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ardour/libs/ardour/panner.cc

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/*
Copyright (C) 2004 Paul Davis
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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <cmath>
#include <cerrno>
#include <fstream>
#include <cstdlib>
#include <string>
#include <cstdio>
#include <locale.h>
#include <unistd.h>
#include <float.h>
#include <glibmm.h>
#include <pbd/error.h>
#include <pbd/failed_constructor.h>
#include <pbd/xml++.h>
#include <pbd/enumwriter.h>
#include <pbd/localeguard.h>
#include <ardour/session.h>
#include <ardour/panner.h>
#include <ardour/utils.h>
#include <ardour/mix.h>
#include "i18n.h"
#include <pbd/mathfix.h>
using namespace std;
using namespace ARDOUR;
using namespace PBD;
float Panner::current_automation_version_number = 1.0;
string EqualPowerStereoPanner::name = "Equal Power Stereo";
string Multi2dPanner::name = "Multiple (2D)";
/* this is a default mapper of control values to a pan position
others can be imagined.
*/
static pan_t direct_control_to_pan (double fract) {
return fract;
}
static double direct_pan_to_control (pan_t val) {
return val;
}
StreamPanner::StreamPanner (Panner& p)
: parent (p),
_control (X_("panner"), *this)
{
_muted = false;
parent.session().add_controllable (&_control);
x = 0.5;
y = 0.5;
z = 0.5;
}
StreamPanner::~StreamPanner ()
{
}
void
StreamPanner::PanControllable::set_value (float val)
{
panner.set_position (direct_control_to_pan (val));
}
float
StreamPanner::PanControllable::get_value (void) const
{
float xpos;
panner.get_effective_position (xpos);
return direct_pan_to_control (xpos);
}
bool
StreamPanner::PanControllable::can_send_feedback () const
{
AutoState astate = panner.get_parent().automation_state ();
if ((astate == Auto_Play) || (astate == Auto_Touch && !panner.get_parent().touching())) {
return true;
}
return false;
}
void
StreamPanner::set_muted (bool yn)
{
if (yn != _muted) {
_muted = yn;
StateChanged ();
}
}
void
StreamPanner::set_position (float xpos, bool link_call)
{
if (!link_call && parent.linked()) {
parent.set_position (xpos, *this);
}
if (x != xpos) {
x = xpos;
update ();
Changed ();
_control.Changed ();
}
}
void
StreamPanner::set_position (float xpos, float ypos, bool link_call)
{
if (!link_call && parent.linked()) {
parent.set_position (xpos, ypos, *this);
}
if (x != xpos || y != ypos) {
x = xpos;
y = ypos;
update ();
Changed ();
}
}
void
StreamPanner::set_position (float xpos, float ypos, float zpos, bool link_call)
{
if (!link_call && parent.linked()) {
parent.set_position (xpos, ypos, zpos, *this);
}
if (x != xpos || y != ypos || z != zpos) {
x = xpos;
y = ypos;
z = zpos;
update ();
Changed ();
}
}
int
StreamPanner::set_state (const XMLNode& node)
{
const XMLProperty* prop;
XMLNodeConstIterator iter;
if ((prop = node.property (X_("muted")))) {
set_muted (string_is_affirmative (prop->value()));
}
return 0;
}
void
StreamPanner::add_state (XMLNode& node)
{
node.add_property (X_("muted"), (muted() ? "yes" : "no"));
}
/*---------------------------------------------------------------------- */
BaseStereoPanner::BaseStereoPanner (Panner& p)
: StreamPanner (p), _automation (0.0, 1.0, 0.5)
{
}
BaseStereoPanner::~BaseStereoPanner ()
{
}
void
BaseStereoPanner::snapshot (nframes_t now)
{
if (_automation.automation_write () && parent.session().transport_rolling()) {
_automation.rt_add (now, x);
}
}
void
BaseStereoPanner::transport_stopped (nframes_t frame)
{
if (_automation.automation_state() == Auto_Touch || _automation.automation_state() == Auto_Play) {
set_position (_automation.eval (frame));
}
_automation.write_pass_finished (frame);
}
void
BaseStereoPanner::set_automation_style (AutoStyle style)
