#include "vlc-video-plugin.h"
#include <media-io/video-frame.h>
#include <util/threading.h>
#include <util/platform.h>
#include <util/dstr.h>

#define do_log(level, format, ...) \
	blog(level, "[vlc_source: '%s'] " format, \
			obs_source_get_name(ss->source), ##__VA_ARGS__)

#define warn(format, ...)  do_log(LOG_WARNING, format, ##__VA_ARGS__)

#define S_PLAYLIST                     "playlist"
#define S_LOOP                         "loop"
#define S_BEHAVIOR                     "playback_behavior"
#define S_BEHAVIOR_STOP_RESTART        "stop_restart"
#define S_BEHAVIOR_PAUSE_UNPAUSE       "pause_unpause"
#define S_BEHAVIOR_ALWAYS_PLAY         "always_play"

#define T_(text) obs_module_text(text)
#define T_PLAYLIST                     T_("Playlist")
#define T_LOOP                         T_("LoopPlaylist")
#define T_BEHAVIOR                     T_("PlaybackBehavior")
#define T_BEHAVIOR_STOP_RESTART        T_("PlaybackBehavior.StopRestart")
#define T_BEHAVIOR_PAUSE_UNPAUSE       T_("PlaybackBehavior.PauseUnpause")
#define T_BEHAVIOR_ALWAYS_PLAY         T_("PlaybackBehavior.AlwaysPlay")

/* ------------------------------------------------------------------------- */

struct media_file_data {
	char *path;
	libvlc_media_t *media;
};

enum behavior {
	BEHAVIOR_STOP_RESTART,
	BEHAVIOR_PAUSE_UNPAUSE,
	BEHAVIOR_ALWAYS_PLAY,
};

struct vlc_source {
	obs_source_t *source;

	libvlc_media_player_t *media_player;
	libvlc_media_list_player_t *media_list_player;

	struct obs_source_frame frame;
	struct obs_source_audio audio;
	size_t audio_capacity;

	pthread_mutex_t mutex;
	DARRAY(struct media_file_data) files;
	enum behavior behavior;
	bool loop;
};

static libvlc_media_t *get_media(struct darray *array, const char *path)
{
	DARRAY(struct media_file_data) files;
	libvlc_media_t *media = NULL;

	files.da = *array;

	for (size_t i = 0; i < files.num; i++) {
		const char *cur_path = files.array[i].path;

		if (strcmp(path, cur_path) == 0) {
			media = files.array[i].media;
			libvlc_media_retain_(media);
			break;
		}
	}

	return media;
}

static inline libvlc_media_t *create_media_from_file(const char *file)
{
	return libvlc_media_new_path_(libvlc, file);
}

static void free_files(struct darray *array)
{
	DARRAY(struct media_file_data) files;
	files.da = *array;

	for (size_t i = 0; i < files.num; i++) {
		bfree(files.array[i].path);
		libvlc_media_release_(files.array[i].media);
	}

	da_free(files);
}

static inline bool chroma_is(const char *chroma, const char *val)
{
	return *(uint32_t*)chroma == *(uint32_t*)val;
}

static enum video_format convert_vlc_video_format(char *chroma, bool *full)
{
	*full = false;

#define CHROMA_TEST(val, ret) \
	if (chroma_is(chroma, val)) return ret
#define CHROMA_CONV(val, new_val, ret) \
	do { \
		if (chroma_is(chroma, val)) { \
			*(uint32_t*)chroma = *(uint32_t*)new_val; \
			return ret; \
		} \
	} while (false)
#define CHROMA_CONV_FULL(val, new_val, ret) \
	do { \
		*full = true; \
		CHROMA_CONV(val, new_val, ret); \
	} while (false)

	CHROMA_TEST("RGBA", VIDEO_FORMAT_RGBA);
	CHROMA_TEST("BGRA", VIDEO_FORMAT_BGRA);

