Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 1 | /* mixer.c |
| 2 | ** |
| 3 | ** Copyright 2011, The Android Open Source Project |
| 4 | ** |
| 5 | ** Redistribution and use in source and binary forms, with or without |
| 6 | ** modification, are permitted provided that the following conditions are met: |
| 7 | ** * Redistributions of source code must retain the above copyright |
| 8 | ** notice, this list of conditions and the following disclaimer. |
| 9 | ** * Redistributions in binary form must reproduce the above copyright |
| 10 | ** notice, this list of conditions and the following disclaimer in the |
| 11 | ** documentation and/or other materials provided with the distribution. |
| 12 | ** * Neither the name of The Android Open Source Project nor the names of |
| 13 | ** its contributors may be used to endorse or promote products derived |
| 14 | ** from this software without specific prior written permission. |
| 15 | ** |
| 16 | ** THIS SOFTWARE IS PROVIDED BY The Android Open Source Project ``AS IS'' AND |
| 17 | ** ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | ** IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 19 | ** ARE DISCLAIMED. IN NO EVENT SHALL The Android Open Source Project BE LIABLE |
| 20 | ** FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 21 | ** DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| 22 | ** SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| 23 | ** CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 24 | ** LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 25 | ** OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| 26 | ** DAMAGE. |
| 27 | */ |
| 28 | |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 29 | #include <stdbool.h> |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 30 | #include <stdio.h> |
| 31 | #include <stdlib.h> |
Ben Zhang | 6cb14f2 | 2016-04-22 17:59:40 -0700 | [diff] [blame] | 32 | #include <stdint.h> |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 33 | #include <string.h> |
| 34 | #include <unistd.h> |
| 35 | #include <fcntl.h> |
| 36 | #include <errno.h> |
| 37 | #include <ctype.h> |
Pankaj Bharadiya | 415c0c3 | 2017-01-11 08:57:06 +0530 | [diff] [blame] | 38 | #include <poll.h> |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 39 | |
Simon Wilson | 85dc38f | 2012-05-15 17:37:19 -0700 | [diff] [blame] | 40 | #include <sys/ioctl.h> |
| 41 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 42 | #include <linux/ioctl.h> |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 43 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 44 | #define __force |
| 45 | #define __bitwise |
| 46 | #define __user |
| 47 | #include <sound/asound.h> |
| 48 | |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 49 | #ifndef SNDRV_CTL_ELEM_ID_NAME_MAXLEN |
| 50 | #define SNDRV_CTL_ELEM_ID_NAME_MAXLEN 44 |
| 51 | #endif |
| 52 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 53 | #include <tinyalsa/asoundlib.h> |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 54 | #include "mixer_io.h" |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 55 | |
| 56 | struct mixer_ctl { |
| 57 | struct mixer *mixer; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 58 | struct mixer_ctl_group *grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 59 | struct snd_ctl_elem_info *info; |
| 60 | char **ename; |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 61 | bool info_retrieved; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 62 | }; |
| 63 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 64 | struct mixer_ctl_group { |
Simon Wilson | 7e8a656 | 2013-06-28 16:47:16 -0700 | [diff] [blame] | 65 | struct snd_ctl_elem_info *elem_info; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 66 | struct mixer_ctl *ctl; |
| 67 | unsigned int count; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 68 | int event_cnt; |
| 69 | |
| 70 | struct mixer_ops *ops; |
| 71 | void *data; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 72 | }; |
| 73 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 74 | struct mixer { |
| 75 | int fd; |
| 76 | struct snd_ctl_card_info card_info; |
| 77 | |
| 78 | /* hardware/physical mixer control group */ |
| 79 | struct mixer_ctl_group *hw_grp; |
| 80 | |
| 81 | /* |
| 82 | * Virutal mixer control group. |
| 83 | * Currently supports one virtual mixer (.so) |
| 84 | * per card. Could be extended to multiple |
| 85 | */ |
| 86 | struct mixer_ctl_group *virt_grp; |
| 87 | |
| 88 | unsigned int total_ctl_count; |
| 89 | }; |
| 90 | |
| 91 | static void mixer_grp_close(struct mixer_ctl_group *grp) |
| 92 | { |
| 93 | unsigned int n, m; |
| 94 | |
| 95 | if (!grp) |
| 96 | return; |
| 97 | |
| 98 | if (grp->ctl) { |
| 99 | for (n = 0; n < grp->count; n++) { |
| 100 | if (grp->ctl[n].ename) { |
| 101 | unsigned int max = grp->ctl[n].info->value.enumerated.items; |
| 102 | for (m = 0; m < max; m++) |
| 103 | free(grp->ctl[n].ename[m]); |
| 104 | free(grp->ctl[n].ename); |
| 105 | } |
| 106 | } |
| 107 | free(grp->ctl); |
| 108 | } |
| 109 | |
| 110 | if (grp->elem_info) |
| 111 | free(grp->elem_info); |
| 112 | |
| 113 | free(grp); |
| 114 | } |
| 115 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 116 | void mixer_close(struct mixer *mixer) |
| 117 | { |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 118 | if (!mixer) |
