#include "ardour/session.h"
#include "ardour/panner.h"
-#include "ardour/panner_1in2out.h"
#include "ardour/utils.h"
#include "ardour/audio_buffer.h"
+#include "ardour/debug.h"
#include "ardour/runtime_functions.h"
#include "ardour/buffer_set.h"
#include "ardour/audio_buffer.h"
-#include "ardour/vbap.h"
+#include "ardour/pannable.h"
#include "i18n.h"
+#include "panner_1in2out.h"
#include "pbd/mathfix.h"
static PanPluginDescriptor _descriptor = {
"Mono to Stereo Panner",
- 1, 1, 2, 2,
+ "http://ardour.org/plugin/panner_1in2out",
+ "http://ardour.org/plugin/panner_1in2out#ui",
+ 1, 2,
+ 10000,
Panner1in2out::factory
};
-extern "C" { PanPluginDescriptor* panner_descriptor () { return &_descriptor; }
+extern "C" ARDOURPANNER_API PanPluginDescriptor* panner_descriptor () { return &_descriptor; }
-Panner1in2out::Panner1in2out (PannerShell& p)
+Panner1in2out::Panner1in2out (boost::shared_ptr<Pannable> p)
: Panner (p)
- , _position (new PanControllable (parent.session(), _("position"), this, Evoral::Parameter(PanAzimuthAutomation, 0, 0)))
- , left (0.5)
- , right (0.5)
- , left_interp (left)
- , right_interp (right)
{
- desired_left = left;
- desired_right = right;
+ if (!_pannable->has_state()) {
+ _pannable->pan_azimuth_control->set_value (0.5);
+ }
+
+ update ();
+
+ left = desired_left;
+ right = desired_right;
+ left_interp = left;
+ right_interp = right;
+
+ _pannable->pan_azimuth_control->Changed.connect_same_thread (*this, boost::bind (&Panner1in2out::update, this));
}
Panner1in2out::~Panner1in2out ()
{
}
+void
+Panner1in2out::update ()
+{
+ float panR, panL;
+ float const pan_law_attenuation = -3.0f;
+ float const scale = 2.0f - 4.0f * powf (10.0f,pan_law_attenuation/20.0f);
+
+ panR = _pannable->pan_azimuth_control->get_value();
+ panL = 1 - panR;
+
+ desired_left = panL * (scale * panL + 1.0f - scale);
+ desired_right = panR * (scale * panR + 1.0f - scale);
+}
+
void
Panner1in2out::set_position (double p)
{
- _desired_right = p;
- _desired_left = 1 - p;
+ if (clamp_position (p)) {
+ _pannable->pan_azimuth_control->set_value (p);
+ }
+}
+
+bool
+Panner1in2out::clamp_position (double& p)
+{
+ /* any position between 0.0 and 1.0 is legal */
+ DEBUG_TRACE (DEBUG::Panning, string_compose ("want to move panner to %1 - always allowed in 0.0-1.0 range\n", p));
+ p = max (min (p, 1.0), 0.0);
+ return true;
+}
+
+pair<double, double>
+Panner1in2out::position_range () const
+{
+ return make_pair (0, 1);
+}
+
+double
+Panner1in2out::position () const
+{
+ return _pannable->pan_azimuth_control->get_value ();
}
void
-Panner1in2out::do_distribute_one (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, pframes_t nframes, uint32_t /* not used */)
+Panner1in2out::distribute_one (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, pframes_t nframes, uint32_t /* not used */)
{
assert (obufs.count().n_audio() == 2);
Sample* dst;
pan_t pan;
- if (_muted) {
- return;
- }
-
Sample* const src = srcbuf.data();
/* LEFT OUTPUT */
dst = obufs.get_audio(0).data();
- if (fabsf ((delta = (left[which] - desired_left[which]))) > 0.002) { // about 1 degree of arc
+ if (fabsf ((delta = (left - desired_left))) > 0.002) { // about 1 degree of arc
/* we've moving the pan by an appreciable amount, so we must
interpolate over 64 frames or nframes, whichever is smaller */
delta = -(delta / (float) (limit));
for (n = 0; n < limit; n++) {
- left_interp[which] = left_interp[which] + delta;
- left = left_interp[which] + 0.9 * (left[which] - left_interp[which]);
- dst[n] += src[n] * left[which] * gain_coeff;
+ left_interp = left_interp + delta;
+ left = left_interp + 0.9 * (left - left_interp);
+ dst[n] += src[n] * left * gain_coeff;
}
/* then pan the rest of the buffer; no need for interpolation for this bit */
- pan = left[which] * gain_coeff;
+ pan = left * gain_coeff;
mix_buffers_with_gain (dst+n,src+n,nframes-n,pan);
} else {
- left[which] = desired_left[which];
- left_interp[which] = left[which];
+ left = desired_left;
+ left_interp = left;
- if ((pan = (left[which] * gain_coeff)) != 1.0f) {
+ if ((pan = (left * gain_coeff)) != 1.0f) {
if (pan != 0.0f) {
dst = obufs.get_audio(1).data();
- if (fabsf ((delta = (right[which] - desired_right[which]))) > 0.002) { // about 1 degree of arc
+ if (fabsf ((delta = (right - desired_right))) > 0.002) { // about 1 degree of arc
/* we're moving the pan by an appreciable amount, so we must
interpolate over 64 frames or nframes, whichever is smaller */
