Tristan Matthews | 0a329cc | 2013-07-17 13:20:14 -0400 | [diff] [blame] | 1 | /* $Id: audiotest.c 3553 2011-05-05 06:14:19Z nanang $ */ |
| 2 | /* |
| 3 | * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| 4 | * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | */ |
| 20 | #include <pjmedia-audiodev/audiotest.h> |
| 21 | #include <pjmedia-audiodev/audiodev.h> |
| 22 | #include <pjlib.h> |
| 23 | #include <pjlib-util.h> |
| 24 | |
| 25 | #define THIS_FILE "audiotest.c" |
| 26 | |
| 27 | /* Test duration in msec */ |
| 28 | #define DURATION 10000 |
| 29 | |
| 30 | /* Skip the first msec from the calculation */ |
| 31 | #define SKIP_DURATION 1000 |
| 32 | |
| 33 | /* Division helper */ |
| 34 | #define DIV_ROUND_UP(a,b) (((a) + ((b) - 1)) / (b)) |
| 35 | #define DIV_ROUND(a,b) (((a) + ((b)/2 - 1)) / (b)) |
| 36 | |
| 37 | struct stream_data |
| 38 | { |
| 39 | pj_uint32_t first_timestamp; |
| 40 | pj_uint32_t last_timestamp; |
| 41 | pj_timestamp last_called; |
| 42 | pj_math_stat delay; |
| 43 | }; |
| 44 | |
| 45 | struct test_data |
| 46 | { |
| 47 | pj_pool_t *pool; |
| 48 | const pjmedia_aud_param *param; |
| 49 | pjmedia_aud_test_results *result; |
| 50 | pj_bool_t running; |
| 51 | pj_bool_t has_error; |
| 52 | pj_mutex_t *mutex; |
| 53 | |
| 54 | struct stream_data capture_data; |
| 55 | struct stream_data playback_data; |
| 56 | }; |
| 57 | |
| 58 | static pj_status_t play_cb(void *user_data, pjmedia_frame *frame) |
| 59 | { |
| 60 | struct test_data *test_data = (struct test_data *)user_data; |
| 61 | struct stream_data *strm_data = &test_data->playback_data; |
| 62 | |
| 63 | pj_mutex_lock(test_data->mutex); |
| 64 | |
| 65 | /* Skip frames when test is not started or test has finished */ |
| 66 | if (!test_data->running) { |
| 67 | pj_bzero(frame->buf, frame->size); |
| 68 | pj_mutex_unlock(test_data->mutex); |
| 69 | return PJ_SUCCESS; |
| 70 | } |
| 71 | |
| 72 | /* Save last timestamp seen (to calculate drift) */ |
| 73 | strm_data->last_timestamp = frame->timestamp.u32.lo; |
| 74 | |
| 75 | if (strm_data->last_called.u64 == 0) { |
| 76 | /* Init vars. */ |
| 77 | pj_get_timestamp(&strm_data->last_called); |
| 78 | pj_math_stat_init(&strm_data->delay); |
| 79 | strm_data->first_timestamp = frame->timestamp.u32.lo; |
| 80 | } else { |
| 81 | pj_timestamp now; |
| 82 | unsigned delay; |
| 83 | |
| 84 | /* Calculate frame interval */ |
| 85 | pj_get_timestamp(&now); |
| 86 | delay = pj_elapsed_usec(&strm_data->last_called, &now); |
| 87 | strm_data->last_called = now; |
| 88 | |
| 89 | /* Update frame interval statistic */ |
| 90 | pj_math_stat_update(&strm_data->delay, delay); |
| 91 | } |
| 92 | |
| 93 | pj_bzero(frame->buf, frame->size); |
| 94 | |
| 95 | pj_mutex_unlock(test_data->mutex); |
| 96 | |
| 97 | return PJ_SUCCESS; |
| 98 | } |
| 99 | |
| 100 | static pj_status_t rec_cb(void *user_data, pjmedia_frame *frame) |
| 101 | { |
| 102 | struct test_data *test_data = (struct test_data*)user_data; |
| 103 | struct stream_data *strm_data = &test_data->capture_data; |
