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_("controllable")) {
549 if ((prop = (*iter)->property("name")) != 0 && prop->value() == "panner") {
550 _control.set_state (**iter);
553 } else if ((*iter)->name() == X_("Automation")) {
555 _automation.set_state (*((*iter)->children().front()));
557 if (_automation.automation_state() != Off) {
558 set_position (_automation.eval (parent.session().transport_frame()));
566 /*----------------------------------------------------------------------*/
568 Multi2dPanner::Multi2dPanner (Panner& p)
569 : StreamPanner (p), _automation (0.0, 1.0, 0.5) // XXX useless
574 Multi2dPanner::~Multi2dPanner ()
579 Multi2dPanner::snapshot (nframes_t now)
585 Multi2dPanner::transport_stopped (nframes_t frame)
591 Multi2dPanner::set_automation_style (AutoStyle style)
597 Multi2dPanner::set_automation_state (AutoState state)
603 Multi2dPanner::update ()
605 static const float BIAS = FLT_MIN;
607 uint32_t nouts = parent.outputs.size();
614 for (i = 0; i < nouts; i++) {
615 dsq[i] = ((x - parent.outputs[i].x) * (x - parent.outputs[i].x) + (y - parent.outputs[i].y) * (y - parent.outputs[i].y) + BIAS);
619 f += dsq[i] * dsq[i];
622 // terrible hack to support OSX < 10.3.9 builds
623 fr = (float) (1.0 / sqrt((double)f));
627 for (i = 0; i < nouts; ++i) {
628 parent.outputs[i].desired_pan = 1.0f - (dsq[i] * fr);
635 Multi2dPanner::distribute (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes)
639 vector<Panner::Output>::iterator o;
646 Sample* const src = srcbuf.data(nframes);
649 for (n = 0, o = parent.outputs.begin(); o != parent.outputs.end(); ++o, ++n) {
651 dst = obufs.get_audio(n).data(nframes);
654 if (fabsf ((delta = (left_interp - desired_left))) > 0.002) { // about 1 degree of arc
656 /* interpolate over 64 frames or nframes, whichever is smaller */
658 nframes_t limit = min ((nframes_t)64, nframes);
661 delta = -(delta / (float) (limit));
663 for (n = 0; n < limit; n++) {
664 left_interp = left_interp + delta;
665 left = left_interp + 0.9 * (left - left_interp);
666 dst[n] += src[n] * left * gain_coeff;
669 pan = left * gain_coeff;
671 for (; n < nframes; ++n) {
672 dst[n] += src[n] * pan;
678 pan = (*o).desired_pan;
680 if ((pan *= gain_coeff) != 1.0f) {
684 for (nframes_t n = 0; n < nframes; ++n) {
685 dst[n] += src[n] * pan;
693 for (nframes_t n = 0; n < nframes; ++n) {
708 Multi2dPanner::distribute_automated (AudioBuffer& src, BufferSet& obufs,
709 nframes_t start, nframes_t end, nframes_t nframes,
722 Multi2dPanner::factory (Panner& p)
724 return new Multi2dPanner (p);
728 Multi2dPanner::load (istream& in, string path, uint32_t& linecnt)
734 Multi2dPanner::get_state (void)
740 Multi2dPanner::state (bool full_state)
742 XMLNode* root = new XMLNode ("StreamPanner");
744 LocaleGuard lg (X_("POSIX"));
746 snprintf (buf, sizeof (buf), "%.12g", x);
747 root->add_property (X_("x"), buf);
748 snprintf (buf, sizeof (buf), "%.12g", y);
749 root->add_property (X_("y"), buf);
750 root->add_property (X_("type"), Multi2dPanner::name);
752 /* XXX no meaningful automation yet */
758 Multi2dPanner::set_state (const XMLNode& node)
760 const XMLProperty* prop;
762 LocaleGuard lg (X_("POSIX"));
767 if ((prop = node.property (X_("x")))) {
768 newx = atof (prop->value().c_str());
