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/*
* MOC - music on console
* Copyright (C) 2003 - 2005 Damian Pietras <daper@daper.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdio.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/types.h>
#include <fcntl.h>
#include <errno.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <assert.h>
#ifdef HAVE_SYS_SOUNDCARD_H
# include <sys/soundcard.h>
#else
# include <soundcard.h>
#endif
#include "common.h"
#include "server.h"
#include "audio.h"
#include "log.h"
#include "options.h"
#if OSS_VERSION >= 0x40000 || SOUND_VERSION >= 0x40000
#define OSSv4_MIXER
#else
#define OSSv3_MIXER
#endif
static bool started = false;
static int volatile dsp_fd = -1;
#ifdef OSSv3_MIXER
static int mixer_fd = -1;
static int mixer_channel1 = -1;
static int mixer_channel2 = -1;
static int mixer_channel_current;
#endif
static struct sound_params params = { 0, 0, 0 };
static const struct {
const char *name;
const int num;
} mixer_channels[] = {
{ "pcm", SOUND_MIXER_PCM },
{ "master", SOUND_MIXER_VOLUME },
{ "speaker", SOUND_MIXER_SPEAKER }
};
#define MIXER_CHANNELS_NUM (ARRAY_SIZE(mixer_channels))
static int open_dev ()
{
if ((dsp_fd = open (options_get_str ("OSSDevice"), O_WRONLY)) == -1) {
char *err = xstrerror (errno);
error ("Can't open %s: %s", options_get_str ("OSSDevice"), err);
free (err);
return 0;
}
logit ("Audio device opened");
return 1;
}
/* Fill caps with the device capabilities. Return 0 on error. */
static int set_capabilities (struct output_driver_caps *caps)
{
int format_mask;
if (!open_dev ()) {
error ("Can't open the device.");
return 0;
}
if (ioctl (dsp_fd, SNDCTL_DSP_GETFMTS, &format_mask) == -1) {
error_errno ("Can't get supported audio formats", errno);
close (dsp_fd);
return 0;
}
caps->formats = 0;
if (format_mask & AFMT_S8)
caps->formats |= SFMT_S8;
if (format_mask & AFMT_U8)
caps->formats |= SFMT_U8;
if (format_mask & AFMT_S16_LE)
caps->formats |= SFMT_S16 | SFMT_LE;
if (format_mask & AFMT_S16_BE)
caps->formats |= SFMT_S16 | SFMT_BE;
#if defined(AFMT_S32_LE) && defined(AFMT_S32_BE)
if (format_mask & AFMT_S32_LE)
caps->formats |= SFMT_S32 | SFMT_LE;
if (format_mask & AFMT_S32_BE)
caps->formats |= SFMT_S32 | SFMT_BE;
#endif
if (!caps->formats) {
/* Workaround for vmix which lies that it doesn't support any
* format. */
error ("The driver claims that no format known to me is "
"supported. I will assume that SFMT_S8 and "
"SFMT_S16 (native endian) are supported.");
caps->formats = SFMT_S8 | SFMT_S16 | SFMT_NE;
}
caps->min_channels = caps->max_channels = 1;
if (ioctl (dsp_fd, SNDCTL_DSP_CHANNELS, &caps->min_channels)) {
error_errno ("Can't set number of channels", errno);
close (dsp_fd);
return 0;
}
close (dsp_fd);
if (!open_dev ()) {
error ("Can't open the device.");
return 0;
}
if (caps->min_channels != 1)
caps->min_channels = 2;
caps->max_channels = 2;
if (ioctl (dsp_fd, SNDCTL_DSP_CHANNELS, &caps->max_channels)) {
error_errno ("Can't set number of channels", errno);
close (dsp_fd);
return 0;
}
if (caps->max_channels != 2) {
if (caps->min_channels == 2) {
error ("Can't get any supported number of channels.");
close (dsp_fd);
return 0;
}
caps->max_channels = 1;
}
close (dsp_fd);
return 1;
