizeof(driver)-1] = 0;
   1.160 +    if(!deviceName)
   1.161 +        deviceName = oss_device;
   1.162 +    else if(strcmp(deviceName, oss_device) != 0)
   1.163 +        return ALC_FALSE;
   1.164 +
   1.165 +    data = (oss_data*)calloc(1, sizeof(oss_data));
   1.166 +    data->killNow = 0;
   1.167 +
   1.168 +    data->fd = open(driver, O_WRONLY);
   1.169 +    if(data->fd == -1)
   1.170 +    {
   1.171 +        free(data);
   1.172 +        ERR("Could not open %s: %s\n", driver, strerror(errno));
   1.173 +        return ALC_FALSE;
   1.174 +    }
   1.175 +
   1.176 +    device->szDeviceName = strdup(deviceName);
   1.177 +    device->ExtraData = data;
   1.178 +    return ALC_TRUE;
   1.179 +}
   1.180 +
   1.181 +static void oss_close_playback(ALCdevice *device)
   1.182 +{
   1.183 +    oss_data *data = (oss_data*)device->ExtraData;
   1.184 +
   1.185 +    close(data->fd);
   1.186 +    free(data);
   1.187 +    device->ExtraData = NULL;
   1.188 +}
   1.189 +
   1.190 +static ALCboolean oss_reset_playback(ALCdevice *device)
   1.191 +{
   1.192 +    oss_data *data = (oss_data*)device->ExtraData;
   1.193 +    int numFragmentsLogSize;
   1.194 +    int log2FragmentSize;
   1.195 +    unsigned int periods;
   1.196 +    audio_buf_info info;
   1.197 +    ALuint frameSize;
   1.198 +    int numChannels;
   1.199 +    int ossFormat;
   1.200 +    int ossSpeed;
   1.201 +    char *err;
   1.202 +
   1.203 +    switch(device->FmtType)
   1.204 +    {
   1.205 +        case DevFmtByte:
   1.206 +            ossFormat = AFMT_S8;
   1.207 +            break;
   1.208 +        case DevFmtUByte:
   1.209 +            ossFormat = AFMT_U8;
   1.210 +            break;
   1.211 +        case DevFmtUShort:
   1.212 +        case DevFmtFloat:
   1.213 +            device->FmtType = DevFmtShort;
   1.214 +            /* fall-through */
   1.215 +        case DevFmtShort:
   1.216 +            ossFormat = AFMT_S16_NE;
   1.217 +            break;
   1.218 +    }
   1.219 +
   1.220 +    periods = device->NumUpdates;
   1.221 +    numChannels = ChannelsFromDevFmt(device->FmtChans);
   1.222 +    frameSize = numChannels * BytesFromDevFmt(device->FmtType);
   1.223 +
   1.224 +    ossSpeed = device->Frequency;
   1.225 +    log2FragmentSize = log2i(device->UpdateSize * frameSize);
   1.226 +
   1.227 +    /* according to the OSS spec, 16 bytes are the minimum */
   1.228 +    if (log2FragmentSize < 4)
   1.229 +        log2FragmentSize = 4;
   1.230 +    /* Subtract one period since the temp mixing buffer counts as one. Still
   1.231 +     * need at least two on the card, though. */
   1.232 +    if(periods > 2) periods--;
   1.233 +    numFragmentsLogSize = (periods << 16) | log2FragmentSize;
   1.234 +
   1.235 +#define CHECKERR(func) if((func) < 0) {                                       \
   1.236 +    err = #func;                                                              \
   1.237 +    goto err;                                                                 \
   1.238 +}
   1.239 +    /* Don't fail if SETFRAGMENT fails. We can handle just about anything
   1.240 +     * that's reported back via GETOSPACE */
   1.241 +    ioctl(data->fd, SNDCTL_DSP_SETFRAGMENT, &numFragmentsLogSize);
   1.242 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_SETFMT, &ossFormat));
   1.243 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_CHANNELS, &numChannels));
   1.244 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_SPEED, &ossSpeed));
   1.245 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_GETOSPACE, &info));
   1.246 +    if(0)
   1.247 +    {
