Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C) 2013 The Android Open Source Project |
| 3 | * Inspired by TinyHW, written by Mark Brown at Wolfson Micro |
| 4 | * |
| 5 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * you may not use this file except in compliance with the License. |
| 7 | * You may obtain a copy of the License at |
| 8 | * |
| 9 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * |
| 11 | * Unless required by applicable law or agreed to in writing, software |
| 12 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * See the License for the specific language governing permissions and |
| 15 | * limitations under the License. |
| 16 | */ |
| 17 | |
| 18 | #define LOG_TAG "audio_route" |
| 19 | /*#define LOG_NDEBUG 0*/ |
| 20 | |
| 21 | #include <errno.h> |
| 22 | #include <expat.h> |
| 23 | #include <stdbool.h> |
| 24 | #include <stdio.h> |
| 25 | #include <string.h> |
| 26 | |
| 27 | #include <cutils/log.h> |
| 28 | |
| 29 | #include <tinyalsa/asoundlib.h> |
| 30 | |
| 31 | #define BUF_SIZE 1024 |
| 32 | #define MIXER_XML_PATH "/system/etc/mixer_paths.xml" |
| 33 | #define INITIAL_MIXER_PATH_SIZE 8 |
| 34 | |
| 35 | struct mixer_state { |
| 36 | struct mixer_ctl *ctl; |
| 37 | unsigned int num_values; |
| 38 | int *old_value; |
| 39 | int *new_value; |
| 40 | int *reset_value; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 41 | }; |
| 42 | |
| 43 | struct mixer_setting { |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 44 | unsigned int ctl_index; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 45 | unsigned int num_values; |
| 46 | int *value; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 47 | }; |
| 48 | |
| 49 | struct mixer_value { |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 50 | unsigned int ctl_index; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 51 | int index; |
| 52 | int value; |
| 53 | }; |
| 54 | |
| 55 | struct mixer_path { |
| 56 | char *name; |
| 57 | unsigned int size; |
| 58 | unsigned int length; |
| 59 | struct mixer_setting *setting; |
| 60 | }; |
| 61 | |
| 62 | struct audio_route { |
| 63 | struct mixer *mixer; |
| 64 | unsigned int num_mixer_ctls; |
| 65 | struct mixer_state *mixer_state; |
| 66 | |
| 67 | unsigned int mixer_path_size; |
| 68 | unsigned int num_mixer_paths; |
| 69 | struct mixer_path *mixer_path; |
| 70 | }; |
| 71 | |
| 72 | struct config_parse_state { |
| 73 | struct audio_route *ar; |
| 74 | struct mixer_path *path; |
| 75 | int level; |
| 76 | }; |
| 77 | |
| 78 | /* path functions */ |
| 79 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 80 | static inline struct mixer_ctl *index_to_ctl(struct audio_route *ar, |
| 81 | unsigned int ctl_index) |
| 82 | { |
| 83 | return ar->mixer_state[ctl_index].ctl; |
| 84 | } |
| 85 | |
| 86 | static void path_print(struct audio_route *ar, struct mixer_path *path) |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 87 | { |
| 88 | unsigned int i; |
| 89 | unsigned int j; |
| 90 | |
| 91 | ALOGE("Path: %s, length: %d", path->name, path->length); |
| 92 | for (i = 0; i < path->length; i++) { |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 93 | struct mixer_ctl *ctl = index_to_ctl(ar, path->setting[i].ctl_index); |
| 94 | |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 95 | ALOGE(" id=%d: ctl=%s", i, mixer_ctl_get_name(ctl)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 96 | for (j = 0; j < path->setting[i].num_values; j++) |
| 97 | ALOGE(" id=%d value=%d", j, path->setting[i].value[j]); |
| 98 | } |
| 99 | } |
| 100 | |
| 101 | static void path_free(struct audio_route *ar) |
| 102 | { |
| 103 | unsigned int i; |
| 104 | |
| 105 | for (i = 0; i < ar->num_mixer_paths; i++) { |
| 106 | if (ar->mixer_path[i].name) |
| 107 | free(ar->mixer_path[i].name); |
| 108 | if (ar->mixer_path[i].setting) { |
| 109 | if (ar->mixer_path[i].setting->value) |
| 110 | free(ar->mixer_path[i].setting->value); |
| 111 | free(ar->mixer_path[i].setting); |
| 112 | } |
