[PATCH] ascenario: Add scenario support to alsa-lib
Stefan Schmidt
stefan at slimlogic.co.uk
Wed Sep 30 16:22:45 CEST 2009
It allows switching audio settings between scenarios or uses-cases like
listening to music and answering an incoming phone call. Made of control
aliasing for playback, capture master and switch as well as the option to
post- and prefix a sequence of control changes avoiding pops and other
unwanted noise. Some example programs will be available in alsa-utils.
CC: Ian Molton <ian at mnementh.co.uk>
CC: Graeme Gregory <gg at slimlogic.co.uk>
Signed-off-by: Liam Girdwood <lrg at slimlogic.co.uk>
Signed-off-by: Stefan Schmidt <stefan at slimlogic.co.uk>
---
include/Makefile.am | 2 +-
include/ascenario.h | 170 +++++++
src/Makefile.am | 2 +-
src/ascenario.c | 1360 +++++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 1532 insertions(+), 2 deletions(-)
create mode 100644 include/ascenario.h
create mode 100644 src/ascenario.c
diff --git a/include/Makefile.am b/include/Makefile.am
index a291503..572fbc9 100644
--- a/include/Makefile.am
+++ b/include/Makefile.am
@@ -3,7 +3,7 @@ SUBDIRS = sound
sysincludedir = ${includedir}/sys
alsaincludedir = ${includedir}/alsa
-alsainclude_HEADERS = asoundlib.h asoundef.h \
+alsainclude_HEADERS = asoundlib.h asoundef.h ascenario.h \
version.h global.h input.h output.h error.h \
conf.h control.h iatomic.h
diff --git a/include/ascenario.h b/include/ascenario.h
new file mode 100644
index 0000000..869f2ea
--- /dev/null
+++ b/include/ascenario.h
@@ -0,0 +1,170 @@
+/*
+* ALSA Scenario header file
+*
+* 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
+*
+* Copyright (C) 2008-2009 SlimLogic Ltd
+* Authors: Liam Girdwood <lrg at slimlogic.co.uk>
+* Stefan Schmidt <stefan at slimlogic.co.uk>
+*/
+
+/**
+ * Scenario IDs
+ *
+ * Standard Scenario IDs - Add new scenarios at the end.
+ */
+
+#define SND_SCN_PLAYBACK_SPEAKER "playback speaker"
+#define SND_SCN_PLAYBACK_HEADPHONES "playback headphone"
+#define SND_SCN_PLAYBACK_HEADSET "playback headset"
+#define SND_SCN_PLAYBACK_BLUETOOTH "playback bluetooth"
+#define SND_SCN_PLAYBACK_HANDSET "playback handset"
+#define SND_SCN_PLAYBACK_GSM "playback gsm"
+#define SND_SCN_PLAYBACK_LINE "playback line"
+
+#define SND_SCN_CAPTURE_MIC "capture mic"
+#define SND_SCN_CAPTURE_LINE "capture line"
+#define SND_SCN_CAPTURE_HEADSET "capture headset"
+#define SND_SCN_CAPTURE_HANDSET "capture handset"
+#define SND_SCN_CAPTURE_BLUETOOTH "capture bluetooth"
+#define SND_SCN_CAPTURE_GSM "capture gsm"
+
+#define SND_SCN_PHONECALL_GSM_HANDSET "phonecall gsm handset"
+#define SND_SCN_PHONECALL_BT_HANDSET "phonecall bt handset"
+#define SND_SCN_PHONECALL_IP_HANDSET "phonecall ip handset"
+#define SND_SCN_PHONECALL_GSM_HEADSET "phonecall gsm headset"
+#define SND_SCN_PHONECALL_BT_HEADSET "phonecall bt headset"
+#define SND_SCN_PHONECALL_IP_HEADSET "phonecall ip headset"
+
+/**
+ * QOS
+ *
+ * Defines Audio Quality of Service. Systems supporting different types of QoS
+ * often have lower power consumption on lower quality levels.
+ */
+#define SND_POWER_QOS_HIFI 0
+#define SND_POWER_QOS_VOICE 1
+#define SND_POWER_QOS_SYSTEM 2
+
+struct snd_scenario;
+
+/* TODO: add notification */
+
+/**
+ * snd_scenario_list - list supported scenarios
+ * @scn: scenario
+ * @list: list of supported scenario names.
+ *
+ * List supported scenarios for this sound card.
+ * Returns number of scenarios.
+ */
+int snd_scenario_list(struct snd_scenario *scn, const char **list[]);
+
+/**
+ * snd_scenario_set_scn - set scenario
+ * @scn: scenario
+ * @scenario: scenario name
+ *
+ * Set new scenario for sound card.
+ */
+int snd_scenario_set_scn(struct snd_scenario *scn, const char *scenario);
+
+/**
+ * snd_scenario_get_scn - get scenario
+ * @scn: scenario
+ *
+ * Get current sound card scenario.
+ */
+const char *snd_scenario_get_scn(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_get_master_playback_volume - get playback volume
+ * @scn: scenario
+ *
+ * Get the master playback volume control name for the current scenario.
+ */
+int snd_scenario_get_master_playback_volume(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_get_master_playback_switch - get playback switch
+ * @scn: scenario
+ *
+ * Get the master playback switch control name for the current scenario.
+ */
+ int snd_scenario_get_master_playback_switch(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_get_master_capture_volume - get capture volume
+ * @scn: scenario
+ *
+ * Get the master capture volume control name for the current scenario.
+ */
+int snd_scenario_get_master_capture_volume(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_get_master_capture_switch - get capture switch
+ * @scn: scenario
+ *
+ * Get the master capture switch control name for the current scenario.
+ */
+int snd_scenario_get_master_capture_switch(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_set_qos - set qos
+ * @qos: qos
+ *
+ * Set Quality of Service for this scenario.
+ */
+int snd_scenario_set_qos(struct snd_scenario *scn, int qos);
+
+/**
+ * snd_scenario_get_qos - get qos
+ * @scn: scenario
+ *
+ * Get Quality of Service for this scenario.
+ */
+int snd_scenario_get_qos(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_open - open scenario core
+ * @card_name: sound card name.
+ *
+ * Open scenario manager core for sound card.
