video_capture API: const struct to init

the init should accept rather the ptr to const struct with init params
2026-03-21 18:40:16 +00:00 · 2026-03-10 11:27:55 +01:00
parent 81930ee494
commit 388e87e847
33 changed files with 75 additions and 68 deletions
--- a/src/aja_win32_stub.cpp
+++ b/src/aja_win32_stub.cpp
@@ -6,7 +6,7 @@
 * would be otherwise referenced directly (audio_capture_channels).
 */
 /*
- * Copyright (c) 2017-2023 CESNET z.s.p.o.
+ * Copyright (c) 2017-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -43,14 +43,14 @@
 #include "video_display.h"

 extern "C" {
-__declspec(dllimport) int vidcap_aja_init(struct vidcap_params *params, void **state);
+__declspec(dllimport) int vidcap_aja_init(const struct vidcap_params *params, void **state);
 __declspec(dllimport) void vidcap_aja_done(void *state);
 __declspec(dllimport) struct video_frame *vidcap_aja_grab(void *state, struct audio_frame **audio);
 __declspec(dllimport) void vidcap_aja_probe(struct device_info **available_cards, int *count, void (**deleter)(void *));
 __declspec(dllimport) unsigned int *aja_audio_capture_channels;
 }

-static int vidcap_aja_init_proxy(struct vidcap_params *params, void **state) {
+static int vidcap_aja_init_proxy(const struct vidcap_params *params, void **state) {
        aja_audio_capture_channels = &audio_capture_channels;
        return vidcap_aja_init(params, state);
 }
--- a/src/video_capture.h
+++ b/src/video_capture.h
@@ -12,7 +12,7 @@
 * @ingroup vidcap
 */
 /*
- * Copyright (c) 2005-2024 CESNET
+ * Copyright (c) 2005-2026 CESNET, zájmové sdružení právnických osob
 * Copyright (c) 2002 University of Southern California
 *
 * Redistribution and use in source and binary forms, with or without
@@ -106,7 +106,7 @@
 #include "types.h"
 #include "video_capture_params.h"

-#define VIDEO_CAPTURE_ABI_VERSION 13
+#define VIDEO_CAPTURE_ABI_VERSION 14

 #ifdef __cplusplus
 extern "C" {
@@ -136,7 +136,7 @@ struct video_capture_info {
         * @param[out] state  returned capture state
         * @returns           one of @ref vidcap_retval
         */
-        int                    (*init) (struct vidcap_params *param, void **state);
+        int                    (*init) (const struct vidcap_params *param, void **state);
        void                   (*done) (void *state);
        struct video_frame    *(*grab) (void *state, struct audio_frame **audio);
        const char             *generic_fps_indicator_prefix; ///< display name, eg. "[gl] ",
--- a/src/video_capture/DirectShowGrabber.cpp
+++ b/src/video_capture/DirectShowGrabber.cpp
@@ -824,7 +824,7 @@ static void vidcap_dshow_should_exit(void *state) {
 	WakeConditionVariable(&s->grabWaitCV);
 }

-static int vidcap_dshow_init(struct vidcap_params *params, void **state) {
+static int vidcap_dshow_init(const struct vidcap_params *params, void **state) {
 #define HANDLE_ERR(msg, ...) \
        HANDLE_ERR_ACTION(res, goto error, \
                          "vidcap_dshow_init: " msg __VA_OPT__(, ) __VA_ARGS__)
--- a/src/video_capture/aggregate.c
+++ b/src/video_capture/aggregate.c
@@ -5,7 +5,7 @@
 * @brief Aggregate video capture driver
 */
 /*
- * Copyright (c) 2012-2023 CESNET z.s.p.o.
+ * Copyright (c) 2012-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -88,7 +88,7 @@ static void vidcap_aggregate_probe(struct device_info **cards, int *count, void
 }

 static int
-vidcap_aggregate_init(struct vidcap_params *params, void **state)
+vidcap_aggregate_init(const struct vidcap_params *params, void **state)
 {
 	struct vidcap_aggregate_state *s;

