git.sesse.net Git - nageru/blob - nageru/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 <unordered_map>
  13 #include <vector>
  14
  15 #include "bmusb/bmusb.h"
  16 #include "defs.h"
  17 #include "ref_counted_frame.h"
  18 #include "tweaked_inputs.h"
  19
  20 class Scene;
  21 class CEFCapture;
  22 class FFmpegCapture;
  23 class LiveInputWrapper;
  24 struct InputState;
  25
  26 namespace movit {
  27 class Effect;
  28 class EffectChain;
  29 class ResourcePool;
  30 }  // namespace movit
  31
  32 enum EffectType {
  33         // LIVE_INPUT_* also covers CEF and video inputs.
  34         LIVE_INPUT_YCBCR,
  35         LIVE_INPUT_YCBCR_WITH_DEINTERLACE,
  36         LIVE_INPUT_YCBCR_PLANAR,
  37         LIVE_INPUT_BGRA,
  38         IMAGE_INPUT,
  39
  40         IDENTITY_EFFECT,
  41         WHITE_BALANCE_EFFECT,
  42         RESAMPLE_EFFECT,
  43         PADDING_EFFECT,
  44         INTEGRAL_PADDING_EFFECT,
  45         OVERLAY_EFFECT,
  46         RESIZE_EFFECT,
  47         MULTIPLY_EFFECT,
  48         MIX_EFFECT,
  49         LIFT_GAMMA_GAIN_EFFECT,
  50
  51         NO_EFFECT_TYPE
  52 };
  53
  54 // An EffectBlueprint refers to an Effect before it's being added to the graph.
  55 // It contains enough information to instantiate the effect, including any
  56 // parameters that were set before it was added to the graph. Once it is
  57 // instantiated, it forwards its calls on to the real Effect instead.
  58 struct EffectBlueprint {
  59         EffectBlueprint(EffectType effect_type) : effect_type(effect_type) {}
  60
  61         EffectType effect_type;
  62         std::map<std::string, int> int_parameters;
  63         std::map<std::string, float> float_parameters;
  64         std::map<std::string, std::array<float, 3>> vec3_parameters;
  65         std::map<std::string, std::array<float, 4>> vec4_parameters;
  66
  67         movit::Effect *effect = nullptr;  // Gets filled out when it's instantiated.
  68 };
  69
  70 // Contains basically the same data as InputState, but does not hold on to
  71 // a reference to the frames. This is important so that we can release them
  72 // without having to wait for Lua's GC.
  73 struct InputStateInfo {
  74         explicit InputStateInfo(const InputState& input_state);
  75
  76         unsigned last_width[MAX_VIDEO_CARDS], last_height[MAX_VIDEO_CARDS];
  77         bool last_interlaced[MAX_VIDEO_CARDS], last_has_signal[MAX_VIDEO_CARDS], last_is_connected[MAX_VIDEO_CARDS];
  78         unsigned last_frame_rate_nom[MAX_VIDEO_CARDS], last_frame_rate_den[MAX_VIDEO_CARDS];
  79         bool has_last_subtitle[MAX_VIDEO_CARDS];
  80         std::string last_subtitle[MAX_VIDEO_CARDS];
  81 };
  82
  83 class Theme {
  84 public:
  85         Theme(const std::string &filename, const std::vector<std::string> &search_dirs, movit::ResourcePool *resource_pool, unsigned num_cards);
  86         ~Theme();
  87
  88         struct Chain {
  89                 movit::EffectChain *chain;
  90                 std::function<void()> setup_chain;
  91
  92                 // FRAME_HISTORY frames for each input, in order. Will contain duplicates
  93                 // for non-interlaced inputs.
