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-rw-r--r--src/mixer/simple_abst.c420
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diff --git a/src/mixer/simple_abst.c b/src/mixer/simple_abst.c
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-/**
- * \file mixer/simple_abst.c
- * \brief Mixer Simple Element Class Interface - Module Abstraction
- * \author Jaroslav Kysela <perex@perex.cz>
- * \date 2005
- *
- * Mixer simple element class interface.
- */
-/*
- * Mixer Interface - simple controls - abstraction module
- * Copyright (c) 2005 by Jaroslav Kysela <perex@perex.cz>
- *
- *
- * This library is free software; you can redistribute it and/or modify
- * it under the terms of the GNU Lesser General Public License as
- * published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <string.h>
-#include <fcntl.h>
-#include <sys/ioctl.h>
-#include <math.h>
-#include <dlfcn.h>
-#include "config.h"
-#include "asoundlib.h"
-#include "mixer_simple.h"
-
-#ifndef DOC_HIDDEN
-
-#define SO_PATH ALSA_PLUGIN_DIR "/smixer"
-
-typedef struct _class_priv {
- char *device;
- snd_ctl_t *ctl;
- snd_hctl_t *hctl;
- int attach_flag;
- snd_ctl_card_info_t *info;
- void *dlhandle;
- void *private_data;
- void (*private_free)(snd_mixer_class_t *class);
-} class_priv_t;
-
-typedef int (*snd_mixer_sbasic_init_t)(snd_mixer_class_t *class);
-typedef int (*snd_mixer_sfbasic_init_t)(snd_mixer_class_t *class,
- snd_mixer_t *mixer,
- const char *device);
-
-#endif /* !DOC_HIDDEN */
-
-static int try_open(snd_mixer_class_t *class, const char *lib)
-{
- class_priv_t *priv = snd_mixer_class_get_private(class);
- snd_mixer_event_t event_func;
- snd_mixer_sbasic_init_t init_func = NULL;
- char *xlib, *path;
- void *h;
- int err = 0;
-
- path = getenv("ALSA_MIXER_SIMPLE_MODULES");
- if (!path)
- path = SO_PATH;
- xlib = malloc(strlen(lib) + strlen(path) + 1 + 1);
- if (xlib == NULL)
- return -ENOMEM;
- strcpy(xlib, path);
- strcat(xlib, "/");
- strcat(xlib, lib);
- h = snd_dlopen(xlib, RTLD_NOW);
- if (h == NULL) {
- SNDERR("Unable to open library '%s'", xlib);
- free(xlib);
- return -ENXIO;
- }
- priv->dlhandle = h;
- event_func = snd_dlsym(h, "alsa_mixer_simple_event", NULL);
- if (event_func == NULL) {
- SNDERR("Symbol 'alsa_mixer_simple_event' was not found in '%s'", xlib);
- err = -ENXIO;
- }
- if (err == 0) {
- init_func = snd_dlsym(h, "alsa_mixer_simple_init", NULL);
- if (init_func == NULL) {
- SNDERR("Symbol 'alsa_mixer_simple_init' was not found in '%s'", xlib);
- err = -ENXIO;
- }
- }
- free(xlib);
- err = err == 0 ? init_func(class) : err;
- if (err < 0)
- return err;
- snd_mixer_class_set_event(class, event_func);
- return 1;
-}
-
-static int try_open_full(snd_mixer_class_t *class, snd_mixer_t *mixer,
- const char *lib, const char *device)
-{
- class_priv_t *priv = snd_mixer_class_get_private(class);
- snd_mixer_event_t event_func;
- snd_mixer_sfbasic_init_t init_func = NULL;
- char *xlib, *path;
- void *h;
- int err = 0;
-
- path = getenv("ALSA_MIXER_SIMPLE_MODULES");
- if (!path)
- path = SO_PATH;
- xlib = malloc(strlen(lib) + strlen(path) + 1 + 1);
- if (xlib == NULL)
- return -ENOMEM;
- strcpy(xlib, path);
- strcat(xlib, "/");
- strcat(xlib, lib);
- /* note python modules requires RTLD_GLOBAL */
- h = snd_dlopen(xlib, RTLD_NOW|RTLD_GLOBAL);
- if (h == NULL) {
- SNDERR("Unable to open library '%s'", xlib);
- free(xlib);
- return -ENXIO;
- }
- priv->dlhandle = h;
- event_func = snd_dlsym(h, "alsa_mixer_simple_event", NULL);
- if (event_func == NULL) {
- SNDERR("Symbol 'alsa_mixer_simple_event' was not found in '%s'", xlib);
