int pa_cvolume_compatible_with_channel_map(const pa_cvolume *v, const pa_channel_map *cm) {
pa_assert(v);
pa_assert(cm);
pa_return_val_if_fail(pa_cvolume_valid(v), 0);
pa_return_val_if_fail(pa_channel_map_valid(cm), 0);
return v->channels == cm->channels;
}
pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
pa_return_val_if_fail(a != PA_VOLUME_INVALID, PA_VOLUME_INVALID);
pa_return_val_if_fail(b != PA_VOLUME_INVALID, PA_VOLUME_INVALID);
/* cbrt((a/PA_VOLUME_NORM)^3*(b/PA_VOLUME_NORM)^3)*PA_VOLUME_NORM = a*b/PA_VOLUME_NORM */
return (pa_volume_t) (((uint64_t) a * (uint64_t) b + (uint64_t) PA_VOLUME_NORM / 2ULL) / (uint64_t) PA_VOLUME_NORM);
}
pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
pa_return_val_if_fail(PA_VOLUME_IS_VALID(a), PA_VOLUME_INVALID);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), PA_VOLUME_INVALID);
/* cbrt((a/PA_VOLUME_NORM)^3*(b/PA_VOLUME_NORM)^3)*PA_VOLUME_NORM = a*b/PA_VOLUME_NORM */
return (pa_volume_t) PA_CLAMP_VOLUME((((uint64_t) a * (uint64_t) b + (uint64_t) PA_VOLUME_NORM / 2ULL) / (uint64_t) PA_VOLUME_NORM));
}
int pa_channel_map_compatible(const pa_channel_map *map, const pa_sample_spec *ss) {
pa_assert(map);
pa_assert(ss);
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
return map->channels == ss->channels;
}
pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) {
pa_return_val_if_fail(PA_VOLUME_IS_VALID(a), PA_VOLUME_INVALID);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), PA_VOLUME_INVALID);
if (b <= PA_VOLUME_MUTED)
return 0;
return (pa_volume_t) (((uint64_t) a * (uint64_t) PA_VOLUME_NORM + (uint64_t) b / 2ULL) / (uint64_t) b);
}
int pa_cvolume_compatible(const pa_cvolume *v, const pa_sample_spec *ss) {
pa_assert(v);
pa_assert(ss);
pa_return_val_if_fail(pa_cvolume_valid(v), 0);
pa_return_val_if_fail(pa_sample_spec_valid(ss), 0);
return v->channels == ss->channels;
}
int pa_channel_map_has_position(const pa_channel_map *map, pa_channel_position_t p) {
unsigned c;
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
pa_return_val_if_fail(p < PA_CHANNEL_POSITION_MAX, 0);
for (c = 0; c < map->channels; c++)
if (map->map[c] == p)
return 1;
return 0;
}
pa_cvolume* pa_cvolume_set_lfe_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
pa_assert(map);
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
pa_return_val_if_fail(new_balance >= -1.0f, NULL);
pa_return_val_if_fail(new_balance <= 1.0f, NULL);
if (!pa_channel_map_can_lfe_balance(map))
return v;
return set_balance(v, map, new_balance, on_hfe, on_lfe);
}
int pa_cvolume_channels_equal_to(const pa_cvolume *a, pa_volume_t v) {
unsigned c;
pa_assert(a);
pa_return_val_if_fail(pa_cvolume_valid(a), 0);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), 0);
for (c = 0; c < a->channels; c++)
if (a->values[c] != v)
return 0;
return 1;
}
pa_cvolume *pa_cvolume_remap(pa_cvolume *v, const pa_channel_map *from, const pa_channel_map *to) {
int a, b;
pa_cvolume result;
pa_assert(v);
pa_assert(from);
pa_assert(to);
pa_return_val_if_fail(pa_channel_map_valid(to), NULL);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, from), NULL);
if (pa_channel_map_equal(from, to))
return v;
result.channels = to->channels;
for (b = 0; b < to->channels; b++) {
pa_volume_t k = 0;
int n = 0;
for (a = 0; a < from->channels; a++)
if (from->map[a] == to->map[b]) {
k += v->values[a];
n ++;
}
