/* tinymix.c

**

** Copyright 2011, The Android Open Source Project

**

** Redistribution and use in source and binary forms, with or without

** modification, are permitted provided that the following conditions are met:

** * Redistributions of source code must retain the above copyright

** notice, this list of conditions and the following disclaimer.

** * Redistributions in binary form must reproduce the above copyright

** notice, this list of conditions and the following disclaimer in the

** documentation and/or other materials provided with the distribution.

** * Neither the name of The Android Open Source Project nor the names of

** its contributors may be used to endorse or promote products derived

** from this software without specific prior written permission.

**

** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND

** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE

** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH

** DAMAGE.

*/

#include <tinyalsa/asoundlib.h>

#include <errno.h>

#include <stdio.h>

#include <stdlib.h>

#include <ctype.h>

#include <string.h>

#include <limits.h>

#include <errno.h>

static void tinymix_list_controls(struct mixer *mixer);

static void tinymix_detail_control(struct mixer *mixer, const char *control,

int print_all);

static void tinymix_set_value(struct mixer *mixer, const char *control,

char **values, unsigned int num_values);

static void tinymix_print_enum(struct mixer_ctl *ctl, int print_all);

int main(int argc, char **argv)

{

struct mixer *mixer;

int card = 0;

if ((argc > 2) && (strcmp(argv[1], "-D") == 0)) {

argv++;

if (argv[1]) {

card = atoi(argv[1]);

argv++;

argc -= 2;

} else {

argc -= 1;

}

}

mixer = mixer_open(card);

if (!mixer) {

fprintf(stderr, "Failed to open mixer\n");

return EXIT_FAILURE;

}

if (argc == 1) {

printf("Mixer name: '%s'\n", mixer_get_name(mixer));

tinymix_list_controls(mixer);

} else if (argc == 2) {

tinymix_detail_control(mixer, argv[1], 1);

} else if (argc >= 3) {

tinymix_set_value(mixer, argv[1], &argv[2], argc - 2);

} else {

printf("Usage: tinymix [-D card] [control id] [value to set]\n");

}

mixer_close(mixer);

return 0;

}

static void tinymix_list_controls(struct mixer *mixer)

{

struct mixer_ctl *ctl;

const char *name, *type;

unsigned int num_ctls, num_values;

unsigned int i;

num_ctls = mixer_get_num_ctls(mixer);

printf("Number of controls: %d\n", num_ctls);

printf("ctl\ttype\tnum\t%-40s value\n", "name");

for (i = 0; i < num_ctls; i++) {

ctl = mixer_get_ctl(mixer, i);

name = mixer_ctl_get_name(ctl);

type = mixer_ctl_get_type_string(ctl);

num_values = mixer_ctl_get_num_values(ctl);

printf("%d\t%s\t%d\t%-40s", i, type, num_values, name);

tinymix_detail_control(mixer, name, 0);

}

}

static void tinymix_print_enum(struct mixer_ctl *ctl, int print_all)

{

unsigned int num_enums;

unsigned int i;

const char *string;

num_enums = mixer_ctl_get_num_enums(ctl);

for (i = 0; i < num_enums; i++) {

string = mixer_ctl_get_enum_string(ctl, i);

if (print_all)

printf("\t%s%s", mixer_ctl_get_value(ctl, 0) == (int)i ? ">" : "",

string);

else if (mixer_ctl_get_value(ctl, 0) == (int)i)

printf(" %-s", string);

}

}

static void tinymix_detail_control(struct mixer *mixer, const char *control,

int print_all)

{

struct mixer_ctl *ctl;

enum mixer_ctl_type type;

unsigned int num_values;

unsigned int i;

int min, max;

int ret;

char *buf = NULL;

if (isdigit(control[0]))

ctl = mixer_get_ctl(mixer, atoi(control));

else

ctl = mixer_get_ctl_by_name(mixer, control);

if (!ctl) {

fprintf(stderr, "Invalid mixer control\n");

return;

}

type = mixer_ctl_get_type(ctl);

num_values = mixer_ctl_get_num_values(ctl);

if ((type == MIXER_CTL_TYPE_BYTE) && (num_values > 0)) {

buf = calloc(1, num_values);

if (buf == NULL) {

fprintf(stderr, "Failed to alloc mem for bytes %d\n", num_values);

return;

