mirrors/alsa-lib
1
0
Fork 0
mirror of https://github.com/alsa-project/alsa-lib.git synced 2025-10-29 05:40:25 -04:00
Code Issues Projects Releases Packages Wiki Activity Actions

Mixer v2.0 merged to the main CVS tree...

Browse source
This commit is contained in:
Jaroslav Kysela 1999-05-02 16:21:30 +00:00
parent 3f541735e3
commit a5b307a711
10 changed files with 536 additions and 167 deletions
Download patch file Download diff file Expand all files Collapse all files

4
acinclude.m4
View file

@ -16,7 +16,7 @@ void main(void)
#if !defined(SND_PROTOCOL_VERSION) || !defined(SND_PROTOCOL_UNCOMPATIBLE)
#error not found
#else
#if !defined(SND_MIXER_IOCTL_CHANNEL_IREAD)
#if !defined(SND_MIXER_IOCTL_ELEMENTS)
#error wrong version
#endif
exit(0);
@ -25,7 +25,7 @@ void main(void)
],
AC_MSG_RESULT(present),
[AC_MSG_RESULT(not found or wrong version);
AC_MSG_ERROR([Install alsa-driver v0.3.0pre1+ package first...])]
AC_MSG_ERROR([Install alsa-driver v0.3.0pre5+ package first...])]
)
CFLAGS="$OLD_CFLAGS"
])

8
include/control.h
View file

@ -14,6 +14,14 @@ int snd_cards(void);
unsigned int snd_cards_mask(void);
int snd_card_name(const char *name);
int snd_defaults_card(void);
int snd_defaults_mixer_card(void);
int snd_defaults_mixer_device(void);
int snd_defaults_pcm_card(void);
int snd_defaults_pcm_device(void);
int snd_defaults_rawmidi_card(void);
int snd_defaults_rawmidi_device(void);
int snd_ctl_open(void **handle, int card);
int snd_ctl_close(void *handle);
int snd_ctl_file_descriptor(void *handle);

41
include/mixer.h
View file

@ -6,12 +6,12 @@
****************************************************************************/
typedef struct snd_mixer_callbacks {
void *private_data; /* should be used by application */
void (*channel_was_changed) (void *private_data, int channel);
void (*output_channel_was_changed) (void *private_data, int channel);
void (*input_channel_was_changed) (void *private_data, int channel);
void (*switch_was_changed) (void *private_data, int switchn);
void *reserved[15]; /* reserved for future use - must be NULL!!! */
void *private_data; /* should be used by an application */
void (*rebuild) (void *private_data);
void (*element) (void *private_data, int cmd, snd_mixer_eid_t *eid);
void (*group) (void *private_data, int cmd, snd_mixer_gid_t *gid);
void (*xswitch) (void *private_data, int cmd, snd_switch_list_item_t *item);
void *reserved[27]; /* reserved for the future use - must be NULL!!! */
} snd_mixer_callbacks_t;
#ifdef __cplusplus
@ -21,24 +21,29 @@ extern "C" {
int snd_mixer_open(void **handle, int card, int device);
int snd_mixer_close(void *handle);
int snd_mixer_file_descriptor(void *handle);
int snd_mixer_channels(void *handle);
int snd_mixer_info(void *handle, snd_mixer_info_t * info);
int snd_mixer_exact_mode(void *handle, int enable);
int snd_mixer_channel(void *handle, const char *channel_id);
int snd_mixer_channel_info(void *handle, int channel, snd_mixer_channel_info_t * info);
int snd_mixer_channel_output_info(void *handle, int channel, snd_mixer_channel_direction_info_t * info);
int snd_mixer_channel_input_info(void *handle, int channel, snd_mixer_channel_direction_info_t * info);
int snd_mixer_channel_read(void *handle, int channel, snd_mixer_channel_t * data);
int snd_mixer_channel_write(void *handle, int channel, snd_mixer_channel_t * data);
int snd_mixer_channel_output_read(void *handle, int channel, snd_mixer_channel_direction_t * data);
int snd_mixer_channel_output_write(void *handle, int channel, snd_mixer_channel_direction_t * data);
int snd_mixer_channel_input_read(void *handle, int channel, snd_mixer_channel_direction_t * data);
int snd_mixer_channel_input_write(void *handle, int channel, snd_mixer_channel_direction_t * data);
int snd_mixer_elements(void *handle, snd_mixer_elements_t * elements);
int snd_mixer_routes(void *handle, snd_mixer_routes_t * routes);
int snd_mixer_groups(void *handle, snd_mixer_groups_t * groups);
int snd_mixer_group(void *handle, snd_mixer_group_t * group);
int snd_mixer_element_info(void *handle, snd_mixer_element_info_t * info);
int snd_mixer_element_read(void *handle, snd_mixer_element_t * element);
int snd_mixer_element_write(void *handle, snd_mixer_element_t * element);
int snd_mixer_switch_list(void *handle, snd_switch_list_t * list);
int snd_mixer_switch_read(void *handle, snd_switch_t * sw);
int snd_mixer_switch_write(void *handle, snd_switch_t * sw);
int snd_mixer_read(void *handle, snd_mixer_callbacks_t * callbacks);
void snd_mixer_set_bit(unsigned int *bitmap, int bit, int val);
int snd_mixer_get_bit(unsigned int *bitmap, int bit);
int snd_mixer_element_has_info(snd_mixer_eid_t *eid);
int snd_mixer_element_info_build(void *handle, snd_mixer_element_info_t * info);
int snd_mixer_element_info_free(snd_mixer_element_info_t * info);
int snd_mixer_element_has_control(snd_mixer_eid_t *eid);
int snd_mixer_element_build(void *handle, snd_mixer_element_t * element);
int snd_mixer_element_free(snd_mixer_element_t * element);
#ifdef __cplusplus
}
#endif

