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 <log/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 acdb_dev_id = platform_get_snd_device_acdb_id(snd_device);
145 if (acdb_dev_id < 0) {
146 ALOGE("%s: Couldn't get the acdb dev id", __func__);
147 rc = -EINVAL;
148 goto exit_send_app_type_cfg;
149 }
150
151 if (usecase->type == PCM_HFP_CALL) {
152
153 /* config HFP session:1 playback path */
154 rc = platform_get_default_app_type_v2(adev->platform, PCM_PLAYBACK, &app_type);
155 if (rc < 0)
156 goto exit_send_app_type_cfg;
157
158 sample_rate= CODEC_BACKEND_DEFAULT_SAMPLE_RATE;
159 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
160 acdb_dev_id, sample_rate,
161 PCM_PLAYBACK,
162 SND_DEVICE_NONE); // use legacy behavior
163 if (rc < 0)
164 goto exit_send_app_type_cfg;
165 /* config HFP session:1 capture path */
166 rc = platform_get_default_app_type_v2(adev->platform, PCM_CAPTURE, &app_type);
167
168 if (rc == 0) {
169 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
170 acdb_dev_id, sample_rate,
171 PCM_CAPTURE,
172 SND_DEVICE_NONE);
173 if (rc < 0)
174 goto exit_send_app_type_cfg;
175 }
176 /* config HFP session:2 capture path */
177 pcm_device_id = HFP_ASM_RX_TX;
178 snd_device = usecase->in_snd_device;
179 acdb_dev_id = platform_get_snd_device_acdb_id(snd_device);
180 if (acdb_dev_id <= 0) {
181 ALOGE("%s: Couldn't get the acdb dev id", __func__);
182 rc = -EINVAL;
183 goto exit_send_app_type_cfg;
184 }
185 rc = platform_get_default_app_type_v2(adev->platform, PCM_CAPTURE, &app_type);
186 if (rc == 0) {
187 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
188 acdb_dev_id, sample_rate, PCM_CAPTURE,
189 SND_DEVICE_NONE);
190 if (rc < 0)
191 goto exit_send_app_type_cfg;
192 }
193
194 /* config HFP session:2 playback path */
195 rc = platform_get_default_app_type_v2(adev->platform, PCM_PLAYBACK, &app_type);
196 if (rc == 0) {
197 rc = set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type,
198 acdb_dev_id, sample_rate,
199 PCM_PLAYBACK, SND_DEVICE_NONE);
200 if (rc < 0)
201 goto exit_send_app_type_cfg;
202 }
203 }
204
205 rc = 0;
206 exit_send_app_type_cfg:
207 return rc;
208 }
209
210
derive_capture_app_type_cfg(struct audio_device * adev,struct audio_usecase * usecase,int * app_type,int * sample_rate)211 static int derive_capture_app_type_cfg(struct audio_device *adev,
212 struct audio_usecase *usecase,
213 int *app_type,
214 int *sample_rate)
215 {
216 if (usecase->stream.in == NULL) {
217 return -1;
218 }
219 struct stream_in *in = usecase->stream.in;
220 struct stream_app_type_cfg *app_type_cfg = &in->app_type_cfg;
221
222 *sample_rate = DEFAULT_INPUT_SAMPLING_RATE;
223 if (audio_is_usb_in_device(in->device)) {
224 platform_check_and_update_copp_sample_rate(adev->platform,
225 usecase->in_snd_device,
226 in->sample_rate,
227 sample_rate);
228 }
229
230 app_type_cfg->mode = flags_to_mode(1 /*capture*/, in->flags);
231 ALOGV("%s mode %s", __func__, app_type_cfg->mode);
232 if (in->format == AUDIO_FORMAT_PCM_16_BIT) {
233 platform_get_app_type_v2(adev->platform,
234 PCM_CAPTURE,
235 app_type_cfg->mode,
236 16,
237 app_type_cfg->sample_rate,
238 app_type);
239 } else if (in->format == AUDIO_FORMAT_PCM_24_BIT_PACKED ||
240 in->format == AUDIO_FORMAT_PCM_8_24_BIT) {
241 platform_get_app_type_v2(adev->platform,
242 PCM_CAPTURE,
243 app_type_cfg->mode,
244 24,
245 app_type_cfg->sample_rate,
246 app_type);
247 } else if (in->format == AUDIO_FORMAT_PCM_32_BIT) {
248 platform_get_app_type_v2(adev->platform,
249 PCM_CAPTURE,
250 app_type_cfg->mode,
251 32,
252 app_type_cfg->sample_rate,
253 app_type);
254 } else {
255 ALOGE("%s bad format\n", __func__);
256 return -1;
257 }
258