+ */
+struct snd_scenario *snd_scenario_open(const char *card_name);
+
+/**
+ * snd_scenario_reload - reload and reparse scenario configuration
+ * @scn: scenario
+ *
+ * Reloads and reparses sound card scenario configuration.
+ */
+int snd_scenario_reload(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_close - close scenario core
+ * @scn: scenario
+ *
+ * Free scenario manager core for sound card.
+ */
+void snd_scenario_close(struct snd_scenario *scn);
+
+/**
+ * snd_scenario_dump - dump
+ * @card_name: sound card name.
+ *
+ * Dump current sound card settings to stdout in scn format.
+ */
+int snd_scenario_dump(const char *card_name);
diff --git a/src/Makefile.am b/src/Makefile.am
index 3204fe4..be46cb3 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -14,7 +14,7 @@ SYMFUNCS =
endif
lib_LTLIBRARIES = libasound.la
-libasound_la_SOURCES = conf.c confmisc.c input.c output.c async.c error.c dlmisc.c socket.c shmarea.c userfile.c names.c
+libasound_la_SOURCES = conf.c confmisc.c input.c output.c async.c error.c dlmisc.c socket.c shmarea.c userfile.c names.c ascenario.c
SUBDIRS=control
libasound_la_LIBADD = control/libcontrol.la
diff --git a/src/ascenario.c b/src/ascenario.c
new file mode 100644
index 0000000..99f239e
--- /dev/null
+++ b/src/ascenario.c
@@ -0,0 +1,1360 @@
+/*
+ * 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 of the License, or (at your option) any later version.
+ *
+ * This library 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 General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
+ *
+ * Copyright (C) 2008-2009 SlimLogic Ltd
+ * Authors: Liam Girdwood <lrg at slimlogic.co.uk>
+ * Stefan Schmidt <stefan at slimlogic.co.uk>
+ */
+
+#define _GNU_SOURCE /* needed of O_NOATIME */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <ctype.h>
+#include <alsa/asoundlib.h>
+
+#include "../include/ascenario.h"
+
+#define PRE_SEQ 0
+#define POST_SEQ 1
+#define MAX_SCN 32
+#define MAX_NAME 64
+#define MAX_FILE 256
+#define MAX_BUF 256
+#define ALSA_SCN_DIR "/etc/alsa/scenario"
+
+/*
+ * Stores all scenario settings for 1 kcontrol. Hence we have a
+ * control_settings for each kcontrol in card.
+ */
+struct control_settings {
+ char name[MAX_NAME];
+ int id;
+ snd_ctl_elem_type_t type;
+ int count; /* 1 = mono, 2 = stereo, etc */
+ unsigned short *value; /* kcontrol value 2D array */
+};
+
+/*
+ * If sleep is 0 the element contains the settings in control. Else sleep
+ * contains the sleep time in micro seconds.
+ */
+struct sequence_element {
+ unsigned int sleep; /* Sleep time in msecs if sleep element, else 0 */
+ struct control_settings *control;
+ struct sequence_element *next; /* Pointer to next list element */
+};
+
+/*
+ * Describes default mixers and qos for scenario.
+ * We have a scenario_info for each scenario loaded.
+ */
+struct scenario_info {
+ char *name;
+ char *file;
+ char *pre_sequence_file;
+ char *post_sequence_file;
+ short playback_volume_id;
+ short playback_switch_id;
+ short capture_volume_id;
+ short capture_switch_id;
+ int qos;
+};
+
+/* Describe a snd card and all its scenarios.
+ */
+struct snd_scenario {
+ char *card_name;
+ int current_scenario;
+ int num_scenarios; /* number of supported scenarios */
+ int num_kcontrols; /* number of kcontrols */
+ struct sequence_element *pre_seq_list; /* Linked list for pre sequence */
+ struct sequence_element *post_seq_list; /* Linked list for post sequence */
+ const char **list;
+ struct scenario_info *scenario; /* var len array of scenario info */
+ struct control_settings *control; /* var len array of controls */
+};
+
+static void scn_error(const char *fmt,...)
+{
+ va_list va;
+ va_start(va, fmt);
+ fprintf(stderr, "scenario: ");
+ vfprintf(stderr, fmt, va);
+ va_end(va);
+}
+
+static void scn_stdout(const char *fmt,...)
+{
+ va_list va;
+ va_start(va, fmt);
+ vfprintf(stdout, fmt, va);
+ va_end(va);
+}
+
+static inline void set_value(struct snd_scenario *scn,
+ struct control_settings *control, int count, unsigned short val)
+{
+ int offset = scn->current_scenario * control->count;
+ control->value[offset + count] = val;
+}
+
+static inline unsigned short get_value(struct snd_scenario *scn,
+ struct control_settings *control, int count)
+{
+ int offset = scn->current_scenario * control->count;
+ return control->value[offset + count];
+}
+
+static int dump_control(snd_ctl_t *handle, snd_ctl_elem_id_t *id)
+{
+ int err, count, i;
+ snd_ctl_elem_info_t *info;
+ snd_ctl_elem_type_t type;
+ snd_ctl_elem_value_t *control;
+
+ snd_ctl_elem_info_alloca(&info);
+ snd_ctl_elem_value_alloca(&control);
+
+ snd_ctl_elem_info_set_id(info, id);
+ err = snd_ctl_elem_info(handle, info);
+ if (err < 0) {
+ scn_stdout("%s: failed to get ctl info\n");
+ return err;
+ }
+
+ snd_ctl_elem_value_set_id(control, id);
+ snd_ctl_elem_read(handle, control);
+
+ type = snd_ctl_elem_info_get_type(info);
+ count = snd_ctl_elem_info_get_count(info);
+ if (count == 0)
+ return 0;
+
+ scn_stdout("%u:'%s':%d:",
+ snd_ctl_elem_id_get_numid(id),
+ snd_ctl_elem_id_get_name(id), count);
+
+ switch (type) {
+ case SND_CTL_ELEM_TYPE_BOOLEAN:
+ for (i = 0; i < count - 1; i++)
+ scn_stdout("%d,",
+ snd_ctl_elem_value_get_boolean(control, i));
+ scn_stdout("%d", snd_ctl_elem_value_get_boolean(control, i));
+ break;
+ case SND_CTL_ELEM_TYPE_INTEGER:
+ for (i = 0; i < count - 1; i++)
+ scn_stdout("%d,",
+ snd_ctl_elem_value_get_integer(control, i));
+ scn_stdout("%d", snd_ctl_elem_value_get_integer(control, i));
+ break;
+ case SND_CTL_ELEM_TYPE_INTEGER64:
+ for (i = 0; i < count - 1; i++)
+ scn_stdout("%ld,",
+ snd_ctl_elem_value_get_integer64(control, i));
+ scn_stdout("%ld",
+ snd_ctl_elem_value_get_integer64(control, i));
+ break;
+ case SND_CTL_ELEM_TYPE_ENUMERATED:
+ for (i = 0; i < count - 1; i++)
+ scn_stdout("%d,",
+ snd_ctl_elem_value_get_enumerated(control, i));
+ scn_stdout("%d",
+ snd_ctl_elem_value_get_enumerated(control, i));
+ break;
+ case SND_CTL_ELEM_TYPE_BYTES:
+ for (i = 0; i < count - 1; i++)
+ scn_stdout("%2.2x,",
+ snd_ctl_elem_value_get_byte(control, i));
+ scn_stdout("%2.2x", snd_ctl_elem_value_get_byte(control, i));
+ break;
+ default:
+ break;
+ }
+ scn_stdout("\n");
+ return 0;
+}
+
+/*
+ * Add new kcontrol from sound card into memory database.
