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
30 #include <pulsecore/core-util.h>
31 #include <pulsecore/i18n.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++)
82 /* Clamp in case there is stale data that exceeds the current
84 a->values[i] = PA_CLAMP_VOLUME(v);
89 pa_volume_t pa_cvolume_avg(const pa_cvolume *a) {
94 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
96 for (c = 0; c < a->channels; c++)
101 return (pa_volume_t) sum;
104 pa_volume_t pa_cvolume_avg_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
111 return pa_cvolume_avg(a);
113 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
115 for (c = n = 0; c < a->channels; c++) {
117 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
127 return (pa_volume_t) sum;
130 pa_volume_t pa_cvolume_max(const pa_cvolume *a) {
131 pa_volume_t m = PA_VOLUME_MUTED;
135 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
137 for (c = 0; c < a->channels; c++)
138 if (a->values[c] > m)
144 pa_volume_t pa_cvolume_min(const pa_cvolume *a) {
145 pa_volume_t m = PA_VOLUME_MAX;
149 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
151 for (c = 0; c < a->channels; c++)
152 if (a->values[c] < m)
158 pa_volume_t pa_cvolume_max_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
159 pa_volume_t m = PA_VOLUME_MUTED;
165 return pa_cvolume_max(a);
167 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
169 for (c = 0; c < a->channels; c++) {
171 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
174 if (a->values[c] > m)
181 pa_volume_t pa_cvolume_min_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
182 pa_volume_t m = PA_VOLUME_MAX;
188 return pa_cvolume_min(a);
190 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
192 for (c = 0; c < a->channels; c++) {
194 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
197 if (a->values[c] < m)
204 pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
206 pa_return_val_if_fail(PA_VOLUME_IS_VALID(a), PA_VOLUME_INVALID);
207 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), PA_VOLUME_INVALID);
209 /* cbrt((a/PA_VOLUME_NORM)^3*(b/PA_VOLUME_NORM)^3)*PA_VOLUME_NORM = a*b/PA_VOLUME_NORM */
211 return (pa_volume_t) PA_CLAMP_VOLUME((((uint64_t) a * (uint64_t) b + (uint64_t) PA_VOLUME_NORM / 2ULL) / (uint64_t) PA_VOLUME_NORM));
214 pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) {
216 pa_return_val_if_fail(PA_VOLUME_IS_VALID(a), PA_VOLUME_INVALID);
217 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), PA_VOLUME_INVALID);
219 if (b <= PA_VOLUME_MUTED)
222 return (pa_volume_t) (((uint64_t) a * (uint64_t) PA_VOLUME_NORM + (uint64_t) b / 2ULL) / (uint64_t) b);
225 /* Amplitude, not power */
226 static double linear_to_dB(double v) {
227 return 20.0 * log10(v);
230 static double dB_to_linear(double v) {
231 return pow(10.0, v / 20.0);
234 pa_volume_t pa_sw_volume_from_dB(double dB) {
235 if (isinf(dB) < 0 || dB <= PA_DECIBEL_MININFTY)
236 return PA_VOLUME_MUTED;
238 return pa_sw_volume_from_linear(dB_to_linear(dB));
241 double pa_sw_volume_to_dB(pa_volume_t v) {
243 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), PA_DECIBEL_MININFTY);
245 if (v <= PA_VOLUME_MUTED)
246 return PA_DECIBEL_MININFTY;
248 return linear_to_dB(pa_sw_volume_to_linear(v));
251 pa_volume_t pa_sw_volume_from_linear(double v) {
254 return PA_VOLUME_MUTED;
257 * We use a cubic mapping here, as suggested and discussed here:
259 * http://www.robotplanet.dk/audio/audio_gui_design/
260 * http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-May/thread.html#23151
262 * We make sure that the conversion to linear and back yields the
263 * same volume value! That's why we need the lround() below!
