2 #define _IMAGE_INPUT_H 1
7 #include <condition_variable>
14 #include "shared/ref_counted_texture.h"
15 #include "tweaked_inputs.h"
19 // An output that takes its input from a static image, loaded with ffmpeg.
20 // comes from a single 2D array with chunky pixels. The image is refreshed
21 // from disk about every second.
22 class ImageInput : public sRGBSwitchingFlatInput {
24 // For loading images.
25 // NOTE: You will need to call start_update_thread() yourself, once per program.
27 unsigned width, height;
29 timespec last_modified;
31 static std::shared_ptr<const Image> load_image(const std::string &filename, const std::string &pathname);
35 ImageInput(); // Construct an empty input, which can't be used until you call switch_image().
36 ImageInput(const std::string &filename);
38 std::string effect_type_id() const override { return "ImageInput"; }
39 void set_gl_state(GLuint glsl_program_num, const std::string& prefix, unsigned *sampler_num) override;
41 // Switch to a different image. The image must be previously loaded using load_image().
42 void switch_image(const std::string &pathname);
44 std::string get_pathname() const { return pathname; }
46 static void start_update_thread(QSurface *surface);
47 static void end_update_thread();
51 std::shared_ptr<const Image> current_image;
53 static std::shared_ptr<const Image> load_image_raw(const std::string &pathname);
54 static void update_thread_func(QSurface *surface);
55 static std::mutex all_images_lock;
56 static std::map<std::string, std::shared_ptr<const Image>> all_images; // Under all_images_lock.
58 static std::thread update_thread;
59 static std::mutex update_thread_should_quit_mu;
60 static bool update_thread_should_quit; // Under thread_should_quit_mu.
61 static std::condition_variable update_thread_should_quit_modified; // Signals when threads_should_quit is set.
64 #endif // !defined(_IMAGE_INPUT_H)