mpegvideo.h - mozsearch

/*

 * Generic DCT based hybrid video encoder

 * Copyright (c) 2000, 2001, 2002 Fabrice Bellard

 * Copyright (c) 2002-2004 Michael Niedermayer

 * 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

*/

/**

 * @file

 * mpegvideo header.

*/

#ifndef AVCODEC_MPEGVIDEO_H

#define AVCODEC_MPEGVIDEO_H

#include "avcodec.h"

#include "blockdsp.h"

#include "error_resilience.h"

#include "fdctdsp.h"

#include "get_bits.h"

#include "h264chroma.h"

#include "h263dsp.h"

#include "hpeldsp.h"

#include "idctdsp.h"

#include "me_cmp.h"

#include "motion_est.h"

#include "mpegpicture.h"

#include "mpegvideoencdsp.h"

#include "pixblockdsp.h"

#include "put_bits.h"

#include "ratecontrol.h"

#include "mpegutils.h"

#include "qpeldsp.h"

#include "videodsp.h"

#define MAX_THREADS 32

#define MAX_B_FRAMES 16

/**

 * Scantable.

*/

typedef struct ScanTable {

    const uint8_t *scantable;

    uint8_t permutated[64];

    uint8_t raster_end[64];

} ScanTable;

/**

 * MpegEncContext.

*/

typedef struct MpegEncContext {

    AVClass *class;

    int y_dc_scale, c_dc_scale;

    int ac_pred;

    int block_last_index[12];  ///< last non zero coefficient in block

    int h263_aic;              ///< Advanced INTRA Coding (AIC)

    /* scantables */

    ScanTable inter_scantable; ///< if inter == intra then intra should be used to reduce the cache usage

    /* WARNING: changes above this line require updates to hardcoded

     *          offsets used in ASM. */

    ScanTable intra_scantable;

    uint8_t permutated_intra_h_scantable[64];

    uint8_t permutated_intra_v_scantable[64];

    struct AVCodecContext *avctx;

    /* The following pointer is intended for codecs sharing code

     * between decoder and encoder and in need of a common context to do so. */

    void *private_ctx;

    /* the following parameters must be initialized before encoding */

    int width, height;///< picture size. must be a multiple of 16

    int gop_size;

    int intra_only;   ///< if true, only intra pictures are generated

    int64_t bit_rate; ///< wanted bit rate

    enum OutputFormat out_format; ///< output format

    int h263_pred;    ///< use MPEG-4/H.263 ac/dc predictions

    int pb_frame;     ///< PB-frame mode (0 = none, 1 = base, 2 = improved)

/* the following codec id fields are deprecated in favor of codec_id */

    int h263_plus;    ///< H.263+ headers

    int h263_flv;     ///< use flv H.263 header

    enum AVCodecID codec_id;     /* see AV_CODEC_ID_xxx */

    int fixed_qscale; ///< fixed qscale if non zero

    int encoding;     ///< true if we are encoding (vs decoding)

    int max_b_frames; ///< max number of B-frames for encoding

    int luma_elim_threshold;

    int chroma_elim_threshold;

    int workaround_bugs;       ///< workaround bugs in encoders which cannot be detected automatically

    int codec_tag;             ///< internal codec_tag upper case converted from avctx codec_tag

    /* the following fields are managed internally by the encoder */

    /* sequence parameters */

    int context_initialized;

    int input_picture_number;  ///< used to set pic->display_picture_number, should not be used for/by anything else

    int coded_picture_number;  ///< used to set pic->coded_picture_number, should not be used for/by anything else

    int picture_number;       //FIXME remove, unclear definition

    int picture_in_gop_number; ///< 0-> first pic in gop, ...

    int mb_width, mb_height;   ///< number of MBs horizontally & vertically

    int mb_stride;             ///< mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11

    int b8_stride;             ///< 2*mb_width+1 used for some 8x8 block arrays to allow simple addressing

    int h_edge_pos, v_edge_pos;///< horizontal / vertical position of the right/bottom edge (pixel replication)

    int mb_num;                ///< number of MBs of a picture

    ptrdiff_t linesize;        ///< line size, in bytes, may be different from width

    ptrdiff_t uvlinesize;      ///< line size, for chroma in bytes, may be different from width

