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git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@416 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale
2006-01-20 00:40:29 +00:00
parent e528c4df33
commit 42383b1f15
12 changed files with 468 additions and 471 deletions
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71
src/switch_resample.c
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@@ -49,9 +49,7 @@
SWITCH_DECLARE(switch_status) switch_resample_create(switch_audio_resampler **new_resampler,
int from_rate,
size_t from_size,
int to_rate,
size_t to_size,
switch_memory_pool *pool)
int to_rate, size_t to_size, switch_memory_pool *pool)
{
switch_audio_resampler *resampler;
@@ -61,10 +59,11 @@ SWITCH_DECLARE(switch_status) switch_resample_create(switch_audio_resampler **ne
resampler->from_rate = from_rate;
resampler->to_rate = to_rate;
resampler->factor = ((double)resampler->to_rate / (double)resampler->from_rate);
resampler->factor = ((double) resampler->to_rate / (double) resampler->from_rate);
resampler->resampler = resample_open(QUALITY, resampler->factor, resampler->factor);
switch_console_printf(SWITCH_CHANNEL_CONSOLE, "Activate Resampler %d->%d %f\n", resampler->from_rate, resampler->to_rate, resampler->factor);
switch_console_printf(SWITCH_CHANNEL_CONSOLE, "Activate Resampler %d->%d %f\n", resampler->from_rate,
resampler->to_rate, resampler->factor);
resampler->from_size = from_size;
resampler->from = (float *) switch_core_alloc(pool, resampler->from_size);
resampler->to_size = to_size;
@@ -75,14 +74,16 @@ SWITCH_DECLARE(switch_status) switch_resample_create(switch_audio_resampler **ne
}
SWITCH_DECLARE(int) switch_resample_process(switch_audio_resampler *resampler, float *src, int srclen, float *dst, int dstlen, int last)
SWITCH_DECLARE(int) switch_resample_process(switch_audio_resampler *resampler, float *src, int srclen, float *dst,
int dstlen, int last)
{
int o=0, srcused=0, srcpos=0, out=0;
int o = 0, srcused = 0, srcpos = 0, out = 0;
for(;;) {
int srcBlock = MIN(srclen-srcpos, srclen);
int lastFlag = (last && (srcBlock == srclen-srcpos));
o = resample_process(resampler->resampler, resampler->factor, &src[srcpos], srcBlock, lastFlag, &srcused, &dst[out], dstlen-out);
for (;;) {
int srcBlock = MIN(srclen - srcpos, srclen);
int lastFlag = (last && (srcBlock == srclen - srcpos));
o = resample_process(resampler->resampler, resampler->factor, &src[srcpos], srcBlock, lastFlag, &srcused,
&dst[out], dstlen - out);
//printf("resampling %d/%d (%d) %d %f\n", srcpos, srclen, MIN(dstlen-out, dstlen), srcused, factor);
srcpos += srcused;
@@ -106,15 +107,17 @@ SWITCH_DECLARE(size_t) switch_float_to_short(float *f, short *s, size_t len)
{
size_t i;
float ft;
for(i=0;i<len;i++) {
for (i = 0; i < len; i++) {
ft = f[i] * NORMFACT;
if(ft >= 0) {
s[i] = (short)(ft+0.5);
if (ft >= 0) {
s[i] = (short) (ft + 0.5);
} else {
s[i] = (short)(ft-0.5);
s[i] = (short) (ft - 0.5);
}
if ((float)s[i] > MAXSAMPLE) s[i] = (short)MAXSAMPLE;
if (s[i] < (short)-MAXSAMPLE) s[i] = (short)-MAXSAMPLE;
if ((float) s[i] > MAXSAMPLE)
s[i] = (short) MAXSAMPLE;
if (s[i] < (short) -MAXSAMPLE)
s[i] = (short) -MAXSAMPLE;
}
return len;
}
@@ -124,16 +127,18 @@ SWITCH_DECLARE(int) switch_char_to_float(char *c, float *f, int len)
int i;
if (len % 2) {
return(-1);
return (-1);
}
for(i=1;i<len;i+=2) {
f[(int)(i/2)] = (float)(((c[i])*0x100) + c[i-1]);
f[(int)(i/2)] /= NORMFACT;
if (f[(int)(i/2)] > MAXSAMPLE) f[(int)(i/2)] = MAXSAMPLE;
if (f[(int)(i/2)] < -MAXSAMPLE) f[(int)(i/2)] = -MAXSAMPLE;
for (i = 1; i < len; i += 2) {
f[(int) (i / 2)] = (float) (((c[i]) * 0x100) + c[i - 1]);
f[(int) (i / 2)] /= NORMFACT;
if (f[(int) (i / 2)] > MAXSAMPLE)
f[(int) (i / 2)] = MAXSAMPLE;
if (f[(int) (i / 2)] < -MAXSAMPLE)
f[(int) (i / 2)] = -MAXSAMPLE;
}
return len/2;
return len / 2;
}
SWITCH_DECLARE(int) switch_float_to_char(float *f, char *c, int len)
@@ -141,25 +146,25 @@ SWITCH_DECLARE(int) switch_float_to_char(float *f, char *c, int len)
int i;
float ft;
long l;
for(i=0;i<len;i++) {
for (i = 0; i < len; i++) {
ft = f[i] * NORMFACT;
if (ft >= 0) {
l = (long)(ft+0.5);
l = (long) (ft + 0.5);
} else {
l = (long)(ft-0.5);
l = (long) (ft - 0.5);
}
c[i*2] = (unsigned char)((l)&0xff);
c[i*2+1] = (unsigned char)(((l)>>8)&0xff);
c[i * 2] = (unsigned char) ((l) & 0xff);
c[i * 2 + 1] = (unsigned char) (((l) >> 8) & 0xff);
}
return len*2;
return len * 2;
}
SWITCH_DECLARE(int) switch_short_to_float(short *s, float *f, int len)
{
int i;
for(i=0;i<len;i++) {
f[i] = (float)(s[i]) / NORMFACT;
for (i = 0; i < len; i++) {
f[i] = (float) (s[i]) / NORMFACT;
//f[i] = (float) s[i];
}
return len;
@@ -170,6 +175,6 @@ SWITCH_DECLARE(void) switch_swap_linear(int16_t *buf, int len)
{
int i;
for (i = 0; i < len; i++) {
buf[i] = ((buf[i] >> 8) & 0x00ff) | ((buf[i] << 8) & 0xff00);
buf[i] = ((buf[i] >> 8) & 0x00ff) | ((buf[i] << 8) & 0xff00);
}
}