| 113 | } |
| 114 | free(ar->mixer_path); |
| 115 | } |
| 116 | |
| 117 | static struct mixer_path *path_get_by_name(struct audio_route *ar, |
| 118 | const char *name) |
| 119 | { |
| 120 | unsigned int i; |
| 121 | |
| 122 | for (i = 0; i < ar->num_mixer_paths; i++) |
| 123 | if (strcmp(ar->mixer_path[i].name, name) == 0) |
| 124 | return &ar->mixer_path[i]; |
| 125 | |
| 126 | return NULL; |
| 127 | } |
| 128 | |
| 129 | static struct mixer_path *path_create(struct audio_route *ar, const char *name) |
| 130 | { |
| 131 | struct mixer_path *new_mixer_path = NULL; |
| 132 | |
| 133 | if (path_get_by_name(ar, name)) { |
| 134 | ALOGE("Path name '%s' already exists", name); |
| 135 | return NULL; |
| 136 | } |
| 137 | |
| 138 | /* check if we need to allocate more space for mixer paths */ |
| 139 | if (ar->mixer_path_size <= ar->num_mixer_paths) { |
| 140 | if (ar->mixer_path_size == 0) |
| 141 | ar->mixer_path_size = INITIAL_MIXER_PATH_SIZE; |
| 142 | else |
| 143 | ar->mixer_path_size *= 2; |
| 144 | |
| 145 | new_mixer_path = realloc(ar->mixer_path, ar->mixer_path_size * |
| 146 | sizeof(struct mixer_path)); |
| 147 | if (new_mixer_path == NULL) { |
| 148 | ALOGE("Unable to allocate more paths"); |
| 149 | return NULL; |
| 150 | } else { |
| 151 | ar->mixer_path = new_mixer_path; |
| 152 | } |
| 153 | } |
| 154 | |
| 155 | /* initialise the new mixer path */ |
| 156 | ar->mixer_path[ar->num_mixer_paths].name = strdup(name); |
| 157 | ar->mixer_path[ar->num_mixer_paths].size = 0; |
| 158 | ar->mixer_path[ar->num_mixer_paths].length = 0; |
| 159 | ar->mixer_path[ar->num_mixer_paths].setting = NULL; |
| 160 | |
| 161 | /* return the mixer path just added, then increment number of them */ |
| 162 | return &ar->mixer_path[ar->num_mixer_paths++]; |
| 163 | } |
| 164 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 165 | static int find_ctl_index_in_path(struct mixer_path *path, |
| 166 | unsigned int ctl_index) |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 167 | { |
| 168 | unsigned int i; |
| 169 | |
| 170 | for (i = 0; i < path->length; i++) |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 171 | if (path->setting[i].ctl_index == ctl_index) |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 172 | return i; |
| 173 | |
| 174 | return -1; |
| 175 | } |
| 176 | |
| 177 | static int alloc_path_setting(struct mixer_path *path) |
| 178 | { |
| 179 | struct mixer_setting *new_path_setting; |
| 180 | int path_index; |
| 181 | |
| 182 | /* check if we need to allocate more space for path settings */ |
| 183 | if (path->size <= path->length) { |
| 184 | if (path->size == 0) |
| 185 | path->size = INITIAL_MIXER_PATH_SIZE; |
| 186 | else |
| 187 | path->size *= 2; |
| 188 | |
| 189 | new_path_setting = realloc(path->setting, |
| 190 | path->size * sizeof(struct mixer_setting)); |
| 191 | if (new_path_setting == NULL) { |
| 192 | ALOGE("Unable to allocate more path settings"); |
| 193 | return -1; |
| 194 | } else { |
| 195 | path->setting = new_path_setting; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | path_index = path->length; |
| 200 | path->length++; |
| 201 | |
| 202 | return path_index; |
| 203 | } |
| 204 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 205 | static int path_add_setting(struct audio_route *ar, struct mixer_path *path, |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 206 | struct mixer_setting *setting) |
| 207 | { |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 208 | int path_index; |
| 209 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 210 | if (find_ctl_index_in_path(path, setting->ctl_index) != -1) { |
| 211 | struct mixer_ctl *ctl = index_to_ctl(ar, setting->ctl_index); |
| 212 | |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 213 | ALOGE("Control '%s' already exists in path '%s'", |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 214 | mixer_ctl_get_name(ctl), path->name); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 215 | return -1; |
