mpegvideo: convert mpegvideo_common.h to a .c file

This file defines a single, huge function, MPV_motion(), which
although being declared inline is not actually inlined by the
compiler (for good reason).  There is thus no sense in defining
this function in a header file, resulting in multiple copies of
it in the final library.

Signed-off-by: Mans Rullgard <mans@mansr.com>

1 files changed, 875 insertions, 0 deletions

diff --git a/libavcodec/mpegvideo_motion.c b/libavcodec/mpegvideo_motion.c
new file mode 100644
index 0000000000..ea0695323b
--- /dev/null
+++ b/libavcodec/mpegvideo_motion.c
@@ -0,0 +1,875 @@
+/*
+ * Copyright (c) 2000,2001 Fabrice Bellard
+ * Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
+ *
+ * 4MV & hq & B-frame encoding stuff by Michael Niedermayer <michaelni@gmx.at>
+ *
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <string.h>
+#include "avcodec.h"
+#include "dsputil.h"
+#include "mpegvideo.h"
+#include "mjpegenc.h"
+#include "msmpeg4.h"
+#include <limits.h>
+
+static inline void gmc1_motion(MpegEncContext *s,
+                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
+                               uint8_t **ref_picture)
+{
+    uint8_t *ptr;
+    int offset, src_x, src_y, linesize, uvlinesize;
+    int motion_x, motion_y;
+    int emu=0;
+
+    motion_x= s->sprite_offset[0][0];
+    motion_y= s->sprite_offset[0][1];
+    src_x = s->mb_x * 16 + (motion_x >> (s->sprite_warping_accuracy+1));
+    src_y = s->mb_y * 16 + (motion_y >> (s->sprite_warping_accuracy+1));
+    motion_x<<=(3-s->sprite_warping_accuracy);
+    motion_y<<=(3-s->sprite_warping_accuracy);
+    src_x = av_clip(src_x, -16, s->width);
+    if (src_x == s->width)
+        motion_x =0;
+    src_y = av_clip(src_y, -16, s->height);
+    if (src_y == s->height)
+        motion_y =0;
+
+    linesize = s->linesize;
+    uvlinesize = s->uvlinesize;
+
+    ptr = ref_picture[0] + (src_y * linesize) + src_x;
+
+    if(s->flags&CODEC_FLAG_EMU_EDGE){
+        if(   (unsigned)src_x >= FFMAX(s->h_edge_pos - 17, 0)
+           || (unsigned)src_y >= FFMAX(s->v_edge_pos - 17, 0)){
+            s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, linesize, 17, 17, src_x, src_y, s->h_edge_pos, s->v_edge_pos);
+            ptr= s->edge_emu_buffer;
+        }
+    }
+
+    if((motion_x|motion_y)&7){
+        s->dsp.gmc1(dest_y  , ptr  , linesize, 16, motion_x&15, motion_y&15, 128 - s->no_rounding);
+        s->dsp.gmc1(dest_y+8, ptr+8, linesize, 16, motion_x&15, motion_y&15, 128 - s->no_rounding);
+    }else{
+        int dxy;
+
+        dxy= ((motion_x>>3)&1) | ((motion_y>>2)&2);
+        if (s->no_rounding){
+            s->dsp.put_no_rnd_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);
+        }else{
+            s->dsp.put_pixels_tab       [0][dxy](dest_y, ptr, linesize, 16);
+        }
+    }
+
+    if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
+
+    motion_x= s->sprite_offset[1][0];
+    motion_y= s->sprite_offset[1][1];
+    src_x = s->mb_x * 8 + (motion_x >> (s->sprite_warping_accuracy+1));
+    src_y = s->mb_y * 8 + (motion_y >> (s->sprite_warping_accuracy+1));
+    motion_x<<=(3-s->sprite_warping_accuracy);
+    motion_y<<=(3-s->sprite_warping_accuracy);
+    src_x = av_clip(src_x, -8, s->width>>1);
+    if (src_x == s->width>>1)
+        motion_x =0;
+    src_y = av_clip(src_y, -8, s->height>>1);
+    if (src_y == s->height>>1)
+        motion_y =0;
+
+    offset = (src_y * uvlinesize) + src_x;
+    ptr = ref_picture[1] + offset;
+    if(s->flags&CODEC_FLAG_EMU_EDGE){
+        if(   (unsigned)src_x >= FFMAX((s->h_edge_pos>>1) - 9, 0)
