| /* $Id: audiotest.c 3553 2011-05-05 06:14:19Z nanang $ */ |
| /* |
| * Copyright (C) 2008-2011 Teluu Inc. (http://www.teluu.com) |
| * Copyright (C) 2003-2008 Benny Prijono <benny@prijono.org> |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or |
| * (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pjmedia-audiodev/audiotest.h> |
| #include <pjmedia-audiodev/audiodev.h> |
| #include <pjlib.h> |
| #include <pjlib-util.h> |
| |
| #define THIS_FILE "audiotest.c" |
| |
| /* Test duration in msec */ |
| #define DURATION 10000 |
| |
| /* Skip the first msec from the calculation */ |
| #define SKIP_DURATION 1000 |
| |
| /* Division helper */ |
| #define DIV_ROUND_UP(a,b) (((a) + ((b) - 1)) / (b)) |
| #define DIV_ROUND(a,b) (((a) + ((b)/2 - 1)) / (b)) |
| |
| struct stream_data |
| { |
| pj_uint32_t first_timestamp; |
| pj_uint32_t last_timestamp; |
| pj_timestamp last_called; |
| pj_math_stat delay; |
| }; |
| |
| struct test_data |
| { |
| pj_pool_t *pool; |
| const pjmedia_aud_param *param; |
| pjmedia_aud_test_results *result; |
| pj_bool_t running; |
| pj_bool_t has_error; |
| pj_mutex_t *mutex; |
| |
| struct stream_data capture_data; |
| struct stream_data playback_data; |
| }; |
| |
| static pj_status_t play_cb(void *user_data, pjmedia_frame *frame) |
| { |
| struct test_data *test_data = (struct test_data *)user_data; |
| struct stream_data *strm_data = &test_data->playback_data; |
| |
| pj_mutex_lock(test_data->mutex); |
| |
| /* Skip frames when test is not started or test has finished */ |
| if (!test_data->running) { |
| pj_bzero(frame->buf, frame->size); |
| pj_mutex_unlock(test_data->mutex); |
| return PJ_SUCCESS; |
| } |
| |
| /* Save last timestamp seen (to calculate drift) */ |
| strm_data->last_timestamp = frame->timestamp.u32.lo; |
| |
| if (strm_data->last_called.u64 == 0) { |
| /* Init vars. */ |
| pj_get_timestamp(&strm_data->last_called); |
| pj_math_stat_init(&strm_data->delay); |
| strm_data->first_timestamp = frame->timestamp.u32.lo; |
| } else { |
| pj_timestamp now; |
| unsigned delay; |
| |
| /* Calculate frame interval */ |
| pj_get_timestamp(&now); |
| delay = pj_elapsed_usec(&strm_data->last_called, &now); |
| strm_data->last_called = now; |
| |
| /* Update frame interval statistic */ |
| pj_math_stat_update(&strm_data->delay, delay); |
| } |
| |
| pj_bzero(frame->buf, frame->size); |
| |
| pj_mutex_unlock(test_data->mutex); |
| |
| return PJ_SUCCESS; |
| } |
| |
| static pj_status_t rec_cb(void *user_data, pjmedia_frame *frame) |
| { |
| struct test_data *test_data = (struct test_data*)user_data; |
| struct stream_data *strm_data = &test_data->capture_data; |
| |
| pj_mutex_lock(test_data->mutex); |
| |
| /* Skip frames when test is not started or test has finished */ |
| if (!test_data->running) { |
| pj_mutex_unlock(test_data->mutex); |
| return PJ_SUCCESS; |
| } |
| |
| /* Save last timestamp seen (to calculate drift) */ |
| strm_data->last_timestamp = frame->timestamp.u32.lo; |
| |
| if (strm_data->last_called.u64 == 0) { |
| /* Init vars. */ |
| pj_get_timestamp(&strm_data->last_called); |
| pj_math_stat_init(&strm_data->delay); |
| strm_data->first_timestamp = frame->timestamp.u32.lo; |
| } else { |
| pj_timestamp now; |
| unsigned delay; |
| |
| /* Calculate frame interval */ |
| pj_get_timestamp(&now); |
| delay = pj_elapsed_usec(&strm_data->last_called, &now); |
| strm_data->last_called = now; |
| |
| /* Update frame interval statistic */ |
| pj_math_stat_update(&strm_data->delay, delay); |
| } |
| |
| pj_mutex_unlock(test_data->mutex); |
| return PJ_SUCCESS; |
| } |
| |
| static void app_perror(const char *title, pj_status_t status) |
| { |
| char errmsg[PJ_ERR_MSG_SIZE]; |
| |
| pj_strerror(status, errmsg, sizeof(errmsg)); |
| printf( "%s: %s (err=%d)\n", |
| title, errmsg, status); |
| } |
| |
| |
