/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/*
 * RTVideoRec Realtime video recoder and encoder for Linux
 *
 * Copyright (C) 2004  Bent Bisballe
 * Copyright (C) 2004  B. Stultiens
 * Copyright (C) 2004  Koen Otter and Glenn van der Meyden
 *
 * 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
 */
#include <config.h>
#ifdef USE_GUI
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <errno.h>
#include <libraw1394/raw1394.h>

#include "dv.h"

#include "decoder.h"
#include "debug.h"

Decoder::Decoder(Error* err,
                 sem_t *gencode_sem,
                 sem_t *gplayer_sem,
                 Queue<Frame> *gencode_queue,
                 Queue<Frame> *gplayer_queue,
                 pthread_mutex_t *gmutex,
                 volatile int *grunning)
{
  errobj = err;
  encode_sem = gencode_sem;
  player_sem = gplayer_sem;
  encode_queue = gencode_queue;
  player_queue = gplayer_queue;
  mutex = gmutex;
  running = grunning;

  // Initialize libdv
}

Decoder::~Decoder()
{
  // Close libdv
}

static int raw_reader( raw1394handle_t handle, int channel, size_t length, quadlet_t *data )
{
	static char *framedata = NULL;

  // Only process packets with reasonable length.
	if ( length > 16 )
	{
		unsigned char * p = ( unsigned char* ) & data[ 3 ];
		int section_type = p[ 0 ] >> 5;           // section type is in bits 5 - 7
		int dif_sequence = p[ 1 ] >> 4;           // dif sequence number is in bits 4 - 7
		int dif_block = p[ 2 ];

		if ( section_type == 0 && dif_sequence == 0 )
		{
			if ( framedata != NULL )
			{
				raw1394_set_userdata(handle, (void *)framedata);
				framedata = NULL;
			}
		}

		if(!framedata)
		{
			framedata = (char *)malloc(DVPACKAGE_SIZE); // dvframe.h
			if(!framedata)
			{
				// We're fucked
				exit(1);
			}
		}

		switch ( section_type )
		{
		case 0:    // 1 Header block
			// p[3] |= 0x80; // hack to force PAL data
			memcpy( framedata + dif_sequence * 150 * 80, p, 480 );
			break;

		case 1:    // 2 Subcode blocks
			memcpy( framedata + dif_sequence * 150 * 80 + ( 1 + dif_block ) * 80, p, 480 );
			break;

		case 2:    // 3 VAUX blocks
			memcpy( framedata + dif_sequence * 150 * 80 + ( 3 + dif_block ) * 80, p, 480 );
			break;

		case 3:    // 9 Audio blocks interleaved with video
			memcpy( framedata + dif_sequence * 150 * 80 + ( 6 + dif_block * 16 ) * 80, p, 480 );
			break;

		case 4:    // 135 Video blocks interleaved with audio
			memcpy( framedata + dif_sequence * 150 * 80 + ( 7 + ( dif_block / 15 ) + dif_block ) * 80, p, 480 );
			break;

		default:   // we can't handle any other data
			break;
		}
	}
	return 0;
}


void Decoder::decode()
{
  // FIXME: Read port and channel data from config.
	int port = 0;
	int channel = 63; // 63 is default channel... sucks.

	int n_ports;
	struct raw1394_portinfo pinf[ 16 ];
	raw1394handle_t handle;

  // Get handle to firewire channels
	handle = raw1394_new_handle();
	if(!handle) {
		fprintf( stderr, "raw1394 - failed to get handle: %s.\n", strerror( errno ) );
		exit( EXIT_FAILURE );
	}

  // how many adapters are hook in?
	if((n_ports = raw1394_get_port_info(handle, pinf, 16)) < 0 ) {
		fprintf( stderr, "raw1394 - failed to get port info: %s.\n", strerror( errno ) );
		raw1394_destroy_handle( handle );
		exit( EXIT_FAILURE );
	}

	// Tell raw1394 which host adapter to use
	if(raw1394_set_port(handle, port) < 0 ) {
    errobj->pushError("Error while opening codec for input stream.");
		fprintf( stderr, "raw1394 - failed to set port: %s.\n", strerror( errno ) );
		exit( EXIT_FAILURE );
	}

	raw1394_set_iso_handler( handle, channel, raw_reader);
	raw1394_set_userdata( handle, ( void* ) NULL);
  raw1394_start_iso_rcv( handle, channel);

  while(*running) {
    uint8_t *ptr;
    int len;
    SDL_Event user_event;
    
    // Read a dvframe
    while(1) {
      raw1394_loop_iterate(handle);
      ptr = (uint8_t *)raw1394_get_userdata(handle);
      if(ptr) {
         raw1394_set_userdata(handle, NULL);
         break;
      }
      len = DVPACKAGE_SIZE;
    }
    Frame *frame = new Frame((void*)ptr, len);

    pthread_mutex_lock(mutex);
    encode_queue->push(frame);
    player_queue->push(frame);
    pthread_mutex_unlock(mutex);
    
    sem_post(encode_sem);
    
    // Create and send SDL event.
    user_event.type = SDL_USEREVENT;
    user_event.user.code = 0;
    user_event.user.data1 = NULL;
    user_event.user.data2 = NULL;
    SDL_PushEvent(&user_event);

    // Free framedata.
    free(ptr);
  }

  // Kick the others so they wake up with empty queues
  sem_post(encode_sem);
  pthread_exit(NULL);
}

void Decoder::run() {
  decode();
}

#endif /*USE_GUI*/