X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=nageru%2Fpbo_frame_allocator.h;h=eee25ce906d443f6656935c33e3f9cfda476af9b;hb=5a34f92eb0bf5fe911cb6ca72a18ad03ce9898ac;hp=0080dd0e97fe3ce729d37aa960895d04ffedc12e;hpb=6cf87ad853439f8565c575fb29dc539a15fdba87;p=nageru

diff --git a/nageru/pbo_frame_allocator.h b/nageru/pbo_frame_allocator.h
index 0080dd0..eee25ce 100644
--- a/nageru/pbo_frame_allocator.h
+++ b/nageru/pbo_frame_allocator.h
@@ -36,6 +36,17 @@ public:
 	Frame create_frame(size_t width, size_t height, size_t stride) override;
 	void release_frame(Frame frame) override;
 
+	// NOTE: Does not check the buffer types; they are just assumed to be compatible.
+	void reconfigure(bmusb::PixelFormat pixel_format,
+	                 size_t frame_size,
+	                 GLuint width, GLuint height,
+	                 unsigned card_index,
+	                 MJPEGEncoder *mjpeg_encoder = nullptr,
+	                 size_t num_queued_frames = 16,
+	                 GLenum buffer = GL_PIXEL_UNPACK_BUFFER_ARB,
+	                 GLenum permissions = GL_MAP_WRITE_BIT,
+	                 GLenum map_bits = GL_MAP_FLUSH_EXPLICIT_BIT);
+
 	struct Userdata {
 		GLuint pbo;
 
@@ -80,10 +91,12 @@ public:
 		uint8_t *data_copy_malloc;
 		MJPEGEncoder::VAResources va_resources;
 		MJPEGEncoder::ReleaseVAResources va_resources_release;
+
+		int generation;
 	};
 
 private:
-	void init_frame(size_t frame_idx, size_t frame_size, GLuint width, GLuint height, GLenum permissions, GLenum map_bits);
+	void init_frame(size_t frame_idx, size_t frame_size, GLuint width, GLuint height, GLenum permissions, GLenum map_bits, int generation);
 	void destroy_frame(Frame *frame);
 
 	unsigned card_index;
@@ -93,6 +106,20 @@ private:
 	std::queue<Frame> freelist;
 	GLenum buffer;
 	std::unique_ptr<Userdata[]> userdata;
+
+	// Used only for reconfigure(), to check whether we can do without.
+	size_t frame_size;
+	size_t num_queued_frames;
+	GLuint width, height;
+	GLenum permissions;
+	GLenum map_bits;
+	int generation = 0;  // Under freelist_mutex.
+
+	struct LingeringGeneration {
+		std::unique_ptr<Userdata[]> userdata;
+		size_t num_frames_left;
+	};
+	std::map<int, LingeringGeneration> lingering_generations;
 };
 
 #endif  // !defined(_PBO_FRAME_ALLOCATOR)