| 119 | return; |
| 120 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 121 | if (mixer->fd >= 0 && mixer->hw_grp) |
| 122 | mixer->hw_grp->ops->close(mixer->hw_grp->data); |
| 123 | mixer_grp_close(mixer->hw_grp); |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 124 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 125 | if (mixer->virt_grp) |
| 126 | mixer->virt_grp->ops->close(mixer->virt_grp->data); |
| 127 | mixer_grp_close(mixer->virt_grp); |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 128 | |
| 129 | free(mixer); |
| 130 | |
| 131 | /* TODO: verify frees */ |
| 132 | } |
| 133 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 134 | static int mixer_grp_open(struct mixer *mixer, |
| 135 | struct mixer_ctl_group **ctl_grp, |
| 136 | struct mixer_ops *ops, |
| 137 | void *data, int *num_ctls_in_grp) |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 138 | { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 139 | struct mixer_ctl_group *grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 140 | struct snd_ctl_elem_list elist; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 141 | struct snd_ctl_elem_id *eid = NULL; |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 142 | unsigned int n; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 143 | int ret; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 144 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 145 | grp = calloc(1, sizeof(*grp)); |
| 146 | if (!grp) |
| 147 | return -ENOMEM; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 148 | |
| 149 | memset(&elist, 0, sizeof(elist)); |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 150 | ret = ops->ioctl(data, SNDRV_CTL_IOCTL_ELEM_LIST, &elist); |
| 151 | if (ret < 0) |
| 152 | goto err_get_elem_list; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 153 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 154 | grp->ctl = calloc(elist.count, sizeof(struct mixer_ctl)); |
| 155 | grp->elem_info = calloc(elist.count, sizeof(struct snd_ctl_elem_info)); |
| 156 | if (!grp->ctl || !grp->elem_info) { |
| 157 | ret = -ENOMEM; |
| 158 | goto err_ctl_alloc; |
| 159 | } |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 160 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 161 | eid = calloc(elist.count, sizeof(*eid)); |
| 162 | if (!eid) { |
| 163 | ret = -ENOMEM; |
| 164 | goto err_ctl_alloc; |
| 165 | } |
Simon Wilson | 7e8a656 | 2013-06-28 16:47:16 -0700 | [diff] [blame] | 166 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 167 | grp->count = elist.count; |
| 168 | elist.space = grp->count; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 169 | elist.pids = eid; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 170 | ret = ops->ioctl(data, SNDRV_CTL_IOCTL_ELEM_LIST, &elist); |
| 171 | if (ret < 0) |
| 172 | goto err_ctl_alloc; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 173 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 174 | for (n = 0; n < grp->count; n++) { |
| 175 | struct mixer_ctl *ctl = grp->ctl + n; |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 176 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 177 | ctl->grp = grp; |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 178 | ctl->mixer = mixer; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 179 | ctl->info = grp->elem_info + n; |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 180 | ctl->info->id.numid = eid[n].numid; |
| 181 | strncpy((char *)ctl->info->id.name, (char *)eid[n].name, |
| 182 | SNDRV_CTL_ELEM_ID_NAME_MAXLEN); |
| 183 | ctl->info->id.name[SNDRV_CTL_ELEM_ID_NAME_MAXLEN - 1] = 0; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 184 | } |
| 185 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 186 | grp->data = data; |
| 187 | grp->ops = ops; |
| 188 | *ctl_grp = grp; |
| 189 | *num_ctls_in_grp = grp->count; |
| 190 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 191 | free(eid); |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 192 | return 0; |
| 193 | |
| 194 | err_ctl_alloc: |
| 195 | |
| 196 | if (eid) |
| 197 | free(eid); |
| 198 | |
| 199 | if (grp->elem_info) |
| 200 | free(grp->elem_info); |
| 201 | |
| 202 | if (grp->ctl) |
| 203 | free(grp->ctl); |
| 204 | |
| 205 | err_get_elem_list: |
| 206 | |
| 207 | free(grp); |
| 208 | return ret; |
| 209 | |
| 210 | } |
| 211 | |
| 212 | static int mixer_do_hw_open(struct mixer *mixer, unsigned int card) |
| 213 | { |
| 214 | struct mixer_ops *ops; |
| 215 | void *data; |
| 216 | int fd, ret, num_grp_ctls = 0; |
| 217 | |
| 218 | mixer->fd = -1; |
| 219 | fd = mixer_hw_open(card, &data, &ops); |
| 220 | if (fd < 0) |
| 221 | return fd; |
| 222 | |
| 223 | ret = ops->ioctl(data, SNDRV_CTL_IOCTL_CARD_INFO, &mixer->card_info); |
| 224 | if (ret < 0) |
| 225 | goto err_card_info; |
| 226 | |
| 227 | ret = mixer_grp_open(mixer, &mixer->hw_grp, ops, data, &num_grp_ctls); |
| 228 | if (ret < 0) |
| 229 | goto err_card_info; |
| 230 | |
| 231 | mixer->total_ctl_count += num_grp_ctls; |
| 232 | |
| 233 | mixer->fd = fd; |
| 234 | return 0; |
| 235 | |
| 236 | err_card_info: |
| 237 | ops->close(data); |
| 238 | return ret; |
| 239 | |
| 240 | } |
| 241 | |
| 242 | static int mixer_do_plugin_open(struct mixer *mixer, unsigned int card, |
| 243 | int is_hw_open_failed) |
| 244 | { |
| 245 | struct mixer_ops *ops; |
