mirrors/pulseaudio
1
0
Fork 0
mirror of https://gitlab.freedesktop.org/pulseaudio/pulseaudio.git synced 2025-11-03 09:01:50 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions

add pa_ prefix to all identifiers.

Browse source 
fix downsampling/resampling
add support for U8 samples


git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@49 fefdeb5f-60dc-0310-8127-8f9354f1896f
This commit is contained in:
Lennart Poettering 2004-07-03 23:35:12 +00:00
parent a8a5ab1c79
commit e61c2dddb7
91 changed files with 1795 additions and 1643 deletions
Download patch file Download diff file Expand all files Collapse all files

53
src/sconv.c
View file

@ -1,48 +1,53 @@
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "endianmacros.h"
#include "sconv.h"
static void s16le_to_float32(unsigned n, const void *a, unsigned an, float *b) {
const int16_t *ca = a;
#include "sconv-s16le.h"
#include "sconv-s16be.h"
static void u8_to_float32(unsigned n, const void *a, unsigned an, float *b) {
unsigned i;
const uint8_t *ca = a;
assert(n && a && an && b);
for (; n > 0; n--) {
unsigned i;
float sum = 0;
for (i = 0; i < an; i++) {
int16_t s = *(ca++);
sum += ((float) INT16_FROM_LE(s))/0x7FFF;
uint8_t v = *(ca++);
sum += (((float) v)-127)/127;
}
if (sum > 1)
sum = 1;
if (sum < -1)
sum = -1;
*(b++) = sum;
}
}
}
static void u8_from_float32(unsigned n, const float *a, void *b, unsigned bn) {
unsigned i;
uint8_t *cb = b;
static void s16le_from_float32(unsigned n, const float *a, void *b, unsigned bn) {
int16_t *cb = b;
assert(n && a && b && bn);
for (; n > 0; n--) {
unsigned i;
int16_t s;
float v = *(a++);
uint8_t u;
if (v > 1)
v = 1;
if (v < -1)
v = -1;
s = (int16_t) (v * 0x7FFF);
u = (uint8_t) (v*127+127);
for (i = 0; i < bn; i++)
*(cb++) = INT16_TO_LE(v);
*(cb++) = u;
}
}
@ -76,10 +81,14 @@ static void float32_from_float32(unsigned n, const float *a, void *b, unsigned b
}
}
convert_to_float32_func_t get_convert_to_float32_function(enum pa_sample_format f) {
pa_convert_to_float32_func_t pa_get_convert_to_float32_function(enum pa_sample_format f) {
switch(f) {
case PA_SAMPLE_U8:
return u8_to_float32;
case PA_SAMPLE_S16LE:
return s16le_to_float32;
return pa_sconv_s16le_to_float32;
case PA_SAMPLE_S16BE:
return pa_sconv_s16be_to_float32;
case PA_SAMPLE_FLOAT32:
return float32_to_float32;
default:
@ -87,10 +96,14 @@ convert_to_float32_func_t get_convert_to_float32_function(enum pa_sample_format
}
}
convert_from_float32_func_t get_convert_from_float32_function(enum pa_sample_format f) {
pa_convert_from_float32_func_t pa_get_convert_from_float32_function(enum pa_sample_format f) {
switch(f) {
case PA_SAMPLE_U8:
return u8_from_float32;
case PA_SAMPLE_S16LE:
return s16le_from_float32;
return pa_sconv_s16le_from_float32;
case PA_SAMPLE_S16BE:
return pa_sconv_s16be_from_float32;
case PA_SAMPLE_FLOAT32:
return float32_from_float32;
default: