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/* libClunk - cross-platform 3D audio API built on top SDL library
* Copyright (C) 2007-2008 Netive Media Group
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define _USE_MATH_DEFINES
#include <math.h>
#include <SDL_rwops.h>
#include "sample.h"
#include "sdl_ex.h"
#include "context.h"
#include "locker.h"
using namespace clunk;
Sample::Sample(Context *context) : gain(1.0f), pitch(1.0f), context(context) {}
void Sample::generateSine(const int freq, const float len) {
AudioLocker l;
spec.freq = context->get_spec().freq;
spec.channels = 1;
spec.format = context->get_spec().format;
unsigned size = ((int)(len * spec.freq)) * 2;
data.set_size(size);
static double a = 0;
double da = freq * 2 * M_PI / spec.freq;
//LOG_DEBUG(("da = %g", da));
int n = size / 2;
Sint16 * stream = (Sint16 *)data.get_ptr();
for(int i = 0; i < n; ++i) {
*stream++ = (Sint16)(32767 * sin(a));
//*stream++ = 0;
a += da;
}
LOG_DEBUG(("generated %u bytes", (unsigned)data.get_size()));
}
void Sample::init(const clunk::Buffer &src_data, int rate, const Uint16 format, const Uint8 channels) {
AudioLocker l;
spec.freq = context->get_spec().freq;
spec.channels = channels;
spec.format = context->get_spec().format;
context->convert(data, src_data, rate, format, channels);
}
void Sample::load(const std::string &file) {
Uint8 *buf;
Uint32 len;
//SDL_AudioSpec * SDLCALL SDL_LoadWAV_RW(SDL_RWops *src, int freesrc, SDL_AudioSpec *spec, Uint8 **audio_buf, Uint32 *audio_len);
if (SDL_LoadWAV(file.c_str(), &spec, &buf, &len) == NULL)
throw_sdl(("SDL_LoadWav"));
clunk::Buffer wav;
wav.set_data(buf, len, true);
context->convert(data, wav, spec.freq, spec.format, spec.channels);
name = file;
}
Sample::~Sample() {
}
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