dockapps/wmix-3.1/mixer-oss.c

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/* WMix 3.0 -- a mixer using the OSS mixer API.
* Copyright (C) 2000, 2001
* Daniel Richard G. <skunk@mit.edu>,
* timecop <timecop@japan.co.jp>
*
* 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.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <stdlib.h>
#include <fcntl.h>
#include <string.h>
#include <assert.h>
#include <sys/ioctl.h>
#include <sys/soundcard.h>
#include "include/common.h"
#include "include/misc.h"
#include "include/mixer.h"
#define WMVOLUME_CHANNEL_NAMES \
"Master volume", \
"Bass", \
"Treble", \
"FM Synth volume", \
"PCM Wave volume", \
"PC Speaker", \
"Line In level", \
"Microphone level", \
"CD volume", \
"Recording monitor", \
"PCM Wave 2 volume", \
"Recording volume", \
"Input gain", \
"Output gain", \
"Line In 1", \
"Line In 2", \
"Line In 3", \
"Digital In 1", \
"Digital In 2", \
"Digital In 3", \
"Phone input", \
"Phone output", \
"Video volume", \
"Radio volume", \
"Monitor volume"
#ifdef OSS_CHANNEL_NAMES
#define CHANNEL_NAMES SOUND_DEVICE_LABELS
#else
#define CHANNEL_NAMES WMVOLUME_CHANNEL_NAMES
#endif
typedef struct {
const char *name; /* name of channel */
const char *sname; /* short name of the channel */
int dev; /* channel device number */
int prev_dev_lr_volume; /* last known left/right volume
* (in device format) */
float volume; /* volume, in [0, 1] */
float balance; /* balance, in [-1, 1] */
bool can_record; /* capable of recording? */
bool is_recording; /* is it recording? */
bool is_stereo; /* capable of stereo? */
bool is_muted; /* is it muted? */
} MixerChannel;
static const char *channel_names[] = { CHANNEL_NAMES };
static const char *short_names[] = SOUND_DEVICE_LABELS;
static int mixer_fd;
static MixerChannel mixer[SOUND_MIXER_NRDEVICES];
static int n_channels = 0;
static int cur_channel = 0;
static int prev_modify_counter = -1;
static bool get_mixer_state(void)
{
struct mixer_info m_info;
int dev_lr_volume, dev_left_volume, dev_right_volume;
float left, right;
int srcmask;
int ch;
/* to really keep track of updates */
static MixerChannel oldmixer[SOUND_MIXER_NRDEVICES];
ioctl(mixer_fd, SOUND_MIXER_INFO, &m_info);
if (m_info.modify_counter == prev_modify_counter)
/*
* Mixer state has not changed
*/
return false;
/* Mixer state was changed by another program, so we need
* to update. As OSS cannot tell us specifically which
* channels changed, we read all of them in.
*
* prev_modify_counter was initialized to -1, so this part
* is guaranteed to run the first time this routine is
* called.
