- const XMLProperty* prop;
- XMLNodeConstIterator iter;
-
- if ((prop = node.property (X_("muted")))) {
- set_muted (prop->value() == "yes");
- }
-
- 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_state() == Write || _automation.automation_state() == Touch) {
- _automation.rt_add (now, x);
- }
-}
-
-void
-BaseStereoPanner::transport_stopped (nframes_t frame)
-{
- _automation.reposition_for_rt_add (frame);
-
- if (_automation.automation_state() != Off) {
- set_position (_automation.eval (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);
-
- if (state != Off) {
- 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')) {
- 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 (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes)
-{
- assert(obufs.count().get(DataType::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
-
- /* 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;
-
- 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) {
-
- mix_buffers_with_gain(dst,src,nframes,pan);
-
- /* mark that we wrote into the buffer */
-
- // obufs[0] = 0;
-
- }
-
- } else {
-
- 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
-
- /* 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;
-
- 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) {
-
- mix_buffers_with_gain(dst,src,nframes,pan);
-
- /* XXX it would be nice to mark the buffer as written to */
- }
-
- } else {
-
- 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 (AudioBuffer& srcbuf, BufferSet& obufs,
- nframes_t start, nframes_t end, nframes_t nframes,
- pan_t** buffers)
-{
- assert(obufs.count().get(DataType::AUDIO) == 2);
-
- Sample* dst;
- pan_t* pbuf;
- Sample* const src = srcbuf.data();
-
- /* fetch positional data */
-
- if (!_automation.rt_safe_get_vector (start, end, buffers[0], nframes)) {
- /* fallback */
- if (!_muted) {
- distribute (srcbuf, 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.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)
-{
- 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() != 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 (AudioBuffer& srcbuf, BufferSet& obufs, gain_t gain_coeff, nframes_t nframes)
-{
- Sample* dst;
- pan_t pan;
- vector<Panner::Output>::iterator o;
- uint32_t n;
-
- if (_muted) {
- return;
- }
-
- Sample* const src = srcbuf.data();
-
-
- for (n = 0, o = parent.outputs.begin(); o != parent.outputs.end(); ++o, ++n) {
-
- dst = obufs.get_audio(n).data();
-
-#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;
- 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) {
- mix_buffers_with_gain(dst,src,nframes,pan);
- }
- } else {
- mix_buffers_no_gain(dst,src,nframes);
- }
-#endif
-#ifdef CAN_INTERP
- }
-#endif
- }
-
- return;
-}
-
-void
-Multi2dPanner::distribute_automated (AudioBuffer& src, BufferSet& 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;