2
src/control/Makefile.am
View file

@ -1,6 +1,6 @@
EXTRA_LTLIBRARIES = libcontrol.la
libcontrol_la_SOURCES = cards.c control.c
libcontrol_la_SOURCES = cards.c control.c defaults.c
all: libcontrol.la

108
src/control/defaults.c Normal file
View file

@ -0,0 +1,108 @@
/*
* Control Interface - defaults
* Copyright (c) 1998 by Jaroslav Kysela <perex@jcu.cz>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdlib.h>
#include <errno.h>
#include "asoundlib.h"
static int defaults_card(const char *env)
{
char *e;
e = getenv(env);
if (!e)
return -ENOENT;
return snd_card_name(e);
}
static int defaults_device(const char *env)
{
char *e;
int dev;
e = getenv(env);
if (e) {
dev = atoi(env);
if (dev >= 0 && dev < 1024 * 1024)
return dev;
}
return 0;
}
int snd_defaults_card(void)
{
int result;
unsigned int mask;
result = defaults_card("ALSA_CARD");
if (result >= 0)
return result;
mask = snd_cards_mask();
for (result = 0; result < 31; result++)
if (mask & (1 << result))
return result;
return -ENOENT;
}
int snd_defaults_mixer_card(void)
{
int result;
result = defaults_card("ALSA_MIXER_CARD");
if (result >= 0)
return result;
return snd_defaults_card();
}
int snd_defaults_mixer_device(void)
{
return defaults_device("ALSA_MIXER_DEVICE");
}
int snd_defaults_pcm_card(void)
{
int result;
result = defaults_card("ALSA_PCM_CARD");
if (result >= 0)
return result;
return snd_defaults_card();
}
int snd_defaults_pcm_device(void)
{
return defaults_device("ALSA_PCM_DEVICE");
}
int snd_defaults_rawmidi_card(void)
{
int result;
result = defaults_card("ALSA_PCM_CARD");
if (result >= 0)
return result;
return snd_defaults_card();
}
int snd_defaults_rawmidi_device(void)
{
return defaults_device("ALSA_RAWMIDI_DEVICE");
}

2
src/mixer/Makefile.am
View file

@ -1,6 +1,6 @@
EXTRA_LTLIBRARIES=libmixer.la
libmixer_la_SOURCES = mixer.c
libmixer_la_SOURCES = mixer.c elements.c
all: libmixer.la