    Picture *picture;          ///< main picture buffer

    Picture **input_picture;   ///< next pictures on display order for encoding

    Picture **reordered_input_picture; ///< pointer to the next pictures in coded order for encoding

    int64_t user_specified_pts; ///< last non-zero pts from AVFrame which was passed into avcodec_send_frame()

/**

     * pts difference between the first and second input frame, used for

     * calculating dts of the first frame when there's a delay */

    int64_t dts_delta;

/**

     * reordered pts to be used as dts for the next output frame when there's

     * a delay */

    int64_t reordered_pts;

    /** bit output */

    PutBitContext pb;

    int start_mb_y;            ///< start mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)

    int end_mb_y;              ///< end   mb_y of this thread (so current thread should process start_mb_y <= row < end_mb_y)

    struct MpegEncContext *thread_context[MAX_THREADS];

    int slice_context_count;   ///< number of used thread_contexts

/**

     * copy of the previous picture structure.

     * note, linesize & data, might not match the previous picture (for field pictures)

*/

    Picture last_picture;

/**

     * copy of the next picture structure.

     * note, linesize & data, might not match the next picture (for field pictures)

*/

    Picture next_picture;

/**

     * Reference to the source picture for encoding.

     * note, linesize & data, might not match the source picture (for field pictures)

*/

    AVFrame *new_picture;

/**

     * copy of the current picture structure.

     * note, linesize & data, might not match the current picture (for field pictures)

*/

    Picture current_picture;    ///< buffer to store the decompressed current picture

    Picture *last_picture_ptr;     ///< pointer to the previous picture.

    Picture *next_picture_ptr;     ///< pointer to the next picture (for bidir pred)

    Picture *current_picture_ptr;  ///< pointer to the current picture

    int skipped_last_frame;

    int last_dc[3];                ///< last DC values for MPEG-1

    int16_t *dc_val_base;

    int16_t *dc_val[3];            ///< used for MPEG-4 DC prediction, all 3 arrays must be continuous

    const uint8_t *y_dc_scale_table;     ///< qscale -> y_dc_scale table

    const uint8_t *c_dc_scale_table;     ///< qscale -> c_dc_scale table

    const uint8_t *chroma_qscale_table;  ///< qscale -> chroma_qscale (H.263)

    uint8_t *coded_block_base;

    uint8_t *coded_block;          ///< used for coded block pattern prediction (msmpeg4v3, wmv1)

    int16_t (*ac_val_base)[16];

    int16_t (*ac_val[3])[16];      ///< used for MPEG-4 AC prediction, all 3 arrays must be continuous

    int mb_skipped;                ///< MUST BE SET only during DECODING

    uint8_t *mbskip_table;        /**< used to avoid copy if macroblock skipped (for black regions for example)

                                   and used for B-frame encoding & decoding (contains skip table of next P-frame) */

    uint8_t *mbintra_table;       ///< used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding

    uint8_t *cbp_table;           ///< used to store cbp, ac_pred for partitioned decoding

    uint8_t *pred_dir_table;      ///< used to store pred_dir for partitioned decoding

    ScratchpadContext sc;

    int qscale;                 ///< QP

    int chroma_qscale;          ///< chroma QP

    unsigned int lambda;        ///< Lagrange multiplier used in rate distortion

    unsigned int lambda2;       ///< (lambda*lambda) >> FF_LAMBDA_SHIFT

    int *lambda_table;

    int adaptive_quant;         ///< use adaptive quantization

    int dquant;                 ///< qscale difference to prev qscale

    int pict_type;              ///< AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...

    int vbv_delay;

    int last_pict_type; //FIXME removes

    int last_non_b_pict_type;   ///< used for MPEG-4 gmc B-frames & ratecontrol

    int droppable;

    int last_lambda_for[5];     ///< last lambda for a specific pict type

    int skipdct;                ///< skip dct and code zero residual

    /* motion compensation */

    int unrestricted_mv;        ///< mv can point outside of the coded picture

    int h263_long_vectors;      ///< use horrible H.263v1 long vector mode

    BlockDSPContext bdsp;

    FDCTDSPContext fdsp;

    H264ChromaContext h264chroma;

    HpelDSPContext hdsp;

    IDCTDSPContext idsp;

    MECmpContext mecc;

    MpegvideoEncDSPContext mpvencdsp;