@@ -113,7 +113,7 @@ vidcap_aggregate_init(struct vidcap_params *params, void **state)


        s->devices_cnt = 0;
-        struct vidcap_params *tmp = params;
+        const struct vidcap_params *tmp = params;
        while((tmp = vidcap_params_get_next(tmp))) {
                if (vidcap_params_get_driver(tmp) != NULL)
                        s->devices_cnt++;
@@ -125,12 +125,16 @@ vidcap_aggregate_init(struct vidcap_params *params, void **state)
        tmp = params;
        for (int i = 0; i < s->devices_cnt; ++i) {
                tmp = vidcap_params_get_next(tmp);
+                struct vidcap_params *copy = vidcap_params_copy(tmp);

                if (vidcap_params_get_flags(tmp) == 0 && vidcap_params_get_flags(params) != 0) {
-                        vidcap_params_set_flags(tmp, vidcap_params_get_flags(params));
+                        vidcap_params_set_flags(copy, vidcap_params_get_flags(params));
                }

-                int ret = initialize_video_capture(vidcap_params_get_parent(params), (struct vidcap_params *) tmp, &s->devices[i]);
+                const int ret = initialize_video_capture(
+                    vidcap_params_get_parent(params),
+                    (struct vidcap_params *) copy, &s->devices[i]);
+                vidcap_params_free_struct(copy);
                if(ret != 0) {
                        fprintf(stderr, "[aggregate] Unable to initialize device %d (%s:%s).\n",
                                        i, vidcap_params_get_driver(tmp),
--- a/src/video_capture/aja.cpp
+++ b/src/video_capture/aja.cpp
@@ -5,7 +5,7 @@
 * Based on AJA samples ntv2framegrabber, ntv2capture and ntv2llburn (Ping-Pong)
 */
 /*
- * Copyright (c) 2015-2024 CESNET
+ * Copyright (c) 2015-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -1090,7 +1090,7 @@ static void show_help() {
        col() << "\n";
 }

-LINK_SPEC int vidcap_aja_init(struct vidcap_params *params, void **state)
+LINK_SPEC int vidcap_aja_init(const struct vidcap_params *params, void **state)
 {
        unordered_map<string, string> parameters_map;
        char *tmp = strdup(vidcap_params_get_fmt(params));
--- a/src/video_capture/avfoundation.mm
+++ b/src/video_capture/avfoundation.mm
@@ -773,7 +773,7 @@ parse_fmt(char *fmt)
        return init_params;
 }

-static int vidcap_avfoundation_init(struct vidcap_params *params, void **state)
+static int vidcap_avfoundation_init(const struct vidcap_params *params, void **state)
 {
@autoreleasepool {
        if (avfoundation_usage(vidcap_params_get_fmt(params))) {
--- a/src/video_capture/bitflow.cpp
+++ b/src/video_capture/bitflow.cpp
@@ -3,7 +3,7 @@
 * @author Martin Pulec <pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2017-2025 CESNET
+ * Copyright (c) 2017-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -135,7 +135,7 @@ static float get_fps(struct vidcap_state_bitflow *s) {
        return 0;
 }

-static int vidcap_bitflow_init(struct vidcap_params *params, void **state)
+static int vidcap_bitflow_init(const struct vidcap_params *params, void **state)
 {
        if (vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) {
                return VIDCAP_INIT_AUDIO_NOT_SUPPORTED;
--- a/src/video_capture/bluefish444.cpp
+++ b/src/video_capture/bluefish444.cpp
@@ -3,7 +3,7 @@
 * @author Martin Pulec     <pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2015-2023 CESNET, z. s. p. o.
+ * Copyright (c) 2015-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -764,7 +764,7 @@ static void parse_fmt(struct vidcap_bluefish444_state *s, char *fmt) {
 }

 static int
-vidcap_bluefish444_init(struct vidcap_params *params, void **state)
+vidcap_bluefish444_init(const struct vidcap_params *params, void **state)
 {
 	struct vidcap_bluefish444_state *s;
        ULONG InputChannels[4] = {
--- a/src/video_capture/decklink.cpp
+++ b/src/video_capture/decklink.cpp
@@ -1457,7 +1457,7 @@ bool device_state::init(struct vidcap_decklink_state *s, struct tile *t, BMDAudi
 }

 static int
-vidcap_decklink_init(struct vidcap_params *params, void **state)
+vidcap_decklink_init(const struct vidcap_params *params, void **state)
 {
        const char *fmt = vidcap_params_get_fmt(params);