| PJ_DEF(pj_status_t) pjmedia_aud_test( const pjmedia_aud_param *param, |
| pjmedia_aud_test_results *result) |
| { |
| pj_status_t status = PJ_SUCCESS; |
| pjmedia_aud_stream *strm; |
| struct test_data test_data; |
| unsigned ptime, tmp; |
| |
| /* |
| * Init test parameters |
| */ |
| pj_bzero(&test_data, sizeof(test_data)); |
| test_data.param = param; |
| test_data.result = result; |
| |
| test_data.pool = pj_pool_create(pjmedia_aud_subsys_get_pool_factory(), |
| "audtest", 1000, 1000, NULL); |
| pj_mutex_create_simple(test_data.pool, "sndtest", &test_data.mutex); |
| |
| /* |
| * Open device. |
| */ |
| status = pjmedia_aud_stream_create(test_data.param, &rec_cb, &play_cb, |
| &test_data, &strm); |
| if (status != PJ_SUCCESS) { |
| app_perror("Unable to open device", status); |
| pj_pool_release(test_data.pool); |
| return status; |
| } |
| |
| |
| /* Sleep for a while to let sound device "settles" */ |
| pj_thread_sleep(200); |
| |
| /* |
| * Start the stream. |
| */ |
| status = pjmedia_aud_stream_start(strm); |
| if (status != PJ_SUCCESS) { |
| app_perror("Unable to start capture stream", status); |
| pjmedia_aud_stream_destroy(strm); |
| pj_pool_release(test_data.pool); |
| return status; |
| } |
| |
| PJ_LOG(3,(THIS_FILE, |
| " Please wait while test is in progress (~%d secs)..", |
| (DURATION+SKIP_DURATION)/1000)); |
| |
| /* Let the stream runs for few msec/sec to get stable result. |
| * (capture normally begins with frames available simultaneously). |
| */ |
| pj_thread_sleep(SKIP_DURATION); |
| |
| |
| /* Begin gather data */ |
| test_data.running = 1; |
| |
| /* |
| * Let the test runs for a while. |
| */ |
| pj_thread_sleep(DURATION); |
| |
| |
| /* |
| * Close stream. |
| */ |
| test_data.running = 0; |
| pjmedia_aud_stream_destroy(strm); |
| pj_pool_release(test_data.pool); |
| |
| |
| /* |
| * Gather results |
| */ |
| ptime = param->samples_per_frame * 1000 / param->clock_rate; |
| |
| tmp = pj_math_stat_get_stddev(&test_data.capture_data.delay); |
| result->rec.frame_cnt = test_data.capture_data.delay.n; |
| result->rec.min_interval = DIV_ROUND(test_data.capture_data.delay.min, 1000); |
| result->rec.max_interval = DIV_ROUND(test_data.capture_data.delay.max, 1000); |
| result->rec.avg_interval = DIV_ROUND(test_data.capture_data.delay.mean, 1000); |
| result->rec.dev_interval = DIV_ROUND(tmp, 1000); |
| result->rec.max_burst = DIV_ROUND_UP(result->rec.max_interval, ptime); |
| |
| tmp = pj_math_stat_get_stddev(&test_data.playback_data.delay); |
| result->play.frame_cnt = test_data.playback_data.delay.n; |
| result->play.min_interval = DIV_ROUND(test_data.playback_data.delay.min, 1000); |
| result->play.max_interval = DIV_ROUND(test_data.playback_data.delay.max, 1000); |
| result->play.avg_interval = DIV_ROUND(test_data.playback_data.delay.mean, 1000); |
| result->play.dev_interval = DIV_ROUND(tmp, 1000); |
| result->play.max_burst = DIV_ROUND_UP(result->play.max_interval, ptime); |
| |
| /* Check drifting */ |
| if (param->dir == PJMEDIA_DIR_CAPTURE_PLAYBACK) { |
| int play_diff, cap_diff, drift; |
| |
| play_diff = test_data.playback_data.last_timestamp - |
| test_data.playback_data.first_timestamp; |
| cap_diff = test_data.capture_data.last_timestamp - |
| test_data.capture_data.first_timestamp; |
| drift = play_diff > cap_diff? play_diff - cap_diff : |
| cap_diff - play_diff; |
| |
| /* Allow one frame tolerance for clock drift detection */ |
| if (drift < (int)param->samples_per_frame) { |
| result->rec_drift_per_sec = 0; |
| } else { |
| unsigned msec_dur; |
| |
| msec_dur = (test_data.capture_data.last_timestamp - |
| test_data.capture_data.first_timestamp) * 1000 / |
| test_data.param->clock_rate; |
| |
| result->rec_drift_per_sec = drift * 1000 / msec_dur; |
| |
| } |
| } |
| |
| return test_data.has_error? PJ_EUNKNOWN : PJ_SUCCESS; |
| } |
| |