314
src/mixer/elements.c Normal file
View file

@ -0,0 +1,314 @@
/*
* Mixer Interface - elements
* Copyright (c) 1999 by Jaroslav Kysela <perex@jcu.cz>
*
*
* This library is free software; you can redistribute it and/or modify
* it under the terms of the GNU Library 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 Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
*/
#include <stdlib.h>
#include <errno.h>
#include "asoundlib.h"
static inline void safe_free(void **ptr)
{
if (*ptr)
free(*ptr);
*ptr = NULL;
}
int snd_mixer_element_has_info(snd_mixer_eid_t *eid)
{
if (!eid)
return -EINVAL;
switch (eid->type) {
case SND_MIXER_ETYPE_INPUT:
case SND_MIXER_ETYPE_OUTPUT:
case SND_MIXER_ETYPE_CAPTURE:
case SND_MIXER_ETYPE_PLAYBACK:
case SND_MIXER_ETYPE_ADC:
case SND_MIXER_ETYPE_DAC:
case SND_MIXER_ETYPE_SWITCH3:
case SND_MIXER_ETYPE_VOLUME1:
case SND_MIXER_ETYPE_VOLUME2:
case SND_MIXER_ETYPE_ACCU1:
case SND_MIXER_ETYPE_ACCU2:
case SND_MIXER_ETYPE_ACCU3:
case SND_MIXER_ETYPE_MUX1:
case SND_MIXER_ETYPE_MUX2:
case SND_MIXER_ETYPE_TONE_CONTROL1:
case SND_MIXER_ETYPE_3D_EFFECT1:
case SND_MIXER_ETYPE_PRE_EFFECT1:
return 1;
}
return 0;
}
int snd_mixer_element_info_build(void *handle, snd_mixer_element_info_t *element)
{
int err;
if (!handle || !element)
return -EINVAL;
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
switch (element->eid.type) {
case SND_MIXER_ETYPE_INPUT:
case SND_MIXER_ETYPE_OUTPUT:
element->data.io.voices_size = element->data.io.voices_over;
element->data.io.voices = element->data.io.voices_over = 0;
element->data.io.pvoices = (snd_mixer_voice_t *)malloc(element->data.io.voices_size * sizeof(snd_mixer_voice_t));
if (!element->data.io.pvoices)
return -ENOMEM;
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_CAPTURE:
case SND_MIXER_ETYPE_PLAYBACK:
element->data.pcm.devices_size = element->data.pcm.devices_over;
element->data.pcm.devices = element->data.pcm.devices_over = 0;
element->data.pcm.pdevices = (int *)malloc(element->data.pcm.devices_size * sizeof(int));
if (!element->data.pcm.pdevices)
return -ENOMEM;
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_SWITCH3:
element->data.switch3.voices_size = element->data.switch3.voices_over;
element->data.switch3.voices = element->data.switch3.voices_over = 0;
element->data.switch3.pvoices = (snd_mixer_voice_t *)malloc(element->data.switch3.voices_size * sizeof(snd_mixer_voice_t));
if (!element->data.switch3.pvoices)
return -ENOMEM;
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_VOLUME1:
element->data.volume1.range_size = element->data.volume1.range_over;
element->data.volume1.range = element->data.volume1.range_over = 0;
element->data.volume1.prange = (struct snd_mixer_element_volume1_range *)malloc(element->data.volume1.range_size * sizeof(struct snd_mixer_element_volume1_range));
if (!element->data.volume1.prange)
return -ENOMEM;
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_VOLUME2:
element->data.volume2.svoices_size = element->data.volume2.svoices_over;
element->data.volume2.svoices = element->data.volume2.svoices_over = 0;
element->data.volume2.psvoices = (snd_mixer_voice_t *)malloc(element->data.volume2.svoices_size * sizeof(snd_mixer_voice_t));
if (!element->data.volume2.psvoices)
return -ENOMEM;
element->data.volume2.range_size = element->data.volume2.range_over;
element->data.volume2.range = element->data.volume2.range_over = 0;
element->data.volume2.prange = (struct snd_mixer_element_volume2_range *)malloc(element->data.volume2.range_size * sizeof(struct snd_mixer_element_volume2_range));
if (!element->data.volume1.prange) {
safe_free((void **)&element->data.volume2.psvoices);
return -ENOMEM;
}
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_ACCU3:
element->data.accu3.range_size = element->data.accu3.range_over;
element->data.accu3.range = element->data.accu3.range_over = 0;
element->data.accu3.prange = (struct snd_mixer_element_accu3_range *)malloc(element->data.accu3.range_size * sizeof(struct snd_mixer_element_accu3_range));
if (!element->data.accu3.prange)
return -ENOMEM;
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_PRE_EFFECT1:
element->data.peffect1.items_size = element->data.peffect1.items_over;
element->data.peffect1.items = element->data.peffect1.items_over = 0;
element->data.peffect1.pitems = (struct snd_mixer_element_pre_effect1_info_item *)malloc(element->data.peffect1.items_size * sizeof(struct snd_mixer_element_pre_effect1_info_item));
if (!element->data.peffect1.pitems)
return -ENOMEM;
element->data.peffect1.parameters_size = element->data.peffect1.parameters_over;
element->data.peffect1.parameters = element->data.peffect1.parameters_over = 0;
element->data.peffect1.pparameters = (struct snd_mixer_element_pre_effect1_info_parameter *)malloc(element->data.peffect1.parameters_size * sizeof(struct snd_mixer_element_pre_effect1_info_parameter));
if (!element->data.peffect1.pparameters) {
safe_free((void **)&element->data.peffect1.pitems);
return -ENOMEM;
}
if ((err = snd_mixer_element_info(handle, element)) < 0)
return err;