+           || (unsigned)src_y >= FFMAX((s->v_edge_pos>>1) - 9, 0)){
+            s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, uvlinesize, 9, 9, src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
+            ptr= s->edge_emu_buffer;
+            emu=1;
+        }
+    }
+    s->dsp.gmc1(dest_cb, ptr, uvlinesize, 8, motion_x&15, motion_y&15, 128 - s->no_rounding);
+
+    ptr = ref_picture[2] + offset;
+    if(emu){
+        s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, uvlinesize, 9, 9, src_x, src_y, s->h_edge_pos>>1, s->v_edge_pos>>1);
+        ptr= s->edge_emu_buffer;
+    }
+    s->dsp.gmc1(dest_cr, ptr, uvlinesize, 8, motion_x&15, motion_y&15, 128 - s->no_rounding);
+
+    return;
+}
+
+static inline void gmc_motion(MpegEncContext *s,
+                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
+                               uint8_t **ref_picture)
+{
+    uint8_t *ptr;
+    int linesize, uvlinesize;
+    const int a= s->sprite_warping_accuracy;
+    int ox, oy;
+
+    linesize = s->linesize;
+    uvlinesize = s->uvlinesize;
+
+    ptr = ref_picture[0];
+
+    ox= s->sprite_offset[0][0] + s->sprite_delta[0][0]*s->mb_x*16 + s->sprite_delta[0][1]*s->mb_y*16;
+    oy= s->sprite_offset[0][1] + s->sprite_delta[1][0]*s->mb_x*16 + s->sprite_delta[1][1]*s->mb_y*16;
+
+    s->dsp.gmc(dest_y, ptr, linesize, 16,
+           ox,
+           oy,
+           s->sprite_delta[0][0], s->sprite_delta[0][1],
+           s->sprite_delta[1][0], s->sprite_delta[1][1],
+           a+1, (1<<(2*a+1)) - s->no_rounding,
+           s->h_edge_pos, s->v_edge_pos);
+    s->dsp.gmc(dest_y+8, ptr, linesize, 16,
+           ox + s->sprite_delta[0][0]*8,
+           oy + s->sprite_delta[1][0]*8,
+           s->sprite_delta[0][0], s->sprite_delta[0][1],
+           s->sprite_delta[1][0], s->sprite_delta[1][1],
+           a+1, (1<<(2*a+1)) - s->no_rounding,
+           s->h_edge_pos, s->v_edge_pos);
+
+    if(CONFIG_GRAY && s->flags&CODEC_FLAG_GRAY) return;
+
+    ox= s->sprite_offset[1][0] + s->sprite_delta[0][0]*s->mb_x*8 + s->sprite_delta[0][1]*s->mb_y*8;
+    oy= s->sprite_offset[1][1] + s->sprite_delta[1][0]*s->mb_x*8 + s->sprite_delta[1][1]*s->mb_y*8;
+
+    ptr = ref_picture[1];
+    s->dsp.gmc(dest_cb, ptr, uvlinesize, 8,
+           ox,
+           oy,
+           s->sprite_delta[0][0], s->sprite_delta[0][1],
+           s->sprite_delta[1][0], s->sprite_delta[1][1],
+           a+1, (1<<(2*a+1)) - s->no_rounding,
+           s->h_edge_pos>>1, s->v_edge_pos>>1);
+
+    ptr = ref_picture[2];
+    s->dsp.gmc(dest_cr, ptr, uvlinesize, 8,
+           ox,
+           oy,
+           s->sprite_delta[0][0], s->sprite_delta[0][1],
+           s->sprite_delta[1][0], s->sprite_delta[1][1],
+           a+1, (1<<(2*a+1)) - s->no_rounding,
+           s->h_edge_pos>>1, s->v_edge_pos>>1);
+}
+
+static inline int hpel_motion(MpegEncContext *s,
+                                  uint8_t *dest, uint8_t *src,
+                                  int field_based, int field_select,
+                                  int src_x, int src_y,
+                                  int width, int height, int stride,
+                                  int h_edge_pos, int v_edge_pos,
+                                  int w, int h, op_pixels_func *pix_op,
+                                  int motion_x, int motion_y)
+{
+    int dxy;
+    int emu=0;
+
+    dxy = ((motion_y & 1) << 1) | (motion_x & 1);
+    src_x += motion_x >> 1;
+    src_y += motion_y >> 1;
+
+    /* WARNING: do no forget half pels */
+    src_x = av_clip(src_x, -16, width); //FIXME unneeded for emu?