   1.248 +    err:
   1.249 +        ERR("%s failed: %s\n", err, strerror(errno));
   1.250 +        return ALC_FALSE;
   1.251 +    }
   1.252 +#undef CHECKERR
   1.253 +
   1.254 +    if((int)ChannelsFromDevFmt(device->FmtChans) != numChannels)
   1.255 +    {
   1.256 +        ERR("Failed to set %s, got %d channels instead\n", DevFmtChannelsString(device->FmtChans), numChannels);
   1.257 +        return ALC_FALSE;
   1.258 +    }
   1.259 +
   1.260 +    if(!((ossFormat == AFMT_S8 && device->FmtType == DevFmtByte) ||
   1.261 +         (ossFormat == AFMT_U8 && device->FmtType == DevFmtUByte) ||
   1.262 +         (ossFormat == AFMT_S16_NE && device->FmtType == DevFmtShort)))
   1.263 +    {
   1.264 +        ERR("Failed to set %s samples, got OSS format %#x\n", DevFmtTypeString(device->FmtType), ossFormat);
   1.265 +        return ALC_FALSE;
   1.266 +    }
   1.267 +
   1.268 +    if(device->Frequency != (ALuint)ossSpeed)
   1.269 +    {
   1.270 +        if((device->Flags&DEVICE_FREQUENCY_REQUEST))
   1.271 +            ERR("Failed to set %dhz, got %dhz instead\n", device->Frequency, ossSpeed);
   1.272 +        device->Flags &= ~DEVICE_FREQUENCY_REQUEST;
   1.273 +        device->Frequency = ossSpeed;
   1.274 +    }
   1.275 +    device->UpdateSize = info.fragsize / frameSize;
   1.276 +    device->NumUpdates = info.fragments + 1;
   1.277 +
   1.278 +    data->data_size = device->UpdateSize * frameSize;
   1.279 +    data->mix_data = calloc(1, data->data_size);
   1.280 +
   1.281 +    SetDefaultChannelOrder(device);
   1.282 +
   1.283 +    data->thread = StartThread(OSSProc, device);
   1.284 +    if(data->thread == NULL)
   1.285 +    {
   1.286 +        free(data->mix_data);
   1.287 +        data->mix_data = NULL;
   1.288 +        return ALC_FALSE;
   1.289 +    }
   1.290 +
   1.291 +    return ALC_TRUE;
   1.292 +}
   1.293 +
   1.294 +static void oss_stop_playback(ALCdevice *device)
   1.295 +{
   1.296 +    oss_data *data = (oss_data*)device->ExtraData;
   1.297 +
   1.298 +    if(!data->thread)
   1.299 +        return;
   1.300 +
   1.301 +    data->killNow = 1;
   1.302 +    StopThread(data->thread);
   1.303 +    data->thread = NULL;
   1.304 +
   1.305 +    data->killNow = 0;
   1.306 +    if(ioctl(data->fd, SNDCTL_DSP_RESET) != 0)
   1.307 +        ERR("Error resetting device: %s\n", strerror(errno));
   1.308 +
   1.309 +    free(data->mix_data);
   1.310 +    data->mix_data = NULL;
   1.311 +}
   1.312 +
   1.313 +
   1.314 +static ALCboolean oss_open_capture(ALCdevice *device, const ALCchar *deviceName)
   1.315 +{
   1.316 +    int numFragmentsLogSize;
   1.317 +    int log2FragmentSize;
   1.318 +    unsigned int periods;
   1.319 +    audio_buf_info info;
   1.320 +    ALuint frameSize;
   1.321 +    int numChannels;
   1.322 +    char driver[64];
   1.323 +    oss_data *data;
   1.324 +    int ossFormat;
   1.325 +    int ossSpeed;
   1.326 +    char *err;
   1.327 +
   1.328 +    strncpy(driver, GetConfigValue("oss", "capture", "/dev/dsp"), sizeof(driver)-1);
   1.329 +    driver[sizeof(driver)-1] = 0;
   1.330 +    if(!deviceName)
   1.331 +        deviceName = oss_device;
   1.332 +    else if(strcmp(deviceName, oss_device) != 0)
   1.333 +        return ALC_FALSE;
   1.334 +
   1.335 +    data = (oss_data*)calloc(1, sizeof(oss_data));
   1.336 +    data->killNow = 0;
   1.337 +
   1.338 +    data->fd = open(driver, O_RDONLY);
   1.339 +    if(data->fd == -1)
   1.340 +    {
   1.341 +        free(data);
   1.342 +        ERR("Could not open %s: %s\n", driver, strerror(errno));
   1.343 +        return ALC_FALSE;
   1.344 +    }