*/
if (ioctl(mixer_fd, SOUND_MIXER_READ_RECSRC, &srcmask) == -1) {
fprintf(stderr, "mixer read failed\n");
perror(NULL);
exit(EXIT_FAILURE);
}
for (ch = 0; ch < n_channels; ch++) {
if (ioctl(mixer_fd, MIXER_READ(mixer[ch].dev), &dev_lr_volume) ==
-1) {
fprintf(stderr, "mixer read failed\n");
exit(EXIT_FAILURE);
}
if (dev_lr_volume != mixer[ch].prev_dev_lr_volume) {
dev_left_volume = dev_lr_volume & 0xFF;
dev_right_volume = dev_lr_volume >> 8;
if ((dev_left_volume > 0) || (dev_right_volume > 0))
mixer[ch].is_muted = false;
left = (float) dev_left_volume / 100.0;
right = (float) dev_right_volume / 100.0;
if (!mixer[ch].is_muted) {
if (mixer[ch].is_stereo)
lr_to_vb(left,
right, &mixer[ch].volume, &mixer[ch].balance);
else {
mixer[ch].volume = left;
mixer[ch].balance = 0.0;
}
mixer[ch].prev_dev_lr_volume = dev_lr_volume;
}
}
mixer[ch].is_recording = ((1 << mixer[ch].dev) & srcmask) != 0;
}
prev_modify_counter = m_info.modify_counter;
/* check if this was due to OSS stupidity or if we really changed */
if (!memcmp(&mixer, &oldmixer, sizeof(mixer))) {
memcpy(&oldmixer, &mixer, sizeof(mixer));
return false;
}
memcpy(&oldmixer, &mixer, sizeof(mixer));
return true;
}
static void set_mixer_state(void)
{
float left, right;
int dev_left_volume, dev_right_volume, dev_lr_volume;
if (mixer[cur_channel].is_muted) {
left = 0.0;
right = 0.0;
} else
vb_to_lr(mixer[cur_channel].volume,
mixer[cur_channel].balance, &left, &right);
dev_left_volume = (int) (100.0 * left);
dev_right_volume = (int) (100.0 * right);
dev_lr_volume = (dev_right_volume << 8) | dev_left_volume;
ioctl(mixer_fd, MIXER_WRITE(mixer[cur_channel].dev), &dev_lr_volume);
}
static void get_record_state(void)
{
int srcmask;
int ch;
if (ioctl(mixer_fd, SOUND_MIXER_READ_RECSRC, &srcmask) == -1) {
fprintf(stderr, "mixer read failed\n");
perror(NULL);
exit(EXIT_FAILURE);
}
for (ch = 0; ch < n_channels; ch++) {
mixer[ch].is_recording = ((1 << mixer[ch].dev) & srcmask) != 0;
}
}
static void set_record_state(void)
{
int srcmask;
if (ioctl(mixer_fd, SOUND_MIXER_READ_RECSRC, &srcmask) == -1) {
fputs("error: recording source mask ioctl failed\n", stderr);
exit(EXIT_FAILURE);
}
if (((1 << mixer[cur_channel].dev) & srcmask) == 0)
srcmask |= (1 << mixer[cur_channel].dev);
else
srcmask &= ~(1 << mixer[cur_channel].dev);
if (ioctl(mixer_fd, SOUND_MIXER_WRITE_RECSRC, &srcmask) == -1) {
fputs("error: recording source mask ioctl failed\n", stderr);
exit(EXIT_FAILURE);
}
}
void mixer_init(const char *mixer_device, bool verbose, const char * exclude[])
{
int devmask, srcmask, recmask, stmask;
struct mixer_info m_info;
int count;
int mask;
mixer_fd = open(mixer_device, O_RDWR);
if (mixer_fd == -1) {
fprintf(stderr, "error: cannot open mixer device %s\n",
mixer_device);
exit(EXIT_FAILURE);
}
if (ioctl(mixer_fd, SOUND_MIXER_READ_DEVMASK, &devmask) == -1) {
fputs("error: device mask ioctl failed\n", stderr);
exit(EXIT_FAILURE);
}
if (ioctl(mixer_fd, SOUND_MIXER_READ_RECSRC, &srcmask) == -1) {
fputs("error: recording source mask ioctl failed\n", stderr);
exit(EXIT_FAILURE);
}
if (ioctl(mixer_fd, SOUND_MIXER_READ_RECMASK, &recmask) == -1) {
fputs("error: recording mask ioctl failed\n", stderr);
exit(EXIT_FAILURE);
}
if (ioctl(mixer_fd, SOUND_MIXER_READ_STEREODEVS, &stmask) == -1) {
fputs("error: stereo mask ioctl failed\n", stderr);
exit(EXIT_FAILURE);
