/*
 * 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 WMV3_PRIVATE_DATA_LENGTH        4

#define METADATA_STRUCT_A_START             12
#define METADATA_STRUCT_B_START             24
#define METADATA_STRUCT_B_FRAMERATE_START   32
#define METADATA_STRUCT_C_START             8

#define WMV_DEBUG

#ifdef WMV_DEBUG

static short debug_level = 0;

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

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


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

typedef struct {
    unsigned char privateData[WMV3_PRIVATE_DATA_LENGTH];
    unsigned int width;
    unsigned int height;
    unsigned int framerate;
} awmv_t;

static const unsigned char Metadata[] = {
    0x00, 0x00, 0x00, 0xc5,
    0x04, 0x00, 0x00, 0x00,
    0xc0, 0x00, 0x00, 0x00,	/* Struct C set for for advanced profile */
    0x00, 0x00, 0x00, 0x00,	/* Struct A */
    0x00, 0x00, 0x00, 0x00,
    0x0c, 0x00, 0x00, 0x00,
    0x60, 0x00, 0x00, 0x00,	/* Struct B */
    0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0x00
};

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

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

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

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

    wmv_printf(10, "\n");

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

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

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

    wmv_printf(10, "VideoPts %lld\n", call->Pts);
    wmv_printf(10, "Got Private Size %d\n", call->stream->codec->extradata_size);

    memcpy(private_data.privateData, call->stream->codec->extradata, call->stream->codec->extradata_size > WMV3_PRIVATE_DATA_LENGTH ? WMV3_PRIVATE_DATA_LENGTH : call->stream->codec->extradata_size);

    private_data.width = call->stream->codec->width;
    private_data.height = call->stream->codec->height;
    private_data.framerate = 1000.0 * av_q2d(call->stream->r_frame_rate);      /* rational to double */


#define PES_MIN_HEADER_SIZE 9
    if (initialHeader) {
	unsigned char PesPacket[PES_MIN_HEADER_SIZE + 128];
	unsigned char *PesPtr;
	unsigned int MetadataLength;
	unsigned int crazyFramerate = 0;

	wmv_printf(10, "biWidth: %d\n", private_data.width);
	wmv_printf(10, "biHeight: %d\n", private_data.height);

	crazyFramerate = ((10000000.0 / private_data.framerate) * 1000.0);
	wmv_printf(10, "crazyFramerate: %u\n", crazyFramerate);

	PesPtr = &PesPacket[PES_MIN_HEADER_SIZE];

	memcpy(PesPtr, Metadata, sizeof(Metadata));
	PesPtr += METADATA_STRUCT_C_START;

	memcpy(PesPtr, private_data.privateData, WMV3_PRIVATE_DATA_LENGTH);
	PesPtr += WMV3_PRIVATE_DATA_LENGTH;

	/* Metadata Header Struct A */
	*PesPtr++ = (private_data.height >> 0) & 0xff;
	*PesPtr++ = (private_data.height >> 8) & 0xff;
	*PesPtr++ = (private_data.height >> 16) & 0xff;
	*PesPtr++ = private_data.height >> 24;
	*PesPtr++ = (private_data.width >> 0) & 0xff;
	*PesPtr++ = (private_data.width >> 8) & 0xff;
	*PesPtr++ = (private_data.width >> 16) & 0xff;
	*PesPtr++ = private_data.width >> 24;

	PesPtr += 12;		/* Skip flag word and Struct B first 8 bytes */

	*PesPtr++ = (crazyFramerate >> 0) & 0xff;
	*PesPtr++ = (crazyFramerate >> 8) & 0xff;
	*PesPtr++ = (crazyFramerate >> 16) & 0xff;
	*PesPtr++ = crazyFramerate >> 24;

	MetadataLength = PesPtr - &PesPacket[PES_MIN_HEADER_SIZE];

	int HeaderLength =
	    InsertPesHeader(PesPacket, MetadataLength,
			    VC1_VIDEO_PES_START_CODE, INVALID_PTS_VALUE,
			    0);

	len = write(call->fd, PesPacket, HeaderLength + MetadataLength);

	initialHeader = 0;
    }

    if (call->len > 0 && call->data) {
	unsigned int Position = 0;
	unsigned char insertSampleHeader = 1;
	while (Position < call->len) {

	    int PacketLength =
		(call->len - Position) <=
		MAX_PES_PACKET_SIZE ? (call->len -
				       Position) : MAX_PES_PACKET_SIZE;

	    int Remaining = call->len - Position - PacketLength;

	    wmv_printf(20, "PacketLength=%d, Remaining=%d, Position=%d\n",
		       PacketLength, Remaining, Position);

	    unsigned char PesHeader[PES_MAX_HEADER_SIZE];
	    memset(PesHeader, '0', PES_MAX_HEADER_SIZE);
	    int HeaderLength =
		InsertPesHeader(PesHeader, PacketLength,
				VC1_VIDEO_PES_START_CODE, call->Pts, 0);
	    unsigned char *PacketStart;

	    if (insertSampleHeader) {
		unsigned int PesLength;
		unsigned int PrivateHeaderLength;

		PrivateHeaderLength =
		    InsertVideoPrivateDataHeader(&PesHeader[HeaderLength],
						 call->len);
		/* Update PesLength */
		PesLength = PesHeader[PES_LENGTH_BYTE_0] +
		    (PesHeader[PES_LENGTH_BYTE_1] << 8) +
		    PrivateHeaderLength;
		PesHeader[PES_LENGTH_BYTE_0] = PesLength & 0xff;
		PesHeader[PES_LENGTH_BYTE_1] = (PesLength >> 8) & 0xff;
		PesHeader[PES_HEADER_DATA_LENGTH_BYTE] +=
		    PrivateHeaderLength;
		PesHeader[PES_FLAGS_BYTE] |= PES_EXTENSION_DATA_PRESENT;

		HeaderLength += PrivateHeaderLength;
		insertSampleHeader = 0;
	    }

	    PacketStart = malloc(call->len + HeaderLength);
	    memcpy(PacketStart, PesHeader, HeaderLength);
	    memcpy(PacketStart + HeaderLength, call->data + Position,
		   PacketLength);

	    len =
		write(call->fd, PacketStart, PacketLength + HeaderLength);
	    free(PacketStart);

	    Position += PacketLength;
	    call->Pts = INVALID_PTS_VALUE;
	}
    }

    wmv_printf(10, "< %d\n", len);
    return len;
}

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

static WriterCaps_t caps = {
    "wmv",
    eVideo,
    "V_WMV",
    VIDEO_ENCODING_WMV
};

struct Writer_s WriterVideoWMV = {
    &reset,
    &writeData,
    NULL,
    &caps
};