2 Copyright (C) 2004 Paul Davis
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #define __STDC_FORMAT_MACROS 1
36 #include <pbd/error.h>
37 #include <pbd/failed_constructor.h>
38 #include <pbd/xml++.h>
39 #include <pbd/enumwriter.h>
41 #include <ardour/session.h>
42 #include <ardour/panner.h>
43 #include <ardour/utils.h>
45 #include <ardour/mix.h>
46 #include <ardour/buffer_set.h>
50 #include <pbd/mathfix.h>
53 using namespace ARDOUR;
56 float Panner::current_automation_version_number = 1.0;
58 string EqualPowerStereoPanner::name = "Equal Power Stereo";
59 string Multi2dPanner::name = "Multiple (2D)";
61 /* this is a default mapper of control values to a pan position
62 others can be imagined.
65 static pan_t direct_control_to_pan (double fract) {
69 static double direct_pan_to_control (pan_t val) {
73 StreamPanner::StreamPanner (Panner& p)
75 _control (X_("panner"), *this)
79 parent.session().add_controllable (&_control);
86 StreamPanner::~StreamPanner ()
91 StreamPanner::PanControllable::set_value (float val)
93 panner.set_position (direct_control_to_pan (val));
97 StreamPanner::PanControllable::get_value (void) const
100 panner.get_effective_position (xpos);
101 return direct_pan_to_control (xpos);
105 StreamPanner::PanControllable::can_send_feedback () const
107 AutoState astate = panner.get_parent().automation_state ();
109 if ((astate == Play) || (astate == Touch && !panner.get_parent().touching())) {
117 StreamPanner::set_muted (bool yn)
126 StreamPanner::set_position (float xpos, bool link_call)
128 if (!link_call && parent.linked()) {
129 parent.set_position (xpos, *this);
141 StreamPanner::set_position (float xpos, float ypos, bool link_call)
143 if (!link_call && parent.linked()) {
144 parent.set_position (xpos, ypos, *this);
147 if (x != xpos || y != ypos) {
157 StreamPanner::set_position (float xpos, float ypos, float zpos, bool link_call)
159 if (!link_call && parent.linked()) {
160 parent.set_position (xpos, ypos, zpos, *this);
163 if (x != xpos || y != ypos || z != zpos) {
173 StreamPanner::set_state (const XMLNode& node)
175 const XMLProperty* prop;
176 XMLNodeConstIterator iter;
178 if ((prop = node.property (X_("muted")))) {
179 set_muted (prop->value() == "yes");
186 StreamPanner::add_state (XMLNode& node)
188 node.add_property (X_("muted"), (muted() ? "yes" : "no"));
191 /*---------------------------------------------------------------------- */
193 BaseStereoPanner::BaseStereoPanner (Panner& p)
194 : StreamPanner (p), _automation (0.0, 1.0, 0.5)
198 BaseStereoPanner::~BaseStereoPanner ()
203 BaseStereoPanner::snapshot (nframes_t now)
205 if (_automation.automation_state() == Write || _automation.automation_state() == Touch) {
206 _automation.rt_add (now, x);
211 BaseStereoPanner::transport_stopped (nframes_t frame)
213 _automation.reposition_for_rt_add (frame);
215 if (_automation.automation_state() != Off) {
216 set_position (_automation.eval (frame));
221 BaseStereoPanner::set_automation_style (AutoStyle style)
223 _automation.set_automation_style (style);
227 BaseStereoPanner::set_automation_state (AutoState state)
229 if (state != _automation.automation_state()) {
231 _automation.set_automation_state (state);
234 set_position (_automation.eval (parent.session().transport_frame()));
240 BaseStereoPanner::load (istream& in, string path, uint32_t& linecnt)
243 LocaleGuard lg (X_("POSIX"));
245 _automation.clear ();
247 while (in.getline (line, sizeof (line), '\n')) {
253 if (strcmp (line, "end") == 0) {
257 if (sscanf (line, "%" PRIu32 " %lf", &when, &value) != 2) {
258 warning << string_compose(_("badly formatted pan automation event record at line %1 of %2 (ignored) [%3]"), linecnt, path, line) << endmsg;
