zoneminder/src/zm_curl_camera.h

//
// ZoneMinder cURL Class Interface, $Date: 2008-07-25 10:33:23 +0100 (Fri, 25 Jul 2008) $, $Revision: 2611 $
// Copyright (C) 2001-2008 Philip Coombes
// 
// 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
// 

#ifndef ZM_CURL_CAMERA_H
#define ZM_CURL_CAMERA_H

#if HAVE_LIBCURL

#include "zm_camera.h"
#include "zm_ffmpeg.h"
#include "zm_buffer.h"
#include "zm_regexp.h"
#include "zm_utils.h"
#include "zm_signal.h"
#include <string>
#include <deque>

#if HAVE_CURL_CURL_H
#include <curl/curl.h>
#endif

//
// Class representing 'curl' cameras, i.e. those which are
// accessed using the curl library
//
class cURLCamera : public Camera
{
protected:
	typedef enum {MODE_UNSET, MODE_SINGLE, MODE_STREAM} mode_t;

	std::string mPath;
	std::string mUser;
	std::string mPass;

	/* cURL object(s) */
	CURL* c;

	/* Shared data */
	volatile bool bTerminate;
	volatile bool bReset;
	volatile mode_t mode;
	Buffer databuffer;
	std::deque<size_t> single_offsets;

	/* pthread objects */
	pthread_t thread;
	pthread_mutex_t shareddata_mutex;
	pthread_cond_t data_available_cond;
	pthread_cond_t request_complete_cond;

public:
	cURLCamera( int p_id, const std::string &path, const std::string &username, const std::string &password,  int p_width, int p_height, int p_colours, int p_brightness, int p_contrast, int p_hue, int p_colour, bool p_capture );
	~cURLCamera();

	const std::string &Path() const { return( mPath ); }
	const std::string &Username() const { return( mUser ); }
	const std::string &Password() const { return( mPass ); }

	void Initialise();
	void Terminate();

	int PrimeCapture();
	int PreCapture();
	int Capture( Image &image );
	int PostCapture();

	size_t data_callback(void *buffer, size_t size, size_t nmemb, void *userdata);
	size_t header_callback(void *buffer, size_t size, size_t nmemb, void *userdata);
	int progress_callback(void *userdata, double dltotal, double dlnow, double ultotal, double ulnow);	
	int debug_callback(CURL* handle, curl_infotype type, char* str, size_t strsize, void* data);
	void* thread_func();
	int lock();
	int unlock();

private:
	int nRet;
	CURLcode cRet;

};

/* Dispatchers */
size_t header_callback_dispatcher(void *buffer, size_t size, size_t nmemb, void *userdata);
size_t data_callback_dispatcher(void *buffer, size_t size, size_t nmemb, void *userdata);
int progress_callback_dispatcher(void *userdata, double dltotal, double dlnow, double ultotal, double ulnow);
void* thread_func_dispatcher(void* object);

#endif // HAVE_LIBCURL

#endif // ZM_CURL_CAMERA_H