--- a/src/video_capture/deltacast.cpp
+++ b/src/video_capture/deltacast.cpp
@@ -8,7 +8,7 @@
 * @sa deltacast_common.hpp for common DELTACAST information
 */
 /*
- * Copyright (c) 2011-2025 CESNET
+ * Copyright (c) 2011-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -428,7 +428,7 @@ static bool parse_fmt(struct vidcap_deltacast_state *s, char *init_fmt,
 }

 static int
-vidcap_deltacast_init(struct vidcap_params *params, void **state)
+vidcap_deltacast_init(const struct vidcap_params *params, void **state)
 {
 #define HANDLE_ERROR vidcap_deltacast_done(s); return VIDCAP_INIT_FAIL;
 	struct vidcap_deltacast_state *s = nullptr;
--- a/src/video_capture/deltacast_dvi.cpp
+++ b/src/video_capture/deltacast_dvi.cpp
@@ -484,7 +484,7 @@ static bool load_custom_edid(const char *filename, BYTE *pEEDIDBuffer, ULONG *pE
 }

 static int
-vidcap_deltacast_dvi_init(struct vidcap_params *params, void **state)
+vidcap_deltacast_dvi_init(const struct vidcap_params *params, void **state)
 {
 	struct vidcap_deltacast_dvi_state *s;
        ULONG Width = 0, Height = 0, RefreshRate = 0;
--- a/src/video_capture/dvs.c
+++ b/src/video_capture/dvs.c
@@ -10,7 +10,7 @@
 *         Ian Wesley-Smith <iwsmith@cct.lsu.edu>
 *
 * Copyright (c) 2001-2003 University of Southern California
- * Copyright (c) 2005-2023 CESNET z.s.p.o.
+ * Copyright (c) 2005-2026 CESNET, zájmové sdružení právnických osob
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions
@@ -230,7 +230,7 @@ static void show_help(void)

 /* External API ***********************************************************************************/

-static int vidcap_dvs_init(struct vidcap_params *params, void **state)
+static int vidcap_dvs_init(const struct vidcap_params *params, void **state)
 {
        struct vidcap_dvs_state *s;
        int i;
--- a/src/video_capture/file.c
+++ b/src/video_capture/file.c
@@ -5,7 +5,7 @@
 * Libavformat demuxer and decompress
 */
 /*
- * Copyright (c) 2019-2025 CESNET
+ * Copyright (c) 2019-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -771,7 +771,7 @@ static int get_ach_count(int file_channels) {
 }

 #define CHECK(call) { int ret = call; if (ret != 0) abort(); }
-static int vidcap_file_init(struct vidcap_params *params, void **state) {
+static int vidcap_file_init(const struct vidcap_params *params, void **state) {
        bool opportunistic_audio = false; // do not fail if audio requested but not found
        int rc = 0;
        char errbuf[1024] = "";
--- a/src/video_capture/gpustitch.cpp
+++ b/src/video_capture/gpustitch.cpp
@@ -510,7 +510,7 @@ static void stop_grab_workers(vidcap_gpustitch_state *s){
 }

 static int
-vidcap_gpustitch_init(struct vidcap_params *params, void **state)
+vidcap_gpustitch_init(const struct vidcap_params *params, void **state)
 {
        printf("vidcap_gpustitch_init\n");

--- a/src/video_capture/import.c
+++ b/src/video_capture/import.c
@@ -3,7 +3,7 @@
 * @author Martin Pulec     <pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2012-2023 CESNET, z. s. p. o.
+ * Copyright (c) 2012-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -507,7 +507,7 @@ static bool initialize_import(struct vidcap_import_state *s, char *tmp, FILE **i
 }

 static int
-vidcap_import_init(struct vidcap_params *params, void **state)
+vidcap_import_init(const struct vidcap_params *params, void **state)
 {
        char *tmp = strdup(vidcap_params_get_fmt(params));
        if (strlen(tmp) == 0 || strcmp(tmp, "help") == 0) {
--- a/src/video_capture/ndi.cpp
+++ b/src/video_capture/ndi.cpp
@@ -177,7 +177,7 @@ static void show_help(struct vidcap_state_ndi *s) {
        s->NDIlib->find_destroy(pNDI_find);
 }

-static int vidcap_ndi_init(struct vidcap_params *params, void **state)
+static int vidcap_ndi_init(const struct vidcap_params *params, void **state)
 {
        NDI_PRINT_COPYRIGHT(void);
        using namespace std::string_literals;
--- a/src/video_capture/null.c
+++ b/src/video_capture/null.c
@@ -6,7 +6,7 @@
 * hardware or do not wish to transmit. This fits the interface of the other
 * capture devices, but never produces any video.
 *
- * Copyright (c) 2005-2025 CESNET
+ * Copyright (c) 2005-2026 CESNET, zájmové sdružení právických osob
 * Copyright (c) 2004 University of Glasgow
 * Copyright (c) 2003 University of Southern California
 *
@@ -62,7 +62,7 @@ struct vidcap_params;

 static int capture_state = 0;