}
if (ioctl(mixer_fd, SOUND_MIXER_INFO, &m_info) == -1) {
fputs("error: could not read mixer info\n", stderr);
exit(EXIT_FAILURE);
}
if (verbose) {
printf("%s (%s)\n", m_info.name, m_info.id);
puts("Supported channels:");
}
for (count = 0; count < SOUND_MIXER_NRDEVICES; count++) {
mask = 1 << count;
if ((mask & devmask) && (!is_exclude((short_names[count]),exclude))) {
mixer[n_channels].name = channel_names[count];
mixer[n_channels].sname = short_names[count];
mixer[n_channels].dev = count;
mixer[n_channels].prev_dev_lr_volume = -1;
mixer[n_channels].can_record = (mask & recmask) != 0;
mixer[n_channels].is_recording = (mask & srcmask) != 0;
mixer[n_channels].is_stereo = (mask & stmask) != 0;
mixer[n_channels].is_muted = false;
++n_channels;
if (verbose)
printf(" %d: %s \t(%s)\n", n_channels,
channel_names[count],
short_names[count]);
} else if ((mask & devmask) && verbose)
printf(" x: %s \t(%s) - disabled\n", channel_names[count],
short_names[count]);
}
get_mixer_state();
}
bool mixer_is_changed(void)
{
return get_mixer_state();
}
int mixer_get_channel_count(void)
{
return n_channels;
}
int mixer_get_channel(void)
{
return cur_channel;
}
const char *mixer_get_channel_name(void)
{
return mixer[cur_channel].name;
}
const char *mixer_get_short_name(void)
{
return mixer[cur_channel].sname;
}
void mixer_set_channel(int channel)
{
assert((channel >= 0) && (channel < n_channels));
cur_channel = channel;
get_record_state();
}
void mixer_set_channel_rel(int delta_channel)
{
cur_channel = (cur_channel + delta_channel) % n_channels;
if (cur_channel < 0)
cur_channel += n_channels;
get_record_state();
}
float mixer_get_volume(void)
{
get_mixer_state();
return mixer[cur_channel].volume;
}
void mixer_set_volume(float volume)
{
assert((volume >= 0.0) && (volume <= 1.0));
mixer[cur_channel].volume = volume;
set_mixer_state();
}
void mixer_set_volume_rel(float delta_volume)
{
mixer[cur_channel].volume += delta_volume;
mixer[cur_channel].volume = CLAMP(mixer[cur_channel].volume, 0.0, 1.0);
set_mixer_state();
}
float mixer_get_balance(void)
{
get_mixer_state();
return mixer[cur_channel].balance;
}
void mixer_set_balance(float balance)
{
assert((balance >= -1.0) && (balance <= 1.0));
if (mixer[cur_channel].is_stereo) {
mixer[cur_channel].balance = balance;
set_mixer_state();
}
}
void mixer_set_balance_rel(float delta_balance)
{
if (mixer[cur_channel].is_stereo) {
mixer[cur_channel].balance += delta_balance;
mixer[cur_channel].balance =
CLAMP(mixer[cur_channel].balance, -1.0, 1.0);
set_mixer_state();
}
}
void mixer_toggle_mute(void)
{
mixer[cur_channel].is_muted = !mixer[cur_channel].is_muted;
set_mixer_state();
}
void mixer_toggle_rec(void)
{
if (mixer[cur_channel].can_record) {
mixer[cur_channel].is_recording = !mixer[cur_channel].is_recording;
set_record_state();
get_record_state();
}
}
bool mixer_is_muted(void)
{
return mixer[cur_channel].is_muted;
}
bool mixer_is_stereo(void)
{
return mixer[cur_channel].is_stereo;
}
bool mixer_is_rec(void)
{
return mixer[cur_channel].is_recording;
}
bool mixer_can_rec(void)
{
return mixer[cur_channel].can_record;
}
bool is_exclude(const char *short_name, const char *exclude[])
{
int count = 0;
while (count < SOUND_MIXER_NRDEVICES && exclude[count] != NULL){
if ( strcmp(short_name, exclude[count]) == 0 )
return true;
count++;
}
return false;
}