delta = -(delta / (float) (limit));
for (n = 0; n < limit; n++) {
- right_interp[which] = right_interp[which] + delta;
- right[which] = right_interp[which] + 0.9 * (right[which] - right_interp[which]);
- dst[n] += src[n] * right[which] * gain_coeff;
+ right_interp = right_interp + delta;
+ right = right_interp + 0.9 * (right - right_interp);
+ dst[n] += src[n] * right * gain_coeff;
}
/* then pan the rest of the buffer, no need for interpolation for this bit */
- pan = right[which] * gain_coeff;
+ pan = right * gain_coeff;
mix_buffers_with_gain(dst+n,src+n,nframes-n,pan);
} else {
- right[which] = desired_right[which];
- right_interp[which] = right[which];
+ right = desired_right;
+ right_interp = right;
- if ((pan = (right[which] * gain_coeff)) != 1.0f) {
+ if ((pan = (right * gain_coeff)) != 1.0f) {
if (pan != 0.0f) {
}
+void
+Panner1in2out::distribute_one_automated (AudioBuffer& srcbuf, BufferSet& obufs,
+ framepos_t start, framepos_t end, pframes_t nframes,
+ pan_t** buffers, uint32_t which)
+{
+ assert (obufs.count().n_audio() == 2);
+
+ Sample* dst;
+ pan_t* pbuf;
+ Sample* const src = srcbuf.data();
+ pan_t* const position = buffers[0];
+
+ /* fetch positional data */
+
+ if (!_pannable->pan_azimuth_control->list()->curve().rt_safe_get_vector (start, end, position, nframes)) {
+ /* fallback */
+ distribute_one (srcbuf, obufs, 1.0, nframes, which);
+ 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 (pframes_t n = 0; n < nframes; ++n) {
+
+ float panR = position[n];
+ const float panL = 1 - panR;
+
+ /* note that are overwriting buffers, but its OK
+ because we're finished with their old contents
+ (position automation data) and are
+ replacing it with panning/gain coefficients
+ that we need to actually process the data.
+ */
+
+ buffers[0][n] = panL * (scale * panL + 1.0f - scale);
+ buffers[1][n] = panR * (scale * panR + 1.0f - scale);
+ }
+
+ /* LEFT OUTPUT */
+
+ dst = obufs.get_audio(0).data();
+ pbuf = buffers[0];
+
+ for (pframes_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 OUTPUT */
+
+ dst = obufs.get_audio(1).data();
+ pbuf = buffers[1];
+
+ for (pframes_t n = 0; n < nframes; ++n) {
+ dst[n] += src[n] * pbuf[n];
+ }
+
+ /* XXX it would be nice to mark the buffer as written to */
+}
+
+
+Panner*
+Panner1in2out::factory (boost::shared_ptr<Pannable> p, boost::shared_ptr<Speakers> /* ignored */)
+{
+ return new Panner1in2out (p);
+}
+
+XMLNode&
+Panner1in2out::get_state ()
+{
+ XMLNode& root (Panner::get_state ());
+ root.add_property (X_("uri"), _descriptor.panner_uri);
+ /* this is needed to allow new sessions to load with old Ardour: */
+ root.add_property (X_("type"), _descriptor.name);
+ return root;
+}
+
+
+std::set<Evoral::Parameter>
+Panner1in2out::what_can_be_automated() const
+{
+ set<Evoral::Parameter> s;
+ s.insert (Evoral::Parameter (PanAzimuthAutomation));
+ return s;
+}
+
string
-Panner1in2out::describe_parameter (Evoral::Parameter param)
+Panner1in2out::describe_parameter (Evoral::Parameter p)
{
- switch (param.type()) {
- case PanWidthAutomation:
- return "Pan:width";
+ switch (p.type()) {
case PanAzimuthAutomation:
- return "Pan:position";
- case PanElevationAutomation:
- error << X_("stereo panner should not have elevation control") << endmsg;
- return "Pan:elevation";
- }
-
- return Automatable::describe_parameter (param);
+ return _("L/R");
+ default:
+ return _pannable->describe_parameter (p);
+ }
}
+string
+Panner1in2out::value_as_string (boost::shared_ptr<AutomationControl> ac) const
+{
+ /* DO NOT USE LocaleGuard HERE */
+ double val = ac->get_value();
+
+ switch (ac->parameter().type()) {
+ case PanAzimuthAutomation:
+ /* We show the position of the center of the image relative to the left & right.
+ This is expressed as a pair of percentage values that ranges from (100,0)
+ (hard left) through (50,50) (hard center) to (0,100) (hard right).
+
+ This is pretty wierd, but its the way audio engineers expect it. Just remember that
+ the center of the USA isn't Kansas, its (50LA, 50NY) and it will all make sense.
+
+ This is designed to be as narrow as possible. Dedicated
+ panner GUIs can do their own version of this if they need
+ something less compact.
+ */
+
+ return string_compose (_("L%1R%2"), (int) rint (100.0 * (1.0 - val)),
+ (int) rint (100.0 * val));
+
+ default:
+ return _("unused");
+ }
+}
+
+void
+Panner1in2out::reset ()
+{
+ set_position (0.5);
+ update ();
+}
projects / ardour.git / blobdiff