-static int vidcap_null_init(struct vidcap_params *params, void **state)
+static int vidcap_null_init(const struct vidcap_params *params, void **state)
 {
        if (vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) {
                return VIDCAP_INIT_AUDIO_NOT_SUPPORTED;
--- a/src/video_capture/pipewire.cpp
+++ b/src/video_capture/pipewire.cpp
@@ -4,7 +4,7 @@
 * @author Martin Piatka     <piatka@cesnet.cz>
 */
 /*
- * Copyright (c) 2023 CESNET z.s.p.o.
+ * Copyright (c) 2023-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -499,7 +499,7 @@ static void show_generic_help(){
 }


-static int parse_params(struct vidcap_params *params, vcap_pw_state *s) {
+static int parse_params(const struct vidcap_params *params, vcap_pw_state *s) {
        if(const char *fmt = vidcap_params_get_fmt(params)) {        
                std::istringstream params_stream(fmt);
                
@@ -543,7 +543,7 @@ static int parse_params(struct vidcap_params *params, vcap_pw_state *s) {
 }

 #ifdef HAVE_DBUS_SCREENCAST
-static int vidcap_screen_pw_init(struct vidcap_params *params, void **state)
+static int vidcap_screen_pw_init(const struct vidcap_params *params, void **state)
 {
        if (vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) {
                return VIDCAP_INIT_AUDIO_NOT_SUPPORTED;
@@ -585,7 +585,7 @@ static int vidcap_screen_pw_init(struct vidcap_params *params, void **state)
 }
 #endif

-static int vidcap_pw_init(struct vidcap_params *params, void **state)
+static int vidcap_pw_init(const struct vidcap_params *params, void **state)
 {
        if (vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) {
                return VIDCAP_INIT_AUDIO_NOT_SUPPORTED;
--- a/src/video_capture/rtsp.c
+++ b/src/video_capture/rtsp.c
@@ -3,7 +3,7 @@
 *           Martin German <martin.german@i2cat.net>
 *
 * Copyright (c) 2005-2010 Fundació i2CAT, Internet I Innovació Digital a Catalunya
- * Copyright (c) 2015-2025 CESNET
+ * Copyright (c) 2015-2026 CESNET, zájmové sdružení právických osob
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions
@@ -588,7 +588,7 @@ check_uri(size_t uri_len, char *uri)
                    return VIDCAP_INIT_FAIL;

 static int
-vidcap_rtsp_init(struct vidcap_params *params, void **state) {
+vidcap_rtsp_init(const struct vidcap_params *params, void **state) {
    char fmt[STR_LEN];
    snprintf(fmt, sizeof fmt,  "%s", vidcap_params_get_fmt(params));
    if (strcmp(fmt, "help") == 0 || strcmp(fmt, "fullhelp") == 0) {
--- a/src/video_capture/screen_avf.c
+++ b/src/video_capture/screen_avf.c
@@ -102,7 +102,7 @@ contains_dev_spec(char *fmt)
 }

 static int
-vidcap_screen_avf_init(struct vidcap_params *params, void **state)
+vidcap_screen_avf_init(const struct vidcap_params *params, void **state)
 {
        const char *fmt = vidcap_params_get_fmt(params);

--- a/src/video_capture/screen_linux.c
+++ b/src/video_capture/screen_linux.c
@@ -5,7 +5,7 @@
 * X11/PipeWire screen capture abstraction
 */
 /*
- * Copyright (c) 2023-2025 CESNET
+ * Copyright (c) 2023-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -62,7 +62,7 @@ static void vidcap_screen_linux_probe(struct device_info **cards, int *count, vo
 }

 static int
-vidcap_screen_linux_init(struct vidcap_params *params, void **state)
+vidcap_screen_linux_init(const struct vidcap_params *params, void **state)
 {
        struct vidcap *device = NULL;

--- a/src/video_capture/screen_osx.c
+++ b/src/video_capture/screen_osx.c
@@ -143,7 +143,7 @@ static void vidcap_screen_osx_probe(struct device_info **available_cards, int *c
        }
 }

-static int vidcap_screen_osx_init(struct vidcap_params *params, void **state)
+static int vidcap_screen_osx_init(const struct vidcap_params *params, void **state)
 {
        struct vidcap_screen_osx_state *s;