	/* 4:2:0 formats */
	CHROMA_TEST("NV12", VIDEO_FORMAT_NV12);
	CHROMA_TEST("I420", VIDEO_FORMAT_I420);
	CHROMA_TEST("IYUV", VIDEO_FORMAT_I420);
	CHROMA_CONV("NV21", "NV12", VIDEO_FORMAT_NV12);
	CHROMA_CONV("I422", "NV12", VIDEO_FORMAT_NV12);
	CHROMA_CONV("Y42B", "NV12", VIDEO_FORMAT_NV12);
	CHROMA_CONV("YV12", "NV12", VIDEO_FORMAT_NV12);
	CHROMA_CONV("yv12", "NV12", VIDEO_FORMAT_NV12);

	CHROMA_CONV_FULL("J420", "J420", VIDEO_FORMAT_I420);

	/* 4:2:2 formats */
	CHROMA_TEST("UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("UYNV", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("UYNY", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("Y422", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("HDYC", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("AVUI", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("uyv1", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("2vuy", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("2Vuy", VIDEO_FORMAT_UYVY);
	CHROMA_TEST("2Vu1", VIDEO_FORMAT_UYVY);

	CHROMA_TEST("YUY2", VIDEO_FORMAT_YUY2);
	CHROMA_TEST("YUYV", VIDEO_FORMAT_YUY2);
	CHROMA_TEST("YUNV", VIDEO_FORMAT_YUY2);
	CHROMA_TEST("V422", VIDEO_FORMAT_YUY2);

	CHROMA_TEST("YVYU", VIDEO_FORMAT_YVYU);

	CHROMA_CONV("v210", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("cyuv", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("CYUV", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("VYUY", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("NV16", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("NV61", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("I410", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("I422", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("Y42B", "UYVY", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("J422", "UYVY", VIDEO_FORMAT_UYVY);

	/* 4:4:4 formats */
	CHROMA_TEST("I444", VIDEO_FORMAT_I444);
	CHROMA_CONV_FULL("J444", "J444", VIDEO_FORMAT_I444);
	CHROMA_CONV("YUVA", "RGBA", VIDEO_FORMAT_RGBA);

	/* 4:4:0 formats */
	CHROMA_CONV("I440", "I444", VIDEO_FORMAT_I444);
	CHROMA_CONV("J440", "I444", VIDEO_FORMAT_I444);

	/* 4:1:0 formats */
	CHROMA_CONV("YVU9", "NV12", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("I410", "NV12", VIDEO_FORMAT_UYVY);

	/* 4:1:1 formats */
	CHROMA_CONV("I411", "NV12", VIDEO_FORMAT_UYVY);
	CHROMA_CONV("Y41B", "NV12", VIDEO_FORMAT_UYVY);

	/* greyscale formats */
	CHROMA_TEST("GREY", VIDEO_FORMAT_Y800);
	CHROMA_TEST("Y800", VIDEO_FORMAT_Y800);
	CHROMA_TEST("Y8  ", VIDEO_FORMAT_Y800);
#undef CHROMA_CONV_FULL
#undef CHROMA_CONV
#undef CHROMA_TEST

	*(uint32_t*)chroma = *(uint32_t*)"BGRA";
	return VIDEO_FORMAT_BGRA;
}

static inline unsigned get_format_lines(enum video_format format,
		unsigned height, size_t plane)
{
	switch (format) {
	case VIDEO_FORMAT_I420:
	case VIDEO_FORMAT_NV12:
		return (plane == 0) ? height : height / 2;
	case VIDEO_FORMAT_YVYU:
	case VIDEO_FORMAT_YUY2:
	case VIDEO_FORMAT_UYVY:
	case VIDEO_FORMAT_I444:
	case VIDEO_FORMAT_RGBA:
	case VIDEO_FORMAT_BGRA:
	case VIDEO_FORMAT_BGRX:
	case VIDEO_FORMAT_Y800:
		return height;
	case VIDEO_FORMAT_NONE:;
	}

	return 0;
}

static enum audio_format convert_vlc_audio_format(char *format)
{
#define AUDIO_TEST(val, ret) \
	if (chroma_is(format, val)) return ret
#define AUDIO_CONV(val, new_val, ret) \
	do { \
		if (chroma_is(format, val)) { \
			*(uint32_t*)format = *(uint32_t*)new_val; \
			return ret; \
		} \
	} while (false)