| 246 | void *data; |
| 247 | int ret, num_grp_ctls = 0; |
| 248 | |
| 249 | ret = mixer_plugin_open(card, &data, &ops); |
| 250 | if (ret < 0) |
| 251 | return ret; |
| 252 | |
| 253 | /* Get card_info if hw_open failed */ |
| 254 | if (is_hw_open_failed) { |
| 255 | ret = ops->ioctl(data, SNDRV_CTL_IOCTL_CARD_INFO, &mixer->card_info); |
| 256 | if (ret < 0) |
| 257 | goto err_card_info; |
| 258 | } |
| 259 | |
| 260 | ret = mixer_grp_open(mixer, &mixer->virt_grp, ops, data, &num_grp_ctls); |
| 261 | if (ret < 0) |
| 262 | goto err_card_info; |
| 263 | |
| 264 | mixer->total_ctl_count += num_grp_ctls; |
| 265 | return 0; |
| 266 | |
| 267 | err_card_info: |
| 268 | ops->close(data); |
| 269 | return ret; |
| 270 | |
| 271 | } |
| 272 | |
| 273 | struct mixer *mixer_open(unsigned int card) |
| 274 | { |
| 275 | struct mixer *mixer = NULL; |
| 276 | int h_status, v_status; |
| 277 | |
| 278 | mixer = calloc(1, sizeof(*mixer)); |
| 279 | if (!mixer) |
| 280 | goto fail; |
| 281 | |
| 282 | /* open hardware node first */ |
| 283 | h_status = mixer_do_hw_open(mixer, card); |
| 284 | |
| 285 | /* |
| 286 | * open the virtual node even if hw_open fails |
| 287 | * since hw_open is expected to fail for virtual cards |
| 288 | * for which kernel does not register mixer node |
| 289 | */ |
| 290 | //TODO: open virtual node only if mixer is defined under snd-card-def |
| 291 | v_status = mixer_do_plugin_open(mixer, card, h_status); |
| 292 | |
| 293 | /* Fail mixer_open if both hw and plugin nodes cannot be opened */ |
| 294 | if (h_status < 0 && v_status < 0) |
| 295 | goto fail; |
| 296 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 297 | return mixer; |
| 298 | |
| 299 | fail: |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 300 | if (mixer) |
| 301 | mixer_close(mixer); |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 302 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 303 | return 0; |
| 304 | } |
| 305 | |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 306 | static bool mixer_ctl_get_elem_info(struct mixer_ctl* ctl) |
| 307 | { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 308 | struct mixer_ctl_group *grp = ctl->grp; |
| 309 | unsigned int i; |
| 310 | |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 311 | if (!ctl->info_retrieved) { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 312 | if (grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_INFO, |
| 313 | ctl->info) < 0) |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 314 | return false; |
| 315 | ctl->info_retrieved = true; |
| 316 | } |
| 317 | |
| 318 | if (ctl->info->type != SNDRV_CTL_ELEM_TYPE_ENUMERATED || ctl->ename) |
| 319 | return true; |
| 320 | |
| 321 | struct snd_ctl_elem_info tmp; |
| 322 | char** enames = calloc(ctl->info->value.enumerated.items, sizeof(char*)); |
| 323 | if (!enames) |
| 324 | return false; |
| 325 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 326 | for (i = 0; i < ctl->info->value.enumerated.items; i++) { |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 327 | memset(&tmp, 0, sizeof(tmp)); |
| 328 | tmp.id.numid = ctl->info->id.numid; |
| 329 | tmp.value.enumerated.item = i; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 330 | if (grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_INFO, &tmp) < 0) |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 331 | goto fail; |
| 332 | enames[i] = strdup(tmp.value.enumerated.name); |
| 333 | if (!enames[i]) |
| 334 | goto fail; |
| 335 | } |
| 336 | ctl->ename = enames; |
| 337 | return true; |
| 338 | |
| 339 | fail: |
| 340 | free(enames); |
| 341 | return false; |
| 342 | } |
| 343 | |
Simon Wilson | 7e8a656 | 2013-06-28 16:47:16 -0700 | [diff] [blame] | 344 | const char *mixer_get_name(struct mixer *mixer) |
| 345 | { |
| 346 | return (const char *)mixer->card_info.name; |
| 347 | } |
| 348 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 349 | unsigned int mixer_get_num_ctls(struct mixer *mixer) |
| 350 | { |
| 351 | if (!mixer) |
| 352 | return 0; |
| 353 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 354 | return mixer->total_ctl_count; |
| 355 | } |
| 356 | |
| 357 | static int mixer_grp_get_count(struct mixer_ctl_group *grp) |
| 358 | { |
| 359 | if (!grp) |
| 360 | return 0; |
| 361 | |
| 362 | return grp->count; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 363 | } |
| 364 | |
| 365 | struct mixer_ctl *mixer_get_ctl(struct mixer *mixer, unsigned int id) |
| 366 | { |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 367 | struct mixer_ctl *ctl; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 368 | unsigned int hw_ctl_count, virt_ctl_count; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 369 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 370 | if (!mixer || (id >= mixer->total_ctl_count)) |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 371 | return NULL; |
| 372 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 373 | hw_ctl_count = mixer_grp_get_count(mixer->hw_grp); |
| 374 | virt_ctl_count = mixer_grp_get_count(mixer->virt_grp); |
| 375 | |
| 376 | if (id < hw_ctl_count) |
| 377 | ctl = mixer->hw_grp->ctl + id; |
| 378 | else if ((id - hw_ctl_count) < virt_ctl_count) |
| 379 | ctl = mixer->virt_grp->ctl + (id - hw_ctl_count); |
| 380 | else |
| 381 | return NULL; |
| 382 | |
