pvr.h

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/*
 *  Copyright (C) 2006 Benjamin Zores
 *  Copyright (C) 2007 Sven Gothel (Channel Navigation)
 *   Stream layer for hardware MPEG 1/2/4 encoders a.k.a PVR
 *    (such as WinTV PVR-150/250/350/500 (a.k.a IVTV), pvrusb2 and cx88).
 *   See http://ivtvdriver.org/index.php/Main_Page for more details on the
 *    cards supported by the ivtv driver.
 *
 *   This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *   This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *   You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software Foundation,
 *  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

#ifndef PVR_H
#define PVR_H

#include "tv.h"

/**
 * @brief Get the current station name.
 *        The pointer is valid, till the stream is closed.
 * @return The stream's station name
 */
const char *pvr_get_current_stationname (stream_t *stream);

/**
 * @brief Get the current channel name.
 *        The pointer is valid, till the stream is closed.
 * @return The stream's channel name 
 */
const char *pvr_get_current_channelname (stream_t *stream);

/**
 * @brief Get the current frequency.
 * @return frequency
 */
int pvr_get_current_frequency (stream_t *stream);

/**
 * @brief Set the current station using the channel name.
 *        This function will fail,
 *        if the channel does not exist, or the station is not enabled
 * @return 0 if the station is available, otherwise -1
 */
int pvr_set_channel (stream_t *stream, const char *channel);

/**
 * @brief Set the current station using to the last set channel
 * @return 0 if the station is available, otherwise -1
 */
int pvr_set_lastchannel (stream_t *stream);

/**
 * @brief Set the current channel using the frequency.
 *        This function will fail,
 *        if the frequency does not exist, or the station is not enabled
 * @return 0 if the station is available, otherwise -1
 */
int pvr_set_freq (stream_t *stream, int freq);

/**
 * @brief Set the current station while stepping.
 *        This function will fail,
 *        if the station does not exist, or the station is not enabled
 * @return 0 if the station is available, otherwise -1
 */
int pvr_set_channel_step (stream_t *stream, int step);

/**
 * @brief Set the current frequency while stepping
 *        This function will fail,
 *        if the frequency is invalid, i.e. <0
 * @return 0 if success, otherwise -1
 */
int pvr_force_freq_step (stream_t *stream, int step);

#endif /* PVR_H */