| /* |
| ** Copyright (c) 2019, The Linux Foundation. All rights reserved. |
| ** |
| ** Redistribution and use in source and binary forms, with or without |
| ** modification, are permitted provided that the following conditions are |
| ** met: |
| ** * Redistributions of source code must retain the above copyright |
| ** notice, this list of conditions and the following disclaimer. |
| ** * Redistributions in binary form must reproduce the above |
| ** copyright notice, this list of conditions and the following |
| ** disclaimer in the documentation and/or other materials provided |
| ** with the distribution. |
| ** * Neither the name of The Linux Foundation nor the names of its |
| ** contributors may be used to endorse or promote products derived |
| ** from this software without specific prior written permission. |
| ** |
| ** THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED |
| ** WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF |
| ** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT |
| ** ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS |
| ** BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| ** CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| ** SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR |
| ** BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| ** WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE |
| ** OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN |
| ** IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| **/ |
| |
| #include <errno.h> |
| #include <expat.h> |
| #include <pthread.h> |
| #include <snd-card-def.h> |
| #include <stdbool.h> |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <unistd.h> |
| |
| #include <agm/agm_list.h> |
| |
| #define MAX_PATH 256 |
| #define BUF_SIZE 1024 |
| |
| |
| struct snd_prop_val_pair { |
| char *prop; |
| char *val; |
| struct listnode list_node; |
| }; |
| |
| struct snd_dev_def { |
| enum snd_node_type node_type; |
| |
| struct snd_dev_def_card *card; |
| |
| /* Mandatory properties from XML */ |
| unsigned int device; |
| int type; |
| char *name; |
| char *so_name; |
| |
| struct listnode list_node; |
| |
| /* List of custom properties */ |
| struct listnode prop_val_list; |
| }; |
| |
| struct snd_dev_def_card { |
| unsigned int card; |
| int type; |
| char *name; |
| |
| int refcnt; |
| struct listnode list_node; |
| /* child device details */ |
| struct listnode pcm_devs_list; |
| struct listnode mixer_devs_list; |
| struct listnode compr_devs_list; |
| }; |
| |
| static struct listnode snd_card_list; |
| static bool snd_card_list_init = false; |
| static pthread_rwlock_t snd_rwlock = PTHREAD_RWLOCK_INITIALIZER; |
| |
| typedef enum { |
| TAG_ROOT, |
| TAG_CARD, |
| TAG_DEVICE, |
| TAG_PLUGIN, |
| TAG_DEV_PROPS, |
| } snd_card_defs_xml_tags_t; |
| |
| struct xml_userdata { |
| char data_buf[BUF_SIZE]; |
| size_t offs; |
| |
| unsigned int card; |
| char *card_name; |
| struct snd_dev_def_card *cur_card_def; |
| struct snd_dev_def *cur_dev_def; |
| bool card_found; |
| bool card_parsed; |
| snd_card_defs_xml_tags_t current_tag; |
| }; |
| |
| static void snd_process_data_buf(struct xml_userdata *data, const XML_Char *tag_name); |
| static void snd_dev_def_init(struct xml_userdata *data, const XML_Char *tag_name, enum snd_node_type node_type); |
| |
| static void snd_reset_data_buf(struct xml_userdata *data) |
| { |
| data->offs = 0; |