  94                 std::vector<RefCountedFrame> input_frames;
  95         };
  96
  97         Chain get_chain(unsigned num, float t, unsigned width, unsigned height, const InputState &input_state);
  98
  99         int get_num_channels() const { return num_channels; }
 100         int map_signal(int signal_num);
 101         void set_signal_mapping(int signal_num, int card_num);
 102         std::string get_channel_name(unsigned channel);
 103         int get_channel_signal(unsigned channel);
 104         bool get_supports_set_wb(unsigned channel);
 105         void set_wb(unsigned channel, double r, double g, double b);
 106         std::string get_channel_color(unsigned channel);
 107
 108         std::vector<std::string> get_transition_names(float t);
 109
 110         void transition_clicked(int transition_num, float t);
 111         void channel_clicked(int preview_num);
 112
 113         movit::ResourcePool *get_resource_pool() const { return resource_pool; }
 114
 115         // Should be called as part of VideoInput.new() only.
 116         void register_video_input(FFmpegCapture *capture)
 117         {
 118                 video_inputs.push_back(capture);
 119         }
 120
 121         std::vector<FFmpegCapture *> get_video_inputs() const
 122         {
 123                 return video_inputs;
 124         }
 125
 126 #ifdef HAVE_CEF
 127         // Should be called as part of HTMLInput.new() only.
 128         void register_html_input(CEFCapture *capture)
 129         {
 130                 html_inputs.push_back(capture);
 131         }
 132
 133         std::vector<CEFCapture *> get_html_inputs() const
 134         {
 135                 return html_inputs;
 136         }
 137 #endif
 138
 139         void register_video_signal_connection(movit::EffectChain *chain, LiveInputWrapper *live_input, FFmpegCapture *capture)
 140         {
 141                 video_signal_connections[chain].emplace_back(VideoSignalConnection { live_input, capture });
 142         }
 143
 144 #ifdef HAVE_CEF
 145         void register_html_signal_connection(movit::EffectChain *chain, LiveInputWrapper *live_input, CEFCapture *capture)
 146         {
 147                 html_signal_connections[chain].emplace_back(CEFSignalConnection { live_input, capture });
 148         }
 149 #endif
 150
 151         struct MenuEntry {
 152                 MenuEntry(const std::string &text, lua_State *L, int lua_ref, unsigned flags)
 153                         : text(text), is_submenu(false), entry{L, lua_ref, flags} {}
 154                 MenuEntry(const std::string &text, std::vector<std::unique_ptr<MenuEntry>> submenu)
 155                         : text(text), is_submenu(true), submenu(std::move(submenu)) {}
 156                 ~MenuEntry();
 157
 158                 static constexpr unsigned CHECKABLE = 1;
 159                 static constexpr unsigned CHECKED = 2;
 160
 161                 std::string text;
 162                 bool is_submenu;
 163
 164                 union {
 165                         // is_submenu = false.
 166                         struct {
 167                                 lua_State *L;
 168                                 int lua_ref;
 169                                 unsigned flags;
 170                         } entry;
 171
 172                         // is_submenu = true.
 173                         std::vector<std::unique_ptr<MenuEntry>> submenu;
 174                 };
 175         };
 176         MenuEntry *get_theme_menu() { return theme_menu.get(); }  // Can be empty for no menu.
 177         void theme_menu_entry_clicked(int lua_ref);
 178
 179         // Will be invoked every time the theme sets a new menu.
 180         // Is not invoked for a menu that exists at the time of the callback.
 181         void set_theme_menu_callback(std::function<void()> callback)
 182         {
 183                 theme_menu_callback = callback;
 184         }
 185
 186         std::string format_status_line(const std::string &disk_space_left_text, double file_length_seconds);
 187
 188 private:
 189         void register_globals();
 190         void register_class(const char *class_name, const luaL_Reg *funcs, EffectType effect_type = NO_EFFECT_TYPE);
 191         int set_theme_menu(lua_State *L);
 192         Chain get_chain_from_effect_chain(movit::EffectChain *effect_chain, unsigned num, const InputState &input_state);
 193
 194         std::string theme_path;
 195
 196         std::mutex m;
 197         lua_State *L;  // Protected by <m>.
 198         const InputState *input_state = nullptr;  // Protected by <m>. Only set temporarily, during chain setup.