break;
}
return 0;
}
int snd_mixer_element_info_free(snd_mixer_element_info_t *element)
{
if (!element)
return -EINVAL;
switch (element->eid.type) {
case SND_MIXER_ETYPE_INPUT:
case SND_MIXER_ETYPE_OUTPUT:
safe_free((void **)&element->data.io.pvoices);
break;
case SND_MIXER_ETYPE_CAPTURE:
case SND_MIXER_ETYPE_PLAYBACK:
safe_free((void **)&element->data.pcm.pdevices);
break;
case SND_MIXER_ETYPE_SWITCH3:
safe_free((void **)&element->data.switch3.pvoices);
break;
case SND_MIXER_ETYPE_VOLUME1:
safe_free((void **)&element->data.volume1.prange);
break;
case SND_MIXER_ETYPE_VOLUME2:
safe_free((void **)&element->data.volume2.psvoices);
safe_free((void **)&element->data.volume1.prange);
break;
case SND_MIXER_ETYPE_ACCU3:
safe_free((void **)&element->data.accu3.prange);
break;
case SND_MIXER_ETYPE_PRE_EFFECT1:
safe_free((void **)&element->data.peffect1.pitems);
safe_free((void **)&element->data.peffect1.pparameters);
break;
}
return 0;
}
int snd_mixer_element_has_control(snd_mixer_eid_t *eid)
{
if (!eid)
return -EINVAL;
switch (eid->type) {
case SND_MIXER_ETYPE_SWITCH1:
case SND_MIXER_ETYPE_SWITCH2:
case SND_MIXER_ETYPE_SWITCH3:
case SND_MIXER_ETYPE_VOLUME1:
case SND_MIXER_ETYPE_VOLUME2:
case SND_MIXER_ETYPE_ACCU3:
case SND_MIXER_ETYPE_MUX1:
case SND_MIXER_ETYPE_MUX2:
case SND_MIXER_ETYPE_TONE_CONTROL1:
case SND_MIXER_ETYPE_3D_EFFECT1:
case SND_MIXER_ETYPE_PRE_EFFECT1:
return 1;
}
return 0;
}
int snd_mixer_element_build(void *handle, snd_mixer_element_t *element)
{
int err;
if (!handle || !element)
return -EINVAL;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
switch (element->eid.type) {
case SND_MIXER_ETYPE_SWITCH1:
element->data.switch1.sw_size = element->data.switch1.sw_over;
element->data.switch1.sw = element->data.switch1.sw_over = 0;
element->data.switch1.psw = (unsigned int *)malloc(((element->data.switch1.sw_size + 31) / 32) * sizeof(unsigned int));
if (!element->data.switch1.psw)
return -ENOMEM;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_SWITCH3:
element->data.switch3.rsw_size = element->data.switch3.rsw_over;
element->data.switch3.rsw = element->data.switch3.rsw_over = 0;
element->data.switch3.prsw = (unsigned int *)malloc(((element->data.switch3.rsw_size + 31) / 32) * sizeof(unsigned int));
if (!element->data.switch3.prsw)
return -ENOMEM;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_VOLUME1:
element->data.volume1.voices_size = element->data.volume1.voices_over;
element->data.volume1.voices = element->data.volume1.voices_over = 0;
element->data.volume1.pvoices = (int *)malloc(element->data.volume1.voices_size * sizeof(int));
if (!element->data.volume1.pvoices)
return -ENOMEM;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_VOLUME2:
element->data.volume2.avoices_size = element->data.volume2.avoices_over;
element->data.volume2.avoices = element->data.volume2.avoices_over = 0;
element->data.volume2.pavoices = (int *)malloc(element->data.volume2.avoices_size * sizeof(int));
if (!element->data.volume2.pavoices)
return -ENOMEM;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_ACCU3:
element->data.accu3.voices_size = element->data.accu3.voices_over;
element->data.accu3.voices = element->data.accu3.voices_over = 0;
element->data.accu3.pvoices = (int *)malloc(element->data.accu3.voices_size * sizeof(int));
if (!element->data.accu3.pvoices)
return -ENOMEM;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_MUX1:
element->data.mux1.output_size = element->data.mux1.output_over;
element->data.mux1.output = element->data.mux1.output_over = 0;
element->data.mux1.poutput = (snd_mixer_eid_t *)malloc(element->data.mux1.output_size * sizeof(snd_mixer_eid_t));
if (!element->data.mux1.poutput)
return -ENOMEM;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
break;
case SND_MIXER_ETYPE_PRE_EFFECT1:
if (element->data.peffect1.item < 0) {
element->data.peffect1.parameters_size = element->data.peffect1.parameters_over;
element->data.peffect1.parameters = element->data.peffect1.parameters_over = 0;
element->data.peffect1.pparameters = (int *)malloc(element->data.peffect1.parameters_size * sizeof(int));
if (!element->data.peffect1.pparameters)
return -ENOMEM;
if ((err = snd_mixer_element_read(handle, element)) < 0)
return err;
}
break;
}
return 0;
}
int snd_mixer_element_free(snd_mixer_element_t *element)
{
if (!element)
return -EINVAL;
switch (element->eid.type) {
case SND_MIXER_ETYPE_SWITCH1:
safe_free((void **)&element->data.switch1.psw);
break;
case SND_MIXER_ETYPE_SWITCH3:
safe_free((void **)&element->data.switch3.prsw);
break;
case SND_MIXER_ETYPE_VOLUME1:
safe_free((void **)&element->data.volume1.pvoices);
break;
case SND_MIXER_ETYPE_VOLUME2:
safe_free((void **)&element->data.volume2.pavoices);
break;
case SND_MIXER_ETYPE_ACCU3:
safe_free((void **)&element->data.accu3.pvoices);
break;
case SND_MIXER_ETYPE_MUX1:
safe_free((void **)&element->data.mux1.poutput);
break;
case SND_MIXER_ETYPE_PRE_EFFECT1:
if (element->data.peffect1.item < 0)
safe_free((void **)&element->data.peffect1.pparameters);
break;
}
return 0;
}