| data->data_buf[data->offs] = '\0'; |
| } |
| |
| static void snd_dev_set_type(struct snd_dev_def *dev_def, int type) |
| { |
| if (dev_def) |
| dev_def->type = type; |
| } |
| |
| static void snd_start_tag(void *userdata, const XML_Char *tag_name, |
| const XML_Char **attr) |
| { |
| struct xml_userdata *data = (struct xml_userdata *)userdata; |
| enum snd_node_type node_type = -1; |
| |
| if (data->card_parsed) |
| return; |
| |
| snd_reset_data_buf(data); |
| |
| if (!strcmp(tag_name, "card")) |
| data->current_tag = TAG_CARD; |
| |
| if (!strcmp(tag_name, "pcm-device")) { |
| data->current_tag = TAG_DEVICE; |
| node_type = SND_NODE_TYPE_PCM; |
| } else if (!strcmp(tag_name, "compress-device")) { |
| data->current_tag = TAG_DEVICE; |
| node_type = SND_NODE_TYPE_COMPR; |
| } else if (!strcmp(tag_name, "mixer")) { |
| data->current_tag = TAG_DEVICE; |
| node_type = SND_NODE_TYPE_MIXER; |
| } else if (strstr(tag_name, "plugin")) { |
| snd_dev_set_type(data->cur_dev_def, SND_NODE_DEV_TYPE_PLUGIN); |
| data->current_tag = TAG_PLUGIN; |
| } else if (!strcmp(tag_name, "props")) { |
| data->current_tag = TAG_DEV_PROPS; |
| } |
| |
| if (data->current_tag != TAG_CARD && !data->card_found) |
| return; |
| |
| snd_dev_def_init(data, tag_name, node_type); |
| } |
| |
| static void snd_end_tag(void *userdata, const XML_Char *tag_name) |
| { |
| struct xml_userdata *data = (struct xml_userdata *)userdata; |
| |
| if (data->card_parsed) |
| return; |
| if (data->current_tag != TAG_CARD && !data->card_found) |
| return; |
| |
| snd_process_data_buf(data, tag_name); |
| snd_reset_data_buf(data); |
| if (!strcmp(tag_name, "mixer") || !strcmp(tag_name, "pcm-device") || !strcmp(tag_name, "compress-device")) |
| data->current_tag = TAG_CARD; |
| else if (strstr(tag_name, "plugin") || !strcmp(tag_name, "props")) |
| data->current_tag = TAG_DEVICE; |
| else if(!strcmp(tag_name, "card")) { |
| data->current_tag = TAG_ROOT; |
| if (data->card_found) |
| data->card_parsed = true; |
| } |
| } |
| |
| static void snd_data_handler(void *userdata, const XML_Char *s, int len) |
| { |
| struct xml_userdata *data = (struct xml_userdata *)userdata; |
| |
| if (len + data->offs >= sizeof(data->data_buf) ) { |
| data->offs += len; |
| /* string length overflow, return */ |
| return; |
| } else { |
| memcpy(data->data_buf + data->offs, s, len); |
| data->offs += len; |
| } |
| } |
| |
| static void snd_dev_def_init(struct xml_userdata *data, const XML_Char *tag_name, enum snd_node_type node_type) |
| { |
| struct snd_dev_def *dev_def = NULL; |
| struct snd_dev_def_card *card_def = NULL; |
| struct listnode *devs_list; |
| |
| card_def = data->cur_card_def; |
| if (!card_def) |
| return; |
| |
| if (node_type == SND_NODE_TYPE_PCM) |
| devs_list = &card_def->pcm_devs_list; |
| else if (node_type == SND_NODE_TYPE_COMPR) |
| devs_list = &card_def->compr_devs_list; |
| else if (node_type == SND_NODE_TYPE_MIXER) |
| devs_list = &card_def->mixer_devs_list; |
| else |
| return; |
| |
| if (!(!strcmp(tag_name, "pcm-device") | !strcmp(tag_name, "compress-device") | !strcmp(tag_name, "mixer"))) |
| return; |
| |
| dev_def = calloc(1, sizeof(struct snd_dev_def)); |
| if (!dev_def) |
| return; |
| |
| dev_def->node_type = node_type; |
| dev_def->card = card_def; |
| dev_def->type = SND_NODE_DEV_TYPE_HW; |
| list_init(&dev_def->prop_val_list); |
| list_add_tail(devs_list, &dev_def->list_node); |
| data->cur_dev_def = dev_def; |