{
_automation.set_automation_style (style);
}
void
BaseStereoPanner::set_automation_state (AutoState state)
{
if (state != _automation.automation_state()) {
_automation.set_automation_state (state);
/* don't reset pan if we're moving to Off or Write mode;
if we're moving to Write, the user may have manually set up pans
that they don't want to lose */
if (state != Auto_Off && state != Auto_Write) {
set_position (_automation.eval (parent.session().transport_frame()));
}
}
}
int
BaseStereoPanner::load (istream& in, string path, uint32_t& linecnt)
{
char line[128];
LocaleGuard lg (X_("POSIX"));
_automation.clear ();
while (in.getline (line, sizeof (line), '\n')) {
jack_nframes_t when;
double value;
++linecnt;
if (strcmp (line, "end") == 0) {
break;
}
if (sscanf (line, "%" PRIu32 " %lf", &when, &value) != 2) {
warning << string_compose(_("badly formatted pan automation event record at line %1 of %2 (ignored) [%3]"), linecnt, path, line) << endmsg;
continue;
}
_automation.fast_simple_add (when, value);
}
/* now that we are done loading */
_automation.StateChanged ();
return 0;
}
void
BaseStereoPanner::distribute (Sample* src, Sample** obufs, gain_t gain_coeff, nframes_t nframes)
{
pan_t delta;
Sample* dst;
pan_t pan;
if (_muted) {
return;
}
/* LEFT */
dst = obufs[0];
if (fabsf ((delta = (left - desired_left))) > 0.002) { // about 1 degree of arc
/* interpolate over 64 frames or nframes, whichever is smaller */
nframes_t limit = min ((nframes_t)64, nframes);
nframes_t n;
delta = -(delta / (float) (limit));
for (n = 0; n < limit; n++) {
left_interp = left_interp + delta;
left = left_interp + 0.9 * (left - left_interp);
dst[n] += src[n] * left * gain_coeff;
}
pan = left * gain_coeff;
Session::mix_buffers_with_gain(dst+n,src+n,nframes-n,pan);
} else {
left = desired_left;
left_interp = left;
if ((pan = (left * gain_coeff)) != 1.0f) {
if (pan != 0.0f) {
Session::mix_buffers_with_gain(dst,src,nframes,pan);
/* mark that we wrote into the buffer */
// obufs[0] = 0;
}
} else {
Session::mix_buffers_no_gain(dst,src,nframes);
/* mark that we wrote into the buffer */
// obufs[0] = 0;
}
}
/* RIGHT */
dst = obufs[1];
if (fabsf ((delta = (right - desired_right))) > 0.002) { // about 1 degree of arc
/* interpolate over 64 frames or nframes, whichever is smaller */
nframes_t limit = min ((nframes_t)64, nframes);
nframes_t n;
delta = -(delta / (float) (limit));
for (n = 0; n < limit; n++) {
right_interp = right_interp + delta;
right = right_interp + 0.9 * (right - right_interp);
dst[n] += src[n] * right * gain_coeff;
}
pan = right * gain_coeff;
Session::mix_buffers_with_gain(dst+n,src+n,nframes-n,pan);
/* XXX it would be nice to mark the buffer as written to */
} else {
right = desired_right;
right_interp = right;
if ((pan = (right * gain_coeff)) != 1.0f) {
if (pan != 0.0f) {
Session::mix_buffers_with_gain(dst,src,nframes,pan);
/* XXX it would be nice to mark the buffer as written to */
}
} else {
Session::mix_buffers_no_gain(dst,src,nframes);
/* XXX it would be nice to mark the buffer as written to */
}
}
}
/*---------------------------------------------------------------------- */
EqualPowerStereoPanner::EqualPowerStereoPanner (Panner& p)
: BaseStereoPanner (p)
{
update ();
left = desired_left;
right = desired_right;
left_interp = left;
right_interp = right;
}
EqualPowerStereoPanner::~EqualPowerStereoPanner ()
{
}
void
EqualPowerStereoPanner::update ()
{
/* it would be very nice to split this out into a virtual function
that can be accessed from BaseStereoPanner and used in distribute_automated().
but the place where its used in distribute_automated() is a tight inner loop,
and making "nframes" virtual function calls to compute values is an absurd
overhead.