John Muir | 22bca93 | 2017-10-23 10:58:12 -0700 | [diff] [blame] | 383 | if (!mixer_ctl_get_elem_info(ctl)) |
| 384 | return NULL; |
| 385 | |
| 386 | return ctl; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 387 | } |
| 388 | |
| 389 | struct mixer_ctl *mixer_get_ctl_by_name(struct mixer *mixer, const char *name) |
| 390 | { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 391 | struct mixer_ctl_group *grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 392 | unsigned int n; |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 393 | int hw_ctl_count; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 394 | |
| 395 | if (!mixer) |
| 396 | return NULL; |
| 397 | |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 398 | hw_ctl_count = mixer_grp_get_count(mixer->hw_grp); |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 399 | if (mixer->hw_grp) { |
| 400 | grp = mixer->hw_grp; |
| 401 | |
| 402 | for (n = 0; n < grp->count; n++) |
| 403 | if (!strcmp(name, (char*) grp->elem_info[n].id.name)) |
Andrew Chant | b570106 | 2018-02-05 15:16:41 -0800 | [diff] [blame] | 404 | return mixer_get_ctl(mixer, n); |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 405 | } |
| 406 | |
| 407 | if (mixer->virt_grp) { |
| 408 | grp = mixer->virt_grp; |
| 409 | |
| 410 | for (n = 0; n < grp->count; n++) |
| 411 | if (!strcmp(name, (char*) grp->elem_info[n].id.name)) |
| 412 | return mixer_get_ctl(mixer, n + hw_ctl_count); |
| 413 | } |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 414 | |
Andrew Chant | b570106 | 2018-02-05 15:16:41 -0800 | [diff] [blame] | 415 | return NULL; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 416 | } |
| 417 | |
Simon Wilson | 7e8a656 | 2013-06-28 16:47:16 -0700 | [diff] [blame] | 418 | void mixer_ctl_update(struct mixer_ctl *ctl) |
| 419 | { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 420 | struct mixer_ctl_group *grp = ctl->grp; |
| 421 | |
| 422 | grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_INFO, ctl->info); |
Simon Wilson | 7e8a656 | 2013-06-28 16:47:16 -0700 | [diff] [blame] | 423 | } |
| 424 | |
Simon Wilson | e44e30a | 2012-03-08 10:45:31 -0800 | [diff] [blame] | 425 | const char *mixer_ctl_get_name(struct mixer_ctl *ctl) |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 426 | { |
Simon Wilson | e44e30a | 2012-03-08 10:45:31 -0800 | [diff] [blame] | 427 | if (!ctl) |
| 428 | return NULL; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 429 | |
Simon Wilson | e44e30a | 2012-03-08 10:45:31 -0800 | [diff] [blame] | 430 | return (const char *)ctl->info->id.name; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 431 | } |
| 432 | |
| 433 | enum mixer_ctl_type mixer_ctl_get_type(struct mixer_ctl *ctl) |
| 434 | { |
| 435 | if (!ctl) |
| 436 | return MIXER_CTL_TYPE_UNKNOWN; |
| 437 | |
| 438 | switch (ctl->info->type) { |
| 439 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: return MIXER_CTL_TYPE_BOOL; |
| 440 | case SNDRV_CTL_ELEM_TYPE_INTEGER: return MIXER_CTL_TYPE_INT; |
| 441 | case SNDRV_CTL_ELEM_TYPE_ENUMERATED: return MIXER_CTL_TYPE_ENUM; |
| 442 | case SNDRV_CTL_ELEM_TYPE_BYTES: return MIXER_CTL_TYPE_BYTE; |
| 443 | case SNDRV_CTL_ELEM_TYPE_IEC958: return MIXER_CTL_TYPE_IEC958; |
| 444 | case SNDRV_CTL_ELEM_TYPE_INTEGER64: return MIXER_CTL_TYPE_INT64; |
| 445 | default: return MIXER_CTL_TYPE_UNKNOWN; |
| 446 | }; |
| 447 | } |
| 448 | |
| 449 | const char *mixer_ctl_get_type_string(struct mixer_ctl *ctl) |
| 450 | { |
| 451 | if (!ctl) |
| 452 | return ""; |
| 453 | |
| 454 | switch (ctl->info->type) { |
| 455 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: return "BOOL"; |
| 456 | case SNDRV_CTL_ELEM_TYPE_INTEGER: return "INT"; |
| 457 | case SNDRV_CTL_ELEM_TYPE_ENUMERATED: return "ENUM"; |
| 458 | case SNDRV_CTL_ELEM_TYPE_BYTES: return "BYTE"; |
| 459 | case SNDRV_CTL_ELEM_TYPE_IEC958: return "IEC958"; |
| 460 | case SNDRV_CTL_ELEM_TYPE_INTEGER64: return "INT64"; |
| 461 | default: return "Unknown"; |
| 462 | }; |
| 463 | } |
| 464 | |
| 465 | unsigned int mixer_ctl_get_num_values(struct mixer_ctl *ctl) |
| 466 | { |
| 467 | if (!ctl) |
| 468 | return 0; |
| 469 | |
| 470 | return ctl->info->count; |
| 471 | } |
| 472 | |
| 473 | static int percent_to_int(struct snd_ctl_elem_info *ei, int percent) |
| 474 | { |
| 475 | int range; |
| 476 | |
| 477 | if (percent > 100) |
| 478 | percent = 100; |
| 479 | else if (percent < 0) |
| 480 | percent = 0; |
| 481 | |
| 482 | range = (ei->value.integer.max - ei->value.integer.min); |
| 483 | |
| 484 | return ei->value.integer.min + (range * percent) / 100; |
| 485 | } |
| 486 | |
| 487 | static int int_to_percent(struct snd_ctl_elem_info *ei, int value) |
| 488 | { |
| 489 | int range = (ei->value.integer.max - ei->value.integer.min); |
| 490 | |
| 491 | if (range == 0) |
| 492 | return 0; |
| 493 | |
| 494 | return ((value - ei->value.integer.min) / range) * 100; |
| 495 | } |
| 496 | |
| 497 | int mixer_ctl_get_percent(struct mixer_ctl *ctl, unsigned int id) |
| 498 | { |
| 499 | if (!ctl || (ctl->info->type != SNDRV_CTL_ELEM_TYPE_INTEGER)) |
| 500 | return -EINVAL; |
| 501 | |
| 502 | return int_to_percent(ctl->info, mixer_ctl_get_value(ctl, id)); |
| 503 | } |
| 504 | |
| 505 | int mixer_ctl_set_percent(struct mixer_ctl *ctl, unsigned int id, int percent) |
| 506 | { |
| 507 | if (!ctl || (ctl->info->type != SNDRV_CTL_ELEM_TYPE_INTEGER)) |
| 508 | return -EINVAL; |
| 509 | |
