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/*! \file
* implementation functions for class qsample
*/
# include <stdint.h>
# include <stdlib.h> // abs
# include "qwavsample.hh"
# include "qexception.hh"
# include "endian.hh"
#ifdef NLS
# include <locale.h>
# include <libintl.h>
/*! \def define _(s)
* \brief gettextize strings
*/
# define _(s) gettext(s)
#else
/*! \def define _(s)
* \brief bypass gettextization
*/
# define _(s) (s)
#endif
qwavsample::qwavsample (qwav *wav, u_int32_t s) {
sample = (union sample*) (wav->getMap()+wav->getOffset(s));
if (wav->getBitsPerSample()==16) {
if ((uintptr_t)sample % sizeof(int16_t) != 0)
throw qexception(__PRETTY_FUNCTION__, _("misaligned 16-bit sample"));
if (wav->getChannels()==2) {
type = STEREO16;
}
else if (wav->getChannels()==1) {
type = MONO16;
}
else
throw qexception(__PRETTY_FUNCTION__,_("unsupported channel value"));
}
else if (wav->getBitsPerSample()==8) {
if (wav->getChannels()==2) {
type = STEREO8;
}
else if (wav->getChannels()==1) {
type = MONO8;
}
else
throw qexception(__PRETTY_FUNCTION__,_("unsupported channel value"));
}
else
throw qexception(__PRETTY_FUNCTION__,_("unsupported bits/sample value"));
#ifdef QVERBOSE
cerr << "sample type " << type << " mapped at address " << this->sample << endl;
#endif
}
qwavsample::qwavsample(caddr_t pointer, u_int32_t channels, u_int32_t bitspersample) {
sample = (union sample*) pointer;
if (bitspersample==16) {
if ((uintptr_t)sample % sizeof(int16_t) != 0)
throw qexception(__PRETTY_FUNCTION__, _("misaligned 16-bit sample"));
if (channels==2) {
type = STEREO16;
return;
}
else if (channels==1) {
type = MONO16;
return;
}
else
throw qexception(__PRETTY_FUNCTION__,_("unsupported channel value"));
}
else if (bitspersample==8) {
if (channels==2) {
type = STEREO8;
return;
}
else if (channels==1) {
type = MONO8;
return;
}
else
throw qexception(__PRETTY_FUNCTION__,_("unsupported channel value"));
}
else
throw qexception(__PRETTY_FUNCTION__,_("unsupported bits/sample value"));
}
qwavsample::qwavsample(caddr_t pointer, enum type t) {
sample = (union sample*) pointer;
type = t;
}
int qwavsample::getLeft() {
switch (type) {
case MONO8: return sample->mono8;
case MONO16: return letohs_s(sample->mono16);
case STEREO8: return sample->stereo8.left;
case STEREO16: return letohs_s(sample->stereo16.left);
}
throw qexception(__PRETTY_FUNCTION__,_("quelcom internal error"));
}
int qwavsample::getRight() {
switch (type) {
case MONO8: return sample->mono8;
case MONO16: return letohs_s(sample->mono16);
case STEREO8: return sample->stereo8.right;
case STEREO16: return letohs_s(sample->stereo16.right);
}
throw qexception(__PRETTY_FUNCTION__,_("quelcom internal error"));
}
void qwavsample::set(int left, int right) {
switch (type) {
case MONO8: sample->mono8=left; break;
case MONO16: sample->mono16=htoles_s(left); break;
case STEREO8: sample->stereo8.left=left;sample->stereo8.right=right; break;
case STEREO16: sample->stereo16.left=htoles_s(left);sample->stereo16.right=htoles_s(right); break;
default:
throw qexception(__PRETTY_FUNCTION__,_("quelcom internal error"));
}
}
bool qwavsample::isSilence(u_int32_t threshold) {
switch (type) {
case MONO8: return (u_int32_t)abs(sample->mono8)<=threshold;
case MONO16: return (u_int32_t)abs(letohs_s(sample->mono16))<=threshold;
case STEREO8:
return ((u_int32_t)abs(sample->stereo8.left)<=threshold) &&
((u_int32_t)abs(sample->stereo8.right)<=threshold);
case STEREO16:
return ((u_int32_t)abs(letohs_s(sample->stereo16.left))<=threshold) &&
((u_int32_t)abs(letohs_s(sample->stereo16.right))<=threshold);
}
throw qexception(__PRETTY_FUNCTION__,_("quelcom internal error"));
}
void qwavsample::setNext() {
switch (type) {
case MONO8: sample = (union sample*)((char*)sample + 1); break;
case MONO16: sample = (union sample*)((uint16_t*)sample + 1); break;
case STEREO8: sample = (union sample*)((struct stereo8*)sample + 1); break;
case STEREO16: sample = (union sample*)((struct stereo16*)sample + 1); break;
default:
throw qexception(__PRETTY_FUNCTION__,_("quelcom internal error"));
}
#ifdef QVERBOSE
cerr << "sample now is mapped at " << (void*) sample << endl;
#endif
}
ostream& operator<<(ostream &os, qwavsample &s) {
s.print(os);
return os;
}
void qwavsample::print(ostream &os) {
switch (type) {
case MONO8: os << '(' << sample->mono8 << ')'; break;
case MONO16: os << '(' << letohs_s(sample->mono16) << ')'; break;
case STEREO8:
os << '(' << sample->stereo8.left << ',' << sample->stereo8.right << ')';
break;
case STEREO16:
os << '(' << letohs_s(sample->stereo16.left) << ',' << letohs_s(sample->stereo16.right) << ')';
break;
default:
throw qexception(__PRETTY_FUNCTION__,_("quelcom internal error"));
}
}
void qwavsample::prod(double d) {
switch (type) {
case MONO8: sample->mono8*=(char)d; break;
case MONO16:
sample->mono16 = htoles_s(short(letohs_s(sample->mono16)*d));
break;
case STEREO8: sample->stereo8.left*=(char)d; sample->stereo8.right*=(char)d; break;
case STEREO16:
sample->stereo16.left = htoles_s(short(letohs_s(sample->stereo16.left)*d));
sample->stereo16.right = htoles_s(short(letohs_s(sample->stereo16.right)*d));
break;
default:
throw qexception(__PRETTY_FUNCTION__,_("quelcom internal error"));
}
}
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