if (n <= 0) {
for (a = 0; a < from->channels; a++)
if ((on_left(from->map[a]) && on_left(to->map[b])) ||
(on_right(from->map[a]) && on_right(to->map[b])) ||
(on_center(from->map[a]) && on_center(to->map[b])) ||
(on_lfe(from->map[a]) && on_lfe(to->map[b]))) {
k += v->values[a];
n ++;
}
}
if (n <= 0)
k = pa_cvolume_avg(v);
else
k /= n;
result.values[b] = k;
}
*v = result;
return v;
}
pa_volume_t pa_cvolume_avg_mask(const pa_cvolume *a, const pa_channel_map *cm, pa_channel_position_mask_t mask) {
uint64_t sum = 0;
unsigned c, n;
pa_assert(a);
if (!cm)
return pa_cvolume_avg(a);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(a, cm), PA_VOLUME_MUTED);
for (c = n = 0; c < a->channels; c++) {
if (!(PA_CHANNEL_POSITION_MASK(cm->map[c]) & mask))
continue;
sum += a->values[c];
n ++;
}
if (n > 0)
sum /= n;
return (pa_volume_t) sum;
}
pa_cvolume *pa_sw_cvolume_divide_scalar(pa_cvolume *dest, const pa_cvolume *a, pa_volume_t b) {
unsigned i;
pa_assert(dest);
pa_assert(a);
pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(b), NULL);
for (i = 0; i < a->channels; i++)
dest->values[i] = pa_sw_volume_divide(a->values[i], b);
dest->channels = (uint8_t) i;
return dest;
}
float pa_cvolume_get_balance(const pa_cvolume *v, const pa_channel_map *map) {
pa_volume_t left, right;
pa_assert(v);
pa_assert(map);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), 0.0f);
if (!pa_channel_map_can_balance(map))
return 0.0f;
get_avg_lr(map, v, &left, &right);
if (left == right)
return 0.0f;
/* 1.0, 0.0 => -1.0
0.0, 1.0 => 1.0
0.0, 0.0 => 0.0
0.5, 0.5 => 0.0
1.0, 0.5 => -0.5
1.0, 0.25 => -0.75
0.75, 0.25 => -0.66
0.5, 0.25 => -0.5 */
if (left > right)
return -1.0f + ((float) right / (float) left);
else
return 1.0f - ((float) left / (float) right);
}
pa_cvolume* pa_cvolume_dec(pa_cvolume *v, pa_volume_t dec) {
pa_volume_t m;
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(dec), NULL);
m = pa_cvolume_max(v);
if (m <= PA_VOLUME_MUTED + dec)
m = PA_VOLUME_MUTED;
else
m -= dec;
return pa_cvolume_scale(v, m);
}
pa_cvolume* pa_cvolume_merge(pa_cvolume *dest, const pa_cvolume *a, const pa_cvolume *b) {
unsigned i;
pa_assert(dest);
pa_assert(a);
pa_assert(b);
pa_return_val_if_fail(pa_cvolume_valid(a), NULL);
pa_return_val_if_fail(pa_cvolume_valid(b), NULL);
for (i = 0; i < a->channels && i < b->channels; i++)
dest->values[i] = PA_MAX(a->values[i], b->values[i]);
dest->channels = (uint8_t) i;
return dest;
}
pa_cvolume* pa_cvolume_inc_clamp(pa_cvolume *v, pa_volume_t inc, pa_volume_t limit) {
pa_volume_t m;
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(inc), NULL);
m = pa_cvolume_max(v);
if (m >= limit - inc)
m = limit;
else
m += inc;
return pa_cvolume_scale(v, m);
}
double pa_sw_volume_to_dB(pa_volume_t v) {
pa_return_val_if_fail(PA_VOLUME_IS_VALID(v), PA_DECIBEL_MININFTY);
if (v <= PA_VOLUME_MUTED)
return PA_DECIBEL_MININFTY;
return linear_to_dB(pa_sw_volume_to_linear(v));
}
/* For compressed streams */
pa_bool_t pa_format_info_to_sample_spec_fake(pa_format_info *f, pa_sample_spec *ss) {
int rate;
pa_assert(f);
pa_assert(ss);
pa_return_val_if_fail(f->encoding != PA_ENCODING_PCM, FALSE);
ss->format = PA_SAMPLE_S16LE;
ss->channels = 2;
pa_return_val_if_fail(pa_format_info_get_prop_int(f, PA_PROP_FORMAT_RATE, &rate), FALSE);
ss->rate = (uint32_t) rate;
if (f->encoding == PA_ENCODING_EAC3_IEC61937)
ss->rate *= 4;
