From cc72907777af0a879dbbc820687658605066f939 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Micha=C3=ABl=20Celerier?=
 <jeanmichael.celerier@gmail.com>
Date: Tue, 5 Dec 2023 19:58:51 -0500
Subject: [PATCH] [gfx] wip on live changing of video files

---
 .../score-plugin-gfx/Gfx/GfxExecNode.cpp      |  1 +
 .../score-plugin-gfx/Gfx/GfxExecNode.hpp      |  1 +
 .../score-plugin-gfx/Gfx/Video/Executor.cpp   | 74 +++++++++++++------
 3 files changed, 54 insertions(+), 22 deletions(-)

diff --git a/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.cpp b/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.cpp
index 585f2e2f0b..e4473730ac 100644
--- a/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.cpp
+++ b/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.cpp
@@ -17,6 +17,7 @@ gfx_exec_node::~gfx_exec_node()
 void gfx_exec_node::run(
     const ossia::token_request& tk, ossia::exec_state_facade) noexcept
 {
+  m_last_flicks = tk.date;
   {
     // Copy all the UI controls
     const int n = std::ssize(controls);
diff --git a/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.hpp b/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.hpp
index 40f560b109..6fdc8446d3 100644
--- a/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.hpp
+++ b/src/plugins/score-plugin-gfx/Gfx/GfxExecNode.hpp
@@ -98,6 +98,7 @@ class SCORE_PLUGIN_GFX_EXPORT gfx_exec_node : public ossia::graph_node
 
   int32_t id{-1};
   std::atomic_int32_t script_index{0};
+  ossia::time_value m_last_flicks{};
   void run(const ossia::token_request& tk, ossia::exec_state_facade) noexcept override;
 };
 
diff --git a/src/plugins/score-plugin-gfx/Gfx/Video/Executor.cpp b/src/plugins/score-plugin-gfx/Gfx/Video/Executor.cpp
index ec0a6b21fe..20087feebd 100644
--- a/src/plugins/score-plugin-gfx/Gfx/Video/Executor.cpp
+++ b/src/plugins/score-plugin-gfx/Gfx/Video/Executor.cpp
@@ -38,6 +38,21 @@ class video_node final : public gfx_exec_node
       exec_context->ui->unregister_node(id);
   }
 
+  void reload(const std::shared_ptr<video_decoder>& dec, std::optional<double> tempo)
+  {
+    impl = nullptr;
+
+    if(id >= 0)
+      exec_context->ui->unregister_node(id);
+
+    m_decoder = dec;
+    m_decoder->seek(m_last_flicks.impl);
+
+    auto n = std::make_unique<score::gfx::VideoNode>(m_decoder, tempo);
+    impl = n.get();
+    id = exec_context->ui->register_node(std::move(n));
+  }
+
   std::string label() const noexcept override
   {
     if(this->m_decoder)
@@ -109,37 +124,52 @@ ProcessExecutorComponent::ProcessExecutorComponent(
     Gfx::Video::Model& element, const Execution::Context& ctx, QObject* parent)
     : ProcessComponent_T{element, ctx, "VideoExecutorComponent", parent}
 {
-  if(auto dec = element.makeDecoder())
-  {
-    std::optional<double> tempo;
-    if(!element.ignoreTempo())
-      tempo = element.nativeTempo();
-    auto n = ossia::make_node<video_node>(
-        *ctx.execState, dec, tempo, ctx.doc.plugin<DocumentPlugin>().exec);
+  auto dec = element.makeDecoder();
+  if(!dec)
+    dec = std::make_shared<Video::video_decoder>(::Video::DecoderConfiguration{});
+
+  std::optional<double> tempo;
+  if(!element.ignoreTempo())
+    tempo = element.nativeTempo();
+  auto n = ossia::make_node<video_node>(
+      *ctx.execState, std::move(dec), tempo, ctx.doc.plugin<DocumentPlugin>().exec);
 
-    for(auto* outlet : element.outlets())
+  for(auto* outlet : element.outlets())
+  {
+    if(auto out = qobject_cast<Gfx::TextureOutlet*>(outlet))
     {
-      if(auto out = qobject_cast<Gfx::TextureOutlet*>(outlet))
-      {
-        out->nodeId = n->id;
-      }
+      out->nodeId = n->id;
     }
+  }
 
-    n->root_outputs().push_back(new ossia::texture_outlet);
+  n->root_outputs().push_back(new ossia::texture_outlet);
 
-    this->node = n;
-    m_ossia_process = std::make_shared<video_process>(n);
+  this->node = n;
+  m_ossia_process = std::make_shared<video_process>(n);
 
-    ::bind(
-        element, Gfx::Video::Model::p_scaleMode{}, this,
-        [this](score::gfx::ScaleMode m) {
-      if(auto vn = static_cast<video_node*>(this->node.get()); vn && vn->impl)
+  ::bind(
+      element, Gfx::Video::Model::p_scaleMode{}, this, [this](score::gfx::ScaleMode m) {
+        if(auto vn = static_cast<video_node*>(this->node.get()); vn && vn->impl)
+        {
+          vn->impl->setScaleMode(m);
+        }
+      });
+
+  con(element, &Gfx::Video::Model::pathChanged, this, [this](const QString& new_path) {
+    std::optional<double> tempo;
+    if(!this->process().ignoreTempo())
+      tempo = this->process().nativeTempo();
+
+    in_exec([node = std::weak_ptr{node}, dec = this->process().makeDecoder(),
+             tempo]() mutable {
+      if(auto vn = static_cast<video_node*>(node.lock().get()); vn && vn->impl)
       {
-        vn->impl->setScaleMode(m);
+        vn->reload(std::move(dec), tempo);
       }
-        });
-  }
+    });
+  });
 }
+
 void ProcessExecutorComponent::cleanup()
 {
   for(auto* outlet : this->process().outlets())