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alsa-utils/alsamixer/mixer_controls.c
Clemens Ladisch f2e9e9a5b0 alsamixer: remove obsolete e-mail 
Tim Janik's e-mail address is no longer valid.

Signed-off-by: Clemens Ladisch <clemens@ladisch.de>
2010-11-10 10:14:53 +01:00

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/*
* mixer_controls.c - handles mixer controls and mapping from selems
* Copyright (c) 1998,1999 Tim Janik
* Jaroslav Kysela <perex@perex.cz>
* Copyright (c) 2009 Clemens Ladisch <clemens@ladisch.de>
*
* 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, see <http://www.gnu.org/licenses/>.
*/
#include "aconfig.h"
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#include CURSESINC
#include <alsa/asoundlib.h>
#include "utils.h"
#include "mem.h"
#include "mixer_display.h"
#include "mixer_widget.h"
#include "mixer_controls.h"
struct control *controls;
unsigned int controls_count;
static const snd_mixer_selem_channel_id_t supported_channels[] = {
SND_MIXER_SCHN_FRONT_LEFT,
SND_MIXER_SCHN_FRONT_RIGHT,
SND_MIXER_SCHN_REAR_LEFT,
SND_MIXER_SCHN_REAR_RIGHT,
SND_MIXER_SCHN_FRONT_CENTER,
SND_MIXER_SCHN_WOOFER,
SND_MIXER_SCHN_SIDE_LEFT,
SND_MIXER_SCHN_SIDE_RIGHT,
};
#define LAST_SUPPORTED_CHANNEL SND_MIXER_SCHN_SIDE_RIGHT
static const snd_mixer_selem_channel_id_t control_channels[][2] = {
{ SND_MIXER_SCHN_FRONT_LEFT, SND_MIXER_SCHN_FRONT_RIGHT },
{ SND_MIXER_SCHN_REAR_LEFT, SND_MIXER_SCHN_REAR_RIGHT },
{ SND_MIXER_SCHN_FRONT_CENTER, SND_MIXER_SCHN_UNKNOWN },
{ SND_MIXER_SCHN_WOOFER, SND_MIXER_SCHN_UNKNOWN },
{ SND_MIXER_SCHN_SIDE_LEFT, SND_MIXER_SCHN_SIDE_RIGHT },
};
bool are_there_any_controls(void)
{
snd_mixer_elem_t *elem;
unsigned int i;
for (elem = snd_mixer_first_elem(mixer);
elem;
elem = snd_mixer_elem_next(elem)) {
if (snd_mixer_elem_get_type(elem) != SND_MIXER_ELEM_SIMPLE)
continue;
if (snd_mixer_selem_is_enumerated(elem))
return TRUE;
if (snd_mixer_selem_has_playback_volume_joined(elem) ||
snd_mixer_selem_has_capture_volume_joined(elem) ||
snd_mixer_selem_has_playback_switch_joined(elem) ||
snd_mixer_selem_has_capture_switch_joined(elem))
return TRUE;
for (i = 0; i < ARRAY_SIZE(supported_channels); ++i)
if (snd_mixer_selem_has_playback_channel(elem, supported_channels[i]) ||
snd_mixer_selem_has_capture_channel(elem, supported_channels[i]))
return TRUE;
}
return FALSE;
}
static bool has_more_than_front_capture_channels(snd_mixer_elem_t *elem)
{
unsigned int i;
for (i = 2; i < ARRAY_SIZE(supported_channels); ++i)
if (snd_mixer_selem_has_capture_channel(elem, supported_channels[i]))
return TRUE;
return FALSE;
}
static bool has_any_control_channel(snd_mixer_elem_t *elem,
const snd_mixer_selem_channel_id_t channels[2],
int (*has_channel)(snd_mixer_elem_t *, snd_mixer_selem_channel_id_t))
{
return has_channel(elem, channels[0]) ||
(channels[1] != SND_MIXER_SCHN_UNKNOWN && has_channel(elem, channels[1]));
}
static bool has_merged_cswitch(snd_mixer_elem_t *elem)
{
bool pvol, psw;
unsigned int i;
pvol = snd_mixer_selem_has_playback_volume(elem);
