2 This file is part of PulseAudio.
4 Copyright 2004-2006 Lennart Poettering
6 PulseAudio is free software; you can redistribute it and/or modify
7 it under the terms of the GNU Lesser General Public License as published
8 by the Free Software Foundation; either version 2.1 of the License,
9 or (at your option) any later version.
11 PulseAudio is distributed in the hope that it will be useful, but
12 WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 General Public License for more details.
16 You should have received a copy of the GNU Lesser General Public License
17 along with PulseAudio; if not, write to the Free Software
18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
29 #include <pulse/i18n.h>
31 #include <pulsecore/core-util.h>
32 #include <pulsecore/macro.h>
33 #include <pulsecore/sample-util.h>
37 int pa_cvolume_equal(const pa_cvolume *a, const pa_cvolume *b) {
42 pa_return_val_if_fail(pa_cvolume_valid(a), 0);
43 pa_return_val_if_fail(pa_cvolume_valid(b), 0);
45 if (a->channels != b->channels)
48 for (i = 0; i < a->channels; i++)
49 if (a->values[i] != b->values[i])
55 pa_cvolume* pa_cvolume_init(pa_cvolume *a) {
62 for (c = 0; c < PA_CHANNELS_MAX; c++)
63 a->values[c] = (pa_volume_t) -1;
68 pa_cvolume* pa_cvolume_set(pa_cvolume *a, unsigned channels, pa_volume_t v) {
72 pa_assert(channels > 0);
73 pa_assert(channels <= PA_CHANNELS_MAX);
75 a->channels = (uint8_t) channels;
77 for (i = 0; i < a->channels; i++)
83 pa_volume_t pa_cvolume_avg(const pa_cvolume *a) {
88 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
90 for (c = 0; c < a->channels; c++)
95 return (pa_volume_t) sum;
98 pa_volume_t pa_cvolume_avg_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
105 return pa_cvolume_avg(a);
107 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
109 for (c = n = 0; c < a->channels; c++) {
111 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
121 return (pa_volume_t) sum;
124 pa_volume_t pa_cvolume_max(const pa_cvolume *a) {
129 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
131 for (c = 0; c < a->channels; c++)
132 if (a->values[c] > m)
138 pa_volume_t pa_cvolume_max_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
145 return pa_cvolume_max(a);
147 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
149 for (c = n = 0; c < a->channels; c++) {
151 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
154 if (a->values[c] > m)
161 pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
162 return pa_sw_volume_from_linear(pa_sw_volume_to_linear(a) * pa_sw_volume_to_linear(b));
165 pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) {
166 double v = pa_sw_volume_to_linear(b);
171 return pa_sw_volume_from_linear(pa_sw_volume_to_linear(a) / v);
174 /* Amplitude, not power */
175 static double linear_to_dB(double v) {
176 return 20.0 * log10(v);
179 static double dB_to_linear(double v) {
180 return pow(10.0, v / 20.0);
183 pa_volume_t pa_sw_volume_from_dB(double dB) {
184 if (isinf(dB) < 0 || dB <= PA_DECIBEL_MININFTY)
185 return PA_VOLUME_MUTED;
187 return pa_sw_volume_from_linear(dB_to_linear(dB));
190 double pa_sw_volume_to_dB(pa_volume_t v) {
192 if (v <= PA_VOLUME_MUTED)
193 return PA_DECIBEL_MININFTY;
195 return linear_to_dB(pa_sw_volume_to_linear(v));
198 pa_volume_t pa_sw_volume_from_linear(double v) {
201 return PA_VOLUME_MUTED;
204 * We use a cubic mapping here, as suggested and discussed here:
206 * http://www.robotplanet.dk/audio/audio_gui_design/
207 * http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-May/thread.html#23151
209 * We make sure that the conversion to linear and back yields the
210 * same volume value! That's why we need the lround() below!
