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volume: Clamp volume to PA_VOLUME_MAX

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This ensures that we always clamp the volume to PA_VOLUME_MAX. While
this currently has no effect, it will be required for making sure we
don't exceed PA_VOLUME_MAX when its value changes in the future.
This commit is contained in:
Arun Raghavan 2010-10-09 15:38:43 +05:30
parent 1d2ef7923d
commit 49101fc540
7 changed files with 24 additions and 19 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/modules/module-lirc.c
View file

@ -172,7 +172,7 @@ fail:
int pa__init(pa_module*m) {
pa_modargs *ma = NULL;
struct userdata *u;
pa_volume_t volume_limit = PA_VOLUME_NORM*3/2;
pa_volume_t volume_limit = PA_CLAMP_VOLUME(PA_VOLUME_NORM*3/2);
pa_volume_t volume_step = PA_VOLUME_NORM/20;
pa_assert(m);
@ -199,8 +199,8 @@ int pa__init(pa_module*m) {
u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
u->lirc_fd = -1;
u->mute_toggle_save = 0;
u->volume_limit = volume_limit;
u->volume_step = volume_step;
u->volume_limit = PA_CLAMP_VOLUME(volume_limit);
u->volume_step = PA_CLAMP_VOLUME(volume_step);
if ((u->lirc_fd = lirc_init((char*) pa_modargs_get_value(ma, "appname", "pulseaudio"), 1)) < 0) {
pa_log("lirc_init() failed.");

2
src/modules/module-match.c
View file

@ -127,7 +127,7 @@ static int load_rules(struct userdata *u, const char *filename) {
*d = 0;
if (pa_atou(v, &k) >= 0) {
volume = (pa_volume_t) k;
volume = (pa_volume_t) PA_CLAMP_VOLUME(k);
} else if (*v == '"') {
char *e;

4
src/modules/module-mmkbd-evdev.c
View file

@ -188,8 +188,8 @@ int pa__init(pa_module*m) {
u->sink_name = pa_xstrdup(pa_modargs_get_value(ma, "sink", NULL));
u->fd = -1;
u->fd_type = 0;
u->volume_limit = volume_limit;
u->volume_step = volume_step;
u->volume_limit = PA_CLAMP_VOLUME(volume_limit);
u->volume_step = PA_CLAMP_VOLUME(volume_step);
if ((u->fd = pa_open_cloexec(pa_modargs_get_value(ma, "device", DEFAULT_DEVICE), O_RDONLY, 0)) < 0) {
pa_log("Failed to open evdev device: %s", pa_cstrerror(errno));

4
src/modules/module-waveout.c
View file

@ -359,8 +359,8 @@ static int sink_get_hw_volume_cb(pa_sink *s) {
if (waveOutGetVolume(u->hwo, &vol) != MMSYSERR_NOERROR)
return -1;
left = (vol & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME;
right = ((vol >> 16) & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME;
left = PA_CLAMP_VOLUME((vol & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME);
right = PA_CLAMP_VOLUME(((vol >> 16) & 0xFFFF) * PA_VOLUME_NORM / WAVEOUT_MAX_VOLUME);
/* Windows supports > 2 channels, except for volume control */
if (s->hw_volume.channels > 2)

4
src/modules/oss/oss-util.c
View file

@ -271,10 +271,10 @@ int pa_oss_get_volume(int fd, unsigned long mixer, const pa_sample_spec *ss, pa_
pa_cvolume_reset(volume, ss->channels);
volume->values[0] = ((vol & 0xFF) * PA_VOLUME_NORM) / 100;
volume->values[0] = PA_CLAMP_VOLUME(((vol & 0xFF) * PA_VOLUME_NORM) / 100);
if (volume->channels >= 2)
volume->values[1] = (((vol >> 8) & 0xFF) * PA_VOLUME_NORM) / 100;
volume->values[1] = PA_CLAMP_VOLUME((((vol >> 8) & 0xFF) * PA_VOLUME_NORM) / 100);
pa_log_debug("Read mixer settings: %s", pa_cvolume_snprint(cv, sizeof(cv), volume));
return 0;

20
src/pulse/volume.c
View file

@ -79,7 +79,9 @@ pa_cvolume* pa_cvolume_set(pa_cvolume *a, unsigned channels, pa_volume_t v) {
a->channels = (uint8_t) channels;
for (i = 0; i < a->channels; i++)
a->values[i] = v;
/* Clamp in case there is stale data that exceeds the current
* PA_VOLUME_MAX */
a->values[i] = PA_CLAMP_VOLUME(v);
return a;
}
@ -206,7 +208,7 @@ pa_volume_t pa_sw_volume_multiply(pa_volume_t a, pa_volume_t b) {
/* 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);
return (pa_volume_t) PA_CLAMP_VOLUME((((uint64_t) a * (uint64_t) b + (uint64_t) PA_VOLUME_NORM / 2ULL) / (uint64_t) PA_VOLUME_NORM));
}
pa_volume_t pa_sw_volume_divide(pa_volume_t a, pa_volume_t b) {
@ -261,7 +263,7 @@ pa_volume_t pa_sw_volume_from_linear(double v) {
* same volume value! That's why we need the lround() below!
*/
return (pa_volume_t) lround(cbrt(v) * PA_VOLUME_NORM);
return (pa_volume_t) PA_CLAMP_VOLUME(lround(cbrt(v) * PA_VOLUME_NORM));
}
double pa_sw_volume_to_linear(pa_volume_t v) {
@ -667,12 +669,12 @@ pa_cvolume* pa_cvolume_set_balance(pa_cvolume *v, const pa_channel_map *map, flo
if (left == 0)
v->values[c] = nleft;
else
v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nleft) / (uint64_t) left);
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) (((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nright) / (uint64_t) right);
}
}
@ -694,7 +696,7 @@ pa_cvolume* pa_cvolume_scale(pa_cvolume *v, pa_volume_t max) {
return pa_cvolume_set(v, v->channels, max);
for (c = 0; c < v->channels; c++)
v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
return v;
}
@ -718,7 +720,7 @@ pa_cvolume* pa_cvolume_scale_mask(pa_cvolume *v, pa_volume_t max, pa_channel_map
return pa_cvolume_set(v, v->channels, max);
for (c = 0; c < v->channels; c++)
v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) max) / (uint64_t) t);
return v;
}
@ -808,12 +810,12 @@ pa_cvolume* pa_cvolume_set_fade(pa_cvolume *v, const pa_channel_map *map, float
if (front == 0)
v->values[c] = nfront;
else
v->values[c] = (pa_volume_t) (((uint64_t) v->values[c] * (uint64_t) nfront) / (uint64_t) front);
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) (((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
v->values[c] = (pa_volume_t) PA_CLAMP_VOLUME(((uint64_t) v->values[c] * (uint64_t) nrear) / (uint64_t) rear);
}
}

3
src/pulse/volume.h
View file

@ -121,6 +121,9 @@ typedef uint32_t pa_volume_t;
/** Check if volume is valid. \since 0.9.22 */
#define PA_VOLUME_IS_VALID(v) ((v) <= PA_VOLUME_MAX)
/** Clamp volume to the permitted range. \since 0.9.22 */
#define PA_CLAMP_VOLUME(v) (PA_CLAMP_UNLIKELY((v), PA_VOLUME_MUTED, PA_VOLUME_MAX))
/** A structure encapsulating a per-channel volume */
typedef struct pa_cvolume {
uint8_t channels; /**< Number of channels */