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-rw-r--r--src/pulsecore/sample-util.c138
1 files changed, 69 insertions, 69 deletions
diff --git a/src/pulsecore/sample-util.c b/src/pulsecore/sample-util.c
index a7a5ed8f..ddf72920 100644
--- a/src/pulsecore/sample-util.c
+++ b/src/pulsecore/sample-util.c
@@ -2,17 +2,17 @@
/***
This file is part of PulseAudio.
-
+
PulseAudio is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published
by the Free Software Foundation; either version 2 of the License,
or (at your option) any later version.
-
+
PulseAudio is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
-
+
You should have received a copy of the GNU Lesser General Public License
along with PulseAudio; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
@@ -78,7 +78,7 @@ void pa_silence_memory(void *p, size_t length, const pa_sample_spec *spec) {
default:
assert(0);
}
-
+
memset(p, c, length);
}
@@ -90,42 +90,42 @@ size_t pa_mix(
const pa_sample_spec *spec,
const pa_cvolume *volume,
int mute) {
-
+
assert(streams && data && length && spec);
switch (spec->format) {
case PA_SAMPLE_S16NE:{
size_t d;
unsigned channel = 0;
-
+
for (d = 0;; d += sizeof(int16_t)) {
int32_t sum = 0;
-
+
if (d >= length)
return d;
if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
unsigned i;
-
+
for (i = 0; i < nstreams; i++) {
int32_t v;
pa_volume_t cvolume = streams[i].volume.values[channel];
-
+
if (d >= streams[i].chunk.length)
return d;
-
+
if (cvolume == PA_VOLUME_MUTED)
v = 0;
else {
v = *((int16_t*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d));
-
+
if (cvolume != PA_VOLUME_NORM)
v = (int32_t) (v * pa_sw_volume_to_linear(cvolume));
}
-
+
sum += v;
}
-
+
if (volume->values[channel] != PA_VOLUME_NORM)
sum = (int32_t) (sum * pa_sw_volume_to_linear(volume->values[channel]));
@@ -133,10 +133,10 @@ size_t pa_mix(
if (sum > 0x7FFF) sum = 0x7FFF;
}
-
+
*((int16_t*) data) = sum;
data = (uint8_t*) data + sizeof(int16_t);
-
+
if (++channel >= spec->channels)
channel = 0;
}
@@ -145,35 +145,35 @@ size_t pa_mix(
case PA_SAMPLE_S16RE:{
size_t d;
unsigned channel = 0;
-
+
for (d = 0;; d += sizeof(int16_t)) {
int32_t sum = 0;
-
+
if (d >= length)
return d;
if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
unsigned i;
-
+
for (i = 0; i < nstreams; i++) {
int32_t v;
pa_volume_t cvolume = streams[i].volume.values[channel];
-
+
if (d >= streams[i].chunk.length)
return d;
-
+
if (cvolume == PA_VOLUME_MUTED)
v = 0;
else {
v = INT16_SWAP(*((int16_t*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d)));
-
+
if (cvolume != PA_VOLUME_NORM)
v = (int32_t) (v * pa_sw_volume_to_linear(cvolume));
}
-
+
sum += v;
}
-
+
if (volume->values[channel] != PA_VOLUME_NORM)
sum = (int32_t) (sum * pa_sw_volume_to_linear(volume->values[channel]));
@@ -181,40 +181,40 @@ size_t pa_mix(
if (sum > 0x7FFF) sum = 0x7FFF;
}
-
+
*((int16_t*) data) = INT16_SWAP(sum);
data = (uint8_t*) data + sizeof(int16_t);
-
+
if (++channel >= spec->channels)
channel = 0;
}
}
-
+
case PA_SAMPLE_U8: {
size_t d;
unsigned channel = 0;
-
+
for (d = 0;; d ++) {
int32_t sum = 0;
-
+
if (d >= length)
return d;
if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
unsigned i;
-
+
for (i = 0; i < nstreams; i++) {
int32_t v;
pa_volume_t cvolume = streams[i].volume.values[channel];
-
+
if (d >= streams[i].chunk.length)
return d;
-
+
if (cvolume == PA_VOLUME_MUTED)
v = 0;
else {