| 216 | } |
| 217 | |
| 218 | path_index = alloc_path_setting(path); |
| 219 | if (path_index < 0) |
| 220 | return -1; |
| 221 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 222 | path->setting[path_index].ctl_index = setting->ctl_index; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 223 | path->setting[path_index].num_values = setting->num_values; |
| 224 | path->setting[path_index].value = malloc(setting->num_values * sizeof(int)); |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 225 | /* copy all values */ |
| 226 | memcpy(path->setting[path_index].value, setting->value, |
| 227 | setting->num_values * sizeof(int)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 228 | |
| 229 | return 0; |
| 230 | } |
| 231 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 232 | static int path_add_value(struct audio_route *ar, struct mixer_path *path, |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 233 | struct mixer_value *mixer_value) |
| 234 | { |
| 235 | unsigned int i; |
| 236 | int path_index; |
| 237 | unsigned int num_values; |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 238 | struct mixer_ctl *ctl; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 239 | |
| 240 | /* Check that mixer value index is within range */ |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 241 | ctl = index_to_ctl(ar, mixer_value->ctl_index); |
| 242 | num_values = mixer_ctl_get_num_values(ctl); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 243 | if (mixer_value->index >= (int)num_values) { |
| 244 | ALOGE("mixer index %d is out of range for '%s'", mixer_value->index, |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 245 | mixer_ctl_get_name(ctl)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 246 | return -1; |
| 247 | } |
| 248 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 249 | path_index = find_ctl_index_in_path(path, mixer_value->ctl_index); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 250 | if (path_index < 0) { |
| 251 | /* New path */ |
| 252 | |
| 253 | path_index = alloc_path_setting(path); |
| 254 | if (path_index < 0) |
| 255 | return -1; |
| 256 | |
| 257 | /* initialise the new path setting */ |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 258 | path->setting[path_index].ctl_index = mixer_value->ctl_index; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 259 | path->setting[path_index].num_values = num_values; |
| 260 | path->setting[path_index].value = malloc(num_values * sizeof(int)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 261 | path->setting[path_index].value[0] = mixer_value->value; |
| 262 | } |
| 263 | |
| 264 | if (mixer_value->index == -1) { |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 265 | /* set all values the same */ |
| 266 | for (i = 0; i < num_values; i++) |
| 267 | path->setting[path_index].value[i] = mixer_value->value; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 268 | } else { |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 269 | /* set only one value */ |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 270 | path->setting[path_index].value[mixer_value->index] = mixer_value->value; |
| 271 | } |
| 272 | |
| 273 | return 0; |
| 274 | } |
| 275 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 276 | static int path_add_path(struct audio_route *ar, struct mixer_path *path, |
| 277 | struct mixer_path *sub_path) |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 278 | { |
| 279 | unsigned int i; |
| 280 | |
| 281 | for (i = 0; i < sub_path->length; i++) |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 282 | if (path_add_setting(ar, path, &sub_path->setting[i]) < 0) |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 283 | return -1; |
| 284 | |
| 285 | return 0; |
| 286 | } |
| 287 | |
| 288 | static int path_apply(struct audio_route *ar, struct mixer_path *path) |
| 289 | { |
| 290 | unsigned int i; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 291 | unsigned int ctl_index; |
