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(pa_channels_valid(channels));
78 a->channels = (uint8_t) channels;
80 for (i = 0; i < a->channels; i++)
81 /* Clamp in case there is stale data that exceeds the current
83 a->values[i] = PA_CLAMP_VOLUME(v);
88 pa_volume_t pa_cvolume_avg(const pa_cvolume *a) {
93 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
95 for (c = 0; c < a->channels; c++)
100 return (pa_volume_t) sum;
103 pa_volume_t pa_cvolume_avg_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
110 return pa_cvolume_avg(a);
112 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
114 for (c = n = 0; c < a->channels; c++) {
116 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
126 return (pa_volume_t) sum;
129 pa_volume_t pa_cvolume_max(const pa_cvolume *a) {
130 pa_volume_t m = PA_VOLUME_MUTED;
134 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
136 for (c = 0; c < a->channels; c++)
137 if (a->values[c] > m)
143 pa_volume_t pa_cvolume_min(const pa_cvolume *a) {
144 pa_volume_t m = PA_VOLUME_MAX;
148 pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
150 for (c = 0; c < a->channels; c++)
151 if (a->values[c] < m)
157 pa_volume_t pa_cvolume_max_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
158 pa_volume_t m = PA_VOLUME_MUTED;
164 return pa_cvolume_max(a);
166 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
168 for (c = 0; c < a->channels; c++) {
170 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
173 if (a->values[c] > m)
180 pa_volume_t pa_cvolume_min_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
181 pa_volume_t m = PA_VOLUME_MAX;
187 return pa_cvolume_min(a);
189 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
191 for (c = 0; c < a->channels; c++) {
193 if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
196 if (a->values[c] < m)
203 pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
205 pa_return_val_if_fail(PA_VOLUME_IS_VALID(a), PA_VOLUME_INVALID);
206 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), PA_VOLUME_INVALID);
208 /* cbrt((a/PA_VOLUME_NORM)^3*(b/PA_VOLUME_NORM)^3)*PA_VOLUME_NORM = a*b/PA_VOLUME_NORM */
210 return (pa_volume_t) PA_CLAMP_VOLUME((((uint64_t) a * (uint64_t) b + (uint64_t) PA_VOLUME_NORM / 2ULL) / (uint64_t) PA_VOLUME_NORM));
213 pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) {
215 pa_return_val_if_fail(PA_VOLUME_IS_VALID(a), PA_VOLUME_INVALID);
216 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), PA_VOLUME_INVALID);
218 if (b <= PA_VOLUME_MUTED)
221 return (pa_volume_t) (((uint64_t) a * (uint64_t) PA_VOLUME_NORM + (uint64_t) b / 2ULL) / (uint64_t) b);
224 /* Amplitude, not power */
225 static double linear_to_dB(double v) {
226 return 20.0 * log10(v);
229 static double dB_to_linear(double v) {
230 return pow(10.0, v / 20.0);
233 pa_volume_t pa_sw_volume_from_dB(double dB) {
234 if (isinf(dB) < 0 || dB <= PA_DECIBEL_MININFTY)
235 return PA_VOLUME_MUTED;
237 return pa_sw_volume_from_linear(dB_to_linear(dB));
240 double pa_sw_volume_to_dB(pa_volume_t v) {
242 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), PA_DECIBEL_MININFTY);
244 if (v <= PA_VOLUME_MUTED)
245 return PA_DECIBEL_MININFTY;
247 return linear_to_dB(pa_sw_volume_to_linear(v));
250 pa_volume_t pa_sw_volume_from_linear(double v) {
253 return PA_VOLUME_MUTED;
256 * We use a cubic mapping here, as suggested and discussed here:
258 * http://www.robotplanet.dk/audio/audio_gui_design/
259 * http://lists.linuxaudio.org/pipermail/linux-audio-dev/2009-May/thread.html#23151
261 * We make sure that the conversion to linear and back yields the
262 * same volume value! That's why we need the lround() below!
