Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 617 insertions, 0 deletions

diff --git a/media/ffvpx/libavcodec/mpegvideo.h b/media/ffvpx/libavcodec/mpegvideo.h
new file mode 100644
index 0000000000..ccec0dd75f
--- /dev/null
+++ b/media/ffvpx/libavcodec/mpegvideo.h
@@ -0,0 +1,617 @@
+/*
+ * 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"
+#if FF_API_FLAG_TRUNCATED
+#include "parser.h"
+#endif
+#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 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)
+
+#if FF_API_FLAG_TRUNCATED
+    ParseContext parse_context;
+#endif
+
+    /* 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 */