| 292 | |
| 293 | for (i = 0; i < path->length; i++) { |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 294 | ctl_index = path->setting[i].ctl_index; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 295 | |
| 296 | /* apply the new value(s) */ |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 297 | memcpy(ar->mixer_state[ctl_index].new_value, path->setting[i].value, |
| 298 | path->setting[i].num_values * sizeof(int)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 299 | } |
| 300 | |
| 301 | return 0; |
| 302 | } |
| 303 | |
Ravi Kumar Alamanda | 72c277e | 2013-02-08 07:41:07 -0800 | [diff] [blame] | 304 | static int path_reset(struct audio_route *ar, struct mixer_path *path) |
| 305 | { |
| 306 | unsigned int i; |
| 307 | unsigned int j; |
| 308 | unsigned int ctl_index; |
| 309 | |
| 310 | for (i = 0; i < path->length; i++) { |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 311 | ctl_index = path->setting[i].ctl_index; |
Ravi Kumar Alamanda | 72c277e | 2013-02-08 07:41:07 -0800 | [diff] [blame] | 312 | |
| 313 | /* reset the value(s) */ |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 314 | memcpy(ar->mixer_state[ctl_index].new_value, |
| 315 | ar->mixer_state[ctl_index].reset_value, |
| 316 | ar->mixer_state[ctl_index].num_values * sizeof(int)); |
Ravi Kumar Alamanda | 72c277e | 2013-02-08 07:41:07 -0800 | [diff] [blame] | 317 | } |
| 318 | |
| 319 | return 0; |
| 320 | } |
| 321 | |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 322 | /* mixer helper function */ |
| 323 | static int mixer_enum_string_to_value(struct mixer_ctl *ctl, const char *string) |
| 324 | { |
| 325 | unsigned int i; |
| 326 | |
| 327 | /* Search the enum strings for a particular one */ |
| 328 | for (i = 0; i < mixer_ctl_get_num_enums(ctl); i++) { |
| 329 | if (strcmp(mixer_ctl_get_enum_string(ctl, i), string) == 0) |
| 330 | break; |
| 331 | } |
| 332 | |
| 333 | return i; |
| 334 | } |
| 335 | |
| 336 | static void start_tag(void *data, const XML_Char *tag_name, |
| 337 | const XML_Char **attr) |
| 338 | { |
| 339 | const XML_Char *attr_name = NULL; |
| 340 | const XML_Char *attr_id = NULL; |
| 341 | const XML_Char *attr_value = NULL; |
| 342 | struct config_parse_state *state = data; |
| 343 | struct audio_route *ar = state->ar; |
| 344 | unsigned int i; |
| 345 | unsigned int ctl_index; |
| 346 | struct mixer_ctl *ctl; |
| 347 | int value; |
| 348 | unsigned int id; |
| 349 | struct mixer_value mixer_value; |
| 350 | |
| 351 | /* Get name, id and value attributes (these may be empty) */ |
| 352 | for (i = 0; attr[i]; i += 2) { |
| 353 | if (strcmp(attr[i], "name") == 0) |
| 354 | attr_name = attr[i + 1]; |
| 355 | if (strcmp(attr[i], "id") == 0) |
| 356 | attr_id = attr[i + 1]; |
| 357 | else if (strcmp(attr[i], "value") == 0) |
| 358 | attr_value = attr[i + 1]; |
| 359 | } |
| 360 | |
| 361 | /* Look at tags */ |
| 362 | if (strcmp(tag_name, "path") == 0) { |
| 363 | if (attr_name == NULL) { |
| 364 | ALOGE("Unnamed path!"); |
| 365 | } else { |
| 366 | if (state->level == 1) { |
| 367 | /* top level path: create and stash the path */ |
| 368 | state->path = path_create(ar, (char *)attr_name); |
| 369 | } else { |
| 370 | /* nested path */ |
| 371 | struct mixer_path *sub_path = path_get_by_name(ar, attr_name); |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 372 | path_add_path(ar, state->path, sub_path); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 373 | } |
| 374 | } |
| 375 | } |
| 376 | |
| 377 | else if (strcmp(tag_name, "ctl") == 0) { |
| 378 | /* Obtain the mixer ctl and value */ |
| 379 | ctl = mixer_get_ctl_by_name(ar->mixer, attr_name); |
Simon Wilson | d35bd63 | 2013-05-13 12:47:41 -0700 | [diff] [blame] | 380 | if (ctl == NULL) { |
| 381 | ALOGE("Control '%s' doesn't exist - skipping", attr_name); |
| 382 | goto done; |
| 383 | } |
| 384 | |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 385 | switch (mixer_ctl_get_type(ctl)) { |
| 386 | case MIXER_CTL_TYPE_BOOL: |