psw = snd_mixer_selem_has_playback_switch(elem);
if ((pvol || psw) &&
snd_mixer_selem_has_capture_switch(elem) &&
!snd_mixer_selem_has_capture_volume(elem)) {
if (snd_mixer_selem_has_capture_switch_joined(elem))
return TRUE;
else if (((pvol && snd_mixer_selem_has_playback_volume_joined(elem)) ||
(psw && snd_mixer_selem_has_playback_switch_joined(elem))) &&
has_more_than_front_capture_channels(elem))
return FALSE;
for (i = 0; i < ARRAY_SIZE(control_channels); ++i) {
if (has_any_control_channel(elem, control_channels[i], snd_mixer_selem_has_capture_channel) &&
!has_any_control_channel(elem, control_channels[i], snd_mixer_selem_has_playback_channel))
return FALSE;
}
return TRUE;
}
return FALSE;
}
static unsigned int get_playback_controls_count(snd_mixer_elem_t *elem)
{
unsigned int count = 0;
unsigned int i;
int has_vol, has_sw;
has_vol = snd_mixer_selem_has_playback_volume(elem);
has_sw = snd_mixer_selem_has_playback_switch(elem);
if (!has_vol && !has_sw)
return 0;
if ((!has_vol || snd_mixer_selem_has_playback_volume_joined(elem)) &&
(!has_sw || snd_mixer_selem_has_playback_switch_joined(elem)))
return 1;
for (i = 0; i < ARRAY_SIZE(control_channels); ++i) {
if (snd_mixer_selem_has_playback_channel(elem, control_channels[i][0]) ||
(control_channels[i][1] != SND_MIXER_SCHN_UNKNOWN &&
snd_mixer_selem_has_playback_channel(elem, control_channels[i][1])))
++count;
}
return count;
}
static unsigned int get_capture_controls_count(snd_mixer_elem_t *elem)
{
unsigned int count = 0;
unsigned int i;
int has_vol, has_sw;
has_vol = snd_mixer_selem_has_capture_volume(elem);
has_sw = snd_mixer_selem_has_capture_switch(elem);
if ((!has_vol && !has_sw) ||
(view_mode == VIEW_MODE_ALL && has_merged_cswitch(elem)))
return 0;
if ((!has_vol || snd_mixer_selem_has_capture_volume_joined(elem)) &&
(!has_sw || snd_mixer_selem_has_capture_switch_joined(elem)))
return 1;
for (i = 0; i < ARRAY_SIZE(control_channels); ++i) {
if (snd_mixer_selem_has_capture_channel(elem, control_channels[i][0]) ||
(control_channels[i][1] != SND_MIXER_SCHN_UNKNOWN &&
snd_mixer_selem_has_capture_channel(elem, control_channels[i][1])))
++count;
}
return count;
}
static unsigned int get_controls_count_for_elem(snd_mixer_elem_t *elem)
{
unsigned int p, c;
if (snd_mixer_elem_get_type(elem) != SND_MIXER_ELEM_SIMPLE)
return 0;
if (snd_mixer_selem_is_enumerated(elem)) {
switch (view_mode) {
case VIEW_MODE_PLAYBACK:
return snd_mixer_selem_is_enum_capture(elem) ? 0 : 1;
case VIEW_MODE_CAPTURE:
return snd_mixer_selem_is_enum_capture(elem) ? 1 : 0;
case VIEW_MODE_ALL:
default:
return 1;
}
}
switch (view_mode) {
case VIEW_MODE_PLAYBACK:
return get_playback_controls_count(elem);
case VIEW_MODE_CAPTURE:
return get_capture_controls_count(elem);
case VIEW_MODE_ALL:
default:
p = get_playback_controls_count(elem);
c = get_capture_controls_count(elem);
return has_merged_cswitch(elem) ? p : p + c;
}
}
static void create_name(struct control *control)
{
unsigned int index;
char *s;
index = snd_mixer_selem_get_index(control->elem);
