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         // Should be called as part of HTMLInput.new() only.
  73         void register_html_input(CEFCapture *capture)
  74         {
  75                 html_inputs.push_back(capture);
  76         }
  77
  78         std::vector<CEFCapture *> get_html_inputs() const
  79         {
  80                 return html_inputs;
  81         }
  82
  83         void register_video_signal_connection(LiveInputWrapper *live_input, FFmpegCapture *capture)
  84         {
  85                 video_signal_connections.emplace_back(live_input, capture);
  86         }
  87
  88         std::vector<std::pair<LiveInputWrapper *, FFmpegCapture *>> get_video_signal_connections() const
  89         {
  90                 return video_signal_connections;
  91         }
  92
  93         void register_html_signal_connection(LiveInputWrapper *live_input, CEFCapture *capture)
  94         {
  95                 html_signal_connections.emplace_back(live_input, capture);
  96         }
  97
  98         std::vector<std::pair<LiveInputWrapper *, CEFCapture *>> get_html_signal_connections() const
  99         {
 100                 return html_signal_connections;
 101         }
 102
 103 private:
 104         void register_constants();
 105         void register_class(const char *class_name, const luaL_Reg *funcs);
 106
 107         std::mutex m;
 108         lua_State *L;  // Protected by <m>.
 109         const InputState *input_state = nullptr;  // Protected by <m>. Only set temporarily, during chain setup.
 110         movit::ResourcePool *resource_pool;
 111         int num_channels;
 112         unsigned num_cards;
 113
 114         std::mutex map_m;
 115         std::map<int, int> signal_to_card_mapping;  // Protected by <map_m>.
 116
 117         std::vector<FFmpegCapture *> video_inputs;
 118         std::vector<std::pair<LiveInputWrapper *, FFmpegCapture *>> video_signal_connections;
 119         std::vector<CEFCapture *> html_inputs;
 120         std::vector<std::pair<LiveInputWrapper *, CEFCapture *>> html_signal_connections;
 121
 122         friend class LiveInputWrapper;
 123 };
 124
 125 // LiveInputWrapper is a facade on top of an YCbCrInput, exposed to
 126 // the Lua code. It contains a function (connect_signal()) intended
 127 // to be called during chain setup, that picks out the current frame
 128 // (in the form of a set of textures) from the input state given by
 129 // the mixer, and communicates that state over to the actual YCbCrInput.
 130 class LiveInputWrapper {
 131 public:
 132         // Note: <override_bounce> is irrelevant for PixelFormat_8BitBGRA.
 133         LiveInputWrapper(Theme *theme, movit::EffectChain *chain, bmusb::PixelFormat pixel_format, bool override_bounce, bool deinterlace);
 134
 135         void connect_signal(int signal_num);  // Must be called with the theme's <m> lock held, since it accesses theme->input_state.
 136         void connect_signal_raw(int signal_num, const InputState &input_state);
 137         movit::Effect *get_effect() const
 138         {
 139                 if (deinterlace) {
 140                         return deinterlace_effect;
 141                 } else if (pixel_format == bmusb::PixelFormat_8BitBGRA) {
 142                         return rgba_inputs[0];
 143                 } else {
 144                         return ycbcr_inputs[0];
 145                 }
 146         }
 147
 148 private:
 149         Theme *theme;  // Not owned by us.
 150         bmusb::PixelFormat pixel_format;
 151         movit::YCbCrFormat input_ycbcr_format;
 152         std::vector<movit::YCbCrInput *> ycbcr_inputs;  // Multiple ones if deinterlacing. Owned by the chain.
 153         std::vector<movit::FlatInput *> rgba_inputs;  // Multiple ones if deinterlacing. Owned by the chain.
 154         movit::Effect *deinterlace_effect = nullptr;  // Owned by the chain.
 155         bool deinterlace;
 156 };
 157
 158 #endif  // !defined(_THEME_H)