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/* ---------------------------------------------------------------------
*
* Giada - Your Hardcore Loopmachine
*
* wave
*
* ---------------------------------------------------------------------
*
* Copyright (C) 2010-2015 Giovanni A. Zuliani | Monocasual
*
* This file is part of Giada - Your Hardcore Loopmachine.
*
* Giada - Your Hardcore Loopmachine is free software: you can
* redistribute it and/or modify it under the terms of the GNU General
* Public License as published by the Free Software Foundation, either
* version 3 of the License, or (at your option) any later version.
*
* Giada - Your Hardcore Loopmachine 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 General Public License
* along with Giada - Your Hardcore Loopmachine. If not, see
* <http://www.gnu.org/licenses/>.
*
* ------------------------------------------------------------------ */
#include <stdio.h>
#include <stdlib.h>
#include <string.h> // memcpy
#include <math.h>
#include "wave.h"
#include "utils.h"
#include "conf.h"
#include "init.h"
#include "log.h"
extern Conf G_Conf;
Wave::Wave()
: data (NULL),
size (0),
isLogical(0),
isEdited (0) {}
/* ------------------------------------------------------------------ */
Wave::~Wave() {
clear();
}
/* ------------------------------------------------------------------ */
int Wave::open(const char *f) {
pathfile = f;
name = gStripExt(gBasename(f).c_str());
fileIn = sf_open(f, SFM_READ, &inHeader);
if (fileIn == NULL) {
gLog("[wave] unable to read %s. %s\n", f, sf_strerror(fileIn));
pathfile = "";
name = "";
return 0;
}
isLogical = false;
isEdited = false;
return 1;
}
/* ------------------------------------------------------------------ */
/* how to read and write with libsndfile:
*
* a frame consists of all items (samples) that belong to the same
* point in time. So in each frame there are as many items as there
* are channels.
*
* Quindi:
* frame = [item, item, ...]
* In pratica:
* frame1 = [itemLeft, itemRight]
* frame2 = [itemLeft, itemRight]
* ...
*/
int Wave::readData() {
size = inHeader.frames * inHeader.channels;
data = (float *) malloc(size * sizeof(float));
if (data == NULL) {
gLog("[wave] unable to allocate memory\n");
return 0;
}
if (sf_read_float(fileIn, data, size) != size)
gLog("[wave] warning: incomplete read!\n");
sf_close(fileIn);
return 1;
}
/* ------------------------------------------------------------------ */
int Wave::writeData(const char *f) {
/* prepare the header for output file */
outHeader.samplerate = inHeader.samplerate;
outHeader.channels = inHeader.channels;
outHeader.format = inHeader.format;
fileOut = sf_open(f, SFM_WRITE, &outHeader);
if (fileOut == NULL) {
gLog("[wave] unable to open %s for exporting\n", f);
return 0;
}
int out = sf_write_float(fileOut, data, size);
if (out != (int) size) {
gLog("[wave] error while exporting %s! %s\n", f, sf_strerror(fileOut));
return 0;
}
isLogical = false;
isEdited = false;
sf_close(fileOut);
return 1;
}
/* ------------------------------------------------------------------ */
void Wave::clear() {
if (data != NULL) {
free(data);
data = NULL;
pathfile = "";
size = 0;
}
}
/* ------------------------------------------------------------------ */
int Wave::allocEmpty(unsigned __size) {
/* the caller must pass a __size for stereo values */
/// FIXME - this way if malloc fails size becomes wrong
size = __size;
data = (float *) malloc(size * sizeof(float));
if (data == NULL) {
gLog("[wave] unable to allocate memory\n");
return 0;
}
memset(data, 0, sizeof(float) * size); /// FIXME - is it useful?
inHeader.samplerate = G_Conf.samplerate;
inHeader.channels = 2;
inHeader.format = SF_FORMAT_WAV | SF_FORMAT_FLOAT; // wave only
isLogical = true;
return 1;
}
/* ------------------------------------------------------------------ */
int Wave::resample(int quality, int newRate) {
float ratio = newRate / (float) inHeader.samplerate;
int newSize = ceil(size * ratio);
if (newSize % 2 != 0) // libsndfile goes crazy with odd size in case of saving
newSize++;
float *tmp = (float *) malloc(newSize * sizeof(float));
if (!tmp) {
gLog("[wave] unable to allocate memory for resampling\n");
return -1;
}
SRC_DATA src_data;
src_data.data_in = data;
src_data.input_frames = size/2; // in frames, i.e. /2 (stereo)
src_data.data_out = tmp;
src_data.output_frames = newSize/2; // in frames, i.e. /2 (stereo)
src_data.src_ratio = ratio;
gLog("[wave] resampling: new size=%d (%d frames)\n", newSize, newSize/2);
int ret = src_simple(&src_data, quality, 2);
if (ret != 0) {
gLog("[wave] resampling error: %s\n", src_strerror(ret));
return 0;
}
free(data);
data = tmp;
size = newSize;
inHeader.samplerate = newRate;
return 1;
}
/* ------------------------------------------------------------------ */
std::string Wave::basename() {
return gStripExt(gBasename(pathfile.c_str()).c_str());
}
std::string Wave::extension() {
return gGetExt(pathfile.c_str());
}
/* ------------------------------------------------------------------ */
void Wave::updateName(const char *n) {
std::string ext = gGetExt(pathfile.c_str());
name = gStripExt(gBasename(n).c_str());
pathfile = gDirname(pathfile.c_str()) + gGetSlash() + name + "." + ext;
isLogical = true;
/* a wave with updated name must become logical, since the underlying
* file does not exist yet. */
}
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