265 return (pa_volume_t) PA_CLAMP_VOLUME((uint64_t) lround(cbrt(v) * PA_VOLUME_NORM));
268 double pa_sw_volume_to_linear(pa_volume_t v) {
271 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), 0.0);
273 if (v <= PA_VOLUME_MUTED)
276 if (v == PA_VOLUME_NORM)
279 f = ((double) v / PA_VOLUME_NORM);
284 char *pa_cvolume_snprint(char *s, size_t l, const pa_cvolume *c) {
295 if (!pa_cvolume_valid(c)) {
296 pa_snprintf(s, l, _("(invalid)"));
302 for (channel = 0; channel < c->channels && l > 1; channel++) {
303 l -= pa_snprintf(e, l, "%s%u: %3u%%",
306 (c->values[channel]*100+PA_VOLUME_NORM/2)/PA_VOLUME_NORM);
315 char *pa_volume_snprint(char *s, size_t l, pa_volume_t v) {
321 if (!PA_VOLUME_IS_VALID(v)) {
322 pa_snprintf(s, l, _("(invalid)"));
326 pa_snprintf(s, l, "%3u%%", (v*100+PA_VOLUME_NORM/2)/PA_VOLUME_NORM);
330 char *pa_sw_cvolume_snprint_dB(char *s, size_t l, const pa_cvolume *c) {
341 if (!pa_cvolume_valid(c)) {
342 pa_snprintf(s, l, _("(invalid)"));
348 for (channel = 0; channel < c->channels && l > 1; channel++) {
349 double f = pa_sw_volume_to_dB(c->values[channel]);
351 l -= pa_snprintf(e, l, "%s%u: %0.2f dB",
354 isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
363 char *pa_cvolume_snprint_verbose(char *s, size_t l, const pa_cvolume *c, const pa_channel_map *map, int print_dB) {
373 if (!pa_cvolume_valid(c)) {
374 pa_snprintf(s, l, _("(invalid)"));
378 pa_assert(!map || (map->channels == c->channels));
379 pa_assert(!map || pa_channel_map_valid(map));
383 for (unsigned channel = 0; channel < c->channels && l > 1; channel++) {
384 char channel_position[32];
385 size_t bytes_printed;
386 char buf[PA_VOLUME_SNPRINT_VERBOSE_MAX];
389 pa_snprintf(channel_position, sizeof(channel_position), "%s", pa_channel_position_to_string(map->map[channel]));
391 pa_snprintf(channel_position, sizeof(channel_position), "%u", channel);
393 bytes_printed = pa_snprintf(current, l, "%s%s: %s",
396 pa_volume_snprint_verbose(buf, sizeof(buf), c->values[channel], print_dB));
398 current += bytes_printed;
405 char *pa_sw_volume_snprint_dB(char *s, size_t l, pa_volume_t v) {
413 if (!PA_VOLUME_IS_VALID(v)) {
414 pa_snprintf(s, l, _("(invalid)"));
418 f = pa_sw_volume_to_dB(v);
419 pa_snprintf(s, l, "%0.2f dB", isinf(f) < 0 || f <= PA_DECIBEL_MININFTY ? -INFINITY : f);
424 char *pa_volume_snprint_verbose(char *s, size_t l, pa_volume_t v, int print_dB) {
425 char dB[PA_SW_VOLUME_SNPRINT_DB_MAX];
432 if (!PA_VOLUME_IS_VALID(v)) {
433 pa_snprintf(s, l, _("(invalid)"));
437 pa_snprintf(s, l, "%" PRIu32 " / %3u%%%s%s",
439 (v * 100 + PA_VOLUME_NORM / 2) / PA_VOLUME_NORM,
440 print_dB ? " / " : "",
441 print_dB ? pa_sw_volume_snprint_dB(dB, sizeof(dB), v) : "");
446 int pa_cvolume_channels_equal_to(const pa_cvolume *a, pa_volume_t v) {
450 if (pa_cvolume_valid(a) == 0)
453 /* pa_return_val_if_fail(pa_cvolume_valid(a), 0); */
454 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), 0);
456 for (c = 0; c < a->channels; c++)
457 if (a->values[c] != v)
463 pa_cvolume *pa_sw_cvolume_multiply(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
470 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
471 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
473 for (i = 0; i < a->channels && i < b->channels; i++)
474 dest->values[i] = pa_sw_volume_multiply(a->values[i], b->values[i]);
476 dest->channels = (uint8_t) i;
481 pa_cvolume *pa_sw_cvolume_multiply_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