| 510 | return mixer_ctl_set_value(ctl, id, percent_to_int(ctl->info, percent)); |
| 511 | } |
| 512 | |
| 513 | int mixer_ctl_get_value(struct mixer_ctl *ctl, unsigned int id) |
| 514 | { |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 515 | struct mixer_ctl_group *grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 516 | struct snd_ctl_elem_value ev; |
| 517 | int ret; |
| 518 | |
| 519 | if (!ctl || (id >= ctl->info->count)) |
| 520 | return -EINVAL; |
| 521 | |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 522 | grp = ctl->grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 523 | memset(&ev, 0, sizeof(ev)); |
| 524 | ev.id.numid = ctl->info->id.numid; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 525 | ret = grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_READ, &ev); |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 526 | if (ret < 0) |
| 527 | return ret; |
| 528 | |
| 529 | switch (ctl->info->type) { |
| 530 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: |
| 531 | return !!ev.value.integer.value[id]; |
| 532 | |
| 533 | case SNDRV_CTL_ELEM_TYPE_INTEGER: |
| 534 | return ev.value.integer.value[id]; |
| 535 | |
| 536 | case SNDRV_CTL_ELEM_TYPE_ENUMERATED: |
| 537 | return ev.value.enumerated.item[id]; |
| 538 | |
Simon Wilson | 5aed71d | 2011-11-16 14:45:38 -0800 | [diff] [blame] | 539 | case SNDRV_CTL_ELEM_TYPE_BYTES: |
| 540 | return ev.value.bytes.data[id]; |
| 541 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 542 | default: |
| 543 | return -EINVAL; |
| 544 | } |
| 545 | |
| 546 | return 0; |
| 547 | } |
| 548 | |
Pankaj Bharadiya | 10d4b8f | 2017-01-04 11:10:58 +0530 | [diff] [blame] | 549 | int mixer_ctl_is_access_tlv_rw(struct mixer_ctl *ctl) |
| 550 | { |
| 551 | return (ctl->info->access & SNDRV_CTL_ELEM_ACCESS_TLV_READWRITE); |
| 552 | } |
| 553 | |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 554 | int mixer_ctl_get_array(struct mixer_ctl *ctl, void *array, size_t count) |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 555 | { |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 556 | struct mixer_ctl_group *grp; |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 557 | struct snd_ctl_elem_value ev; |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 558 | int ret = 0; |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 559 | size_t size; |
| 560 | void *source; |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 561 | size_t total_count; |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 562 | |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 563 | if ((!ctl) || !count || !array) |
| 564 | return -EINVAL; |
| 565 | |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 566 | grp = ctl->grp; |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 567 | total_count = ctl->info->count; |
| 568 | |
| 569 | if ((ctl->info->type == SNDRV_CTL_ELEM_TYPE_BYTES) && |
Pankaj Bharadiya | 10d4b8f | 2017-01-04 11:10:58 +0530 | [diff] [blame] | 570 | mixer_ctl_is_access_tlv_rw(ctl)) { |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 571 | /* Additional two words is for the TLV header */ |
| 572 | total_count += TLV_HEADER_SIZE; |
| 573 | } |
| 574 | |
| 575 | if (count > total_count) |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 576 | return -EINVAL; |
| 577 | |
| 578 | memset(&ev, 0, sizeof(ev)); |
| 579 | ev.id.numid = ctl->info->id.numid; |
| 580 | |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 581 | switch (ctl->info->type) { |
| 582 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: |
| 583 | case SNDRV_CTL_ELEM_TYPE_INTEGER: |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 584 | ret = grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_READ, &ev); |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 585 | if (ret < 0) |
| 586 | return ret; |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 587 | size = sizeof(ev.value.integer.value[0]); |
| 588 | source = ev.value.integer.value; |
| 589 | break; |
| 590 | |
| 591 | case SNDRV_CTL_ELEM_TYPE_BYTES: |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 592 | /* check if this is new bytes TLV */ |
Pankaj Bharadiya | 10d4b8f | 2017-01-04 11:10:58 +0530 | [diff] [blame] | 593 | if (mixer_ctl_is_access_tlv_rw(ctl)) { |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 594 | struct snd_ctl_tlv *tlv; |
| 595 | int ret; |
| 596 | |
Ben Zhang | 6cb14f2 | 2016-04-22 17:59:40 -0700 | [diff] [blame] | 597 | if (count > SIZE_MAX - sizeof(*tlv)) |
| 598 | return -EINVAL; |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 599 | tlv = calloc(1, sizeof(*tlv) + count); |
Ben Zhang | 6cb14f2 | 2016-04-22 17:59:40 -0700 | [diff] [blame] | 600 | if (!tlv) |
| 601 | return -ENOMEM; |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 602 | tlv->numid = ctl->info->id.numid; |
| 603 | tlv->length = count; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 604 | ret = grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_TLV_READ, tlv); |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 605 | |
| 606 | source = tlv->tlv; |
| 607 | memcpy(array, source, count); |
| 608 | |
| 609 | free(tlv); |
| 610 | |
| 611 | return ret; |
| 612 | } else { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 613 | ret = grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_READ, &ev); |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 614 | if (ret < 0) |