*/
/* x == 0 => hard left
x == 1 => hard right
*/
float panR = x;
float panL = 1 - panR;
const float pan_law_attenuation = -3.0f;
const float scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
desired_left = panL * (scale * panL + 1.0f - scale);
desired_right = panR * (scale * panR + 1.0f - scale);
effective_x = x;
}
void
EqualPowerStereoPanner::distribute_automated (Sample* src, Sample** obufs,
nframes_t start, nframes_t end, nframes_t nframes,
pan_t** buffers)
{
Sample* dst;
pan_t* pbuf;
/* fetch positional data */
if (!_automation.rt_safe_get_vector (start, end, buffers[0], nframes)) {
/* fallback */
if (!_muted) {
distribute (src, obufs, 1.0, nframes);
}
return;
}
/* store effective pan position. do this even if we are muted */
if (nframes > 0)
effective_x = buffers[0][nframes-1];
if (_muted) {
return;
}
/* apply pan law to convert positional data into pan coefficients for
each buffer (output)
*/
const float pan_law_attenuation = -3.0f;
const float scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
for (nframes_t n = 0; n < nframes; ++n) {
float panR = buffers[0][n];
float panL = 1 - panR;
buffers[0][n] = panL * (scale * panL + 1.0f - scale);
buffers[1][n] = panR * (scale * panR + 1.0f - scale);
}
/* LEFT */
dst = obufs[0];
pbuf = buffers[0];
for (nframes_t n = 0; n < nframes; ++n) {
dst[n] += src[n] * pbuf[n];
}
/* XXX it would be nice to mark the buffer as written to */
/* RIGHT */
dst = obufs[1];
pbuf = buffers[1];
for (nframes_t n = 0; n < nframes; ++n) {
dst[n] += src[n] * pbuf[n];
}
/* XXX it would be nice to mark the buffer as written to */
}
StreamPanner*
EqualPowerStereoPanner::factory (Panner& parent)
{
return new EqualPowerStereoPanner (parent);
}
XMLNode&
EqualPowerStereoPanner::get_state (void)
{
return state (true);
}
XMLNode&
EqualPowerStereoPanner::state (bool full_state)
{
XMLNode* root = new XMLNode ("StreamPanner");
char buf[64];
LocaleGuard lg (X_("POSIX"));
snprintf (buf, sizeof (buf), "%.12g", x);
root->add_property (X_("x"), buf);
root->add_property (X_("type"), EqualPowerStereoPanner::name);
XMLNode* autonode = new XMLNode (X_("Automation"));
autonode->add_child_nocopy (_automation.state (full_state));
root->add_child_nocopy (*autonode);
StreamPanner::add_state (*root);
root->add_child_nocopy (_control.get_state ());
return *root;
}
int
EqualPowerStereoPanner::set_state (const XMLNode& node)
{
const XMLProperty* prop;
float pos;
LocaleGuard lg (X_("POSIX"));
if ((prop = node.property (X_("x")))) {
pos = atof (prop->value().c_str());
set_position (pos, true);
}
StreamPanner::set_state (node);
for (XMLNodeConstIterator iter = node.children().begin(); iter != node.children().end(); ++iter) {
if ((*iter)->name() == X_("controllable")) {
if ((prop = (*iter)->property("name")) != 0 && prop->value() == "panner") {
_control.set_state (**iter);
}
} else if ((*iter)->name() == X_("Automation")) {
_automation.set_state (*((*iter)->children().front()));
if (_automation.automation_state() != Auto_Off) {
set_position (_automation.eval (parent.session().transport_frame()));
}
}
}
return 0;
}
/*----------------------------------------------------------------------*/
Multi2dPanner::Multi2dPanner (Panner& p)
: StreamPanner (p), _automation (0.0, 1.0, 0.5) // XXX useless
{
update ();
}
Multi2dPanner::~Multi2dPanner ()
{
}
void
Multi2dPanner::snapshot (nframes_t now)
{
// how?