213 return (pa_volume_t) lround(cbrt(v) * PA_VOLUME_NORM);
216 double pa_sw_volume_to_linear(pa_volume_t v) {
219 if (v <= PA_VOLUME_MUTED)
222 if (v == PA_VOLUME_NORM)
225 f = ((double) v / PA_VOLUME_NORM);
230 char *pa_cvolume_snprint(char *s, size_t l, const pa_cvolume *c) {
232 pa_bool_t first = TRUE;
241 if (!pa_cvolume_valid(c)) {
242 pa_snprintf(s, l, _("(invalid)"));
248 for (channel = 0; channel < c->channels && l > 1; channel++) {
249 l -= pa_snprintf(e, l, "%s%u: %3u%%",
252 (c->values[channel]*100)/PA_VOLUME_NORM);
261 char *pa_volume_snprint(char *s, size_t l, pa_volume_t v) {
267 if (v == (pa_volume_t) -1) {
268 pa_snprintf(s, l, _("(invalid)"));
272 pa_snprintf(s, l, "%3u%%", (v*100)/PA_VOLUME_NORM);
276 char *pa_sw_cvolume_snprint_dB(char *s, size_t l, const pa_cvolume *c) {
278 pa_bool_t first = TRUE;
287 if (!pa_cvolume_valid(c)) {
288 pa_snprintf(s, l, _("(invalid)"));
294 for (channel = 0; channel < c->channels && l > 1; channel++) {
295 double f = pa_sw_volume_to_dB(c->values[channel]);
297 l -= pa_snprintf(e, l, "%s%u: %0.2f dB",
300 isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
309 char *pa_sw_volume_snprint_dB(char *s, size_t l, pa_volume_t v) {
317 if (v == (pa_volume_t) -1) {
318 pa_snprintf(s, l, _("(invalid)"));
322 f = pa_sw_volume_to_dB(v);
323 pa_snprintf(s, l, "%0.2f dB",
324 isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
329 int pa_cvolume_channels_equal_to(const pa_cvolume *a, pa_volume_t v) {
333 pa_return_val_if_fail(pa_cvolume_valid(a), 0);
335 for (c = 0; c < a->channels; c++)
336 if (a->values[c] != v)
342 pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
349 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
350 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
352 for (i = 0; i < a->channels && i < b->channels; i++)
353 dest->values[i] = pa_sw_volume_multiply(a->values[i], b->values[i]);
355 dest->channels = (uint8_t) i;
360 pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
366 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
368 for (i = 0; i < a->channels; i++)
369 dest->values[i] = pa_sw_volume_multiply(a->values[i], b);
371 dest->channels = (uint8_t) i;
376 pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
383 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
384 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
386 for (i = 0; i < a->channels && i < b->channels; i++)
387 dest->values[i] = pa_sw_volume_divide(a->values[i], b->values[i]);
389 dest->channels = (uint8_t) i;
394 pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
400 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
402 for (i = 0; i < a->channels; i++)
403 dest->values[i] = pa_sw_volume_divide(a->values[i], b);
405 dest->channels = (uint8_t) i;
410 int pa_cvolume_valid(const pa_cvolume *v) {
415 if (v->channels <= 0 || v->channels > PA_CHANNELS_MAX)
418 for (c = 0; c < v->channels; c++)
419 if (v->values[c] == (pa_volume_t) -1)
425 static pa_bool_t on_left(pa_channel_position_t p) {
426 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_LEFT);
429 static pa_bool_t on_right(pa_channel_position_t p) {
430 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_RIGHT);
433 static pa_bool_t on_center(pa_channel_position_t p) {
434 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_CENTER);
437 static pa_bool_t on_lfe(pa_channel_position_t p) {
438 return p == PA_CHANNEL_POSITION_LFE;
441 static pa_bool_t on_front(pa_channel_position_t p) {
442 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_FRONT);
445 static pa_bool_t on_rear(pa_channel_position_t p) {
446 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_REAR);
449 pa_cvolume *pa_cvolume_remap(pa_cvolume *v, const pa_channel_map *from, const pa_channel_map *to) {
457 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
458 pa_return_val_if_fail(pa_channel_map_valid(from), NULL);
459 pa_return_val_if_fail(pa_channel_map_valid(to), NULL);
460 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, from), NULL);
462 if (pa_channel_map_equal(from, to))
465 result.channels = to->channels;
467 for (b = 0; b < to->channels; b++) {
471 for (a = 0; a < from->channels; a++)
472 if (from->map[a] == to->map[b]) {
478 for (a = 0; a < from->channels; a++)
479 if ((on_left(from->map[a]) && on_left(to->map[b])) ||
480 (on_right(from->map[a]) && on_right(to->map[b])) ||
481 (on_center(from->map[a]) && on_center(to->map[b])) ||
482 (on_lfe(from->map[a]) && on_lfe(to->map[b]))) {
490 k = pa_cvolume_avg(v);
494 result.values[b] = k;
501 int pa_cvolume_compatible(const pa_cvolume *v, const pa_sample_spec *ss) {
506 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
507 pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
509 return v->channels == ss->channels;
512 int pa_cvolume_compatible_with_channel_map(const pa_cvolume *v, const pa_channel_map *cm) {
516 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
517 pa_return_val_if_fail(pa_channel_map_valid(cm), 0);
519 return v->channels == cm->channels;
522 static void get_avg_lr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *l, pa_volume_t *r) {
524 pa_volume_t left = 0, right = 0;
525 unsigned n_left = 0, n_right = 0;
529 pa_assert(map->channels == v->channels);