	AUDIO_TEST("S16N", AUDIO_FORMAT_16BIT);
	AUDIO_TEST("S32N", AUDIO_FORMAT_32BIT);
	AUDIO_TEST("FL32", AUDIO_FORMAT_FLOAT);

	AUDIO_CONV("U16N", "S16N", AUDIO_FORMAT_16BIT);
	AUDIO_CONV("U32N", "S32N", AUDIO_FORMAT_32BIT);
	AUDIO_CONV("S24N", "S32N", AUDIO_FORMAT_32BIT);
	AUDIO_CONV("U24N", "S32N", AUDIO_FORMAT_32BIT);
	AUDIO_CONV("FL64", "FL32", AUDIO_FORMAT_FLOAT);

	AUDIO_CONV("S16I", "S16N", AUDIO_FORMAT_16BIT);
	AUDIO_CONV("U16I", "S16N", AUDIO_FORMAT_16BIT);
	AUDIO_CONV("S24I", "S32N", AUDIO_FORMAT_32BIT);
	AUDIO_CONV("U24I", "S32N", AUDIO_FORMAT_32BIT);
	AUDIO_CONV("S32I", "S32N", AUDIO_FORMAT_32BIT);
	AUDIO_CONV("U32I", "S32N", AUDIO_FORMAT_32BIT);
#undef AUDIO_CONV
#undef AUDIO_TEST

	*(uint32_t*)format = *(uint32_t*)"FL32";
	return AUDIO_FORMAT_FLOAT;
}

/* ------------------------------------------------------------------------- */

static const char *vlcs_get_name(void *unused)
{
	UNUSED_PARAMETER(unused);
	return obs_module_text("VLCSource");
}

static void vlcs_destroy(void *data)
{
	struct vlc_source *c = data;

	if (c->media_list_player) {
		libvlc_media_list_player_stop_(c->media_list_player);
		libvlc_media_list_player_release_(c->media_list_player);
	}
	if (c->media_player) {
		libvlc_media_player_release_(c->media_player);
	}

	bfree((void*)c->audio.data[0]);
	obs_source_frame_free(&c->frame);

	free_files(&c->files.da);
	pthread_mutex_destroy(&c->mutex);
	bfree(c);
}

static void *vlcs_video_lock(void *data, void **planes)
{
	struct vlc_source *c = data;
	for (size_t i = 0; i < MAX_AV_PLANES && c->frame.data[i] != NULL; i++)
		planes[i] = c->frame.data[i];
	return NULL;
}

static void vlcs_video_display(void *data, void *picture)
{
	struct vlc_source *c = data;
	c->frame.timestamp = (uint64_t)libvlc_clock_() * 1000ULL - time_start;
	obs_source_output_video(c->source, &c->frame);

	UNUSED_PARAMETER(picture);
}

static unsigned vlcs_video_format(void **p_data, char *chroma, unsigned *width,
		unsigned *height, unsigned *pitches, unsigned *lines)
{
	struct vlc_source *c = *p_data;
	enum video_format new_format;
	enum video_range_type range;
	bool new_range;
	size_t i = 0;

	new_format = convert_vlc_video_format(chroma, &new_range);

	libvlc_video_get_size_(c->media_player, 0, width, height);

	/* don't allocate a new frame if format/width/height hasn't changed */
	if (c->frame.format != new_format ||
	    c->frame.width  != *width     ||
	    c->frame.height != *height) {
		obs_source_frame_free(&c->frame);
		obs_source_frame_init(&c->frame, new_format, *width, *height);

		c->frame.format = new_format;
		c->frame.full_range = new_range;
		range = c->frame.full_range ?
			VIDEO_RANGE_FULL : VIDEO_RANGE_PARTIAL;
		video_format_get_parameters(VIDEO_CS_DEFAULT, range,
				c->frame.color_matrix,
				c->frame.color_range_min,
				c->frame.color_range_max);
	}

	while (c->frame.data[i]) {
		pitches[i] = (unsigned)c->frame.linesize[i];
		lines[i] = get_format_lines(c->frame.format, *height, i);
		i++;
	}

