/*
 * linuxdvb output/writer handling.
 *
 * konfetti 2010 based on linuxdvb.c code from libeplayer2
 *
 * 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
 *
 */

/* ***************************** */
/* Includes                      */
/* ***************************** */

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/ioctl.h>
#include <linux/dvb/video.h>
#include <linux/dvb/audio.h>

#include <memory.h>
#include <asm/types.h>
#include <pthread.h>
#include <errno.h>

#include "stm_ioctls.h"
#include "bcm_ioctls.h"

#include "common.h"
#include "output.h"
#include "debug.h"
#include "misc.h"
#include "pes.h"
#include "writer.h"

/* ***************************** */
/* Makros/Constants              */
/* ***************************** */

/* ***************************** */
/* Types                         */
/* ***************************** */


/* ***************************** */
/* Varaibles                     */
/* ***************************** */

/* ***************************** */
/* Prototypes                    */
/* ***************************** */

/* ***************************** */
/* Functions                     */
/* ***************************** */

int32_t InsertVideoPrivateDataHeader(uint8_t *data, int32_t payload_size)
{
	BitPacker_t ld2 = {data, 0, 32};
	int32_t i = 0;

	PutBits(&ld2, PES_PRIVATE_DATA_FLAG, 8);
	PutBits(&ld2, payload_size & 0xff, 8);
	PutBits(&ld2, (payload_size >> 8) & 0xff, 8);
	PutBits(&ld2, (payload_size >> 16) & 0xff, 8);

	for (i = 4; i < (PES_PRIVATE_DATA_LENGTH + 1); i++)
	{
		PutBits(&ld2, 0, 8);
	}

	FlushBits(&ld2);

	return PES_PRIVATE_DATA_LENGTH + 1;
}

void UpdatePesHeaderPayloadSize(uint8_t *data, int32_t size)
{
	if (size > MAX_PES_PACKET_SIZE || size < 0)
		size = 0;
	data[4] = size >> 8;
	data[5] = size & 0xFF;
}

int32_t InsertPesHeader(uint8_t *data, int32_t size, uint8_t stream_id, uint64_t pts, int32_t pic_start_code)
{
	BitPacker_t ld2 = {data, 0, 32};

	PutBits(&ld2, 0x0, 8);
	PutBits(&ld2, 0x0, 8);
	PutBits(&ld2, 0x1, 8);       // Start Code
	PutBits(&ld2, stream_id, 8); // Stream_id = Audio Stream

	if (size > 0)
	{
		size += 3 + (pts != INVALID_PTS_VALUE ? 5 : 0) + (pic_start_code ? (5) : 0);
	}

	if (size > MAX_PES_PACKET_SIZE || size < 0)
	{
		size = 0; // unbounded
	}

	//4
	PutBits(&ld2, size, 16); // PES_packet_length

	//6 = 4+2
	PutBits(&ld2, 0x2, 2);  // 10
	PutBits(&ld2, 0x0, 2);  // PES_Scrambling_control
	PutBits(&ld2, 0x0, 1);  // PES_Priority
	PutBits(&ld2, 0x0, 1);  // data_alignment_indicator
	PutBits(&ld2, 0x0, 1);  // Copyright
	PutBits(&ld2, 0x0, 1);  // Original or Copy
	//7 = 6+1

	if (pts != INVALID_PTS_VALUE)
	{
		PutBits(&ld2, 0x2, 2);
	}
	else
	{
		PutBits(&ld2, 0x0, 2); // PTS_DTS flag
	}

	PutBits(&ld2, 0x0, 1); // ESCR_flag
	PutBits(&ld2, 0x0, 1); // ES_rate_flag
	PutBits(&ld2, 0x0, 1); // DSM_trick_mode_flag
	PutBits(&ld2, 0x0, 1); // additional_copy_ingo_flag
	PutBits(&ld2, 0x0, 1); // PES_CRC_flag
	PutBits(&ld2, 0x0, 1); // PES_extension_flag
	//8 = 7+1

	if (pts != INVALID_PTS_VALUE)
	{
		PutBits(&ld2, 0x5, 8);
	}
	else
	{
		PutBits(&ld2, 0x0, 8); // PES_header_data_length
	}
	//9 = 8+1

	if (pts != INVALID_PTS_VALUE)
	{
		PutBits(&ld2, 0x2, 4);
		PutBits(&ld2, (pts >> 30) & 0x7, 3);
		PutBits(&ld2, 0x1, 1);
		PutBits(&ld2, (pts >> 15) & 0x7fff, 15);
		PutBits(&ld2, 0x1, 1);
		PutBits(&ld2, pts & 0x7fff, 15);
		PutBits(&ld2, 0x1, 1);
	}
	//14 = 9+5

	if (pic_start_code)
	{
		PutBits(&ld2, 0x0, 8);
		PutBits(&ld2, 0x0, 8);
		PutBits(&ld2, 0x1, 8); // Start Code
		PutBits(&ld2, pic_start_code & 0xff, 8); // 00, for picture start
		PutBits(&ld2, (pic_start_code >> 8) & 0xff, 8); // For any extra information (like in mpeg4p2, the pic_start_code)
		//14 + 4 = 18
	}

	FlushBits(&ld2);

	return (ld2.Ptr - data);
}