}
void
Multi2dPanner::transport_stopped (nframes_t frame)
{
//what?
}
void
Multi2dPanner::set_automation_style (AutoStyle style)
{
//what?
}
void
Multi2dPanner::set_automation_state (AutoState state)
{
// what?
}
void
Multi2dPanner::update ()
{
static const float BIAS = FLT_MIN;
uint32_t i;
uint32_t nouts = parent.outputs.size();
float dsq[nouts];
float f, fr;
vector<pan_t> pans;
f = 0.0f;
for (i = 0; i < nouts; i++) {
dsq[i] = ((x - parent.outputs[i].x) * (x - parent.outputs[i].x) + (y - parent.outputs[i].y) * (y - parent.outputs[i].y) + BIAS);
if (dsq[i] < 0.0) {
dsq[i] = 0.0;
}
f += dsq[i] * dsq[i];
}
#ifdef __APPLE__
// terrible hack to support OSX < 10.3.9 builds
fr = (float) (1.0 / sqrt((double)f));
#else
fr = 1.0 / sqrtf(f);
#endif
for (i = 0; i < nouts; ++i) {
parent.outputs[i].desired_pan = 1.0f - (dsq[i] * fr);
}
effective_x = x;
}
void
Multi2dPanner::distribute (Sample* src, Sample** obufs, gain_t gain_coeff, nframes_t nframes)
{
Sample* dst;
pan_t pan;
vector<Panner::Output>::iterator o;
uint32_t n;
if (_muted) {
return;
}
for (n = 0, o = parent.outputs.begin(); o != parent.outputs.end(); ++o, ++n) {
dst = obufs[n];
#ifdef CAN_INTERP
if (fabsf ((delta = (left_interp - desired_left))) > 0.002) { // about 1 degree of arc
/* interpolate over 64 frames or nframes, whichever is smaller */
nframes_t limit = min ((nframes_t)64, nframes);
nframes_t n;
delta = -(delta / (float) (limit));
for (n = 0; n < limit; n++) {
left_interp = left_interp + delta;
left = left_interp + 0.9 * (left - left_interp);
dst[n] += src[n] * left * gain_coeff;
}
pan = left * gain_coeff;
Session::mix_buffers_with_gain(dst+n,src+n,nframes-n,pan);
} else {
#else
pan = (*o).desired_pan;
if ((pan *= gain_coeff) != 1.0f) {
if (pan != 0.0f) {
Session::mix_buffers_with_gain(dst,src,nframes,pan);
}
} else {
Session::mix_buffers_no_gain(dst,src,nframes);
}
#endif
#ifdef CAN_INTERP
}
#endif
}
return;
}
void
Multi2dPanner::distribute_automated (Sample* src, Sample** obufs,
nframes_t start, nframes_t end, nframes_t nframes,
pan_t** buffers)
{
if (_muted) {
return;
}
/* what ? */
return;
}
StreamPanner*
Multi2dPanner::factory (Panner& p)
{
return new Multi2dPanner (p);
}
int
Multi2dPanner::load (istream& in, string path, uint32_t& linecnt)
{
return 0;
}
XMLNode&
Multi2dPanner::get_state (void)
{
return state (true);
}
XMLNode&
Multi2dPanner::state (bool full_state)
{
XMLNode* root = new XMLNode ("StreamPanner");
char buf[64];
LocaleGuard lg (X_("POSIX"));
snprintf (buf, sizeof (buf), "%.12g", x);
root->add_property (X_("x"), buf);
snprintf (buf, sizeof (buf), "%.12g", y);
root->add_property (X_("y"), buf);
root->add_property (X_("type"), Multi2dPanner::name);
