client/stt_client.c

   1 /*
   2 *  Copyright (c) 2011-2014 Samsung Electronics Co., Ltd All Rights Reserved
   3 *  Licensed under the Apache License, Version 2.0 (the "License");
   4 *  you may not use this file except in compliance with the License.
   5 *  You may obtain a copy of the License at
   6 *  http://www.apache.org/licenses/LICENSE-2.0
   7 *  Unless required by applicable law or agreed to in writing, software
   8 *  distributed under the License is distributed on an "AS IS" BASIS,
   9 *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  10 *  See the License for the specific language governing permissions and
  11 *  limitations under the License.
  12 */
  13
  14
  15 #include "stt_client.h"
  16
  17 #define MUTEX_TIME 3
  18
  19 /* Max number of handle */
  20 static const int g_max_handle = 999;
  21 /* allocated handle */
  22 static int g_allocated_handle = 0;
  23 /* client list */
  24 static GList *g_client_list = NULL;
  25
  26
  27 /* private functions */
  28 static int __client_generate_uid(int pid)
  29 {
  30         g_allocated_handle++;
  31
  32         if (g_allocated_handle > g_max_handle) {
  33                 g_allocated_handle = 1;
  34         }
  35
  36         /* generate uid, handle number should be smaller than 1000 */
  37         return pid * 1000 + g_allocated_handle;
  38 }
  39
  40 int stt_client_new(stt_h* stt)
  41 {
  42         stt_client_s *client = NULL;
  43
  44         client = (stt_client_s*)calloc(1, sizeof(stt_client_s));
  45         if (NULL == client) {
  46                 SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Fail to allocate memory");
  47                 return STT_ERROR_OUT_OF_MEMORY;
  48         }
  49
  50         stt_h temp = (stt_h)calloc(1, sizeof(struct stt_s));
  51         if (NULL == temp) {
  52                 SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Fail to allocate memory");
  53                 free(client);
  54                 return STT_ERROR_OUT_OF_MEMORY;
  55         }
  56         temp->handle = __client_generate_uid(getpid());
  57
  58         /* initialize client data */
  59         client->stt = temp;
  60         client->pid = getpid();
  61         client->uid = temp->handle;
  62
  63         client->recognition_result_cb = NULL;
  64         client->recognition_result_user_data = NULL;
  65         client->state_changed_cb = NULL;
  66         client->state_changed_user_data = NULL;
  67         client->error_cb = NULL;
  68         client->error_user_data = NULL;
  69         client->default_lang_changed_cb = NULL;
  70         client->default_lang_changed_user_data = NULL;
  71
  72         client->current_engine_id = NULL;
  73
  74         client->silence_supported = false;
  75         client->silence = STT_OPTION_SILENCE_DETECTION_AUTO;
  76
  77         client->event = 0;
  78         client->data_list = NULL;
  79         client->data_count = 0;
  80         client->msg = NULL;
  81
  82         client->reason = 0;
  83         client->err_msg = NULL;
  84
  85         client->before_state = STT_STATE_CREATED;
  86         client->current_state = STT_STATE_CREATED;
  87
  88         client->internal_state = STT_INTERNAL_STATE_NONE;
  89
  90         client->cb_ref_count = 0;
  91
  92         g_client_list = g_list_append(g_client_list, client);
  93
  94         *stt = temp;
  95
  96         return 0;
  97 }
  98
  99 int stt_client_destroy(stt_h stt)
 100 {
 101         if (stt == NULL) {
 102                 SLOG(LOG_ERROR, TAG_STTC, "Input parameter is NULL");
 103                 return 0;
 104         }
 105
 106         GList *iter = NULL;
 107         stt_client_s *data = NULL;
 108
 109         /* if list have item */
 110         if (g_list_length(g_client_list) > 0) {
 111                 /* Get a first item */
 112                 iter = g_list_first(g_client_list);
 113
 114                 while (NULL != iter) {
 115                         data = iter->data;
 116                         if (stt->handle == data->stt->handle) {
 117                                 g_client_list = g_list_remove_link(g_client_list, iter);
 118
 119                                 while (0 != data->cb_ref_count) {
 120                                         /* wait for release callback function */
 121                                 }
 122
 123                                 if (NULL != data->current_engine_id) {
 124                                         free(data->current_engine_id);
 125                                 }
 126
 127                                 if (NULL != data->err_msg) {
 128                                         free(data->err_msg);
 129                                 }
 130
 131                                 free(data);
 132                                 free(stt);
 133
 134                                 return 0;
 135                         }
 136
 137                         /* Next item */
 138                         iter = g_list_next(iter);
 139                 }
 140         }
 141
 142         SLOG(LOG_ERROR, TAG_STTC, "[ERROR] client Not founded");
 143
 144         return -1;
 145 }
 146
 147
 148 stt_client_s* stt_client_get(stt_h stt)
 149 {
 150         if (NULL == stt) {
 151                 SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Input parameter is NULL");
 152                 return NULL;
 153         }
 154
 155         GList *iter = NULL;
 156         stt_client_s *data = NULL;
 157
 158         if (g_list_length(g_client_list) > 0) {
 159                 /* Get a first item */
 160                 iter = g_list_first(g_client_list);
 161
 162                 while (NULL != iter) {
 163                         data = iter->data;
 164                         if (NULL != data) {
 165                                 if (stt->handle == data->stt->handle)
 166                                         return data;
 167                         }
 168                         /* Next item */
 169                         iter = g_list_next(iter);
 170                 }
 171         }
 172
 173         SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Fail to get client by stt");
 174
 175         return NULL;
 176 }
 177
 178 stt_client_s* stt_client_get_by_uid(const int uid)
 179 {
 180         if (uid < 0) {
 181                 SLOG(LOG_ERROR, TAG_STTC, "[ERROR] out of range : handle");
 182                 return NULL;
 183         }
 184
 185         GList *iter = NULL;
 186         stt_client_s *data = NULL;
 187
 188         if (g_list_length(g_client_list) > 0) {
 189                 /* Get a first item */
 190                 iter = g_list_first(g_client_list);
 191
 192                 while (NULL != iter) {
 193                         data = iter->data;
 194                         if (uid == data->uid) {
 195                                 return data;
 196                         }
 197
 198                         /* Next item */
 199                         iter = g_list_next(iter);
 200                 }
 201         }
 202
 203         SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Fail to get client by uid");
 204
 205         return NULL;
 206 }
 207
 208 int stt_client_get_size()
 209 {
 210         return g_list_length(g_client_list);
 211 }
 212
 213 int stt_client_use_callback(stt_client_s* client)
 214 {
 215         client->cb_ref_count++;
 216         return 0;
 217 }
 218
 219 int stt_client_not_use_callback(stt_client_s* client)
 220 {
 221         client->cb_ref_count--;
 222         return 0;
 223 }
 224
 225 int stt_client_get_use_callback(stt_client_s* client)
 226 {
 227         return client->cb_ref_count;
 228 }
 229
 230 GList* stt_client_get_client_list()
 231 {
 232         return g_client_list;
 233 }