+ */
+static int add_control(snd_ctl_t *handle, snd_ctl_elem_id_t *id,
+ struct control_settings *control_settings)
+{
+ int err;
+ snd_ctl_elem_info_t *info;
+ snd_ctl_elem_value_t *control;
+
+ snd_ctl_elem_info_alloca(&info);
+ snd_ctl_elem_value_alloca(&control);
+
+ snd_ctl_elem_info_set_id(info, id);
+ err = snd_ctl_elem_info(handle, info);
+ if (err < 0) {
+ scn_stdout("%s: failed to get ctl info\n");
+ return err;
+ }
+
+ snd_ctl_elem_value_set_id(control, id);
+ snd_ctl_elem_read(handle, control);
+
+ strncpy(control_settings->name, snd_ctl_elem_id_get_name(id),
+ MAX_NAME);
+ control_settings->count = snd_ctl_elem_info_get_count(info);
+ control_settings->type = snd_ctl_elem_info_get_type(info);
+ control_settings->id = snd_ctl_elem_id_get_numid(id);
+ return 0;
+}
+
+static int parse_controls(struct snd_scenario *scn, FILE *f)
+{
+ struct control_settings *control;
+ char buf[MAX_BUF], name[MAX_NAME];
+ int id, count, line = 1, i;
+ char *name_start, *name_end, *tbuf;
+
+ while (fgets(buf, MAX_BUF, f) != NULL) {
+
+ /* get id */
+ tbuf = buf;
+ id = atoi(tbuf);
+ if (id == 0) {
+ scn_error("%s:id == 0 on line %d\n", __func__, line);
+ return -EINVAL;
+ }
+ for (i = 0; i < scn->num_kcontrols; i++) {
+ if (id == scn->control[i].id) {
+ control = &scn->control[i];
+ goto get_name;
+ }
+ }
+ scn_error("%s:id not found at line %d\n", __func__, line);
+ return -EINVAL;
+get_name:
+ /* get name start */
+ while (*tbuf != 0 && *tbuf != '\'')
+ tbuf++;
+ if (*tbuf == 0)
+ return -EINVAL;
+ name_start = ++tbuf;
+
+ /* get name end */
+ while (*tbuf != 0 && *tbuf != '\'')
+ tbuf++;
+ if (*tbuf == 0)
+ return -EINVAL;
+ name_end = tbuf++;
+
+ /* copy name */
+ if ((name_end - name_start) > MAX_NAME) {
+ scn_error("%s:name too big at %d chars line %d\n",
+ __func__, name_end - name_start, line);
+ return -EINVAL;
+ }
+ strncpy(name, name_start, name_end - name_start);
+ name[name_end - name_start] = 0;
+ if (strcmp(name, control->name)) {
+ scn_error("%s: name %s and %s don't match at line %d\n",
+ __func__, name, control->name, line);
+ return -EINVAL;
+ }
+
+ /* get count */
+ tbuf++;
+ count = atoi(tbuf);
+ if (count == 0) {
+ scn_error("%s:count == 0 on line %d\n", __func__,
+ line);
+ return -EINVAL;
+ }
+ if (count != control->count) {
+ scn_error("%s:count does not match at line %d\n",
+ __func__, line);
+ return -EINVAL;
+ }
+
+ /* get vals */
+ control->value = malloc(control->count * scn->num_scenarios *
+ sizeof(unsigned short));
+ if (control->value == NULL)
+ return -ENOMEM;
+
+ while (*tbuf != 0 && *tbuf != ':')
+ tbuf++;
+ if (*tbuf == 0)
+ return -EINVAL;
+ tbuf++;
+
+ for (i = 0; i < count; i++) {
+ set_value(scn, control, i, atoi(tbuf));
+ while (*tbuf != 0 && *tbuf != ',')
+ tbuf++;
+
+ if (*tbuf++ == 0 && i < (count - 1))
+ return -EINVAL;
+ }
+ line++;
+ }
+
+ return 0;
+}
+
+static char *get_string (char *buf)
+{
+ char *str, *end;
+
+ /* find '=' */
+ while (isblank(*buf))
+ buf++;
+ if (*buf == 0 || *buf != '=') {
+ scn_error("%s: missing '='\n", __func__);
+ return NULL;
+ }
+
+ /* find leading '"' */
+ buf++;
+ while (isblank(*buf))
+ buf++;
+ if (*buf == 0 || *buf != '"') {
+ scn_error("%s: missing start '\"'\n", __func__);
+ return NULL;
+ }
+ str = ++buf;
+
+ /* get value */
+ while (*buf != 0 && *buf != '"')
+ buf++;
+ end = buf;
+
+ /* find '"' terminator */
+ if (*buf == 0 || *buf != '"') {
+ scn_error("%s: missing terminator '\"' %s\n", __func__, buf);
+ return NULL;
+ }
+
+ *end = 0;
+ return strdup(str);
+}
+
+static char *get_control_name (char *buf)
+{
+ char *str, *end;
+
+ /* find leading '"' */
+ buf++;
+ while (isblank(*buf))
+ buf++;
+ if (*buf == 0 || *buf != '"') {
+ scn_error("%s: missing start '\"'\n", __func__);
+ return NULL;
+ }
+ str = ++buf;
+
+ /* get value */
+ while (*buf != 0 && *buf != '"')
+ buf++;
+ end = buf;
+
+ /* find '"' terminator */
+ if (*buf == 0 || *buf != '"') {
+ scn_error("%s: missing terminator '\"' %s\n", __func__, buf);
+ return NULL;
+ }
+
+ *end = 0;
+ return strdup(str);
+}
+
+static int get_int (char *buf)
+{
+ /* find '=' */
+ while (isblank(*buf))
+ buf++;
+ if (*buf == 0 || *buf != '=') {
+ scn_error("%s: missing '='\n", __func__);
+ return -EINVAL;
+ }
+ buf++;
+ return atoi(buf);
+}
+
+static int get_enum (char *buf)
+{
+ /* find '=' */
+ while (isblank(*buf))