	return 1;
}

static void vlcs_audio_play(void *data, const void *samples, unsigned count,
		int64_t pts)
{
	struct vlc_source *c = data;
	size_t size = get_audio_size(c->audio.format, c->audio.speakers, count);

	if (c->audio_capacity < count) {
		c->audio.data[0] = brealloc((void*)c->audio.data[0], size);
		c->audio_capacity = count;
	}

	memcpy((void*)c->audio.data[0], samples, size);
	c->audio.timestamp = (uint64_t)pts * 1000ULL - time_start;
	c->audio.frames = count;

	obs_source_output_audio(c->source, &c->audio);
}

static int vlcs_audio_setup(void **p_data, char *format, unsigned *rate,
		unsigned *channels)
{
	struct vlc_source *c = *p_data;
	enum audio_format new_audio_format;

	new_audio_format = convert_vlc_audio_format(format);
	if (*channels > 2)
		*channels = 2;

	/* don't free audio data if the data is the same format */
	if (c->audio.format == new_audio_format &&
	    c->audio.samples_per_sec == *rate &&
	    c->audio.speakers == (enum speaker_layout)*channels)
		return 0;

	c->audio_capacity = 0;
	bfree((void*)c->audio.data[0]);

	memset(&c->audio, 0, sizeof(c->audio));
	c->audio.speakers = (enum speaker_layout)*channels;
	c->audio.samples_per_sec = *rate;
	c->audio.format = new_audio_format;
	return 0;
}

static void add_file(struct vlc_source *c, struct darray *array,
		const char *path)
{
	DARRAY(struct media_file_data) new_files;
	struct media_file_data data;
	struct dstr new_path = {0};
	libvlc_media_t *new_media;

	new_files.da = *array;

	dstr_copy(&new_path, path);
#ifdef _WIN32
	dstr_replace(&new_path, "/", "\\");
#endif
	path = new_path.array;

	new_media = get_media(&c->files.da, path);

	if (!new_media)
		new_media = get_media(&new_files.da, path);
	if (!new_media)
		new_media = create_media_from_file(path);

	if (new_media) {
		data.path = new_path.array;
		data.media = new_media;
		da_push_back(new_files, &data);
	} else {
		dstr_free(&new_path);
	}

	*array = new_files.da;
}

static bool valid_extension(const char *ext)
{
	struct dstr test = {0};
	bool valid = false;
	const char *b;
	const char *e;

	if (!ext || !*ext)
		return false;

	b = EXTENSIONS_MEDIA + 1;
	e = strchr(b, ';');

	for (;;) {
		if (e) dstr_ncopy(&test, b, e - b);
		else   dstr_copy(&test, b);

		if (dstr_cmp(&test, ext) == 0) {
			valid = true;
			break;
		}

		if (!e)
			break;

		b = e + 2;
		e = strchr(b, ';');
	}

	dstr_free(&test);
	return valid;
}

static void vlcs_update(void *data, obs_data_t *settings)
{
	DARRAY(struct media_file_data) new_files;
	DARRAY(struct media_file_data) old_files;
	libvlc_media_list_t *media_list;
	struct vlc_source *c = data;
	obs_data_array_t *array;
	const char *behavior;
	size_t count;

	da_init(new_files);
	da_init(old_files);

	array = obs_data_get_array(settings, S_PLAYLIST);
	count = obs_data_array_count(array);

	c->loop = obs_data_get_bool(settings, S_LOOP);

	behavior = obs_data_get_string(settings, S_BEHAVIOR);

	if (astrcmpi(behavior, S_BEHAVIOR_PAUSE_UNPAUSE) == 0) {
		c->behavior = BEHAVIOR_PAUSE_UNPAUSE;
	} else if (astrcmpi(behavior, S_BEHAVIOR_ALWAYS_PLAY) == 0) {
		c->behavior = BEHAVIOR_ALWAYS_PLAY;
	} else { /* S_BEHAVIOR_STOP_RESTART */
		c->behavior = BEHAVIOR_STOP_RESTART;
	}

