+++ /dev/null
-
-/*
- * CINELERRA
- * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
- *
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- */
-
-#include "samples.h"
-#include "timestretchengine.h"
-
-
-#include <stdio.h>
-#include <string.h>
-#include <unistd.h>
-
-
-
-
-
-TimeStretchEngine::TimeStretchEngine(double scale, int sample_rate, int window_time)
-{
- output = 0;
- output_allocation = 0;
- input = 0;
- input_allocation = 0;
- reset();
- update(scale, sample_rate, window_time);
-}
-
-TimeStretchEngine::~TimeStretchEngine()
-{
- if(output) delete [] output;
- if(input) delete [] input;
-}
-
-void TimeStretchEngine::reset()
-{
- input_size = 0;
- input_sample = 0;
- output_size = 0;
- output_sample = 0;
-}
-
-void TimeStretchEngine::update(double scale, int sample_rate, int window_time)
-{
- this->scale = scale;
- this->sample_rate = sample_rate;
- this->window_time = window_time;
-
- window_size = (int64_t)sample_rate * (int64_t)window_time / (int64_t)1000;
- window_skirt = window_size / 2;
-//printf("TimeStretchEngine::update %d %d\n", __LINE__, window_size);
- if(output) delete [] output;
- if(input) delete [] input;
-//printf("TimeStretchEngine::update %d %d\n", __LINE__, window_size);
-
- output = 0;
- output_allocation = 0;
- input = 0;
- input_allocation = 0;
-}
-
-
-void TimeStretchEngine::overlay(double *out, double *in, int size, int skirt)
-{
-// Fade in
- for(int i = 0; i < skirt; i++)
- {
- *out = *out * (1.0 - (double)i / skirt) + *in * ((double)i / skirt);
- out++;
- in++;
- }
-
-// Center
- for(int i = 0; i < size - skirt; i++)
- {
- *out++ = *in++;
- }
-
-// New skirt
- for(int i = 0; i < skirt; i++)
- {
- *out++ = *in++;
- }
-}
-
-int TimeStretchEngine::process(Samples *in_buffer, int in_size)
-{
-// printf("TimeStretchEngine::process %d in_buffer=%p in_size=%d\n",
-// __LINE__,
-// in_buffer,
-// in_size);
-// Stack on input buffer
- if(!input || input_size + in_size > input_allocation)
- {
- int new_input_allocation = input_size + in_size;
- double *new_input = new double[new_input_allocation];
- if(input)
- {
- memcpy(new_input, input, input_size * sizeof(double));
- delete [] input;
- }
- input = new_input;
- input_allocation = new_input_allocation;
- }
-
-// printf("TimeStretchEngine::process %d input=%p input_size=%d input_allocation=%d\n",
-// __LINE__,
-// input,
-// input_size,
-// input_allocation);
-
- memcpy(input + input_size, in_buffer->get_data(), in_size * sizeof(double));
- input_size += in_size;
-
-//printf("TimeStretchEngine::process %d\n", __LINE__);
-// Overlay windows from input buffer into output buffer
- int done = 0;
- do
- {
- int64_t current_out_sample = output_sample + output_size;
- int64_t current_in_sample = (int64_t)((double)current_out_sample / scale);
-
- if(current_in_sample - input_sample + window_size + window_skirt > input_size)
- {
-// Shift input buffer so the fragment that would have been copied now will be
-// in the next iteration.
-
-
-// printf("TimeStretchEngine::process %d %lld %d\n",
-// __LINE__,
-// current_in_sample - input_sample,
-// input_size);
-
- if(current_in_sample - input_sample < input_size)
- {
- memcpy(input,
- input + current_in_sample - input_sample,
- (input_size - (current_in_sample - input_sample)) * sizeof(double));
- input_size -= current_in_sample - input_sample;
- input_sample = current_in_sample;
- }
-
- done = 1;
-//printf("TimeStretchEngine::process %d input_size=%d\n", __LINE__, input_size);
- }
- else
- {
-//printf("TimeStretchEngine::process %d\n", __LINE__);
-// Allocate output buffer
- if(output_size + window_size + window_skirt > output_allocation)
- {
- int new_allocation = output_size + window_size + window_skirt;
- double *new_output = new double[new_allocation];
- bzero(new_output, new_allocation * sizeof(double));
- if(output)
- {
- memcpy(new_output,
- output,
- (output_size + window_skirt) * sizeof(double));
-// printf("TimeStretchEngine::process %d this=%p output=%p new_allocation=%d\n",
-// __LINE__,
-// this,
-// output,
-// new_allocation);
- delete [] output;
-//printf("TimeStretchEngine::process %d\n", __LINE__);
- }
- output = new_output;
- output_allocation = new_allocation;
- }
-
-// Overlay new window
- overlay(output + output_size,
- input + current_in_sample - input_sample,
- window_size,
- window_skirt);
- output_size += window_size;
-//printf("TimeStretchEngine::process 30 %d\n", output_size);
- }
- }while(!done);
-
-//printf("TimeStretchEngine::process %d %d\n", __LINE__, output_size);
- return output_size;
-}
-
-void TimeStretchEngine::read_output(Samples *buffer, int size)
-{
- memcpy(buffer->get_data(), output, size * sizeof(double));
- memcpy(output, output + size, (output_size + window_skirt - size) * sizeof(double));
- output_size -= size;
- output_sample += size;
-}
-
-int TimeStretchEngine::get_output_size()
-{
- return output_size;
-}
-
-double* TimeStretchEngine::get_samples()
-{
- return output;
-}
-
-
-
-
-
-
-
-
-
projects / goodguy / history.git / blobdiff