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dockapps/wmix/wmix.c
Jeremy Sowden 7e43b2a679 wmix: fix multiple definitions of global variables. 
The mixer API variables are declared in a header with no explicit
linkage.  This results in there being definitions of them in multiple
object files, which causes a link failure with GCC 10, since this
uses -fno-common by default.

Add `extern` to the header declarations and separate declarations with
no linkage in mixer.c where they are assigned.

Link: https://bugs.debian.org/957947
Signed-off-by: Jeremy Sowden <jeremy@azazel.net>
2020-04-18 19:46:37 +01:00

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/* WMix 3.0 -- a mixer using the OSS mixer API.
* Copyright (C) 2000, 2001 timecop@japan.co.jp
* Mixer code in version 3.0 based on mixer api library by
* Daniel Richard G. <skunk@mit.edu>, which in turn was based on
* the mixer code in WMix 2.x releases.
*
* 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <string.h>
#include <getopt.h>
#include <unistd.h>
#include <X11/X.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/extensions/Xrandr.h>
#include "include/common.h"
#include "include/mixer.h"
#include "include/misc.h"
#include "include/ui_x.h"
#include "include/mmkeys.h"
#include "include/config.h"
#include "include/mixer-oss.h"
#include "include/mixer-alsa.h"
void (*mixer_init)(const char *mixer_device,
bool verbose,
const char *exclude[]);
bool (*mixer_is_changed)(void);
int (*mixer_get_channel_count)(void);
int (*mixer_get_channel)(void);
const char *(*mixer_get_channel_name)(void);
const char *(*mixer_get_short_name)(void);
void (*mixer_set_channel)(int channel);
void (*mixer_set_channel_rel)(int delta_channel);
float (*mixer_get_volume)(void);
void (*mixer_set_volume)(float volume);
void (*mixer_set_volume_rel)(float delta_volume);
float (*mixer_get_balance)(void);
void (*mixer_set_balance)(float balance);
void (*mixer_set_balance_rel)(float delta_balance);
void (*mixer_toggle_mute)(void);
void (*mixer_toggle_rec)(void);
bool (*mixer_is_muted)(void);
bool (*mixer_is_stereo)(void);
bool (*mixer_is_rec)(void);
bool (*mixer_can_rec)(void);
bool (*is_exclude)(const char *short_name,
const char *exclude[]);
void (*mixer_tick)(void);
static Display *display;
static bool button_pressed = false;
static bool slider_pressed = false;
static double prev_button_press_time = 0.0;
static float display_height;
static float display_width;
static int mouse_drag_home_x;
static int mouse_drag_home_y;
static int idle_loop;
/* local stuff */
static void signal_catch(int sig);
static void button_press_event(XButtonEvent *event);
static void button_release_event(XButtonEvent *event);
static int key_press_event(XKeyEvent *event);
static void motion_event(XMotionEvent *event);
static void choose_api(int api);
int main(int argc, char **argv)
{
XEvent event;
int rr_event_base, rr_error_base;
Bool have_randr;
config_init();
parse_cli_options(argc, argv);
config_read();
config_set_defaults();
choose_api(config.api);
mixer_init(config.mixer_device, config.verbose, (const char **)config.exclude_channel);
mixer_set_channel(0);
display = XOpenDisplay(config.display_name);
if (display == NULL) {
const char *name;
if (config.display_name) {
name = config.display_name;
} else {
name = getenv("DISPLAY");
if (name == NULL) {
fprintf(stderr, "wmix:error: Unable to open display, variable $DISPLAY not set\n");
return EXIT_FAILURE;
}
}
fprintf(stderr, "wmix:error: Unable to open display \"%s\"\n", name);
return EXIT_FAILURE;
}
have_randr = XRRQueryExtension(display, &rr_event_base, &rr_error_base);
if (have_randr) {
int rr_mask = RRScreenChangeNotifyMask;
XRRSelectInput(display,
RootWindow(display, DefaultScreen(display)),
rr_mask);
}
display_width = (float)DisplayWidth(display, DefaultScreen(display)) / 4.0;
display_height = (float)DisplayHeight(display, DefaultScreen(display)) / 2.0;
dockapp_init(display, have_randr);