196
src/mixer/mixer.c
View file

@ -29,7 +29,7 @@
#include "asoundlib.h"
#define SND_FILE_MIXER "/dev/snd/mixerC%iD%i"
#define SND_MIXER_VERSION_MAX SND_PROTOCOL_VERSION( 1, 1, 0 )
#define SND_MIXER_VERSION_MAX SND_PROTOCOL_VERSION(2, 0, 0)
typedef struct {
int card;
@ -96,19 +96,6 @@ int snd_mixer_file_descriptor(void *handle)
return mixer->fd;
}
int snd_mixer_channels(void *handle)
{
snd_mixer_t *mixer;
int result;
mixer = (snd_mixer_t *) handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNELS, &result) < 0)
return -errno;
return result;
}
int snd_mixer_info(void *handle, snd_mixer_info_t * info)
{
snd_mixer_t *mixer;
@ -121,156 +108,87 @@ int snd_mixer_info(void *handle, snd_mixer_info_t * info)
return 0;
}
int snd_mixer_exact_mode(void *handle, int enable)
int snd_mixer_elements(void *handle, snd_mixer_elements_t * elements)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer)
return -EINVAL;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_EXACT, &enable) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENTS, elements) < 0)
return -errno;
return 0;
}
int snd_mixer_channel(void *handle, const char *channel_id)
{
snd_mixer_t *mixer;
snd_mixer_channel_info_t info;
int idx, channels, err;
mixer = (snd_mixer_t *) handle;
if (!mixer || !channel_id)
return -EINVAL;
/* bellow implementation isn't optimized for speed */
/* info about channels should be cached in the snd_mixer_t structure */
if ((channels = snd_mixer_channels(handle)) < 0)
return channels;
for (idx = 0; idx < channels; idx++) {
if ((err = snd_mixer_channel_info(handle, idx, &info)) < 0)
return err;
if (!strncmp(channel_id, info.name, sizeof(info.name)))
return idx;
}
return -EINVAL;
}
int snd_mixer_channel_info(void *handle, int channel, snd_mixer_channel_info_t * info)
int snd_mixer_routes(void *handle, snd_mixer_routes_t * routes)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !info || channel < 0)
if (!mixer)
return -EINVAL;
info->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_INFO, info) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ROUTES, routes) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_output_info(void *handle, int channel, snd_mixer_channel_direction_info_t * info)
int snd_mixer_groups(void *handle, snd_mixer_groups_t * groups)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !info || channel < 0)
if (!mixer)
return -EINVAL;
info->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_OINFO, info) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_GROUPS, groups) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_input_info(void *handle, int channel, snd_mixer_channel_direction_info_t * info)
int snd_mixer_group(void *handle, snd_mixer_group_t * group)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !info || channel < 0)
if (!mixer)
return -EINVAL;
info->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_IINFO, info) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_GROUP, group) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_read(void *handle, int channel, snd_mixer_channel_t * data)
int snd_mixer_element_info(void *handle, snd_mixer_element_info_t * info)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data || channel < 0)
if (!mixer)
return -EINVAL;
bzero(data, sizeof(snd_mixer_channel_t));
data->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_READ, data) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_INFO, info) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_write(void *handle, int channel, snd_mixer_channel_t * data)
int snd_mixer_element_read(void *handle, snd_mixer_element_t * element)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data)
if (!mixer)
return -EINVAL;
data->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_WRITE, data) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_READ, element) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_output_read(void *handle, int channel, snd_mixer_channel_direction_t * data)