259 app_type_cfg->app_type = *app_type;
260 app_type_cfg->sample_rate = *sample_rate;
261 return 0;
262 }
263
derive_playback_app_type_cfg(struct audio_device * adev,struct audio_usecase * usecase,int * app_type,int * sample_rate)264 static int derive_playback_app_type_cfg(struct audio_device *adev,
265 struct audio_usecase *usecase,
266 int *app_type,
267 int *sample_rate)
268 {
269 if (usecase->stream.out == NULL) {
270 return -1;
271 }
272 struct stream_out *out = usecase->stream.out;
273 struct stream_app_type_cfg *app_type_cfg = &out->app_type_cfg;
274
275 *sample_rate = DEFAULT_OUTPUT_SAMPLING_RATE;
276
277 // add speaker prot changes if needed
278 // and use that to check for device
279 if (audio_is_usb_out_device(out->devices)) {
280 platform_check_and_update_copp_sample_rate(adev->platform,
281 usecase->out_snd_device,
282 out->sample_rate,
283 sample_rate);
284 }
285
286 app_type_cfg->mode = flags_to_mode(0 /*playback*/, out->flags);
287 if (!audio_is_linear_pcm(out->format)) {
288 platform_get_app_type_v2(adev->platform,
289 PCM_PLAYBACK,
290 app_type_cfg->mode,
291 24,
292 *sample_rate,
293 app_type);
294 ALOGV("Non pcm got app type %d", *app_type);
295 } else if (out->format == AUDIO_FORMAT_PCM_16_BIT) {
296 platform_get_app_type_v2(adev->platform,
297 PCM_PLAYBACK,
298 app_type_cfg->mode,
299 16,
300 *sample_rate,
301 app_type);
302 } else if (out->format == AUDIO_FORMAT_PCM_24_BIT_PACKED ||
303 out->format == AUDIO_FORMAT_PCM_8_24_BIT) {
304 platform_get_app_type_v2(adev->platform,
305 PCM_PLAYBACK,
306 app_type_cfg->mode,
307 24,
308 *sample_rate,
309 app_type);
310 } else if (out->format == AUDIO_FORMAT_PCM_32_BIT) {
311 platform_get_app_type_v2(adev->platform,
312 PCM_PLAYBACK,
313 app_type_cfg->mode,
314 32,
315 *sample_rate,
316 app_type);
317 } else {
318 ALOGE("%s bad format\n", __func__);
319 return -1;
320 }
321
322 app_type_cfg->app_type = *app_type;
323 app_type_cfg->sample_rate = *sample_rate;
324 return 0;
325 }
326
derive_acdb_dev_id(struct audio_device * adev __unused,struct audio_usecase * usecase)327 static int derive_acdb_dev_id(struct audio_device *adev __unused,
328 struct audio_usecase *usecase)
329 {
330 struct stream_out *out;
331 struct stream_in *in;
332
333 if (usecase->type == PCM_PLAYBACK) {
334 return platform_get_snd_device_acdb_id(usecase->out_snd_device);
335 } else if(usecase->type == PCM_CAPTURE) {
336 return platform_get_snd_device_acdb_id(usecase->in_snd_device);
337 }
338 return -1;
339 }
340
audio_extn_utils_send_app_type_cfg(struct audio_device * adev,struct audio_usecase * usecase)341 int audio_extn_utils_send_app_type_cfg(struct audio_device *adev,
342 struct audio_usecase *usecase)
343 {
344 int len = 0;
345 int sample_rate;
346 int app_type;
347 int acdb_dev_id;
348 size_t app_type_cfg[MAX_LENGTH_MIXER_CONTROL_IN_INT] = {0};
349 char mixer_ctl_name[MAX_LENGTH_MIXER_CONTROL_IN_INT] = {0};
350 int pcm_device_id;
351 struct mixer_ctl *ctl;
352 int ret;
353
354 if (usecase->type == PCM_HFP_CALL) {
355 return audio_extn_utils_send_app_type_cfg_hfp(adev, usecase);
356 }
357
358 if (!platform_supports_app_type_cfg())
359 return -1;
360
361 if (usecase->type == PCM_PLAYBACK) {
362 ret = derive_playback_app_type_cfg(adev,
363 usecase,
364 &app_type,
365 &sample_rate);
366 } else if (usecase->type == PCM_CAPTURE) {
367 ret = derive_capture_app_type_cfg(adev,
368 usecase,
369 &app_type,
370 &sample_rate);
371 } else {
372 ALOGE("%s: Invalid uc type : 0x%x", __func__, usecase->type);
373 return -1;
374 }
375
376 if (ret < 0) {
377 ALOGE("%s: Failed to derive app_type for uc type : 0x%x", __func__,
378 usecase->type);
379 return -1;
380 }
381
382 acdb_dev_id = derive_acdb_dev_id(adev, usecase);
