1 /*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define LOG_TAG "audio_hw_utils"
18 //#define LOG_NDEBUG 0
19
20 #include <errno.h>
21 #include <cutils/properties.h>
22 #include <cutils/config_utils.h>
23 #include <stdlib.h>
24 #include <dlfcn.h>
25 #include <unistd.h>
26 #include <cutils/str_parms.h>
27 #include <cutils/log.h>
28 #include <cutils/misc.h>
29
30 #include "acdb.h"
31 #include "audio_hw.h"
32 #include "platform.h"
33 #include "platform_api.h"
34 #include "audio_extn.h"
35
36 #define MAX_LENGTH_MIXER_CONTROL_IN_INT 128
37
set_stream_app_type_mixer_ctrl(struct audio_device * adev,int pcm_device_id,int app_type,int acdb_dev_id,int sample_rate,int stream_type,snd_device_t snd_device)38 static int set_stream_app_type_mixer_ctrl(struct audio_device *adev,
39 int pcm_device_id, int app_type,
40 int acdb_dev_id, int sample_rate,
41 int stream_type,
42 snd_device_t snd_device)
43 {
44
45 char mixer_ctl_name[MAX_LENGTH_MIXER_CONTROL_IN_INT];
46 struct mixer_ctl *ctl;
47 int app_type_cfg[MAX_LENGTH_MIXER_CONTROL_IN_INT], len = 0, rc = 0;
48 int snd_device_be_idx = -1;
49
50 if (stream_type == PCM_PLAYBACK) {
51 snprintf(mixer_ctl_name, sizeof(mixer_ctl_name),
52 "Audio Stream %d App Type Cfg", pcm_device_id);
53 } else if (stream_type == PCM_CAPTURE) {
54 snprintf(mixer_ctl_name, sizeof(mixer_ctl_name),
55 "Audio Stream Capture %d App Type Cfg", pcm_device_id);
56 }
57
58 ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
59 if (!ctl) {
60 ALOGE("%s: Could not get ctl for mixer cmd - %s",
61 __func__, mixer_ctl_name);
62 rc = -EINVAL;
63 goto exit;
64 }
65 app_type_cfg[len++] = app_type;
66 app_type_cfg[len++] = acdb_dev_id;
67 app_type_cfg[len++] = sample_rate;
68
69 snd_device_be_idx = platform_get_snd_device_backend_index(snd_device);
70 if (snd_device_be_idx > 0)
71 app_type_cfg[len++] = snd_device_be_idx;
72 ALOGV("%s: stream type %d app_type %d, acdb_dev_id %d "
73 "sample rate %d, snd_device_be_idx %d",
74 __func__, stream_type, app_type, acdb_dev_id, sample_rate,
75 snd_device_be_idx);
76 mixer_ctl_set_array(ctl, app_type_cfg, len);
77
78 exit:
79 return rc;
80 }
81
audio_extn_utils_send_default_app_type_cfg(void * platform,struct mixer * mixer)82 void audio_extn_utils_send_default_app_type_cfg(void *platform, struct mixer *mixer)
83 {
84 int app_type_cfg[MAX_LENGTH_MIXER_CONTROL_IN_INT] = {-1};
85 int length = 0, app_type = 0,rc = 0;
86 struct mixer_ctl *ctl = NULL;
87 const char *mixer_ctl_name = "App Type Config";
88
89 ctl = mixer_get_ctl_by_name(mixer, mixer_ctl_name);
90 if (!ctl) {
91 ALOGE("%s: Could not get ctl for mixer cmd - %s",__func__, mixer_ctl_name);
92 return;
93 }
94 rc = platform_get_default_app_type_v2(platform, PCM_PLAYBACK, &app_type);
95 if (rc == 0) {
96 app_type_cfg[length++] = 1;
97 app_type_cfg[length++] = app_type;
98 app_type_cfg[length++] = 48000;
99 app_type_cfg[length++] = 16;
100 mixer_ctl_set_array(ctl, app_type_cfg, length);
101 }
102 return;
103 }
104
flags_to_mode(int dir,uint32_t flags)105 static const char *flags_to_mode(int dir, uint32_t flags)
106 {
107 if (dir == 0) {
108 if (flags & AUDIO_OUTPUT_FLAG_VOIP_RX) {
109 return "voip";
110 }
111 } else if (dir == 1) {