| } |
| |
| static struct snd_dev_def_card *snd_parse_initialize_card_def(struct xml_userdata *data) |
| { |
| struct snd_dev_def_card *card_def = NULL; |
| |
| if (data->cur_card_def) |
| return data->cur_card_def; |
| |
| card_def = calloc(1, sizeof(struct snd_dev_def_card)); |
| if (!card_def) |
| return card_def; |
| |
| data->card_found = true; |
| data->cur_card_def = card_def; |
| list_init(&card_def->pcm_devs_list); |
| list_init(&card_def->mixer_devs_list); |
| list_init(&card_def->compr_devs_list); |
| return card_def; |
| } |
| |
| static void snd_parse_card_properties(struct xml_userdata *data, const XML_Char *tag_name) |
| { |
| struct snd_dev_def_card *card_def = NULL; |
| unsigned int card; |
| const char s[4] = ", "; |
| char *token = NULL; |
| char *tok_ptr; |
| |
| if (!strcmp(tag_name, "id")) { |
| card = atoi(data->data_buf); |
| if (card == data->card) { |
| card_def = snd_parse_initialize_card_def(data); |
| if (card_def) |
| card_def->card = card; |
| } |
| } else if (!strcmp(tag_name, "name")) { |
| card_def = data->cur_card_def; |
| if (!card_def) { |
| if (!data->card_name) |
| return; |
| token = strtok_r(data->data_buf, s, &tok_ptr); |
| |
| while (token != 0) { |
| if (!strncmp(data->card_name, token, strlen(data->card_name))) { |
| card_def = snd_parse_initialize_card_def(data); |
| if (!card_def) |
| return; |
| goto card_found; |
| } |
| |
| token = strtok_r(0, s, &tok_ptr); |
| } |
| return; |
| } |
| |
| card_found: |
| if (token) |
| strlcpy(data->data_buf, token, strlen(token) + 1); |
| |
| card_def->name = calloc(1, strlen(data->data_buf) + 1); |
| if (!card_def->name) |
| return; |
| |
| strlcpy(card_def->name, data->data_buf, strlen(data->data_buf) + 1); |
| } |
| } |
| |
| static void snd_parse_plugin_properties(struct xml_userdata *data, const XML_Char *tag_name) |
| { |
| struct snd_dev_def *dev_def = NULL; |
| |
| dev_def = data->cur_dev_def; |
| if (!dev_def) |
| return; |
| |
| if (!strcmp(tag_name, "so-name")) { |
| dev_def->so_name = calloc(1, strlen(data->data_buf) + 1); |
| if (!dev_def->so_name) |
| return; |
| |
| strlcpy(dev_def->so_name, data->data_buf, strlen(data->data_buf) + 1); |
| } |
| } |
| |
| static void snd_parse_device_properties(struct xml_userdata *data, const XML_Char *tag_name) |
| { |
| struct snd_dev_def *dev_def = NULL; |
| |
| if (!strcmp(tag_name, "pcm-device") || !strcmp(tag_name, "compress-device") || !strcmp(tag_name, "mixer")) |
| return; |
| |
| dev_def = data->cur_dev_def; |
| if (!dev_def) |
| return; |
| |
| if (!strcmp(tag_name, "id")) { |
| dev_def->device = atoi(data->data_buf); |
| } else if (!strcmp(tag_name, "name")) { |
| dev_def->name = calloc(1, strlen(data->data_buf) + 1); |
| if (!dev_def->name) |
| return; |
| |
| strlcpy(dev_def->name, data->data_buf, strlen(data->data_buf) + 1); |
| } |
| } |
| |
| static void snd_parse_device_custom_properties(struct xml_userdata *data, const XML_Char *tag_name) |
| { |
| struct snd_dev_def *dev_def = NULL; |
| struct snd_prop_val_pair *pv_pair = NULL; |
| |
| if (!strcmp(tag_name, "props")) |
| return; |
| |
| dev_def = data->cur_dev_def; |
| if (!dev_def) |
| return; |
| |
| /* parse custom properties */ |
| if (!strlen(data->data_buf) || !strlen(tag_name)) |
| return; |
| |
| pv_pair = calloc(1, sizeof(struct snd_prop_val_pair)); |
| if (!pv_pair) |
| return; |
| |
| pv_pair->prop = calloc(1, strlen(tag_name) + 1); |
| if (!pv_pair->prop) { |
