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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 */
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