path: root/src/tv.c

/*
 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
 *
 * Licensed under the Apache License, Version 2.0 (the License);
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an AS IS BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <stdio.h>
#include <app.h>
#include <iconv.h>
#include <math.h>
#include <app_debug.h>
#include <app_contents.h>

#include <tv_service_proxy.h>
#include <tv_service_proxy_epg.h>

#include <glib.h>
#include <glib-object.h>

#include "define.h"
#include "tv.h"

#define DEFAULT_SERVICE 1

struct _channel_history {
	int service_id[2];
	unsigned int idx;
};

/**
 * The Storage structure to used by tv related functions and events.
 */
struct _tv_info {
	/**< The handle to use tv service live api. */
	TvServiceLive live_svc;
	/**< The handle to use tv service epg api. */
	TvServiceEpg epg_svc;

	/**< Stores service id if tune to locked channel was succeeded. */
	int viewing_locked_channel;
	/**< Stores previous service id. */
	struct _channel_history history;

	/**< The function pointer to pass tv signal event */
	void (*signal_cb)(void *data, int is_signal);
	/**< An Additional data to passed to tv signal event */
	void *signal_cb_data;
};

static struct _tv_info g_tv_info;

/**
 * Gets the tv_channel_info with supplied TvServiceChannel.
 *
 * Abstracts tv service data structure.
 *
 * @param channel The channel data defined by tv service
 * @return Channel information, or NULL if fails
 */
static struct tv_channel_info *_tv_channel_get_info(TvServiceChannel *channel)
{
	struct tv_channel_info *channel_info = NULL;

	if (!channel) {
		_ERR("failed to get channel");
		return NULL;
	}

	channel_info = calloc(1, sizeof(*channel_info));
	if (!channel_info) {
		_ERR("failed to calloc channel info");
		return NULL;
	}

	channel_info->service_id = channel->service_id;
	channel_info->channel_major = channel->major;
	channel_info->channel_minor = channel->minor;
	channel_info->channel_type = channel->channel_type;
	channel_info->locked = channel->locked;
	channel_info->digital = channel->digital;
	channel_info->favorite = channel->favorite;
	channel_info->remembered = channel->remembered;
	strncpy(channel_info->channel_name, channel->program_name,
		CHANNEL_NAME_MAX);

	if (channel->service_id == g_tv_info.viewing_locked_channel)
		channel_info->tune_locked = EINA_TRUE;

	return channel_info;
}

/**
 * Clones the tv_channel_info.
 *
 * @param channel_info tv_channel_info pointer to be cloned
 * @return Channel information, or NULL if fails
 */
const struct tv_channel_info *tv_channel_clone_info(
		const struct tv_channel_info *channel_info)
{
	struct tv_channel_info *new_channel_info = NULL;

	if (!channel_info) {
		_ERR("failed to get channel info");
		return NULL;
	}

	new_channel_info = calloc(1, sizeof(*channel_info));
	if (!new_channel_info) {
		_ERR("failed to calloc channel info");
		return NULL;
	}

	memcpy(new_channel_info, channel_info, sizeof(*new_channel_info));

	return new_channel_info;
}

/**
 * Frees the tv_channel_info.
 *
 * @param channel_info tv_channel_info pointer to be freed
 */
void tv_channel_del_info(const struct tv_channel_info *channel_info)
{
	if (!channel_info) {
		_ERR("failed to get channel info");
		return;
	}

	free((void *)channel_info);
}

/**
 * Gets current channel's TvServiceChannel data from tv service.
 *
 * @param channel The pointer to store TvServiceChannel
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
static int _tv_get_channel(TvServiceChannel *channel)
{
	gint svc_id;
	int r;

	if (!g_tv_info.live_svc) {
		_ERR("failed to get live service");
		return -1;
	}

	r = tv_service_live_get_service_id(g_tv_info.live_svc, &svc_id);
	if (r < 0) {
		_ERR("failed to get service id");
		return -1;
	}

	r = tv_service_get_channel(svc_id, channel);
	if (r < 0) {
		_ERR("failed to get channel");
		return -1;
	}

