//     ____                _       __               
//    / __ )____  _____   | |     / /___ ___________
//   / __  / __ \/ ___/   | | /| / / __ `/ ___/ ___/
//  / /_/ / /_/ (__  )    | |/ |/ / /_/ / /  (__  ) 
// /_____/\____/____/     |__/|__/\__,_/_/  /____/  
//                                              
//       A futuristic real-time strategy game.
//          This file is part of Bos Wars.
//
/**@name movie.cpp - Movie playback functions. */
//
//      (c) Copyright 2005 by Nehal Mistry and Jimmy Salmon
//
//      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; only version 2 of the License.
//
//      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.
//
//      $Id: movie.cpp 8550 2007-02-10 12:33:10Z feb $

//@{

#ifdef USE_THEORA

/*----------------------------------------------------------------------------
-- Includes
----------------------------------------------------------------------------*/

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#include "stratagus.h"
#include "video.h"
#include "sound.h"
#include "sound_server.h"
#include "movie.h"
#include "network.h"
#include "iocompat.h"
#include "iolib.h"

#include "SDL.h"

/*----------------------------------------------------------------------------
--  Defines
----------------------------------------------------------------------------*/

/*----------------------------------------------------------------------------
--  Variables
----------------------------------------------------------------------------*/

extern SDL_Surface *TheScreen;
static int MovieStop;

/*----------------------------------------------------------------------------
--  Functions
----------------------------------------------------------------------------*/

/**
**  Callbacks for movie input.
*/

static void MovieCallbackButtonPressed(unsigned dummy)
{
	MovieStop = 1;
}

static void MovieCallbackButtonReleased(unsigned dummy)
{
}

static void MovieCallbackKeyPressed(unsigned dummya, unsigned dummyb)
{
	MovieStop = 1;
}


static void MovieCallbackKeyReleased(unsigned dummya, unsigned dummyb)
{
}

static void MovieCallbackKeyRepeated(unsigned dummya, unsigned dummyb)
{
}

static void MovieCallbackMouseMove(int dummya, int dummyb)
{
}

static void MovieCallbackMouseExit(void)
{
}

/**
**  FIXME: docu
*/
static int OutputTheora(OggData *data, SDL_Overlay *yuv_overlay, SDL_Rect *rect)
{
	int i;
	yuv_buffer yuv;
	int crop_offset;

	theora_decode_YUVout(&data->tstate, &yuv);

	if (SDL_MUSTLOCK(TheScreen)) {
		if (SDL_LockSurface(TheScreen) < 0) {
			return - 1;
		}
	}

	if (SDL_LockYUVOverlay(yuv_overlay) < 0) {
		return -1;
	}

	crop_offset = data->tinfo.offset_x + yuv.y_stride * data->tinfo.offset_y;
	for (i = 0; i < yuv_overlay->h; ++i) {
		memcpy(yuv_overlay->pixels[0] + yuv_overlay->pitches[0] * i,
			yuv.y + crop_offset + yuv.y_stride * i, yuv_overlay->w);
	}

	crop_offset = (data->tinfo.offset_x / 2) + (yuv.uv_stride) *
		(data->tinfo.offset_y / 2);
	for (i = 0; i < yuv_overlay->h / 2; ++i) {
		memcpy(yuv_overlay->pixels[1] + yuv_overlay->pitches[1] * i,
			yuv.v + yuv.uv_stride * i, yuv_overlay->w / 2);
		memcpy(yuv_overlay->pixels[2] + yuv_overlay->pitches[2] * i,
			yuv.u + crop_offset + yuv.uv_stride * i, yuv_overlay->w / 2);
	}

	if (SDL_MUSTLOCK(TheScreen)) {
		SDL_UnlockSurface(TheScreen);
	}
	SDL_UnlockYUVOverlay(yuv_overlay);

	SDL_DisplayYUVOverlay(yuv_overlay, rect);

	return 0;
}

/**
**  FIXME: docu
*/
static int TheoraProcessData(OggData *data)
{
	ogg_packet packet;

	while (1) {
		if (ogg_stream_packetout(&data->vstream, &packet) != 1) {
			if (OggGetNextPage(&data->page, &data->sync, data->File)) {
				// EOF
				return -1;
			}

			ogg_stream_pagein(&data->vstream, &data->page);
		} else {
			theora_decode_packetin(&data->tstate, &packet);
			return 0;
		}
	}
}