487 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
488 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), NULL);
490 for (i = 0; i < a->channels; i++)
491 dest->values[i] = pa_sw_volume_multiply(a->values[i], b);
493 dest->channels = (uint8_t) i;
498 pa_cvolume *pa_sw_cvolume_divide(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
505 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
506 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
508 for (i = 0; i < a->channels && i < b->channels; i++)
509 dest->values[i] = pa_sw_volume_divide(a->values[i], b->values[i]);
511 dest->channels = (uint8_t) i;
516 pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
522 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
523 pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), NULL);
525 for (i = 0; i < a->channels; i++)
526 dest->values[i] = pa_sw_volume_divide(a->values[i], b);
528 dest->channels = (uint8_t) i;
533 int pa_cvolume_valid(const pa_cvolume *v) {
538 if (!pa_channels_valid(v->channels))
541 for (c = 0; c < v->channels; c++)
542 if (!PA_VOLUME_IS_VALID(v->values[c]))
548 static bool on_left(pa_channel_position_t p) {
549 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_LEFT);
552 static bool on_right(pa_channel_position_t p) {
553 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_RIGHT);
556 static bool on_center(pa_channel_position_t p) {
557 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_CENTER);
560 static bool on_lfe(pa_channel_position_t p) {
561 return p == PA_CHANNEL_POSITION_LFE;
564 static bool on_front(pa_channel_position_t p) {
565 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_FRONT);
568 static bool on_rear(pa_channel_position_t p) {
569 return !!(PA_CHANNEL_POSITION_MASK(p) & PA_CHANNEL_POSITION_MASK_REAR);
572 pa_cvolume *pa_cvolume_remap(pa_cvolume *v, const pa_channel_map *from, const pa_channel_map *to) {
580 pa_return_val_if_fail(pa_channel_map_valid(to), NULL);
581 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, from), NULL);
583 if (pa_channel_map_equal(from, to))
586 result.channels = to->channels;
588 for (b = 0; b < to->channels; b++) {
592 for (a = 0; a < from->channels; a++)
593 if (from->map[a] == to->map[b]) {
599 for (a = 0; a < from->channels; a++)
600 if ((on_left(from->map[a]) && on_left(to->map[b])) ||
601 (on_right(from->map[a]) && on_right(to->map[b])) ||
602 (on_center(from->map[a]) && on_center(to->map[b])) ||
603 (on_lfe(from->map[a]) && on_lfe(to->map[b]))) {
611 k = pa_cvolume_avg(v);
615 result.values[b] = k;
622 int pa_cvolume_compatible(const pa_cvolume *v, const pa_sample_spec *ss) {
627 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
628 pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
630 return v->channels == ss->channels;
633 int pa_cvolume_compatible_with_channel_map(const pa_cvolume *v, const pa_channel_map *cm) {
637 pa_return_val_if_fail(pa_cvolume_valid(v), 0);
638 pa_return_val_if_fail(pa_channel_map_valid(cm), 0);
640 return v->channels == cm->channels;
643 static void get_avg_lr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *l, pa_volume_t *r) {
645 pa_volume_t left = 0, right = 0;
646 unsigned n_left = 0, n_right = 0;
650 pa_assert(map->channels == v->channels);
654 for (c = 0; c < map->channels; c++) {
655 if (on_left(map->map[c])) {
656 left += v->values[c];
658 } else if (on_right(map->map[c])) {
