/*
 * 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 <sys/uio.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              */
/* ***************************** */

#define VC1_SEQUENCE_LAYER_METADATA_START_CODE 0x80
#define VC1_FRAME_START_CODE 0x0d

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

//static const unsigned char SequenceLayerStartCode[] = {0x00, 0x00, 0x01, VC1_SEQUENCE_LAYER_METADATA_START_CODE};
static const uint8_t Vc1FrameStartCode[] = {0, 0, 1, VC1_FRAME_START_CODE};

/* ***************************** */
/* Variables                     */
/* ***************************** */

static int initialHeader = 1;
static video_codec_data_t videocodecdata = {0, 0};

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

/* ***************************** */
/* MISC Functions                */
/* ***************************** */

static int reset()
{
	initialHeader = 1;
	return 0;
}

static int writeData(WriterAVCallData_t *call)
{
	//int len = 0;

	vc1_printf(10, "\n");

	if (call == NULL)
	{
		vc1_err("call data is NULL...\n");
		return 0;
	}

	if ((call->data == NULL) || (call->len <= 0))
	{
		vc1_err("parsing NULL Data. ignoring...\n");
		return 0;
	}

	if (call->fd < 0)
	{
		vc1_err("file pointer < 0. ignoring ...\n");
		return 0;
	}

	vc1_printf(10, "VideoPts %lld\n", call->Pts);
	vc1_printf(10, "Got Private Size %d\n", call->private_size);

	unsigned char PesHeader[PES_MAX_HEADER_SIZE + sizeof(Vc1FrameStartCode)];
	int32_t ic = 0;
	struct iovec iov[5];
	unsigned int PacketLength = 0;

	iov[ic++].iov_base = PesHeader;
	if (initialHeader)
	{
		initialHeader = 0;
		if (videocodecdata.data)
		{
			free(videocodecdata.data);
			videocodecdata.data = NULL;
		}
		videocodecdata.length = call->private_size + 8;
		videocodecdata.data  = malloc(videocodecdata.length);
		memset(videocodecdata.data, 0, videocodecdata.length);
		memcpy(videocodecdata.data + 8, call->private_data, call->private_size);
		if (STB_DREAMBOX == GetSTBType() || 0 != ioctl(call->fd, VIDEO_SET_CODEC_DATA, &videocodecdata))
		{
			iov[ic].iov_base  = videocodecdata.data;
			iov[ic++].iov_len = videocodecdata.length;
			PacketLength     += videocodecdata.length;
		}
	}

	uint8_t needFrameStartCode = 0;
	if (sizeof(Vc1FrameStartCode) >= call->len ||
	    memcmp(call->data, Vc1FrameStartCode, sizeof(Vc1FrameStartCode)) != 0)
	{
		needFrameStartCode = 1;
		PacketLength += sizeof(Vc1FrameStartCode);
	}

	iov[ic].iov_base  = call->data;
	iov[ic++].iov_len = call->len;
	PacketLength     += call->len;

	iov[0].iov_len = InsertPesHeader(PesHeader, PacketLength, MPEG_VIDEO_PES_START_CODE, call->Pts, 0);

	/* some mipsel receiver(s) like et4x00 needs to have Copy(0)/Original(1) flag set to Original */
	PesHeader[6] |= 1;

	if (needFrameStartCode)
	{
		memcpy(PesHeader + iov[0].iov_len, Vc1FrameStartCode, sizeof(Vc1FrameStartCode));
		iov[0].iov_len += sizeof(Vc1FrameStartCode);
	}

	if (videocodecdata.data)
	{
		free(videocodecdata.data);
		videocodecdata.data = NULL;
	}

	return call->WriteV(call->fd, iov, ic);
}

/* ***************************** */
/* Writer  Definition            */
/* ***************************** */

static WriterCaps_t caps =
{
	"vc1",
	eVideo,
	"V_VC1",
	VIDEO_ENCODING_VC1,
	STREAMTYPE_VC1,
	CT_MPEG4_PART2
};

struct Writer_s WriterVideoVC1 =
{
	&reset,
	&writeData,
	&caps
};