new_window("wmix", 64, 64, argc, argv);
new_osd(60);
if (config.mmkeys)
mmkey_install(display);
config_release();
blit_string("wmix " VERSION);
scroll_text(3, 4, 57, true);
ui_update();
/* add click regions */
add_region(1, 37, 36, 25, 25); /* knob */
add_region(2, 4, 42, 27, 15); /* balancer */
add_region(3, 2, 26, 7, 10); /* previous channel */
add_region(4, 10, 26, 7, 10); /* next channel */
add_region(5, 39, 14, 20, 7); /* mute toggle */
add_region(6, 4, 14, 13, 7); /* rec toggle */
add_region(10, 3, 4, 56, 7); /* re-scroll current channel name */
/* setup up/down signal handler */
create_pid_file();
signal(SIGUSR1, (void *) signal_catch);
signal(SIGUSR2, (void *) signal_catch);
while (true) {
if (button_pressed || slider_pressed || (XPending(display) > 0)) {
XNextEvent(display, &event);
switch (event.type) {
case KeyPress:
if (key_press_event(&event.xkey))
idle_loop = 0;
break;
case Expose:
redraw_window();
break;
case ButtonPress:
button_press_event(&event.xbutton);
idle_loop = 0;
break;
case ButtonRelease:
button_release_event(&event.xbutton);
idle_loop = 0;
break;
case MotionNotify:
/* process cursor change, or drag events */
motion_event(&event.xmotion);
idle_loop = 0;
break;
case LeaveNotify:
/* go back to standard cursor */
if ((!button_pressed) && (!slider_pressed))
set_cursor(NORMAL_CURSOR);
break;
case DestroyNotify:
XCloseDisplay(display);
return EXIT_SUCCESS;
default:
if (have_randr) {
if (event.type == rr_event_base + RRScreenChangeNotify) {
XRRUpdateConfiguration(&event);
ui_rrnotify();
}
}
break;
}
} else {
usleep(100000);
if (mixer_tick)
mixer_tick();
scroll_text(3, 4, 57, false);
/* rescroll message after some delay */
if (idle_loop++ > 256) {
scroll_text(3, 4, 57, true);
idle_loop = 0;
}
/* get rid of OSD after a few seconds of idle */
if ((idle_loop > 15) && osd_mapped() && !button_pressed) {
unmap_osd();
idle_loop = 0;
}
if (mixer_is_changed())
ui_update();
}
}
return EXIT_SUCCESS;
}
static void signal_catch(int sig)
{
switch (sig) {
case SIGUSR1:
mixer_set_volume_rel(config.scrollstep);
if (!osd_mapped())
map_osd();
if (osd_mapped())
update_osd(mixer_get_volume(), false);
ui_update();
idle_loop = 0;
break;
case SIGUSR2:
mixer_set_volume_rel(-config.scrollstep);
if (!osd_mapped())
map_osd();
if (osd_mapped())
update_osd(mixer_get_volume(), false);
ui_update();
idle_loop = 0;
break;
}
}
static void choose_api(int api)
{
if (api == 0) {
mixer_init = &mixer_alsa_init;
mixer_is_changed = &mixer_alsa_is_changed;
mixer_get_channel_count = mixer_alsa_get_channel_count;
mixer_get_channel = mixer_alsa_get_channel;
mixer_get_channel_name = mixer_alsa_get_channel_name;
mixer_get_short_name = mixer_alsa_get_short_name;
mixer_set_channel = mixer_alsa_set_channel;
mixer_set_channel_rel = mixer_alsa_set_channel_rel;
mixer_get_volume = mixer_alsa_get_volume;
mixer_set_volume = mixer_alsa_set_volume;
mixer_set_volume_rel = mixer_alsa_set_volume_rel;
mixer_get_balance = mixer_alsa_get_balance;
mixer_set_balance = mixer_alsa_set_balance;
mixer_set_balance_rel = mixer_alsa_set_balance_rel;
mixer_toggle_mute = mixer_alsa_toggle_mute;
mixer_toggle_rec = mixer_alsa_toggle_rec;
mixer_is_muted = mixer_alsa_is_muted;
mixer_is_stereo = mixer_alsa_is_stereo;
mixer_is_rec = mixer_alsa_is_rec;
mixer_can_rec = mixer_alsa_can_rec;
mixer_tick = mixer_alsa_tick;
} else if (api == 1) {
mixer_init = &mixer_oss_init;
mixer_is_changed = &mixer_oss_is_changed;
mixer_get_channel_count = mixer_oss_get_channel_count;
mixer_get_channel = mixer_oss_get_channel;
mixer_get_channel_name = mixer_oss_get_channel_name;
mixer_get_short_name = mixer_oss_get_short_name;
mixer_set_channel = mixer_oss_set_channel;
mixer_set_channel_rel = mixer_oss_set_channel_rel;
mixer_get_volume = mixer_oss_get_volume;
mixer_set_volume = mixer_oss_set_volume;
mixer_set_volume_rel = mixer_oss_set_volume_rel;
mixer_get_balance = mixer_oss_get_balance;
mixer_set_balance = mixer_oss_set_balance;