    PixblockDSPContext pdsp;

    QpelDSPContext qdsp;

    VideoDSPContext vdsp;

    H263DSPContext h263dsp;

    int f_code;                 ///< forward MV resolution

    int b_code;                 ///< backward MV resolution for B-frames (MPEG-4)

    int16_t (*p_mv_table_base)[2];

    int16_t (*b_forw_mv_table_base)[2];

    int16_t (*b_back_mv_table_base)[2];

    int16_t (*b_bidir_forw_mv_table_base)[2];

    int16_t (*b_bidir_back_mv_table_base)[2];

    int16_t (*b_direct_mv_table_base)[2];

    int16_t (*p_field_mv_table_base)[2];

    int16_t (*b_field_mv_table_base)[2];

    int16_t (*p_mv_table)[2];            ///< MV table (1MV per MB) P-frame encoding

    int16_t (*b_forw_mv_table)[2];       ///< MV table (1MV per MB) forward mode B-frame encoding

    int16_t (*b_back_mv_table)[2];       ///< MV table (1MV per MB) backward mode B-frame encoding

    int16_t (*b_bidir_forw_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding

    int16_t (*b_bidir_back_mv_table)[2]; ///< MV table (1MV per MB) bidir mode B-frame encoding

    int16_t (*b_direct_mv_table)[2];     ///< MV table (1MV per MB) direct mode B-frame encoding

    int16_t (*p_field_mv_table[2][2])[2];   ///< MV table (2MV per MB) interlaced P-frame encoding

    int16_t (*b_field_mv_table[2][2][2])[2];///< MV table (4MV per MB) interlaced B-frame encoding

    uint8_t (*p_field_select_table[2]);  ///< Only the first element is allocated

    uint8_t (*b_field_select_table[2][2]); ///< Only the first element is allocated

    /* The following fields are encoder-only */

    uint16_t *mb_var;           ///< Table for MB variances

    uint16_t *mc_mb_var;        ///< Table for motion compensated MB variances

    uint8_t *mb_mean;           ///< Table for MB luminance

    int64_t mb_var_sum;         ///< sum of MB variance for current frame

    int64_t mc_mb_var_sum;      ///< motion compensated MB variance for current frame

    uint64_t encoding_error[MPEGVIDEO_MAX_PLANES];

    int motion_est;                      ///< ME algorithm

    int me_penalty_compensation;

    int me_pre;                          ///< prepass for motion estimation

    int mv_dir;

#define MV_DIR_FORWARD   1

#define MV_DIR_BACKWARD  2

#define MV_DIRECT        4 ///< bidirectional mode where the difference equals the MV of the last P/S/I-Frame (MPEG-4)

    int mv_type;

#define MV_TYPE_16X16       0   ///< 1 vector for the whole mb

#define MV_TYPE_8X8         1   ///< 4 vectors (H.263, MPEG-4 4MV)

#define MV_TYPE_16X8        2   ///< 2 vectors, one per 16x8 block

#define MV_TYPE_FIELD       3   ///< 2 vectors, one per field

#define MV_TYPE_DMV         4   ///< 2 vectors, special mpeg2 Dual Prime Vectors

    /**motion vectors for a macroblock

       first coordinate : 0 = forward 1 = backward

       second "         : depend on type

       third  "         : 0 = x, 1 = y

*/

    int mv[2][4][2];

    int field_select[2][2];

    int last_mv[2][2][2];             ///< last MV, used for MV prediction in MPEG-1 & B-frame MPEG-4

    const uint8_t *fcode_tab;         ///< smallest fcode needed for each MV

    int16_t direct_scale_mv[2][64];   ///< precomputed to avoid divisions in ff_mpeg4_set_direct_mv

    MotionEstContext me;

    int no_rounding;  /**< apply no rounding to motion compensation (MPEG-4, msmpeg4, ...)

