mirror of
https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git
synced 2025-11-08 13:29:59 -05:00
5effc83479
FSF addresses used in PA sources are no longer valid and rpmlint generates numerous warnings during packaging because of this. This patch changes all FSF addresses to FSF web page according to the GPL how-to: https://www.gnu.org/licenses/gpl-howto.en.html Done automatically by sed-ing through sources.
167 lines
5.6 KiB
C
167 lines
5.6 KiB
C
/***
|
|
This file is part of PulseAudio.
|
|
|
|
Copyright 2004-2006 Lennart Poettering
|
|
Copyright 2009 Wim Taymans <wim.taymans@collabora.co.uk>
|
|
|
|
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 <pulsecore/random.h>
|
|
#include <pulsecore/macro.h>
|
|
#include <pulsecore/endianmacros.h>
|
|
|
|
#include "cpu-arm.h"
|
|
|
|
#include "sample-util.h"
|
|
|
|
#if defined (__arm__) && defined (HAVE_ARMV6)
|
|
|
|
#define MOD_INC() \
|
|
" subs r0, r6, %2 \n\t" \
|
|
" itt cs \n\t" \
|
|
" addcs r0, %1 \n\t" \
|
|
" movcs r6, r0 \n\t"
|
|
|
|
static pa_do_volume_func_t _volume_ref;
|
|
|
|
static void pa_volume_s16ne_arm(int16_t *samples, const int32_t *volumes, unsigned channels, unsigned length) {
|
|
/* Channels must be at least 4, and always a multiple of the original number.
|
|
* This is also the max amount we overread the volume array, which should
|
|
* have enough padding. */
|
|
const int32_t *ve = volumes + (channels == 3 ? 6 : PA_MAX (4U, channels));
|
|
unsigned rem = PA_ALIGN((size_t) samples) - (size_t) samples;
|
|
|
|
/* Make sure we're word-aligned, else performance _really_ sucks */
|
|
if (rem) {
|
|
_volume_ref(samples, volumes, channels, rem < length ? rem : length);
|
|
|
|
if (rem < length) {
|
|
length -= rem;
|
|
samples += rem / sizeof(*samples);
|
|
} else
|
|
return; /* we're done */
|
|
}
|
|
|
|
__asm__ __volatile__ (
|
|
" mov r6, %4 \n\t" /* r6 = volumes + rem */
|
|
" mov %3, %3, LSR #1 \n\t" /* length /= sizeof (int16_t) */
|
|
|
|
" cmp %3, #4 \n\t" /* check for 4+ samples */
|
|
" blt 2f \n\t"
|
|
|
|
/* See final case for how the multiplication works */
|
|
|
|
"1: \n\t"
|
|
" ldrd r2, [r6], #8 \n\t" /* 4 samples at a time */
|
|
" ldrd r4, [r6], #8 \n\t"
|
|
" ldrd r0, [%0] \n\t"
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
" smulwt r2, r2, r0 \n\t"
|
|
" smulwb r3, r3, r0 \n\t"
|
|
" smulwt r4, r4, r1 \n\t"
|
|
" smulwb r5, r5, r1 \n\t"
|
|
#else
|
|
" smulwb r2, r2, r0 \n\t"
|
|
" smulwt r3, r3, r0 \n\t"
|
|
" smulwb r4, r4, r1 \n\t"
|
|
" smulwt r5, r5, r1 \n\t"
|
|
#endif
|
|
|
|
" ssat r2, #16, r2 \n\t"
|
|
" ssat r3, #16, r3 \n\t"
|
|
" ssat r4, #16, r4 \n\t"
|
|
" ssat r5, #16, r5 \n\t"
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
" pkhbt r0, r3, r2, LSL #16 \n\t"
|
|
" pkhbt r1, r5, r4, LSL #16 \n\t"
|
|
#else
|
|
" pkhbt r0, r2, r3, LSL #16 \n\t"
|
|
" pkhbt r1, r4, r5, LSL #16 \n\t"
|
|
#endif
|
|
" strd r0, [%0], #8 \n\t"
|
|
|
|
MOD_INC()
|
|
|
|
" subs %3, %3, #4 \n\t"
|
|
" cmp %3, #4 \n\t"
|
|
" bge 1b \n\t"
|
|
|
|
"2: \n\t"
|
|
" cmp %3, #2 \n\t"
|
|
" blt 3f \n\t"
|
|
|
|
" ldrd r2, [r6], #8 \n\t" /* 2 samples at a time */
|
|
" ldr r0, [%0] \n\t"
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
" smulwt r2, r2, r0 \n\t"
|
|
" smulwb r3, r3, r0 \n\t"
|
|
#else
|
|
" smulwb r2, r2, r0 \n\t"
|
|
" smulwt r3, r3, r0 \n\t"
|
|
#endif
|
|
|
|
" ssat r2, #16, r2 \n\t"
|
|
" ssat r3, #16, r3 \n\t"
|
|
|
|
#ifdef WORDS_BIGENDIAN
|
|
" pkhbt r0, r3, r2, LSL #16 \n\t"
|
|
#else
|
|
" pkhbt r0, r2, r3, LSL #16 \n\t"
|
|
#endif
|
|
" str r0, [%0], #4 \n\t"
|
|
|
|
MOD_INC()
|
|
|
|
" subs %3, %3, #2 \n\t"
|
|
|
|
"3: \n\t" /* check for odd # of samples */
|
|
" cmp %3, #1 \n\t"
|
|
" bne 4f \n\t"
|
|
|
|
" ldr r0, [r6], #4 \n\t" /* r0 = volume */
|
|
" ldrh r2, [%0] \n\t" /* r2 = sample */
|
|
|
|
" smulwb r0, r0, r2 \n\t" /* r0 = (r0 * r2) >> 16 */
|
|
" ssat r0, #16, r0 \n\t" /* r0 = PA_CLAMP(r0, 0x7FFF) */
|
|
|
|
" strh r0, [%0], #2 \n\t" /* sample = r0 */
|
|
|
|
"4: \n\t"
|
|
|
|
: "+r" (samples), "+r" (volumes), "+r" (ve), "+r" (length)
|
|
: "r" (volumes + ((rem / sizeof(*samples)) % channels))
|
|
: "r6", "r5", "r4", "r3", "r2", "r1", "r0", "cc"
|
|
);
|
|
}
|
|
|
|
#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
|
|
|
|
void pa_volume_func_init_arm(pa_cpu_arm_flag_t flags) {
|
|
#if defined (__arm__) && defined (HAVE_ARMV6)
|
|
pa_log_info("Initialising ARM optimized volume functions.");
|
|
|
|
if (!_volume_ref)
|
|
_volume_ref = pa_get_volume_func(PA_SAMPLE_S16NE);
|
|
|
|
pa_set_volume_func(PA_SAMPLE_S16NE, (pa_do_volume_func_t) pa_volume_s16ne_arm);
|
|
#endif /* defined (__arm__) && defined (HAVE_ARMV6) */
|
|
}
|