112 if (flags & AUDIO_INPUT_FLAG_VOIP_TX) {
113 return "voip";
114 }
115 }
116 return "default";
117 }
118
audio_extn_utils_send_app_type_cfg_hfp(struct audio_device * adev,struct audio_usecase * usecase)119 static int audio_extn_utils_send_app_type_cfg_hfp(struct audio_device *adev,
120 struct audio_usecase *usecase)
121 {
122 struct mixer_ctl *ctl;
123 int pcm_device_id, acdb_dev_id = 0, snd_device = usecase->out_snd_device;
124 int32_t sample_rate = DEFAULT_OUTPUT_SAMPLING_RATE;
125 int app_type = 0, rc = 0;
126
127 ALOGV("%s", __func__);
128
129 if (usecase->type != PCM_HFP_CALL) {
130 ALOGV("%s: not a playback or HFP path, no need to cfg app type", __func__);
131 rc = 0;
132 goto exit_send_app_type_cfg;
133 }
134 if ((usecase->id != USECASE_AUDIO_HFP_SCO) &&
135 (usecase->id != USECASE_AUDIO_HFP_SCO_WB)) {
136 ALOGV("%s: a playback path where app type cfg is not required", __func__);
137 rc = 0;
138 goto exit_send_app_type_cfg;
139 }
140
141 snd_device = usecase->out_snd_device;
142 pcm_device_id = platform_get_pcm_device_id(usecase->id, PCM_PLAYBACK);
143
144 snd_device = (snd_device == SND_DEVICE_OUT_SPEAKER) ?
145 audio_extn_get_spkr_prot_snd_device(snd_device) : snd_device;
146 acdb_dev_id = platform_get_snd_device_acdb_id(snd_device);
147 if (acdb_dev_id < 0) {
148 ALOGE("%s: Couldn't get the acdb dev id", __func__);
149 rc = -EINVAL;
150 goto exit_send_app_type_cfg;
151 }
152
153 if (usecase->type == PCM_HFP_CALL) {
154
155 /* config HFP session:1 playback path */
156 rc = platform_get_default_app_type_v2(adev->platform, PCM_PLAYBACK, &app_type);
157 if (rc < 0)
158 goto exit_send_app_type_cfg;
159
160 sample_rate= CODEC_BACKEND_DEFAULT_SAMPLE_RATE;
161 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
162 acdb_dev_id, sample_rate,
163 PCM_PLAYBACK,
164 SND_DEVICE_NONE); // use legacy behavior
165 if (rc < 0)
166 goto exit_send_app_type_cfg;
167 /* config HFP session:1 capture path */
168 rc = platform_get_default_app_type_v2(adev->platform, PCM_CAPTURE, &app_type);
169
170 if (rc == 0) {
171 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
172 acdb_dev_id, sample_rate,
173 PCM_CAPTURE,
174 SND_DEVICE_NONE);
175 if (rc < 0)
176 goto exit_send_app_type_cfg;
177 }
178 /* config HFP session:2 capture path */
179 pcm_device_id = HFP_ASM_RX_TX;
180 snd_device = usecase->in_snd_device;
181 acdb_dev_id = platform_get_snd_device_acdb_id(snd_device);
182 if (acdb_dev_id <= 0) {
183 ALOGE("%s: Couldn't get the acdb dev id", __func__);
184 rc = -EINVAL;
185 goto exit_send_app_type_cfg;
186 }
187 rc = platform_get_default_app_type_v2(adev->platform, PCM_CAPTURE, &app_type);
188 if (rc == 0) {
189 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
190 acdb_dev_id, sample_rate, PCM_CAPTURE,
191 SND_DEVICE_NONE);
192 if (rc < 0)
193 goto exit_send_app_type_cfg;
194 }
195
196 /* config HFP session:2 playback path */
197 rc = platform_get_default_app_type_v2(adev->platform, PCM_PLAYBACK, &app_type);
198 if (rc == 0) {
199 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
200 acdb_dev_id, sample_rate,
201 PCM_PLAYBACK, SND_DEVICE_NONE);
202 if (rc < 0)
203 goto exit_send_app_type_cfg;
204 }
205 }
206
207 rc = 0;
208 exit_send_app_type_cfg:
