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/*

 * H263 internal header

 *

 * This file is part of FFmpeg.

 *

 * FFmpeg is free software; you can redistribute it and/or

 * modify it under the terms of the GNU Lesser General Public

 * License as published by the Free Software Foundation; either

 * version 2.1 of the License, or (at your option) any later version.

 *

 * FFmpeg 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

 * Lesser General Public License for more details.

 *

 * You should have received a copy of the GNU Lesser General Public

 * License along with FFmpeg; if not, write to the Free Software

 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

 */

#ifndef AVCODEC_H263_H

#define AVCODEC_H263_H

#include 

#include "libavutil/rational.h"

#include "get_bits.h"

#include "mpegvideo.h"

#include "rl.h"

// The defines below define the number of bits that are read at once for

// reading vlc values. Changing these may improve speed and data cache needs

// be aware though that decreasing them may need the number of stages that is

// passed to get_vlc* to be increased.

#define INTRA_MCBPC_VLC_BITS 6

#define INTER_MCBPC_VLC_BITS 7

#define CBPY_VLC_BITS 6

#define TEX_VLC_BITS 9

extern const AVRational ff_h263_pixel_aspect[16];

extern const uint8_t ff_h263_cbpy_tab[16][2];

extern const uint8_t ff_cbpc_b_tab[4][2];

extern const uint8_t ff_mvtab[33][2];

extern const uint8_t ff_h263_intra_MCBPC_code[9];

extern const uint8_t ff_h263_intra_MCBPC_bits[9];

extern const uint8_t ff_h263_inter_MCBPC_code[28];

extern const uint8_t ff_h263_inter_MCBPC_bits[28];

extern const uint8_t ff_h263_mbtype_b_tab[15][2];

extern VLC ff_h263_intra_MCBPC_vlc;

extern VLC ff_h263_inter_MCBPC_vlc;

extern VLC ff_h263_cbpy_vlc;

extern const uint16_t ff_inter_vlc[103][2];

extern const int8_t ff_inter_level[102];

extern const int8_t ff_inter_run[102];

extern RLTable ff_h263_rl_inter;

extern RLTable ff_rl_intra_aic;

extern const uint16_t ff_h263_format[8][2];

extern const uint8_t ff_modified_quant_tab[2][32];

extern const uint16_t ff_mba_max[6];

extern const uint8_t ff_mba_length[7];

extern uint8_t ff_h263_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];

extern const enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[];

int ff_h263_decode_motion(MpegEncContext * s, int pred, int f_code);

av_const int ff_h263_aspect_to_info(AVRational aspect);

int ff_h263_decode_init(AVCodecContext *avctx);

int ff_h263_decode_frame(AVCodecContext *avctx,

                             void *data, int *got_frame,

                             AVPacket *avpkt);

int ff_h263_decode_end(AVCodecContext *avctx);

void ff_h263_encode_mb(MpegEncContext *s,

                       int16_t block[6][64],

                       int motion_x, int motion_y);

void ff_h263_encode_picture_header(MpegEncContext *s, int picture_number);

void ff_h263_encode_gob_header(MpegEncContext * s, int mb_line);

int16_t *ff_h263_pred_motion(MpegEncContext * s, int block, int dir,

                             int *px, int *py);

void ff_h263_encode_init(MpegEncContext *s);

void ff_h263_decode_init_vlc(void);

int ff_h263_decode_picture_header(MpegEncContext *s);

int ff_h263_decode_gob_header(MpegEncContext *s);

void ff_h263_update_motion_val(MpegEncContext * s);

void ff_h263_loop_filter(MpegEncContext * s);

int ff_h263_decode_mba(MpegEncContext *s);

void ff_h263_encode_mba(MpegEncContext *s);

void ff_init_qscale_tab(MpegEncContext *s);

int ff_h263_pred_dc(MpegEncContext * s, int n, int16_t **dc_val_ptr);

void ff_h263_pred_acdc(MpegEncContext * s, int16_t *block, int n);

/**

 * Print picture info if FF_DEBUG_PICT_INFO is set.

