Use variable framerate, add CLI option to override pixelformat metadata

include/screencast_common.h

@@ -45,7 +45,6 @@ struct screencast_context {
 
 	// pipewire
 	struct pwr_type type;
-
 	struct pw_main_loop *loop;
 	struct spa_source *event;
 	struct pw_core *core;
@@ -57,13 +56,10 @@ struct screencast_context {
 	struct spa_video_info_raw pwr_format;
 	uint32_t seq;
 	uint32_t node_id;
-
 	bool stream_state;
-
 	pthread_t pwr_thread;
 
 	// wlroots
-
 	struct wl_display *display;
 	struct wl_list output_list;
 	struct wl_registry *registry;
@@ -85,6 +81,9 @@ struct screencast_context {
 	// frame mutex
 	pthread_mutex_t lock;
 
+	// cli options
+	const char *forced_pixelformat;
+
 	// if something happens during capture
 	int err;
 	bool quit;

include/xdpw.h

@@ -19,7 +19,7 @@ enum {
 };
 
 int init_screenshot(sd_bus *bus);
-int init_screencast(sd_bus *bus);
+int init_screencast(sd_bus *bus, const char *forced_pixelformat);
 
 struct xdpw_request *request_create(sd_bus *bus, const char *object_path);
 void request_destroy(struct xdpw_request *req);

src/core/main.c

@@ -1,10 +1,52 @@
 #include <stdlib.h>
 #include <stdio.h>
+#include <getopt.h>
 #include "xdpw.h"
 
 static const char service_name[] = "org.freedesktop.impl.portal.desktop.wlr";
 
+int xdpw_usage(FILE* stream, int rc)
+{
+	static const char* usage =
+"Usage: xdg-desktop-portal-wlr [options]\n"
+"\n"
+"    -p,--pixelformat=BGRx|RGBx                Force a pixelformat in pipewire\n"
+"                                              metadata (performs no conversion).\n"
+"    -h,--help                                 Get help (this text).\n"
+"\n";
+
+	fprintf(stream, "%s", usage);
+
+	return rc;
+}
+
 int main(int argc, char *argv[]) {
+
+	const char* forced_pixelformat = NULL;
+
+	static const char* shortopts = "p:h";
+	static const struct option longopts[] = {
+		{ "pixelformat", required_argument, NULL, 'p' },
+		{ "help", no_argument, NULL, 'h' },
+		{ NULL, 0, NULL, 0 }
+	};
+
+	while (1) {
+		int c = getopt_long(argc, argv, shortopts, longopts, NULL);
+		if (c < 0)
+			break;
+
+		switch (c) {
+		case 'p':
+			forced_pixelformat = optarg;
+			break;
+		case 'h':
+			return xdpw_usage(stdout, 0);
+		default:
+			return xdpw_usage(stderr, 1);
+		}
+	}
+
 	int ret = 0;
 
 	sd_bus *bus = NULL;
@@ -15,7 +57,7 @@ int main(int argc, char *argv[]) {
 	}
 
 	init_screenshot(bus);
-	init_screencast(bus);
+	init_screencast(bus, forced_pixelformat);
 
 	ret = sd_bus_request_name(bus, service_name, 0);
 	if (ret < 0) {

src/screencast/pipewire_screencast.c

@@ -174,6 +174,10 @@ static void pwr_handle_state_changed(void *data, enum pw_remote_state old,
 				&SPA_RECTANGLE(ctx->simple_frame.width, ctx->simple_frame.height),
 				SPA_POD_PROP_MIN_MAX(&SPA_RECTANGLE(1, 1), &SPA_RECTANGLE(4096, 4096)),
 				":", ctx->type.format_video.framerate, "F",
+				// specify variable framerate
+				&SPA_FRACTION(0, 1),
+				":", ctx->type.format_video.max_framerate, "F",
+				// with a maximum at the wlroots specified hardware framerate
 				&SPA_FRACTION(ctx->framerate, 1));
 
 		pw_stream_add_listener(ctx->stream, &ctx->stream_listener,

src/screencast/screencast.c

@@ -300,11 +300,12 @@ static const sd_bus_vtable screencast_vtable[] = {
 	SD_BUS_VTABLE_END
 };
 
-int init_screencast(sd_bus *bus) {
+int init_screencast(sd_bus *bus, const char *forced_pixelformat) {
 	// TODO: cleanup
 	sd_bus_slot *slot = NULL;
 
 	//struct screencast_context ctx = (struct screencast_context){0};
+	ctx.forced_pixelformat = forced_pixelformat;
 	ctx.simple_frame = (struct simple_frame){0};
 	ctx.simple_frame.damage = &(struct damage){0};
 

src/screencast/screencast_common.c

@@ -10,6 +10,16 @@ char *strdup(const char *src) {
 
 uint32_t pipewire_from_wl_shm(void *data) {
 	struct screencast_context *ctx = data;
+
+	if(ctx->forced_pixelformat){
+		if(strcmp(ctx->forced_pixelformat, "BGRx") == 0) {
+			return ctx->type.video_format.BGRx;
+		}
+		if(strcmp(ctx->forced_pixelformat, "RGBx") == 0){
+			return ctx->type.video_format.RGBx;
+		}
+	}
+
 	switch (ctx->simple_frame.format) {
 		case WL_SHM_FORMAT_ARGB8888:
 			return ctx->type.video_format.BGRA;

src/screencast/wlr_screencast.c

@@ -161,7 +161,7 @@ static void wlr_output_handle_mode(void *data, struct wl_output *wl_output,
 																	 int32_t height, int32_t refresh) {
 	if (flags & WL_OUTPUT_MODE_CURRENT) {
 		struct wayland_output *output = data;
-		output->framerate = (float)refresh * 1000;
+		output->framerate = (float)refresh/1000;
 	}
 }