771 if ((prop = node.property (X_("y")))) {
772 newy = atof (prop->value().c_str());
775 if (x < 0 || y < 0) {
776 error << _("badly-formed positional data for Multi2dPanner - ignored")
781 set_position (newx, newy);
785 /*---------------------------------------------------------------------- */
787 Panner::Panner (string name, Session& s)
793 _link_direction = SameDirection;
802 Panner::set_linked (bool yn)
806 _session.set_dirty ();
807 LinkStateChanged (); /* EMIT SIGNAL */
812 Panner::set_link_direction (LinkDirection ld)
814 if (ld != _link_direction) {
815 _link_direction = ld;
816 _session.set_dirty ();
817 LinkStateChanged (); /* EMIT SIGNAL */
822 Panner::set_bypassed (bool yn)
824 if (yn != _bypassed) {
832 Panner::reset (uint32_t nouts, uint32_t npans)
835 bool changed = false;
837 if (nouts < 2 || (nouts == outputs.size() && npans == size())) {
860 fatal << _("programming error:")
861 << X_("Panner::reset() called with a single output")
868 outputs.push_back (Output (0, 0));
869 outputs.push_back (Output (1.0, 0));
871 for (n = 0; n < npans; ++n) {
872 push_back (new EqualPowerStereoPanner (*this));
877 outputs.push_back (Output (0.5, 0));
878 outputs.push_back (Output (0, 1.0));
879 outputs.push_back (Output (1.0, 1.0));
881 for (n = 0; n < npans; ++n) {
882 push_back (new Multi2dPanner (*this));
888 outputs.push_back (Output (0, 0));
889 outputs.push_back (Output (1.0, 0));
890 outputs.push_back (Output (1.0, 1.0));
891 outputs.push_back (Output (0, 1.0));
893 for (n = 0; n < npans; ++n) {
894 push_back (new Multi2dPanner (*this));
899 case 5: //square+offcenter center
900 outputs.push_back (Output (0, 0));
901 outputs.push_back (Output (1.0, 0));
902 outputs.push_back (Output (1.0, 1.0));
903 outputs.push_back (Output (0, 1.0));
904 outputs.push_back (Output (0.5, 0.75));
906 for (n = 0; n < npans; ++n) {
907 push_back (new Multi2dPanner (*this));
913 /* XXX horrible placement. FIXME */
914 for (n = 0; n < nouts; ++n) {
915 outputs.push_back (Output (0.1 * n, 0.1 * n));
918 for (n = 0; n < npans; ++n) {
919 push_back (new Multi2dPanner (*this));
925 for (iterator x = begin(); x != end(); ++x) {
929 /* force hard left/right panning in a common case: 2in/2out
932 if (npans == 2 && outputs.size() == 2) {
934 /* Do this only if we changed configuration, or our configuration
935 appears to be the default set up (center).
941 front()->get_position (left);
942 back()->get_position (right);
944 if (changed || ((left == 0.5) && (right == 0.5))) {
946 front()->set_position (0.0);
947 front()->automation().reset_default (0.0);
949 back()->set_position (1.0);
950 back()->automation().reset_default (1.0);
957 Changed (); /* EMIT SIGNAL */
964 Panner::remove (uint32_t which)
966 vector<StreamPanner*>::iterator i;
967 for (i = begin(); i != end() && which; ++i, --which);
978 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
982 vector<StreamPanner*>::clear ();
986 Panner::set_automation_style (AutoStyle style)
988 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
989 (*i)->set_automation_style (style);
991 _session.set_dirty ();
995 Panner::set_automation_state (AutoState state)
997 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
998 (*i)->set_automation_state (state);
1000 _session.set_dirty ();
