/*
   orxonox - the future of 3D-vertical-scrollers

   Copyright (C) 2004 orx

   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, or (at your option)
   any later version.

### File Specific:
   main-programmer: David Hasenfratz, Stephan Lienhard
   co-programmer:
*/



/* this is for debug output. It just says, that all calls to PRINT() belong to the DEBUG_MODULE_MEDIA module
   For more information refere to https://www.orxonox.net/cgi-bin/trac.cgi/wiki/DebugOutput
*/
#define DEBUG_MODULE_MEDIA


/* include your own header */
#include "media_container.h"

/* header for debug output */
#include "debug.h"


/**
 * Default constructor
 */
MediaContainer::MediaContainer(const char* filename)
{
  /* set the class id for the base object */
  this->setClassID(CL_MEDIA_CONTAINER, "MediaContainer");

  /* register all formats and codecs */
  av_register_all();

  current_frame = 0;
  num_frames = 0;
	frames_left = true;

  if (filename != NULL)
    this->loadMedia(filename);

}

/**
 * Default destructor
 */
MediaContainer::~MediaContainer()
{

  /* Free the frame */
  av_free(frame);

  /* Close the codec */
  avcodec_close(codec_context);

  /* Close the video file */
  av_close_input_file(format_context);

}

/*GLuint MediaContainer::getFrame(int frame_number)
{

}

GLuint MediaContainer::getNextFrame()
{

}*/

SDL_Surface* MediaContainer::getFrame(int frame_number)
{

}

SDL_Surface* MediaContainer::getNextFrame()
{
	/* get next frame */
	if(av_read_frame(format_context, &packet) >= 0)
	{
		frames_left = true;
		current_frame++;
		PRINTF(1)("current_frame: %i\n", current_frame);


		/* work with the frame */
		/* packet -> SDL_Surface */




	}
	else
		frames_left = false;

}

void MediaContainer::loadMedia(const char* filename)
{
  /* Open video file */
  if (av_open_input_file(&format_context, filename, NULL, 0, NULL) !=0 )
    PRINTF(1)("Could not open %s\n", filename);

  /* Retrieve stream information */
  if (av_find_stream_info(format_context) < 0)
    PRINTF(1)("Could not find stream information in %s\n", filename); 

  // Dump information about file onto standard error
  //dump_format(pFormatCtx, 0, argv[1], false);

  /* Find the first video stream and take it */
  video_stream = -1;
  for(int i = 0; i < format_context->nb_streams; i++)
  {
    // NOTE: different code for the 0.4.9-pre1 release of ffmpeg (tardis)
    // if(format_context->streams[i]->codec.codec_type == CODEC_TYPE_VIDEO)		
    if(format_context->streams[i]->codec->codec_type == CODEC_TYPE_VIDEO)
    {
      video_stream = i;
      break;
    }
  }
  
  if(video_stream == -1)
    PRINTF(1)("Could not find a video stream in %s\n", filename);

  /* Get a pointer to the codec context for the video stream */
  // NOTE: different code for the 0.4.9-pre1 release of ffmpeg (tardis)
  // codec_context = &format_context->streams[video_stream]->codec;
  codec_context = format_context->streams[video_stream]->codec;

  /* Find the decoder for the video stream */
  codec = avcodec_find_decoder(codec_context->codec_id);
  if (codec == NULL)
    PRINTF(1)("Could not find codec\n");

  /* Open codec */
  if (avcodec_open(codec_context, codec) < 0)
    PRINTF(1)("Could not open codec\n");	

}

int MediaContainer::getHeight()
{
	return codec_context->height;
}

int MediaContainer::getWidth()
{
	return codec_context->width;
}

int MediaContainer::getFrameRate()
{

}

void MediaContainer::getStream(/* stream */)
{

}

bool MediaContainer::framesLeft()
{
	return frames_left;
}

void MediaContainer::printMediaInformation()
{
	PRINTF(1)("========================\n");
	PRINTF(1)("========================\n");
	PRINTF(1)("=    MEDIACONTAINER    =\n");
	PRINTF(1)("========================\n");
	PRINTF(1)("========================\n");
	PRINTF(1)("=    AVFormatContext   =\n");
	PRINTF(1)("========================\n");
	PRINTF(1)("filename: %s\n", format_context->filename);
	PRINTF(1)("nb_streams: %i\n", format_context->nb_streams);
	PRINTF(1)("duration: %fs\n", format_context->duration/1000000.);
	PRINTF(1)("file_size: %ikb\n", format_context->file_size/1024);
	PRINTF(1)("bit_rate: %ikb/s\n", format_context->bit_rate/1000);
	PRINTF(1)("nb_frames: %i\n", format_context->streams[video_stream]->nb_frames);
	//PRINTF(1)("r_frame_rate: %ifps\n", format_context->streams[video_stream]->r_frame_rate.num);
	PRINTF(1)("========================\n");
	PRINTF(1)("=    AVCodecContext    =\n");
	PRINTF(1)("========================\n");
	PRINTF(1)("width: %i\n", codec_context->width);
	PRINTF(1)("height: %i\n", codec_context->height);
	PRINTF(1)("========================\n");
	PRINTF(1)("=       AVCodec        =\n");
	PRINTF(1)("========================\n");
	PRINTF(1)("codec name: %s\n", codec->name);
	PRINTF(1)("========================\n");
	PRINTF(1)("========================\n");
}