| free(pv_pair); |
| return; |
| } |
| strlcpy(pv_pair->prop, tag_name, strlen(tag_name) + 1); |
| pv_pair->val = calloc(1, strlen(data->data_buf) + 1); |
| if (!pv_pair->val) { |
| free(pv_pair->prop); |
| free(pv_pair); |
| return; |
| } |
| strlcpy(pv_pair->val, data->data_buf, strlen(data->data_buf) + 1); |
| list_add_tail(&dev_def->prop_val_list, &pv_pair->list_node); |
| } |
| |
| static void snd_process_data_buf (struct xml_userdata *data, const XML_Char *tag_name) |
| { |
| if (data->offs <= 0) |
| return; |
| |
| data->data_buf[data->offs] = '\0'; |
| |
| if (data->card_parsed) |
| return; |
| |
| if (data->current_tag == TAG_ROOT) |
| return; |
| |
| if (data->current_tag == TAG_CARD) |
| snd_parse_card_properties(data, tag_name); |
| else if (data->current_tag == TAG_PLUGIN) |
| snd_parse_plugin_properties(data, tag_name); |
| else if (data->current_tag == TAG_DEVICE) |
| snd_parse_device_properties(data, tag_name); |
| else |
| snd_parse_device_custom_properties(data, tag_name); |
| } |
| |
| static void snd_free_card_devs_def(struct listnode *dev_list) |
| { |
| struct snd_dev_def *dev_def = NULL; |
| struct snd_prop_val_pair *pv_pair; |
| struct listnode *pv_pair_node, *dev_node, *temp, *temp2; |
| |
| list_for_each_safe(dev_node, temp, dev_list) { |
| dev_def = node_to_item(dev_node, struct snd_dev_def, list_node); |
| list_remove(dev_node); |
| free(dev_def->name); |
| free(dev_def->so_name); |
| list_for_each_safe(pv_pair_node, temp2, &dev_def->prop_val_list) { |
| pv_pair = node_to_item(pv_pair_node, struct snd_prop_val_pair, list_node); |
| |
| list_remove(pv_pair_node); |
| free(pv_pair->prop); |
| free(pv_pair->val); |
| free(pv_pair); |
| } |
| free(dev_def); |
| } |
| } |
| |
| static void snd_free_card_def(struct snd_dev_def_card *card_def) |
| { |
| struct listnode *dev_list; |
| |
| if (!card_def) |
| return; |
| |
| dev_list = &card_def->pcm_devs_list; |
| snd_free_card_devs_def(dev_list); |
| |
| dev_list = &card_def->compr_devs_list; |
| snd_free_card_devs_def(dev_list); |
| |
| dev_list = &card_def->mixer_devs_list; |
| snd_free_card_devs_def(dev_list); |
| |
| free(card_def->name); |
| |
| free(card_def); |
| } |
| |
| void *snd_card_def_get_card(unsigned int card) |
| { |
| FILE *file; |
| XML_Parser parser; |
| void *buf; |
| int bytes_read, len = 0; |
| char *snd_card_name = NULL; |
| bool card_found = false; |
| struct listnode *snd_card_node, *temp; |
| struct xml_userdata card_data; |
| struct snd_dev_def_card *card_def = NULL; |
| char filename[MAX_PATH]; |
| |
| snprintf(filename, MAX_PATH, "/proc/asound/card%d/id", card); |
| if (access(filename, F_OK ) != -1 ) { |
| file = fopen(filename, "r"); |
| if (file < 0) { |
| printf("open %s: failed\n", filename); |
| } else { |
| snd_card_name = calloc(1, BUF_SIZE); |
| if (!snd_card_name) |
| return NULL; |
| |
| if (fgets(snd_card_name, BUF_SIZE - 1, file)) { |
| len = strlen(snd_card_name); |
| snd_card_name[len - 1] = '\0'; |
| card = UINT_MAX; |
| } else { |
| free(snd_card_name); |
| snd_card_name = NULL; |
| } |
| fclose(file); |
| } |
| } |
| file = NULL; |
| pthread_rwlock_wrlock(&snd_rwlock); |
| if (snd_card_list_init == false) { |
| list_init(&snd_card_list); |
| snd_card_list_init = true; |
| } |
| memset(&card_data, 0, sizeof(card_data)); |
| |
| list_for_each_safe(snd_card_node, temp, &snd_card_list) { |
| card_def = node_to_item(snd_card_node, struct snd_dev_def_card, list_node); |
