Merge CV, ver=5.1; ops/methods from HV, and interface from CV where possible

[goodguy/history.git] / cinelerra-5.1 / plugins / interpolateaudio / interpolateaudio.C

diff --git a/cinelerra-5.1/plugins/interpolateaudio/interpolateaudio.C b/cinelerra-5.1/plugins/interpolateaudio/interpolateaudio.C
new file mode 100644 (file)
index 0000000..c995b43
--- /dev/null
+++ b/cinelerra-5.1/plugins/interpolateaudio/interpolateaudio.C
@@ -0,0 +1,186 @@
+
+/*
+ * 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;
+}
+
+