| 104 | |
| 105 | pj_mutex_lock(test_data->mutex); |
| 106 | |
| 107 | /* Skip frames when test is not started or test has finished */ |
| 108 | if (!test_data->running) { |
| 109 | pj_mutex_unlock(test_data->mutex); |
| 110 | return PJ_SUCCESS; |
| 111 | } |
| 112 | |
| 113 | /* Save last timestamp seen (to calculate drift) */ |
| 114 | strm_data->last_timestamp = frame->timestamp.u32.lo; |
| 115 | |
| 116 | if (strm_data->last_called.u64 == 0) { |
| 117 | /* Init vars. */ |
| 118 | pj_get_timestamp(&strm_data->last_called); |
| 119 | pj_math_stat_init(&strm_data->delay); |
| 120 | strm_data->first_timestamp = frame->timestamp.u32.lo; |
| 121 | } else { |
| 122 | pj_timestamp now; |
| 123 | unsigned delay; |
| 124 | |
| 125 | /* Calculate frame interval */ |
| 126 | pj_get_timestamp(&now); |
| 127 | delay = pj_elapsed_usec(&strm_data->last_called, &now); |
| 128 | strm_data->last_called = now; |
| 129 | |
| 130 | /* Update frame interval statistic */ |
| 131 | pj_math_stat_update(&strm_data->delay, delay); |
| 132 | } |
| 133 | |
| 134 | pj_mutex_unlock(test_data->mutex); |
| 135 | return PJ_SUCCESS; |
| 136 | } |
| 137 | |
| 138 | static void app_perror(const char *title, pj_status_t status) |
| 139 | { |
| 140 | char errmsg[PJ_ERR_MSG_SIZE]; |
| 141 | |
| 142 | pj_strerror(status, errmsg, sizeof(errmsg)); |
| 143 | printf( "%s: %s (err=%d)\n", |
| 144 | title, errmsg, status); |
| 145 | } |
| 146 | |
| 147 | |
| 148 | PJ_DEF(pj_status_t) pjmedia_aud_test( const pjmedia_aud_param *param, |
| 149 | pjmedia_aud_test_results *result) |
| 150 | { |
| 151 | pj_status_t status = PJ_SUCCESS; |
| 152 | pjmedia_aud_stream *strm; |
| 153 | struct test_data test_data; |
| 154 | unsigned ptime, tmp; |
| 155 | |
| 156 | /* |
| 157 | * Init test parameters |
| 158 | */ |
| 159 | pj_bzero(&test_data, sizeof(test_data)); |
| 160 | test_data.param = param; |
| 161 | test_data.result = result; |
| 162 | |
| 163 | test_data.pool = pj_pool_create(pjmedia_aud_subsys_get_pool_factory(), |
| 164 | "audtest", 1000, 1000, NULL); |
| 165 | pj_mutex_create_simple(test_data.pool, "sndtest", &test_data.mutex); |
| 166 | |
| 167 | /* |
| 168 | * Open device. |
| 169 | */ |
| 170 | status = pjmedia_aud_stream_create(test_data.param, &rec_cb, &play_cb, |
| 171 | &test_data, &strm); |
| 172 | if (status != PJ_SUCCESS) { |
| 173 | app_perror("Unable to open device", status); |
| 174 | pj_pool_release(test_data.pool); |
| 175 | return status; |
| 176 | } |
| 177 | |
| 178 | |
| 179 | /* Sleep for a while to let sound device "settles" */ |
| 180 | pj_thread_sleep(200); |
| 181 | |
| 182 | /* |
| 183 | * Start the stream. |
| 184 | */ |
| 185 | status = pjmedia_aud_stream_start(strm); |
| 186 | if (status != PJ_SUCCESS) { |
| 187 | app_perror("Unable to start capture stream", status); |
| 188 | pjmedia_aud_stream_destroy(strm); |
| 189 | pj_pool_release(test_data.pool); |
| 190 | return status; |
| 191 | } |
| 192 | |
| 193 | PJ_LOG(3,(THIS_FILE, |
