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218 lines
7.2 KiB
C
218 lines
7.2 KiB
C
/***
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This file is part of PulseAudio.
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Copyright 2004-2006 Lennart Poettering
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Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
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PulseAudio is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published
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by the Free Software Foundation; either version 2.1 of the License,
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or (at your option) any later version.
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PulseAudio is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with PulseAudio; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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USA.
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***/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#include <pulsecore/random.h>
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#include <pulsecore/macro.h>
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#include <pulsecore/endianmacros.h>
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#include "cpu-arm.h"
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#include "sample-util.h"
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#if defined (__arm__) && defined (HAVE_ARMV6)
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#define MOD_INC() \
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" subs r0, r6, %2 \n\t" \
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" itt cs \n\t" \
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" addcs r0, %1 \n\t" \
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" movcs r6, r0 \n\t"
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static void pa_volume_s16ne_arm(int16_t *samples, int32_t *volumes, unsigned channels, unsigned length) {
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int32_t *ve;
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/* Channels must be at least 4, and always a multiple of the original number.
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* This is also the max amount we overread the volume array, which should
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* have enough padding. */
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channels = channels == 3 ? 6 : PA_MAX (4U, channels);
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ve = volumes + channels;
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__asm__ __volatile__ (
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" mov r6, %1 \n\t"
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" mov %3, %3, LSR #1 \n\t" /* length /= sizeof (int16_t) */
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" tst %3, #1 \n\t" /* check for odd samples */
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" beq 2f \n\t"
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"1: \n\t"
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" ldr r0, [r6], #4 \n\t" /* odd samples volumes */
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" ldrh r2, [%0] \n\t"
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" smulwb r0, r0, r2 \n\t"
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" ssat r0, #16, r0 \n\t"
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" strh r0, [%0], #2 \n\t"
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MOD_INC()
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"2: \n\t"
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" mov %3, %3, LSR #1 \n\t"
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" tst %3, #1 \n\t" /* check for odd samples */
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" beq 4f \n\t"
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"3: \n\t"
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" ldrd r2, [r6], #8 \n\t" /* 2 samples at a time */
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" ldr r0, [%0] \n\t"
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" smulwt r2, r2, r0 \n\t"
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" smulwb r3, r3, r0 \n\t"
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" ssat r2, #16, r2 \n\t"
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" ssat r3, #16, r3 \n\t"
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" pkhbt r0, r3, r2, LSL #16 \n\t"
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" str r0, [%0], #4 \n\t"
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MOD_INC()
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"4: \n\t"
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" movs %3, %3, LSR #1 \n\t"
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" beq 6f \n\t"
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"5: \n\t"
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" ldrd r2, [r6], #8 \n\t" /* 4 samples at a time */
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" ldrd r4, [r6], #8 \n\t"
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" ldrd r0, [%0] \n\t"
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" smulwt r2, r2, r0 \n\t"
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" smulwb r3, r3, r0 \n\t"
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" smulwt r4, r4, r1 \n\t"
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" smulwb r5, r5, r1 \n\t"
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" ssat r2, #16, r2 \n\t"
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" ssat r3, #16, r3 \n\t"
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" ssat r4, #16, r4 \n\t"
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" ssat r5, #16, r5 \n\t"
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" pkhbt r0, r3, r2, LSL #16 \n\t"
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" pkhbt r1, r5, r4, LSL #16 \n\t"
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" strd r0, [%0], #8 \n\t"
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MOD_INC()
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" subs %3, %3, #1 \n\t"
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" bne 5b \n\t"
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"6: \n\t"
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: "+r" (samples), "+r" (volumes), "+r" (ve), "+r" (length)
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:
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: "r6", "r5", "r4", "r3", "r2", "r1", "r0", "cc"
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);
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}
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#undef RUN_TEST
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#ifdef RUN_TEST
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#define CHANNELS 2
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#define SAMPLES 1022
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#define TIMES 1000
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#define TIMES2 100
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#define PADDING 16
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static void run_test(void) {
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int16_t samples[SAMPLES];
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int16_t samples_ref[SAMPLES];
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int16_t samples_orig[SAMPLES];
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int32_t volumes[CHANNELS + PADDING];
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int i, j, padding;
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pa_do_volume_func_t func;
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pa_usec_t start, stop;
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int k;
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pa_usec_t min = INT_MAX, max = 0;
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double s1 = 0, s2 = 0;
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func = pa_get_volume_func(PA_SAMPLE_S16NE);
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printf("checking ARM %zd\n", sizeof(samples));
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pa_random(samples, sizeof(samples));
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memcpy(samples_ref, samples, sizeof(samples));
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memcpy(samples_orig, samples, sizeof(samples));
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for (i = 0; i < CHANNELS; i++)
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volumes[i] = PA_CLAMP_VOLUME(rand() >> 1);
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for (padding = 0; padding < PADDING; padding++, i++)
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volumes[i] = volumes[padding];
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func(samples_ref, volumes, CHANNELS, sizeof(samples));
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pa_volume_s16ne_arm(samples, volumes, CHANNELS, sizeof(samples));
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for (i = 0; i < SAMPLES; i++) {
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if (samples[i] != samples_ref[i]) {
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printf ("%d: %04x != %04x (%04x * %04x)\n", i, samples[i], samples_ref[i],
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samples_orig[i], volumes[i % CHANNELS]);
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}
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}
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for (k = 0; k < TIMES2; k++) {
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start = pa_rtclock_now();
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for (j = 0; j < TIMES; j++) {
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memcpy(samples, samples_orig, sizeof(samples));
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pa_volume_s16ne_arm(samples, volumes, CHANNELS, sizeof(samples));
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}
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stop = pa_rtclock_now();
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if (min > (stop - start)) min = stop - start;
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if (max < (stop - start)) max = stop - start;
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s1 += stop - start;
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s2 += (stop - start) * (stop - start);
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}
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pa_log_info("ARM: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
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(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
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min = INT_MAX; max = 0;
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s1 = s2 = 0;
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for (k = 0; k < TIMES2; k++) {
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start = pa_rtclock_now();
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for (j = 0; j < TIMES; j++) {
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memcpy(samples_ref, samples_orig, sizeof(samples));
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func(samples_ref, volumes, CHANNELS, sizeof(samples));
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}
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stop = pa_rtclock_now();
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if (min > (stop - start)) min = stop - start;
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if (max < (stop - start)) max = stop - start;
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s1 += stop - start;
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s2 += (stop - start) * (stop - start);
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}
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pa_log_info("ref: %llu usec (min = %llu, max = %llu, stddev = %g).", (long long unsigned int)s1,
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(long long unsigned int)min, (long long unsigned int)max, sqrt(TIMES2 * s2 - s1 * s1) / TIMES2);
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pa_assert_se(memcmp(samples_ref, samples, sizeof(samples)) == 0);
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}
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#endif
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#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
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void pa_volume_func_init_arm(pa_cpu_arm_flag_t flags) {
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#if defined (__arm__) && defined (HAVE_ARMV6)
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pa_log_info("Initialising ARM optimized functions.");
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#ifdef RUN_TEST
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run_test();
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#endif
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pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_arm);
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#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
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}
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