209 return rc;
210 }
211
212
derive_capture_app_type_cfg(struct audio_device * adev,struct audio_usecase * usecase,int * app_type,int * sample_rate)213 static int derive_capture_app_type_cfg(struct audio_device *adev,
214 struct audio_usecase *usecase,
215 int *app_type,
216 int *sample_rate)
217 {
218 if (usecase->stream.in == NULL) {
219 return -1;
220 }
221 struct stream_in *in = usecase->stream.in;
222 struct stream_app_type_cfg *app_type_cfg = &in->app_type_cfg;
223
224 *sample_rate = DEFAULT_INPUT_SAMPLING_RATE;
225 if (audio_is_usb_in_device(in->device)) {
226 platform_check_and_update_copp_sample_rate(adev->platform,
227 usecase->in_snd_device,
228 in->sample_rate,
229 sample_rate);
230 }
231
232 app_type_cfg->mode = flags_to_mode(1 /*capture*/, in->flags);
233 ALOGV("%s mode %s", __func__, app_type_cfg->mode);
234 if (in->format == AUDIO_FORMAT_PCM_16_BIT) {
235 platform_get_app_type_v2(adev->platform,
236 PCM_CAPTURE,
237 app_type_cfg->mode,
238 16,
239 app_type_cfg->sample_rate,
240 app_type);
241 } else if (in->format == AUDIO_FORMAT_PCM_24_BIT_PACKED ||
242 in->format == AUDIO_FORMAT_PCM_8_24_BIT) {
243 platform_get_app_type_v2(adev->platform,
244 PCM_CAPTURE,
245 app_type_cfg->mode,
246 24,
247 app_type_cfg->sample_rate,
248 app_type);
249 } else if (in->format == AUDIO_FORMAT_PCM_32_BIT) {
250 platform_get_app_type_v2(adev->platform,
251 PCM_CAPTURE,
252 app_type_cfg->mode,
253 32,
254 app_type_cfg->sample_rate,
255 app_type);
256 } else {
257 ALOGE("%s bad format\n", __func__);
258 return -1;
259 }
260
261 app_type_cfg->app_type = *app_type;
262 app_type_cfg->sample_rate = *sample_rate;
263 return 0;
264 }
265
derive_playback_app_type_cfg(struct audio_device * adev,struct audio_usecase * usecase,int * app_type,int * sample_rate)266 static int derive_playback_app_type_cfg(struct audio_device *adev,
267 struct audio_usecase *usecase,
268 int *app_type,
269 int *sample_rate)
270 {
271 if (usecase->stream.out == NULL) {
272 return -1;
273 }
274 struct stream_out *out = usecase->stream.out;
275 struct stream_app_type_cfg *app_type_cfg = &out->app_type_cfg;
276
277 *sample_rate = DEFAULT_OUTPUT_SAMPLING_RATE;
278
279 // add speaker prot changes if needed
280 // and use that to check for device
281 if (audio_is_usb_out_device(out->devices)) {
282 platform_check_and_update_copp_sample_rate(adev->platform,
283 usecase->out_snd_device,
284 out->sample_rate,
285 sample_rate);
286 }
287
288 app_type_cfg->mode = flags_to_mode(0 /*playback*/, out->flags);
289 if (!audio_is_linear_pcm(out->format)) {
290 platform_get_app_type_v2(adev->platform,
291 PCM_PLAYBACK,
292 app_type_cfg->mode,
293 24,
294 *sample_rate,
295 app_type);
296 ALOGV("Non pcm got app type %d", *app_type);
297 } else if (out->format == AUDIO_FORMAT_PCM_16_BIT) {
298 platform_get_app_type_v2(adev->platform,
299 PCM_PLAYBACK,
300 app_type_cfg->mode,
301 16,
302 *sample_rate,
303 app_type);
304 } else if (out->format == AUDIO_FORMAT_PCM_24_BIT_PACKED ||
305 out->format == AUDIO_FORMAT_PCM_8_24_BIT) {
306 platform_get_app_type_v2(adev->platform,
307 PCM_PLAYBACK,
308 app_type_cfg->mode,
309 24,
310 *sample_rate,
311 app_type);
312 } else if (out->format == AUDIO_FORMAT_PCM_32_BIT) {