| 615 | return ret; |
| 616 | size = sizeof(ev.value.bytes.data[0]); |
| 617 | source = ev.value.bytes.data; |
| 618 | break; |
| 619 | } |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 620 | |
Yogesh Agrawal | 49a6137 | 2013-08-02 20:04:58 +0530 | [diff] [blame] | 621 | case SNDRV_CTL_ELEM_TYPE_IEC958: |
| 622 | size = sizeof(ev.value.iec958); |
| 623 | source = &ev.value.iec958; |
| 624 | break; |
| 625 | |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 626 | default: |
| 627 | return -EINVAL; |
| 628 | } |
| 629 | |
| 630 | memcpy(array, source, size * count); |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 631 | |
| 632 | return 0; |
| 633 | } |
| 634 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 635 | int mixer_ctl_set_value(struct mixer_ctl *ctl, unsigned int id, int value) |
| 636 | { |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 637 | struct mixer_ctl_group *grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 638 | struct snd_ctl_elem_value ev; |
| 639 | int ret; |
| 640 | |
| 641 | if (!ctl || (id >= ctl->info->count)) |
| 642 | return -EINVAL; |
| 643 | |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 644 | grp = ctl->grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 645 | memset(&ev, 0, sizeof(ev)); |
| 646 | ev.id.numid = ctl->info->id.numid; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 647 | ret = grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_READ, &ev); |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 648 | if (ret < 0) |
| 649 | return ret; |
| 650 | |
| 651 | switch (ctl->info->type) { |
| 652 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: |
| 653 | ev.value.integer.value[id] = !!value; |
| 654 | break; |
| 655 | |
| 656 | case SNDRV_CTL_ELEM_TYPE_INTEGER: |
| 657 | ev.value.integer.value[id] = value; |
| 658 | break; |
| 659 | |
| 660 | case SNDRV_CTL_ELEM_TYPE_ENUMERATED: |
| 661 | ev.value.enumerated.item[id] = value; |
| 662 | break; |
| 663 | |
David.Coutherut | a8481aa | 2013-06-11 16:22:57 +0200 | [diff] [blame] | 664 | case SNDRV_CTL_ELEM_TYPE_BYTES: |
| 665 | ev.value.bytes.data[id] = value; |
| 666 | break; |
| 667 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 668 | default: |
| 669 | return -EINVAL; |
| 670 | } |
| 671 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 672 | return grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_WRITE, &ev); |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 673 | } |
| 674 | |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 675 | int mixer_ctl_set_array(struct mixer_ctl *ctl, const void *array, size_t count) |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 676 | { |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 677 | struct mixer_ctl_group *grp; |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 678 | struct snd_ctl_elem_value ev; |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 679 | size_t size; |
| 680 | void *dest; |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 681 | size_t total_count; |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 682 | |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 683 | if ((!ctl) || !count || !array) |
| 684 | return -EINVAL; |
| 685 | |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 686 | grp = ctl->grp; |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 687 | total_count = ctl->info->count; |
| 688 | |
| 689 | if ((ctl->info->type == SNDRV_CTL_ELEM_TYPE_BYTES) && |
Pankaj Bharadiya | 10d4b8f | 2017-01-04 11:10:58 +0530 | [diff] [blame] | 690 | mixer_ctl_is_access_tlv_rw(ctl)) { |
Pawse, GuruprasadX | b4e8d0d | 2016-02-02 17:52:29 +0530 | [diff] [blame] | 691 | /* Additional two words is for the TLV header */ |
| 692 | total_count += TLV_HEADER_SIZE; |
| 693 | } |
| 694 | |
| 695 | if (count > total_count) |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 696 | return -EINVAL; |
| 697 | |
| 698 | memset(&ev, 0, sizeof(ev)); |
| 699 | ev.id.numid = ctl->info->id.numid; |
| 700 | |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 701 | switch (ctl->info->type) { |
| 702 | case SNDRV_CTL_ELEM_TYPE_BOOLEAN: |
| 703 | case SNDRV_CTL_ELEM_TYPE_INTEGER: |
| 704 | size = sizeof(ev.value.integer.value[0]); |
| 705 | dest = ev.value.integer.value; |
| 706 | break; |
| 707 | |
| 708 | case SNDRV_CTL_ELEM_TYPE_BYTES: |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 709 | /* check if this is new bytes TLV */ |
Pankaj Bharadiya | 10d4b8f | 2017-01-04 11:10:58 +0530 | [diff] [blame] | 710 | if (mixer_ctl_is_access_tlv_rw(ctl)) { |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 711 | struct snd_ctl_tlv *tlv; |
| 712 | int ret = 0; |
Ben Zhang | 6cb14f2 | 2016-04-22 17:59:40 -0700 | [diff] [blame] | 713 | if (count > SIZE_MAX - sizeof(*tlv)) |
| 714 | return -EINVAL; |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 715 | tlv = calloc(1, sizeof(*tlv) + count); |
Ben Zhang | 6cb14f2 | 2016-04-22 17:59:40 -0700 | [diff] [blame] | 716 | if (!tlv) |
| 717 | return -ENOMEM; |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 718 | tlv->numid = ctl->info->id.numid; |
| 719 | tlv->length = count; |
| 720 | memcpy(tlv->tlv, array, count); |
| 721 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 722 | ret = grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_TLV_WRITE, tlv); |