266 return (pa_volume_t) PA_CLAMP_VOLUME((uint64_t) lround(cbrt(v) * PA_VOLUME_NORM));
269 double pa_sw_volume_to_linear(pa_volume_t v) {
272 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), 0.0);
274 if (v <= PA_VOLUME_MUTED)
277 if (v == PA_VOLUME_NORM)
280 f = ((double) v / PA_VOLUME_NORM);
285 char *pa_cvolume_snprint(char *s, size_t l, const pa_cvolume *c) {
296 if (!pa_cvolume_valid(c)) {
297 pa_snprintf(s, l, _("(invalid)"));
303 for (channel = 0; channel < c->channels && l > 1; channel++) {
304 l -= pa_snprintf(e, l, "%s%u: %3u%%",
307 (c->values[channel]*100+PA_VOLUME_NORM/2)/PA_VOLUME_NORM);
316 char *pa_volume_snprint(char *s, size_t l, pa_volume_t v) {
322 if (!PA_VOLUME_IS_VALID(v)) {
323 pa_snprintf(s, l, _("(invalid)"));
327 pa_snprintf(s, l, "%3u%%", (v*100+PA_VOLUME_NORM/2)/PA_VOLUME_NORM);
331 char *pa_sw_cvolume_snprint_dB(char *s, size_t l, const pa_cvolume *c) {
342 if (!pa_cvolume_valid(c)) {
343 pa_snprintf(s, l, _("(invalid)"));
349 for (channel = 0; channel < c->channels && l > 1; channel++) {
350 double f = pa_sw_volume_to_dB(c->values[channel]);
352 l -= pa_snprintf(e, l, "%s%u: %0.2f dB",
355 isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
364 char *pa_cvolume_snprint_verbose(char *s, size_t l, const pa_cvolume *c, const pa_channel_map *map, int print_dB) {
374 if (!pa_cvolume_valid(c)) {
375 pa_snprintf(s, l, _("(invalid)"));
379 pa_assert(!map || (map->channels == c->channels));
380 pa_assert(!map || pa_channel_map_valid(map));
384 for (unsigned channel = 0; channel < c->channels && l > 1; channel++) {
385 char channel_position[32];
386 size_t bytes_printed;
387 char buf[PA_VOLUME_SNPRINT_VERBOSE_MAX];
390 pa_snprintf(channel_position, sizeof(channel_position), "%s", pa_channel_position_to_string(map->map[channel]));
392 pa_snprintf(channel_position, sizeof(channel_position), "%u", channel);
394 bytes_printed = pa_snprintf(current, l, "%s%s: %s",
397 pa_volume_snprint_verbose(buf, sizeof(buf), c->values[channel], print_dB));
399 current += bytes_printed;
406 char *pa_sw_volume_snprint_dB(char *s, size_t l, pa_volume_t v) {
414 if (!PA_VOLUME_IS_VALID(v)) {
415 pa_snprintf(s, l, _("(invalid)"));
419 f = pa_sw_volume_to_dB(v);
420 pa_snprintf(s, l, "%0.2f dB", isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
425 char *pa_volume_snprint_verbose(char *s, size_t l, pa_volume_t v, int print_dB) {
426 char dB[PA_SW_VOLUME_SNPRINT_DB_MAX];
433 if (!PA_VOLUME_IS_VALID(v)) {
434 pa_snprintf(s, l, _("(invalid)"));
438 pa_snprintf(s, l, "%" PRIu32 " / %3u%%%s%s",
440 (v * 100 + PA_VOLUME_NORM / 2) / PA_VOLUME_NORM,
441 print_dB ? " / " : "",
442 print_dB ? pa_sw_volume_snprint_dB(dB, sizeof(dB), v) : "");
447 int pa_cvolume_channels_equal_to(const pa_cvolume *a, pa_volume_t v) {
451 pa_return_val_if_fail(pa_cvolume_valid(a), 0);
452 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), 0);
454 for (c = 0; c < a->channels; c++)
455 if (a->values[c] != v)
461 pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
468 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
469 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
471 for (i = 0; i < a->channels && i < b->channels; i++)
472 dest->values[i] = pa_sw_volume_multiply(a->values[i], b->values[i]);
474 dest->channels = (uint8_t) i;
479 pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
485 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
486 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), NULL);
488 for (i = 0; i < a->channels; i++)
489 dest->values[i] = pa_sw_volume_multiply(a->values[i], b);
491 dest->channels = (uint8_t) i;
496 pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
503 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
504 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
506 for (i = 0; i < a->channels && i < b->channels; i++)
507 dest->values[i] = pa_sw_volume_divide(a->values[i], b->values[i]);
509 dest->channels = (uint8_t) i;
514 pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
520 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
