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added remaining float_to_*() 

git-svn-id: file:///srv/svn/repos/haiku/trunk/current@3420 a95241bf-73f2-0310-859d-f6bbb57e9c96
This commit is contained in:
beveloper 2003-06-04 00:41:02 +00:00
parent 88e430cbeb
commit 9b875fba0c
1 changed files with 254 additions and 1 deletions
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255
src/add-ons/media/media-add-ons/mixer/Resampler.cpp
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@ -331,23 +331,276 @@ void
Resampler::float_to_int32(const void *_src, int32 src_sample_offset, int32 src_sample_count,
void *_dst, int32 dst_sample_offset, int32 dst_sample_count, float _gain)
{
register const char * src = (const char *) _src;
register char * dst = (char *) _dst;
register int32 count = dst_sample_count;
register float gain = _gain * 2147483647.0;
if (src_sample_count == dst_sample_count) {
// optimized case for no resampling
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 2147483647.0f)
*(int32 *)dst = 2147483647L;
else if (sample < -2147483647.0f)
*(int32 *)dst = -2147483647L;
else
*(int32 *)dst = (int32)sample;
src += src_sample_offset;
dst += dst_sample_offset;
}
return;
}
register float delta = float(src_sample_count) / float(dst_sample_offset);
register float current = 0.0f;
if (delta < 1.0) {
// upsample
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 2147483647.0f)
*(int32 *)dst = 2147483647L;
else if (sample < -2147483647.0f)
*(int32 *)dst = -2147483647L;
else
*(int32 *)dst = (int32)sample;
dst += dst_sample_offset;
current += delta;
if (current > 1.0f) {
current -= 1.0f;
src += src_sample_offset;
}
}
} else {
// downsample
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 2147483647.0f)
*(int32 *)dst = 2147483647L;
else if (sample < -2147483647.0f)
*(int32 *)dst = -2147483647L;
else
*(int32 *)dst = (int32)sample;
src += src_sample_offset;
current += delta; // delta is always > 1.0
if (current < 2.0f) {
current -= 1.0f;
dst += dst_sample_offset;
} else {
int32 inc_count = (int32) current;
current -= (float) inc_count;
dst += inc_count * dst_sample_offset;
}
}
}
}
void
Resampler::float_to_int16(const void *_src, int32 src_sample_offset, int32 src_sample_count,
void *_dst, int32 dst_sample_offset, int32 dst_sample_count, float _gain)
{
register const char * src = (const char *) _src;
register char * dst = (char *) _dst;
register int32 count = dst_sample_count;
register float gain = _gain * 32767.0;
if (src_sample_count == dst_sample_count) {
// optimized case for no resampling
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 32767.0f)
*(int16 *)dst = 32767;
else if (sample < -32767.0f)
*(int16 *)dst = -32767;
else
*(int16 *)dst = (int16)sample;
src += src_sample_offset;
dst += dst_sample_offset;
}
return;
}
register float delta = float(src_sample_count) / float(dst_sample_offset);
register float current = 0.0f;
if (delta < 1.0) {
// upsample
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 32767.0f)
*(int16 *)dst = 32767;
else if (sample < -32767.0f)
*(int16 *)dst = -32767;
else
*(int16 *)dst = (int16)sample;
dst += dst_sample_offset;
current += delta;
if (current > 1.0f) {
current -= 1.0f;
src += src_sample_offset;
}
}
} else {
// downsample
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 32767.0f)
*(int16 *)dst = 32767;
else if (sample < -32767.0f)
*(int16 *)dst = -32767;
else
*(int16 *)dst = (int16)sample;
src += src_sample_offset;
current += delta; // delta is always > 1.0
if (current < 2.0f) {
current -= 1.0f;
dst += dst_sample_offset;
} else {
int32 inc_count = (int32) current;
current -= (float) inc_count;
dst += inc_count * dst_sample_offset;
}
}
}
}
void
Resampler::float_to_int8(const void *src, int32 src_sample_offset, int32 src_sample_count,
Resampler::float_to_int8(const void *_src, int32 src_sample_offset, int32 src_sample_count,
void *_dst, int32 dst_sample_offset, int32 dst_sample_count, float _gain)
{
register const char * src = (const char *) _src;
register char * dst = (char *) _dst;
register int32 count = dst_sample_count;
register float gain = _gain * 127.0;
if (src_sample_count == dst_sample_count) {
// optimized case for no resampling
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 127.0f)
*(int8 *)dst = 127;
else if (sample < -127.0f)
*(int8 *)dst = -127;
else
*(int8 *)dst = (int8)sample;
src += src_sample_offset;
dst += dst_sample_offset;
}
return;
}
register float delta = float(src_sample_count) / float(dst_sample_offset);
register float current = 0.0f;
if (delta < 1.0) {
// upsample
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 127.0f)
*(int8 *)dst = 127;
else if (sample < -127.0f)
*(int8 *)dst = -127;
else
*(int8 *)dst = (int8)sample;
dst += dst_sample_offset;
current += delta;
if (current > 1.0f) {
current -= 1.0f;
src += src_sample_offset;
}
}
} else {
// downsample
while (count--) {
register float sample = *(const float *)src * gain;
if (sample > 127.0f)
*(int8 *)dst = 127;
else if (sample < -127.0f)
*(int8 *)dst = -127;
else
*(int8 *)dst = (int8)sample;
src += src_sample_offset;
current += delta; // delta is always > 1.0
if (current < 2.0f) {
current -= 1.0f;
dst += dst_sample_offset;
} else {
int32 inc_count = (int32) current;
current -= (float) inc_count;
dst += inc_count * dst_sample_offset;
}
}
}
}
void
Resampler::float_to_uint8(const void *_src, int32 src_sample_offset, int32 src_sample_count,
void *_dst, int32 dst_sample_offset, int32 dst_sample_count, float _gain)
{
register const char * src = (const char *) _src;
register char * dst = (char *) _dst;
register int32 count = dst_sample_count;
register float gain = _gain * 127.0;
if (src_sample_count == dst_sample_count) {
// optimized case for no resampling
while (count--) {
register float sample = 128.0f + *(const float *)src * gain;
if (sample > 255.0f)
*(uint8 *)dst = 255;
else if (sample < 1.0f)
*(uint8 *)dst = 1;
else
*(uint8 *)dst = (uint8)sample;
src += src_sample_offset;
dst += dst_sample_offset;
}
return;
}
register float delta = float(src_sample_count) / float(dst_sample_offset);
register float current = 0.0f;
if (delta < 1.0) {
// upsample
while (count--) {
register float sample = 128.0f + *(const float *)src * gain;
if (sample > 255.0f)
*(uint8 *)dst = 255;
else if (sample < 1.0f)
*(uint8 *)dst = 1;
else
*(uint8 *)dst = (uint8)sample;
dst += dst_sample_offset;
current += delta;
if (current > 1.0f) {
current -= 1.0f;
src += src_sample_offset;
}
}
} else {
// downsample
while (count--) {
register float sample = 128.0f + *(const float *)src * gain;
if (sample > 255.0f)
*(uint8 *)dst = 255;
else if (sample < 1.0f)
*(uint8 *)dst = 1;
else
*(uint8 *)dst = (uint8)sample;
src += src_sample_offset;
current += delta; // delta is always > 1.0
if (current < 2.0f) {
current -= 1.0f;
dst += dst_sample_offset;
} else {
int32 inc_count = (int32) current;
current -= (float) inc_count;
dst += inc_count * dst_sample_offset;
}
}
}
}