Mythri P K | 67b1df4 | 2014-08-18 15:39:36 +0530 | [diff] [blame] | 723 | free(tlv); |
| 724 | |
| 725 | return ret; |
| 726 | } else { |
| 727 | size = sizeof(ev.value.bytes.data[0]); |
| 728 | dest = ev.value.bytes.data; |
| 729 | } |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 730 | break; |
| 731 | |
Yogesh Agrawal | 49a6137 | 2013-08-02 20:04:58 +0530 | [diff] [blame] | 732 | case SNDRV_CTL_ELEM_TYPE_IEC958: |
| 733 | size = sizeof(ev.value.iec958); |
| 734 | dest = &ev.value.iec958; |
| 735 | break; |
| 736 | |
Simon Wilson | 8813fe8 | 2013-06-24 15:40:34 -0700 | [diff] [blame] | 737 | default: |
| 738 | return -EINVAL; |
| 739 | } |
| 740 | |
| 741 | memcpy(dest, array, size * count); |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 742 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 743 | return grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_WRITE, &ev); |
Simon Wilson | da39e0b | 2012-11-09 15:16:47 -0800 | [diff] [blame] | 744 | } |
| 745 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 746 | int mixer_ctl_get_range_min(struct mixer_ctl *ctl) |
| 747 | { |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 748 | if (!ctl || (ctl->info->type != SNDRV_CTL_ELEM_TYPE_INTEGER)) |
| 749 | return -EINVAL; |
| 750 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 751 | return ctl->info->value.integer.min; |
| 752 | } |
| 753 | |
| 754 | int mixer_ctl_get_range_max(struct mixer_ctl *ctl) |
| 755 | { |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 756 | if (!ctl || (ctl->info->type != SNDRV_CTL_ELEM_TYPE_INTEGER)) |
| 757 | return -EINVAL; |
| 758 | |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 759 | return ctl->info->value.integer.max; |
| 760 | } |
| 761 | |
| 762 | unsigned int mixer_ctl_get_num_enums(struct mixer_ctl *ctl) |
| 763 | { |
| 764 | if (!ctl) |
| 765 | return 0; |
| 766 | |
| 767 | return ctl->info->value.enumerated.items; |
| 768 | } |
| 769 | |
Simon Wilson | e44e30a | 2012-03-08 10:45:31 -0800 | [diff] [blame] | 770 | const char *mixer_ctl_get_enum_string(struct mixer_ctl *ctl, |
| 771 | unsigned int enum_id) |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 772 | { |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 773 | if (!ctl || (ctl->info->type != SNDRV_CTL_ELEM_TYPE_ENUMERATED) || |
| 774 | (enum_id >= ctl->info->value.enumerated.items)) |
Simon Wilson | e44e30a | 2012-03-08 10:45:31 -0800 | [diff] [blame] | 775 | return NULL; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 776 | |
Simon Wilson | e44e30a | 2012-03-08 10:45:31 -0800 | [diff] [blame] | 777 | return (const char *)ctl->ename[enum_id]; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 778 | } |
| 779 | |
| 780 | int mixer_ctl_set_enum_by_string(struct mixer_ctl *ctl, const char *string) |
| 781 | { |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 782 | struct mixer_ctl_group *grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 783 | unsigned int i, num_enums; |
| 784 | struct snd_ctl_elem_value ev; |
| 785 | int ret; |
| 786 | |
| 787 | if (!ctl || (ctl->info->type != SNDRV_CTL_ELEM_TYPE_ENUMERATED)) |
| 788 | return -EINVAL; |
| 789 | |
Akhil Karuturi | 42805c3 | 2020-01-17 13:53:14 -0800 | [diff] [blame^] | 790 | grp = ctl->grp; |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 791 | num_enums = ctl->info->value.enumerated.items; |
| 792 | for (i = 0; i < num_enums; i++) { |
| 793 | if (!strcmp(string, ctl->ename[i])) { |
| 794 | memset(&ev, 0, sizeof(ev)); |
| 795 | ev.value.enumerated.item[0] = i; |
| 796 | ev.id.numid = ctl->info->id.numid; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 797 | ret = grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_ELEM_WRITE, &ev); |
Simon Wilson | edff708 | 2011-06-06 15:33:34 -0700 | [diff] [blame] | 798 | if (ret < 0) |
| 799 | return ret; |
| 800 | return 0; |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | return -EINVAL; |
| 805 | } |
| 806 | |
Pankaj Bharadiya | 415c0c3 | 2017-01-11 08:57:06 +0530 | [diff] [blame] | 807 | /** Subscribes for the mixer events. |
| 808 | * @param mixer A mixer handle. |
| 809 | * @param subscribe value indicating subscribe or unsubscribe for events |
| 810 | * @returns On success, zero. |
| 811 | * On failure, non-zero. |
| 812 | * @ingroup libtinyalsa-mixer |
| 813 | */ |
| 814 | int mixer_subscribe_events(struct mixer *mixer, int subscribe) |
| 815 | { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 816 | struct mixer_ctl_group *grp; |
| 817 | |
| 818 | if (mixer->hw_grp) { |
| 819 | grp = mixer->hw_grp; |
| 820 | if (!subscribe) |
| 821 | grp->event_cnt = 0; |
| 822 | |
| 823 | if (grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS, |
| 824 | &subscribe) < 0) |
| 825 | return -1; |
| 826 | } |
| 827 | |
| 828 | if (mixer->virt_grp) { |
| 829 | grp = mixer->virt_grp; |
| 830 | if (!subscribe) |
| 831 | grp->event_cnt = 0; |
| 832 | |
| 833 | if (grp->ops->ioctl(grp->data, SNDRV_CTL_IOCTL_SUBSCRIBE_EVENTS, |
| 834 | &subscribe) < 0) |
| 835 | return -1; |
Pankaj Bharadiya | 415c0c3 | 2017-01-11 08:57:06 +0530 | [diff] [blame] | 836 | } |
| 837 | return 0; |
| 838 | } |
| 839 | |
| 840 | /** Wait for mixer events. |
| 841 | * @param mixer A mixer handle. |
| 842 | * @param timeout timout value |
| 843 | * @returns On success, 1. |
| 844 | * On failure, -errno. |
| 845 | * On timeout, 0 |