/* XXX no meaningful automation yet */
return *root;
}
int
Multi2dPanner::set_state (const XMLNode& node)
{
const XMLProperty* prop;
float newx,newy;
LocaleGuard lg (X_("POSIX"));
newx = -1;
newy = -1;
if ((prop = node.property (X_("x")))) {
newx = atof (prop->value().c_str());
}
if ((prop = node.property (X_("y")))) {
newy = atof (prop->value().c_str());
}
if (x < 0 || y < 0) {
error << _("badly-formed positional data for Multi2dPanner - ignored")
<< endmsg;
return -1;
}
set_position (newx, newy);
return 0;
}
/*---------------------------------------------------------------------- */
Panner::Panner (string name, Session& s)
: _session (s)
{
set_name (name);
_linked = false;
_link_direction = SameDirection;
_bypassed = false;
}
Panner::~Panner ()
{
}
void
Panner::set_linked (bool yn)
{
if (yn != _linked) {
_linked = yn;
_session.set_dirty ();
LinkStateChanged (); /* EMIT SIGNAL */
}
}
void
Panner::set_link_direction (LinkDirection ld)
{
if (ld != _link_direction) {
_link_direction = ld;
_session.set_dirty ();
LinkStateChanged (); /* EMIT SIGNAL */
}
}
void
Panner::set_bypassed (bool yn)
{
if (yn != _bypassed) {
_bypassed = yn;
StateChanged ();
}
}
void
Panner::reset_to_default ()
{
vector<float> positions;
switch (outputs.size()) {
case 0:
case 1:
return;
}
if (outputs.size() == 2) {
switch (size()) {
case 1:
front()->set_position (0.5);
front()->automation().reset_default (0.5);
return;
break;
case 2:
front()->set_position (0.0);
front()->automation().reset_default (0.0);
back()->set_position (1.0);
back()->automation().reset_default (1.0);
return;
default:
break;
}
}
vector<Output>::iterator o;
iterator p;
for (o = outputs.begin(), p = begin(); o != outputs.end() && p != end(); ++o, ++p) {
(*p)->set_position ((*o).x, (*o).y);
}
}
void
Panner::reset_streampanner (uint32_t which)
{
if (which >= size() || which >= outputs.size()) {
return;
}
switch (outputs.size()) {
case 0:
case 1:
return;
case 2:
switch (size()) {
case 1:
/* stereo out, 1 stream, default = middle */
front()->set_position (0.5);
front()->automation().reset_default (0.5);
break;
case 2:
/* stereo out, 2 streams, default = hard left/right */
if (which == 0) {
front()->set_position (0.0);
front()->automation().reset_default (0.0);
} else {
back()->set_position (1.0);
back()->automation().reset_default (1.0);
}
break;
}
return;
default:
(*this)[which]->set_position (outputs[which].x, outputs[which].y);
}
}
void
Panner::reset (uint32_t nouts, uint32_t npans)
{
uint32_t n;
bool changed = false;
bool do_not_and_did_not_need_panning = ((nouts < 2) && (outputs.size() < 2));
/* if new and old config don't need panning, or if
the config hasn't changed, we're done.
