-}
-
-int
-BaseStereoPanner::load (istream& in, string path, uint32_t& linecnt)
-{
- char line[128];
- LocaleGuard lg (X_("POSIX"));
-
- _control->list()->clear ();
-
- while (in.getline (line, sizeof (line), '\n')) {
- 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;
- }
-
- _control->list()->fast_simple_add (when, value);
- }
-
- /* now that we are done loading */
-
- ((AutomationList*)_control->list().get())->StateChanged ();
-
- return 0;
-}
-
-void
-BaseStereoPanner::do_distribute (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes)
-{
- assert(obufs.count().n_audio() == 2);
-
- pan_t delta;
- Sample* dst;
- pan_t pan;
-
- if (_muted) {
- return;
- }
-
- Sample* const src = srcbuf.data();
-
- /* LEFT */
-
- dst = obufs.get_audio(0).data();
-
- 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 */
-
- nframes_t const 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;
- }
-
- /* then pan the rest of the buffer; no need for interpolation for this bit */
-
- pan = left * gain_coeff;
-
- 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) {
-
- /* pan is 1 but also not 0, so we must do it "properly" */
-
- mix_buffers_with_gain(dst,src,nframes,pan);
-
- /* mark that we wrote into the buffer */
-
- // obufs[0] = 0;
-
- }
-
- } else {
-
- /* pan is 1 so we can just copy the input samples straight in */
-
- mix_buffers_no_gain(dst,src,nframes);
-
- /* mark that we wrote into the buffer */
-
- // obufs[0] = 0;
- }
- }
-
- /* RIGHT */
-
- dst = obufs.get_audio(1).data();
-
- 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 */
-
- nframes_t const 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;
- }
-
- /* then pan the rest of the buffer, no need for interpolation for this bit */
-
- pan = right * gain_coeff;
-
- 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) {
-
- /* pan is not 1 but also not 0, so we must do it "properly" */
-
- mix_buffers_with_gain(dst,src,nframes,pan);
-
- /* XXX it would be nice to mark the buffer as written to */
- }
-
- } else {
-
- /* pan is 1 so we can just copy the input samples straight in */
-
- mix_buffers_no_gain(dst,src,nframes);
-
- /* XXX it would be nice to mark the buffer as written to */
- }
- }
-}
-
-/*---------------------------------------------------------------------- */
-
-EqualPowerStereoPanner::EqualPowerStereoPanner (Panner& p, Evoral::Parameter param)
- : BaseStereoPanner (p, param)
-{
- 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 do_distribute_automated().
-
- but the place where its used in do_distribute_automated() is a tight inner loop,
- and making "nframes" virtual function calls to compute values is an absurd
- overhead.
- */
-
- /* x == 0 => hard left = 180.0 degrees
- x == 1 => hard right = 0.0 degrees
- */
-
- double _x = BaseStereoPanner::azimuth_to_lr_fract (_angles.azi);
-
- float const panR = _x;
- float const panL = 1 - panR;
-
- float const pan_law_attenuation = -3.0f;
- float const 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_angles = _angles;
- //_control->set_value(x);
-}
-
-void
-EqualPowerStereoPanner::do_distribute_automated (AudioBuffer& srcbuf, BufferSet& obufs,
- nframes_t start, nframes_t end, nframes_t nframes,
- pan_t** buffers)
-{
- assert (obufs.count().n_audio() == 2);
-
- Sample* dst;
- pan_t* pbuf;
- Sample* const src = srcbuf.data();
-
- /* fetch positional data */
-
- if (!_control->list()->curve().rt_safe_get_vector (start, end, buffers[0], nframes)) {
- /* fallback */
- if (!_muted) {
- do_distribute (srcbuf, obufs, 1.0, nframes);
- }
- return;
- }
-
- /* store effective pan position. do this even if we are muted */
-
- if (nframes > 0) {
- _effective_angles.azi = BaseStereoPanner::lr_fract_to_azimuth (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 const panR = buffers[0][n];
- float const panL = 1 - panR;
-
- buffers[0][n] = panL * (scale * panL + 1.0f - scale);
- buffers[1][n] = panR * (scale * panR + 1.0f - scale);
- }
-
- /* LEFT */
-
- dst = obufs.get_audio(0).data();
- 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.get_audio(1).data();
- 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, Evoral::Parameter param, Speakers& /* ignored */)
-{
- return new EqualPowerStereoPanner (parent, param);
-}
-
-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", _angles.azi);
- root->add_property (X_("azimuth"), buf);
- root->add_property (X_("type"), EqualPowerStereoPanner::name);
-
- // XXX: dont save automation here... its part of the automatable panner now.
-
- StreamPanner::add_state (*root);
-
- root->add_child_nocopy (_control->get_state ());
-
- return *root;
-}
-
-int
-EqualPowerStereoPanner::set_state (const XMLNode& node, int version)
-{
- const XMLProperty* prop;
- LocaleGuard lg (X_("POSIX"));
-
- if ((prop = node.property (X_("azimuth")))) {
- AngularVector a (atof (prop->value().c_str()), 0.0);
- set_position (a, true);
- } else if ((prop = node.property (X_("x")))) {
- /* old school cartesian positioning */
- AngularVector a;
- a.azi = BaseStereoPanner::lr_fract_to_azimuth (atof (prop->value().c_str()));
- set_position (a, true);
- }
-
- StreamPanner::set_state (node, version);
-
- for (XMLNodeConstIterator iter = node.children().begin(); iter != node.children().end(); ++iter) {
-
- if ((*iter)->name() == Controllable::xml_node_name) {
- if ((prop = (*iter)->property("name")) != 0 && prop->value() == "panner") {
- _control->set_state (**iter, version);
- }
-
- } else if ((*iter)->name() == X_("Automation")) {
-
- _control->alist()->set_state (*((*iter)->children().front()), version);
-
- if (_control->alist()->automation_state() != Off) {
- double degrees = BaseStereoPanner::lr_fract_to_azimuth (_control->list()->eval (parent.session().transport_frame()));
- set_position (AngularVector (degrees, 0.0));
- }
- }
- }
-
- return 0;
-}
-
-Panner::Panner (string name, Session& s)
- : SessionObject (s, name)
- , Automatable (s)
-{
- //set_name_old_auto (name);
- set_name (name);
-
- _linked = false;
- _link_direction = SameDirection;
- _bypassed = false;
- _mono = false;