                        for B-frames rounding mode is always 0 */

    /* macroblock layer */

    int mb_x, mb_y;

    int mb_skip_run;

    int mb_intra;

    uint16_t *mb_type;  ///< Table for candidate MB types for encoding (defines in mpegutils.h)

    int block_index[6]; ///< index to current MB in block based arrays with edges

    int block_wrap[6];

    uint8_t *dest[3];

    int *mb_index2xy;        ///< mb_index -> mb_x + mb_y*mb_stride

    /** matrix transmitted in the bitstream */

    uint16_t intra_matrix[64];

    uint16_t chroma_intra_matrix[64];

    uint16_t inter_matrix[64];

    uint16_t chroma_inter_matrix[64];

    int intra_quant_bias;    ///< bias for the quantizer

    int inter_quant_bias;    ///< bias for the quantizer

    int min_qcoeff;          ///< minimum encodable coefficient

    int max_qcoeff;          ///< maximum encodable coefficient

    int ac_esc_length;       ///< num of bits needed to encode the longest esc

    uint8_t *intra_ac_vlc_length;

    uint8_t *intra_ac_vlc_last_length;

    uint8_t *intra_chroma_ac_vlc_length;

    uint8_t *intra_chroma_ac_vlc_last_length;

    uint8_t *inter_ac_vlc_length;

    uint8_t *inter_ac_vlc_last_length;

    uint8_t *luma_dc_vlc_length;

    int coded_score[12];

    /** precomputed matrix (combine qscale and DCT renorm) */

    int (*q_intra_matrix)[64];

    int (*q_chroma_intra_matrix)[64];

    int (*q_inter_matrix)[64];

    /** identical to the above but for MMX & these are not permutated, second 64 entries are bias*/

    uint16_t (*q_intra_matrix16)[2][64];

    uint16_t (*q_chroma_intra_matrix16)[2][64];

    uint16_t (*q_inter_matrix16)[2][64];

    /* noise reduction */

    int (*dct_error_sum)[64];

    int dct_count[2];

    uint16_t (*dct_offset)[64];

    /* bit rate control */

    int64_t total_bits;

    int frame_bits;                ///< bits used for the current frame

    int stuffing_bits;             ///< bits used for stuffing

    int next_lambda;               ///< next lambda used for retrying to encode a frame

    RateControlContext rc_context; ///< contains stuff only accessed in ratecontrol.c

    /* statistics, used for 2-pass encoding */

    int mv_bits;

    int header_bits;

    int i_tex_bits;

    int p_tex_bits;

    int i_count;

    int skip_count;

    int misc_bits; ///< cbp, mb_type

    int last_bits; ///< temp var used for calculating the above vars

    /* error concealment / resync */

    int resync_mb_x;                 ///< x position of last resync marker

    int resync_mb_y;                 ///< y position of last resync marker

    GetBitContext last_resync_gb;    ///< used to search for the next resync marker

    int mb_num_left;                 ///< number of MBs left in this video packet (for partitioned Slices only)

    /* H.263 specific */

    int gob_index;

    int obmc;                       ///< overlapped block motion compensation

    int mb_info;                    ///< interval for outputting info about mb offsets as side data

    int prev_mb_info, last_mb_info;

    uint8_t *mb_info_ptr;

    int mb_info_size;

    int ehc_mode;

    /* H.263+ specific */

    int umvplus;                    ///< == H.263+ && unrestricted_mv

    int h263_aic_dir;               ///< AIC direction: 0 = left, 1 = top

    int h263_slice_structured;

    int alt_inter_vlc;              ///< alternative inter vlc

    int modified_quant;

    int loop_filter;

    int custom_pcf;

    /* MPEG-4 specific */

    int studio_profile;

    int dct_precision;

    ///< number of bits to represent the fractional part of time (encoder only)

    int time_increment_bits;

    int last_time_base;

    int time_base;                  ///< time in seconds of last I,P,S Frame

    int64_t time;                   ///< time of current frame

    int64_t last_non_b_time;

    uint16_t pp_time;               ///< time distance between the last 2 p,s,i frames

    uint16_t pb_time;               ///< time distance between the last b and p,s,i frame

    uint16_t pp_field_time;

    uint16_t pb_field_time;         ///< like above, just for interlaced

    int mcsel;

    int quant_precision;

    int quarter_sample;              ///< 1->qpel, 0->half pel ME/MC

    int data_partitioning;           ///< data partitioning flag from header

    int partitioned_frame;           ///< is current frame partitioned

    int low_delay;                   ///< no reordering needed / has no B-frames

    PutBitContext tex_pb;            ///< used for data partitioned VOPs

    PutBitContext pb2;               ///< used for data partitioned VOPs

    int mpeg_quant;

    int padding_bug_score;             ///< used to detect the VERY common padding bug in MPEG-4