262 _automation.fast_simple_add (when, value);
265 /* now that we are done loading */
267 _automation.StateChanged ();
273 BaseStereoPanner::distribute (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes)
275 assert(obufs.count().get(DataType::AUDIO) == 2);
285 Sample* const src = srcbuf.data(nframes);
289 dst = obufs.get_audio(0).data(nframes);
291 if (fabsf ((delta = (left - desired_left))) > 0.002) { // about 1 degree of arc
293 /* interpolate over 64 frames or nframes, whichever is smaller */
295 nframes_t limit = min ((nframes_t)64, nframes);
298 delta = -(delta / (float) (limit));
300 for (n = 0; n < limit; n++) {
301 left_interp = left_interp + delta;
302 left = left_interp + 0.9 * (left - left_interp);
303 dst[n] += src[n] * left * gain_coeff;
306 pan = left * gain_coeff;
308 Session::mix_buffers_with_gain(dst+n,src+n,nframes-n,pan);
315 if ((pan = (left * gain_coeff)) != 1.0f) {
319 Session::mix_buffers_with_gain(dst,src,nframes,pan);
321 /* mark that we wrote into the buffer */
329 Session::mix_buffers_no_gain(dst,src,nframes);
331 /* mark that we wrote into the buffer */
339 dst = obufs.get_audio(1).data(nframes);
341 if (fabsf ((delta = (right - desired_right))) > 0.002) { // about 1 degree of arc
343 /* interpolate over 64 frames or nframes, whichever is smaller */
345 nframes_t limit = min ((nframes_t)64, nframes);
348 delta = -(delta / (float) (limit));
350 for (n = 0; n < limit; n++) {
351 right_interp = right_interp + delta;
352 right = right_interp + 0.9 * (right - right_interp);
353 dst[n] += src[n] * right * gain_coeff;
356 pan = right * gain_coeff;
358 Session::mix_buffers_with_gain(dst+n,src+n,nframes-n,pan);
360 /* XXX it would be nice to mark the buffer as written to */
364 right = desired_right;
365 right_interp = right;
367 if ((pan = (right * gain_coeff)) != 1.0f) {
371 Session::mix_buffers_with_gain(dst,src,nframes,pan);
373 /* XXX it would be nice to mark the buffer as written to */
378 Session::mix_buffers_no_gain(dst,src,nframes);
380 /* XXX it would be nice to mark the buffer as written to */
385 /*---------------------------------------------------------------------- */
387 EqualPowerStereoPanner::EqualPowerStereoPanner (Panner& p)
388 : BaseStereoPanner (p)
393 right = desired_right;
395 right_interp = right;
398 EqualPowerStereoPanner::~EqualPowerStereoPanner ()
403 EqualPowerStereoPanner::update ()
405 /* it would be very nice to split this out into a virtual function
406 that can be accessed from BaseStereoPanner and used in distribute_automated().
408 but the place where its used in distribute_automated() is a tight inner loop,
409 and making "nframes" virtual function calls to compute values is an absurd
413 /* x == 0 => hard left
418 float panL = 1 - panR;
420 const float pan_law_attenuation = -3.0f;
421 const float scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
423 desired_left = panL * (scale * panL + 1.0f - scale);
424 desired_right = panR * (scale * panR + 1.0f - scale);
430 EqualPowerStereoPanner::distribute_automated (AudioBuffer& srcbuf, BufferSet& obufs,
431 nframes_t start, nframes_t end, nframes_t nframes,
434 assert(obufs.count().get(DataType::AUDIO) == 2);
438 Sample* const src = srcbuf.data(nframes);
440 /* fetch positional data */
442 if (!_automation.rt_safe_get_vector (start, end, buffers[0], nframes)) {
445 distribute (srcbuf, obufs, 1.0, nframes);
450 /* store effective pan position. do this even if we are muted */
453 effective_x = buffers[0][nframes-1];
459 /* apply pan law to convert positional data into pan coefficients for