+    if (src_x == width)
+        dxy &= ~1;
+    src_y = av_clip(src_y, -16, height);
+    if (src_y == height)
+        dxy &= ~2;
+    src += src_y * stride + src_x;
+
+    if(s->unrestricted_mv && (s->flags&CODEC_FLAG_EMU_EDGE)){
+        if(   (unsigned)src_x > FFMAX(h_edge_pos - (motion_x&1) - w, 0)
+           || (unsigned)src_y > FFMAX(v_edge_pos - (motion_y&1) - h, 0)){
+            s->dsp.emulated_edge_mc(s->edge_emu_buffer, src, s->linesize, w+1, (h+1)<<field_based,
+                             src_x, src_y<<field_based, h_edge_pos, s->v_edge_pos);
+            src= s->edge_emu_buffer;
+            emu=1;
+        }
+    }
+    if(field_select)
+        src += s->linesize;
+    pix_op[dxy](dest, src, stride, h);
+    return emu;
+}
+
+static av_always_inline
+void mpeg_motion_internal(MpegEncContext *s,
+                 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
+                 int field_based, int bottom_field, int field_select,
+                 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
+                 int motion_x, int motion_y, int h, int is_mpeg12, int mb_y)
+{
+    uint8_t *ptr_y, *ptr_cb, *ptr_cr;
+    int dxy, uvdxy, mx, my, src_x, src_y,
+        uvsrc_x, uvsrc_y, v_edge_pos, uvlinesize, linesize;
+
+#if 0
+if(s->quarter_sample)
+{
+    motion_x>>=1;
+    motion_y>>=1;
+}
+#endif
+
+    v_edge_pos = s->v_edge_pos >> field_based;
+    linesize   = s->current_picture.f.linesize[0] << field_based;
+    uvlinesize = s->current_picture.f.linesize[1] << field_based;
+
+    dxy = ((motion_y & 1) << 1) | (motion_x & 1);
+    src_x = s->mb_x* 16               + (motion_x >> 1);
+    src_y =(   mb_y<<(4-field_based)) + (motion_y >> 1);
+
+    if (!is_mpeg12 && s->out_format == FMT_H263) {
+        if((s->workaround_bugs & FF_BUG_HPEL_CHROMA) && field_based){
+            mx = (motion_x>>1)|(motion_x&1);
+            my = motion_y >>1;
+            uvdxy = ((my & 1) << 1) | (mx & 1);
+            uvsrc_x = s->mb_x* 8               + (mx >> 1);
+            uvsrc_y =(   mb_y<<(3-field_based))+ (my >> 1);
+        }else{
+            uvdxy = dxy | (motion_y & 2) | ((motion_x & 2) >> 1);
+            uvsrc_x = src_x>>1;
+            uvsrc_y = src_y>>1;
+        }
+    }else if(!is_mpeg12 && s->out_format == FMT_H261){//even chroma mv's are full pel in H261
+        mx = motion_x / 4;
+        my = motion_y / 4;
+        uvdxy = 0;
+        uvsrc_x = s->mb_x*8 + mx;
+        uvsrc_y =    mb_y*8 + my;
+    } else {
+        if(s->chroma_y_shift){
+            mx = motion_x / 2;
+            my = motion_y / 2;
+            uvdxy = ((my & 1) << 1) | (mx & 1);
+            uvsrc_x = s->mb_x* 8               + (mx >> 1);
+            uvsrc_y =(   mb_y<<(3-field_based))+ (my >> 1);
+        } else {
+            if(s->chroma_x_shift){
+            //Chroma422
+                mx = motion_x / 2;
+                uvdxy = ((motion_y & 1) << 1) | (mx & 1);
+                uvsrc_x = s->mb_x* 8           + (mx >> 1);
+                uvsrc_y = src_y;
+            } else {
+            //Chroma444
+                uvdxy = dxy;
+                uvsrc_x = src_x;
+                uvsrc_y = src_y;
+            }
+        }
+    }
+
+    ptr_y  = ref_picture[0] + src_y * linesize + src_x;
+    ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
+    ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
+
+    if(   (unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x&1) - 16, 0)
+       || (unsigned)src_y > FFMAX(   v_edge_pos - (motion_y&1) - h , 0)){
+            if(is_mpeg12 || s->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
+               s->codec_id == AV_CODEC_ID_MPEG1VIDEO){
+                av_log(s->avctx,AV_LOG_DEBUG,
