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

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

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

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

static int initialHeader = 1;

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

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

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

static uint8_t updateCodecData(uint8_t *data, int32_t size)
{
	static uint8_t *oldData = NULL;
	static int32_t oldSize = 0;

	uint8_t update = 0;
	if (data != NULL && size > 0)
	{
		if (size != oldSize)
		{
			update = 1;
		}
		else
		{
			uint32_t i = 0;
			for (i = 0; i < size; i++)
			{
				if (data[i] != oldData[i])
				{
					update = 1;
					break;
				}
			}
		}
	}

	if (update)
	{
		if (oldData != NULL)
		{
			free(oldData);
		}
		oldData = malloc(size);
		memcpy(oldData, data, size);
		oldSize = size;
	}

	return update;
}

static int writeData(void *_call)
{
	WriterAVCallData_t *call = (WriterAVCallData_t *) _call;

	unsigned char  PesHeader[PES_MAX_HEADER_SIZE];
	unsigned char  FakeHeaders[64]; // 64bytes should be enough to make the fake headers
	unsigned int   FakeHeaderLength;
	unsigned char  Version             = 5;
	unsigned int   FakeStartCode       = (Version << 8) | PES_VERSION_FAKE_START_CODE;
	unsigned int   usecPerFrame = 41708; /* Hellmaster1024: default value */
	BitPacker_t ld = {FakeHeaders, 0, 32};

	divx_printf(10, "\n");

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

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

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

	divx_printf(10, "AudioPts %lld\n", call->Pts);

	usecPerFrame = 1000000000 / call->FrameRate;
	divx_printf(10, "Microsecends per frame = %d\n", usecPerFrame);

	memset(FakeHeaders, 0, sizeof(FakeHeaders));

	/* Create info record for frame parser */
	/* divx4 & 5
	   VOS
	   PutBits(&ld, 0x0, 8);
	   PutBits(&ld, 0x0, 8);
	 */
	PutBits(&ld, 0x1b0, 32);      // startcode
	PutBits(&ld, 0, 8);           // profile = reserved
	PutBits(&ld, 0x1b2, 32);      // startcode (user data)
	PutBits(&ld, 0x53545443, 32); // STTC - an embedded ST timecode from an avi file
	PutBits(&ld, usecPerFrame, 32);
	// microseconds per frame
	FlushBits(&ld);

	FakeHeaderLength    = (ld.Ptr - (FakeHeaders));

	struct iovec iov[4];
	int ic = 0;
	iov[ic].iov_base = PesHeader;
	iov[ic++].iov_len = InsertPesHeader(PesHeader, call->len, MPEG_VIDEO_PES_START_CODE, call->Pts, FakeStartCode);
	iov[ic].iov_base = FakeHeaders;
	iov[ic++].iov_len = FakeHeaderLength;

	if (initialHeader)
	{
		iov[ic].iov_base = call->private_data;
		iov[ic++].iov_len = call->private_size;
		initialHeader = 0;
	}

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

	int len = call->WriteV(call->fd, iov, ic);

	divx_printf(10, "xvid_Write < len=%d\n", len);

	return len;
}

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

static WriterCaps_t mpeg4p2_caps =
{
	"mpeg4p2",
	eVideo,
	"V_MPEG4",
	VIDEO_ENCODING_MPEG4P2,
	-1,
	-1
};

struct Writer_s WriterVideoMPEG4 =
{
	&reset,
	&writeData,
	&mpeg4p2_caps
};

struct Writer_s WriterVideoMSCOMP =
{
	&reset,
	&writeData,
	&mpeg4p2_caps
};

static WriterCaps_t fourcc_caps =
{
	"fourcc",
	eVideo,
	"V_MS/VFW/FOURCC",
	VIDEO_ENCODING_MPEG4P2,
	-1,
	-1
};

struct Writer_s WriterVideoFOURCC =
{
	&reset,
	&writeData,
	&fourcc_caps
};

static WriterCaps_t divx_caps =
{
	"divx",
	eVideo,
	"V_MKV/XVID",
	VIDEO_ENCODING_MPEG4P2,
	-1,
	-1
};

struct Writer_s WriterVideoDIVX =
{
	&reset,
	&writeData,
	&divx_caps
};