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);
44 if (PA_UNLIKELY(a == b))
47 pa_return_val_if_fail(pa_cvolume_valid(b), 0);
49 if (a->channels != b->channels)
52 for (i = 0; i < a->channels; i++)
53 if (a->values[i] != b->values[i])
59 pa_cvolume* pa_cvolume_init(pa_cvolume *a) {
66 for (c = 0; c < PA_CHANNELS_MAX; c++)
67 a->values[c] = PA_VOLUME_INVALID;
72 pa_cvolume* pa_cvolume_set(pa_cvolume *a, unsigned channels, pa_volume_t v) {
76 pa_assert(channels > 0);
77 pa_assert(channels <= PA_CHANNELS_MAX);
79 a->channels = (uint8_t) channels;
81 for (i = 0; i < a->channels; i++)
87 pa_volume_t pa_cvolume_avg(const pa_cvolume *a) {
92 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
94 for (c = 0; c < a->channels; c++)
99 return (pa_volume_t) sum;
102 pa_volume_t pa_cvolume_avg_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
109 return pa_cvolume_avg(a);
111 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
113 for (c = n = 0; c < a->channels; c++) {
115 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
125 return (pa_volume_t) sum;
128 pa_volume_t pa_cvolume_max(const pa_cvolume *a) {
129 pa_volume_t m = PA_VOLUME_MUTED;
133 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
135 for (c = 0; c < a->channels; c++)
136 if (a->values[c] > m)
142 pa_volume_t pa_cvolume_min(const pa_cvolume *a) {
143 pa_volume_t m = PA_VOLUME_MAX;
147 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
149 for (c = 0; c < a->channels; c++)
150 if (a->values[c] < m)
156 pa_volume_t pa_cvolume_max_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
157 pa_volume_t m = PA_VOLUME_MUTED;
163 return pa_cvolume_max(a);
165 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
167 for (c = n = 0; c < a->channels; c++) {
169 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
172 if (a->values[c] > m)
179 pa_volume_t pa_cvolume_min_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
180 pa_volume_t m = PA_VOLUME_MAX;
186 return pa_cvolume_min(a);
188 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
190 for (c = n = 0; c < a->channels; c++) {
192 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
195 if (a->values[c] < m)
202 pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
204 pa_return_val_if_fail(a != PA_VOLUME_INVALID, PA_VOLUME_INVALID);
205 pa_return_val_if_fail(b != PA_VOLUME_INVALID, PA_VOLUME_INVALID);
207 /* cbrt((a/PA_VOLUME_NORM)^3*(b/PA_VOLUME_NORM)^3)*PA_VOLUME_NORM = a*b/PA_VOLUME_NORM */
209 return (pa_volume_t) (((uint64_t) a * (uint64_t) b + (uint64_t) PA_VOLUME_NORM / 2ULL) / (uint64_t) PA_VOLUME_NORM);
212 pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) {
214 pa_return_val_if_fail(a != PA_VOLUME_INVALID, PA_VOLUME_INVALID);
215 pa_return_val_if_fail(b != PA_VOLUME_INVALID, PA_VOLUME_INVALID);
217 if (b <= PA_VOLUME_MUTED)
220 return (pa_volume_t) (((uint64_t) a * (uint64_t) PA_VOLUME_NORM + (uint64_t) b / 2ULL) / (uint64_t) b);
223 /* Amplitude, not power */
224 static double linear_to_dB(double v) {
225 return 20.0 * log10(v);
228 static double dB_to_linear(double v) {
229 return pow(10.0, v / 20.0);
232 pa_volume_t pa_sw_volume_from_dB(double dB) {
233 if (isinf(dB) < 0 || dB <= PA_DECIBEL_MININFTY)
234 return PA_VOLUME_MUTED;
236 return pa_sw_volume_from_linear(dB_to_linear(dB));
239 double pa_sw_volume_to_dB(pa_volume_t v) {
241 pa_return_val_if_fail(v != PA_VOLUME_INVALID, PA_DECIBEL_MININFTY);
243 if (v <= PA_VOLUME_MUTED)
244 return PA_DECIBEL_MININFTY;
246 return linear_to_dB(pa_sw_volume_to_linear(v));
249 pa_volume_t pa_sw_volume_from_linear(double v) {
252 return PA_VOLUME_MUTED;
255 * We use a cubic mapping here, as suggested and discussed here:
257 * http://www.robotplanet.dk/audio/audio_gui_design/
258 * http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-May/thread.html#23151
260 * We make sure that the conversion to linear and back yields the
261 * same volume value! That's why we need the lround() below!