	return 0;
}

/**
 * Returns current channel's info.
 *
 * tv_channel_get_info retrieves current channel's information
 * from tv service.
 *
 * @return Returns current channel info, or NULL if fails
 */
const struct tv_channel_info *tv_channel_get_info(void)
{
	const struct tv_channel_info *channel_info;
	TvServiceChannel channel;
	int r;

	r = _tv_get_channel(&channel);
	if (r < 0) {
		_ERR("failed to get channel");
		return NULL;
	}

	channel_info = _tv_channel_get_info(&channel);

	return channel_info;
}

/**
 * Returns tv_program_info with supplied TvServiceEpgEventData.
 *
 * Abstracts tv service data structure.
 *
 * @param prog TvServiceEpgEventData passed from tv service
 * @return Returns tv_program_info, or NULL if fails
 */
static struct tv_program_info *_tv_get_program_info(TvServiceEpgEventData *prog)
{
	struct tv_program_info *prog_info;

	prog_info = calloc(1, sizeof(*prog_info));
	if (!prog_info) {
		_ERR("failed to calloc program info");
		return NULL;
	}

	prog_info->service_id = prog->service_id;
	prog_info->start_time = prog->start_time;
	prog_info->end_time = prog->start_time + prog->length_in_seconds;
	prog_info->duration = prog->length_in_seconds;
	prog_info->current_time = prog->current_time;
	strncpy(prog_info->prog_title, (char *)prog->title_text,
			sizeof(prog_info->prog_title) - 1);
	strncpy(prog_info->prog_description, (char *)prog->extended_text,
			sizeof(prog_info->prog_description) - 1);

	return prog_info;
}

/**
 * Gets current channel's service id from tv service.
 *
 * @param service_id The pointer to store service id
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_get_current_service_id(int *service_id)
{
	int r;

	if (!g_tv_info.live_svc) {
		_ERR("failed to get live service");
		return -1;
	}

	r = tv_service_live_get_service_id(g_tv_info.live_svc, service_id);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to get current service info");
		return -1;
	}

	return 0;
}

/**
 * Frees epg list.
 *
 * @param epg_list Eina_List to be freed
 */
static void _tv_epg_del_list(Eina_List *epg_list)
{
	struct tv_program_info *data;

	EINA_LIST_FREE(epg_list, data)
		free(data);
}

/**
 * Callback function to get EPG program list from tv service.
 *
 * _tv_epg_event_cb is called from tv service when banner
 * have requested to get program data.
 * If this function is called, then derives program list from epg_list
 * and calls banner's callback function which included in user_data.
 *
 * @param type Event type
 * @param epg_list EPG program list
 * @param user_data tv_program_request to handle request
 */
static void _tv_epg_event_cb(tvs_epg_event_e type, GList *epg_list,
		void *user_data)
{
	int i;
	Eina_List *list = NULL;
	TvServiceEpgEventData *epg_data;
	struct tv_program_info *prog_info;
	struct tv_program_request *request;

	if (!user_data) {
		_ERR("failed to get user_data");
		return;
	}

	for (i = 0; i < g_list_length(epg_list); i++) {
		epg_data = (TvServiceEpgEventData *)
				g_list_nth_data(epg_list, i);

		if (!epg_data)
			continue;

		prog_info = _tv_get_program_info(epg_data);
		if (prog_info)
			list = eina_list_append(list, prog_info);
	}

	request = (struct tv_program_request *) user_data;
	if (request->tv_program_cb)
		request->tv_program_cb(list, request->user_data);

	if (list)
		_tv_epg_del_list(list);

	free(request);
}

/**
 * Send a request to tv service to get a current program with supplied service_id.
 *
 * Beware that service_id should be current tuned channel.
 * If not, calling this function may cause unexpected behavior.
 * And note that get a EPG program is asynchronous operation.
 * So tv_program_request should be supplied to get a result from tv service.
 *
 * @param service_id The channel id to get current program
 * @param request The structure for return program data which contains function pointer
 *        and additional data for banner
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_epg_get_program(int service_id, struct tv_program_request *request)
{
	int r;

