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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 <stdio.h>
#include <pulse/sample.h>
#include <pulsecore/resampler.h>
#include <pulsecore/macro.h>
#include <pulsecore/memblock.h>
struct resample_flags {
const char *str;
pa_resample_flags_t value;
};
/* Call like this to get an initializer for struct resample_flags:
* RESAMPLE_FLAGS(PA_RESAMPLER_NO_LFE)
*/
#define RESAMPLE_FLAGS(flags) { .str = #flags, .value = (flags) }
int main(int argc, char *argv[]) {
static const pa_channel_map maps[] = {
{ 1, { PA_CHANNEL_POSITION_MONO } },
{ 2, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT } },
{ 3, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_CENTER } },
{ 3, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_LFE } },
{ 3, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_CENTER } },
{ 4, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_CENTER, PA_CHANNEL_POSITION_LFE } },
{ 4, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_CENTER, PA_CHANNEL_POSITION_REAR_CENTER } },
{ 4, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT } },
{ 5, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, PA_CHANNEL_POSITION_CENTER } },
{ 5, { PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, PA_CHANNEL_POSITION_LFE } },
{ 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 } },
{ 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 } },
{ 0, { 0 } }
};
static const struct resample_flags flag_sets[] = {
RESAMPLE_FLAGS(0),
RESAMPLE_FLAGS(PA_RESAMPLER_NO_REMAP),
RESAMPLE_FLAGS(PA_RESAMPLER_NO_REMIX),
RESAMPLE_FLAGS(PA_RESAMPLER_NO_LFE),
RESAMPLE_FLAGS(PA_RESAMPLER_NO_FILL_SINK),
RESAMPLE_FLAGS(PA_RESAMPLER_NO_LFE | PA_RESAMPLER_NO_FILL_SINK),
{ .str = NULL, .value = 0 },
};
unsigned i, j, k;
pa_mempool *pool;
unsigned crossover_freq = 120;
pa_log_set_level(PA_LOG_DEBUG);
pa_assert_se(pool = pa_mempool_new(PA_MEM_TYPE_PRIVATE, 0, true));
for (i = 0; maps[i].channels > 0; i++)
for (j = 0; maps[j].channels > 0; j++) {
char a[PA_CHANNEL_MAP_SNPRINT_MAX], b[PA_CHANNEL_MAP_SNPRINT_MAX];
pa_resampler *r;
pa_sample_spec ss1, ss2;
ss1.channels = maps[i].channels;
ss2.channels = maps[j].channels;
ss1.rate = ss2.rate = 44100;
ss1.format = ss2.format = PA_SAMPLE_S16NE;
for (k = 0; flag_sets[k].str; k++) {
pa_log_info("Converting from '%s' to '%s' with flags %s.", pa_channel_map_snprint(a, sizeof(a), &maps[i]),
pa_channel_map_snprint(b, sizeof(b), &maps[j]), flag_sets[k].str);
r = pa_resampler_new(pool, &ss1, &maps[i], &ss2, &maps[j], crossover_freq, PA_RESAMPLER_AUTO,
flag_sets[k].value);
/* We don't really care for the resampler. We just want to
* see the remixing debug output. */
pa_resampler_free(r);
}
}
pa_mempool_unref(pool);
return 0;
}
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