1004 Panner::automation_state () const
1007 return front()->automation().automation_state ();
1014 Panner::automation_style () const
1017 return front()->automation().automation_style ();
1024 Panner::transport_stopped (nframes_t frame)
1026 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1027 (*i)->transport_stopped (frame);
1032 Panner::snapshot (nframes_t now)
1034 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1035 (*i)->snapshot (now);
1040 Panner::clear_automation ()
1042 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1043 (*i)->automation().clear ();
1045 _session.set_dirty ();
1051 StreamPanner* (*factory)(Panner&);
1054 PanPlugins pan_plugins[] = {
1055 { EqualPowerStereoPanner::name, 2, EqualPowerStereoPanner::factory },
1056 { Multi2dPanner::name, 3, Multi2dPanner::factory },
1057 { string (""), 0, 0 }
1061 Panner::get_state (void)
1063 return state (true);
1067 Panner::state (bool full)
1069 XMLNode* root = new XMLNode (X_("Panner"));
1072 root->add_property (X_("linked"), (_linked ? "yes" : "no"));
1073 root->add_property (X_("link_direction"), enum_2_string (_link_direction));
1074 root->add_property (X_("bypassed"), (bypassed() ? "yes" : "no"));
1076 /* add each output */
1078 for (vector<Panner::Output>::iterator o = outputs.begin(); o != outputs.end(); ++o) {
1079 XMLNode* onode = new XMLNode (X_("Output"));
1080 snprintf (buf, sizeof (buf), "%.12g", (*o).x);
1081 onode->add_property (X_("x"), buf);
1082 snprintf (buf, sizeof (buf), "%.12g", (*o).y);
1083 onode->add_property (X_("y"), buf);
1084 root->add_child_nocopy (*onode);
1087 for (vector<StreamPanner*>::const_iterator i = begin(); i != end(); ++i) {
1088 root->add_child_nocopy ((*i)->state (full));
1095 Panner::set_state (const XMLNode& node)
1098 XMLNodeConstIterator niter;
1099 const XMLProperty *prop;
1102 LocaleGuard lg (X_("POSIX"));
1107 if ((prop = node.property (X_("linked"))) != 0) {
1108 set_linked (prop->value() == "yes");
1112 if ((prop = node.property (X_("bypassed"))) != 0) {
1113 set_bypassed (prop->value() == "yes");
1116 if ((prop = node.property (X_("link_direction"))) != 0) {
1117 LinkDirection ld; /* here to provide type information */
1118 set_link_direction (LinkDirection (string_2_enum (prop->value(), ld)));
1121 nlist = node.children();
1123 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1124 if ((*niter)->name() == X_("Output")) {
1128 prop = (*niter)->property (X_("x"));
1129 sscanf (prop->value().c_str(), "%g", &x);
1131 prop = (*niter)->property (X_("y"));
1132 sscanf (prop->value().c_str(), "%g", &y);
1134 outputs.push_back (Output (x, y));
1138 for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
1140 if ((*niter)->name() == X_("StreamPanner")) {
1142 if ((prop = (*niter)->property (X_("type")))) {
1144 for (i = 0; pan_plugins[i].factory; ++i) {
1145 if (prop->value() == pan_plugins[i].name) {
1148 /* note that we assume that all the stream panners
1149 are of the same type. pretty good
1150 assumption, but its still an assumption.
1153 sp = pan_plugins[i].factory (*this);
1155 if (sp->set_state (**niter) == 0) {
1164 if (!pan_plugins[i].factory) {
1165 error << string_compose (_("Unknown panner plugin \"%1\" found in pan state - ignored"),
1171 error << _("panner plugin node has no type information!")