463 const float pan_law_attenuation = -3.0f;
464 const float scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
466 for (nframes_t n = 0; n < nframes; ++n) {
468 float panR = buffers[0][n];
469 float panL = 1 - panR;
471 buffers[0][n] = panL * (scale * panL + 1.0f - scale);
472 buffers[1][n] = panR * (scale * panR + 1.0f - scale);
477 dst = obufs.get_audio(0).data(nframes);
480 for (nframes_t n = 0; n < nframes; ++n) {
481 dst[n] += src[n] * pbuf[n];
484 /* XXX it would be nice to mark the buffer as written to */
488 dst = obufs.get_audio(1).data(nframes);
491 for (nframes_t n = 0; n < nframes; ++n) {
492 dst[n] += src[n] * pbuf[n];
495 /* XXX it would be nice to mark the buffer as written to */
499 EqualPowerStereoPanner::factory (Panner& parent)
501 return new EqualPowerStereoPanner (parent);
505 EqualPowerStereoPanner::get_state (void)
511 EqualPowerStereoPanner::state (bool full_state)
513 XMLNode* root = new XMLNode ("StreamPanner");
515 LocaleGuard lg (X_("POSIX"));
517 snprintf (buf, sizeof (buf), "%.12g", x);
518 root->add_property (X_("x"), buf);
519 root->add_property (X_("type"), EqualPowerStereoPanner::name);
521 XMLNode* autonode = new XMLNode (X_("Automation"));
522 autonode->add_child_nocopy (_automation.state (full_state));
523 root->add_child_nocopy (*autonode);
525 StreamPanner::add_state (*root);
527 root->add_child_nocopy (_control.get_state ());
533 EqualPowerStereoPanner::set_state (const XMLNode& node)
535 const XMLProperty* prop;
537 LocaleGuard lg (X_("POSIX"));
539 if ((prop = node.property (X_("x")))) {
540 pos = atof (prop->value().c_str());
541 set_position (pos, true);
544 StreamPanner::set_state (node);
546 for (XMLNodeConstIterator iter = node.children().begin(); iter != node.children().end(); ++iter) {
548 if ((*iter)->name() == X_("panner")) {
550 _control.set_state (**iter);
552 } else if ((*iter)->name() == X_("Automation")) {
554 _automation.set_state (*((*iter)->children().front()));
556 if (_automation.automation_state() != Off) {
557 set_position (_automation.eval (parent.session().transport_frame()));
565 /*----------------------------------------------------------------------*/
567 Multi2dPanner::Multi2dPanner (Panner& p)
568 : StreamPanner (p), _automation (0.0, 1.0, 0.5) // XXX useless
573 Multi2dPanner::~Multi2dPanner ()
578 Multi2dPanner::snapshot (nframes_t now)
584 Multi2dPanner::transport_stopped (nframes_t frame)
590 Multi2dPanner::set_automation_style (AutoStyle style)
596 Multi2dPanner::set_automation_state (AutoState state)
602 Multi2dPanner::update ()
604 static const float BIAS = FLT_MIN;
606 uint32_t nouts = parent.outputs.size();
613 for (i = 0; i < nouts; i++) {
614 dsq[i] = ((x - parent.outputs[i].x) * (x - parent.outputs[i].x) + (y - parent.outputs[i].y) * (y - parent.outputs[i].y) + BIAS);
618 f += dsq[i] * dsq[i];
621 // terrible hack to support OSX < 10.3.9 builds
622 fr = (float) (1.0 / sqrt((double)f));
626 for (i = 0; i < nouts; ++i) {
627 parent.outputs[i].desired_pan = 1.0f - (dsq[i] * fr);
634 Multi2dPanner::distribute (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes)
638 vector<Panner::Output>::iterator o;
645 Sample* const src = srcbuf.data(nframes);
648 for (n = 0, o = parent.outputs.begin(); o != parent.outputs.end(); ++o, ++n) {
650 dst = obufs.get_audio(n).data(nframes);
653 if (fabsf ((delta = (left_interp - desired_left))) > 0.002) { // about 1 degree of arc
655 /* interpolate over 64 frames or nframes, whichever is smaller */
657 nframes_t limit = min ((nframes_t)64, nframes);
660 delta = -(delta / (float) (limit));
662 for (n = 0; n < limit; n++) {
663 left_interp = left_interp + delta;