| 194 | " Please wait while test is in progress (~%d secs)..", |
| 195 | (DURATION+SKIP_DURATION)/1000)); |
| 196 | |
| 197 | /* Let the stream runs for few msec/sec to get stable result. |
| 198 | * (capture normally begins with frames available simultaneously). |
| 199 | */ |
| 200 | pj_thread_sleep(SKIP_DURATION); |
| 201 | |
| 202 | |
| 203 | /* Begin gather data */ |
| 204 | test_data.running = 1; |
| 205 | |
| 206 | /* |
| 207 | * Let the test runs for a while. |
| 208 | */ |
| 209 | pj_thread_sleep(DURATION); |
| 210 | |
| 211 | |
| 212 | /* |
| 213 | * Close stream. |
| 214 | */ |
| 215 | test_data.running = 0; |
| 216 | pjmedia_aud_stream_destroy(strm); |
| 217 | pj_pool_release(test_data.pool); |
| 218 | |
| 219 | |
| 220 | /* |
| 221 | * Gather results |
| 222 | */ |
| 223 | ptime = param->samples_per_frame * 1000 / param->clock_rate; |
| 224 | |
| 225 | tmp = pj_math_stat_get_stddev(&test_data.capture_data.delay); |
| 226 | result->rec.frame_cnt = test_data.capture_data.delay.n; |
| 227 | result->rec.min_interval = DIV_ROUND(test_data.capture_data.delay.min, 1000); |
| 228 | result->rec.max_interval = DIV_ROUND(test_data.capture_data.delay.max, 1000); |
| 229 | result->rec.avg_interval = DIV_ROUND(test_data.capture_data.delay.mean, 1000); |
| 230 | result->rec.dev_interval = DIV_ROUND(tmp, 1000); |
| 231 | result->rec.max_burst = DIV_ROUND_UP(result->rec.max_interval, ptime); |
| 232 | |
| 233 | tmp = pj_math_stat_get_stddev(&test_data.playback_data.delay); |
| 234 | result->play.frame_cnt = test_data.playback_data.delay.n; |
| 235 | result->play.min_interval = DIV_ROUND(test_data.playback_data.delay.min, 1000); |
| 236 | result->play.max_interval = DIV_ROUND(test_data.playback_data.delay.max, 1000); |
| 237 | result->play.avg_interval = DIV_ROUND(test_data.playback_data.delay.mean, 1000); |
| 238 | result->play.dev_interval = DIV_ROUND(tmp, 1000); |
| 239 | result->play.max_burst = DIV_ROUND_UP(result->play.max_interval, ptime); |
| 240 | |
| 241 | /* Check drifting */ |
| 242 | if (param->dir == PJMEDIA_DIR_CAPTURE_PLAYBACK) { |
| 243 | int play_diff, cap_diff, drift; |
| 244 | |
| 245 | play_diff = test_data.playback_data.last_timestamp - |
| 246 | test_data.playback_data.first_timestamp; |
| 247 | cap_diff = test_data.capture_data.last_timestamp - |
| 248 | test_data.capture_data.first_timestamp; |
| 249 | drift = play_diff > cap_diff? play_diff - cap_diff : |
| 250 | cap_diff - play_diff; |
| 251 | |
| 252 | /* Allow one frame tolerance for clock drift detection */ |
| 253 | if (drift < (int)param->samples_per_frame) { |
| 254 | result->rec_drift_per_sec = 0; |
| 255 | } else { |
| 256 | unsigned msec_dur; |
| 257 | |
| 258 | msec_dur = (test_data.capture_data.last_timestamp - |
| 259 | test_data.capture_data.first_timestamp) * 1000 / |
| 260 | test_data.param->clock_rate; |
| 261 | |
| 262 | result->rec_drift_per_sec = drift * 1000 / msec_dur; |
| 263 | |
| 264 | } |
| 265 | } |
| 266 | |
| 267 | return test_data.has_error? PJ_EUNKNOWN : PJ_SUCCESS; |
| 268 | } |
| 269 | |