if (index > 0)
control->name = casprintf("%s %u", snd_mixer_selem_get_name(control->elem), index);
else
control->name = cstrdup(snd_mixer_selem_get_name(control->elem));
while ((s = strstr(control->name, "IEC958")) != NULL)
memcpy(s, "S/PDIF", 6);
}
static unsigned int create_controls_for_elem(snd_mixer_elem_t *elem, struct control *control)
{
unsigned int count = 0;
unsigned int i;
unsigned int multich_flag;
unsigned int enum_index;
struct control *front_control = NULL;
bool has_pvol, has_psw;
bool has_cvol, has_csw;
bool has_channel[LAST_SUPPORTED_CHANNEL + 1];
bool merged_cswitch;
bool has_ch0, has_ch1;
if (snd_mixer_elem_get_type(elem) != SND_MIXER_ELEM_SIMPLE)
return 0;
if (snd_mixer_selem_is_enumerated(elem)) {
if ((view_mode == VIEW_MODE_PLAYBACK && snd_mixer_selem_is_enum_capture(elem)) ||
(view_mode == VIEW_MODE_CAPTURE && !snd_mixer_selem_is_enum_capture(elem)))
return 0;
control->elem = elem;
control->flags = TYPE_ENUM;
control->enum_channel_bits = 0;
for (i = 0; i <= SND_MIXER_SCHN_LAST; ++i)
if (snd_mixer_selem_get_enum_item(control->elem, (snd_mixer_selem_channel_id_t)i, &enum_index) >= 0)
control->enum_channel_bits |= 1 << i;
if (snd_mixer_selem_is_active(control->elem))
control->flags |= IS_ACTIVE;
create_name(control);
return 1;
}
has_pvol = snd_mixer_selem_has_playback_volume(elem);
has_psw = snd_mixer_selem_has_playback_switch(elem);
has_cvol = snd_mixer_selem_has_capture_volume(elem);
has_csw = snd_mixer_selem_has_capture_switch(elem);
merged_cswitch = view_mode == VIEW_MODE_ALL && has_merged_cswitch(elem);
if (view_mode != VIEW_MODE_CAPTURE && (has_pvol || has_psw)) {
if ((!has_pvol || snd_mixer_selem_has_playback_volume_joined(elem)) &&
(!has_psw || snd_mixer_selem_has_playback_switch_joined(elem))) {
control->elem = elem;
if (has_pvol) {
control->flags |= TYPE_PVOLUME | HAS_VOLUME_0;
control->volume_channels[0] = 0;
}
if (has_psw) {
control->flags |= TYPE_PSWITCH | HAS_PSWITCH_0;
control->pswitch_channels[0] = 0;
}
if (merged_cswitch) {
control->flags |= TYPE_CSWITCH;
if (snd_mixer_selem_has_capture_switch_joined(elem)) {
control->flags |= HAS_CSWITCH_0;
control->cswitch_channels[0] = 0;
} else {
if (snd_mixer_selem_has_capture_channel(elem, control_channels[0][0])) {
control->flags |= HAS_CSWITCH_0;
control->cswitch_channels[0] = control_channels[0][0];
}
if (control_channels[0][1] != SND_MIXER_SCHN_UNKNOWN &&
snd_mixer_selem_has_capture_channel(elem, control_channels[0][1])) {
control->flags |= HAS_CSWITCH_1;
control->cswitch_channels[1] = control_channels[0][1];
}
}
if ((control->flags & (HAS_CSWITCH_0 | HAS_CSWITCH_1)) == HAS_CSWITCH_1) {
control->flags ^= HAS_CSWITCH_0 | HAS_CSWITCH_1;
control->cswitch_channels[0] = control->cswitch_channels[1];
}
}
if (snd_mixer_selem_is_active(control->elem))
control->flags |= IS_ACTIVE;
create_name(control);
++control;
++count;
} else {
multich_flag = 0;
for (i = 0; i < ARRAY_SIZE(supported_channels); ++i)
has_channel[supported_channels[i]] =
snd_mixer_selem_has_playback_channel(elem, supported_channels[i]);