521 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), NULL);
523 for (i = 0; i < a->channels; i++)
524 dest->values[i] = pa_sw_volume_divide(a->values[i], b);
526 dest->channels = (uint8_t) i;
531 int pa_cvolume_valid(const pa_cvolume *v) {
536 if (v->channels <= 0 || v->channels > PA_CHANNELS_MAX)
539 for (c = 0; c < v->channels; c++)
540 if (!PA_VOLUME_IS_VALID(v->values[c]))
546 static bool on_left(pa_channel_position_t p) {
547 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_LEFT);
550 static bool on_right(pa_channel_position_t p) {
551 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_RIGHT);
554 static bool on_center(pa_channel_position_t p) {
555 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_CENTER);
558 static bool on_lfe(pa_channel_position_t p) {
559 return p == PA_CHANNEL_POSITION_LFE;
562 static bool on_front(pa_channel_position_t p) {
563 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_FRONT);
566 static bool on_rear(pa_channel_position_t p) {
567 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_REAR);
570 pa_cvolume *pa_cvolume_remap(pa_cvolume *v, const pa_channel_map *from, const pa_channel_map *to) {
578 pa_return_val_if_fail(pa_channel_map_valid(to), NULL);
579 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, from), NULL);
581 if (pa_channel_map_equal(from, to))
584 result.channels = to->channels;
586 for (b = 0; b < to->channels; b++) {
590 for (a = 0; a < from->channels; a++)
591 if (from->map[a] == to->map[b]) {
597 for (a = 0; a < from->channels; a++)
598 if ((on_left(from->map[a]) && on_left(to->map[b])) ||
599 (on_right(from->map[a]) && on_right(to->map[b])) ||
600 (on_center(from->map[a]) && on_center(to->map[b])) ||
601 (on_lfe(from->map[a]) && on_lfe(to->map[b]))) {
609 k = pa_cvolume_avg(v);
613 result.values[b] = k;
620 int pa_cvolume_compatible(const pa_cvolume *v, const pa_sample_spec *ss) {
625 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
626 pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
628 return v->channels == ss->channels;
631 int pa_cvolume_compatible_with_channel_map(const pa_cvolume *v, const pa_channel_map *cm) {
635 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
636 pa_return_val_if_fail(pa_channel_map_valid(cm), 0);
638 return v->channels == cm->channels;
641 static void get_avg_lr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *l, pa_volume_t *r) {
643 pa_volume_t left = 0, right = 0;
644 unsigned n_left = 0, n_right = 0;
648 pa_assert(map->channels == v->channels);
652 for (c = 0; c < map->channels; c++) {
653 if (on_left(map->map[c])) {
654 left += v->values[c];
656 } else if (on_right(map->map[c])) {
657 right += v->values[c];
670 *r = right / n_right;
673 float pa_cvolume_get_balance(const pa_cvolume *v, const pa_channel_map *map) {
674 pa_volume_t left, right;
679 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
681 if (!pa_channel_map_can_balance(map))
684 get_avg_lr(map, v, &left, &right);
699 return -1.0f + ((float) right / (float) left);
701 return 1.0f - ((float) left / (float) right);
704 pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
705 pa_volume_t left, nleft, right, nright, m;
711 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
712 pa_return_val_if_fail(new_balance >= -1.0f, NULL);
713 pa_return_val_if_fail(new_balance <= 1.0f, NULL);
715 if (!pa_channel_map_can_balance(map))
718 get_avg_lr(map, v, &left, &right);
720 m = PA_MAX(left, right);
722 if (new_balance <= 0) {
723 nright = (new_balance + 1.0f) * m;
726 nleft = (1.0f - new_balance) * m;
730 for (c = 0; c < map->channels; c++) {
731 if (on_left(map->map[c])) {
733 v->values[c] = nleft;
735 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nleft) / (uint64_t) left);
736 } else if (on_right(map->map[c])) {
738 v->values[c] = nright;
740 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
747 pa_cvolume* pa_cvolume_scale(pa_cvolume *v, pa_volume_t max) {
753 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
754 pa_return_val_if_fail(PA_VOLUME_IS_VALID(max), NULL);