659 right += v->values[c];
672 *r = right / n_right;
675 float pa_cvolume_get_balance(const pa_cvolume *v, const pa_channel_map *map) {
676 pa_volume_t left, right;
681 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
683 if (!pa_channel_map_can_balance(map))
686 get_avg_lr(map, v, &left, &right);
701 return -1.0f + ((float) right / (float) left);
703 return 1.0f - ((float) left / (float) right);
706 pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
707 pa_volume_t left, nleft, right, nright, m;
713 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
714 pa_return_val_if_fail(new_balance >= -1.0f, NULL);
715 pa_return_val_if_fail(new_balance <= 1.0f, NULL);
717 if (!pa_channel_map_can_balance(map))
720 get_avg_lr(map, v, &left, &right);
722 m = PA_MAX(left, right);
724 if (new_balance <= 0) {
725 nright = (new_balance + 1.0f) * m;
728 nleft = (1.0f - new_balance) * m;
732 for (c = 0; c < map->channels; c++) {
733 if (on_left(map->map[c])) {
735 v->values[c] = nleft;
737 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nleft) / (uint64_t) left);
738 } else if (on_right(map->map[c])) {
740 v->values[c] = nright;
742 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
749 pa_cvolume* pa_cvolume_scale(pa_cvolume *v, pa_volume_t max) {
755 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
756 pa_return_val_if_fail(PA_VOLUME_IS_VALID(max), NULL);
758 t = pa_cvolume_max(v);
760 if (t <= PA_VOLUME_MUTED)
761 return pa_cvolume_set(v, v->channels, max);
763 for (c = 0; c < v->channels; c++)
764 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
769 pa_cvolume* pa_cvolume_scale_mask(pa_cvolume *v, pa_volume_t max, pa_channel_map *cm, pa_channel_position_mask_t mask) {
775 pa_return_val_if_fail(PA_VOLUME_IS_VALID(max), NULL);
778 return pa_cvolume_scale(v, max);
780 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, cm), NULL);
782 t = pa_cvolume_max_mask(v, cm, mask);
784 if (t <= PA_VOLUME_MUTED)
785 return pa_cvolume_set(v, v->channels, max);
787 for (c = 0; c < v->channels; c++)
788 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
793 static void get_avg_fr(const pa_channel_map *map, const pa_cvolume *v, pa_volume_t *f, pa_volume_t *r) {
795 pa_volume_t front = 0, rear = 0;
796 unsigned n_front = 0, n_rear = 0;
800 pa_assert(map->channels == v->channels);
804 for (c = 0; c < map->channels; c++) {
805 if (on_front(map->map[c])) {
806 front += v->values[c];
808 } else if (on_rear(map->map[c])) {
809 rear += v->values[c];
817 *f = front / n_front;
825 float pa_cvolume_get_fade(const pa_cvolume *v, const pa_channel_map *map) {
826 pa_volume_t front, rear;
831 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
833 if (!pa_channel_map_can_fade(map))
836 get_avg_fr(map, v, &front, &rear);
842 return -1.0f + ((float) front / (float) rear);
844 return 1.0f - ((float) rear / (float) front);
847 pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade) {
848 pa_volume_t front, nfront, rear, nrear, m;
854 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
855 pa_return_val_if_fail(new_fade >= -1.0f, NULL);
856 pa_return_val_if_fail(new_fade <= 1.0f, NULL);
858 if (!pa_channel_map_can_fade(map))
861 get_avg_fr(map, v, &front, &rear);
863 m = PA_MAX(front, rear);
866 nfront = (new_fade + 1.0f) * m;
869 nrear = (1.0f - new_fade) * m;
873 for (c = 0; c < map->channels; c++) {
874 if (on_front(map->map[c])) {
876 v->values[c] = nfront;