mixer_set_balance_rel = mixer_oss_set_balance_rel;
mixer_toggle_mute = mixer_oss_toggle_mute;
mixer_toggle_rec = mixer_oss_toggle_rec;
mixer_is_muted = mixer_oss_is_muted;
mixer_is_stereo = mixer_oss_is_stereo;
mixer_is_rec = mixer_oss_is_rec;
mixer_can_rec = mixer_oss_can_rec;
mixer_tick = NULL;
}
}
static void button_press_event(XButtonEvent *event)
{
double button_press_time = get_current_time();
int x = event->x;
int y = event->y;
bool double_click = false;
/* handle wheel scrolling to adjust volume */
if (config.mousewheel) {
if (event->button == config.wheel_button_up) {
mixer_set_volume_rel(config.scrollstep);
if (!osd_mapped())
map_osd();
if (osd_mapped())
update_osd(mixer_get_volume(), false);
ui_update();
return;
}
if (event->button == config.wheel_button_down) {
mixer_set_volume_rel(-config.scrollstep);
if (!osd_mapped())
map_osd();
if (osd_mapped())
update_osd(mixer_get_volume(), false);
ui_update();
return;
}
}
if ((button_press_time - prev_button_press_time) <= 0.5) {
double_click = true;
prev_button_press_time = 0.0;
} else
prev_button_press_time = button_press_time;
switch (check_region(x, y)) {
case 1: /* on knob */
button_pressed = true;
slider_pressed = false;
mouse_drag_home_x = x;
mouse_drag_home_y = y;
if (double_click) {
mixer_toggle_mute();
ui_update();
}
break;
case 2: /* on slider */
button_pressed = false;
slider_pressed = true;
mouse_drag_home_x = x;
mouse_drag_home_y = y;
if (double_click) {
mixer_set_balance(0.0);
ui_update();
}
break;
case 3: /* previous channel */
mixer_set_channel_rel(-1);
blit_string(config.scrolltext ? mixer_get_channel_name() : mixer_get_short_name());
scroll_text(3, 4, 57, true);
unmap_osd();
map_osd();
ui_update();
break;
case 4: /* next channel */
mixer_set_channel_rel(1);
blit_string(config.scrolltext ? mixer_get_channel_name() : mixer_get_short_name());
scroll_text(3, 4, 57, true);
unmap_osd();
map_osd();
ui_update();
break;
case 5: /* toggle mute */
mixer_toggle_mute();
ui_update();
break;
case 6: /* toggle rec */
mixer_toggle_rec();
ui_update();
break;
case 10:
scroll_text(3, 4, 57, true);
break;
default:
printf("unknown region pressed\n");
break;
}
}
static int key_press_event(XKeyEvent *event)
{
if (event->keycode == mmkeys.raise_volume) {
mixer_set_volume_rel(config.scrollstep);
if (!osd_mapped())
map_osd();
if (osd_mapped())
update_osd(mixer_get_volume(), false);
ui_update();
return 1;
}
if (event->keycode == mmkeys.lower_volume) {
mixer_set_volume_rel(-config.scrollstep);
if (!osd_mapped())
map_osd();
if (osd_mapped())
update_osd(mixer_get_volume(), false);
ui_update();
return 1;
}
if (event->keycode == mmkeys.mute) {
mixer_toggle_mute();
ui_update();
return 1;
}
/* Ignore other keys */
return 0;
}
static void button_release_event(XButtonEvent *event)
{
int x = event->x;
int y = event->y;
int region;
region = check_region(x, y);
if (region == 1)
set_cursor(HAND_CURSOR);
button_pressed = false;
slider_pressed = false;
}
static void motion_event(XMotionEvent *event)
{
int x = event->x;
int y = event->y;
int region;
if ((x == mouse_drag_home_x) && (y == mouse_drag_home_y))
return;
region = check_region(x, y);
if (button_pressed) {
if (y != mouse_drag_home_y) {
float delta;
set_cursor(NULL_CURSOR);
delta = (float)(mouse_drag_home_y - y) / display_height;
knob_turn(delta);
if (!osd_mapped())
map_osd();
if (osd_mapped())
update_osd(mixer_get_volume(), false);
}
XWarpPointer(display, None, event->window, x, y, 0, 0,
mouse_drag_home_x, mouse_drag_home_y);
return;
}
if (slider_pressed) {
if (x != mouse_drag_home_x) {
float delta;
set_cursor(NULL_CURSOR);
delta = (float)(x - mouse_drag_home_x) / display_width;
slider_move(delta);
}
XWarpPointer(display, None, event->window, x, y, 0, 0,
mouse_drag_home_x, mouse_drag_home_y);
return;
}
if (region == 1)
set_cursor(HAND_CURSOR);
else if (region == 2)
set_cursor(BAR_CURSOR);
else
set_cursor(NORMAL_CURSOR);
}
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