+                        "MPEG motion vector out of boundary (%d %d)\n", src_x, src_y);
+                return;
+            }
+            s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr_y, s->linesize,
+                                17, 17+field_based,
+                                src_x, src_y<<field_based,
+                                s->h_edge_pos, s->v_edge_pos);
+            ptr_y = s->edge_emu_buffer;
+            if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+                uint8_t *uvbuf= s->edge_emu_buffer+18*s->linesize;
+                s->dsp.emulated_edge_mc(uvbuf ,
+                                    ptr_cb, s->uvlinesize,
+                                    9, 9+field_based,
+                                    uvsrc_x, uvsrc_y<<field_based,
+                                    s->h_edge_pos>>1, s->v_edge_pos>>1);
+                s->dsp.emulated_edge_mc(uvbuf+16,
+                                    ptr_cr, s->uvlinesize,
+                                    9, 9+field_based,
+                                    uvsrc_x, uvsrc_y<<field_based,
+                                    s->h_edge_pos>>1, s->v_edge_pos>>1);
+                ptr_cb= uvbuf;
+                ptr_cr= uvbuf+16;
+            }
+    }
+
+    if(bottom_field){ //FIXME use this for field pix too instead of the obnoxious hack which changes picture.data
+        dest_y += s->linesize;
+        dest_cb+= s->uvlinesize;
+        dest_cr+= s->uvlinesize;
+    }
+
+    if(field_select){
+        ptr_y += s->linesize;
+        ptr_cb+= s->uvlinesize;
+        ptr_cr+= s->uvlinesize;
+    }
+
+    pix_op[0][dxy](dest_y, ptr_y, linesize, h);
+
+    if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+        pix_op[s->chroma_x_shift][uvdxy]
+                (dest_cb, ptr_cb, uvlinesize, h >> s->chroma_y_shift);
+        pix_op[s->chroma_x_shift][uvdxy]
+                (dest_cr, ptr_cr, uvlinesize, h >> s->chroma_y_shift);
+    }
+    if(!is_mpeg12 && (CONFIG_H261_ENCODER || CONFIG_H261_DECODER) &&
+         s->out_format == FMT_H261){
+        ff_h261_loop_filter(s);
+    }
+}
+/* apply one mpeg motion vector to the three components */
+static av_always_inline
+void mpeg_motion(MpegEncContext *s,
+                 uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
+                 int field_based, int bottom_field, int field_select,
+                 uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
+                 int motion_x, int motion_y, int h, int mb_y)
+{
+#if !CONFIG_SMALL
+    if(s->out_format == FMT_MPEG1)
+        mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, field_based,
+                    bottom_field, field_select, ref_picture, pix_op,
+                    motion_x, motion_y, h, 1, mb_y);
+    else
+#endif
+        mpeg_motion_internal(s, dest_y, dest_cb, dest_cr, field_based,
+                    bottom_field, field_select, ref_picture, pix_op,
+                    motion_x, motion_y, h, 0, mb_y);
+}
+
+//FIXME move to dsputil, avg variant, 16x16 version
+static inline void put_obmc(uint8_t *dst, uint8_t *src[5], int stride){
+    int x;
+    uint8_t * const top   = src[1];
+    uint8_t * const left  = src[2];
+    uint8_t * const mid   = src[0];
+    uint8_t * const right = src[3];
+    uint8_t * const bottom= src[4];
+#define OBMC_FILTER(x, t, l, m, r, b)\
+    dst[x]= (t*top[x] + l*left[x] + m*mid[x] + r*right[x] + b*bottom[x] + 4)>>3
+#define OBMC_FILTER4(x, t, l, m, r, b)\
+    OBMC_FILTER(x         , t, l, m, r, b);\
+    OBMC_FILTER(x+1       , t, l, m, r, b);\
+    OBMC_FILTER(x  +stride, t, l, m, r, b);\
+    OBMC_FILTER(x+1+stride, t, l, m, r, b);
+
+    x=0;
+    OBMC_FILTER (x  , 2, 2, 4, 0, 0);
+    OBMC_FILTER (x+1, 2, 1, 5, 0, 0);
