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[core] Fix switch_vad_process() to properly use result of fvad_process(). Fixes #18

This commit is contained in:
Chris Rienzo 2020-02-28 16:30:01 +00:00 committed by Andrey Volk
parent 59551f0fd0
commit 8e0c0df5b6
3 changed files with 241 additions and 5 deletions
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12
src/switch_vad.c
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@ -1,6 +1,6 @@
/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2018, Anthony Minessale II <anthm@freeswitch.org>
* Copyright (C) 2018-2020, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
@ -24,6 +24,7 @@
* Contributor(s):
*
* Seven Du <dujinfang@gmail.com>
* Chris Rienzo <chris@signalwire.com>
*
*
* switch_vad.c VAD code with optional libfvad
@ -189,11 +190,14 @@ SWITCH_DECLARE(switch_vad_state_t) switch_vad_process(switch_vad_t *vad, int16_t
// determine if this is a voice or non-voice frame
#ifdef SWITCH_HAVE_FVAD
if (vad->fvad) {
// fvad returns -1, 0, or 1
// -1: error
// 0: non-voice frame
// 1: voice frame
int ret = fvad_process(vad->fvad, data, samples);
// printf("%d ", ret); fflush(stdout);
score = vad->thresh + ret - 1;
// if voice frame set score > threshold
score = ret > 0 ? vad->thresh + 100 : 0;
} else {
#endif
int energy = 0, j = 0, count = 0;

6
tests/unit/Makefile.am
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@ -2,10 +2,14 @@ include $(top_srcdir)/build/modmake.rulesam
noinst_PROGRAMS = switch_event switch_hash switch_ivr_originate switch_utils switch_core switch_console switch_vpx switch_core_file \
switch_ivr_play_say switch_core_codec switch_rtp switch_xml
noinst_PROGRAMS+= switch_core_video switch_core_db
noinst_PROGRAMS+= switch_core_video switch_core_db switch_vad
AM_LDFLAGS = -avoid-version -no-undefined $(SWITCH_AM_LDFLAGS) $(openssl_LIBS)
AM_LDFLAGS += $(FREESWITCH_LIBS) $(switch_builddir)/libfreeswitch.la $(CORE_LIBS) $(APR_LIBS)
AM_CFLAGS = $(SWITCH_AM_CPPFLAGS)
AM_CPPFLAGS = $(SWITCH_AM_CPPFLAGS)
if HAVE_FVAD
AM_CFLAGS += -DSWITCH_HAVE_FVAD
endif
TESTS = $(noinst_PROGRAMS)

