/* === S Y N F I G ========================================================= */
/*!	\file trgt_dv.cpp
**	\brief ppm Target Module
**
**	$Id$
**
**	\legal
**	Copyright (c) 2002-2005 Robert B. Quattlebaum Jr., Adrian Bentley
**	Copyright (c) 2007 Chris Moore
**
**	This package 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 package 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.
**	\endlegal
**
** === N O T E S ===========================================================
**
** ========================================================================= */

/* === H E A D E R S ======================================================= */

#ifdef USING_PCH
#	include "pch.h"
#else
#ifdef HAVE_CONFIG_H
#	include <config.h>
#endif

#include <synfig/localization.h>
#include <synfig/general.h>

#include <ETL/stringf>
#include "trgt_dv.h"
#include <cstdio>
#include <sys/types.h>
#if HAVE_SYS_WAIT_H
 #include <sys/wait.h>
#endif
#if HAVE_IO_H
 #include <io.h>
#endif
#if HAVE_PROCESS_H
 #include <process.h>
#endif
#if HAVE_FCNTL_H
 #include <fcntl.h>
#endif
#include <unistd.h>
#include <algorithm>
#include <functional>
#include <ETL/clock>

#endif

/* === M A C R O S ========================================================= */

using namespace synfig;
using namespace std;
using namespace etl;

#if defined(HAVE_FORK) && defined(HAVE_PIPE) && defined(HAVE_WAITPID)
 #define UNIX_PIPE_TO_PROCESSES
#else
 #define WIN32_PIPE_TO_PROCESSES
#endif

/* === G L O B A L S ======================================================= */

SYNFIG_TARGET_INIT(dv_trgt);
SYNFIG_TARGET_SET_NAME(dv_trgt,"dv");
SYNFIG_TARGET_SET_EXT(dv_trgt,"dv");
SYNFIG_TARGET_SET_VERSION(dv_trgt,"0.1");
SYNFIG_TARGET_SET_CVS_ID(dv_trgt,"$Id$");

/* === M E T H O D S ======================================================= */


dv_trgt::dv_trgt(const char *Filename, const synfig::TargetParam & /* params */):
	pid(-1),
	imagecount(0),
	wide_aspect(false),
	file(NULL),
	filename(Filename),
	buffer(NULL),
	color_buffer(NULL)
{
	set_alpha_mode(TARGET_ALPHA_MODE_FILL);
}

dv_trgt::~dv_trgt()
{
	if(file){
#if defined(WIN32_PIPE_TO_PROCESSES)
		pclose(file);
#elif defined(UNIX_PIPE_TO_PROCESSES)
		fclose(file);
		int status;
		waitpid(pid,&status,0);
#endif
	}
	file=NULL;
	delete [] buffer;
	delete [] color_buffer;
}

bool
dv_trgt::set_rend_desc(RendDesc *given_desc)
{
	// Set the aspect ratio
	if(wide_aspect)
	{
		// 16:9 Aspect
		given_desc->set_wh(160,90);

		// Widescreen should be progressive scan
		given_desc->set_interlaced(false);
	}
	else
	{
		// 4:3 Aspect
		given_desc->set_wh(400,300);

		// We should be interlaced
		given_desc->set_interlaced(true);
	}

	// but the pixel res should be 720x480
	given_desc->clear_flags(),given_desc->set_wh(720,480);

	// NTSC Frame rate is 29.97
	given_desc->set_frame_rate(29.97);

	// The pipe to encodedv is PPM, which needs RGB data
	//given_desc->set_pixel_format(PF_RGB);

	// Set the description
	desc=*given_desc;

	return true;
}

bool
dv_trgt::init(synfig::ProgressCallback * /* cb */)
{
	imagecount=desc.get_frame_start();

#if defined(WIN32_PIPE_TO_PROCESSES)

	string command;

	if(wide_aspect)
		command=strprintf("encodedv -w 1 - > \"%s\"\n",filename.c_str());
	else
		command=strprintf("encodedv - > \"%s\"\n",filename.c_str());

	// Open the pipe to encodedv
	file=popen(command.c_str(),POPEN_BINARY_WRITE_TYPE);

	if(!file)
	{
		synfig::error(_("Unable to open pipe to encodedv"));
		return false;
	}

#elif defined(UNIX_PIPE_TO_PROCESSES)

	int p[2];

	if (pipe(p)) {
		synfig::error(_("Unable to open pipe to encodedv"));
		return false;
	};

	pid_t pid = fork();

	if (pid == -1) {
		synfig::error(_("Unable to open pipe to encodedv"));
		return false;
	}

	if (pid == 0){
		// Child process
		// Close pipeout, not needed
		close(p[1]);
		// Dup pipeout to stdin
		if( dup2( p[0], STDIN_FILENO ) == -1 ){
			synfig::error(_("Unable to open pipe to encodedv"));
			return false;
		}
		// Close the unneeded pipeout
		close(p[0]);
		// Open filename to stdout
		FILE* outfile = fopen(filename.c_str(),"wb");
		if( outfile == NULL ){
			synfig::error(_("Unable to open pipe to encodedv"));
			return false;
		}
		int outfilefd = fileno(outfile);
		if( outfilefd == -1 ){
			synfig::error(_("Unable to open pipe to encodedv"));
			return false;
		}
		if( dup2( outfilefd, STDOUT_FILENO ) == -1 ){
			synfig::error(_("Unable to open pipe to encodedv"));
			return false;
		}

		if(wide_aspect)
			execlp("encodedv", "encodedv", "-w", "1", "-", (const char *)NULL);
		else
			execlp("encodedv", "encodedv", "-", (const char *)NULL);
		// We should never reach here unless the exec failed
		synfig::error(_("Unable to open pipe to encodedv"));
		return false;
	} else {
		// Parent process
		// Close pipein, not needed
		close(p[0]);
		// Save pipeout to file handle, will write to it later
		file = fdopen(p[1], "wb");
		if (file == NULL) {
			synfig::error(_("Unable to open pipe to encodedv"));
			return false;
		}
	}

#else
	#error There are no known APIs for creating child processes
#endif


	// Sleep for a moment to let the pipe catch up
	etl::clock().sleep(0.25f);

	return true;
}

void
dv_trgt::end_frame()
{
	fprintf(file, " ");
	fflush(file);
	imagecount++;
}

bool
dv_trgt::start_frame(synfig::ProgressCallback */*callback*/)
{
	int w=desc.get_w(),h=desc.get_h();

	if(!file)
		return false;

	fprintf(file, "P6\n");
	fprintf(file, "%d %d\n", w, h);
	fprintf(file, "%d\n", 255);

	delete [] buffer;
	buffer=new unsigned char[3*w];

	delete [] color_buffer;
	color_buffer=new Color[w];

	return true;
}

Color *
dv_trgt::start_scanline(int /*scanline*/)
{
	return color_buffer;
}

bool
dv_trgt::end_scanline()
{
	if(!file)
		return false;

	color_to_pixelformat(buffer, color_buffer, PF_RGB, 0, desc.get_w());

	if(!fwrite(buffer,1,desc.get_w()*3,file))
		return false;

	return true;
}