+ buf++;
+ if (*buf == 0 || *buf != '=') {
+ scn_error("%s: missing '='\n", __func__);
+ return -EINVAL;
+ }
+ buf++;
+ return 0; /* TODO */
+}
+
+static void seq_list_append(struct snd_scenario *scn,
+ struct sequence_element *curr, int position)
+{
+ struct sequence_element *last, *tmp;
+
+ if (position) {
+ if (!scn->post_seq_list)
+ scn->post_seq_list = curr;
+
+ else {
+ tmp = scn->post_seq_list;
+ while (tmp) {
+ last = tmp;
+ tmp = tmp->next;
+ }
+ last->next = curr;
+ }
+ }
+ else {
+ if (!scn->pre_seq_list) {
+ scn->pre_seq_list = curr;
+ }
+ else {
+ tmp = scn->pre_seq_list;
+ while (tmp) {
+ last = tmp;
+ tmp = tmp->next;
+ }
+ last->next = curr;
+ }
+ }
+}
+
+static int parse_sequences(struct snd_scenario *scn, FILE *f, int position)
+{
+ char buf[MAX_BUF], *tbuf, *control_value;
+ int control_len, i;
+ struct sequence_element *curr;
+
+ while (fgets(buf, MAX_BUF, f) != NULL) {
+
+ /* Check for lines with comments and ignore */
+ if (buf[0] == '#')
+ continue;
+
+ /* Parse current line and skip blanks */
+ tbuf = buf;
+ while (isblank(*tbuf))
+ tbuf++;
+
+ curr = malloc(sizeof(struct sequence_element));
+ if (curr == NULL)
+ return -ENOMEM;
+ bzero(curr, sizeof(struct sequence_element));
+
+ curr->control = malloc(sizeof(struct control_settings));
+ if (curr->control == NULL)
+ return -ENOMEM;
+ bzero(curr->control, sizeof(struct control_settings));
+
+ curr->control->value = malloc(curr->control->count * scn->num_scenarios
+ * sizeof(unsigned short));
+ if (curr->control->value == NULL)
+ return -ENOMEM;
+ bzero(curr->control->value, curr->control->count * scn->num_scenarios
+ * sizeof(unsigned short));
+
+ if (strncmp(tbuf, "kcontrol", 8) == 0) {
+ strncpy(curr->control->name, get_control_name(tbuf + 8), MAX_NAME);
+ control_len = strlen(curr->control->name);
+ /* 11 = 8 from kcontrol + 2 quotes + 1 blank */
+ control_value = get_string(tbuf + 11 + control_len);
+
+ for (i = 0; i < scn->num_kcontrols; i++) {
+ if (strncmp(curr->control->name, scn->control[i].name,
+ control_len) == 0) {
+ curr->sleep = 0;
+ curr->control->id = scn->control[i].id;
+ curr->control->type = scn->control[i].type;
+ curr->control->count = scn->control[i].count;
+ set_value(scn, curr->control, curr->control->count,
+ atoi(control_value));
+ seq_list_append(scn, curr, position);
+ }
+ }
+
+ continue;
+ }
+
+ if (strncmp(tbuf, "msleep", 6) == 0) {
+ curr->sleep = get_int(tbuf + 6);
+
+ /* Free control elements as we only have a sleep element
+ * here */
+ if (curr->control) {
+ if (curr->control->value)
+ free(curr->control->value);
+ free(curr->control);
+ }
+
+ seq_list_append(scn, curr, position);
+ continue;
+ }
+ }
+
+ return 0;
+}
+
+/* load scenario i */
+static int read_scenario_file(struct snd_scenario *scn)
+{
+ int fd, ret;
+ FILE *f;
+ char filename[MAX_FILE];
+ struct scenario_info *info = &scn->scenario[scn->current_scenario];
+
+ snprintf(filename, MAX_FILE, "%s/%s/%s", ALSA_SCN_DIR, scn->card_name,
+ info->file);
+
+ fd = open(filename, O_RDONLY | O_NOATIME);
+ if (fd < 0) {
+ scn_error("%s: couldn't open %s\n", __func__, filename);
+ return fd;
+ }
+
+ f = fdopen(fd, "r");
+ if (f == NULL) {
+ ret = errno;
+ goto close;
+ }
+
+ ret = parse_controls(scn, f);
+ fclose(f);
+close:
+ close(fd);
+ return ret;
+}
+
+static int read_sequence_file(struct snd_scenario *scn, int position)
+{
+ int fd, ret;
+ FILE *f;
+ char filename[MAX_FILE];
+ struct scenario_info *info = &scn->scenario[scn->current_scenario];
+
+ if (position == PRE_SEQ) {
+ sprintf(filename, "%s/%s/%s", ALSA_SCN_DIR, scn->card_name,
+ info->pre_sequence_file);
+ }
+ else {
+ sprintf(filename, "%s/%s/%s", ALSA_SCN_DIR, scn->card_name,
+ info->post_sequence_file);
+ }
+
+ fd = open(filename, O_RDONLY | O_NOATIME);
+ if (fd < 0) {
+ return fd;
+ }
+
+ f = fdopen(fd, "r");
+ if (f == NULL) {
+ ret = errno;
+ goto close;
+ }
+
+ ret = parse_sequences(scn, f, position);
+ fclose(f);
+close:
+ close(fd);
+ return ret;
+}
+
+static int parse_scenario(struct snd_scenario *scn, FILE *f, int line_)
+{
+ struct scenario_info *info;
+ int line = line_ - 1, id = 0, file = 0, len, offset;
+ char buf[MAX_BUF], *tbuf;
+
+ offset = sizeof(scn->scenario);
+ scn->scenario = realloc(scn->scenario,
+ (scn->num_scenarios + 1) * sizeof(struct scenario_info));
+ len = sizeof(scn->scenario) - offset;