264 return (pa_volume_t) lround(cbrt(v) * PA_VOLUME_NORM);
267 double pa_sw_volume_to_linear(pa_volume_t v) {
270 pa_return_val_if_fail(v != PA_VOLUME_INVALID, 0.0);
272 if (v <= PA_VOLUME_MUTED)
275 if (v == PA_VOLUME_NORM)
278 f = ((double) v / PA_VOLUME_NORM);
283 char *pa_cvolume_snprint(char *s, size_t l, const pa_cvolume *c) {
285 pa_bool_t first = TRUE;
294 if (!pa_cvolume_valid(c)) {
295 pa_snprintf(s, l, _("(invalid)"));
301 for (channel = 0; channel < c->channels && l > 1; channel++) {
302 l -= pa_snprintf(e, l, "%s%u: %3u%%",
305 (c->values[channel]*100+PA_VOLUME_NORM/2)/PA_VOLUME_NORM);
314 char *pa_volume_snprint(char *s, size_t l, pa_volume_t v) {
320 if (v == PA_VOLUME_INVALID) {
321 pa_snprintf(s, l, _("(invalid)"));
325 pa_snprintf(s, l, "%3u%%", (v*100+PA_VOLUME_NORM/2)/PA_VOLUME_NORM);
329 char *pa_sw_cvolume_snprint_dB(char *s, size_t l, const pa_cvolume *c) {
331 pa_bool_t first = TRUE;
340 if (!pa_cvolume_valid(c)) {
341 pa_snprintf(s, l, _("(invalid)"));
347 for (channel = 0; channel < c->channels && l > 1; channel++) {
348 double f = pa_sw_volume_to_dB(c->values[channel]);
350 l -= pa_snprintf(e, l, "%s%u: %0.2f dB",
353 isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
362 char *pa_sw_volume_snprint_dB(char *s, size_t l, pa_volume_t v) {
370 if (v == PA_VOLUME_INVALID) {
371 pa_snprintf(s, l, _("(invalid)"));
375 f = pa_sw_volume_to_dB(v);
376 pa_snprintf(s, l, "%0.2f dB",
377 isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
382 int pa_cvolume_channels_equal_to(const pa_cvolume *a, pa_volume_t v) {
386 pa_return_val_if_fail(pa_cvolume_valid(a), 0);
387 pa_return_val_if_fail(v != PA_VOLUME_INVALID, 0);
389 for (c = 0; c < a->channels; c++)
390 if (a->values[c] != v)
396 pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
403 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
404 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
406 for (i = 0; i < a->channels && i < b->channels; i++)
407 dest->values[i] = pa_sw_volume_multiply(a->values[i], b->values[i]);
409 dest->channels = (uint8_t) i;
414 pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
420 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
421 pa_return_val_if_fail(b != PA_VOLUME_INVALID, NULL);
423 for (i = 0; i < a->channels; i++)
424 dest->values[i] = pa_sw_volume_multiply(a->values[i], b);
426 dest->channels = (uint8_t) i;
431 pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
438 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
439 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
441 for (i = 0; i < a->channels && i < b->channels; i++)
442 dest->values[i] = pa_sw_volume_divide(a->values[i], b->values[i]);
444 dest->channels = (uint8_t) i;
449 pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
455 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
456 pa_return_val_if_fail(b != PA_VOLUME_INVALID, NULL);
458 for (i = 0; i < a->channels; i++)
459 dest->values[i] = pa_sw_volume_divide(a->values[i], b);
461 dest->channels = (uint8_t) i;
466 int pa_cvolume_valid(const pa_cvolume *v) {
471 if (v->channels <= 0 || v->channels > PA_CHANNELS_MAX)
474 for (c = 0; c < v->channels; c++)
475 if (v->values[c] == PA_VOLUME_INVALID)
481 static pa_bool_t on_left(pa_channel_position_t p) {
482 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_LEFT);
485 static pa_bool_t on_right(pa_channel_position_t p) {
486 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_RIGHT);
489 static pa_bool_t on_center(pa_channel_position_t p) {
490 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_CENTER);
493 static pa_bool_t on_lfe(pa_channel_position_t p) {
494 return p == PA_CHANNEL_POSITION_LFE;