int snd_mixer_element_write(void *handle, snd_mixer_element_t * element)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data || channel < 0)
if (!mixer)
return -EINVAL;
bzero(data, sizeof(snd_mixer_channel_t));
data->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_OREAD, data) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_output_write(void *handle, int channel, snd_mixer_channel_direction_t * data)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data || channel < 0)
return -EINVAL;
data->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_OWRITE, data) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_input_read(void *handle, int channel, snd_mixer_channel_direction_t * data)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data || channel < 0)
return -EINVAL;
bzero(data, sizeof(snd_mixer_channel_t));
data->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_IREAD, data) < 0)
return -errno;
return 0;
}
int snd_mixer_channel_input_write(void *handle, int channel, snd_mixer_channel_direction_t * data)
{
snd_mixer_t *mixer;
mixer = (snd_mixer_t *) handle;
if (!mixer || !data || channel < 0)
return -EINVAL;
data->channel = channel;
if (ioctl(mixer->fd, SND_MIXER_IOCTL_CHANNEL_IWRITE, data) < 0)
if (ioctl(mixer->fd, SND_MIXER_IOCTL_ELEMENT_WRITE, element) < 0)
return -errno;
return 0;
}
@ -314,40 +232,60 @@ int snd_mixer_switch_write(void *handle, snd_switch_t * sw)
int snd_mixer_read(void *handle, snd_mixer_callbacks_t * callbacks)
{
snd_mixer_t *mixer;
int idx, result, count;
unsigned int cmd, tmp;
unsigned char buffer[64];
int result, count;
snd_mixer_read_t r;
mixer = (snd_mixer_t *) handle;
if (!mixer)
return -EINVAL;
count = 0;
while ((result = read(mixer->fd, &buffer, sizeof(buffer))) > 0) {
if (result & 7)
while ((result = read(mixer->fd, &r, sizeof(r))) > 0) {
if (result != sizeof(r))
return -EIO;
if (!callbacks)
continue;
for (idx = 0; idx < result; idx += 8) {
cmd = *(unsigned int *) &buffer[idx];
tmp = *(unsigned int *) &buffer[idx + 4];
if (cmd == SND_MIXER_CHANGED &&
callbacks->channel_was_changed) {
callbacks->channel_was_changed(callbacks->private_data, (int) tmp);
}
if (cmd == SND_MIXER_OUTPUT_CHANGED &&
callbacks->output_channel_was_changed) {
callbacks->output_channel_was_changed(callbacks->private_data, (int) tmp);
}
if (cmd == SND_MIXER_INPUT_CHANGED &&
callbacks->input_channel_was_changed) {
callbacks->input_channel_was_changed(callbacks->private_data, (int) tmp);
}
if (cmd == SND_MIXER_SWITCH_CHANGED &&
callbacks->switch_was_changed) {
callbacks->switch_was_changed(callbacks->private_data, (int) tmp);
}
switch (r.cmd) {
case SND_MIXER_READ_REBUILD:
if (callbacks->rebuild)
callbacks->rebuild(callbacks->private_data);
break;
case SND_MIXER_READ_ELEMENT_VALUE:
case SND_MIXER_READ_ELEMENT_CHANGE:
case SND_MIXER_READ_ELEMENT_ROUTE:
case SND_MIXER_READ_ELEMENT_ADD:
case SND_MIXER_READ_ELEMENT_REMOVE:
if (callbacks->element)
callbacks->element(callbacks->private_data, r.cmd, &r.data.eid);
break;
case SND_MIXER_READ_GROUP_CHANGE:
case SND_MIXER_READ_GROUP_ADD:
case SND_MIXER_READ_GROUP_REMOVE:
if (callbacks->group)
callbacks->group(callbacks->private_data, r.cmd, &r.data.gid);
break;
case SND_MIXER_READ_SWITCH_VALUE:
case SND_MIXER_READ_SWITCH_CHANGE:
case SND_MIXER_READ_SWITCH_ADD:
case SND_MIXER_READ_SWITCH_REMOVE:
if (callbacks->xswitch)
callbacks->xswitch(callbacks->private_data, r.cmd, &r.data.switem);
break;
}
count += result >> 3; /* return only number of changes */
count++;
}
return result >= 0 ? count : -errno;
}
void snd_mixer_set_bit(unsigned int *bitmap, int bit, int val)
{
if (val) {
bitmap[bit >> 5] |= 1 << (bit & 31);
} else {
bitmap[bit >> 5] &= ~(1 << (bit & 31));
}
}
int snd_mixer_get_bit(unsigned int *bitmap, int bit)
{
return (bitmap[bit >> 5] & (1 << (bit & 31))) ? 1 : 0;
}