+ if (scn->scenario == NULL)
+ return -ENOMEM;
+ bzero(scn->scenario + offset, len);
+ info = scn->scenario + scn->num_scenarios;
+
+ /* Set sequence filename to NULL as it is optional and we want to check
+ * for NULL to avoid segfaults */
+ info->pre_sequence_file = NULL;
+ info->post_sequence_file = NULL;
+
+ while(fgets(buf, MAX_BUF, f) != NULL) {
+
+ line++;
+ if (buf[0] == '#')
+ continue;
+
+ tbuf = buf;
+ while (isblank(*tbuf))
+ tbuf++;
+
+ if (strncmp(tbuf, "Identifier", 10) == 0) {
+ info->name = get_string(tbuf + 10);
+ if (info->name == NULL) {
+ scn_error("%s: failed to get Identifer\n",
+ __func__);
+ goto err;
+ }
+ id = 1;
+ continue;
+ }
+
+ if (strncmp(tbuf, "File", 4) == 0) {
+ info->file = get_string(tbuf + 4);
+ if (info->file == NULL) {
+ scn_error("%s: failed to get File\n",
+ __func__);
+ goto err;
+ }
+ file = 1;
+ continue;
+ }
+
+ if (strncmp(tbuf, "QoS", 3) == 0) {
+ info->qos = get_enum(tbuf + 3);
+ if (info->qos < 0) {
+ scn_error("%s: failed to get QoS\n",
+ __func__);
+ goto err;
+ }
+ continue;
+ }
+
+ if (strncmp(tbuf, "Master Playback Volume", 22) == 0) {
+ info->playback_volume_id = get_int(tbuf + 22);
+ if (info->playback_volume_id < 0) {
+ scn_error("%s: failed to get Master Playback Volume\n",
+ __func__);
+ goto err;
+ }
+ continue;
+ }
+
+ if (strncmp(tbuf, "Master Playback Switch", 22) == 0) {
+ info->playback_switch_id = get_int(tbuf + 22);
+ if (info->playback_switch_id < 0) {
+ scn_error("%s: failed to get Master Playback Switch\n",
+ __func__);
+ goto err;
+ }
+ continue;
+ }
+
+ if (strncmp(tbuf, "Master Capture Volume", 21) == 0) {
+ info->capture_volume_id = get_int(tbuf + 21);
+ if (info->capture_volume_id < 0) {
+ scn_error("%s: failed to get Master Capture Volume\n",
+ __func__);
+ goto err;
+ }
+ continue;
+ }
+
+ if (strncmp(tbuf, "Master Capture Switch", 21) == 0) {
+ info->capture_switch_id = get_int(tbuf + 21);
+ if (info->capture_switch_id < 0) {
+ scn_error("%s: failed to get Master Capture Switch\n",
+ __func__);
+ goto err;
+ }
+ continue;
+ }
+
+ if (strncmp(tbuf, "PreSequenceFile", 15) == 0) {
+ info->pre_sequence_file = get_string(tbuf + 15);
+ if (info->pre_sequence_file == NULL) {
+ scn_error("%s: failed to get PreSequenceFile\n",
+ __func__);
+ goto err;
+ }
+ continue;
+ }
+
+ if (strncmp(tbuf, "PostSequenceFile", 16) == 0) {
+ info->post_sequence_file = get_string(tbuf + 16);
+ if (info->post_sequence_file == NULL) {
+ scn_error("%s: failed to get PostSequenceFile\n",
+ __func__);
+ goto err;
+ }
+ continue;
+ }
+
+ if (strncmp(tbuf, "EndSection", 10) == 0) {
+ break;
+ }
+ }
+
+ if (file & id) {
+ scn->num_scenarios++;
+ return 0;
+ }
+err:
+ if (file) {
+ free(info->file);
+ info->file = NULL;
+ }
+ if (id) {
+ free(info->name);
+ info->name = NULL;
+ }
+ return -EINVAL;
+}
+
+static int read_master_file(struct snd_scenario *scn, FILE *f)
+{
+ int line = 0, ret = 0, i;
+ char buf[MAX_BUF], *tbuf;
+
+ /* parse master config sections */
+ while(fgets(buf, MAX_BUF, f) != NULL) {
+
+ if (buf[0] == '#') {
+ line++;
+ continue;
+ }
+
+ if (strncmp(buf, "Section", 7) == 0) {
+
+ tbuf = buf + 7;
+ while (isblank(*tbuf))
+ tbuf++;
+
+ if (strncmp(tbuf, "\"Scenario\"", 10) == 0) {
+ line = parse_scenario(scn, f, line);
+ if (line < 0) {
+ scn_error("%s: failed to parse "
+ "scenario\n", __func__);
+ goto err;
+ }
+ continue;
+ }
+ }
+ line++;
+ }
+
+ /* copy ptrs to scenario names */
+ scn->list = malloc(scn->num_scenarios * sizeof(char *));
+ if (scn->list == NULL)
+ ret = -ENOMEM;
+ for (i = 0; i < scn->num_scenarios; i++)
+ scn->list[i] = scn->scenario[i].name;
+
+err:
+ if (ferror(f)) {
+ scn_error("%s: failed to read master\n", __func__);
+ return ferror(f);
+ }
+ return ret;
+}
+
+/* load scenario i */
+static int import_master_config(struct snd_scenario *scn)
+{
+ int fd, ret;
+ FILE *f;
+ char filename[MAX_FILE];
+
+ sprintf(filename, "%s/%s.conf", ALSA_SCN_DIR, scn->card_name);
+
+ fd = open(filename, O_RDONLY | O_NOATIME);
+ if (fd < 0) {
+ scn_error("%s: couldn't open %s\n", __func__, filename);
+ return fd;
+ }
+
+ f = fdopen(fd, "r");
+ if (f == NULL) {
+ ret = errno;
+ goto close;
+ }
+
+ ret = read_master_file(scn, f);
+ fclose(f);
+close:
+ close(fd);
+ return ret;
+}
+
+/* parse_card_controls
+ * @scn: scenario
+ *
+ * Parse sound card and store control data in memory db.