	if (!g_tv_info.epg_svc) {
		_ERR("failed to get epg service");
		return -1;
	}

	if (!request) {
		_ERR("failed to get tv_program_request");
		return -1;
	}

	r = tv_service_epg_get_current_program(g_tv_info.epg_svc, service_id,
			(TvServiceEpgCallback) _tv_epg_event_cb, request);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to get epg get current program : %d", service_id);
		free(request);
		return -1;
	}

	return 0;
}

/**
 * Gets a cached current program with supplied service_id from tv service.
 *
 * Note that this function is vaild only when tv service having a cached data
 * on that channel.
 * To have a cached data, the channel ever been tuned before calling
 * this function.
 *
 * @param service_id The channel id to get current program
 * @param request The structure for return program data which contains
 *        function pointer and additional data for banner
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_epg_get_cache_program(int service_id, struct tv_program_request *request)
{
	Eina_List *list = NULL;
	TvServiceEpgEventData epg_data;
	struct tv_program_info *prog_info;

	int r;

	if (!g_tv_info.epg_svc) {
		_ERR("failed to get epg service");
		return -1;
	}

	if (!request) {
		_ERR("failed to get tv_program_request");
		return -1;
	}

	r = tv_service_epg_get_cache_current_program(
			g_tv_info.epg_svc, service_id, &epg_data);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to get epg get cached current program : %d",
				service_id);
		return -1;
	}

	prog_info = _tv_get_program_info(&epg_data);
	if (prog_info)
		list = eina_list_append(list, prog_info);

	if (request->tv_program_cb)
		request->tv_program_cb(list, request->user_data);

	if (list)
		_tv_epg_del_list(list);

	free(request);

	return 0;
}

/**
 * Sends a request to tv service to get programs with supplied service_id.
 *
 * Beware that service_id should be current tuned channel.
 * If not, calling this function may cause unexpected behavior.
 * And note that get a EPG program is asynchronous operation.
 * So tv_program_request should be supplied to get a result from tv service.
 *
 * @param service_id The channel id to get current program
 * @param request The structure for return program data which contains function pointer and additional data for banner
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_epg_get_program_list(int service_id,
		struct tv_program_request *request)
{
	int r;

	if (!g_tv_info.epg_svc) {
		_ERR("failed to get epg service");
		return -1;
	}

	if (!request) {
		_ERR("failed to get tv_program_request");
		return -1;
	}

	r = tv_service_epg_get_program_list(g_tv_info.epg_svc, service_id,
			TVS_EPG_CURRENT_TIME, EPG_PROGRAM_OFFSET,
			(TvServiceEpgCallback) _tv_epg_event_cb, request);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to get epg get current program");
		return -1;
	}

	return 0;
}

/**
 * Frees the TvServiceFilterNode.
 *
 * @param data TvServiceFilterNode pointer to be freed
 */
static void _tv_channel_free_filter(gpointer data)
{
	TvServiceFilterNode *filter_node;

	if (!data)
		return;

	filter_node = (TvServiceFilterNode *) data;

	g_value_unset(filter_node->value);
	g_free(filter_node->value);
	g_free(filter_node);
}

/**
 * Gets a available channel list.
 *
 * Note that deleted channels and service channels are excluded by default.
 *
 * @return Available channel list, or NULL if fails
 */
Eina_List *tv_channel_get_list()
{
	GList *tvs_list = NULL;
	Eina_List *channel_list = NULL;
	TvServiceChannel *tvs_data = NULL;
	const struct tv_channel_info *channel_info;
	int r, i;

	r = tv_service_get_channel_list(
			TV_SERVICE_CHANNEL_MODE_DIGITAL_ANALOG,
			TV_SERVICE_ANTENNA_TYPE_ALL, &tvs_list);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to get channel list");
		return NULL;
	}

	for (i = 0; i < g_list_length(tvs_list); i++) {
		tvs_data = (TvServiceChannel *) g_list_nth_data(tvs_list, i);
		if (tvs_data) {
			channel_info = _tv_channel_get_info(tvs_data);
			if (channel_info)
				channel_list = eina_list_append(channel_list,
						channel_info);
		}
	}