| 387 | case MIXER_CTL_TYPE_INT: |
| 388 | value = atoi((char *)attr_value); |
| 389 | break; |
| 390 | case MIXER_CTL_TYPE_ENUM: |
| 391 | value = mixer_enum_string_to_value(ctl, (char *)attr_value); |
| 392 | break; |
| 393 | default: |
| 394 | value = 0; |
| 395 | break; |
| 396 | } |
| 397 | |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 398 | /* locate the mixer ctl in the list */ |
| 399 | for (ctl_index = 0; ctl_index < ar->num_mixer_ctls; ctl_index++) { |
| 400 | if (ar->mixer_state[ctl_index].ctl == ctl) |
| 401 | break; |
| 402 | } |
| 403 | |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 404 | if (state->level == 1) { |
| 405 | /* top level ctl (initial setting) */ |
| 406 | |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 407 | /* apply the new value */ |
| 408 | if (attr_id) { |
| 409 | /* set only one value */ |
| 410 | id = atoi((char *)attr_id); |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 411 | if (id < ar->mixer_state[ctl_index].num_values) |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 412 | ar->mixer_state[ctl_index].new_value[id] = value; |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 413 | else |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 414 | ALOGE("value id out of range for mixer ctl '%s'", |
| 415 | mixer_ctl_get_name(ctl)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 416 | } else { |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 417 | /* set all values the same */ |
| 418 | for (i = 0; i < ar->mixer_state[ctl_index].num_values; i++) |
| 419 | ar->mixer_state[ctl_index].new_value[i] = value; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 420 | } |
| 421 | } else { |
| 422 | /* nested ctl (within a path) */ |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 423 | mixer_value.ctl_index = ctl_index; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 424 | mixer_value.value = value; |
| 425 | if (attr_id) |
| 426 | mixer_value.index = atoi((char *)attr_id); |
| 427 | else |
| 428 | mixer_value.index = -1; |
Simon Wilson | f3090fa | 2013-02-12 16:41:52 -0800 | [diff] [blame] | 429 | path_add_value(ar, state->path, &mixer_value); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 430 | } |
| 431 | } |
| 432 | |
Simon Wilson | d35bd63 | 2013-05-13 12:47:41 -0700 | [diff] [blame] | 433 | done: |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 434 | state->level++; |
| 435 | } |
| 436 | |
| 437 | static void end_tag(void *data, const XML_Char *tag_name) |
| 438 | { |
| 439 | struct config_parse_state *state = data; |
| 440 | |
| 441 | state->level--; |
| 442 | } |
| 443 | |
| 444 | static int alloc_mixer_state(struct audio_route *ar) |
| 445 | { |
| 446 | unsigned int i; |
| 447 | unsigned int j; |
| 448 | unsigned int num_values; |
| 449 | struct mixer_ctl *ctl; |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 450 | enum mixer_ctl_type type; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 451 | |
| 452 | ar->num_mixer_ctls = mixer_get_num_ctls(ar->mixer); |
| 453 | ar->mixer_state = malloc(ar->num_mixer_ctls * sizeof(struct mixer_state)); |
| 454 | if (!ar->mixer_state) |
| 455 | return -1; |
| 456 | |
| 457 | for (i = 0; i < ar->num_mixer_ctls; i++) { |
| 458 | ctl = mixer_get_ctl(ar->mixer, i); |
| 459 | num_values = mixer_ctl_get_num_values(ctl); |
| 460 | |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 461 | ar->mixer_state[i].ctl = ctl; |
| 462 | ar->mixer_state[i].num_values = num_values; |
| 463 | |
| 464 | /* Skip unsupported types that are not supported yet in XML */ |
| 465 | type = mixer_ctl_get_type(ctl); |
| 466 | if ((type != MIXER_CTL_TYPE_BOOL) && (type != MIXER_CTL_TYPE_INT) && |
| 467 | (type != MIXER_CTL_TYPE_ENUM)) |
| 468 | continue; |
| 469 | |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 470 | ar->mixer_state[i].old_value = malloc(num_values * sizeof(int)); |
| 471 | ar->mixer_state[i].new_value = malloc(num_values * sizeof(int)); |