| 846 | * @ingroup libtinyalsa-mixer |
| 847 | */ |
| 848 | int mixer_wait_event(struct mixer *mixer, int timeout) |
| 849 | { |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 850 | struct pollfd *pfd; |
| 851 | struct mixer_ctl_group *grp; |
| 852 | int count = 0, num_fds = 0, i; |
Pankaj Bharadiya | 415c0c3 | 2017-01-11 08:57:06 +0530 | [diff] [blame] | 853 | |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 854 | if (mixer->fd >= 0) |
| 855 | num_fds++; |
| 856 | |
| 857 | if (mixer->virt_grp) |
| 858 | num_fds++; |
| 859 | |
| 860 | pfd = (struct pollfd *)calloc(sizeof(struct pollfd), num_fds); |
| 861 | if (!pfd) |
| 862 | return -ENOMEM; |
| 863 | |
| 864 | /* TODO wait events for virt fd */ |
| 865 | if (mixer->fd >= 0) { |
| 866 | pfd[count].fd = mixer->fd; |
| 867 | pfd[count].events = POLLIN | POLLOUT | POLLERR | POLLNVAL; |
| 868 | count++; |
| 869 | } |
| 870 | |
| 871 | if (mixer->virt_grp) { |
| 872 | grp = mixer->virt_grp; |
| 873 | if (!grp->ops->get_poll_fd(grp->data, pfd, count)) { |
| 874 | pfd[count].events = POLLIN | POLLERR | POLLNVAL; |
| 875 | count++; |
| 876 | } |
| 877 | } |
| 878 | |
| 879 | if (!count) |
| 880 | return 0; |
Pankaj Bharadiya | 415c0c3 | 2017-01-11 08:57:06 +0530 | [diff] [blame] | 881 | |
| 882 | for (;;) { |
| 883 | int err; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 884 | err = poll(pfd, count, timeout); |
Pankaj Bharadiya | 415c0c3 | 2017-01-11 08:57:06 +0530 | [diff] [blame] | 885 | if (err < 0) |
| 886 | return -errno; |
| 887 | if (!err) |
| 888 | return 0; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 889 | for (i = 0; i < count; i++) { |
| 890 | if (pfd[i].revents & (POLLERR | POLLNVAL)) |
| 891 | return -EIO; |
| 892 | if (pfd[i].revents & (POLLIN | POLLOUT)) { |
| 893 | if ((i == 0) && mixer->fd >= 0) { |
| 894 | grp = mixer->hw_grp; |
| 895 | grp->event_cnt++; |
| 896 | } else { |
| 897 | grp = mixer->virt_grp; |
| 898 | grp->event_cnt++; |
| 899 | } |
| 900 | return 1; |
| 901 | } |
| 902 | } |
Pankaj Bharadiya | 415c0c3 | 2017-01-11 08:57:06 +0530 | [diff] [blame] | 903 | } |
| 904 | } |
Andrew Chant | b570106 | 2018-02-05 15:16:41 -0800 | [diff] [blame] | 905 | |
| 906 | /** Consume a mixer event. |
| 907 | * If mixer_subscribe_events has been called, |
| 908 | * mixer_wait_event will identify when a control value has changed. |
| 909 | * This function will clear a single event from the mixer so that |
| 910 | * further events can be alerted. |
| 911 | * |
| 912 | * @param mixer A mixer handle. |
| 913 | * @returns 0 on success. -errno on failure. |
| 914 | * @ingroup libtinyalsa-mixer |
| 915 | */ |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 916 | int mixer_consume_event(struct mixer *mixer) |
| 917 | { |
Andrew Chant | b570106 | 2018-02-05 15:16:41 -0800 | [diff] [blame] | 918 | struct snd_ctl_event ev; |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 919 | struct mixer_ctl_group *grp; |
| 920 | ssize_t count = 0; |
| 921 | |
Andrew Chant | b570106 | 2018-02-05 15:16:41 -0800 | [diff] [blame] | 922 | // Exporting the actual event would require exposing snd_ctl_event |
| 923 | // via the header file, and all associated structs. |
| 924 | // The events generally tell you exactly which value changed, |
| 925 | // but reading values you're interested isn't hard and simplifies |
| 926 | // the interface greatly. |
Bhalchandra Gajare | 4268f1b | 2019-08-21 15:09:43 -0700 | [diff] [blame] | 927 | if (mixer->hw_grp) { |
| 928 | grp = mixer->hw_grp; |
| 929 | if (grp->event_cnt) { |
| 930 | grp->event_cnt--; |
| 931 | count = grp->ops->read_event(grp->data, &ev, sizeof(ev)); |
| 932 | return (count >= 0) ? 0 : -errno; |
| 933 | } |
| 934 | } |
| 935 | |
| 936 | if (mixer->virt_grp) { |
| 937 | grp = mixer->virt_grp; |
| 938 | if (grp->event_cnt) { |
| 939 | grp->event_cnt--; |
| 940 | count += grp->ops->read_event(grp->data, &ev, sizeof(ev)); |
| 941 | return (count >= 0) ? 0 : -errno; |
| 942 | } |
| 943 | } |
| 944 | return (count >= 0) ? 0 : -errno; |
| 945 | } |
| 946 | |
| 947 | /** Read a mixer event. |
| 948 | * If mixer_subscribe_events has been called, |
| 949 | * mixer_wait_event will identify when a control value has changed. |
| 950 | * This function will read and clear a single event from the mixer |
| 951 | * so that further events can be alerted. |
| 952 | * |
| 953 | * @param mixer A mixer handle. |
| 954 | * @param ev snd_ctl_event pointer where event needs to be read |
| 955 | * @returns 0 on success. -errno on failure. |
| 956 | * @ingroup libtinyalsa-mixer |
| 957 | */ |
| 958 | int mixer_read_event(struct mixer *mixer, struct snd_ctl_event *ev) |
| 959 | { |
| 960 | struct mixer_ctl_group *grp; |
| 961 | ssize_t count = 0; |
| 962 | |
| 963 | if (mixer->hw_grp) { |
| 964 | grp = mixer->hw_grp; |
| 965 | if (grp->event_cnt) { |
| 966 | grp->event_cnt--; |
| 967 | count = grp->ops->read_event(grp->data, ev, sizeof(*ev)); |
| 968 | return (count >= 0) ? 0 : -errno; |
| 969 | } |
| 970 | } |
| 971 | |
| 972 | if (mixer->virt_grp) { |
| 973 | grp = mixer->virt_grp; |
| 974 | if (grp->event_cnt) { |
| 975 | grp->event_cnt--; |
| 976 | count = grp->ops->read_event(grp->data, ev, sizeof(*ev)); |
| 977 | return (count >= 0) ? 0 : -errno; |
| 978 | } |
| 979 | } |
Andrew Chant | b570106 | 2018-02-05 15:16:41 -0800 | [diff] [blame] | 980 | return (count >= 0) ? 0 : -errno; |
| 981 | } |