 199         movit::ResourcePool *resource_pool;
 200         int num_channels = -1;
 201         unsigned num_cards;
 202         bool startup_finished = false;
 203
 204         std::mutex map_m;
 205         std::map<int, int> signal_to_card_mapping;  // Protected by <map_m>.
 206
 207         std::vector<FFmpegCapture *> video_inputs;
 208         struct VideoSignalConnection {
 209                 LiveInputWrapper *wrapper;
 210                 FFmpegCapture *source;
 211         };
 212         std::unordered_map<movit::EffectChain *, std::vector<VideoSignalConnection>>
 213                  video_signal_connections;
 214 #ifdef HAVE_CEF
 215         std::vector<CEFCapture *> html_inputs;
 216         struct CEFSignalConnection {
 217                 LiveInputWrapper *wrapper;
 218                 CEFCapture *source;
 219         };
 220         std::unordered_map<movit::EffectChain *, std::vector<CEFSignalConnection>>
 221                 html_signal_connections;
 222 #endif
 223
 224         std::unique_ptr<MenuEntry> theme_menu;
 225         std::function<void()> theme_menu_callback;
 226
 227         std::map<unsigned, std::string> channel_names;  // Set using Nageru.set_channel_name(). Protected by <m>.
 228         std::map<unsigned, int> channel_signals;  // Set using Nageru.set_channel_signal(). Protected by <m>.
 229         std::map<unsigned, bool> channel_supports_wb;  // Set using Nageru.set_supports_wb(). Protected by <m>.
 230
 231         friend class LiveInputWrapper;
 232         friend class Scene;
 233         friend int ThemeMenu_set(lua_State *L);
 234         friend int Nageru_set_channel_name(lua_State *L);
 235         friend int Nageru_set_num_channels(lua_State *L);
 236         friend int Nageru_set_channel_signal(lua_State *L);
 237         friend int Nageru_set_supports_wb(lua_State *L);
 238 };
 239
 240 // LiveInputWrapper is a facade on top of an YCbCrInput, exposed to
 241 // the Lua code. It contains a function (connect_signal()) intended
 242 // to be called during chain setup, that picks out the current frame
 243 // (in the form of a set of textures) from the input state given by
 244 // the mixer, and communicates that state over to the actual YCbCrInput.
 245 class LiveInputWrapper {
 246 public:
 247         // Note: <override_bounce> is irrelevant for PixelFormat_8BitBGRA.
 248         LiveInputWrapper(Theme *theme, movit::EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace, bool user_connectable);
 249
 250         bool connect_signal(int signal_num);  // Must be called with the theme's <m> lock held, since it accesses theme->input_state. Returns false on error.
 251         void connect_signal_raw(int signal_num, const InputState &input_state);
 252         movit::Effect *get_effect() const
 253         {
 254                 if (deinterlace) {
 255                         return deinterlace_effect;
 256                 } else if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
 257                         return rgba_inputs[0];
 258                 } else {
 259                         return ycbcr_inputs[0];
 260                 }
 261         }
 262
 263 private:
 264         Theme *theme;  // Not owned by us.
 265         bmusb::PixelFormat pixel_format;
 266         movit::YCbCrFormat input_ycbcr_format;
 267         std::vector<movit::YCbCrInput *> ycbcr_inputs;  // Multiple ones if deinterlacing. Owned by the chain.
 268         std::vector<movit::FlatInput *> rgba_inputs;  // Multiple ones if deinterlacing. Owned by the chain.
 269         movit::Effect *deinterlace_effect = nullptr;  // Owned by the chain.
 270         bool deinterlace;
 271         bool user_connectable;
 272 };
 273
 274 // Utility functions used by Scene.
 275 void add_outputs_and_finalize(movit::EffectChain *chain, bool is_main_chain);
 276 Theme *get_theme_updata(lua_State* L);
 277 bool checkbool(lua_State* L, int idx);
 278 std::string checkstdstring(lua_State *L, int index);
 279 movit::Effect *instantiate_effect(movit::EffectChain *chain, EffectType effect_type);
 280 void print_warning(lua_State* L, const char *format, ...);
 281
 282 #endif  // !defined(_THEME_H)