	tv_service_free_channel_list(tvs_list);

	return channel_list;
}

/**
 * Gets a favorite channel list.
 *
 * @return Favorite channel list, or NULL if fails
 */
Eina_List *tv_channel_get_favorite_list()
{
	GList *tvs_list = NULL;
	Eina_List *channel_list = NULL;
	TvServiceChannel *tvs_data = NULL;
	const struct tv_channel_info *channel_info;
	int r, i;

	r = tv_service_get_channel_list(
			TV_SERVICE_CHANNEL_MODE_FAVORITE,
			TV_SERVICE_ANTENNA_TYPE_ALL, &tvs_list);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to get channel list");
		return NULL;
	}

	for (i = 0; i < g_list_length(tvs_list); i++) {
		tvs_data = (TvServiceChannel *) g_list_nth_data(tvs_list, i);
		if (tvs_data) {
			channel_info = _tv_channel_get_info(tvs_data);
			if (channel_info)
				channel_list = eina_list_append(channel_list,
						channel_info);
		}
	}

	tv_service_free_channel_list(tvs_list);

	return channel_list;
}

TvServiceFilterNode *_tv_channel_get_filter(
		TvServiceChannelDataAttr attribute, int type, void *data)
{
	TvServiceFilterNode *filter;
	GValue *value;

	filter = g_malloc0(sizeof(*filter));
	if (!filter)
		return NULL;

	filter->attribute = attribute;

	value = g_malloc0(sizeof(GValue));
	if (!value) {
		g_free(filter);
		return NULL;
	}

	switch (type) {
	case G_TYPE_STRING:
		g_value_init(value, G_TYPE_STRING);
		g_value_set_string(value, data);

		filter->match_type = CHANNEL_FILTER_MATCH_CONTAIN;
		break;
	case G_TYPE_INT:
		g_value_init(value, G_TYPE_INT);
		g_value_set_int(value, (gint) data);

		filter->match_type = CHANNEL_FILTER_MATCH_EQUAL;
		break;
	}
	filter->value = value;

	return filter;
}

/**
 * Search channels that are starts with supplied major and minor number.
 *
 * Note that deleted channels and service channels are excluded by default.
 *
 * @param major Major channel number to search
 * @param minor Minor channel number to search
 * @return Found channel list, or NULL if fails
 */
Eina_List *tv_channel_search_by_number(long major, long minor)
{
	char buf[CHANNEL_FILTER_STRING_MAX_LEN];
	GList *tvs_list = NULL, *filter = NULL;
	TvServiceFilterNode *filter_node;
	TvServiceChannel *tvs_data;
	Eina_List *channel_list = NULL;
	const struct tv_channel_info *channel_info;
	int i, r;

	if (major > 0 && major < MAJOR_MAX) {
		snprintf(buf, CHANNEL_FILTER_STRING_MAX_LEN, "%ld", major);

		filter_node = _tv_channel_get_filter(
				TV_SERVICE_CHANNEL_DATA_MAJOR_NUMBER,
				G_TYPE_STRING, buf);
		if (filter_node)
			filter = g_list_append(filter, (gpointer)filter_node);
	}

	if (minor > 0 && minor < MINOR_MAX) {
		snprintf(buf, CHANNEL_FILTER_STRING_MAX_LEN, "%ld", minor);

		filter_node = _tv_channel_get_filter(
				TV_SERVICE_CHANNEL_DATA_MINOR_NUMBER,
				G_TYPE_STRING, buf);
		if (filter_node)
			filter = g_list_append(filter, (gpointer)filter_node);
	}

	if (!filter) {
		_ERR("failed to get filter");
		return NULL;
	}

	r = tv_service_get_channel_list_ex(
			TV_SERVICE_CHANNEL_MODE_ALL_DIGITAL_ANALOG,
			TV_SERVICE_ANTENNA_TYPE_ALL, &tvs_list, filter, 0);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to get channel list");
		goto free;
	}