}
/* Get PCM volume. Return -1 on error. */
static int oss_read_mixer ()
{
int vol;
if (!started)
return -1;
#ifdef OSSv3_MIXER
if (mixer_fd != -1 && mixer_channel_current != -1) {
if (ioctl (mixer_fd, MIXER_READ(mixer_channel_current), &vol) == -1)
#else
if (dsp_fd != -1) {
if (ioctl (dsp_fd, SNDCTL_DSP_GETPLAYVOL, &vol) == -1)
#endif
{
error ("Can't read from mixer");
}
else {
/* Average between left and right */
return ((vol & 0xFF) + ((vol >> 8) & 0xFF)) / 2;
}
}
return -1;
}
static int oss_mixer_name_to_channel (const char *name)
{
size_t ix;
for (ix = 0; ix < MIXER_CHANNELS_NUM; ix += 1) {
if (!strcasecmp (mixer_channels[ix].name, name))
return ix;
}
return -1;
}
static int oss_init (struct output_driver_caps *caps)
{
#ifdef OSSv3_MIXER
/* Open the mixer device */
mixer_fd = open (options_get_str ("OSSMixerDevice"), O_RDWR);
if (mixer_fd == -1) {
char *err = xstrerror (errno);
error ("Can't open mixer device %s: %s",
options_get_str ("OSSMixerDevice"), err);
free (err);
}
else {
mixer_channel1 = oss_mixer_name_to_channel (
options_get_symb ("OSSMixerChannel1"));
mixer_channel2 = oss_mixer_name_to_channel (
options_get_symb ("OSSMixerChannel2"));
if (mixer_channel1 == -1)
fatal ("Bad first OSS mixer channel!");
if (mixer_channel2 == -1)
fatal ("Bad second OSS mixer channel!");
/* test mixer channels */
mixer_channel_current = mixer_channel1;
if (oss_read_mixer () == -1)
mixer_channel1 = -1;
mixer_channel_current = mixer_channel2;
if (oss_read_mixer () == -1)
mixer_channel2 = -1;
if (mixer_channel1 != -1)
mixer_channel_current = mixer_channel1;
}
#endif
return set_capabilities (caps);
}
static void oss_shutdown ()
{
#ifdef OSSv3_MIXER
if (mixer_fd != -1) {
close (mixer_fd);
mixer_fd = -1;
}
#endif
}
static void oss_close ()
{
if (dsp_fd != -1) {
close (dsp_fd);
dsp_fd = -1;
logit ("Audio device closed");
}
started = false;
params.channels = 0;
params.rate = 0;
params.fmt = 0;
}
/* Return 0 on error. */
static int oss_set_params ()
{
int req_format;
int req_channels;
char fmt_name[SFMT_STR_MAX];
/* Set format */
switch (params.fmt & SFMT_MASK_FORMAT) {
case SFMT_S8:
req_format = AFMT_S8;
break;
case SFMT_U8:
req_format = AFMT_U8;
break;
case SFMT_S16:
if (params.fmt & SFMT_LE)
req_format = AFMT_S16_LE;
else
req_format = AFMT_S16_BE;
break;
#if defined(AFMT_S32_LE) && defined(AFMT_S32_BE)
case SFMT_S32:
if (params.fmt & SFMT_LE)
req_format = AFMT_S32_LE;
else
req_format = AFMT_S32_BE;
break;
#endif
default:
error ("Format %s is not supported by the device",
sfmt_str (params.fmt, fmt_name, sizeof (fmt_name)));
return 0;
}
if (ioctl (dsp_fd, SNDCTL_DSP_SETFMT, &req_format) == -1) {
error_errno ("Can't set audio format", errno);
oss_close ();
return 0;
}
/* Set number of channels */
req_channels = params.channels;
if (ioctl (dsp_fd, SNDCTL_DSP_CHANNELS, &req_channels) == -1) {
char *err = xstrerror (errno);
error ("Can't set number of channels to %d: %s",
params.channels, err);
free (err);
oss_close ();
return 0;
}
if (params.channels != req_channels) {
error ("Can't set number of channels to %d, "
"device doesn't support this value",
params.channels);
oss_close ();
return 0;
}
/* Set sample rate */
if (ioctl (dsp_fd, SNDCTL_DSP_SPEED, ¶ms.rate) == -1) {