| 472 | ar->mixer_state[i].reset_value = malloc(num_values * sizeof(int)); |
| 473 | |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 474 | if (type == MIXER_CTL_TYPE_ENUM) |
| 475 | ar->mixer_state[i].old_value[0] = mixer_ctl_get_value(ctl, 0); |
| 476 | else |
| 477 | mixer_ctl_get_array(ctl, ar->mixer_state[i].old_value, num_values); |
| 478 | memcpy(ar->mixer_state[i].new_value, ar->mixer_state[i].old_value, |
| 479 | num_values * sizeof(int)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 480 | } |
| 481 | |
| 482 | return 0; |
| 483 | } |
| 484 | |
| 485 | static void free_mixer_state(struct audio_route *ar) |
| 486 | { |
| 487 | unsigned int i; |
| 488 | |
| 489 | for (i = 0; i < ar->num_mixer_ctls; i++) { |
| 490 | free(ar->mixer_state[i].old_value); |
| 491 | free(ar->mixer_state[i].new_value); |
| 492 | free(ar->mixer_state[i].reset_value); |
| 493 | } |
| 494 | |
| 495 | free(ar->mixer_state); |
| 496 | ar->mixer_state = NULL; |
| 497 | } |
| 498 | |
| 499 | /* Update the mixer with any changed values */ |
| 500 | int audio_route_update_mixer(struct audio_route *ar) |
| 501 | { |
| 502 | unsigned int i; |
| 503 | unsigned int j; |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 504 | struct mixer_ctl *ctl; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 505 | |
| 506 | for (i = 0; i < ar->num_mixer_ctls; i++) { |
| 507 | unsigned int num_values = ar->mixer_state[i].num_values; |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 508 | enum mixer_ctl_type type; |
| 509 | |
| 510 | ctl = ar->mixer_state[i].ctl; |
| 511 | |
| 512 | /* Skip unsupported types */ |
| 513 | type = mixer_ctl_get_type(ctl); |
| 514 | if ((type != MIXER_CTL_TYPE_BOOL) && (type != MIXER_CTL_TYPE_INT) && |
| 515 | (type != MIXER_CTL_TYPE_ENUM)) |
| 516 | continue; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 517 | |
| 518 | /* if the value has changed, update the mixer */ |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 519 | bool changed = false; |
| 520 | for (j = 0; j < num_values; j++) { |
| 521 | if (ar->mixer_state[i].old_value[j] != ar->mixer_state[i].new_value[j]) { |
| 522 | changed = true; |
| 523 | break; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 524 | } |
| 525 | } |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 526 | if (changed) { |
| 527 | if (type == MIXER_CTL_TYPE_ENUM) |
| 528 | mixer_ctl_set_value(ctl, 0, ar->mixer_state[i].new_value[0]); |
| 529 | else |
| 530 | mixer_ctl_set_array(ctl, ar->mixer_state[i].new_value, num_values); |
| 531 | memcpy(ar->mixer_state[i].old_value, ar->mixer_state[i].new_value, |
| 532 | num_values * sizeof(int)); |
| 533 | } |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 534 | } |
| 535 | |
| 536 | return 0; |
| 537 | } |
| 538 | |
| 539 | /* saves the current state of the mixer, for resetting all controls */ |
| 540 | static void save_mixer_state(struct audio_route *ar) |
| 541 | { |
| 542 | unsigned int i; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 543 | |
| 544 | for (i = 0; i < ar->num_mixer_ctls; i++) { |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 545 | memcpy(ar->mixer_state[i].reset_value, ar->mixer_state[i].new_value, |
| 546 | ar->mixer_state[i].num_values * sizeof(int)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 547 | } |
| 548 | } |
| 549 | |
| 550 | /* Reset the audio routes back to the initial state */ |
| 551 | void audio_route_reset(struct audio_route *ar) |
| 552 | { |
| 553 | unsigned int i; |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 554 | |
| 555 | /* load all of the saved values */ |
| 556 | for (i = 0; i < ar->num_mixer_ctls; i++) { |
Ravi Kumar Alamanda | 63b31c1 | 2013-05-24 18:02:24 -0700 | [diff] [blame^] | 557 | memcpy(ar->mixer_state[i].new_value, ar->mixer_state[i].reset_value, |
| 558 | ar->mixer_state[i].num_values * sizeof(int)); |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 559 | } |
| 560 | } |
| 561 | |
| 562 | /* Apply an audio route path by name */ |