497 static pa_bool_t on_front(pa_channel_position_t p) {
498 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_FRONT);
501 static pa_bool_t on_rear(pa_channel_position_t p) {
502 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_REAR);
505 pa_cvolume *pa_cvolume_remap(pa_cvolume *v, const pa_channel_map *from, const pa_channel_map *to) {
513 pa_return_val_if_fail(pa_channel_map_valid(to), NULL);
514 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, from), NULL);
516 if (pa_channel_map_equal(from, to))
519 result.channels = to->channels;
521 for (b = 0; b < to->channels; b++) {
525 for (a = 0; a < from->channels; a++)
526 if (from->map[a] == to->map[b]) {
532 for (a = 0; a < from->channels; a++)
533 if ((on_left(from->map[a]) && on_left(to->map[b])) ||
534 (on_right(from->map[a]) && on_right(to->map[b])) ||
535 (on_center(from->map[a]) && on_center(to->map[b])) ||
536 (on_lfe(from->map[a]) && on_lfe(to->map[b]))) {
544 k = pa_cvolume_avg(v);
548 result.values[b] = k;
555 int pa_cvolume_compatible(const pa_cvolume *v, const pa_sample_spec *ss) {
560 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
561 pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
563 return v->channels == ss->channels;
566 int pa_cvolume_compatible_with_channel_map(const pa_cvolume *v, const pa_channel_map *cm) {
570 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
571 pa_return_val_if_fail(pa_channel_map_valid(cm), 0);
573 return v->channels == cm->channels;
576 static void get_avg_lr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *l, pa_volume_t *r) {
578 pa_volume_t left = 0, right = 0;
579 unsigned n_left = 0, n_right = 0;
583 pa_assert(map->channels == v->channels);
587 for (c = 0; c < map->channels; c++) {
588 if (on_left(map->map[c])) {
589 left += v->values[c];
591 } else if (on_right(map->map[c])) {
592 right += v->values[c];
605 *r = right / n_right;
608 float pa_cvolume_get_balance(const pa_cvolume *v, const pa_channel_map *map) {
609 pa_volume_t left, right;
614 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
616 if (!pa_channel_map_can_balance(map))
619 get_avg_lr(map, v, &left, &right);
634 return -1.0f + ((float) right / (float) left);
636 return 1.0f - ((float) left / (float) right);
639 pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
640 pa_volume_t left, nleft, right, nright, m;
645 pa_assert(new_balance >= -1.0f);
646 pa_assert(new_balance <= 1.0f);
648 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
649 pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
650 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
652 if (!pa_channel_map_can_balance(map))
655 get_avg_lr(map, v, &left, &right);
657 m = PA_MAX(left, right);
659 if (new_balance <= 0) {
660 nright = (new_balance + 1.0f) * m;
663 nleft = (1.0f - new_balance) * m;
667 for (c = 0; c < map->channels; c++) {
668 if (on_left(map->map[c])) {
670 v->values[c] = nleft;
672 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nleft) / (uint64_t) left);
673 } else if (on_right(map->map[c])) {
675 v->values[c] = nright;
677 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
684 pa_cvolume* pa_cvolume_scale(pa_cvolume *v, pa_volume_t max) {
690 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
691 pa_return_val_if_fail(max != PA_VOLUME_INVALID, NULL);
693 t = pa_cvolume_max(v);
695 if (t <= PA_VOLUME_MUTED)
696 return pa_cvolume_set(v, v->channels, max);
698 for (c = 0; c < v->channels; c++)
699 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
704 pa_cvolume* pa_cvolume_scale_mask(pa_cvolume *v, pa_volume_t max, pa_channel_map *cm, pa_channel_position_mask_t mask) {
710 pa_return_val_if_fail(max != PA_VOLUME_INVALID, NULL);
