summaryrefslogtreecommitdiffstats
path: root/src/pulsecore/svolume_arm.c
blob: 5bd1448f33ae9df0030325822fc1cc473e79f09e (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
/***
  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, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
  USA.
***/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <pulse/timeval.h>
#include <pulsecore/random.h>
#include <pulsecore/macro.h>
#include <pulsecore/g711.h>
#include <pulsecore/core-util.h>

#include "cpu-arm.h"

#include "sample-util.h"
#include "endianmacros.h"

#if defined (__arm__)

#define MOD_INC() \
    " subs  r0, r6, %2              \n\t" \
    " addcs r0, %1                  \n\t" \
    " movcs r6, r0                  \n\t"

static void
pa_volume_s16ne_arm (int16_t *samples, int32_t *volumes, unsigned channels, unsigned length)
{
    int32_t *ve;

    channels = PA_MAX (4U, channels);
    ve = volumes + channels;

    __asm__ __volatile__ (
        " mov r6, %1                      \n\t"
        " mov %3, %3, LSR #1              \n\t" /* length /= sizeof (int16_t) */
        " tst %3, #1                      \n\t" /* check for odd samples */
        " beq  2f                         \n\t"

        "1:                               \n\t"
        " ldr  r0, [r6], #4               \n\t" /* odd samples volumes */
        " ldrh r2, [%0]                   \n\t"

        " smulwb r0, r0, r2               \n\t"
        " ssat r0, #16, r0                \n\t"

        " strh r0, [%0], #2               \n\t"

        MOD_INC()

        "2:                               \n\t"
        " mov %3, %3, LSR #1              \n\t"
        " tst %3, #1                      \n\t" /* check for odd samples */
        " beq  4f                         \n\t"

        "3:                               \n\t"
        " ldrd r2, [r6], #8               \n\t" /* 2 samples at a time */
        " ldr  r0, [%0]                   \n\t"

        " smulwt r2, r2, r0               \n\t"
        " smulwb r3, r3, r0               \n\t"

        " ssat r2, #16, r2                \n\t"
        " ssat r3, #16, r3                \n\t"

        " pkhbt r0, r3, r2, LSL #16       \n\t"
        " str  r0, [%0], #4               \n\t"

        MOD_INC()

        "4:                               \n\t"
        " movs %3, %3, LSR #1             \n\t"
        " beq  6f                         \n\t"

        "5:                               \n\t"
        " ldrd r2, [r6], #8               \n\t" /* 4 samples at a time */
        " ldrd r4, [r6], #8               \n\t"
        " ldrd r0, [%0]                   \n\t"

        " smulwt r2, r2, r0               \n\t"
        " smulwb r3, r3, r0               \n\t"
        " smulwt r4, r4, r1               \n\t"
        " smulwb r5, r5, r1               \n\t"

        " ssat r2, #16, r2                \n\t"
        " ssat r3, #16, r3                \n\t"
        " ssat r4, #16, r4                \n\t"
        " ssat r5, #16, r5                \n\t"

        " pkhbt r0, r3, r2, LSL #16       \n\t"
        " pkhbt r1, r5, r4, LSL #16       \n\t"
        " strd  r0, [%0], #8              \n\t"

        MOD_INC()

        " subs %3, %3, #1                 \n\t"
        " bne 5b                          \n\t"
        "6:                               \n\t"

        : "+r" (samples), "+r" (volumes), "+r" (ve), "+r" (length)
        :
        : "r6", "r5", "r4", "r3", "r2", "r1", "r0", "cc"
    );
}

#undef RUN_TEST

#ifdef RUN_TEST
#define CHANNELS 2
#define SAMPLES 1023
#define TIMES 1000
#define PADDING 16

static void run_test (void) {
    int16_t samples[SAMPLES];
    int16_t samples_ref[SAMPLES];
    int16_t samples_orig[SAMPLES];
    int32_t volumes[CHANNELS + PADDING];
    int i, j, padding;
    pa_do_volume_func_t func;
    pa_usec_t start, stop;

    func = pa_get_volume_func (PA_SAMPLE_S16NE);

    printf ("checking ARM %zd\n", sizeof (samples));

    pa_random (samples, sizeof (samples));
    memcpy (samples_ref, samples, sizeof (samples));
    memcpy (samples_orig, samples, sizeof (samples));

    for (i = 0; i < CHANNELS; i++)
        volumes[i] = rand() >> 1;
    for (padding = 0; padding < PADDING; padding++, i++)
        volumes[i] = volumes[padding];

    func (samples_ref, volumes, CHANNELS, sizeof (samples));
    pa_volume_s16ne_arm (samples, volumes, CHANNELS, sizeof (samples));
    for (i = 0; i < SAMPLES; i++) {
        if (samples[i] != samples_ref[i]) {
            printf ("%d: %04x != %04x (%04x * %04x)\n", i, samples[i], samples_ref[i],
                  samples_orig[i], volumes[i % CHANNELS]);
        }
    }

    start = pa_rtclock_now();
    for (j = 0; j < TIMES; j++) {
        memcpy (samples, samples_orig, sizeof (samples));
        pa_volume_s16ne_arm (samples, volumes, CHANNELS, sizeof (samples));
    }
    stop = pa_rtclock_now();
    pa_log_info("ARM: %llu usec.", (long long unsigned int) (stop - start));

    start = pa_rtclock_now();
    for (j = 0; j < TIMES; j++) {
        memcpy (samples_ref, samples_orig, sizeof (samples));
        func (samples_ref, volumes, CHANNELS, sizeof (samples));
    }
    stop = pa_rtclock_now();
    pa_log_info("ref: %llu usec.", (long long unsigned int) (stop - start));
}
#endif

#endif /* defined (__arm__) */


void pa_volume_func_init_arm (pa_cpu_arm_flag_t flags) {
#if defined (__arm__)
    pa_log_info("Initialising ARM optimized functions.");

#ifdef RUN_TEST
    run_test ();
#endif

    pa_set_volume_func (PA_SAMPLE_S16NE,     (pa_do_volume_func_t) pa_volume_s16ne_arm);
#endif /* defined (__arm__) */
}