 */

void ff_h263_show_pict_info(MpegEncContext *s);

int ff_intel_h263_decode_picture_header(MpegEncContext *s);

int ff_h263_decode_mb(MpegEncContext *s,

                      int16_t block[6][64]);

/**

 * Return the value of the 3bit "source format" syntax element.

 * This represents some standard picture dimensions or indicates that

 * width&height are explicitly stored later.

 */

int av_const h263_get_picture_format(int width, int height);

void ff_clean_h263_qscales(MpegEncContext *s);

int ff_h263_resync(MpegEncContext *s);

const uint8_t *ff_h263_find_resync_marker(MpegEncContext *s, const uint8_t *p, const uint8_t *end);

int ff_h263_get_gob_height(MpegEncContext *s);

void ff_h263_encode_motion(MpegEncContext * s, int val, int f_code);

static inline int h263_get_motion_length(MpegEncContext * s, int val, int f_code){

    int l, bit_size, code;

    if (val == 0) {

        return ff_mvtab[0][1];

    } else {

        bit_size = f_code - 1;

        /* modulo encoding */

        l= INT_BIT - 6 - bit_size;

        val = (val<>l;

        val--;

        code = (val >> bit_size) + 1;

        return ff_mvtab[code][1] + 1 + bit_size;

    }

}

static inline void ff_h263_encode_motion_vector(MpegEncContext * s, int x, int y, int f_code){

    if(s->flags2 & CODEC_FLAG2_NO_OUTPUT){

        skip_put_bits(&s->pb,

            h263_get_motion_length(s, x, f_code)

           +h263_get_motion_length(s, y, f_code));

    }else{

        ff_h263_encode_motion(s, x, f_code);

        ff_h263_encode_motion(s, y, f_code);

    }

}

static inline int get_p_cbp(MpegEncContext * s,

                      int16_t block[6][64],

                      int motion_x, int motion_y){

    int cbp, i;

    if (s->mpv_flags & FF_MPV_FLAG_CBP_RD) {

        int best_cbpy_score= INT_MAX;

        int best_cbpc_score= INT_MAX;

        int cbpc = (-1), cbpy= (-1);

        const int offset= (s->mv_type==MV_TYPE_16X16 ? 0 : 16) + (s->dquant ? 8 : 0);

        const int lambda= s->lambda2 >> (FF_LAMBDA_SHIFT - 6);

        for(i=0; i<4; i++){

            int score= ff_h263_inter_MCBPC_bits[i + offset] * lambda;

            if(i&1) score += s->coded_score[5];

            if(i&2) score += s->coded_score[4];

            if(score < best_cbpc_score){

                best_cbpc_score= score;

                cbpc= i;

            }

        }

        for(i=0; i<16; i++){

            int score= ff_h263_cbpy_tab[i ^ 0xF][1] * lambda;

            if(i&1) score += s->coded_score[3];

            if(i&2) score += s->coded_score[2];

            if(i&4) score += s->coded_score[1];

            if(i&8) score += s->coded_score[0];

            if(score < best_cbpy_score){

                best_cbpy_score= score;

                cbpy= i;

            }

        }

        cbp= cbpc + 4*cbpy;

        if ((motion_x | motion_y | s->dquant) == 0 && s->mv_type==MV_TYPE_16X16){

            if(best_cbpy_score + best_cbpc_score + 2*lambda >= 0)

                cbp= 0;

        }

        for (i = 0; i < 6; i++) {

            if (s->block_last_index[i] >= 0 && ((cbp >> (5 - i))&1)==0 ){

                s->block_last_index[i]= -1;

                s->dsp.clear_block(s->block[i]);

            }

        }

    }else{

        cbp= 0;

        for (i = 0; i < 6; i++) {

            if (s->block_last_index[i] >= 0)

                cbp |= 1 << (5 - i);

        }

    }

    return cbp;

}

static inline void memsetw(short *tab, int val, int n)

{

    int i;

    for(i=0;i

        tab[i] = val;

}

#endif /* AVCODEC_H263_H */