--- a/src/video_capture/screen_win.c
+++ b/src/video_capture/screen_win.c
@@ -9,7 +9,7 @@
 * - load the dll even if working directory is not the dir with the DLL
 */
 /*
- * Copyright (c) 2019-2025 CESNET
+ * Copyright (c) 2019-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -461,7 +461,7 @@ static int run_child_process() {
        return ret;
 }

-static int vidcap_screen_win_init(struct vidcap_params *params, void **state)
+static int vidcap_screen_win_init(const struct vidcap_params *params, void **state)
 {
        const char *cfg = vidcap_params_get_fmt(params);
        bool child = false; // to prevent fork bombs if error
--- a/src/video_capture/screen_x11.c
+++ b/src/video_capture/screen_x11.c
@@ -3,7 +3,7 @@
 * @author Martin Pulec     <pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2012-2025 CESNET, zájmové sdružení právnických osob
+ * Copyright (c) 2012-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -323,7 +323,7 @@ static _Bool parse_fmt(struct vidcap_screen_x11_state *s, char *fmt) {
        return 1;
 }

-static int vidcap_screen_x11_init(struct vidcap_params *params, void **state)
+static int vidcap_screen_x11_init(const struct vidcap_params *params, void **state)
 {
        printf("vidcap_screen_init\n");

--- a/src/video_capture/spout.cpp
+++ b/src/video_capture/spout.cpp
@@ -148,7 +148,7 @@ check_lib()
        printf("SpoutLibrary vtable doesn't seem to be corrupted.\n");
 }

-static int vidcap_spout_init(struct vidcap_params *params, void **state)
+static int vidcap_spout_init(const struct vidcap_params *params, void **state)
 {
        if ((vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) != 0U) {
                return VIDCAP_INIT_AUDIO_NOT_SUPPORTED;
--- a/src/video_capture/switcher.c
+++ b/src/video_capture/switcher.c
@@ -178,7 +178,7 @@ parse_fmt(struct vidcap_switcher_state *s, char *cfg)
 }

 static int
-vidcap_switcher_init(struct vidcap_params *params, void **state)
+vidcap_switcher_init(const struct vidcap_params *params, void **state)
 {
        verbose_msg("vidcap_switcher_init\n");

@@ -203,7 +203,7 @@ vidcap_switcher_init(struct vidcap_params *params, void **state)
        s->mod.cls = MODULE_CLASS_DATA;
        module_register(&s->mod, vidcap_params_get_parent(params));
        s->devices_cnt = 0;
-        struct vidcap_params *tmp = params;
+        const struct vidcap_params *tmp = params;
        while((tmp = vidcap_params_get_next(tmp))) {
                if (vidcap_params_get_driver(tmp) == NULL) {
                        break;
@@ -232,11 +232,13 @@ vidcap_switcher_init(struct vidcap_params *params, void **state)
                        continue;
                }

-                if (vidcap_params_get_flags(tmp) == 0 && vidcap_params_get_flags(params) != 0) {
-                        vidcap_params_set_flags(tmp, vidcap_params_get_flags(params));
+                struct vidcap_params *copy = vidcap_params_copy(tmp);
+                if (vidcap_params_get_flags(copy) == 0 && vidcap_params_get_flags(params) != 0) {
+                        vidcap_params_set_flags(copy, vidcap_params_get_flags(params));
                }

-                int ret = initialize_video_capture(&s->mod, tmp, &s->devices[i]);
+                int ret = initialize_video_capture(&s->mod, copy, &s->devices[i]);
+                vidcap_params_free_struct(copy);
                if(ret != 0) {
                        MSG(ERROR,
                            "Unable to initialize device %d (%s:%s).\n",
@@ -246,7 +248,7 @@ vidcap_switcher_init(struct vidcap_params *params, void **state)
                }
        }

-        s->params = params;
+        s->params = vidcap_params_copy(tmp);

        vidcap_switcher_register_keyboard_ctl(s);

@@ -276,6 +278,7 @@ vidcap_switcher_done(void *state)
        module_done(&s->mod);
        free(s->devices);
        free(s->device_names);
+        vidcap_params_free_struct(s->params);
        free(s);
 }

--- a/src/video_capture/swmix.c
+++ b/src/video_capture/swmix.c
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2012-2023 CESNET z.s.p.o.
+ * Copyright (c) 2012-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -1083,7 +1083,7 @@ static bool parse(struct vidcap_swmix_state *s, struct video_desc *desc, char *f
 }

 static int
-vidcap_swmix_init(struct vidcap_params *params, void **state)
+vidcap_swmix_init(const struct vidcap_params *params, void **state)
 {
        GLenum format;