   1.345 +
   1.346 +    switch(device->FmtType)
   1.347 +    {
   1.348 +        case DevFmtByte:
   1.349 +            ossFormat = AFMT_S8;
   1.350 +            break;
   1.351 +        case DevFmtUByte:
   1.352 +            ossFormat = AFMT_U8;
   1.353 +            break;
   1.354 +        case DevFmtShort:
   1.355 +            ossFormat = AFMT_S16_NE;
   1.356 +            break;
   1.357 +        case DevFmtUShort:
   1.358 +        case DevFmtFloat:
   1.359 +            free(data);
   1.360 +            ERR("%s capture samples not supported on OSS\n", DevFmtTypeString(device->FmtType));
   1.361 +            return ALC_FALSE;
   1.362 +    }
   1.363 +
   1.364 +    periods = 4;
   1.365 +    numChannels = ChannelsFromDevFmt(device->FmtChans);
   1.366 +    frameSize = numChannels * BytesFromDevFmt(device->FmtType);
   1.367 +    ossSpeed = device->Frequency;
   1.368 +    log2FragmentSize = log2i(device->UpdateSize * device->NumUpdates *
   1.369 +                             frameSize / periods);
   1.370 +
   1.371 +    /* according to the OSS spec, 16 bytes are the minimum */
   1.372 +    if (log2FragmentSize < 4)
   1.373 +        log2FragmentSize = 4;
   1.374 +    numFragmentsLogSize = (periods << 16) | log2FragmentSize;
   1.375 +
   1.376 +#define CHECKERR(func) if((func) < 0) {                                       \
   1.377 +    err = #func;                                                              \
   1.378 +    goto err;                                                                 \
   1.379 +}
   1.380 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_SETFRAGMENT, &numFragmentsLogSize));
   1.381 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_SETFMT, &ossFormat));
   1.382 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_CHANNELS, &numChannels));
   1.383 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_SPEED, &ossSpeed));
   1.384 +    CHECKERR(ioctl(data->fd, SNDCTL_DSP_GETISPACE, &info));
   1.385 +    if(0)
   1.386 +    {
   1.387 +    err:
   1.388 +        ERR("%s failed: %s\n", err, strerror(errno));
   1.389 +        close(data->fd);
   1.390 +        free(data);
   1.391 +        return ALC_FALSE;
   1.392 +    }
   1.393 +#undef CHECKERR
   1.394 +
   1.395 +    if((int)ChannelsFromDevFmt(device->FmtChans) != numChannels)
   1.396 +    {
   1.397 +        ERR("Failed to set %s, got %d channels instead\n", DevFmtChannelsString(device->FmtChans), numChannels);
   1.398 +        close(data->fd);
   1.399 +        free(data);
   1.400 +        return ALC_FALSE;
   1.401 +    }
   1.402 +
   1.403 +    if(!((ossFormat == AFMT_S8 && device->FmtType == DevFmtByte) ||
   1.404 +         (ossFormat == AFMT_U8 && device->FmtType == DevFmtUByte) ||
   1.405 +         (ossFormat == AFMT_S16_NE && device->FmtType == DevFmtShort)))
   1.406 +    {
   1.407 +        ERR("Failed to set %s samples, got OSS format %#x\n", DevFmtTypeString(device->FmtType), ossFormat);
   1.408 +        close(data->fd);
   1.409 +        free(data);
   1.410 +        return ALC_FALSE;
   1.411 +    }
   1.412 +
   1.413 +    data->ring = CreateRingBuffer(frameSize, device->UpdateSize * device->NumUpdates);
   1.414 +    if(!data->ring)
   1.415 +    {
   1.416 +        ERR("Ring buffer create failed\n");
   1.417 +        close(data->fd);
   1.418 +        free(data);
   1.419 +        return ALC_FALSE;
   1.420 +    }
   1.421 +
   1.422 +    data->data_size = info.fragsize;
   1.423 +    data->mix_data = calloc(1, data->data_size);
   1.424 +
   1.425 +    device->ExtraData = data;
   1.426 +    data->thread = StartThread(OSSCaptureProc, device);