| if (snd_card_name) { |
| if (!strncmp(snd_card_name, card_def->name, strlen(snd_card_name))) |
| card_found = true; |
| } else if (card_def->card == card) { |
| card_found = true; |
| } |
| if (card_found) { |
| card_def->refcnt++; |
| pthread_rwlock_unlock(&snd_rwlock); |
| free(snd_card_name); |
| return card_def; |
| } |
| } |
| |
| /* read XML */ |
| file = fopen(CARD_DEF_FILE, "r"); |
| if (!file) { |
| pthread_rwlock_unlock(&snd_rwlock); |
| free(snd_card_name); |
| return NULL; |
| } |
| |
| parser = XML_ParserCreate(NULL); |
| if (!parser) { |
| fclose(file); |
| pthread_rwlock_unlock(&snd_rwlock); |
| free(snd_card_name); |
| return NULL; |
| } |
| |
| card_data.card = card; |
| card_data.card_name = snd_card_name; |
| XML_SetUserData(parser, &card_data); |
| XML_SetElementHandler(parser, snd_start_tag, snd_end_tag); |
| XML_SetCharacterDataHandler(parser, snd_data_handler); |
| |
| /* parse XML */ |
| for (;;) { |
| buf = XML_GetBuffer(parser, BUF_SIZE); |
| if (buf == NULL) |
| goto ret; |
| bytes_read = fread(buf, 1, BUF_SIZE, file); |
| |
| if (bytes_read < 0) |
| goto ret; |
| |
| if (XML_ParseBuffer(parser, bytes_read, |
| bytes_read == 0) == XML_STATUS_ERROR) { |
| goto ret; |
| } |
| |
| if (bytes_read == 0) |
| break; |
| } |
| |
| card_def = card_data.cur_card_def; |
| if (card_def) { |
| list_add_tail(&snd_card_list, &card_def->list_node); |
| card_def->refcnt++; |
| } |
| ret: |
| free(snd_card_name); |
| card_data.card_name = NULL; |
| XML_ParserFree(parser); |
| fclose(file); |
| pthread_rwlock_unlock(&snd_rwlock); |
| return card_def; |
| } |
| |
| void snd_card_def_put_card(void *card_node) |
| { |
| struct snd_dev_def_card *defs = (struct snd_dev_def_card *)card_node; |
| struct snd_dev_def_card *card_def = NULL; |
| struct listnode *snd_card_node, *temp; |
| |
| if (!defs) |
| return; |
| |
| pthread_rwlock_wrlock(&snd_rwlock); |
| list_for_each_safe(snd_card_node, temp, &snd_card_list) { |
| card_def = node_to_item(snd_card_node, struct snd_dev_def_card, list_node); |
| if (card_def == defs) { |
| card_def->refcnt--; |
| if (!card_def->refcnt) { |
| list_remove(snd_card_node); |
| snd_free_card_def(card_def); |
| } |
| } |
| } |
| pthread_rwlock_unlock(&snd_rwlock); |
| } |
| |
| void *snd_card_def_get_node(void *card_node, unsigned int id, enum snd_node_type type) |
| { |
| struct snd_dev_def_card *card_def = (struct snd_dev_def_card *)card_node; |
| struct snd_dev_def *dev_def = NULL; |
| struct listnode *dev_node, *temp, *devs_list; |
| |
| if (!card_def) |
| return NULL; |
| |
| if (type >= SND_NODE_TYPE_MAX) |
| return NULL; |
| |
| pthread_rwlock_rdlock(&snd_rwlock); |
| if (type == SND_NODE_TYPE_PCM) |
| devs_list = &card_def->pcm_devs_list; |
| else if (type == SND_NODE_TYPE_COMPR) |
| devs_list = &card_def->compr_devs_list; |
| else |
| devs_list = &card_def->mixer_devs_list; |
| |
| list_for_each_safe(dev_node, temp, devs_list) { |
| dev_def = node_to_item(dev_node, struct snd_dev_def, list_node); |
| if (dev_def->device == id) { |
| pthread_rwlock_unlock(&snd_rwlock); |
| return dev_def; |
| } |
| } |
| |
| pthread_rwlock_unlock(&snd_rwlock); |
| return NULL; |
| } |
| |
| int snd_card_def_get_num_node(void *card_node, enum snd_node_type type) |
| { |
| struct snd_dev_def_card *card_def = (struct snd_dev_def_card *)card_node; |
| struct listnode *temp, *dev_node, *devs_list; |
| int num_devs = 0; |
| |
| if (!card_def) |