	/* ------------------------------------- */
	/* create new list of sources */

	for (size_t i = 0; i < count; i++) {
		obs_data_t *item = obs_data_array_item(array, i);
		const char *path = obs_data_get_string(item, "value");
		os_dir_t *dir = os_opendir(path);

		if (dir) {
			struct dstr dir_path = {0};
			struct os_dirent *ent;

			for (;;) {
				const char *ext;

				ent = os_readdir(dir);
				if (!ent)
					break;
				if (ent->directory)
					continue;

				ext = os_get_path_extension(ent->d_name);
				if (!valid_extension(ext))
					continue;

				dstr_copy(&dir_path, path);
				dstr_cat_ch(&dir_path, '/');
				dstr_cat(&dir_path, ent->d_name);
				add_file(c, &new_files.da, dir_path.array);
			}

			dstr_free(&dir_path);
			os_closedir(dir);
		} else {
			add_file(c, &new_files.da, path);
		}

		obs_data_release(item);
	}

	/* ------------------------------------- */
	/* update settings data */

	libvlc_media_list_player_stop_(c->media_list_player);

	pthread_mutex_lock(&c->mutex);
	old_files.da = c->files.da;
	c->files.da = new_files.da;
	pthread_mutex_unlock(&c->mutex);

	/* ------------------------------------- */
	/* clean up and restart playback */

	free_files(&old_files.da);

	media_list = libvlc_media_list_new_(libvlc);

	libvlc_media_list_lock_(media_list);
	for (size_t i = 0; i < c->files.num; i++)
		libvlc_media_list_add_media_(media_list,
				c->files.array[i].media);
	libvlc_media_list_unlock_(media_list);

	libvlc_media_list_player_set_media_list_(c->media_list_player,
			media_list);
	libvlc_media_list_release_(media_list);

	libvlc_media_list_player_set_playback_mode_(c->media_list_player,
			c->loop ? libvlc_playback_mode_loop :
			          libvlc_playback_mode_default);

	if (c->files.num &&
	    (c->behavior == BEHAVIOR_ALWAYS_PLAY || obs_source_active(c->source)))
		libvlc_media_list_player_play_(c->media_list_player);
	else
		obs_source_output_video(c->source, NULL);

	obs_data_array_release(array);
}

static void vlcs_stopped(const struct libvlc_event_t *event, void *data)
{
	struct vlc_source *c = data;
	if (!c->loop)
		obs_source_output_video(c->source, NULL);

	UNUSED_PARAMETER(event);
}

static void *vlcs_create(obs_data_t *settings, obs_source_t *source)
{
	struct vlc_source *c = bzalloc(sizeof(*c));
	c->source = source;

	pthread_mutex_init_value(&c->mutex);
	if (pthread_mutex_init(&c->mutex, NULL) != 0)
		goto error;

	if (!load_libvlc())
		goto error;

	c->media_list_player = libvlc_media_list_player_new_(libvlc);
	if (!c->media_list_player)
		goto error;

	c->media_player = libvlc_media_player_new_(libvlc);
	if (!c->media_player)
		goto error;

	libvlc_media_list_player_set_media_player_(c->media_list_player,
			c->media_player);

	libvlc_video_set_callbacks_(c->media_player,
			vlcs_video_lock, NULL, vlcs_video_display,
			c);
	libvlc_video_set_format_callbacks_(c->media_player,
			vlcs_video_format, NULL);

	libvlc_audio_set_callbacks_(c->media_player,
			vlcs_audio_play, NULL, NULL, NULL, NULL, c);
	libvlc_audio_set_format_callbacks_(c->media_player,
			vlcs_audio_setup, NULL);

	libvlc_event_manager_t *event_manager;
	event_manager = libvlc_media_player_event_manager_(c->media_player);
	libvlc_event_attach_(event_manager, libvlc_MediaPlayerEndReached,
			vlcs_stopped, c);

	obs_source_update(source, NULL);

	UNUSED_PARAMETER(settings);
	return c;

error:
	vlcs_destroy(c);
	return NULL;
}

static void vlcs_activate(void *data)
{
	struct vlc_source *c = data;

	if (c->behavior == BEHAVIOR_STOP_RESTART) {
		libvlc_media_list_player_play_(c->media_list_player);