return TRUE;
}
int pa_channel_map_superset(const pa_channel_map *a, const pa_channel_map *b) {
pa_channel_position_mask_t am, bm;
pa_assert(a);
pa_assert(b);
pa_return_val_if_fail(pa_channel_map_valid(a), 0);
if (PA_UNLIKELY(a == b))
return 1;
pa_return_val_if_fail(pa_channel_map_valid(b), 0);
am = pa_channel_map_mask(a);
bm = pa_channel_map_mask(b);
return (bm & am) == bm;
}
pa_cvolume* pa_cvolume_scale(pa_cvolume *v, pa_volume_t max) {
unsigned c;
pa_volume_t t = 0;
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_valid(v), NULL);
pa_return_val_if_fail(PA_VOLUME_IS_VALID(max), NULL);
t = pa_cvolume_max(v);
if (t <= PA_VOLUME_MUTED)
return pa_cvolume_set(v, v->channels, max);
for (c = 0; c < v->channels; c++)
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
return v;
}
const char* pa_channel_map_to_pretty_name(const pa_channel_map *map) {
pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
unsigned c;
pa_assert(map);
pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
memset(in_map, 0, sizeof(in_map));
for (c = 0; c < map->channels; c++)
pa_bitset_set(in_map, map->map[c], TRUE);
pa_init_i18n();
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_MONO, -1))
return _("Mono");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
return _("Stereo");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
return _("Surround 4.0");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_LFE, -1))
return _("Surround 4.1");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, -1))
return _("Surround 5.0");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
return _("Surround 5.1");
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
return _("Surround 7.1");
return NULL;
}
pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float new_fade) {
pa_volume_t front, nfront, rear, nrear, m;
unsigned c;
pa_assert(map);
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
pa_return_val_if_fail(new_fade >= -1.0f, NULL);
pa_return_val_if_fail(new_fade <= 1.0f, NULL);
if (!pa_channel_map_can_fade(map))
return v;
get_avg_fr(map, v, &front, &rear);
m = PA_MAX(front, rear);
if (new_fade <= 0) {
nfront = (new_fade + 1.0f) * m;
nrear = m;
} else {
nrear = (1.0f - new_fade) * m;
nfront = m;
}
for (c = 0; c < map->channels; c++) {
if (on_front(map->map[c])) {
if (front == 0)
v->values[c] = nfront;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nfront) / (uint64_t) front);
} else if (on_rear(map->map[c])) {
if (rear == 0)
v->values[c] = nrear;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
}
}
return v;
}
pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, float new_balance) {
pa_volume_t left, nleft, right, nright, m;
unsigned c;
pa_assert(map);
pa_assert(v);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(v, map), NULL);
pa_return_val_if_fail(new_balance >= -1.0f, NULL);
pa_return_val_if_fail(new_balance <= 1.0f, NULL);
if (!pa_channel_map_can_balance(map))
return v;
get_avg_lr(map, v, &left, &right);
m = PA_MAX(left, right);
if (new_balance <= 0) {
nright = (new_balance + 1.0f) * m;
nleft = m;
} else {
nleft = (1.0f - new_balance) * m;
nright = m;
}
for (c = 0; c < map->channels; c++) {
if (on_left(map->map[c])) {
if (left == 0)
v->values[c] = nleft;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nleft) / (uint64_t) left);
} else if (on_right(map->map[c])) {
if (right == 0)