| return 0; |
| |
| if (type >= SND_NODE_TYPE_MAX) |
| return 0; |
| |
| pthread_rwlock_rdlock(&snd_rwlock); |
| if (type == SND_NODE_TYPE_PCM) |
| devs_list = &card_def->pcm_devs_list; |
| else if (type == SND_NODE_TYPE_COMPR) |
| devs_list = &card_def->compr_devs_list; |
| else |
| devs_list = &card_def->mixer_devs_list; |
| |
| list_for_each_safe(dev_node, temp, devs_list) |
| num_devs++; |
| |
| pthread_rwlock_unlock(&snd_rwlock); |
| return num_devs; |
| } |
| |
| int snd_card_def_get_nodes_for_type(void *card_node, enum snd_node_type type, |
| void **list, int num_nodes) |
| { |
| struct snd_dev_def_card *card_def = (struct snd_dev_def_card *)card_node; |
| struct snd_dev_def *dev_def; |
| struct listnode *temp, *dev_node, *devs_list; |
| int num_devs = 0, i = 0; |
| |
| if (!card_def) |
| return -EINVAL; |
| |
| if (type >= SND_NODE_TYPE_MAX) |
| return -EINVAL; |
| |
| pthread_rwlock_rdlock(&snd_rwlock); |
| if (type == SND_NODE_TYPE_PCM) |
| devs_list = &card_def->pcm_devs_list; |
| else if (type == SND_NODE_TYPE_COMPR) |
| devs_list = &card_def->compr_devs_list; |
| else |
| devs_list = &card_def->mixer_devs_list; |
| |
| list_for_each_safe(dev_node, temp, devs_list) |
| num_devs++; |
| |
| if (num_nodes > num_devs) |
| return -EINVAL; |
| |
| list_for_each_safe(dev_node, temp, devs_list) { |
| dev_def = node_to_item(dev_node, struct snd_dev_def, list_node); |
| list[i++] = dev_def; |
| if (i == num_nodes) |
| break; |
| } |
| |
| pthread_rwlock_unlock(&snd_rwlock); |
| return 0; |
| } |
| |
| int snd_card_def_get_int(void *node, const char *prop, int *val) |
| { |
| struct snd_dev_def *dev_def = (struct snd_dev_def *)node; |
| struct snd_prop_val_pair *pv_pair; |
| struct listnode *pv_pair_node, *temp; |
| int ret = -EINVAL; |
| |
| if (!dev_def) |
| return ret; |
| |
| pthread_rwlock_rdlock(&snd_rwlock); |
| if (!strcmp(prop, "type")) { |
| *val = dev_def->type; |
| pthread_rwlock_unlock(&snd_rwlock); |
| return 0; |
| } else if (!strcmp(prop, "id")) { |
| *val = dev_def->device; |
| pthread_rwlock_unlock(&snd_rwlock); |
| return 0; |
| } |
| |
| list_for_each_safe(pv_pair_node, temp, &dev_def->prop_val_list) { |
| pv_pair = node_to_item(pv_pair_node, struct snd_prop_val_pair, list_node); |
| if (!strcmp(pv_pair->prop, prop)) { |
| *val = atoi(pv_pair->val); |
| pthread_rwlock_unlock(&snd_rwlock); |
| return 0; |
| } |
| } |
| |
| pthread_rwlock_unlock(&snd_rwlock); |
| return ret; |
| } |
| |
| int snd_card_def_get_str(void *node, const char *prop, char **val) |
| { |
| struct snd_dev_def *dev_def = (struct snd_dev_def *)node; |
| struct snd_prop_val_pair *pv_pair; |
| struct listnode *pv_pair_node, *temp; |
| int ret = -EINVAL; |
| |
| if (!dev_def) |
| return ret; |
| |
| pthread_rwlock_rdlock(&snd_rwlock); |
| if (!strcmp(prop, "so-name")) { |
| if (dev_def->so_name) |
| *val = dev_def->so_name; |
| |
| pthread_rwlock_unlock(&snd_rwlock); |
| return 0; |
| } |
| |
| if (!strcmp(prop, "name")) { |
| if (dev_def->name) |
| *val = dev_def->name; |
| |
| pthread_rwlock_unlock(&snd_rwlock); |
| return 0; |
| } |
| |
| list_for_each_safe(pv_pair_node, temp, &dev_def->prop_val_list) { |
| pv_pair = node_to_item(pv_pair_node, struct snd_prop_val_pair, list_node); |
| |
| if (!strcmp(pv_pair->prop, prop)) { |
| *val = pv_pair->val; |
| pthread_rwlock_unlock(&snd_rwlock); |
| return 0; |
| } |
| } |
| |
| pthread_rwlock_unlock(&snd_rwlock); |
| return ret; |
| } |