+ */
+static int parse_card_controls(struct snd_scenario *scn)
+{
+ struct control_settings *control;
+ snd_ctl_t *handle;
+ snd_ctl_card_info_t *info;
+ snd_ctl_elem_list_t *list;
+ int ret, i;
+
+ snd_ctl_card_info_alloca(&info);
+ snd_ctl_elem_list_alloca(&list);
+
+ /* open and load snd card */
+ ret = snd_ctl_open(&handle, scn->card_name, SND_CTL_READONLY);
+ if (ret < 0) {
+ scn_error("%s: control %s open retor: %s\n", __func__,
+ scn->card_name, snd_strerror(ret));
+ return ret;
+ }
+
+ ret = snd_ctl_card_info(handle, info);
+ if (ret < 0) {
+ scn_error("%s :control %s local retor: %s\n", __func__,
+ scn->card_name, snd_strerror(ret));
+ goto close;
+ }
+
+ ret = snd_ctl_elem_list(handle, list);
+ if (ret < 0) {
+ scn_error("%s: cannot determine controls: %s\n", __func__,
+ snd_strerror(ret));
+ goto close;
+ }
+
+ scn->num_kcontrols = snd_ctl_elem_list_get_count(list);
+ if (scn->num_kcontrols < 0) {
+ ret = 0;
+ goto close;
+ }
+
+ snd_ctl_elem_list_set_offset(list, 0);
+ if (snd_ctl_elem_list_alloc_space(list, scn->num_kcontrols) < 0) {
+ scn_error("%s: not enough memory...\n", __func__);
+ ret = -ENOMEM;
+ goto close;
+ }
+ if ((ret = snd_ctl_elem_list(handle, list)) < 0) {
+ scn_error("%s: cannot determine controls: %s\n", __func__,
+ snd_strerror(ret));
+ goto free;
+ }
+
+ /* allocate db memory for controls */
+ scn->control = calloc(scn->num_kcontrols,
+ sizeof(struct control_settings));
+ if (scn->control == NULL) {
+ ret = -ENOMEM;
+ goto free;
+ }
+ control = scn->control;
+
+ /* iterate through each kcontrol and add to db */
+ for (i = 0; i < scn->num_kcontrols; ++i) {
+ snd_ctl_elem_id_t *id;
+ snd_ctl_elem_id_alloca(&id);
+ snd_ctl_elem_list_get_id(list, i, id);
+
+ ret = add_control(handle, id, control++);
+ if (ret < 0) {
+ scn_error("%s: failed to add control error %s\n",
+ __func__, snd_strerror(ret));
+ goto close;
+ }
+ }
+free:
+ snd_ctl_elem_list_free_space(list);
+close:
+ snd_ctl_close(handle);
+ return ret;
+}
+
+/* import_scenario_files -
+ * @scn: scenario
+ *
+ * Read and parse scenario_info files the store in memory.
+ */
+static int import_scenario_files(struct snd_scenario *scn)
+{
+ int ret;
+
+ ret = import_master_config(scn);
+ if (ret < 0) {
+ scn_error("%s: failed to parse master scenario config\n",
+ __func__);
+ return ret;
+ }
+
+ for (scn->current_scenario = 0;
+ scn->current_scenario < scn->num_scenarios;
+ scn->current_scenario++) {
+
+ ret = read_scenario_file(scn);
+ if (ret < 0) {
+ scn_error("%s: failed to parse scenario %s\n",
+ __func__,
+ scn->scenario[scn->current_scenario].name);
+ scn->current_scenario = -1;
+ return ret;
+ }
+
+ if (scn->scenario[scn->current_scenario].pre_sequence_file != NULL) {
+ ret = read_sequence_file(scn, PRE_SEQ);
+ if (ret < 0) {
+ scn_stdout("Warning: PreSequence file defined but"
+ " missing in scenario \"%s\"\n",
+ scn->scenario[scn->current_scenario].name);
+ }
+ }
+
+ if (scn->scenario[scn->current_scenario].post_sequence_file != NULL) {
+ ret = read_sequence_file(scn, POST_SEQ);
+ if (ret < 0) {
+ scn_stdout("Warning: PostSequence file defined but"
+ " missing in scenario \"%s\"\n",
+ scn->scenario[scn->current_scenario].name);
+ }
+ }
+
+ }
+ return 0;
+}
+
+/* free all resorces */
+static void free_scn(struct snd_scenario *scn)
+{
+ /* TODO: valgrind to make sure. */
+ int i;
+
+ if (scn == NULL)
+ return;
+
+ if (scn->control) {
+ if (scn->control->value)
+ free(scn->control->value);
+ free(scn->control);
+ }
+
+ if (scn->list)
+ free(scn->list);
+ if (scn->card_name)
+ free(scn->card_name);
+ if (scn->pre_seq_list)
+ free(scn->pre_seq_list);
+ if (scn->post_seq_list)
+ free(scn->post_seq_list);
+
+ if (scn->scenario) {
+ for (i = 0; i < scn->num_scenarios; i++) {
+ struct scenario_info *info = &scn->scenario[i];
+
+ if (info->name)
+ free(info->name);
+ if (info->file)
+ free(info->file);
+ if (info->pre_sequence_file)
+ free(info->pre_sequence_file);
+ if (info->post_sequence_file)
+ free(info->post_sequence_file);
+ }
+ free(scn->scenario);
+ }
+ free(scn);
+}
+
+/*
+ * Init sound card scenario db.
