/*
 * 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 <linux/dvb/stm_ioctls.h>
#include <memory.h>
#include <asm/types.h>
#include <pthread.h>
#include <errno.h>

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

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

#define DIVX_DEBUG

#ifdef DIVX_DEBUG

static short debug_level = 0;

#define divx_printf(level, fmt, x...) do { \
if (debug_level >= level) printf("[%s:%s] " fmt, __FILE__, __FUNCTION__, ## x); } while (0)
#else
#define divx_printf(level, fmt, x...)
#endif

#ifndef DIVX_SILENT
#define divx_err(fmt, x...) do { printf("[%s:%s] " fmt, __FILE__, __FUNCTION__, ## x); } while (0)
#else
#define divx_err(fmt, x...)
#endif

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

/* ***************************** */
/* Varaibles                     */
/* ***************************** */
static int initialHeader = 1;

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

/* ***************************** */
/* MISC Functions                */
/* ***************************** */
static int reset()
{
    initialHeader = 1;
    return 0;
}

static int writeData(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->fd < 0) {
	divx_err("file pointer < 0. ignoring ...\n");
	return 0;
    }

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

    usecPerFrame = 1000000 / av_q2d(call->stream->r_frame_rate);

    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->packet->size, 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->stream->codec->extradata;
	iov[ic++].iov_len = call->stream->codec->extradata_size;

	initialHeader = 0;
    }
    iov[ic].iov_base = call->packet->data;
    iov[ic++].iov_len = call->packet->size;

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

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

    return len;
}

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

static WriterCaps_t mpeg4p2_caps = {
    "mscomp",
    eVideo,
    "V_MSCOMP",
    VIDEO_ENCODING_MPEG4P2
};

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

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

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

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

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