	} else if (c->behavior == BEHAVIOR_PAUSE_UNPAUSE) {
		libvlc_media_list_player_play_(c->media_list_player);
	}
}

static void vlcs_deactivate(void *data)
{
	struct vlc_source *c = data;

	if (c->behavior == BEHAVIOR_STOP_RESTART) {
		libvlc_media_list_player_stop_(c->media_list_player);
		obs_source_output_video(c->source, NULL);

	} else if (c->behavior == BEHAVIOR_PAUSE_UNPAUSE) {
		libvlc_media_list_player_pause_(c->media_list_player);
	}
}

static void vlcs_defaults(obs_data_t *settings)
{
	obs_data_set_default_bool(settings, S_LOOP, true);
	obs_data_set_default_string(settings, S_BEHAVIOR,
			S_BEHAVIOR_STOP_RESTART);
}

static obs_properties_t *vlcs_properties(void *data)
{
	obs_properties_t *ppts = obs_properties_create();
	struct vlc_source *c = data;
	struct dstr filter = {0};
	struct dstr exts = {0};
	struct dstr path = {0};
	obs_property_t *p;

	obs_properties_add_bool(ppts, S_LOOP, T_LOOP);

	if (c) {
		pthread_mutex_lock(&c->mutex);
		if (c->files.num) {
			struct media_file_data *last = da_end(c->files);
			const char *slash;

			dstr_copy(&path, last->path);
			dstr_replace(&path, "\\", "/");
			slash = strrchr(path.array, '/');
			if (slash)
				dstr_resize(&path, slash - path.array + 1);
		}
		pthread_mutex_unlock(&c->mutex);
	}

	p = obs_properties_add_list(ppts, S_BEHAVIOR, T_BEHAVIOR,
			OBS_COMBO_TYPE_LIST, OBS_COMBO_FORMAT_STRING);
	obs_property_list_add_string(p, T_BEHAVIOR_STOP_RESTART,
			S_BEHAVIOR_STOP_RESTART);
	obs_property_list_add_string(p, T_BEHAVIOR_PAUSE_UNPAUSE,
			S_BEHAVIOR_PAUSE_UNPAUSE);
	obs_property_list_add_string(p, T_BEHAVIOR_ALWAYS_PLAY,
			S_BEHAVIOR_ALWAYS_PLAY);

	dstr_cat(&filter, "Media Files (");
	dstr_copy(&exts, EXTENSIONS_MEDIA);
	dstr_replace(&exts, ";", " ");
	dstr_cat_dstr(&filter, &exts);

	dstr_cat(&filter, ");;Video Files (");
	dstr_copy(&exts, EXTENSIONS_VIDEO);
	dstr_replace(&exts, ";", " ");
	dstr_cat_dstr(&filter, &exts);

	dstr_cat(&filter, ");;Audio Files (");
	dstr_copy(&exts, EXTENSIONS_AUDIO);
	dstr_replace(&exts, ";", " ");
	dstr_cat_dstr(&filter, &exts);

	dstr_cat(&filter, ");;Playlist Files (");
	dstr_copy(&exts, EXTENSIONS_PLAYLIST);
	dstr_replace(&exts, ";", " ");
	dstr_cat_dstr(&filter, &exts);
	dstr_cat(&filter, ")");

	obs_properties_add_editable_list(ppts, S_PLAYLIST, T_PLAYLIST,
			OBS_EDITABLE_LIST_TYPE_FILES, filter.array, path.array);
	dstr_free(&path);
	dstr_free(&filter);
	dstr_free(&exts);

	return ppts;
}

struct obs_source_info vlc_source_info = {
	.id = "vlc_source",
	.type = OBS_SOURCE_TYPE_INPUT,
	.output_flags = OBS_SOURCE_ASYNC_VIDEO | OBS_SOURCE_AUDIO,
	.get_name = vlcs_get_name,
	.create = vlcs_create,
	.destroy = vlcs_destroy,
	.update = vlcs_update,
	.get_defaults = vlcs_defaults,
	.get_properties = vlcs_properties,
	.activate = vlcs_activate,
	.deactivate = vlcs_deactivate
};