char *err = xstrerror (errno);
error ("Can't set sampling rate to %d: %s", params.rate, err);
free (err);
oss_close ();
return 0;
}
logit ("Audio parameters set to: %s, %d channels, %dHz",
sfmt_str (params.fmt, fmt_name, sizeof (fmt_name)),
params.channels, params.rate);
return 1;
}
/* Return 0 on failure. */
static int oss_open (struct sound_params *sound_params)
{
params = *sound_params;
if (!open_dev ())
return 0;
if (!oss_set_params ()) {
oss_close ();
return 0;
}
started = true;
return 1;
}
/* Return -1 on error, or number of bytes played when okay. */
static int oss_play (const char *buff, const size_t size)
{
ssize_t ssize = (ssize_t) size;
ssize_t count = 0;
if (dsp_fd == -1) {
error ("Can't play: audio device isn't opened!");
return -1;
}
while (count < ssize) {
ssize_t rc;
rc = write (dsp_fd, buff + count, ssize - count);
if (rc == -1) {
error_errno ("Error writing pcm sound", errno);
return -1;
}
count += rc;
}
return count;
}
/* Set PCM volume */
static void oss_set_mixer (int vol)
{
#ifdef OSSv3_MIXER
if (mixer_fd != -1)
#else
if (dsp_fd != -1)
#endif
{
vol = CLAMP(0, vol, 100);
vol |= vol << 8;
#ifdef OSSv3_MIXER
if (ioctl (mixer_fd, MIXER_WRITE(mixer_channel_current), &vol) == -1)
#else
if (ioctl (dsp_fd, SNDCTL_DSP_SETPLAYVOL, &vol) == -1)
#endif
{
error ("Can't set mixer: ioctl() failed");
}
}
}
/* Return number of bytes in device buffer. */
static int oss_get_buff_fill ()
{
audio_buf_info buff_info;
if (dsp_fd == -1)
return 0;
if (ioctl (dsp_fd, SNDCTL_DSP_GETOSPACE, &buff_info) == -1) {
error ("SNDCTL_DSP_GETOSPACE failed");
return 0;
}
return (buff_info.fragstotal * buff_info.fragsize) - buff_info.bytes;
}
/* Reset device buffer and stop playing immediately. Return 0 on error. */
static int oss_reset ()
{
if (dsp_fd == -1) {
logit ("Reset when audio device is not opened");
return 0;
}
logit ("Resetting audio device");
if (ioctl (dsp_fd, SNDCTL_DSP_RESET, NULL) == -1)
error ("Resetting audio device failed");
close (dsp_fd);
dsp_fd = -1;
if (!open_dev () || !oss_set_params ()) {
error ("Failed to open audio device after resetting");
return 0;
}
return 1;
}
static void oss_toggle_mixer_channel ()
{
#ifdef OSSv3_MIXER
if (mixer_channel_current == mixer_channel1 && mixer_channel2 != -1)
mixer_channel_current = mixer_channel2;
else if (mixer_channel1 != -1)
mixer_channel_current = mixer_channel1;
#endif
}
static char *oss_get_mixer_channel_name ()
{
#ifdef OSSv3_MIXER
if (mixer_channel_current == mixer_channel1)
return xstrdup (options_get_symb ("OSSMixerChannel1"));
return xstrdup (options_get_symb ("OSSMixerChannel2"));
#else
return xstrdup ("moc");
#endif
}
static int oss_get_rate ()
{
return params.rate;
}
void oss_funcs (struct hw_funcs *funcs)
{
funcs->init = oss_init;
funcs->shutdown = oss_shutdown;
funcs->open = oss_open;
funcs->close = oss_close;
funcs->play = oss_play;
funcs->read_mixer = oss_read_mixer;
funcs->set_mixer = oss_set_mixer;
funcs->get_buff_fill = oss_get_buff_fill;
funcs->reset = oss_reset;
funcs->get_rate = oss_get_rate;
funcs->toggle_mixer_channel = oss_toggle_mixer_channel;
funcs->get_mixer_channel_name = oss_get_mixer_channel_name;
}
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