	for (i = 0; i < g_list_length(tvs_list); i++) {
		tvs_data = (TvServiceChannel *) g_list_nth_data(tvs_list, i);
		if (!tvs_data)
			continue;

		channel_info = _tv_channel_get_info(tvs_data);
		if (channel_info)
			channel_list = eina_list_append(channel_list,
					channel_info);
	}

free:
	tv_service_free_channel_list(tvs_list);

	g_list_foreach(filter, (GFunc) _tv_channel_free_filter, NULL);
	g_list_free(filter);

	return channel_list;
}

/**
 * Frees the tv_channel_info.
 *
 * @param channel_list channel_list pointer to be freed
 */
void tv_channel_del_list(Eina_List *channel_list)
{
	struct tv_channel_info *data;

	EINA_LIST_FREE(channel_list, data)
		free(data);
}

static void _tv_channel_add_history(int service_id)
{
	char buf[128];

	g_tv_info.history.service_id[g_tv_info.history.idx++ % 2]
			= service_id;

	snprintf(buf, sizeof(buf), "%d", service_id);
	app_contents_recent_add(CONTENTS_CHANNEL, buf);
}

static int _tv_channel_get_history(void)
{
	int service_id;

	service_id = g_tv_info.history.service_id[g_tv_info.history.idx % 2];

	return service_id;
}

/**
 * Tunes to specific channel with service id.
 *
 * @param service_id The channel id
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_tune_with_service_id(int service_id)
{
	int r;

	if (!g_tv_info.live_svc) {
		_ERR("failed to get live service");
		return -1;
	}

	r = tv_service_live_tune(g_tv_info.live_svc, service_id);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to set service");
		return -1;
	}

	_tv_channel_add_history(service_id);

	g_tv_info.viewing_locked_channel = -1;

	return 0;
}

/**
 * Tunes to last viewed channel.
 *
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_tune(void)
{
	int service_id;
	int r;

	if (!g_tv_info.live_svc) {
		_ERR("failed to get live service");
		return -1;
	}

	r = tv_service_live_get_last_channel(&service_id);
	if (r < 0 || service_id < 1) {
		_ERR("failed to get current service id");
		service_id = DEFAULT_SERVICE;
	}

	r = tv_service_live_tune(g_tv_info.live_svc, service_id);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to set service");
		return -1;
	}

	_tv_channel_add_history(service_id);

	g_tv_info.viewing_locked_channel = -1;

	return 0;
}

/**
 * Tunes to previously viewed channel.
 *
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_tune_prev_channel(void)
{
	int service_id;
	int r;

	if (!g_tv_info.live_svc) {
		_ERR("failed to get live service");
		return -1;
	}

	service_id = _tv_channel_get_history();
	if (service_id < 1) {
		_ERR("no previous channel");
		return -1;
	}

	r = tv_service_live_tune(g_tv_info.live_svc, service_id);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to set service");
		return -1;
	}

	_tv_channel_add_history(service_id);

	g_tv_info.viewing_locked_channel = -1;

	return 0;
}

/**
 * Tunes to specific channel with major and minor.
 *
 * @param service_id The channel id
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_direct_tune(long major, long minor)
{
	GList *tvs_list = NULL, *filter = NULL;
	TvServiceFilterNode *filter_node;
	TvServiceChannel *tvs_data;
	int r;

	if (!g_tv_info.live_svc) {
		_ERR("failed to get live service");
		return -1;
	}

	if (major > 0 && major < MAJOR_MAX) {
		filter_node = _tv_channel_get_filter(
				TV_SERVICE_CHANNEL_DATA_MAJOR_NUMBER,
				G_TYPE_INT, (void *) major);
		if (filter_node)
			filter = g_list_append(filter, (gpointer)filter_node);
	}

	if (minor > 0 && minor < MINOR_MAX) {
		filter_node = _tv_channel_get_filter(
				TV_SERVICE_CHANNEL_DATA_MINOR_NUMBER,
				G_TYPE_INT, (void *) minor);
		if (filter_node)
			filter = g_list_append(filter, (gpointer)filter_node);
	}