1179 /* don't try to do old-school automation loading if it wasn't marked as existing */
1181 if ((prop = node.property (X_("automation")))) {
1183 /* automation path is relative */
1185 automation_path = _session.automation_dir();
1186 automation_path += prop->value ();
1195 Panner::touching () const
1197 for (vector<StreamPanner*>::const_iterator i = begin(); i != end(); ++i) {
1198 if ((*i)->automation().touching ()) {
1207 Panner::set_position (float xpos, StreamPanner& orig)
1213 orig.get_position (xnow);
1214 xdelta = xpos - xnow;
1216 if (_link_direction == SameDirection) {
1218 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1220 (*i)->set_position (xpos, true);
1222 (*i)->get_position (xnow);
1223 xnew = min (1.0f, xnow + xdelta);
1224 xnew = max (0.0f, xnew);
1225 (*i)->set_position (xnew, true);
1231 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1233 (*i)->set_position (xpos, true);
1235 (*i)->get_position (xnow);
1236 xnew = min (1.0f, xnow - xdelta);
1237 xnew = max (0.0f, xnew);
1238 (*i)->set_position (xnew, true);
1245 Panner::set_position (float xpos, float ypos, StreamPanner& orig)
1248 float xdelta, ydelta;
1251 orig.get_position (xnow, ynow);
1252 xdelta = xpos - xnow;
1253 ydelta = ypos - ynow;
1255 if (_link_direction == SameDirection) {
1257 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1259 (*i)->set_position (xpos, ypos, true);
1261 (*i)->get_position (xnow, ynow);
1263 xnew = min (1.0f, xnow + xdelta);
1264 xnew = max (0.0f, xnew);
1266 ynew = min (1.0f, ynow + ydelta);
1267 ynew = max (0.0f, ynew);
1269 (*i)->set_position (xnew, ynew, true);
1275 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1277 (*i)->set_position (xpos, ypos, true);
1279 (*i)->get_position (xnow, ynow);
1281 xnew = min (1.0f, xnow - xdelta);
1282 xnew = max (0.0f, xnew);
1284 ynew = min (1.0f, ynow - ydelta);
1285 ynew = max (0.0f, ynew);
1287 (*i)->set_position (xnew, ynew, true);
1294 Panner::set_position (float xpos, float ypos, float zpos, StreamPanner& orig)
1296 float xnow, ynow, znow;
1297 float xdelta, ydelta, zdelta;
1298 float xnew, ynew, znew;
1300 orig.get_position (xnow, ynow, znow);
1301 xdelta = xpos - xnow;
1302 ydelta = ypos - ynow;
1303 zdelta = zpos - znow;
1305 if (_link_direction == SameDirection) {
1307 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1309 (*i)->set_position (xpos, ypos, zpos, true);
1311 (*i)->get_position (xnow, ynow, znow);
1313 xnew = min (1.0f, xnow + xdelta);
1314 xnew = max (0.0f, xnew);
1316 ynew = min (1.0f, ynow + ydelta);
1317 ynew = max (0.0f, ynew);
1319 znew = min (1.0f, znow + zdelta);
1320 znew = max (0.0f, znew);
1322 (*i)->set_position (xnew, ynew, znew, true);
1328 for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
1330 (*i)->set_position (xpos, ypos, true);
1332 (*i)->get_position (xnow, ynow, znow);
1334 xnew = min (1.0f, xnow - xdelta);
1335 xnew = max (0.0f, xnew);
1337 ynew = min (1.0f, ynow - ydelta);
1338 ynew = max (0.0f, ynew);
1340 znew = min (1.0f, znow + zdelta);
1341 znew = max (0.0f, znew);
1343 (*i)->set_position (xnew, ynew, znew, true);
1350 Panner::distribute_no_automation (BufferSet& inbufs, BufferSet& outbufs, nframes_t nframes, nframes_t offset, gain_t gain_coeff)
1352 if (outbufs.count().get(DataType::AUDIO) == 0) {
1353 // Don't want to lose audio...
1354 assert(inbufs.count().get(DataType::AUDIO) == 0);
1358 // We shouldn't be called in the first place...
1359 assert(!bypassed());
1363 if (outbufs.count().get(DataType::AUDIO) == 1) {
1365 AudioBuffer& dst = outbufs.get_audio(0);
1367 if (gain_coeff == 0.0f) {
1369 /* only one output, and gain was zero, so make it silent */
1371 dst.silence(offset);
1373 } else if (gain_coeff == 1.0f){
1375 /* mix all buffers into the output */
1378 dst.read_from(inbufs.get_audio(0), nframes, offset);
1380 // accumulate starting with the second
1381 BufferSet::audio_iterator i = inbufs.audio_begin();
1382 for (++i; i != inbufs.audio_end(); ++i) {
1383 dst.accumulate_from(*i, nframes, offset);
1388 /* mix all buffers into the output, scaling them all by the gain */
1391 dst.read_from(inbufs.get_audio(0), nframes, offset);
1393 // accumulate (with gain) starting with the second
1394 BufferSet::audio_iterator i = inbufs.audio_begin();
1395 for (++i; i != inbufs.audio_end(); ++i) {
1396 dst.accumulate_with_gain_from(*i, nframes, offset, gain_coeff);
1404 // More than 1 output, we should have 1 panner for each input
1405 assert(size() == inbufs.count().get(DataType::AUDIO));
1407 /* the terrible silence ... */
1408 for (BufferSet::audio_iterator i = outbufs.audio_begin(); i != outbufs.audio_end(); ++i) {
1409 i->silence(nframes, offset);
1412 BufferSet::audio_iterator i = inbufs.audio_begin();
1413 for (iterator pan = begin(); pan != end(); ++pan, ++i) {
1414 (*pan)->distribute (*i, outbufs, gain_coeff, nframes);
1419 Panner::distribute (BufferSet& inbufs, BufferSet& outbufs, nframes_t start_frame, nframes_t end_frame, nframes_t nframes, nframes_t offset)
1421 if (outbufs.count().get(DataType::AUDIO) == 0) {
1422 // Failing to deliver audio we were asked to deliver is a bug
1423 assert(inbufs.count().get(DataType::AUDIO) == 0);
1427 // We shouldn't be called in the first place...