v->values[c] = nright;
else
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
}
}
return v;
}
pa_channel_position_mask_t pa_channel_map_mask(const pa_channel_map *map) {
unsigned c;
pa_channel_position_mask_t r = 0;
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
for (c = 0; c < map->channels; c++)
r |= PA_CHANNEL_POSITION_MASK(map->map[c]);
return r;
}
pa_volume_t pa_cvolume_get_position(
pa_cvolume *cv,
const pa_channel_map *map,
pa_channel_position_t t) {
unsigned c;
pa_volume_t v = PA_VOLUME_MUTED;
pa_assert(cv);
pa_assert(map);
pa_return_val_if_fail(pa_cvolume_compatible_with_channel_map(cv, map), PA_VOLUME_MUTED);
pa_return_val_if_fail(t < PA_CHANNEL_POSITION_MAX, PA_VOLUME_MUTED);
for (c = 0; c < map->channels; c++)
if (map->map[c] == t)
if (cv->values[c] > v)
v = cv->values[c];
return v;
}
int pa_channel_map_can_fade(const pa_channel_map *map) {
pa_channel_position_mask_t m;
pa_assert(map);
pa_return_val_if_fail(pa_channel_map_valid(map), 0);
m = pa_channel_map_mask(map);
return
(PA_CHANNEL_POSITION_MASK_FRONT & m) &&
(PA_CHANNEL_POSITION_MASK_REAR & m);
}
const char* pa_channel_map_to_name(const pa_channel_map *map) {
pa_bitset_t in_map[PA_BITSET_ELEMENTS(PA_CHANNEL_POSITION_MAX)];
unsigned c;
pa_assert(map);
pa_return_val_if_fail(pa_channel_map_valid(map), NULL);
memset(in_map, 0, sizeof(in_map));
for (c = 0; c < map->channels; c++)
pa_bitset_set(in_map, map->map[c], TRUE);
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_MONO, -1))
return "mono";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_LEFT, PA_CHANNEL_POSITION_RIGHT, -1))
return "stereo";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT, -1))
return "surround-40";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_LFE, -1))
return "surround-41";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, -1))
return "surround-50";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE, -1))
return "surround-51";
if (pa_bitset_equals(in_map, PA_CHANNEL_POSITION_MAX,
PA_CHANNEL_POSITION_FRONT_LEFT, PA_CHANNEL_POSITION_FRONT_RIGHT,
PA_CHANNEL_POSITION_REAR_LEFT, PA_CHANNEL_POSITION_REAR_RIGHT,
PA_CHANNEL_POSITION_FRONT_CENTER, PA_CHANNEL_POSITION_LFE,
PA_CHANNEL_POSITION_SIDE_LEFT, PA_CHANNEL_POSITION_SIDE_RIGHT, -1))
return "surround-71";
return NULL;
}
pa_bool_t pa_format_info_get_prop_int(pa_format_info *f, const char *key, int *v) {
const char *str;
json_object *o;
pa_assert(f);
pa_assert(key);
pa_assert(v);
pa_return_val_if_fail(str = pa_proplist_gets(f->plist, key), FALSE);
o = json_tokener_parse(str);
pa_return_val_if_fail(!is_error(o), FALSE);
if (json_object_get_type(o) != json_type_int) {
json_object_put(o);
return FALSE;
}
*v = json_object_get_int(o);
json_object_put(o);
return TRUE;
}
int pa_cvolume_equal(const pa_cvolume *a, const pa_cvolume *b) {
int i;
pa_assert(a);
pa_assert(b);
pa_return_val_if_fail(pa_cvolume_valid(a), 0);
if (PA_UNLIKELY(a == b))
return 1;
pa_return_val_if_fail(pa_cvolume_valid(b), 0);
if (a->channels != b->channels)
return 0;
for (i = 0; i < a->channels; i++)
if (a->values[i] != b->values[i])
return 0;
return 1;
}
pa_volume_t pa_cvolume_min(const pa_cvolume *a) {
pa_volume_t m = PA_VOLUME_MAX;
unsigned c;
pa_assert(a);
pa_return_val_if_fail(pa_cvolume_valid(a), PA_VOLUME_MUTED);
for (c = 0; c < a->channels; c++)
if (a->values[c] < m)
m = a->values[c];
return m;
}