   1.427 +    if(data->thread == NULL)
   1.428 +    {
   1.429 +        device->ExtraData = NULL;
   1.430 +        free(data->mix_data);
   1.431 +        free(data);
   1.432 +        return ALC_FALSE;
   1.433 +    }
   1.434 +
   1.435 +    device->szDeviceName = strdup(deviceName);
   1.436 +    return ALC_TRUE;
   1.437 +}
   1.438 +
   1.439 +static void oss_close_capture(ALCdevice *device)
   1.440 +{
   1.441 +    oss_data *data = (oss_data*)device->ExtraData;
   1.442 +    data->killNow = 1;
   1.443 +    StopThread(data->thread);
   1.444 +
   1.445 +    close(data->fd);
   1.446 +
   1.447 +    DestroyRingBuffer(data->ring);
   1.448 +
   1.449 +    free(data->mix_data);
   1.450 +    free(data);
   1.451 +    device->ExtraData = NULL;
   1.452 +}
   1.453 +
   1.454 +static void oss_start_capture(ALCdevice *pDevice)
   1.455 +{
   1.456 +    oss_data *data = (oss_data*)pDevice->ExtraData;
   1.457 +    data->doCapture = 1;
   1.458 +}
   1.459 +
   1.460 +static void oss_stop_capture(ALCdevice *pDevice)
   1.461 +{
   1.462 +    oss_data *data = (oss_data*)pDevice->ExtraData;
   1.463 +    data->doCapture = 0;
   1.464 +}
   1.465 +
   1.466 +static void oss_capture_samples(ALCdevice *pDevice, ALCvoid *pBuffer, ALCuint lSamples)
   1.467 +{
   1.468 +    oss_data *data = (oss_data*)pDevice->ExtraData;
   1.469 +    if(lSamples <= (ALCuint)RingBufferSize(data->ring))
   1.470 +        ReadRingBuffer(data->ring, pBuffer, lSamples);
   1.471 +    else
   1.472 +        alcSetError(pDevice, ALC_INVALID_VALUE);
   1.473 +}
   1.474 +
   1.475 +static ALCuint oss_available_samples(ALCdevice *pDevice)
   1.476 +{
   1.477 +    oss_data *data = (oss_data*)pDevice->ExtraData;
   1.478 +    return RingBufferSize(data->ring);
   1.479 +}
   1.480 +
   1.481 +
   1.482 +static const BackendFuncs oss_funcs = {
   1.483 +    oss_open_playback,
   1.484 +    oss_close_playback,
   1.485 +    oss_reset_playback,
   1.486 +    oss_stop_playback,
   1.487 +    oss_open_capture,
   1.488 +    oss_close_capture,
   1.489 +    oss_start_capture,
   1.490 +    oss_stop_capture,
   1.491 +    oss_capture_samples,
   1.492 +    oss_available_samples
   1.493 +};
   1.494 +
   1.495 +ALCboolean alc_oss_init(BackendFuncs *func_list)
   1.496 +{
   1.497 +    *func_list = oss_funcs;
   1.498 +    return ALC_TRUE;
   1.499 +}
   1.500 +
   1.501 +void alc_oss_deinit(void)
   1.502 +{
   1.503 +}
   1.504 +
   1.505 +void alc_oss_probe(enum DevProbe type)
   1.506 +{
   1.507 +    switch(type)
   1.508 +    {
   1.509 +        case DEVICE_PROBE:
   1.510 +        {
   1.511 +#ifdef HAVE_STAT
   1.512 +            struct stat buf;
   1.513 +            if(stat(GetConfigValue("oss", "device", "/dev/dsp"), &buf) == 0)
   1.514 +#endif
   1.515 +                AppendDeviceList(oss_device);
   1.516 +        }
   1.517 +        break;
   1.518 +
   1.519 +        case ALL_DEVICE_PROBE:
   1.520 +        {
   1.521 +#ifdef HAVE_STAT
   1.522 +            struct stat buf;
   1.523 +            if(stat(GetConfigValue("oss", "device", "/dev/dsp"), &buf) == 0)
   1.524 +#endif
   1.525 +                AppendAllDeviceList(oss_device);
   1.526 +        }
   1.527 +        break;
   1.528 +
   1.529 +        case CAPTURE_DEVICE_PROBE:
   1.530 +        {
   1.531 +#ifdef HAVE_STAT
   1.532 +            struct stat buf;
   1.533 +            if(stat(GetConfigValue("oss", "capture", "/dev/dsp"), &buf) == 0)
   1.534 +#endif
   1.535 +                AppendCaptureDeviceList(oss_device);
   1.536 +        }
   1.537 +        break;
   1.538 +    }
   1.539 +}