- err = -ENXIO;
- }
- if (err == 0) {
- init_func = snd_dlsym(h, "alsa_mixer_simple_finit", NULL);
- if (init_func == NULL) {
- SNDERR("Symbol 'alsa_mixer_simple_finit' was not found in '%s'", xlib);
- err = -ENXIO;
- }
- }
- free(xlib);
- err = err == 0 ? init_func(class, mixer, device) : err;
- if (err < 0)
- return err;
- snd_mixer_class_set_event(class, event_func);
- return 1;
-}
-
-static int match(snd_mixer_class_t *class, const char *lib, const char *searchl)
-{
- class_priv_t *priv = snd_mixer_class_get_private(class);
- const char *components;
-
- if (searchl == NULL)
- return try_open(class, lib);
- components = snd_ctl_card_info_get_components(priv->info);
- while (*components != '\0') {
- if (!strncmp(components, searchl, strlen(searchl)))
- return try_open(class, lib);
- while (*components != ' ' && *components != '\0')
- components++;
- while (*components == ' ' && *components != '\0')
- components++;
- }
- return 0;
-}
-
-static int find_full(snd_mixer_class_t *class, snd_mixer_t *mixer,
- snd_config_t *top, const char *device)
-{
- snd_config_iterator_t i, next;
- char *lib;
- const char *id;
- int err;
-
- snd_config_for_each(i, next, top) {
- snd_config_t *n = snd_config_iterator_entry(i);
- if (snd_config_get_id(n, &id) < 0)
- continue;
- if (strcmp(id, "_full"))
- continue;
- err = snd_config_get_string(n, (const char **)&lib);
- if (err < 0)
- return err;
- err = try_open_full(class, mixer, lib, device);
- if (err < 0)
- return err;
- return 0;
- }
- return -ENOENT;
-}
-
-static int find_module(snd_mixer_class_t *class, snd_config_t *top)
-{
- snd_config_iterator_t i, next;
- snd_config_iterator_t j, jnext;
- char *lib, *searchl;
- const char *id;
- int err;
-
- snd_config_for_each(i, next, top) {
- snd_config_t *n = snd_config_iterator_entry(i);
- if (snd_config_get_id(n, &id) < 0)
- continue;
- if (*id == '_')
- continue;
- searchl = NULL;
- lib = NULL;
- snd_config_for_each(j, jnext, n) {
- snd_config_t *m = snd_config_iterator_entry(j);
- if (snd_config_get_id(m, &id) < 0)
- continue;
- if (!strcmp(id, "searchl")) {
- err = snd_config_get_string(m, (const char **)&searchl);
- if (err < 0)
- return err;
- continue;
- }
- if (!strcmp(id, "lib")) {
- err = snd_config_get_string(m, (const char **)&lib);
- if (err < 0)
- return err;
- continue;
- }
- }
- err = match(class, lib, searchl);
- if (err == 1)
- return 0;
- if (err < 0)
- return err;
- }
- return -ENOENT;
-}
-
-static void private_free(snd_mixer_class_t *class)
-{
- class_priv_t *priv = snd_mixer_class_get_private(class);
-
- if (priv->private_free)
- priv->private_free(class);
- if (priv->dlhandle)
- snd_dlclose(priv->dlhandle);
- if (priv->info)
- snd_ctl_card_info_free(priv->info);
- if (priv->hctl) {
- if (priv->attach_flag)
- snd_mixer_detach_hctl(snd_mixer_class_get_mixer(class), priv->hctl);
- snd_hctl_close(priv->hctl);
- } else if (priv->ctl)
- snd_ctl_close(priv->ctl);
- free(priv->device);
- free(priv);
-}
-
-/**
- * \brief Register mixer simple element class - basic abstraction
- * \param mixer Mixer handle
- * \param options Options container
- * \param classp Pointer to returned mixer simple element class handle (or NULL
- * \return 0 on success otherwise a negative error code
- */
-int snd_mixer_simple_basic_register(snd_mixer_t *mixer,
- struct snd_mixer_selem_regopt *options,
- snd_mixer_class_t **classp)
-{
- snd_mixer_class_t *class;
- class_priv_t *priv = calloc(1, sizeof(*priv));
- const char *file;
- snd_input_t *input;
- snd_config_t *top = NULL;
- int err;
-
- if (priv == NULL)