228
tests/unit/switch_vad.c Normal file
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@ -0,0 +1,228 @@
/*
* FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
* Copyright (C) 2020, Anthony Minessale II <anthm@freeswitch.org>
*
* Version: MPL 1.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is FreeSWITCH Modular Media Switching Software Library / Soft-Switch Application
*
* The Initial Developer of the Original Code is
* Anthony Minessale II <anthm@freeswitch.org>
* Portions created by the Initial Developer are Copyright (C)
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Chris Rienzo <chris@signalwire.com>
*
*
* switch_vad.c -- VAD tests
*
*/
#include <switch.h>
#include <stdlib.h>
#include <test/switch_test.h>
static float next_tone_frame(int16_t *buf, unsigned int samples, float pos)
{
// make sine wave of amplitude 7000 for 8000Hz sample rate VAD
float step = 600.0 / 8000.0 * 2.0 * M_PI;
unsigned int i;
for (i = 0; i < samples; i++) {
buf[i] = (int16_t)(7000.0 * sinf(pos));
pos += step;
}
return pos;
}
static void next_silence_frame(int16_t *buf, unsigned int samples)
{
unsigned int i;
for (i = 0; i < samples; i++) {
buf[i] = 0;
}
}
FST_CORE_BEGIN("./conf")
{
FST_SUITE_BEGIN(switch_vad)
{
FST_SETUP_BEGIN()
{
}
FST_SETUP_END()
FST_TEARDOWN_BEGIN()
{
}
FST_TEARDOWN_END()
#ifdef SWITCH_HAVE_FVAD
FST_TEST_BEGIN(fvad_mode_0)
{
int16_t *buf = malloc(sizeof(int16_t) * 160);
int duration;
float pos = 0.0;
int got_transition = 0;
switch_vad_state_t cur_state = SWITCH_VAD_STATE_NONE;
switch_vad_t *vad = switch_vad_init(8000, 1);
fst_requires(vad);
int res = switch_vad_set_mode(vad, 0); // tone is detected as speech in mode 0
fst_requires(res == 0);
switch_vad_set_param(vad, "silence_ms", 400);
switch_vad_set_param(vad, "voice_ms", 80);
switch_vad_set_param(vad, "debug", 10);
// generate a tone and pump it into the vad
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Start 200 ms tone\n");
duration = 200 / 20; // 200 ms
while (--duration >= 0) {
switch_vad_state_t new_state;
pos = next_tone_frame(buf, 160, pos);
new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 2);
fst_requires(cur_state == SWITCH_VAD_STATE_TALKING);
// feed silence frames into the vad
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Start 1000 ms silence\n");
duration = 1000 / 20; // 1000 ms
got_transition = 0;
next_silence_frame(buf, 160);
while (--duration >= 0) {
switch_vad_state_t new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 2);
fst_requires(cur_state == SWITCH_VAD_STATE_NONE);
// generate a tone < voice_ms
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Start 40 ms tone\n");
duration = 40 / 20; // 40 ms
got_transition = 0;
while (--duration >= 0) {
switch_vad_state_t new_state;
pos = next_tone_frame(buf, 160, pos);
new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 0);
fst_requires(cur_state == SWITCH_VAD_STATE_NONE);
// continue tone > voice_ms
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Continue with 60 ms tone\n");
duration = 60 / 20; // 60 ms
got_transition = 0;
while (--duration >= 0) {
switch_vad_state_t new_state;
pos = next_tone_frame(buf, 160, pos);
new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 1);
fst_requires(cur_state == SWITCH_VAD_STATE_START_TALKING);
free(buf);
switch_vad_destroy(&vad);
fst_check(vad == NULL);
}
FST_TEST_END()
#endif
FST_TEST_BEGIN(energy)
{
int16_t *buf = malloc(sizeof(int16_t) * 160);
int duration;
float pos = 0.0;
int got_transition = 0;
switch_vad_state_t cur_state = SWITCH_VAD_STATE_NONE;
switch_vad_t *vad = switch_vad_init(8000, 1);
fst_requires(vad);
int res = switch_vad_set_mode(vad, -1);
fst_requires(res == 0);
switch_vad_set_param(vad, "silence_ms", 400);
switch_vad_set_param(vad, "voice_ms", 80);
switch_vad_set_param(vad, "debug", 10);
// generate a tone and pump it into the vad
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Start 200 ms tone\n");
duration = 200 / 20; // 200 ms
while (--duration >= 0) {
switch_vad_state_t new_state;
pos = next_tone_frame(buf, 160, pos);
new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 2);
fst_requires(cur_state == SWITCH_VAD_STATE_TALKING);
// feed silence frames into the vad
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Start 1000 ms silence\n");
duration = 1000 / 20; // 1000 ms
got_transition = 0;
next_silence_frame(buf, 160);
while (--duration >= 0) {
switch_vad_state_t new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 2);
fst_requires(cur_state == SWITCH_VAD_STATE_NONE);
// generate a tone < voice_ms
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Start 40 ms tone\n");
duration = 40 / 20; // 40 ms
got_transition = 0;
while (--duration >= 0) {
switch_vad_state_t new_state;
pos = next_tone_frame(buf, 160, pos);
new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 0);
fst_requires(cur_state == SWITCH_VAD_STATE_NONE);
// continue tone > voice_ms
switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_INFO, "Continue with 60 ms tone\n");
duration = 60 / 20; // 60 ms
got_transition = 0;
while (--duration >= 0) {
switch_vad_state_t new_state;
pos = next_tone_frame(buf, 160, pos);
new_state = switch_vad_process(vad, buf, 160);
if (new_state != cur_state) got_transition++;
cur_state = new_state;
}
fst_requires(got_transition == 1);
fst_requires(cur_state == SWITCH_VAD_STATE_START_TALKING);
free(buf);
switch_vad_destroy(&vad);
fst_check(vad == NULL);
}
FST_TEST_END()
}
FST_SUITE_END()
}
FST_CORE_END()