for (i = 0; i < ARRAY_SIZE(control_channels); ++i) {
has_ch0 = has_channel[control_channels[i][0]];
has_ch1 = control_channels[i][1] != SND_MIXER_SCHN_UNKNOWN &&
has_channel[control_channels[i][1]];
if (!has_ch0 && !has_ch1)
continue;
control->elem = elem;
if (has_pvol) {
control->flags |= TYPE_PVOLUME;
if (snd_mixer_selem_has_playback_volume_joined(elem)) {
control->flags |= HAS_VOLUME_0;
control->volume_channels[0] = 0;
} else {
if (has_ch0) {
control->flags |= HAS_VOLUME_0;
control->volume_channels[0] = control_channels[i][0];
}
if (has_ch1) {
control->flags |= HAS_VOLUME_1;
control->volume_channels[1] = control_channels[i][1];
}
}
}
if (has_psw) {
control->flags |= TYPE_PSWITCH;
if (snd_mixer_selem_has_playback_switch_joined(elem)) {
control->flags |= HAS_PSWITCH_0;
control->pswitch_channels[0] = 0;
} else {
if (has_ch0) {
control->flags |= HAS_PSWITCH_0;
control->pswitch_channels[0] = control_channels[i][0];
}
if (has_ch1) {
control->flags |= HAS_PSWITCH_1;
control->pswitch_channels[1] = control_channels[i][1];
}
}
}
if (merged_cswitch) {
control->flags |= TYPE_CSWITCH;
if (snd_mixer_selem_has_capture_switch_joined(elem)) {
control->flags |= HAS_CSWITCH_0;
control->cswitch_channels[0] = 0;
} else {
if (snd_mixer_selem_has_capture_channel(elem, control_channels[i][0])) {
control->flags |= HAS_CSWITCH_0;
control->cswitch_channels[0] = control_channels[i][0];
}
if (control_channels[i][1] != SND_MIXER_SCHN_UNKNOWN &&
snd_mixer_selem_has_capture_channel(elem, control_channels[i][1])) {
control->flags |= HAS_CSWITCH_1;
control->cswitch_channels[1] = control_channels[i][1];
}
}
}
if ((control->flags & (HAS_VOLUME_0 | HAS_VOLUME_1)) == HAS_VOLUME_1) {
control->flags ^= HAS_VOLUME_0 | HAS_VOLUME_1;
control->volume_channels[0] = control->volume_channels[1];
}
if ((control->flags & (HAS_PSWITCH_0 | HAS_PSWITCH_1)) == HAS_PSWITCH_1) {
control->flags ^= HAS_PSWITCH_0 | HAS_PSWITCH_1;
control->pswitch_channels[0] = control->pswitch_channels[1];
}
if ((control->flags & (HAS_CSWITCH_0 | HAS_CSWITCH_1)) == HAS_CSWITCH_1) {
control->flags ^= HAS_CSWITCH_0 | HAS_CSWITCH_1;
control->cswitch_channels[0] = control->cswitch_channels[1];
}
if (snd_mixer_selem_is_active(control->elem))
control->flags |= IS_ACTIVE;
create_name(control);
if (i == 0)
front_control = control;
else {
front_control->flags |= IS_MULTICH | 0;
control->flags |= IS_MULTICH | i;
}
++control;
++count;
}
}
}
if (view_mode != VIEW_MODE_PLAYBACK && (has_cvol || has_csw) && !merged_cswitch) {
if ((!has_cvol || snd_mixer_selem_has_capture_volume_joined(elem)) &&
(!has_csw || snd_mixer_selem_has_capture_switch_joined(elem))) {
control->elem = elem;
if (has_cvol) {
control->flags |= TYPE_CVOLUME | HAS_VOLUME_0;
control->volume_channels[0] = 0;
}
if (has_csw) {
control->flags |= TYPE_CSWITCH | HAS_CSWITCH_0;
control->cswitch_channels[0] = 0;
}
if (snd_mixer_selem_is_active(control->elem))
control->flags |= IS_ACTIVE;
create_name(control);
++control;
++count;
} else {
for (i = 0; i < ARRAY_SIZE(supported_channels); ++i)