| 563 | int audio_route_apply_path(struct audio_route *ar, const char *name) |
| 564 | { |
| 565 | struct mixer_path *path; |
| 566 | |
| 567 | if (!ar) { |
| 568 | ALOGE("invalid audio_route"); |
| 569 | return -1; |
| 570 | } |
| 571 | |
| 572 | path = path_get_by_name(ar, name); |
| 573 | if (!path) { |
| 574 | ALOGE("unable to find path '%s'", name); |
| 575 | return -1; |
| 576 | } |
| 577 | |
| 578 | path_apply(ar, path); |
| 579 | |
| 580 | return 0; |
| 581 | } |
| 582 | |
Ravi Kumar Alamanda | 72c277e | 2013-02-08 07:41:07 -0800 | [diff] [blame] | 583 | /* Reset an audio route path by name */ |
| 584 | int audio_route_reset_path(struct audio_route *ar, const char *name) |
| 585 | { |
| 586 | struct mixer_path *path; |
| 587 | |
| 588 | if (!ar) { |
| 589 | ALOGE("invalid audio_route"); |
| 590 | return -1; |
| 591 | } |
| 592 | |
| 593 | path = path_get_by_name(ar, name); |
| 594 | if (!path) { |
| 595 | ALOGE("unable to find path '%s'", name); |
| 596 | return -1; |
| 597 | } |
| 598 | |
| 599 | path_reset(ar, path); |
| 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | |
Simon Wilson | cef9359 | 2013-01-15 16:35:46 -0800 | [diff] [blame] | 604 | struct audio_route *audio_route_init(unsigned int card, const char *xml_path) |
| 605 | { |
| 606 | struct config_parse_state state; |
| 607 | XML_Parser parser; |
| 608 | FILE *file; |
| 609 | int bytes_read; |
| 610 | void *buf; |
| 611 | int i; |
| 612 | struct audio_route *ar; |
| 613 | |
| 614 | ar = calloc(1, sizeof(struct audio_route)); |
| 615 | if (!ar) |
| 616 | goto err_calloc; |
| 617 | |
| 618 | ar->mixer = mixer_open(card); |
| 619 | if (!ar->mixer) { |
| 620 | ALOGE("Unable to open the mixer, aborting."); |
| 621 | goto err_mixer_open; |
| 622 | } |
| 623 | |
| 624 | ar->mixer_path = NULL; |
| 625 | ar->mixer_path_size = 0; |
| 626 | ar->num_mixer_paths = 0; |
| 627 | |
| 628 | /* allocate space for and read current mixer settings */ |
| 629 | if (alloc_mixer_state(ar) < 0) |
| 630 | goto err_mixer_state; |
| 631 | |
| 632 | /* use the default XML path if none is provided */ |
| 633 | if (xml_path == NULL) |
| 634 | xml_path = MIXER_XML_PATH; |
| 635 | |
| 636 | file = fopen(xml_path, "r"); |
| 637 | |
| 638 | if (!file) { |
| 639 | ALOGE("Failed to open %s", xml_path); |
| 640 | goto err_fopen; |
| 641 | } |
| 642 | |
| 643 | parser = XML_ParserCreate(NULL); |
| 644 | if (!parser) { |
| 645 | ALOGE("Failed to create XML parser"); |
| 646 | goto err_parser_create; |
| 647 | } |
| 648 | |
| 649 | memset(&state, 0, sizeof(state)); |
| 650 | state.ar = ar; |
| 651 | XML_SetUserData(parser, &state); |
| 652 | XML_SetElementHandler(parser, start_tag, end_tag); |
| 653 | |
| 654 | for (;;) { |
| 655 | buf = XML_GetBuffer(parser, BUF_SIZE); |
| 656 | if (buf == NULL) |
| 657 | goto err_parse; |
| 658 | |
| 659 | bytes_read = fread(buf, 1, BUF_SIZE, file); |
| 660 | if (bytes_read < 0) |
| 661 | goto err_parse; |
| 662 | |
| 663 | if (XML_ParseBuffer(parser, bytes_read, |
| 664 | bytes_read == 0) == XML_STATUS_ERROR) { |
| 665 | ALOGE("Error in mixer xml (%s)", MIXER_XML_PATH); |
| 666 | goto err_parse; |
| 667 | } |
| 668 | |
| 669 | if (bytes_read == 0) |
| 670 | break; |
| 671 | } |
| 672 | |
| 673 | /* apply the initial mixer values, and save them so we can reset the |
| 674 | mixer to the original values */ |
| 675 | audio_route_update_mixer(ar); |
| 676 | save_mixer_state(ar); |
| 677 | |
| 678 | XML_ParserFree(parser); |
| 679 | fclose(file); |
| 680 | return ar; |
| 681 | |
| 682 | err_parse: |
| 683 | XML_ParserFree(parser); |
| 684 | err_parser_create: |
| 685 | fclose(file); |
| 686 | err_fopen: |
| 687 | free_mixer_state(ar); |
| 688 | err_mixer_state: |
| 689 | mixer_close(ar->mixer); |
| 690 | err_mixer_open: |
| 691 | free(ar); |
| 692 | ar = NULL; |
| 693 | err_calloc: |
| 694 | return NULL; |
| 695 | } |
| 696 | |
| 697 | void audio_route_free(struct audio_route *ar) |
| 698 | { |
| 699 | free_mixer_state(ar); |
| 700 | mixer_close(ar->mixer); |
| 701 | free(ar); |
| 702 | } |