878 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nfront) / (uint64_t) front);
879 } else if (on_rear(map->map[c])) {
881 v->values[c] = nrear;
883 v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
890 pa_cvolume* pa_cvolume_set_position(
892 const pa_channel_map *map,
893 pa_channel_position_t t,
902 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), NULL);
903 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, NULL);
904 pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), NULL);
906 for (c = 0; c < map->channels; c++)
907 if (map->map[c] == t) {
912 return good ? cv : NULL;
915 pa_volume_t pa_cvolume_get_position(
917 const pa_channel_map *map,
918 pa_channel_position_t t) {
921 pa_volume_t v = PA_VOLUME_MUTED;
926 pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), PA_VOLUME_MUTED);
927 pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, PA_VOLUME_MUTED);
929 for (c = 0; c < map->channels; c++)
930 if (map->map[c] == t)
931 if (cv->values[c] > v)
937 pa_cvolume* pa_cvolume_merge(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
944 pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
945 pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
947 for (i = 0; i < a->channels && i < b->channels; i++)
948 dest->values[i] = PA_MAX(a->values[i], b->values[i]);
950 dest->channels = (uint8_t) i;
955 pa_cvolume* pa_cvolume_inc_clamp(pa_cvolume *v, pa_volume_t inc, pa_volume_t limit) {
960 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
961 pa_return_val_if_fail(PA_VOLUME_IS_VALID(inc), NULL);
963 m = pa_cvolume_max(v);
965 if (m >= limit - inc)
970 return pa_cvolume_scale(v, m);
973 pa_cvolume* pa_cvolume_inc(pa_cvolume *v, pa_volume_t inc) {
974 return pa_cvolume_inc_clamp(v, inc, PA_VOLUME_MAX);
977 pa_cvolume* pa_cvolume_dec(pa_cvolume *v, pa_volume_t dec) {
982 pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
983 pa_return_val_if_fail(PA_VOLUME_IS_VALID(dec), NULL);
985 m = pa_cvolume_max(v);
987 if (m <= PA_VOLUME_MUTED + dec)
992 return pa_cvolume_scale(v, m);
995 int pa_cvolume_ramp_equal(const pa_cvolume_ramp *a, const pa_cvolume_ramp *b) {
1000 if (PA_UNLIKELY(a == b))
1003 if (a->channels != b->channels)
1006 for (i = 0; i < a->channels; i++) {
1007 if (a->ramps[i].type != b->ramps[i].type ||
1008 a->ramps[i].length != b->ramps[i].length ||
1009 a->ramps[i].target != b->ramps[i].target)
1016 pa_cvolume_ramp* pa_cvolume_ramp_init(pa_cvolume_ramp *ramp) {
1023 for (c = 0; c < PA_CHANNELS_MAX; c++) {
1024 ramp->ramps[c].type = PA_VOLUME_RAMP_TYPE_LINEAR;
1025 ramp->ramps[c].length = 0;
1026 ramp->ramps[c].target = PA_VOLUME_INVALID;
1032 pa_cvolume_ramp* pa_cvolume_ramp_set(pa_cvolume_ramp *ramp, unsigned channels, pa_volume_ramp_type_t type, long time, pa_volume_t vol) {
1036 pa_assert(channels > 0);
1037 pa_assert(time >= 0);
1038 pa_assert(channels <= PA_CHANNELS_MAX);
1040 ramp->channels = (uint8_t) channels;
1042 for (i = 0; i < ramp->channels; i++) {
1043 ramp->ramps[i].type = type;
1044 ramp->ramps[i].length = time;
1045 ramp->ramps[i].target = PA_CLAMP_VOLUME(vol);
1051 pa_cvolume_ramp* pa_cvolume_ramp_channel_ramp_set(pa_cvolume_ramp *ramp, unsigned channel, pa_volume_ramp_type_t type, long time, pa_volume_t vol) {
1054 pa_assert(channel <= ramp->channels);
1055 pa_assert(time >= 0);
1057 ramp->ramps[channel].type = type;
1058 ramp->ramps[channel].length = time;
1059 ramp->ramps[channel].target = PA_CLAMP_VOLUME(vol);