1428 assert(!bypassed());
1431 // If we shouldn't play automation defer to distribute_no_automation
1432 if ( !( automation_state() & Play ||
1433 ((automation_state() & Touch) && !touching()) ) ) {
1436 gain_t gain_coeff = 1.0;
1437 if (fabsf(_session.transport_speed()) > 1.5f) {
1438 gain_coeff = speed_quietning;
1441 distribute_no_automation(inbufs, outbufs, nframes, offset, gain_coeff);
1445 // Otherwise.. let the automation flow, baby
1447 if (outbufs.count().get(DataType::AUDIO) == 1) {
1449 AudioBuffer& dst = outbufs.get_audio(0);
1451 // FIXME: apply gain automation?
1454 dst.read_from(inbufs.get_audio(0), nframes, offset);
1456 // accumulate starting with the second
1457 BufferSet::audio_iterator i = inbufs.audio_begin();
1458 for (++i; i != inbufs.audio_end(); ++i) {
1459 dst.accumulate_from(*i, nframes, offset);
1465 // More than 1 output, we should have 1 panner for each input
1466 assert(size() == inbufs.count().get(DataType::AUDIO));
1468 /* the terrible silence ... */
1469 for (BufferSet::audio_iterator i = outbufs.audio_begin(); i != outbufs.audio_end(); ++i) {
1470 i->silence(nframes, offset);
1473 BufferSet::audio_iterator i = inbufs.audio_begin();
1474 for (iterator pan = begin(); pan != end(); ++pan, ++i) {
1475 (*pan)->distribute_automated (*i, outbufs, start_frame, end_frame, nframes, _session.pan_automation_buffer());
1479 /* old school automation handling */
1482 Panner::set_name (string str)
1484 automation_path = _session.automation_dir();
1485 automation_path += _session.snap_name();
1486 automation_path += "-pan-";
1487 automation_path += legalize_for_path (str);
1488 automation_path += ".automation";
1495 uint32_t linecnt = 0;
1498 LocaleGuard lg (X_("POSIX"));
1500 if (automation_path.length() == 0) {
1504 if (access (automation_path.c_str(), F_OK)) {
1508 ifstream in (automation_path.c_str());
1511 error << string_compose (_("cannot open pan automation file %1 (%2)"),
1512 automation_path, strerror (errno))
1519 while (in.getline (line, sizeof(line), '\n')) {
1521 if (++linecnt == 1) {
1522 if (memcmp (line, X_("version"), 7) == 0) {
1523 if (sscanf (line, "version %f", &version) != 1) {
1524 error << string_compose(_("badly formed version number in pan automation event file \"%1\""), automation_path) << endmsg;
1528 error << string_compose(_("no version information in pan automation event file \"%1\" (first line = %2)"),
1529 automation_path, line) << endmsg;
1536 if (strlen (line) == 0 || line[0] == '#') {
1540 if (strcmp (line, "begin") == 0) {
1543 error << string_compose (_("too many panner states found in pan automation file %1"),
1549 if ((*sp)->load (in, automation_path, linecnt)) {