664 left = left_interp + 0.9 * (left - left_interp);
665 dst[n] += src[n] * left * gain_coeff;
668 pan = left * gain_coeff;
670 for (; n < nframes; ++n) {
671 dst[n] += src[n] * pan;
677 pan = (*o).desired_pan;
679 if ((pan *= gain_coeff) != 1.0f) {
683 for (nframes_t n = 0; n < nframes; ++n) {
684 dst[n] += src[n] * pan;
692 for (nframes_t n = 0; n < nframes; ++n) {
707 Multi2dPanner::distribute_automated (AudioBuffer& src, BufferSet& obufs,
708 nframes_t start, nframes_t end, nframes_t nframes,
721 Multi2dPanner::factory (Panner& p)
723 return new Multi2dPanner (p);
727 Multi2dPanner::load (istream& in, string path, uint32_t& linecnt)
733 Multi2dPanner::get_state (void)
739 Multi2dPanner::state (bool full_state)
741 XMLNode* root = new XMLNode ("StreamPanner");
743 LocaleGuard lg (X_("POSIX"));
745 snprintf (buf, sizeof (buf), "%.12g", x);
746 root->add_property (X_("x"), buf);
747 snprintf (buf, sizeof (buf), "%.12g", y);
748 root->add_property (X_("y"), buf);
749 root->add_property (X_("type"), Multi2dPanner::name);
751 /* XXX no meaningful automation yet */
757 Multi2dPanner::set_state (const XMLNode& node)
759 const XMLProperty* prop;
761 LocaleGuard lg (X_("POSIX"));
766 if ((prop = node.property (X_("x")))) {
767 newx = atof (prop->value().c_str());
770 if ((prop = node.property (X_("y")))) {
771 newy = atof (prop->value().c_str());
774 if (x < 0 || y < 0) {
775 error << _("badly-formed positional data for Multi2dPanner - ignored")
780 set_position (newx, newy);
784 /*---------------------------------------------------------------------- */
786 Panner::Panner (string name, Session& s)
792 _link_direction = SameDirection;
801 Panner::set_linked (bool yn)
805 _session.set_dirty ();
806 LinkStateChanged (); /* EMIT SIGNAL */
811 Panner::set_link_direction (LinkDirection ld)
813 if (ld != _link_direction) {
814 _link_direction = ld;
815 _session.set_dirty ();
816 LinkStateChanged (); /* EMIT SIGNAL */
821 Panner::set_bypassed (bool yn)
823 if (yn != _bypassed) {
831 Panner::reset (uint32_t nouts, uint32_t npans)
834 bool changed = false;
836 if (nouts < 2 || (nouts == outputs.size() && npans == size())) {
859 fatal << _("programming error:")
860 << X_("Panner::reset() called with a single output")
867 outputs.push_back (Output (0, 0));
868 outputs.push_back (Output (1.0, 0));
870 for (n = 0; n < npans; ++n) {
871 push_back (new EqualPowerStereoPanner (*this));
876 outputs.push_back (Output (0.5, 0));
877 outputs.push_back (Output (0, 1.0));
878 outputs.push_back (Output (1.0, 1.0));
880 for (n = 0; n < npans; ++n) {
881 push_back (new Multi2dPanner (*this));
887 outputs.push_back (Output (0, 0));
888 outputs.push_back (Output (1.0, 0));
889 outputs.push_back (Output (1.0, 1.0));
890 outputs.push_back (Output (0, 1.0));
892 for (n = 0; n < npans; ++n) {
893 push_back (new Multi2dPanner (*this));
898 case 5: //square+offcenter center
899 outputs.push_back (Output (0, 0));
900 outputs.push_back (Output (1.0, 0));
901 outputs.push_back (Output (1.0, 1.0));
902 outputs.push_back (Output (0, 1.0));
903 outputs.push_back (Output (0.5, 0.75));
905 for (n = 0; n < npans; ++n) {
906 push_back (new Multi2dPanner (*this));
912 /* XXX horrible placement. FIXME */
913 for (n = 0; n < nouts; ++n) {
914 outputs.push_back (Output (0.1 * n, 0.1 * n));
917 for (n = 0; n < npans; ++n) {
918 push_back (new Multi2dPanner (*this));
924 for (iterator x = begin(); x != end(); ++x) {
928 /* force hard left/right panning in a common case: 2in/2out
931 if (npans == 2 && outputs.size() == 2) {
933 /* Do this only if we changed configuration, or our configuration
934 appears to be the default set up (center).
