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/***
This file is part of PulseAudio.
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2.1 of the License,
or (at your option) any later version.
PulseAudio 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 Lesser General Public License
along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
***/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <check.h>
#include <unistd.h>
#include <stdlib.h>
#include <math.h>
#include <pulse/rtclock.h>
#include <pulsecore/random.h>
#include <pulsecore/macro.h>
#include "runtime-test-util.h"
static inline int32_t pa_mult_s16_volume_32(int16_t v, int32_t cv) {
/* Multiplying the 32 bit volume factor with the
* 16 bit sample might result in an 48 bit value. We
* want to do without 64 bit integers and hence do
* the multiplication independently for the HI and
* LO part of the volume. */
int32_t hi = cv >> 16;
int32_t lo = cv & 0xFFFF;
return ((v * lo) >> 16) + (v * hi);
}
static inline int32_t pa_mult_s16_volume_64(int16_t v, int32_t cv) {
/* Multiply with 64 bit integers on 64 bit platforms */
return (v * (int64_t) cv) >> 16;
}
#define SAMPLES 1028
#define TIMES 10000
#define TIMES2 100
START_TEST (mult_s16_test) {
int16_t samples[SAMPLES];
int32_t volumes[SAMPLES];
int32_t sum1 = 0, sum2 = 0;
int i;
pa_random(samples, sizeof(samples));
pa_random(volumes, sizeof(volumes));
for (i = 0; i < SAMPLES; i++) {
int32_t a = pa_mult_s16_volume_32(samples[i], volumes[i]);
int32_t b = pa_mult_s16_volume_64(samples[i], volumes[i]);
if (a != b) {
pa_log_debug("%d: %d != %d", i, a, b);
ck_abort();
}
}
PA_RUNTIME_TEST_RUN_START("32 bit mult", TIMES, TIMES2) {
for (i = 0; i < SAMPLES; i++) {
sum1 += pa_mult_s16_volume_32(samples[i], volumes[i]);
}
} PA_RUNTIME_TEST_RUN_STOP
PA_RUNTIME_TEST_RUN_START("64 bit mult", TIMES, TIMES2) {
for (i = 0; i < SAMPLES; i++)
sum2 += pa_mult_s16_volume_64(samples[i], volumes[i]);
} PA_RUNTIME_TEST_RUN_STOP
fail_unless(sum1 == sum2);
}
END_TEST
int main(int argc, char *argv[]) {
int failed = 0;
Suite *s;
TCase *tc;
SRunner *sr;
if (!getenv("MAKE_CHECK"))
pa_log_set_level(PA_LOG_DEBUG);
#ifdef HAVE_FAST_64BIT_OPERATIONS
pa_log_debug("Detected CPU with fast 64-bit operations.");
#else
pa_log_debug("Not detected CPU with fast 64-bit operations.");
#endif
s = suite_create("Mult-s16");
tc = tcase_create("mult-s16");
tcase_add_test(tc, mult_s16_test);
tcase_set_timeout(tc, 120);
suite_add_tcase(s, tc);
sr = srunner_create(s);
srunner_run_all(sr, CK_NORMAL);
failed = srunner_ntests_failed(sr);
srunner_free(sr);
return (failed == 0) ? EXIT_SUCCESS : EXIT_FAILURE;
}
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