+ */
+struct snd_scenario *snd_scenario_open(const char *card_name)
+{
+ struct snd_scenario *scn;
+ int err;
+
+ /* TODO: locking and
+ * check if card_name scn is already loaded,
+ * if so reuse to conserve ram. */
+
+ scn = malloc(sizeof(struct snd_scenario));
+ if (scn == NULL)
+ return NULL;
+ bzero(scn, sizeof(struct snd_scenario));
+ scn->card_name = strdup(card_name);
+ if (scn->card_name == NULL) {
+ free(scn);
+ return NULL;
+ }
+
+ /* get info about sound card */
+ err = parse_card_controls(scn);
+ if (err < 0) {
+ free_scn(scn);
+ return NULL;
+ }
+
+ /* get info on scenarios and verify against card */
+ err = import_scenario_files(scn);
+ if (err < 0) {
+ free_scn(scn);
+ return NULL;
+ }
+
+ return scn;
+}
+
+/*
+ * Reload and reparse scenario db.
+ */
+int snd_scenario_reload(struct snd_scenario *scn)
+{
+ free_scn(scn);
+
+ scn->num_kcontrols = parse_card_controls(scn);
+ if (scn->num_kcontrols <= 0) {
+ free_scn(scn);
+ return -EINVAL;
+ }
+
+ scn->num_scenarios = import_scenario_files(scn);
+ if (scn->num_scenarios <= 0) {
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+void snd_scenario_close(struct snd_scenario *scn)
+{
+ free_scn(scn);
+}
+
+static int set_control(snd_ctl_t *handle, snd_ctl_elem_id_t *id,
+ struct snd_scenario *scn)
+{
+ struct control_settings *setting;
+ int ret, count, i, idnum;
+ snd_ctl_elem_info_t *info;
+ snd_ctl_elem_type_t type;
+ snd_ctl_elem_value_t *control;
+
+ snd_ctl_elem_info_alloca(&info);
+ snd_ctl_elem_value_alloca(&control);
+
+ snd_ctl_elem_info_set_id(info, id);
+ ret = snd_ctl_elem_info(handle, info);
+ if (ret < 0) {
+ scn_error("%s: failed to get ctl info\n", __func__);
+ return ret;
+ }
+
+ snd_ctl_elem_value_set_id(control, id);
+ snd_ctl_elem_read(handle, control);
+
+ idnum = snd_ctl_elem_id_get_numid(id);
+ for (i = 0; i < scn->num_kcontrols; i++) {
+ setting = &scn->control[i];
+ if (setting->id == idnum)
+ goto set_val;
+ }
+ scn_error("%s: failed to find control %d\n", __func__, idnum);
+ return 0;
+
+set_val:
+ type = snd_ctl_elem_info_get_type(info);
+ count = snd_ctl_elem_info_get_count(info);
+ if (count == 0)
+ return 0;
+
+ switch (type) {
+ case SND_CTL_ELEM_TYPE_BOOLEAN:
+ for (i = 0; i < count; i++)
+ snd_ctl_elem_value_set_boolean(control, i,
+ get_value(scn, setting, i));
+ break;
+ case SND_CTL_ELEM_TYPE_INTEGER:
+ for (i = 0; i < count; i++)
+ snd_ctl_elem_value_set_integer(control, i,
+ get_value(scn, setting, i));
+
+ break;
+ case SND_CTL_ELEM_TYPE_INTEGER64:
+ for (i = 0; i < count; i++)
+ snd_ctl_elem_value_set_integer64(control, i,
+ get_value(scn, setting, i));
+
+ break;
+ case SND_CTL_ELEM_TYPE_ENUMERATED:
+ for (i = 0; i < count; i++)
+ snd_ctl_elem_value_set_enumerated(control, i,
+ get_value(scn, setting, i));
+
+ break;
+ case SND_CTL_ELEM_TYPE_BYTES:
+ for (i = 0; i < count; i++)
+ snd_ctl_elem_value_set_byte(control, i,
+ get_value(scn, setting, i));
+ break;
+ default:
+ break;
+ }
+
+ ret = snd_ctl_elem_write(handle, control);
+ if (ret < 0) {
+ scn_error("%s: control %s failed: %s\n", __func__,
+ setting->name, snd_strerror(ret));
+ scn_error("%s: count %d type: %d\n", __func__,
+ count, type);
+ for (i = 0; i < count; i++)
+ fprintf(stderr, "%d ", get_value(scn, setting, i));
+ return ret;
+ }
+ return 0;
+}
+
+static void exec_sequence(struct sequence_element *seq, struct snd_scenario
+ *scn, snd_ctl_elem_list_t *list, snd_ctl_t *handle)
+{
+ int count = snd_ctl_elem_list_get_count(list);
+ while (seq) {
+ if (seq->sleep)
+ usleep(seq->sleep);
+ else {
+ snd_ctl_elem_id_t *id;
+ snd_ctl_elem_id_alloca(&id);
+ int ret, i, numid;
+ /* Where is id lookup from numid if you need it? */
+ for (i = 0; i < count; ++i) {
+ snd_ctl_elem_list_get_id(list, i, id);
+ numid = snd_ctl_elem_id_get_numid(id);
+ if (numid == seq->control->id) {
+ ret = set_control(handle, id, scn);
+ if (ret < 0) {
+ scn_error("%s: failed to set control %s\n",
+ __func__, scn->card_name);
+ }
+ break;
+ }
+ }
+ }
+ seq = seq->next;
+ }
+}
+
+int snd_scenario_set_scn(struct snd_scenario *scn, const char *name)
+{
+ snd_ctl_card_info_t *info;
+ snd_ctl_elem_list_t *list;
+ snd_ctl_t *handle;
+ int ret, count, i;
+
+ snd_ctl_card_info_alloca(&info);
+ snd_ctl_elem_list_alloca(&list);
+
+ /* find scenario name */
+ for (i = 0; i < scn->num_scenarios; i++) {
+ if (!strcmp(scn->scenario[i].name, name))
+ goto found;
+ }
+ scn_error("%s: scenario %s not found\n", __func__, name);
+ return -EINVAL;
+
+found:
+ /* scenario found - now open card */
+ scn->current_scenario = i;
+ ret = snd_ctl_open(&handle, scn->card_name, 0);
+ if (ret) {