940 front()->get_position (left);
941 back()->get_position (right);
943 if (changed || ((left == 0.5) && (right == 0.5))) {
945 front()->set_position (0.0);
946 front()->automation().reset_default (0.0);
948 back()->set_position (1.0);
949 back()->automation().reset_default (1.0);
956 Changed (); /* EMIT SIGNAL */
963 Panner::remove (uint32_t which)
965 vector<StreamPanner*>::iterator i;
966 for (i = begin(); i != end() && which; ++i, --which);
977 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
981 vector<StreamPanner*>::clear ();
985 Panner::set_automation_style (AutoStyle style)
987 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
988 (*i)->set_automation_style (style);
990 _session.set_dirty ();
994 Panner::set_automation_state (AutoState state)
996 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
997 (*i)->set_automation_state (state);
999 _session.set_dirty ();
1003 Panner::automation_state () const
1006 return front()->automation().automation_state ();
1013 Panner::automation_style () const
1016 return front()->automation().automation_style ();
1023 Panner::transport_stopped (nframes_t frame)
1025 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1026 (*i)->transport_stopped (frame);
1031 Panner::snapshot (nframes_t now)
1033 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1034 (*i)->snapshot (now);
1039 Panner::clear_automation ()
1041 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1042 (*i)->automation().clear ();
1044 _session.set_dirty ();
1050 StreamPanner* (*factory)(Panner&);
1053 PanPlugins pan_plugins[] = {
1054 { EqualPowerStereoPanner::name, 2, EqualPowerStereoPanner::factory },
1055 { Multi2dPanner::name, 3, Multi2dPanner::factory },
1056 { string (""), 0, 0 }
1060 Panner::get_state (void)
1062 return state (true);
1066 Panner::state (bool full)
1068 XMLNode* root = new XMLNode (X_("Panner"));
1071 root->add_property (X_("linked"), (_linked ? "yes" : "no"));
1072 root->add_property (X_("link_direction"), enum_2_string (_link_direction));
1073 root->add_property (X_("bypassed"), (bypassed() ? "yes" : "no"));
1075 /* add each output */
1077 for (vector<Panner::Output>::iterator o = outputs.begin(); o != outputs.end(); ++o) {
1078 XMLNode* onode = new XMLNode (X_("Output"));
1079 snprintf (buf, sizeof (buf), "%.12g", (*o).x);
1080 onode->add_property (X_("x"), buf);
1081 snprintf (buf, sizeof (buf), "%.12g", (*o).y);
1082 onode->add_property (X_("y"), buf);
1083 root->add_child_nocopy (*onode);
1086 for (vector<StreamPanner*>::const_iterator i = begin(); i != end(); ++i) {
1087 root->add_child_nocopy ((*i)->state (full));
1094 Panner::set_state (const XMLNode& node)
1097 XMLNodeConstIterator niter;
1098 const XMLProperty *prop;
1101 LocaleGuard lg (X_("POSIX"));
1106 if ((prop = node.property (X_("linked"))) != 0) {
1107 set_linked (prop->value() == "yes");
1111 if ((prop = node.property (X_("bypassed"))) != 0) {
1112 set_bypassed (prop->value() == "yes");
1115 if ((prop = node.property (X_("link_direction"))) != 0) {
1116 LinkDirection ld; /* here to provide type information */
1117 set_link_direction (LinkDirection (string_2_enum (prop->value(), ld)));
1120 nlist = node.children();
1122 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1123 if ((*niter)->name() == X_("Output")) {
1127 prop = (*niter)->property (X_("x"));
1128 sscanf (prop->value().c_str(), "%g", &x);
1130 prop = (*niter)->property (X_("y"));
1131 sscanf (prop->value().c_str(), "%g", &y);
1133 outputs.push_back (Output (x, y));
1137 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1139 if ((*niter)->name() == X_("StreamPanner")) {
1141 if ((prop = (*niter)->property (X_("type")))) {
1143 for (i = 0; pan_plugins[i].factory; ++i) {
1144 if (prop->value() == pan_plugins[i].name) {
1147 /* note that we assume that all the stream panners
1148 are of the same type. pretty good
1149 assumption, but its still an assumption.
1152 sp = pan_plugins[i].factory (*this);
1154 if (sp->set_state (**niter) == 0) {
1163 if (!pan_plugins[i].factory) {
1164 error << string_compose (_("Unknown panner plugin \"%1\" found in pan state - ignored"),
1170 error << _("panner plugin node has no type information!")