313 platform_get_app_type_v2(adev->platform,
314 PCM_PLAYBACK,
315 app_type_cfg->mode,
316 32,
317 *sample_rate,
318 app_type);
319 } else {
320 ALOGE("%s bad format\n", __func__);
321 return -1;
322 }
323
324 app_type_cfg->app_type = *app_type;
325 app_type_cfg->sample_rate = *sample_rate;
326 return 0;
327 }
328
derive_acdb_dev_id(struct audio_device * adev __unused,struct audio_usecase * usecase)329 static int derive_acdb_dev_id(struct audio_device *adev __unused,
330 struct audio_usecase *usecase)
331 {
332 struct stream_out *out;
333 struct stream_in *in;
334
335 if (usecase->type == PCM_PLAYBACK) {
336 return platform_get_snd_device_acdb_id(usecase->out_snd_device);
337 } else if(usecase->type == PCM_CAPTURE) {
338 return platform_get_snd_device_acdb_id(usecase->in_snd_device);
339 }
340 return -1;
341 }
342
audio_extn_utils_send_app_type_cfg(struct audio_device * adev,struct audio_usecase * usecase)343 int audio_extn_utils_send_app_type_cfg(struct audio_device *adev,
344 struct audio_usecase *usecase)
345 {
346 int len = 0;
347 int sample_rate;
348 int app_type;
349 int acdb_dev_id;
350 size_t app_type_cfg[MAX_LENGTH_MIXER_CONTROL_IN_INT] = {0};
351 char mixer_ctl_name[MAX_LENGTH_MIXER_CONTROL_IN_INT] = {0};
352 int pcm_device_id;
353 struct mixer_ctl *ctl;
354 int ret;
355
356 if (usecase->type == PCM_HFP_CALL) {
357 return audio_extn_utils_send_app_type_cfg_hfp(adev, usecase);
358 }
359
360 if (!platform_supports_app_type_cfg())
361 return -1;
362
363 if (usecase->type == PCM_PLAYBACK) {
364 ret = derive_playback_app_type_cfg(adev,
365 usecase,
366 &app_type,
367 &sample_rate);
368 } else if (usecase->type == PCM_CAPTURE) {
369 ret = derive_capture_app_type_cfg(adev,
370 usecase,
371 &app_type,
372 &sample_rate);
373 } else {
374 ALOGE("%s: Invalid uc type : 0x%x", __func__, usecase->type);
375 return -1;
376 }
377
378 if (ret < 0) {
379 ALOGE("%s: Failed to derive app_type for uc type : 0x%x", __func__,
380 usecase->type);
381 return -1;
382 }
383
384 acdb_dev_id = derive_acdb_dev_id(adev, usecase);
385 if (acdb_dev_id <= 0) {
386 ALOGE("%s: Couldn't get the acdb dev id", __func__);
387 return -1;
388 }
389
390 pcm_device_id = platform_get_pcm_device_id(usecase->id, usecase->type);
391 set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type, acdb_dev_id,
392 sample_rate,
393 usecase->type,
394 usecase->type == PCM_PLAYBACK ? usecase->out_snd_device :
395 usecase->in_snd_device);
396 return 0;
397 }
398
audio_extn_utils_send_app_type_gain(struct audio_device * adev,int app_type,int * gain)399 int audio_extn_utils_send_app_type_gain(struct audio_device *adev,
400 int app_type,
401 int *gain)
402 {
403 int gain_cfg[4];
404 const char *mixer_ctl_name = "App Type Gain";
405 struct mixer_ctl *ctl;
406 ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
407 if (!ctl) {
408 ALOGE("%s: Could not get volume ctl mixer %s", __func__,
409 mixer_ctl_name);
410 return -EINVAL;
411 }
412 gain_cfg[0] = 0;
413 gain_cfg[1] = app_type;
414 gain_cfg[2] = gain[0];
415 gain_cfg[3] = gain[1];
416 ALOGV("%s app_type %d l(%d) r(%d)", __func__, app_type, gain[0], gain[1]);
417 return mixer_ctl_set_array(ctl, gain_cfg,
418 sizeof(gain_cfg)/sizeof(gain_cfg[0]));