383 if (acdb_dev_id <= 0) {
384 ALOGE("%s: Couldn't get the acdb dev id", __func__);
385 return -1;
386 }
387
388 pcm_device_id = platform_get_pcm_device_id(usecase->id, usecase->type);
389 set_stream_app_type_mixer_ctrl(adev, pcm_device_id, app_type, acdb_dev_id,
390 sample_rate,
391 usecase->type,
392 usecase->type == PCM_PLAYBACK ? usecase->out_snd_device :
393 usecase->in_snd_device);
394 return 0;
395 }
396
audio_extn_utils_send_app_type_gain(struct audio_device * adev,int app_type,int * gain)397 int audio_extn_utils_send_app_type_gain(struct audio_device *adev,
398 int app_type,
399 int *gain)
400 {
401 int gain_cfg[4];
402 const char *mixer_ctl_name = "App Type Gain";
403 struct mixer_ctl *ctl;
404 ctl = mixer_get_ctl_by_name(adev->mixer, mixer_ctl_name);
405 if (!ctl) {
406 ALOGE("%s: Could not get volume ctl mixer %s", __func__,
407 mixer_ctl_name);
408 return -EINVAL;
409 }
410 gain_cfg[0] = 0;
411 gain_cfg[1] = app_type;
412 gain_cfg[2] = gain[0];
413 gain_cfg[3] = gain[1];
414 ALOGV("%s app_type %d l(%d) r(%d)", __func__, app_type, gain[0], gain[1]);
415 return mixer_ctl_set_array(ctl, gain_cfg,
416 sizeof(gain_cfg)/sizeof(gain_cfg[0]));
417 }
418
419 // this assumes correct app_type and sample_rate fields
420 // 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)421 void audio_extn_utils_send_audio_calibration(struct audio_device *adev,
422 struct audio_usecase *usecase)
423 {
424 int type = usecase->type;
425 int app_type = 0;
426
427 if (type == PCM_PLAYBACK && usecase->stream.out != NULL) {
428 struct stream_out *out = usecase->stream.out;
429 ALOGV("%s send cal for app_type %d, rate %d", __func__,
430 out->app_type_cfg.app_type,
431 out->app_type_cfg.sample_rate);
432 platform_send_audio_calibration_v2(adev->platform, usecase,
433 out->app_type_cfg.app_type,
434 out->app_type_cfg.sample_rate);
435 } else if (type == PCM_CAPTURE && usecase->stream.in != NULL) {
436 struct stream_in *in = usecase->stream.in;
437 ALOGV("%s send cal for capture app_type %d, rate %d", __func__,
438 in->app_type_cfg.app_type,
439 in->app_type_cfg.sample_rate);
440 platform_send_audio_calibration_v2(adev->platform, usecase,
441 in->app_type_cfg.app_type,
442 in->app_type_cfg.sample_rate);
443 } else {
444 /* when app type is default. the sample rate is not used to send cal */
445 platform_get_default_app_type_v2(adev->platform, type, &app_type);
446 platform_send_audio_calibration_v2(adev->platform, usecase, app_type,
447 48000);
448 }
449 }
450
451 #define MAX_SND_CARD 8
452 #define RETRY_US 500000
453 #define RETRY_NUMBER 10
454
455 #define min(a, b) ((a) < (b) ? (a) : (b))
456
457 static const char *kConfigLocationList[] =
458 {"/odm/etc", "/vendor/etc", "/system/etc"};
459 static const int kConfigLocationListSize =
460 (sizeof(kConfigLocationList) / sizeof(kConfigLocationList[0]));
461
audio_extn_utils_resolve_config_file(char file_name[MIXER_PATH_MAX_LENGTH])462 bool audio_extn_utils_resolve_config_file(char file_name[MIXER_PATH_MAX_LENGTH])
463 {
464 char full_config_path[MIXER_PATH_MAX_LENGTH];
465 for (int i = 0; i < kConfigLocationListSize; i++) {
466 snprintf(full_config_path,
467 MIXER_PATH_MAX_LENGTH,
468 "%s/%s",
469 kConfigLocationList[i],
470 file_name);
471 if (F_OK == access(full_config_path, 0)) {
472 strcpy(file_name, full_config_path);
473 return true;
474 }
475 }
476 return false;
477 }
478
479 /* 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)480 int audio_extn_utils_get_platform_info(const char* snd_card_name, char* platform_info_file)
481 {
482 if (NULL == snd_card_name) {
483 return -1;
484 }
485
486 struct snd_card_split *snd_split_handle = NULL;
487 int ret = 0;