v = (int32_t) *((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d) - 0x80;
-
+
if (cvolume != PA_VOLUME_NORM)
v = (int32_t) (v * pa_sw_volume_to_linear(cvolume));
}
@@ -229,51 +229,51 @@ size_t pa_mix(
if (sum > 0x7F) sum = 0x7F;
}
-
+
*((uint8_t*) data) = (uint8_t) (sum + 0x80);
data = (uint8_t*) data + 1;
-
+
if (++channel >= spec->channels)
channel = 0;
}
}
-
+
case PA_SAMPLE_FLOAT32NE: {
size_t d;
unsigned channel = 0;
-
+
for (d = 0;; d += sizeof(float)) {
float sum = 0;
-
+
if (d >= length)
return d;
-
+
if (!mute && volume->values[channel] != PA_VOLUME_MUTED) {
unsigned i;
-
+
for (i = 0; i < nstreams; i++) {
float v;
pa_volume_t cvolume = streams[i].volume.values[channel];
-
+
if (d >= streams[i].chunk.length)
return d;
-
+
if (cvolume == PA_VOLUME_MUTED)
v = 0;
else {
v = *((float*) ((uint8_t*) streams[i].chunk.memblock->data + streams[i].chunk.index + d));
-
+
if (cvolume != PA_VOLUME_NORM)
v *= pa_sw_volume_to_linear(cvolume);
}
-
+
sum += v;
}
-
+
if (volume->values[channel] != PA_VOLUME_NORM)
sum *= pa_sw_volume_to_linear(volume->values[channel]);
}
-
+
*((float*) data) = sum;
data = (uint8_t*) data + sizeof(float);
@@ -281,7 +281,7 @@ size_t pa_mix(
channel = 0;
}
}
-
+
default:
pa_log_error("ERROR: Unable to mix audio data of format %s.", pa_sample_format_to_string(spec->format));
abort();
@@ -310,17 +310,17 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
for (channel = 0; channel < spec->channels; channel++)
linear[channel] = pa_sw_volume_to_linear(volume->values[channel]);
-
+
for (channel = 0, d = (int16_t*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
int32_t t = (int32_t)(*d);
-
+
t = (int32_t) (t * linear[channel]);
-
+
if (t < -0x8000) t = -0x8000;
if (t > 0x7FFF) t = 0x7FFF;
-
+
*d = (int16_t) t;
-
+
if (++channel >= spec->channels)
channel = 0;
}
@@ -332,66 +332,66 @@ void pa_volume_memchunk(pa_memchunk*c, const pa_sample_spec *spec, const pa_cvol
size_t n;
unsigned channel;
double linear[PA_CHANNELS_MAX];
-
+
for (channel = 0; channel < spec->channels; channel++)
linear[channel] = pa_sw_volume_to_linear(volume->values[channel]);
-
+
for (channel = 0, d = (int16_t*) ((uint8_t*) c->memblock->data+c->index), n = c->length/sizeof(int16_t); n > 0; d++, n--) {
int32_t t = (int32_t)(INT16_SWAP(*d));
-
+
t = (int32_t) (t * linear[channel]);
-
+
if (t < -0x8000) t = -0x8000;
if (t > 0x7FFF) t = 0x7FFF;
-
+
*d = INT16_SWAP((int16_t) t);
-
+
if (++channel >= spec->channels)
channel = 0;
}
break;
}
-
+
case PA_SAMPLE_U8: {
uint8_t *d;
size_t n;
unsigned channel = 0;
-
+
for (d = (uint8_t*) c->memblock->data + c->index, n = c->length; n > 0; d++, n--) {
int32_t t = (int32_t) *d - 0x80;
-
+
t = (int32_t) (t * pa_sw_volume_to_linear(volume->values[channel]));
-
+
if (t < -0x80) t = -0x80;
if (t > 0x7F) t = 0x7F;
-
+
*d = (uint8_t) (t + 0x80);
-
+
if (++channel >= spec->channels)
channel = 0;
}
break;
}
-
+
case PA_SAMPLE_FLOAT32NE: {
float *d;
int skip;
unsigned n;
unsigned channel;
-
+
d = (float*) ((uint8_t*) c->memblock->data + c->index);
skip = spec->channels * sizeof(float);
n = c->length/sizeof(float)/spec->channels;
-
+
for (channel = 0; channel < spec->channels ; channel ++) {
float v, *t;
-
+
if (volume->values[channel] == PA_VOLUME_NORM)
continue;
-
+
v = (float) pa_sw_volume_to_linear(volume->values[channel]);
-
+
t = d + channel;
oil_scalarmult_f32(t, skip, t, skip, &v, n);
}