--- a/src/video_capture/syphon.m
+++ b/src/video_capture/syphon.m
@@ -3,7 +3,7 @@
 * @author Martin Pulec     <pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2017-2023 CESNET, z. s. p. o.
+ * Copyright (c) 2017-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -442,7 +442,7 @@ static int vidcap_syphon_init_common(char *opts, struct state_vidcap_syphon **ou
        return VIDCAP_INIT_OK;
 }

-static int vidcap_syphon_init(struct vidcap_params *params, void **state)
+static int vidcap_syphon_init(const struct vidcap_params *params, void **state)
 {
        if ((vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) != 0U) {
                return VIDCAP_INIT_AUDIO_NOT_SUPPORTED;
--- a/src/video_capture/testcard.c
+++ b/src/video_capture/testcard.c
@@ -12,7 +12,7 @@
 */
 /*
 * Copyright (c) 2005-2006 University of Glasgow
- * Copyright (c) 2005-2025 CESNET
+ * Copyright (c) 2005-2026 CESNET, zájmové sdružení právických osob
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions
@@ -505,7 +505,7 @@ validate_settings(struct testcard_state *s, struct video_desc desc)
        return true;
 }

-static int vidcap_testcard_init(struct vidcap_params *params, void **state)
+static int vidcap_testcard_init(const struct vidcap_params *params, void **state)
 {
        struct testcard_state *s = NULL;
        char *filename = NULL;
--- a/src/video_capture/testcard2.c
+++ b/src/video_capture/testcard2.c
@@ -6,7 +6,7 @@
 * Merge to mainline testcard.
 */
 /*
- * Copyright (c) 2011-2025 CESNET, zájmové sdružení právnických osob
+ * Copyright (c) 2011-2026 CESNET, zájmové sdružení právnických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -314,7 +314,7 @@ get_sdl_render_font()
 }
 #endif

-static int vidcap_testcard2_init(struct vidcap_params *params, void **state)
+static int vidcap_testcard2_init(const struct vidcap_params *params, void **state)
 {
        if (vidcap_params_get_fmt(params) == NULL || strcmp(vidcap_params_get_fmt(params), "help") == 0) {
                usage();
--- a/src/video_capture/ug_input.cpp
+++ b/src/video_capture/ug_input.cpp
@@ -3,7 +3,7 @@
 * @author Martin Pulec     <pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2014-2023 CESNET, z. s. p. o.
+ * Copyright (c) 2014-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -138,7 +138,7 @@ parse_fmt(char *fmt, uint16_t *port, codec_t *decode_to)
        return true;
 }

-static int vidcap_ug_input_init(struct vidcap_params *cap_params, void **state)
+static int vidcap_ug_input_init(const struct vidcap_params *cap_params, void **state)
 {
        uint16_t port = 5004;
        codec_t  decode_to = VIDEO_CODEC_NONE;
--- a/src/video_capture/v4l2.c
+++ b/src/video_capture/v4l2.c
@@ -5,7 +5,7 @@
 * @author  Martin Pulec     <martin.pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2012-2025 CESNET
+ * Copyright (c) 2012-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -586,7 +586,7 @@ parse_fmt(char *fmt, struct parsed_opts *opts)
        return true;
 }

-static int vidcap_v4l2_init(struct vidcap_params *params, void **state)
+static int vidcap_v4l2_init(const struct vidcap_params *params, void **state)
 {
        struct parsed_opts opts = { .buffer_count = DEFAULT_BUF_COUNT };

--- a/src/video_capture/ximea.c
+++ b/src/video_capture/ximea.c
@@ -3,7 +3,7 @@
 * @author Martin Pulec     <martin.pulec@cesnet.cz>
 */
 /*
- * Copyright (c) 2019-2025 CESNET
+ * Copyright (c) 2019-2026 CESNET, zájmové sdružení právických osob
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
@@ -231,7 +231,7 @@ static int vidcap_ximea_parse_params(struct state_vidcap_ximea *s, char *cfg) {
                goto error; \
        } \
 } while(0)
-static int vidcap_ximea_init(struct vidcap_params *params, void **state)
+static int vidcap_ximea_init(const struct vidcap_params *params, void **state)
 {
        if (vidcap_params_get_flags(params) & VIDCAP_FLAG_AUDIO_ANY) {
                return VIDCAP_INIT_AUDIO_NOT_SUPPORTED;