    /* divx specific, used to workaround (many) bugs in divx5 */

    int divx_packed;

    uint8_t *bitstream_buffer; //Divx 5.01 puts several frames in a single one, this is used to reorder them

    int bitstream_buffer_size;

    unsigned int allocated_bitstream_buffer_size;

    /* RV10 specific */

    int rv10_version; ///< RV10 version: 0 or 3

    int rv10_first_dc_coded[3];

    /* MJPEG specific */

    struct MJpegContext *mjpeg_ctx;

    int esc_pos;

    /* MSMPEG4 specific */

    int mv_table_index;

    int rl_table_index;

    int rl_chroma_table_index;

    int dc_table_index;

    int use_skip_mb_code;

    int slice_height;      ///< in macroblocks

    int first_slice_line;  ///< used in MPEG-4 too to handle resync markers

    int flipflop_rounding;

    int msmpeg4_version;   ///< 0=not msmpeg4, 1=mp41, 2=mp42, 3=mp43/divx3 4=wmv1/7 5=wmv2/8

    int per_mb_rl_table;

    int esc3_level_length;

    int esc3_run_length;

    int inter_intra_pred;

    int mspel;

    /* decompression specific */

    GetBitContext gb;

    /* MPEG-1 specific */

    int last_mv_dir;         ///< last mv_dir, used for B-frame encoding

    int vbv_delay_pos;       ///< offset of vbv_delay in the bitstream

    /* MPEG-2-specific - I wished not to have to support this mess. */

    int progressive_sequence;

    int mpeg_f_code[2][2];

    // picture structure defines are loaded from mpegutils.h

    int picture_structure;

    int intra_dc_precision;

    int frame_pred_frame_dct;

    int top_field_first;

    int concealment_motion_vectors;

    int q_scale_type;

    int brd_scale;

    int intra_vlc_format;

    int alternate_scan;

    int repeat_first_field;

    int chroma_420_type;

    int chroma_format;

#define CHROMA_420 1

#define CHROMA_422 2

#define CHROMA_444 3

    int chroma_x_shift;//depend on pix_format, that depend on chroma_format

    int chroma_y_shift;

    int progressive_frame;

    int full_pel[2];

    int interlaced_dct;

    int first_field;         ///< is 1 for the first field of a field picture 0 otherwise

    /* RTP specific */

    int rtp_mode;

    int rtp_payload_size;

    uint8_t *ptr_lastgob;

    int16_t (*pblocks[12])[64];

    int16_t (*block)[64]; ///< points to one of the following blocks

    int16_t (*blocks)[12][64]; // for HQ mode we need to keep the best block

    int (*decode_mb)(struct MpegEncContext *s, int16_t block[12][64]); // used by some codecs to avoid a switch()

#define SLICE_OK         0

#define SLICE_ERROR     -1

#define SLICE_END       -2 ///<end marker found

#define SLICE_NOEND     -3 ///<no end marker or error found but mb count exceeded

    void (*dct_unquantize_mpeg1_intra)(struct MpegEncContext *s,

                           int16_t *block/*align 16*/, int n, int qscale);

    void (*dct_unquantize_mpeg1_inter)(struct MpegEncContext *s,

                           int16_t *block/*align 16*/, int n, int qscale);

    void (*dct_unquantize_mpeg2_intra)(struct MpegEncContext *s,

                           int16_t *block/*align 16*/, int n, int qscale);

    void (*dct_unquantize_mpeg2_inter)(struct MpegEncContext *s,

                           int16_t *block/*align 16*/, int n, int qscale);

    void (*dct_unquantize_h263_intra)(struct MpegEncContext *s,

                           int16_t *block/*align 16*/, int n, int qscale);

    void (*dct_unquantize_h263_inter)(struct MpegEncContext *s,

                           int16_t *block/*align 16*/, int n, int qscale);

    void (*dct_unquantize_intra)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)

                           int16_t *block/*align 16*/, int n, int qscale);

    void (*dct_unquantize_inter)(struct MpegEncContext *s, // unquantizer to use (MPEG-4 can use both)

                           int16_t *block/*align 16*/, int n, int qscale);

    int (*dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);

    int (*fast_dct_quantize)(struct MpegEncContext *s, int16_t *block/*align 16*/, int n, int qscale, int *overflow);

    void (*denoise_dct)(struct MpegEncContext *s, int16_t *block);

    int mpv_flags;      ///< flags set by private options

    int quantizer_noise_shaping;

/**

     * ratecontrol qmin qmax limiting method

     * 0-> clipping, 1-> use a nice continuous function to limit qscale within qmin/qmax.