488 audio_extn_set_snd_card_split(snd_card_name);
489 snd_split_handle = audio_extn_get_snd_card_split();
490
491 snprintf(platform_info_file, MIXER_PATH_MAX_LENGTH, "%s_%s_%s.xml",
492 PLATFORM_INFO_XML_BASE_STRING, snd_split_handle->snd_card,
493 snd_split_handle->form_factor);
494
495 if (!audio_extn_utils_resolve_config_file(platform_info_file)) {
496 memset(platform_info_file, 0, MIXER_PATH_MAX_LENGTH);
497 snprintf(platform_info_file, MIXER_PATH_MAX_LENGTH, "%s_%s.xml",
498 PLATFORM_INFO_XML_BASE_STRING, snd_split_handle->snd_card);
499
500 if (!audio_extn_utils_resolve_config_file(platform_info_file)) {
501 memset(platform_info_file, 0, MIXER_PATH_MAX_LENGTH);
502 strlcpy(platform_info_file, PLATFORM_INFO_XML_PATH, MIXER_PATH_MAX_LENGTH);
503 ret = audio_extn_utils_resolve_config_file(platform_info_file) ? 0 : -1;
504 }
505 }
506
507 return ret;
508 }
509
audio_extn_utils_get_snd_card_num()510 int audio_extn_utils_get_snd_card_num()
511 {
512
513 void *hw_info = NULL;
514 struct mixer *mixer = NULL;
515 int retry_num = 0;
516 int snd_card_num = 0;
517 const char* snd_card_name = NULL;
518 char platform_info_file[MIXER_PATH_MAX_LENGTH]= {0};
519
520 struct acdb_platform_data *my_data = calloc(1, sizeof(struct acdb_platform_data));
521
522 bool card_verifed[MAX_SND_CARD] = {0};
523 const int retry_limit = property_get_int32("audio.snd_card.open.retries", RETRY_NUMBER);
524
525 for (;;) {
526 if (snd_card_num >= MAX_SND_CARD) {
527 if (retry_num++ >= retry_limit) {
528 ALOGE("%s: Unable to find correct sound card, aborting.", __func__);
529 snd_card_num = -1;
530 goto done;
531 }
532
533 snd_card_num = 0;
534 usleep(RETRY_US);
535 continue;
536 }
537
538 if (card_verifed[snd_card_num]) {
539 ++snd_card_num;
540 continue;
541 }
542
543 mixer = mixer_open(snd_card_num);
544
545 if (!mixer) {
546 ALOGE("%s: Unable to open the mixer card: %d", __func__,
547 snd_card_num);
548 ++snd_card_num;
549 continue;
550 }
551
552 card_verifed[snd_card_num] = true;
553
554 snd_card_name = mixer_get_name(mixer);
555 hw_info = hw_info_init(snd_card_name);
556
557 if (audio_extn_utils_get_platform_info(snd_card_name, platform_info_file) < 0) {
558 ALOGE("Failed to find platform_info_file");
559 goto cleanup;
560 }
561
562 /* Initialize snd card name specific ids and/or backends*/
563 if (snd_card_info_init(platform_info_file, my_data,
564 &acdb_set_parameters) < 0) {
565 ALOGE("Failed to find platform_info_file");
566 goto cleanup;
567 }
568
569 /* validate the sound card name
570 * my_data->snd_card_name can contain
571 * <a> complete sound card name, i.e. <device>-<codec>-<form_factor>-snd-card
572 * example: msm8994-tomtom-mtp-snd-card
573 * <b> or sub string of the card name, i.e. <device>-<codec>
574 * example: msm8994-tomtom
575 * snd_card_name is truncated to 32 charaters as per mixer_get_name() implementation
576 * so use min of my_data->snd_card_name and snd_card_name length for comparison
577 */
578
579 if (my_data->snd_card_name != NULL &&
580 strncmp(snd_card_name, my_data->snd_card_name,
581 min(strlen(snd_card_name), strlen(my_data->snd_card_name))) != 0) {
582 ALOGI("%s: found valid sound card %s, but not primary sound card %s",
583 __func__, snd_card_name, my_data->snd_card_name);
584 goto cleanup;
585 }
586
587 ALOGI("%s: found sound card %s, primary sound card expected is %s",
588 __func__, snd_card_name, my_data->snd_card_name);
589 break;
590 cleanup:
591 ++snd_card_num;
592 mixer_close(mixer);
593 mixer = NULL;
594 hw_info_deinit(hw_info);
595 hw_info = NULL;
596 }
597
598 done:
599 mixer_close(mixer);
600 hw_info_deinit(hw_info);
601
602 if (my_data)
603 free(my_data);
604
605 return snd_card_num;
606 }
607