has_channel[supported_channels[i]] =
snd_mixer_selem_has_capture_channel(elem, supported_channels[i]);
for (i = 0; i < ARRAY_SIZE(control_channels); ++i) {
has_ch0 = has_channel[control_channels[i][0]];
has_ch1 = control_channels[i][1] != SND_MIXER_SCHN_UNKNOWN &&
has_channel[control_channels[i][1]];
if (!has_ch0 && !has_ch1)
continue;
control->elem = elem;
if (has_cvol) {
control->flags |= TYPE_CVOLUME;
if (snd_mixer_selem_has_capture_volume_joined(elem)) {
control->flags |= HAS_VOLUME_0;
control->volume_channels[0] = 0;
} else {
if (has_ch0) {
control->flags |= HAS_VOLUME_0;
control->volume_channels[0] = control_channels[i][0];
}
if (has_ch1) {
control->flags |= HAS_VOLUME_1;
control->volume_channels[1] = control_channels[i][1];
}
}
}
if (has_csw) {
control->flags |= TYPE_CSWITCH;
if (snd_mixer_selem_has_capture_switch_joined(elem)) {
control->flags |= HAS_CSWITCH_0;
control->cswitch_channels[0] = 0;
} else {
if (has_ch0) {
control->flags |= HAS_CSWITCH_0;
control->cswitch_channels[0] = control_channels[i][0];
}
if (has_ch1) {
control->flags |= HAS_CSWITCH_1;
control->cswitch_channels[1] = control_channels[i][1];
}
}
}
if ((control->flags & (HAS_VOLUME_0 | HAS_VOLUME_1)) == HAS_VOLUME_1) {
control->flags ^= HAS_VOLUME_0 | HAS_VOLUME_1;
control->volume_channels[0] = control->volume_channels[1];
}
if ((control->flags & (HAS_CSWITCH_0 | HAS_CSWITCH_1)) == HAS_CSWITCH_1) {
control->flags ^= HAS_CSWITCH_0 | HAS_CSWITCH_1;
control->cswitch_channels[0] = control->cswitch_channels[1];
}
if (snd_mixer_selem_is_active(control->elem))
control->flags |= IS_ACTIVE;
create_name(control);
if (i == 0)
front_control = control;
else {
front_control->flags |= IS_MULTICH | 0;
control->flags |= IS_MULTICH | i;
}
++control;
++count;
}
}
}
return count;
}
static void search_for_focus_control(void)
{
snd_mixer_elem_t *elem;
unsigned int i;
elem = snd_mixer_find_selem(mixer, current_selem_id);
if (elem)
for (i = 0; i < controls_count; ++i)
if (controls[i].elem == elem) {
focus_control_index = i;
for (;;) {
++i;
if (i >= controls_count || controls[i].elem != elem)
return;
if (controls[i].flags == current_control_flags) {
focus_control_index = i;
return;
}
}
}
focus_control_index = 0;
}
void free_controls(void)
{
unsigned int i;
for (i = 0; i < controls_count; ++i)
free(controls[i].name);
free(controls);
controls = NULL;
controls_count = 0;
}
void create_controls(void)
{
snd_mixer_elem_t *elem;
struct control *control;
free_controls();
for (elem = snd_mixer_first_elem(mixer);
elem;
elem = snd_mixer_elem_next(elem))
controls_count += get_controls_count_for_elem(elem);
if (controls_count > 0) {
controls = ccalloc(controls_count, sizeof *controls);
control = controls;
for (elem = snd_mixer_first_elem(mixer);
elem;
elem = snd_mixer_elem_next(elem))
control += create_controls_for_elem(elem, control);
assert(control == controls + controls_count);
}
compute_controls_layout();
display_view_mode();
search_for_focus_control();
refocus_control();
}
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