+++ /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 "bcdisplayinfo.h"
-#include "clip.h"
-#include "bchash.h"
-#include "guicast.h"
-#include "filexml.h"
-#include "language.h"
-#include "mainprogress.h"
-#include "pluginaclient.h"
-#include "samples.h"
-#include "transportque.h"
-
-#include <string.h>
-
-
-
-
-
-
-
-
-
-
-
-
-class InterpolateAudioEffect : public PluginAClient
-{
-public:
- InterpolateAudioEffect(PluginServer *server);
- ~InterpolateAudioEffect();
-
- const char* plugin_title();
-
- int process_buffer(int64_t size,
- Samples *buffer,
- int64_t start_position,
- int sample_rate);
- int is_realtime();
-
-#define FRAGMENT_SIZE 4096
- Samples *start_fragment;
- Samples *end_fragment;
- double start_sample;
- double end_sample;
- int64_t range_start;
- int64_t range_end;
-};
-
-
-
-
-REGISTER_PLUGIN(InterpolateAudioEffect)
-
-
-
-
-
-
-
-InterpolateAudioEffect::InterpolateAudioEffect(PluginServer *server)
- : PluginAClient(server)
-{
- start_fragment = 0;
- end_fragment = 0;
-}
-
-InterpolateAudioEffect::~InterpolateAudioEffect()
-{
- if(start_fragment) delete start_fragment;
- if(end_fragment) delete end_fragment;
-}
-
-
-
-
-const char* InterpolateAudioEffect::plugin_title() { return _("Interpolate"); }
-int InterpolateAudioEffect::is_realtime() { return 1; }
-
-
-
-
-
-int InterpolateAudioEffect::process_buffer(int64_t size,
- Samples *buffer,
- int64_t start_position,
- int sample_rate)
-{
- if(!start_fragment) start_fragment = new Samples(FRAGMENT_SIZE);
- if(!end_fragment) end_fragment = new Samples(FRAGMENT_SIZE);
- double *buffer_samples = buffer->get_data();
- double *start_samples = start_fragment->get_data();
- double *end_samples = end_fragment->get_data();
-
- if(get_direction() == PLAY_FORWARD)
- {
-// On first sample of range. Get boundary samples of effect.
- if(get_source_position() == get_source_start())
- {
-// Need to read before desired sample to diffuse transients after audio
-// seeks.
- range_start = get_source_start();
- range_end = get_source_start() + get_total_len();
-//printf("InterpolateAudioEffect::process_buffer 1 %p\n", start_fragment);
- read_samples(start_fragment,
- 0,
- sample_rate,
- range_start - FRAGMENT_SIZE,
- FRAGMENT_SIZE);
- start_sample = start_samples[FRAGMENT_SIZE - 1];
- read_samples(end_fragment,
- 0,
- sample_rate,
- range_end - FRAGMENT_SIZE,
- FRAGMENT_SIZE);
- end_sample = end_samples[FRAGMENT_SIZE - 1];
- }
-
-
- for(int i = 0; i < size; i++)
- {
- double end_fraction = (double)(i + start_position - range_start) /
- (range_end - range_start);
- double start_fraction = 1.0 - end_fraction;
- double out_sample = start_sample * start_fraction +
- end_sample * end_fraction;
- buffer_samples[i] = out_sample;
- }
- }
- else
- {
-// On first sample of range. Get boundary samples of effect.
- if(get_source_position() == get_source_start() + get_total_len())
- {
-// Need to read before desired sample to diffuse transients after audio
-// seeks.
- range_start = get_source_start() + get_total_len();
- range_end = get_source_start();
- read_samples(start_fragment,
- 0,
- sample_rate,
- range_start,
- FRAGMENT_SIZE);
- start_sample = start_samples[0];
- read_samples(end_fragment,
- 0,
- sample_rate,
- range_end,
- FRAGMENT_SIZE);
- end_sample = end_samples[0];
- }
-
-
- for(int i = 0; i < size; i++)
- {
- double start_fraction = (double)(start_position - i - range_end) /
- (range_start - range_end);
- double end_fraction = 1.0 - start_fraction;
- double out_sample = start_sample * start_fraction +
- end_sample * end_fraction;
- buffer_samples[i] = out_sample;
- }
- }
- return 0;
-}
-
-
projects / goodguy / history.git / blobdiff