1178 /* don't try to do old-school automation loading if it wasn't marked as existing */
1180 if ((prop = node.property (X_("automation")))) {
1182 /* automation path is relative */
1184 automation_path = _session.automation_dir();
1185 automation_path += prop->value ();
1194 Panner::touching () const
1196 for (vector<StreamPanner*>::const_iterator i = begin(); i != end(); ++i) {
1197 if ((*i)->automation().touching ()) {
1206 Panner::set_position (float xpos, StreamPanner& orig)
1212 orig.get_position (xnow);
1213 xdelta = xpos - xnow;
1215 if (_link_direction == SameDirection) {
1217 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1219 (*i)->set_position (xpos, true);
1221 (*i)->get_position (xnow);
1222 xnew = min (1.0f, xnow + xdelta);
1223 xnew = max (0.0f, xnew);
1224 (*i)->set_position (xnew, true);
1230 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1232 (*i)->set_position (xpos, true);
1234 (*i)->get_position (xnow);
1235 xnew = min (1.0f, xnow - xdelta);
1236 xnew = max (0.0f, xnew);
1237 (*i)->set_position (xnew, true);
1244 Panner::set_position (float xpos, float ypos, StreamPanner& orig)
1247 float xdelta, ydelta;
1250 orig.get_position (xnow, ynow);
1251 xdelta = xpos - xnow;
1252 ydelta = ypos - ynow;
1254 if (_link_direction == SameDirection) {
1256 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1258 (*i)->set_position (xpos, ypos, true);
1260 (*i)->get_position (xnow, ynow);
1262 xnew = min (1.0f, xnow + xdelta);
1263 xnew = max (0.0f, xnew);
1265 ynew = min (1.0f, ynow + ydelta);
1266 ynew = max (0.0f, ynew);
1268 (*i)->set_position (xnew, ynew, true);
1274 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1276 (*i)->set_position (xpos, ypos, true);
1278 (*i)->get_position (xnow, ynow);
1280 xnew = min (1.0f, xnow - xdelta);
1281 xnew = max (0.0f, xnew);
1283 ynew = min (1.0f, ynow - ydelta);
1284 ynew = max (0.0f, ynew);
1286 (*i)->set_position (xnew, ynew, true);
1293 Panner::set_position (float xpos, float ypos, float zpos, StreamPanner& orig)
1295 float xnow, ynow, znow;
1296 float xdelta, ydelta, zdelta;
1297 float xnew, ynew, znew;
1299 orig.get_position (xnow, ynow, znow);
1300 xdelta = xpos - xnow;
1301 ydelta = ypos - ynow;
1302 zdelta = zpos - znow;
1304 if (_link_direction == SameDirection) {
1306 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1308 (*i)->set_position (xpos, ypos, zpos, true);
1310 (*i)->get_position (xnow, ynow, znow);
1312 xnew = min (1.0f, xnow + xdelta);
1313 xnew = max (0.0f, xnew);
1315 ynew = min (1.0f, ynow + ydelta);
1316 ynew = max (0.0f, ynew);
1318 znew = min (1.0f, znow + zdelta);
1319 znew = max (0.0f, znew);
1321 (*i)->set_position (xnew, ynew, znew, true);
1327 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1329 (*i)->set_position (xpos, ypos, true);
1331 (*i)->get_position (xnow, ynow, znow);
1333 xnew = min (1.0f, xnow - xdelta);
1334 xnew = max (0.0f, xnew);
1336 ynew = min (1.0f, ynow - ydelta);
1337 ynew = max (0.0f, ynew);
1339 znew = min (1.0f, znow + zdelta);
1340 znew = max (0.0f, znew);
1342 (*i)->set_position (xnew, ynew, znew, true);
1349 Panner::distribute_no_automation (BufferSet& inbufs, BufferSet& outbufs, nframes_t nframes, nframes_t offset, gain_t gain_coeff)
1351 if (outbufs.count().get(DataType::AUDIO) == 0) {
1352 // Don't want to lose audio...
1353 assert(inbufs.count().get(DataType::AUDIO) == 0);
1357 // We shouldn't be called in the first place...