713 return pa_cvolume_scale(v, max);
715 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, cm), NULL);
717 t = pa_cvolume_max_mask(v, cm, mask);
719 if (t <= PA_VOLUME_MUTED)
720 return pa_cvolume_set(v, v->channels, max);
722 for (c = 0; c < v->channels; c++)
723 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
728 static void get_avg_fr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *f, pa_volume_t *r) {
730 pa_volume_t front = 0, rear = 0;
731 unsigned n_front = 0, n_rear = 0;
735 pa_assert(map->channels == v->channels);
739 for (c = 0; c < map->channels; c++) {
740 if (on_front(map->map[c])) {
741 front += v->values[c];
743 } else if (on_rear(map->map[c])) {
744 rear += v->values[c];
752 *f = front / n_front;
760 float pa_cvolume_get_fade(const pa_cvolume *v, const pa_channel_map *map) {
761 pa_volume_t front, rear;
766 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
768 if (!pa_channel_map_can_fade(map))
771 get_avg_fr(map, v, &front, &rear);
777 return -1.0f + ((float) front / (float) rear);
779 return 1.0f - ((float) rear / (float) front);
782 pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade) {
783 pa_volume_t front, nfront, rear, nrear, m;
788 pa_assert(new_fade >= -1.0f);
789 pa_assert(new_fade <= 1.0f);
791 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
792 pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
793 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
795 if (!pa_channel_map_can_fade(map))
798 get_avg_fr(map, v, &front, &rear);
800 m = PA_MAX(front, rear);
803 nfront = (new_fade + 1.0f) * m;
806 nrear = (1.0f - new_fade) * m;
810 for (c = 0; c < map->channels; c++) {
811 if (on_front(map->map[c])) {
813 v->values[c] = nfront;
815 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nfront) / (uint64_t) front);
816 } else if (on_rear(map->map[c])) {
818 v->values[c] = nrear;
820 v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
827 pa_cvolume* pa_cvolume_set_position(
829 const pa_channel_map *map,
830 pa_channel_position_t t,
834 pa_bool_t good = FALSE;
839 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), NULL);
840 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, NULL);
841 pa_return_val_if_fail(v != PA_VOLUME_INVALID, NULL);
843 for (c = 0; c < map->channels; c++)
844 if (map->map[c] == t) {
849 return good ? cv : NULL;
852 pa_volume_t pa_cvolume_get_position(
854 const pa_channel_map *map,
855 pa_channel_position_t t) {
858 pa_volume_t v = PA_VOLUME_MUTED;
863 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), PA_VOLUME_MUTED);
864 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, PA_VOLUME_MUTED);
866 for (c = 0; c < map->channels; c++)
867 if (map->map[c] == t)
868 if (cv->values[c] > v)
874 pa_cvolume* pa_cvolume_merge(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
881 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
882 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
884 for (i = 0; i < a->channels && i < b->channels; i++)
885 dest->values[i] = PA_MAX(a->values[i], b->values[i]);
887 dest->channels = (uint8_t) i;
892 pa_cvolume* pa_cvolume_inc(pa_cvolume *v, pa_volume_t inc) {
897 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
898 pa_return_val_if_fail(inc != PA_VOLUME_INVALID, NULL);
900 m = pa_cvolume_max(v);
902 if (m >= PA_VOLUME_MAX - inc)
907 return pa_cvolume_scale(v, m);
910 pa_cvolume* pa_cvolume_dec(pa_cvolume *v, pa_volume_t dec) {
915 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
916 pa_return_val_if_fail(dec != PA_VOLUME_INVALID, NULL);
918 m = pa_cvolume_max(v);
920 if (m <= PA_VOLUME_MUTED + dec)
925 return pa_cvolume_scale(v, m);