git.sesse.net Git - nageru/blob - theme.h

   1 #ifndef _THEME_H
   2 #define _THEME_H 1
   3
   4 #include <lua.hpp>
   5 #include <movit/flat_input.h>
   6 #include <movit/ycbcr_input.h>
   7 #include <stdbool.h>
   8 #include <functional>
   9 #include <map>
  10 #include <mutex>
  11 #include <string>
  12 #include <vector>
  13
  14 #include "bmusb/bmusb.h"
  15 #include "ref_counted_frame.h"
  16 #include "tweaked_inputs.h"
  17
  18 class CEFCapture;
  19 class FFmpegCapture;
  20 class LiveInputWrapper;
  21 struct InputState;
  22
  23 namespace movit {
  24 class Effect;
  25 class EffectChain;
  26 class ResourcePool;
  27 }  // namespace movit
  28
  29 class Theme {
  30 public:
  31         Theme(const std::string &filename, const std::vector<std::string> &search_dirs, movit::ResourcePool *resource_pool, unsigned num_cards);
  32         ~Theme();
  33
  34         struct Chain {
  35                 movit::EffectChain *chain;
  36                 std::function<void()> setup_chain;
  37
  38                 // FRAME_HISTORY frames for each input, in order. Will contain duplicates
  39                 // for non-interlaced inputs.
  40                 std::vector<RefCountedFrame> input_frames;
  41         };
  42
  43         Chain get_chain(unsigned num, float t, unsigned width, unsigned height, InputState input_state);
  44
  45         int get_num_channels() const { return num_channels; }
  46         int map_signal(int signal_num);
  47         void set_signal_mapping(int signal_num, int card_num);
  48         std::string get_channel_name(unsigned channel);
  49         int get_channel_signal(unsigned channel);
  50         bool get_supports_set_wb(unsigned channel);
  51         void set_wb(unsigned channel, double r, double g, double b);
  52         std::string get_channel_color(unsigned channel);
  53
  54         std::vector<std::string> get_transition_names(float t);
  55
  56         void transition_clicked(int transition_num, float t);
  57         void channel_clicked(int preview_num);
  58
  59         movit::ResourcePool *get_resource_pool() const { return resource_pool; }
  60
  61         // Should be called as part of VideoInput.new() only.
  62         void register_video_input(FFmpegCapture *capture)
  63         {
  64                 video_inputs.push_back(capture);
  65         }
  66
  67         std::vector<FFmpegCapture *> get_video_inputs() const
  68         {
  69                 return video_inputs;
  70         }
  71
  72 #ifdef HAVE_CEF
  73         // Should be called as part of HTMLInput.new() only.
  74         void register_html_input(CEFCapture *capture)
  75         {
  76                 html_inputs.push_back(capture);
  77         }
  78
  79         std::vector<CEFCapture *> get_html_inputs() const
  80         {
  81                 return html_inputs;
  82         }
  83 #endif
  84
  85         void register_video_signal_connection(LiveInputWrapper *live_input, FFmpegCapture *capture)
  86         {
  87                 video_signal_connections.emplace_back(live_input, capture);
  88         }
  89
  90         std::vector<std::pair<LiveInputWrapper *, FFmpegCapture *>> get_video_signal_connections() const
  91         {
  92                 return video_signal_connections;
  93         }
  94
  95 #ifdef HAVE_CEF
  96         void register_html_signal_connection(LiveInputWrapper *live_input, CEFCapture *capture)
  97         {
  98                 html_signal_connections.emplace_back(live_input, capture);
  99         }
 100
 101         std::vector<std::pair<LiveInputWrapper *, CEFCapture *>> get_html_signal_connections() const
 102         {
 103                 return html_signal_connections;
 104         }
 105 #endif
 106
 107         struct MenuEntry {
 108                 std::string text;
 109                 int lua_ref;
 110         };
 111         std::vector<MenuEntry> get_theme_menu() { return theme_menu; }  // Can be empty for no menu.
 112         void theme_menu_entry_clicked(int lua_ref);
 113
 114         // Will be invoked every time the theme sets a new menu.
 115         // Is not invoked for a menu that exists at the time of the callback.
 116         void set_theme_menu_callback(std::function<void()> callback)
 117         {
 118                 theme_menu_callback = callback;
 119         }
 120
 121 private:
 122         void register_constants();
 123         void register_class(const char *class_name, const luaL_Reg *funcs);
 124         int set_theme_menu(lua_State *L);
 125
 126         std::mutex m;
 127         lua_State *L;  // Protected by <m>.
 128         const InputState *input_state = nullptr;  // Protected by <m>. Only set temporarily, during chain setup.
 129         movit::ResourcePool *resource_pool;
 130         int num_channels;
 131         unsigned num_cards;
 132
 133         std::mutex map_m;
 134         std::map<int, int> signal_to_card_mapping;  // Protected by <map_m>.
 135
 136         std::vector<FFmpegCapture *> video_inputs;
 137         std::vector<std::pair<LiveInputWrapper *, FFmpegCapture *>> video_signal_connections;
 138 #ifdef HAVE_CEF
 139         std::vector<CEFCapture *> html_inputs;
 140         std::vector<std::pair<LiveInputWrapper *, CEFCapture *>> html_signal_connections;
 141 #endif
 142
 143         std::vector<MenuEntry> theme_menu;
 144         std::function<void()> theme_menu_callback;
 145
 146         friend class LiveInputWrapper;
 147         friend int ThemeMenu_set(lua_State *L);
 148 };
 149
 150 // LiveInputWrapper is a facade on top of an YCbCrInput, exposed to
 151 // the Lua code. It contains a function (connect_signal()) intended
 152 // to be called during chain setup, that picks out the current frame
 153 // (in the form of a set of textures) from the input state given by
 154 // the mixer, and communicates that state over to the actual YCbCrInput.
 155 class LiveInputWrapper {
 156 public:
 157         // Note: <override_bounce> is irrelevant for PixelFormat_8BitBGRA.
 158         LiveInputWrapper(Theme *theme, movit::EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace);
 159
 160         void connect_signal(int signal_num);  // Must be called with the theme's <m> lock held, since it accesses theme->input_state.
 161         void connect_signal_raw(int signal_num, const InputState &input_state);
 162         movit::Effect *get_effect() const
 163         {
 164                 if (deinterlace) {
 165                         return deinterlace_effect;
 166                 } else if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
 167                         return rgba_inputs[0];
 168                 } else {
 169                         return ycbcr_inputs[0];
 170                 }
 171         }
 172
 173 private:
 174         Theme *theme;  // Not owned by us.
 175         bmusb::PixelFormat pixel_format;
 176         movit::YCbCrFormat input_ycbcr_format;
 177         std::vector<movit::YCbCrInput *> ycbcr_inputs;  // Multiple ones if deinterlacing. Owned by the chain.
 178         std::vector<movit::FlatInput *> rgba_inputs;  // Multiple ones if deinterlacing. Owned by the chain.
 179         movit::Effect *deinterlace_effect = nullptr;  // Owned by the chain.
 180         bool deinterlace;
 181 };
 182
 183 #endif  // !defined(_THEME_H)