*/

    float rc_qsquish;

    float rc_qmod_amp;

    int   rc_qmod_freq;

    float rc_initial_cplx;

    float rc_buffer_aggressivity;

    float border_masking;

    int lmin, lmax;

    int vbv_ignore_qmax;

    char *rc_eq;

    /* temp buffers for rate control */

    float *cplx_tab, *bits_tab;

    /* flag to indicate a reinitialization is required, e.g. after

     * a frame size change */

    int context_reinit;

    ERContext er;

    int error_rate;

    /* temporary frames used by b_frame_strategy = 2 */

    AVFrame *tmp_frames[MAX_B_FRAMES + 2];

    int b_frame_strategy;

    int b_sensitivity;

    /* frame skip options for encoding */

    int frame_skip_threshold;

    int frame_skip_factor;

    int frame_skip_exp;

    int frame_skip_cmp;

    int scenechange_threshold;

    int noise_reduction;

    int intra_penalty;

} MpegEncContext;

/**

 * Set the given MpegEncContext to common defaults (same for encoding

 * and decoding).  The changed fields will not depend upon the prior

 * state of the MpegEncContext.

*/

void ff_mpv_common_defaults(MpegEncContext *s);

int ff_mpv_common_init(MpegEncContext *s);

void ff_mpv_common_init_arm(MpegEncContext *s);

void ff_mpv_common_init_axp(MpegEncContext *s);

void ff_mpv_common_init_neon(MpegEncContext *s);

void ff_mpv_common_init_ppc(MpegEncContext *s);

void ff_mpv_common_init_x86(MpegEncContext *s);

void ff_mpv_common_init_mips(MpegEncContext *s);

/**

 * Initialize an MpegEncContext's thread contexts. Presumes that

 * slice_context_count is already set and that all the fields

 * that are freed/reset in free_duplicate_context() are NULL.

*/

int ff_mpv_init_duplicate_contexts(MpegEncContext *s);

/**

 * Initialize and allocates MpegEncContext fields dependent on the resolution.

*/

int ff_mpv_init_context_frame(MpegEncContext *s);

/**

 * Frees and resets MpegEncContext fields depending on the resolution

 * as well as the slice thread contexts.

 * Is used during resolution changes to avoid a full reinitialization of the

 * codec.

*/

void ff_mpv_free_context_frame(MpegEncContext *s);

void ff_mpv_common_end(MpegEncContext *s);

void ff_clean_intra_table_entries(MpegEncContext *s);

int ff_update_duplicate_context(MpegEncContext *dst, const MpegEncContext *src);

void ff_set_qscale(MpegEncContext * s, int qscale);

void ff_mpv_idct_init(MpegEncContext *s);

void ff_init_scantable(const uint8_t *permutation, ScanTable *st,

                       const uint8_t *src_scantable);

void ff_init_block_index(MpegEncContext *s);

void ff_mpv_motion(MpegEncContext *s,

                   uint8_t *dest_y, uint8_t *dest_cb,

                   uint8_t *dest_cr, int dir,

                   uint8_t *const *ref_picture,

                   op_pixels_func (*pix_op)[4],

                   qpel_mc_func (*qpix_op)[16]);

static inline void ff_update_block_index(MpegEncContext *s, int bits_per_raw_sample,

                                         int lowres, int chroma_x_shift)

    const int bytes_per_pixel = 1 + (bits_per_raw_sample > 8);

    const int block_size = (8 * bytes_per_pixel) >> lowres;

    s->block_index[0]+=2;

    s->block_index[1]+=2;

    s->block_index[2]+=2;

    s->block_index[3]+=2;

    s->block_index[4]++;

    s->block_index[5]++;

    s->dest[0]+= 2*block_size;

    s->dest[1] += (2 >> chroma_x_shift) * block_size;

    s->dest[2] += (2 >> chroma_x_shift) * block_size;

#endif /* AVCODEC_MPEGVIDEO_H */

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