533 for (c = 0; c < map->channels; c++) {
534 if (on_left(map->map[c])) {
535 left += v->values[c];
537 } else if (on_right(map->map[c])) {
538 right += v->values[c];
551 *r = right / n_right;
554 float pa_cvolume_get_balance(const pa_cvolume *v, const pa_channel_map *map) {
555 pa_volume_t left, right;
560 pa_return_val_if_fail(pa_cvolume_valid(v), 0.0f);
561 pa_return_val_if_fail(pa_channel_map_valid(map), 0.0f);
562 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
564 if (!pa_channel_map_can_balance(map))
567 get_avg_lr(map, v, &left, &right);
582 return -1.0f + ((float) right / (float) left);
584 return 1.0f - ((float) left / (float) right);
587 pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
588 pa_volume_t left, nleft, right, nright, m;
593 pa_assert(new_balance >= -1.0f);
594 pa_assert(new_balance <= 1.0f);
596 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
597 pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
598 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
600 if (!pa_channel_map_can_balance(map))
603 get_avg_lr(map, v, &left, &right);
605 m = PA_MAX(left, right);
607 if (new_balance <= 0) {
608 nright = (new_balance + 1.0f) * m;
611 nleft = (1.0f - new_balance) * m;
615 for (c = 0; c < map->channels; c++) {
616 if (on_left(map->map[c])) {
618 v->values[c] = nleft;
620 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nleft) / (uint64_t) left);
621 } else if (on_right(map->map[c])) {
623 v->values[c] = nright;
625 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
632 pa_cvolume* pa_cvolume_scale(pa_cvolume *v, pa_volume_t max) {
638 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
639 pa_return_val_if_fail(max != (pa_volume_t) -1, NULL);
641 t = pa_cvolume_max(v);
643 if (t <= PA_VOLUME_MUTED)
644 return pa_cvolume_set(v, v->channels, max);
646 for (c = 0; c < v->channels; c++)
647 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
652 pa_cvolume* pa_cvolume_scale_mask(pa_cvolume *v, pa_volume_t max, pa_channel_map *cm, pa_channel_position_mask_t mask) {
658 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
659 pa_return_val_if_fail(max != (pa_volume_t) -1, NULL);
661 t = pa_cvolume_max_mask(v, cm, mask);
663 if (t <= PA_VOLUME_MUTED)
664 return pa_cvolume_set(v, v->channels, max);
666 for (c = 0; c < v->channels; c++)
667 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
672 static void get_avg_fr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *f, pa_volume_t *r) {
674 pa_volume_t front = 0, rear = 0;
675 unsigned n_front = 0, n_rear = 0;
679 pa_assert(map->channels == v->channels);
683 for (c = 0; c < map->channels; c++) {
684 if (on_front(map->map[c])) {
685 front += v->values[c];
687 } else if (on_rear(map->map[c])) {
688 rear += v->values[c];
696 *f = front / n_front;
704 float pa_cvolume_get_fade(const pa_cvolume *v, const pa_channel_map *map) {
705 pa_volume_t front, rear;
710 pa_return_val_if_fail(pa_cvolume_valid(v), 0.0f);
711 pa_return_val_if_fail(pa_channel_map_valid(map), 0.0f);
712 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
714 if (!pa_channel_map_can_fade(map))
717 get_avg_fr(map, v, &front, &rear);
723 return -1.0f + ((float) front / (float) rear);
725 return 1.0f - ((float) rear / (float) front);
728 pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade) {
729 pa_volume_t front, nfront, rear, nrear, m;
734 pa_assert(new_fade >= -1.0f);
735 pa_assert(new_fade <= 1.0f);
737 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
738 pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
739 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
741 if (!pa_channel_map_can_fade(map))
744 get_avg_fr(map, v, &front, &rear);
746 m = PA_MAX(front, rear);
749 nfront = (new_fade + 1.0f) * m;
752 nrear = (1.0f - new_fade) * m;
756 for (c = 0; c < map->channels; c++) {
757 if (on_front(map->map[c])) {
759 v->values[c] = nfront;
761 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nfront) / (uint64_t) front);
762 } else if (on_rear(map->map[c])) {
764 v->values[c] = nrear;
766 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
773 pa_cvolume* pa_cvolume_set_position(
775 const pa_channel_map *map,
776 pa_channel_position_t t,
780 pa_bool_t good = FALSE;
785 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), NULL);
786 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, NULL);
788 for (c = 0; c < map->channels; c++)
789 if (map->map[c] == t) {
794 return good ? cv : NULL;
797 pa_volume_t pa_cvolume_get_position(
799 const pa_channel_map *map,
800 pa_channel_position_t t) {
803 pa_volume_t v = PA_VOLUME_MUTED;
808 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), PA_VOLUME_MUTED);
809 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, PA_VOLUME_MUTED);
811 for (c = 0; c < map->channels; c++)
812 if (map->map[c] == t)
813 if (cv->values[c] > v)
819 pa_cvolume* pa_cvolume_merge(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
826 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
827 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
829 for (i = 0; i < a->channels && i < b->channels; i++)
830 dest->values[i] = PA_MAX(a->values[i], b->values[i]);
832 dest->channels = (uint8_t) i;