	if (!filter) {
		_ERR("failed to get filter");
		return -1;
	}

	r = tv_service_get_channel_list_ex(
			TV_SERVICE_CHANNEL_MODE_ALL_DIGITAL_ANALOG,
			TV_SERVICE_ANTENNA_TYPE_ALL, &tvs_list, filter, 0);
	if (r != TVS_ERROR_OK)
		goto free;

	tvs_data = (TvServiceChannel *) g_list_nth_data(tvs_list, 0);
	if (tvs_data)
		r = tv_channel_tune_with_service_id(tvs_data->service_id);
	else {
		_ERR("failed to get tvs_data");
		r = -1;
	}

	if (r == TVS_ERROR_OK)
		g_tv_info.viewing_locked_channel = -1;

	tv_service_free_channel_list(tvs_list);

free:
	g_list_foreach(filter, (GFunc) _tv_channel_free_filter, NULL);
	g_list_free(filter);

	return r;
}

/**
 * Tunes to locked channel.
 *
 * @param service_id The channel id
 * @param password 4 digit password
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_tune_locked_channel(int service_id, char *password)
{
	int r;

	if (!g_tv_info.live_svc) {
		_ERR("failed to get live service");
		return -1;
	}

	r = tv_service_live_tune_locked_channel(g_tv_info.live_svc,
			service_id, password);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to set service");
		return -1;
	}

	_tv_channel_add_history(service_id);

	g_tv_info.viewing_locked_channel = service_id;

	return 0;
}

/**
 * Sets the channel's favorite status.
 *
 * @param service_id The channel id
 * @param flag The value to be set
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_set_favorite(int service_id, Eina_Bool flag)
{
	int r;

	if (flag) {
		r = tv_service_add_favorite_channel(service_id);
		if (r < 0) {
			_ERR("failed to add favorite channel");
			return -1;
		}
	} else {
		r = tv_service_delete_favorite_channel(service_id);
		if (r < 0) {
			_ERR("failed to delete favorite channel");
			return -1;
		}
	}

	return 0;
}

/**
 * Adds the channel.
 *
 * If channel is added, the channel will be included at
 * tv_channel_next, tv_channel_prev and tv_channel_get_list.
 *
 * @param service_id The channel id
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_add_channel(int service_id)
{
	int r;

	r = tv_service_add_channel(service_id);
	if (r < 0) {
		_ERR("failed to add channel");
		return -1;
	}

	return 0;
}

/**
 * Deletes the channel.
 *
 * If channel is deleted, the channel will be omitted at
 * tv_channel_next, tv_channel_prev and tv_channel_get_list.
 *
 * @param service_id The channel id
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_del_channel(int service_id)
{
	int r;

	r = tv_service_delete_channel(service_id);
	if (r < 0) {
		_ERR("failed to delete channel");
		return -1;
	}

	return 0;
}

/**
 * Locks the channel.
 *
 * @param service_id The channel id
 * @param password 4 digits password
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_lock_channel(int service_id, char *password)
{
	int r;

	r = tv_service_lock_channel(service_id, password);
	if (r < 0) {
		_ERR("failed to lock channel");
		return -1;
	}

	return 0;
}

/**
 * Unlocks the channel.
 *
 * @param service_id The channel id
 * @param password 4 digits password
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_channel_unlock_channel(int service_id, char *password)
{
	int r;

	r = tv_service_unlock_channel(service_id, password);
	if (r < 0) {
		_ERR("failed to unlock channel");
		return -1;
	}

	return 0;
}

/**
 * Callback function for receives tv service events.
 *
 * @param event Event type
 * @param user_data Not in use
 * @param data Event specific detailed data
 */
void _tv_service_event_cb(TvServiceLiveEvent event,
		gpointer user_data, const gpointer data)
{
	gboolean *lock_status;

	switch (event) {
	case TV_SERVICE_LIVE_EVENT_TUNER_LOCK:
		if (!data) {
			_ERR("failed to get data");
			break;
		}

		lock_status = (gboolean *) data;
		if (g_tv_info.signal_cb)
			g_tv_info.signal_cb(g_tv_info.signal_cb_data,
					*lock_status);
		break;
	case TV_SERVICE_LIVE_EVENT_AUTO_DESTROY:
		g_tv_info.live_svc = NULL;
		break;
	case TV_SERVICE_LIVE_EVENT_RESOLUTION:
	case TV_SERVICE_LIVE_EVENT_BEGIN:
	case TV_SERVICE_LIVE_EVENT_CHANNEL_LOCK:
	case TV_SERVICE_LIVE_EVENT_CHANNEL_UNLOCK:
		break;
	}
}