419 }
420
421 // this assumes correct app_type and sample_rate fields
422 // have been set for the stream using audio_extn_utils_send_app_type_cfg
audio_extn_utils_send_audio_calibration(struct audio_device * adev,struct audio_usecase * usecase)423 void audio_extn_utils_send_audio_calibration(struct audio_device *adev,
424 struct audio_usecase *usecase)
425 {
426 int type = usecase->type;
427 int app_type = 0;
428
429 if (type == PCM_PLAYBACK && usecase->stream.out != NULL) {
430 struct stream_out *out = usecase->stream.out;
431 ALOGV("%s send cal for app_type %d, rate %d", __func__,
432 out->app_type_cfg.app_type,
433 out->app_type_cfg.sample_rate);
434 platform_send_audio_calibration_v2(adev->platform, usecase,
435 out->app_type_cfg.app_type,
436 out->app_type_cfg.sample_rate);
437 } else if (type == PCM_CAPTURE && usecase->stream.in != NULL) {
438 struct stream_in *in = usecase->stream.in;
439 ALOGV("%s send cal for capture app_type %d, rate %d", __func__,
440 in->app_type_cfg.app_type,
441 in->app_type_cfg.sample_rate);
442 platform_send_audio_calibration_v2(adev->platform, usecase,
443 in->app_type_cfg.app_type,
444 in->app_type_cfg.sample_rate);
445 } else {
446 /* when app type is default. the sample rate is not used to send cal */
447 platform_get_default_app_type_v2(adev->platform, type, &app_type);
448 platform_send_audio_calibration_v2(adev->platform, usecase, app_type,
449 48000);
450 }
451 }
452
453 #define MAX_SND_CARD 8
454 #define RETRY_US 500000
455 #define RETRY_NUMBER 10
456
457 #define min(a, b) ((a) < (b) ? (a) : (b))
458
459 static const char *kConfigLocationList[] =
460 {"/odm/etc", "/vendor/etc", "/system/etc"};
461 static const int kConfigLocationListSize =
462 (sizeof(kConfigLocationList) / sizeof(kConfigLocationList[0]));
463
audio_extn_utils_resolve_config_file(char file_name[MIXER_PATH_MAX_LENGTH])464 bool audio_extn_utils_resolve_config_file(char file_name[MIXER_PATH_MAX_LENGTH])
465 {
466 char full_config_path[MIXER_PATH_MAX_LENGTH];
467 for (int i = 0; i < kConfigLocationListSize; i++) {
468 snprintf(full_config_path,
469 MIXER_PATH_MAX_LENGTH,
470 "%s/%s",
471 kConfigLocationList[i],
472 file_name);
473 if (F_OK == access(full_config_path, 0)) {
474 strcpy(file_name, full_config_path);
475 return true;
476 }
477 }
478 return false;
479 }
480
481 /* platform_info_file should be size 'MIXER_PATH_MAX_LENGTH' */
audio_extn_utils_get_platform_info(const char * snd_card_name,char * platform_info_file)482 int audio_extn_utils_get_platform_info(const char* snd_card_name, char* platform_info_file)
483 {
484 if (NULL == snd_card_name) {
485 return -1;
486 }
487
488 struct snd_card_split *snd_split_handle = NULL;
489 int ret = 0;
490 audio_extn_set_snd_card_split(snd_card_name);
491 snd_split_handle = audio_extn_get_snd_card_split();
492
493 snprintf(platform_info_file, MIXER_PATH_MAX_LENGTH, "%s_%s_%s.xml",
494 PLATFORM_INFO_XML_BASE_STRING, snd_split_handle->snd_card,
495 snd_split_handle->form_factor);
496
497 if (!audio_extn_utils_resolve_config_file(platform_info_file)) {
498 memset(platform_info_file, 0, MIXER_PATH_MAX_LENGTH);
499 snprintf(platform_info_file, MIXER_PATH_MAX_LENGTH, "%s_%s.xml",