*/
if (do_not_and_did_not_need_panning ||
((nouts == outputs.size()) && (npans == size()))) {
return;
}
n = size();
clear ();
if (n != npans) {
changed = true;
}
n = outputs.size();
outputs.clear ();
if (n != nouts) {
changed = true;
}
if (nouts < 2) {
goto send_changed;
}
switch (nouts) {
case 0:
break;
case 1:
fatal << _("programming error:")
<< X_("Panner::reset() called with a single output")
<< endmsg;
/*NOTREACHED*/
break;
case 2:
/* line */
outputs.push_back (Output (0, 0));
outputs.push_back (Output (1.0, 0));
for (n = 0; n < npans; ++n) {
push_back (new EqualPowerStereoPanner (*this));
}
break;
case 3: // triangle
outputs.push_back (Output (0.5, 0));
outputs.push_back (Output (0, 1.0));
outputs.push_back (Output (1.0, 1.0));
for (n = 0; n < npans; ++n) {
push_back (new Multi2dPanner (*this));
}
break;
case 4: // square
outputs.push_back (Output (0, 0));
outputs.push_back (Output (1.0, 0));
outputs.push_back (Output (1.0, 1.0));
outputs.push_back (Output (0, 1.0));
for (n = 0; n < npans; ++n) {
push_back (new Multi2dPanner (*this));
}
break;
case 5: //square+offcenter center
outputs.push_back (Output (0, 0));
outputs.push_back (Output (1.0, 0));
outputs.push_back (Output (1.0, 1.0));
outputs.push_back (Output (0, 1.0));
outputs.push_back (Output (0.5, 0.75));
for (n = 0; n < npans; ++n) {
push_back (new Multi2dPanner (*this));
}
break;
default:
/* XXX horrible placement. FIXME */
for (n = 0; n < nouts; ++n) {
outputs.push_back (Output (0.1 * n, 0.1 * n));
}
for (n = 0; n < npans; ++n) {
push_back (new Multi2dPanner (*this));
}
break;
}
for (iterator x = begin(); x != end(); ++x) {
(*x)->update ();
}
/* force hard left/right panning in a common case: 2in/2out
*/
if (npans == 2 && outputs.size() == 2) {
/* Do this only if we changed configuration, or our configuration
appears to be the default set up (center).
*/
float left;
float right;
front()->get_position (left);
back()->get_position (right);
if (changed || ((left == 0.5) && (right == 0.5))) {
front()->set_position (0.0);
front()->automation().reset_default (0.0);
back()->set_position (1.0);
back()->automation().reset_default (1.0);
changed = true;
}
}
send_changed:
if (changed) {
Changed (); /* EMIT SIGNAL */
}
return;
}
void
Panner::remove (uint32_t which)
{
vector<StreamPanner*>::iterator i;
for (i = begin(); i != end() && which; ++i, --which);
if (i != end()) {
delete *i;
erase (i);
}
}
void
Panner::clear ()
{
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
delete *i;
}
vector<StreamPanner*>::clear ();
}
void
Panner::set_automation_style (AutoStyle style)
{
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
(*i)->set_automation_style (style);
}
_session.set_dirty ();
}
void
Panner::set_automation_state (AutoState state)
{
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
(*i)->set_automation_state (state);
}
_session.set_dirty ();
}
AutoState
Panner::automation_state () const
{
if (!empty()) {
return front()->automation().automation_state ();
} else {
return Auto_Off;
}
}
AutoStyle
Panner::automation_style () const
{
if (!empty()) {
return front()->automation().automation_style ();
} else {
return Auto_Absolute;
}
}
void
Panner::transport_stopped (nframes_t frame)
{
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
(*i)->transport_stopped (frame);
}
}
void
Panner::snapshot (nframes_t now)
{
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
(*i)->snapshot (now);
}
}
void
Panner::clear_automation ()
{
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
(*i)->automation().clear ();
}
_session.set_dirty ();
}
struct PanPlugins {
string name;
uint32_t nouts;
StreamPanner* (*factory)(Panner&);
};