756 t = pa_cvolume_max(v);
758 if (t <= PA_VOLUME_MUTED)
759 return pa_cvolume_set(v, v->channels, max);
761 for (c = 0; c < v->channels; c++)
762 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
767 pa_cvolume* pa_cvolume_scale_mask(pa_cvolume *v, pa_volume_t max, pa_channel_map *cm, pa_channel_position_mask_t mask) {
773 pa_return_val_if_fail(PA_VOLUME_IS_VALID(max), NULL);
776 return pa_cvolume_scale(v, max);
778 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, cm), NULL);
780 t = pa_cvolume_max_mask(v, cm, mask);
782 if (t <= PA_VOLUME_MUTED)
783 return pa_cvolume_set(v, v->channels, max);
785 for (c = 0; c < v->channels; c++)
786 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
791 static void get_avg_fr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *f, pa_volume_t *r) {
793 pa_volume_t front = 0, rear = 0;
794 unsigned n_front = 0, n_rear = 0;
798 pa_assert(map->channels == v->channels);
802 for (c = 0; c < map->channels; c++) {
803 if (on_front(map->map[c])) {
804 front += v->values[c];
806 } else if (on_rear(map->map[c])) {
807 rear += v->values[c];
815 *f = front / n_front;
823 float pa_cvolume_get_fade(const pa_cvolume *v, const pa_channel_map *map) {
824 pa_volume_t front, rear;
829 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
831 if (!pa_channel_map_can_fade(map))
834 get_avg_fr(map, v, &front, &rear);
840 return -1.0f + ((float) front / (float) rear);
842 return 1.0f - ((float) rear / (float) front);
845 pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade) {
846 pa_volume_t front, nfront, rear, nrear, m;
852 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
853 pa_return_val_if_fail(new_fade >= -1.0f, NULL);
854 pa_return_val_if_fail(new_fade <= 1.0f, NULL);
856 if (!pa_channel_map_can_fade(map))
859 get_avg_fr(map, v, &front, &rear);
861 m = PA_MAX(front, rear);
864 nfront = (new_fade + 1.0f) * m;
867 nrear = (1.0f - new_fade) * m;
871 for (c = 0; c < map->channels; c++) {
872 if (on_front(map->map[c])) {
874 v->values[c] = nfront;
876 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nfront) / (uint64_t) front);
877 } else if (on_rear(map->map[c])) {
879 v->values[c] = nrear;
881 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
888 pa_cvolume* pa_cvolume_set_position(
890 const pa_channel_map *map,
891 pa_channel_position_t t,
900 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), NULL);
901 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, NULL);
902 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), NULL);
904 for (c = 0; c < map->channels; c++)
905 if (map->map[c] == t) {
910 return good ? cv : NULL;
913 pa_volume_t pa_cvolume_get_position(
915 const pa_channel_map *map,
916 pa_channel_position_t t) {
919 pa_volume_t v = PA_VOLUME_MUTED;
924 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), PA_VOLUME_MUTED);
925 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, PA_VOLUME_MUTED);
927 for (c = 0; c < map->channels; c++)
928 if (map->map[c] == t)
929 if (cv->values[c] > v)
935 pa_cvolume* pa_cvolume_merge(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
942 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
943 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
945 for (i = 0; i < a->channels && i < b->channels; i++)
946 dest->values[i] = PA_MAX(a->values[i], b->values[i]);
948 dest->channels = (uint8_t) i;
953 pa_cvolume* pa_cvolume_inc_clamp(pa_cvolume *v, pa_volume_t inc, pa_volume_t limit) {
958 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
959 pa_return_val_if_fail(PA_VOLUME_IS_VALID(inc), NULL);
961 m = pa_cvolume_max(v);
963 if (m >= limit - inc)
968 return pa_cvolume_scale(v, m);
971 pa_cvolume* pa_cvolume_inc(pa_cvolume *v, pa_volume_t inc) {
972 return pa_cvolume_inc_clamp(v, inc, PA_VOLUME_MAX);
975 pa_cvolume* pa_cvolume_dec(pa_cvolume *v, pa_volume_t dec) {
980 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
981 pa_return_val_if_fail(PA_VOLUME_IS_VALID(dec), NULL);
983 m = pa_cvolume_max(v);
985 if (m <= PA_VOLUME_MUTED + dec)
990 return pa_cvolume_scale(v, m);