+ scn_error("%s: control %s open error: %s\n", __func__,
+ scn->card_name, snd_strerror(ret));
+ return ret;
+ }
+
+ ret = snd_ctl_card_info(handle, info);
+ if (ret < 0) {
+ scn_error("%s :control %s local retor: %s\n", __func__,
+ scn->card_name, snd_strerror(ret));
+ goto close;
+ }
+
+ ret = snd_ctl_elem_list(handle, list);
+ if (ret < 0) {
+ scn_error("%s: cannot determine controls: %s\n", __func__,
+ snd_strerror(ret));
+ goto close;
+ }
+
+ count = snd_ctl_elem_list_get_count(list);
+ if (count < 0) {
+ ret = 0;
+ goto close;
+ }
+
+ snd_ctl_elem_list_set_offset(list, 0);
+ if (snd_ctl_elem_list_alloc_space(list, count) < 0) {
+ scn_error("%s: not enough memory...\n", __func__);
+ ret = -ENOMEM;
+ goto close;
+ }
+ if ((ret = snd_ctl_elem_list(handle, list)) < 0) {
+ scn_error("%s: cannot determine controls: %s\n", __func__,
+ snd_strerror(ret));
+ goto free;
+ }
+
+ /* If we have a sequence list that should be executed before the new
+ * scenario is set do it now */
+ if (scn->pre_seq_list)
+ exec_sequence(scn->pre_seq_list, scn, list, handle);
+
+ /* iterate through each kcontrol and add to db */
+ for (i = 0; i < count; ++i) {
+ snd_ctl_elem_id_t *id;
+ snd_ctl_elem_id_alloca(&id);
+ snd_ctl_elem_list_get_id(list, i, id);
+
+ ret = set_control(handle, id, scn);
+ if (ret < 0) {
+ scn_error("%s: failed to set control %s\n", __func__,
+ scn->card_name);
+ }
+ }
+
+ /* If we have a sequence list that should be executed after the new
+ * scenario is set do it now */
+ if (scn->post_seq_list)
+ exec_sequence(scn->post_seq_list, scn, list, handle);
+
+free:
+ snd_ctl_elem_list_free_space(list);
+close:
+ snd_ctl_close(handle);
+ return ret;
+}
+
+int snd_scenario_dump(const char *card_name)
+{
+ snd_ctl_t *handle;
+ snd_ctl_card_info_t *info;
+ snd_ctl_elem_list_t *list;
+ int ret, i, count;
+
+ snd_ctl_card_info_alloca(&info);
+ snd_ctl_elem_list_alloca(&list);
+
+ /* open and load snd card */
+ ret = snd_ctl_open(&handle, card_name, SND_CTL_READONLY);
+ if (ret < 0) {
+ scn_error("%s: control %s open retor: %s\n", __func__, card_name,
+ snd_strerror(ret));
+ return ret;
+ }
+
+ ret = snd_ctl_card_info(handle, info);
+ if (ret < 0) {
+ scn_error("%s :control %s local retor: %s\n", __func__,
+ card_name, snd_strerror(ret));
+ goto close;
+ }
+
+ ret = snd_ctl_elem_list(handle, list);
+ if (ret < 0) {
+ scn_error("%s: cannot determine controls: %s\n", __func__,
+ snd_strerror(ret));
+ goto close;
+ }
+
+ count = snd_ctl_elem_list_get_count(list);
+ if (count < 0) {
+ ret = 0;
+ goto close;
+ }
+
+ snd_ctl_elem_list_set_offset(list, 0);
+ if (snd_ctl_elem_list_alloc_space(list, count) < 0) {
+ scn_error("%s: not enough memory...\n", __func__);
+ ret = -ENOMEM;
+ goto close;
+ }
+ if ((ret = snd_ctl_elem_list(handle, list)) < 0) {
+ scn_error("%s: cannot determine controls: %s\n", __func__,
+ snd_strerror(ret));
+ goto free;
+ }
+
+ /* iterate through each kcontrol and add to db */
+ for (i = 0; i < count; ++i) {
+ snd_ctl_elem_id_t *id;
+ snd_ctl_elem_id_alloca(&id);
+ snd_ctl_elem_list_get_id(list, i, id);
+
+ ret = dump_control(handle, id);
+ if (ret < 0) {
+ scn_error("%s: cannot determine controls: %s\n",
+ __func__, snd_strerror(ret));
+ goto free;
+ }
+ }
+free:
+ snd_ctl_elem_list_free_space(list);
+close:
+ snd_ctl_close(handle);
+ return ret;
+}
+
+const char *snd_scenario_get_scn(struct snd_scenario *scn)
+{
+ if (scn->current_scenario > 0 && scn->current_scenario < MAX_SCN)
+ return scn->scenario[scn->current_scenario].name;
+ else
+ return NULL;
+}
+
+int snd_scenario_set_qos(struct snd_scenario *scn, int qos)
+{
+ /* TODO: change QoS kcontrols */
+ scn->scenario[scn->current_scenario].qos = qos;
+ return 0;
+}
+
+int snd_scenario_get_qos(struct snd_scenario *scn)
+{
+ return scn->scenario[scn->current_scenario].qos;
+}
+
+int snd_scenario_get_master_playback_volume(struct snd_scenario *scn)
+{
+ return scn->scenario[scn->current_scenario].playback_volume_id;
+}
+
+int snd_scenario_get_master_playback_switch(struct snd_scenario *scn)
+{
+ return scn->scenario[scn->current_scenario].playback_switch_id;
+}
+
+int snd_scenario_get_master_capture_volume(struct snd_scenario *scn)
+{
+ return scn->scenario[scn->current_scenario].capture_volume_id;
+}
+
+int snd_scenario_get_master_capture_switch(struct snd_scenario *scn)
+{
+ return scn->scenario[scn->current_scenario].capture_switch_id;
+}
+
+int snd_scenario_list(struct snd_scenario *scn, const char **list[])
+{
+ *list = scn->list;
+ return scn->num_scenarios;
+}
--
1.6.4.3
regards
Stefan Schmidt
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