1/***
2  This file is part of PulseAudio.
3
4  PulseAudio is free software; you can redistribute it and/or modify
5  it under the terms of the GNU Lesser General Public License as published
6  by the Free Software Foundation; either version 2.1 of the License,
7  or (at your option) any later version.
8
9  PulseAudio is distributed in the hope that it will be useful, but
10  WITHOUT ANY WARRANTY; without even the implied warranty of
11  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12  General Public License for more details.
13
14  You should have received a copy of the GNU Lesser General Public License
15  along with PulseAudio; if not, see <http://www.gnu.org/licenses/>.
16***/
17
18#ifdef HAVE_CONFIG_H
19#include <config.h>
20#endif
21
22#include <stdio.h>
23
24#include <pulse/sample.h>
25
26#include <pulsecore/resampler.h>
27#include <pulsecore/macro.h>
28#include <pulsecore/memblock.h>
29
30struct resample_flags {
31    const char *str;
32    pa_resample_flags_t value;
33};
34
35/* Call like this to get an initializer for struct resample_flags:
36 *     RESAMPLE_FLAGS(PA_RESAMPLER_PRODUCE_LFE)
37 */
38#define RESAMPLE_FLAGS(flags) { .str = #flags, .value = (flags) }
39
40
41int main(int argc, char *argv[]) {
42
43    static const pa_channel_map maps[] = {
44        { 1, { PA_CHANNEL_POSITION_MONO } },
45        { 2, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT } },
46        { 3, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_CENTER } },
47        { 3, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_LFE } },
48        { 3, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_CENTER } },
49        { 4, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_CENTER, PA_CHANNEL_POSITION_LFE } },
50        { 4, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_CENTER, PA_CHANNEL_POSITION_REAR_CENTER } },
51        { 4, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT } },
52        { 5, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, PA_CHANNEL_POSITION_CENTER } },
53        { 5, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, PA_CHANNEL_POSITION_LFE } },
54        { 6, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, PA_CHANNEL_POSITION_LFE, PA_CHANNEL_POSITION_CENTER } },
55        { 8, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, PA_CHANNEL_POSITION_LFE, PA_CHANNEL_POSITION_CENTER, PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT } },
56        { 0, { 0 } }
57    };
58
59    static const struct resample_flags flag_sets[] = {
60        RESAMPLE_FLAGS(0),
61        RESAMPLE_FLAGS(PA_RESAMPLER_NO_REMAP),
62        RESAMPLE_FLAGS(PA_RESAMPLER_NO_REMIX),
63        RESAMPLE_FLAGS(PA_RESAMPLER_PRODUCE_LFE),
64        RESAMPLE_FLAGS(PA_RESAMPLER_NO_FILL_SINK),
65        RESAMPLE_FLAGS(PA_RESAMPLER_PRODUCE_LFE | PA_RESAMPLER_NO_FILL_SINK),
66        RESAMPLE_FLAGS(PA_RESAMPLER_CONSUME_LFE),
67        RESAMPLE_FLAGS(PA_RESAMPLER_CONSUME_LFE | PA_RESAMPLER_NO_FILL_SINK),
68        RESAMPLE_FLAGS(PA_RESAMPLER_PRODUCE_LFE | PA_RESAMPLER_CONSUME_LFE),
69        RESAMPLE_FLAGS(PA_RESAMPLER_PRODUCE_LFE | PA_RESAMPLER_CONSUME_LFE | PA_RESAMPLER_NO_FILL_SINK),
70        { .str = NULL, .value = 0 },
71    };
72
73    unsigned i, j, k;
74    pa_mempool *pool;
75    unsigned crossover_freq = 120;
76
77    pa_log_set_level(PA_LOG_DEBUG);
78
79    pa_assert_se(pool = pa_mempool_new(PA_MEM_TYPE_PRIVATE, 0, true));
80
81    for (i = 0; maps[i].channels > 0; i++)
82        for (j = 0; maps[j].channels > 0; j++) {
83            char a[PA_CHANNEL_MAP_SNPRINT_MAX], b[PA_CHANNEL_MAP_SNPRINT_MAX];
84            pa_resampler *r;
85            pa_sample_spec ss1, ss2;
86
87            ss1.channels = maps[i].channels;
88            ss2.channels = maps[j].channels;
89
90            ss1.rate = ss2.rate = 44100;
91            ss1.format = ss2.format = PA_SAMPLE_S16NE;
92
93            for (k = 0; flag_sets[k].str; k++) {
94                pa_log_info("Converting from '%s' to '%s' with flags %s.", pa_channel_map_snprint(a, sizeof(a), &maps[i]),
95                            pa_channel_map_snprint(b, sizeof(b), &maps[j]), flag_sets[k].str);
96
97                r = pa_resampler_new(pool, &ss1, &maps[i], &ss2, &maps[j], crossover_freq, PA_RESAMPLER_AUTO,
98                                     flag_sets[k].value);
99
100                /* We don't really care for the resampler. We just want to
101                 * see the remixing debug output. */
102
103                pa_resampler_free(r);
104            }
105        }
106
107    pa_mempool_unref(pool);
108
109    return 0;
110}
111