}

ret = mixer_ctl_get_array(ctl, buf, num_values);

if (ret < 0) {

fprintf(stderr, "Failed to mixer_ctl_get_array\n");

free(buf);

return;

}

}

if (print_all)

printf("%s:", mixer_ctl_get_name(ctl));

for (i = 0; i < num_values; i++) {

switch (type)

{

case MIXER_CTL_TYPE_INT:

printf(" %d", mixer_ctl_get_value(ctl, i));

break;

case MIXER_CTL_TYPE_BOOL:

printf(" %s", mixer_ctl_get_value(ctl, i) ? "On" : "Off");

break;

case MIXER_CTL_TYPE_ENUM:

tinymix_print_enum(ctl, print_all);

break;

case MIXER_CTL_TYPE_BYTE:

printf("%02x", buf[i]);

break;

default:

printf(" unknown");

break;

};

}

if (print_all) {

if (type == MIXER_CTL_TYPE_INT) {

min = mixer_ctl_get_range_min(ctl);

max = mixer_ctl_get_range_max(ctl);

printf(" (range %d->%d)", min, max);

}

}

free(buf);

printf("\n");

}

static void tinymix_set_byte_ctl(struct mixer_ctl *ctl,

char **values, unsigned int num_values)

{

int ret;

char *buf;

char *end;

unsigned int i;

long n;

buf = calloc(1, num_values);

if (buf == NULL) {

fprintf(stderr, "set_byte_ctl: Failed to alloc mem for bytes %d\n", num_values);

exit(EXIT_FAILURE);

}

for (i = 0; i < num_values; i++) {

errno = 0;

n = strtol(values[i], &end, 0);

if (*end) {

fprintf(stderr, "%s not an integer\n", values[i]);

goto fail;

}

if (errno) {

fprintf(stderr, "strtol: %s: %s\n", values[i],

strerror(errno));

goto fail;

}

if (n < 0 || n > 0xff) {

fprintf(stderr, "%s should be between [0, 0xff]\n",

values[i]);

goto fail;

}

buf[i] = n;

}

ret = mixer_ctl_set_array(ctl, buf, num_values);

if (ret < 0) {

fprintf(stderr, "Failed to set binary control\n");

goto fail;

}

free(buf);

return;

fail:

free(buf);

exit(EXIT_FAILURE);

}

static int is_int(char *value)

{

char* end;

long int result;

errno = 0;

result = strtol(value, &end, 10);

if (result == LONG_MIN || result == LONG_MAX)

return 0;

return errno == 0 && *end == '\0';

}

static void tinymix_set_value(struct mixer *mixer, const char *control,

char **values, unsigned int num_values)

{

struct mixer_ctl *ctl;

enum mixer_ctl_type type;

unsigned int num_ctl_values;

unsigned int i;

if (isdigit(control[0]))

ctl = mixer_get_ctl(mixer, atoi(control));

else

ctl = mixer_get_ctl_by_name(mixer, control);

if (!ctl) {

fprintf(stderr, "Invalid mixer control\n");

return;

}

type = mixer_ctl_get_type(ctl);

num_ctl_values = mixer_ctl_get_num_values(ctl);

if (type == MIXER_CTL_TYPE_BYTE) {

tinymix_set_byte_ctl(ctl, values, num_values);

return;

}

if (is_int(values[0])) {

if (num_values == 1) {

/* Set all values the same */

int value = atoi(values[0]);

for (i = 0; i < num_ctl_values; i++) {

if (mixer_ctl_set_value(ctl, i, value)) {

fprintf(stderr, "Error: invalid value\n");

return;

}

}

} else {

/* Set multiple values */

if (num_values > num_ctl_values) {

fprintf(stderr,

"Error: %d values given, but control only takes %d\n",

num_values, num_ctl_values);

return;

}

for (i = 0; i < num_values; i++) {

if (mixer_ctl_set_value(ctl, i, atoi(values[i]))) {

fprintf(stderr, "Error: invalid value for index %d\n", i);

return;

}

}

}

} else {

if (type == MIXER_CTL_TYPE_ENUM) {

if (num_values != 1) {

fprintf(stderr, "Enclose strings in quotes and try again\n");

return;

}

if (mixer_ctl_set_enum_by_string(ctl, values[0]))

fprintf(stderr, "Error: invalid enum value\n");

} else {

fprintf(stderr, "Error: only enum types can be set with strings\n");

}

}

}