500 PLATFORM_INFO_XML_BASE_STRING, snd_split_handle->snd_card);
501
502 if (!audio_extn_utils_resolve_config_file(platform_info_file)) {
503 memset(platform_info_file, 0, MIXER_PATH_MAX_LENGTH);
504 strlcpy(platform_info_file, PLATFORM_INFO_XML_PATH, MIXER_PATH_MAX_LENGTH);
505 ret = audio_extn_utils_resolve_config_file(platform_info_file) ? 0 : -1;
506 }
507 }
508
509 return ret;
510 }
511
audio_extn_utils_get_snd_card_num()512 int audio_extn_utils_get_snd_card_num()
513 {
514
515 void *hw_info = NULL;
516 struct mixer *mixer = NULL;
517 int retry_num = 0;
518 int snd_card_num = 0;
519 const char* snd_card_name = NULL;
520 char platform_info_file[MIXER_PATH_MAX_LENGTH]= {0};
521
522 struct acdb_platform_data *my_data = calloc(1, sizeof(struct acdb_platform_data));
523
524 bool card_verifed[MAX_SND_CARD] = {0};
525 const int retry_limit = property_get_int32("audio.snd_card.open.retries", RETRY_NUMBER);
526
527 for (;;) {
528 if (snd_card_num >= MAX_SND_CARD) {
529 if (retry_num++ >= retry_limit) {
530 ALOGE("%s: Unable to find correct sound card, aborting.", __func__);
531 snd_card_num = -1;
532 goto done;
533 }
534
535 snd_card_num = 0;
536 usleep(RETRY_US);
537 continue;
538 }
539
540 if (card_verifed[snd_card_num]) {
541 ++snd_card_num;
542 continue;
543 }
544
545 mixer = mixer_open(snd_card_num);
546
547 if (!mixer) {
548 ALOGE("%s: Unable to open the mixer card: %d", __func__,
549 snd_card_num);
550 ++snd_card_num;
551 continue;
552 }
553
554 card_verifed[snd_card_num] = true;
555
556 snd_card_name = mixer_get_name(mixer);
557 hw_info = hw_info_init(snd_card_name);
558
559 if (audio_extn_utils_get_platform_info(snd_card_name, platform_info_file) < 0) {
560 ALOGE("Failed to find platform_info_file");
561 goto cleanup;
562 }
563
564 /* Initialize snd card name specific ids and/or backends*/
565 if (snd_card_info_init(platform_info_file, my_data,
566 &acdb_set_parameters) < 0) {
567 ALOGE("Failed to find platform_info_file");
568 goto cleanup;
569 }
570
571 /* validate the sound card name
572 * my_data->snd_card_name can contain
573 * <a> complete sound card name, i.e. <device>-<codec>-<form_factor>-snd-card
574 * example: msm8994-tomtom-mtp-snd-card
575 * <b> or sub string of the card name, i.e. <device>-<codec>
576 * example: msm8994-tomtom
577 * snd_card_name is truncated to 32 charaters as per mixer_get_name() implementation
578 * so use min of my_data->snd_card_name and snd_card_name length for comparison
579 */
580
581 if (my_data->snd_card_name != NULL &&
582 strncmp(snd_card_name, my_data->snd_card_name,
583 min(strlen(snd_card_name), strlen(my_data->snd_card_name))) != 0) {
584 ALOGI("%s: found valid sound card %s, but not primary sound card %s",
585 __func__, snd_card_name, my_data->snd_card_name);
586 goto cleanup;
587 }
588
589 ALOGI("%s: found sound card %s, primary sound card expected is %s",
590 __func__, snd_card_name, my_data->snd_card_name);
591 break;
592 cleanup:
593 ++snd_card_num;
594 mixer_close(mixer);
595 mixer = NULL;
596 hw_info_deinit(hw_info);
597 hw_info = NULL;
598 }
599
600 done:
601 mixer_close(mixer);
602 hw_info_deinit(hw_info);
603
604 if (my_data)
605 free(my_data);
606
607 return snd_card_num;
608 }
609