PanPlugins pan_plugins[] = {
{ EqualPowerStereoPanner::name, 2, EqualPowerStereoPanner::factory },
{ Multi2dPanner::name, 3, Multi2dPanner::factory },
{ string (""), 0, 0 }
};
XMLNode&
Panner::get_state (void)
{
return state (true);
}
XMLNode&
Panner::state (bool full)
{
XMLNode* root = new XMLNode (X_("Panner"));
char buf[32];
root->add_property (X_("linked"), (_linked ? "yes" : "no"));
root->add_property (X_("link_direction"), enum_2_string (_link_direction));
root->add_property (X_("bypassed"), (bypassed() ? "yes" : "no"));
/* add each output */
for (vector<Panner::Output>::iterator o = outputs.begin(); o != outputs.end(); ++o) {
XMLNode* onode = new XMLNode (X_("Output"));
snprintf (buf, sizeof (buf), "%.12g", (*o).x);
onode->add_property (X_("x"), buf);
snprintf (buf, sizeof (buf), "%.12g", (*o).y);
onode->add_property (X_("y"), buf);
root->add_child_nocopy (*onode);
}
for (vector<StreamPanner*>::const_iterator i = begin(); i != end(); ++i) {
root->add_child_nocopy ((*i)->state (full));
}
return *root;
}
int
Panner::set_state (const XMLNode& node)
{
XMLNodeList nlist;
XMLNodeConstIterator niter;
const XMLProperty *prop;
uint32_t i;
StreamPanner* sp;
LocaleGuard lg (X_("POSIX"));
clear ();
outputs.clear ();
if ((prop = node.property (X_("linked"))) != 0) {
set_linked (string_is_affirmative (prop->value()));
}
if ((prop = node.property (X_("bypassed"))) != 0) {
set_bypassed (string_is_affirmative (prop->value()));
}
if ((prop = node.property (X_("link_direction"))) != 0) {
LinkDirection ld; /* here to provide type information */
set_link_direction (LinkDirection (string_2_enum (prop->value(), ld)));
}
nlist = node.children();
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
if ((*niter)->name() == X_("Output")) {
float x, y;
prop = (*niter)->property (X_("x"));
sscanf (prop->value().c_str(), "%g", &x);
prop = (*niter)->property (X_("y"));
sscanf (prop->value().c_str(), "%g", &y);
outputs.push_back (Output (x, y));
}
}
for (niter = nlist.begin(); niter != nlist.end(); ++niter) {
if ((*niter)->name() == X_("StreamPanner")) {
if ((prop = (*niter)->property (X_("type")))) {
for (i = 0; pan_plugins[i].factory; ++i) {
if (prop->value() == pan_plugins[i].name) {
/* note that we assume that all the stream panners
are of the same type. pretty good
assumption, but its still an assumption.
*/
sp = pan_plugins[i].factory (*this);
if (sp->set_state (**niter) == 0) {
push_back (sp);
}
break;
}
}
if (!pan_plugins[i].factory) {
error << string_compose (_("Unknown panner plugin \"%1\" found in pan state - ignored"),
prop->value())
<< endmsg;
}
} else {
error << _("panner plugin node has no type information!")
<< endmsg;
return -1;
}
}
}
/* don't try to do old-school automation loading if it wasn't marked as existing */
if ((prop = node.property (X_("automation")))) {
/* automation path is relative */
automation_path = Glib::build_filename(_session.automation_dir(), prop->value ());
}
return 0;
}
bool
Panner::touching () const
{
for (vector<StreamPanner*>::const_iterator i = begin(); i != end(); ++i) {
if ((*i)->automation().touching ()) {
return true;
}
}
return false;
}
void
Panner::set_position (float xpos, StreamPanner& orig)
{
float xnow;
float xdelta ;
float xnew;
orig.get_position (xnow);
xdelta = xpos - xnow;
if (_link_direction == SameDirection) {
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
if (*i == &orig) {
(*i)->set_position (xpos, true);
} else {
(*i)->get_position (xnow);
xnew = min (1.0f, xnow + xdelta);
xnew = max (0.0f, xnew);
(*i)->set_position (xnew, true);
}
}
} else {
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
if (*i == &orig) {