- return -ENOMEM;
- if (options->device == NULL) {
- free(priv);
- return -EINVAL;
- }
- if (snd_mixer_class_malloc(&class)) {
- free(priv);
- return -ENOMEM;
- }
- priv->device = strdup(options->device);
- if (priv->device == NULL) {
- free(priv);
- snd_mixer_class_free(class);
- return -ENOMEM;
- }
- snd_mixer_class_set_compare(class, snd_mixer_selem_compare);
- snd_mixer_class_set_private(class, priv);
- snd_mixer_class_set_private_free(class, private_free);
- file = getenv("ALSA_MIXER_SIMPLE");
- if (!file)
- file = ALSA_CONFIG_DIR "/smixer.conf";
- err = snd_config_top(&top);
- if (err >= 0) {
- err = snd_input_stdio_open(&input, file, "r");
- if (err < 0) {
- SNDERR("unable to open simple mixer configuration file '%s'", file);
- goto __error;
- }
- err = snd_config_load(top, input);
- snd_input_close(input);
- if (err < 0) {
- SNDERR("%s may be old or corrupted: consider to remove or fix it", file);
- goto __error;
- }
- err = find_full(class, mixer, top, priv->device);
- if (err >= 0)
- goto __full;
- }
- if (err >= 0) {
- err = snd_ctl_open(&priv->ctl, priv->device, 0);
- if (err < 0) {
- SNDERR("unable to open control device '%s': %s", priv->device, snd_strerror(err));
- goto __error;
- }
- err = snd_hctl_open_ctl(&priv->hctl, priv->ctl);
- if (err < 0)
- goto __error;
- err = snd_ctl_card_info_malloc(&priv->info);
- if (err < 0)
- goto __error;
- err = snd_ctl_card_info(priv->ctl, priv->info);
- if (err < 0)
- goto __error;
- }
- if (err >= 0)
- err = find_module(class, top);
- if (err >= 0)
- err = snd_mixer_attach_hctl(mixer, priv->hctl);
- if (err >= 0) {
- priv->attach_flag = 1;
- err = snd_mixer_class_register(class, mixer);
- }
- __full:
- if (err < 0) {
- __error:
- if (top)
- snd_config_delete(top);
- if (class)
- snd_mixer_class_free(class);
- return err;
- }
- if (top)
- snd_config_delete(top);
- if (classp)
- *classp = class;
- return 0;
-}
-
-/**
- * \brief Basic Mixer Abstraction - Get information about device
- * \param class Mixer class
- * \param info Info structure
- * \return 0 on success otherwise a negative error code
- */
-int snd_mixer_sbasic_info(const snd_mixer_class_t *class, sm_class_basic_t *info)
-{
- class_priv_t *priv = snd_mixer_class_get_private(class);
-
- if (class == NULL || info == NULL)
- return -EINVAL;
- info->device = priv->device;
- info->ctl = priv->ctl;
- info->hctl = priv->hctl;
- info->info = priv->info;
- return 0;
-}
-
-/**
- * \brief Get private data for basic abstraction
- * \param class Mixer class
- * \return private data
- */
-void *snd_mixer_sbasic_get_private(const snd_mixer_class_t *class)
-{
- class_priv_t *priv = snd_mixer_class_get_private(class);
-
- if (class == NULL)
- return NULL;
- return priv->private_data;
-}
-
-/**
- * \brief Set private data for basic abstraction
- * \param class Mixer class
- * \param private_data Private data
- */
-void snd_mixer_sbasic_set_private(const snd_mixer_class_t *class, void *private_data)
-{
- class_priv_t *priv;
-
- if (class == NULL)
- return;
- priv = snd_mixer_class_get_private(class);
- priv->private_data = private_data;
-}
-
-/**
- * \brief Set private data free callback for basic abstraction
- * \param class Mixer class
- * \param private_free free callback for private data
- */
-void snd_mixer_sbasic_set_private_free(const snd_mixer_class_t *class, void (*private_free)(snd_mixer_class_t *class))
-{
- class_priv_t *priv;
-
- if (class == NULL)
- return;
- priv = snd_mixer_class_get_private(class);
- priv->private_free = private_free;
-}
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