/**
 * Sets tv signal callback function.
 *
 * @param cb The function pointer to get callback
 * @param data An Additional data to passed to callback
 */
void tv_signal_cb_set(void (*cb)(void *data, int is_signal), void *data)
{
	g_tv_info.signal_cb = cb;
	g_tv_info.signal_cb_data = data;
}

/**
 * Destory the tv service handles.
 *
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_destroy(void)
{
	int r;

	if (g_tv_info.live_svc)
		g_tv_info.live_svc = NULL;

	r = tv_service_channel_info_destroy();
	if (r < 0)
		_ERR("failed to destroy channel info service");

	if (g_tv_info.epg_svc) {
		r = tv_service_epg_destroy(g_tv_info.epg_svc);
		if (r != 0)
			_ERR("failed to destroy epg service");
		g_tv_info.epg_svc = NULL;
	}

	return 0;
}

/**
 * Create the tv service handles.
 *
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_create(void)
{
	int r;

	r = tv_service_live_create(&g_tv_info.live_svc);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to create live service");
		goto err;
	}

	r = tv_service_live_register_callback(g_tv_info.live_svc,
			_tv_service_event_cb, NULL);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to register live callback");
		goto err;
	}

	r = tv_service_channel_info_create();
	if (r != TVS_ERROR_OK) {
		_ERR("failed to create channel info service");
		goto err;
	}

	r = tv_service_epg_create(&g_tv_info.epg_svc);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to create epg service");
		goto err;
	}

	memset(&g_tv_info.history, 0, sizeof(g_tv_info.history));

	return 0;
err:
	tv_destroy();
	return -1;
}

/**
 * Pause the tv service handles.
 *
 * @return If the operation was sucessful 0 is returned; otherwise negative value is returned
 */
int tv_pause(void)
{
	int r;

	if (g_tv_info.live_svc) {
		r = tv_service_live_tune_pause(g_tv_info.live_svc);
		if (r != TVS_ERROR_OK)
			_ERR("failed to pause live service");
	}

	return 0;
}

/**
 * Resume the tv service handles.
 *
 * Live service could be destroyed by tv service while app is pausing.
 * If live service is destroyed, then _tv_service_event_cb sets
 * g_tv_info.live_svc to NULL.
 * So if g_tv_info.live_svc is NULL, then recreates live service and returns 1.
 * Therefore, if tv_resume returns 1, then app needs to be set overlay and tune.
 * Or returns 0, then app just needs to set overlay.
 *
 * @return 0 if successful; 1 if live service was destroyed; otherwise negative value is returned
 */
int tv_resume(void)
{
	int r;

	if (!g_tv_info.live_svc) {
		r = tv_service_live_create(&g_tv_info.live_svc);
		if (r != TVS_ERROR_OK) {
			_ERR("failed to create live service");
			goto err;
		}

		r = tv_service_live_register_callback(g_tv_info.live_svc,
				_tv_service_event_cb, NULL);
		if (r != TVS_ERROR_OK) {
			_ERR("failed to register live callback");
			goto err;
		}

		return 1;
	}

	r = tv_service_live_tune_resume(g_tv_info.live_svc);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to create live service");
		goto err;
	}

	r = tv_service_live_register_callback(g_tv_info.live_svc,
			_tv_service_event_cb, NULL);
	if (r != TVS_ERROR_OK) {
		_ERR("failed to register live callback");
		goto err;
	}

	return 0;

err:
	tv_destroy();
	return -1;
}