(*i)->set_position (xpos, true);
} else {
(*i)->get_position (xnow);
xnew = min (1.0f, xnow - xdelta);
xnew = max (0.0f, xnew);
(*i)->set_position (xnew, true);
}
}
}
}
void
Panner::set_position (float xpos, float ypos, StreamPanner& orig)
{
float xnow, ynow;
float xdelta, ydelta;
float xnew, ynew;
orig.get_position (xnow, ynow);
xdelta = xpos - xnow;
ydelta = ypos - ynow;
if (_link_direction == SameDirection) {
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
if (*i == &orig) {
(*i)->set_position (xpos, ypos, true);
} else {
(*i)->get_position (xnow, ynow);
xnew = min (1.0f, xnow + xdelta);
xnew = max (0.0f, xnew);
ynew = min (1.0f, ynow + ydelta);
ynew = max (0.0f, ynew);
(*i)->set_position (xnew, ynew, true);
}
}
} else {
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
if (*i == &orig) {
(*i)->set_position (xpos, ypos, true);
} else {
(*i)->get_position (xnow, ynow);
xnew = min (1.0f, xnow - xdelta);
xnew = max (0.0f, xnew);
ynew = min (1.0f, ynow - ydelta);
ynew = max (0.0f, ynew);
(*i)->set_position (xnew, ynew, true);
}
}
}
}
void
Panner::set_position (float xpos, float ypos, float zpos, StreamPanner& orig)
{
float xnow, ynow, znow;
float xdelta, ydelta, zdelta;
float xnew, ynew, znew;
orig.get_position (xnow, ynow, znow);
xdelta = xpos - xnow;
ydelta = ypos - ynow;
zdelta = zpos - znow;
if (_link_direction == SameDirection) {
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
if (*i == &orig) {
(*i)->set_position (xpos, ypos, zpos, true);
} else {
(*i)->get_position (xnow, ynow, znow);
xnew = min (1.0f, xnow + xdelta);
xnew = max (0.0f, xnew);
ynew = min (1.0f, ynow + ydelta);
ynew = max (0.0f, ynew);
znew = min (1.0f, znow + zdelta);
znew = max (0.0f, znew);
(*i)->set_position (xnew, ynew, znew, true);
}
}
} else {
for (vector<StreamPanner*>::iterator i = begin(); i != end(); ++i) {
if (*i == &orig) {
(*i)->set_position (xpos, ypos, true);
} else {
(*i)->get_position (xnow, ynow, znow);
xnew = min (1.0f, xnow - xdelta);
xnew = max (0.0f, xnew);
ynew = min (1.0f, ynow - ydelta);
ynew = max (0.0f, ynew);
znew = min (1.0f, znow + zdelta);
znew = max (0.0f, znew);
(*i)->set_position (xnew, ynew, znew, true);
}
}
}
}
/* old school automation handling */
void
Panner::set_name (string str)
{
automation_path = Glib::build_filename(_session.automation_dir(),
_session.snap_name() + "-pan-" + legalize_for_path (str) + ".automation");
}
int
Panner::load ()
{
char line[128];
uint32_t linecnt = 0;
float version;
iterator sp;
LocaleGuard lg (X_("POSIX"));
if (automation_path.length() == 0) {
return 0;
}
if (access (automation_path.c_str(), F_OK)) {
return 0;
}
ifstream in (automation_path.c_str());
if (!in) {
error << string_compose (_("cannot open pan automation file %1 (%2)"),
automation_path, strerror (errno))
<< endmsg;
return -1;
}
sp = begin();
while (in.getline (line, sizeof(line), '\n')) {
if (++linecnt == 1) {
if (memcmp (line, X_("version"), 7) == 0) {
if (sscanf (line, "version %f", &version) != 1) {
error << string_compose(_("badly formed version number in pan automation event file \"%1\""), automation_path) << endmsg;
return -1;
}
} else {
error << string_compose(_("no version information in pan automation event file \"%1\" (first line = %2)"),
automation_path, line) << endmsg;
return -1;
}
continue;
}
if (strlen (line) == 0 || line[0] == '#') {
continue;
}
if (strcmp (line, "begin") == 0) {
if (sp == end()) {
error << string_compose (_("too many panner states found in pan automation file %1"),
automation_path)
<< endmsg;
return -1;
}
if ((*sp)->load (in, automation_path, linecnt)) {
return -1;
}
++sp;
}
}
return 0;
}
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