1358 assert(!bypassed());
1362 if (outbufs.count().get(DataType::AUDIO) == 1) {
1364 AudioBuffer& dst = outbufs.get_audio(0);
1366 if (gain_coeff == 0.0f) {
1368 /* only one output, and gain was zero, so make it silent */
1370 dst.silence(offset);
1372 } else if (gain_coeff == 1.0f){
1374 /* mix all buffers into the output */
1377 dst.read_from(inbufs.get_audio(0), nframes, offset);
1379 // accumulate starting with the second
1380 BufferSet::audio_iterator i = inbufs.audio_begin();
1381 for (++i; i != inbufs.audio_end(); ++i) {
1382 dst.accumulate_from(*i, nframes, offset);
1387 /* mix all buffers into the output, scaling them all by the gain */
1390 dst.read_from(inbufs.get_audio(0), nframes, offset);
1392 // accumulate (with gain) starting with the second
1393 BufferSet::audio_iterator i = inbufs.audio_begin();
1394 for (++i; i != inbufs.audio_end(); ++i) {
1395 dst.accumulate_with_gain_from(*i, nframes, offset, gain_coeff);
1403 // More than 1 output, we should have 1 panner for each input
1404 assert(size() == inbufs.count().get(DataType::AUDIO));
1406 /* the terrible silence ... */
1407 for (BufferSet::audio_iterator i = outbufs.audio_begin(); i != outbufs.audio_end(); ++i) {
1408 i->silence(nframes, offset);
1411 BufferSet::audio_iterator i = inbufs.audio_begin();
1412 for (iterator pan = begin(); pan != end(); ++pan, ++i) {
1413 (*pan)->distribute (*i, outbufs, gain_coeff, nframes);
1418 Panner::distribute (BufferSet& inbufs, BufferSet& outbufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset)
1420 if (outbufs.count().get(DataType::AUDIO) == 0) {
1421 // Failing to deliver audio we were asked to deliver is a bug
1422 assert(inbufs.count().get(DataType::AUDIO) == 0);
1426 // We shouldn't be called in the first place...
1427 assert(!bypassed());
1430 // If we shouldn't play automation defer to distribute_no_automation
1431 if ( !( automation_state() & Play ||
1432 ((automation_state() & Touch) && !touching()) ) ) {
1435 gain_t gain_coeff = 1.0;
1436 if (fabsf(_session.transport_speed()) > 1.5f) {
1437 gain_coeff = speed_quietning;
1440 distribute_no_automation(inbufs, outbufs, nframes, offset, gain_coeff);
1444 // Otherwise.. let the automation flow, baby
1446 if (outbufs.count().get(DataType::AUDIO) == 1) {
1448 AudioBuffer& dst = outbufs.get_audio(0);
1450 // FIXME: apply gain automation?
1453 dst.read_from(inbufs.get_audio(0), nframes, offset);
1455 // accumulate starting with the second
1456 BufferSet::audio_iterator i = inbufs.audio_begin();
1457 for (++i; i != inbufs.audio_end(); ++i) {
1458 dst.accumulate_from(*i, nframes, offset);
1464 // More than 1 output, we should have 1 panner for each input
1465 assert(size() == inbufs.count().get(DataType::AUDIO));
1467 /* the terrible silence ... */
1468 for (BufferSet::audio_iterator i = outbufs.audio_begin(); i != outbufs.audio_end(); ++i) {
1469 i->silence(nframes, offset);
1472 BufferSet::audio_iterator i = inbufs.audio_begin();
1473 for (iterator pan = begin(); pan != end(); ++pan, ++i) {
1474 (*pan)->distribute_automated (*i, outbufs, start_frame, end_frame, nframes, _session.pan_automation_buffer());
1478 /* old school automation handling */
1481 Panner::set_name (string str)
1483 automation_path = _session.automation_dir();
1484 automation_path += _session.snap_name();
1485 automation_path += "-pan-";
1486 automation_path += legalize_for_path (str);
1487 automation_path += ".automation";
1494 uint32_t linecnt = 0;
1497 LocaleGuard lg (X_("POSIX"));
1499 if (automation_path.length() == 0) {
1503 if (access (automation_path.c_str(), F_OK)) {
1507 ifstream in (automation_path.c_str());
1510 error << string_compose (_("cannot open pan automation file %1 (%2)"),
1511 automation_path, strerror (errno))
1518 while (in.getline (line, sizeof(line), '\n')) {
1520 if (++linecnt == 1) {
1521 if (memcmp (line, X_("version"), 7) == 0) {
1522 if (sscanf (line, "version %f", &version) != 1) {
1523 error << string_compose(_("badly formed version number in pan automation event file \"%1\""), automation_path) << endmsg;
1527 error << string_compose(_("no version information in pan automation event file \"%1\" (first line = %2)"),
1528 automation_path, line) << endmsg;
1535 if (strlen (line) == 0 || line[0] == '#') {
1539 if (strcmp (line, "begin") == 0) {
1542 error << string_compose (_("too many panner states found in pan automation file %1"),
1548 if ((*sp)->load (in, automation_path, linecnt)) {