14
test/control.c
View file

@ -28,11 +28,9 @@ void main(void)
}
printf("Soundcard #%i:\n", idx + 1);
printf(" type - %i\n", info.type);
printf(" gcaps - 0x%x\n", info.gcaps);
printf(" lcaps - 0x%x\n", info.lcaps);
printf(" pcm devs - 0x%x\n", info.pcmdevs);
printf(" mixer devs - 0x%x\n", info.mixerdevs);
printf(" midi devs - 0x%x\n", info.mididevs);
printf(" pcm devs - %i\n", info.pcmdevs);
printf(" mixer devs - %i\n", info.mixerdevs);
printf(" midi devs - %i\n", info.mididevs);
memset(str, 0, sizeof(str));
strncpy(str, info.id, sizeof(info.id));
printf(" id - '%s'\n", str);
@ -57,8 +55,10 @@ void main(void)
continue;
}
printf(" type - %i\n", mixerinfo.type);
printf(" channels - %i\n", mixerinfo.channels);
printf(" caps - 0x%x\n", mixerinfo.caps);
printf(" elements - %i\n", mixerinfo.elements);
printf(" groups - %i\n", mixerinfo.groups);
printf(" switches - %i\n", mixerinfo.switches);
printf(" attribute - 0x%x\n", mixerinfo.attribute);
printf(" id - '%s'\n", mixerinfo.id);
printf(" name - '%s'\n", mixerinfo.name);
}

14
test/mixer.c
View file

@ -4,7 +4,7 @@
static void mixer_test(int card, int device)
{
int err, channels;
int err;
void *handle;
snd_mixer_info_t info;
@ -13,20 +13,16 @@ static void mixer_test(int card, int device)
return;
}
printf("Mixer %i/%i open ok...\n", card, device);
channels = snd_mixer_channels(handle);
if (channels < 0) {
printf("Mixer channels error: %s\n", snd_strerror(channels));
return;
}
printf(" Mixer have %i channel%s.\n", channels, channels > 1 ? "s" : "");
if ((err = snd_mixer_info(handle, &info)) < 0) {
printf("Mixer info error: %s\n", snd_strerror(err));
return;
}
printf(" Info:\n");
printf(" type - %i\n", info.type);
printf(" channels - %i\n", info.channels);
printf(" caps - 0x%x\n", info.caps);
printf(" elements - %i\n", info.elements);
printf(" groups - %i\n", info.groups);
printf(" switches - %i\n", info.switches);
printf(" attribute - 0x%x\n", info.attribute);
printf(" id - '%s'\n", info.id);
printf(" name - '%s'\n", info.name);
snd_mixer_close(handle);