/**
**  Play a video file.
**
**  @param name   Filename of movie file.
**
**  @return       Non-zero if file isn't a supported movie.
*/
int PlayMovie(const std::string &name)
{
	OggData data;
	CFile f;
	SDL_Rect rect;
	SDL_Overlay *yuv_overlay;
	CSample *sample;
	const EventCallback *old_callbacks;
	EventCallback callbacks;
	unsigned int start_ticks;
	int need_data;
	int diff;
	char buffer[PATH_MAX];

	LibraryFileName(name.c_str(), buffer, sizeof(buffer));

	if (f.open(buffer, CL_OPEN_READ) == -1) {
		fprintf(stderr, "Can't open file `%s'\n", name.c_str());
		return -1;
	}

	memset(&data, 0, sizeof(data));
	if (OggInit(&f, &data) || !data.video) {
		OggFree(&data);
		f.close();
		return -1;
	}

	data.File = &f;

	if (data.tinfo.frame_width * 300 / 4 > data.tinfo.frame_height * 100) {
		rect.w = Video.Width;
		rect.h = Video.Width * data.tinfo.frame_height / data.tinfo.frame_width;
		rect.x = 0;
		rect.y = (Video.Height - rect.h) / 2;
	} else {
		rect.w = Video.Height * data.tinfo.frame_width / data.tinfo.frame_height;
		rect.h = Video.Height;
		rect.x = (Video.Width - rect.w) / 2;
		rect.y = 0;
	}

	yuv_overlay = SDL_CreateYUVOverlay(data.tinfo.frame_width,
		data.tinfo.frame_height, SDL_YV12_OVERLAY, TheScreen);

	if (yuv_overlay == NULL) {
		fprintf(stderr, "SDL_CreateYUVOverlay: %s\n", SDL_GetError());
		OggFree(&data);
		f.close();
		return 0;
	}

	StopMusic();
	if ((sample = LoadVorbis(buffer, PlayAudioStream))) {
		if ((sample->Channels != 1 && sample->Channels != 2) ||
				sample->SampleSize != 16) {
			fprintf(stderr, "Unsupported sound format in movie\n");
			delete sample;
			SDL_FreeYUVOverlay(yuv_overlay);
			OggFree(&data);
			f.close();
			return 0;
		}
		PlayMusic(sample);
	}

	callbacks.ButtonPressed = MovieCallbackButtonPressed;
	callbacks.ButtonReleased = MovieCallbackButtonReleased;
	callbacks.MouseMoved = MovieCallbackMouseMove;
	callbacks.MouseExit = MovieCallbackMouseExit;
	callbacks.KeyPressed = MovieCallbackKeyPressed;
	callbacks.KeyReleased = MovieCallbackKeyReleased;
	callbacks.KeyRepeated = MovieCallbackKeyRepeated;
	callbacks.NetworkEvent = NetworkEvent;

	old_callbacks = GetCallbacks();
	SetCallbacks(&callbacks);

	Invalidate();
	RealizeVideoMemory();

	MovieStop = 0;
	start_ticks = SDL_GetTicks();
	need_data = 1;
	while (!MovieStop) {
		if (need_data) {
			if (TheoraProcessData(&data)) {
				break;
			}
			need_data = 0;
		}

		diff = SDL_GetTicks() - start_ticks - static_cast<int>(
			theora_granule_time(&data.tstate, data.tstate.granulepos) * 1000);

		if (diff > 100) {
			// too far behind, skip some frames
			need_data = 1;
			continue;
		}
		if (diff > 0) {
			OutputTheora(&data, yuv_overlay, &rect);
			need_data = 1;
		}
		
		WaitEventsOneFrame();
	}

	StopMusic();
	SDL_FreeYUVOverlay(yuv_overlay);

	OggFree(&data);
	f.close();

	SetCallbacks(old_callbacks);

	return 0;
}

#else

#include <string>

/**
**  FIXME: docu
*/
int PlayMovie(const std::string &name)
{
	if (strstr(name.c_str(), ".ogg") || strstr(name.c_str(), ".avi")) {
		return 0;
	}
	return -1;
}

#endif

//@}