+    OBMC_FILTER4(x+2, 2, 1, 5, 0, 0);
+    OBMC_FILTER4(x+4, 2, 0, 5, 1, 0);
+    OBMC_FILTER (x+6, 2, 0, 5, 1, 0);
+    OBMC_FILTER (x+7, 2, 0, 4, 2, 0);
+    x+= stride;
+    OBMC_FILTER (x  , 1, 2, 5, 0, 0);
+    OBMC_FILTER (x+1, 1, 2, 5, 0, 0);
+    OBMC_FILTER (x+6, 1, 0, 5, 2, 0);
+    OBMC_FILTER (x+7, 1, 0, 5, 2, 0);
+    x+= stride;
+    OBMC_FILTER4(x  , 1, 2, 5, 0, 0);
+    OBMC_FILTER4(x+2, 1, 1, 6, 0, 0);
+    OBMC_FILTER4(x+4, 1, 0, 6, 1, 0);
+    OBMC_FILTER4(x+6, 1, 0, 5, 2, 0);
+    x+= 2*stride;
+    OBMC_FILTER4(x  , 0, 2, 5, 0, 1);
+    OBMC_FILTER4(x+2, 0, 1, 6, 0, 1);
+    OBMC_FILTER4(x+4, 0, 0, 6, 1, 1);
+    OBMC_FILTER4(x+6, 0, 0, 5, 2, 1);
+    x+= 2*stride;
+    OBMC_FILTER (x  , 0, 2, 5, 0, 1);
+    OBMC_FILTER (x+1, 0, 2, 5, 0, 1);
+    OBMC_FILTER4(x+2, 0, 1, 5, 0, 2);
+    OBMC_FILTER4(x+4, 0, 0, 5, 1, 2);
+    OBMC_FILTER (x+6, 0, 0, 5, 2, 1);
+    OBMC_FILTER (x+7, 0, 0, 5, 2, 1);
+    x+= stride;
+    OBMC_FILTER (x  , 0, 2, 4, 0, 2);
+    OBMC_FILTER (x+1, 0, 1, 5, 0, 2);
+    OBMC_FILTER (x+6, 0, 0, 5, 1, 2);
+    OBMC_FILTER (x+7, 0, 0, 4, 2, 2);
+}
+
+/* obmc for 1 8x8 luma block */
+static inline void obmc_motion(MpegEncContext *s,
+                               uint8_t *dest, uint8_t *src,
+                               int src_x, int src_y,
+                               op_pixels_func *pix_op,
+                               int16_t mv[5][2]/* mid top left right bottom*/)
+#define MID    0
+{
+    int i;
+    uint8_t *ptr[5];
+
+    assert(s->quarter_sample==0);
+
+    for(i=0; i<5; i++){
+        if(i && mv[i][0]==mv[MID][0] && mv[i][1]==mv[MID][1]){
+            ptr[i]= ptr[MID];
+        }else{
+            ptr[i]= s->obmc_scratchpad + 8*(i&1) + s->linesize*8*(i>>1);
+            hpel_motion(s, ptr[i], src, 0, 0,
+                        src_x, src_y,
+                        s->width, s->height, s->linesize,
+                        s->h_edge_pos, s->v_edge_pos,
+                        8, 8, pix_op,
+                        mv[i][0], mv[i][1]);
+        }
+    }
+
+    put_obmc(dest, ptr, s->linesize);
+}
+
+static inline void qpel_motion(MpegEncContext *s,
+                               uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
+                               int field_based, int bottom_field, int field_select,
+                               uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
+                               qpel_mc_func (*qpix_op)[16],
+                               int motion_x, int motion_y, int h)
+{
+    uint8_t *ptr_y, *ptr_cb, *ptr_cr;
+    int dxy, uvdxy, mx, my, src_x, src_y, uvsrc_x, uvsrc_y, v_edge_pos, linesize, uvlinesize;
+
+    dxy = ((motion_y & 3) << 2) | (motion_x & 3);
+    src_x = s->mb_x *  16                 + (motion_x >> 2);
+    src_y = s->mb_y * (16 >> field_based) + (motion_y >> 2);
+
+    v_edge_pos = s->v_edge_pos >> field_based;
+    linesize = s->linesize << field_based;
+    uvlinesize = s->uvlinesize << field_based;
+
+    if(field_based){
+        mx= motion_x/2;
+        my= motion_y>>1;
+    }else if(s->workaround_bugs&FF_BUG_QPEL_CHROMA2){
+        static const int rtab[8]= {0,0,1,1,0,0,0,1};
+        mx= (motion_x>>1) + rtab[motion_x&7];
+        my= (motion_y>>1) + rtab[motion_y&7];
+    }else if(s->workaround_bugs&FF_BUG_QPEL_CHROMA){
+        mx= (motion_x>>1)|(motion_x&1);
+        my= (motion_y>>1)|(motion_y&1);
+    }else{
+        mx= motion_x/2;
+        my= motion_y/2;
+    }
+    mx= (mx>>1)|(mx&1);
+    my= (my>>1)|(my&1);
+
+    uvdxy= (mx&1) | ((my&1)<<1);
+    mx>>=1;
+    my>>=1;
+
+    uvsrc_x = s->mb_x *  8                 + mx;
+    uvsrc_y = s->mb_y * (8 >> field_based) + my;
+
+    ptr_y  = ref_picture[0] +   src_y *   linesize +   src_x;
+    ptr_cb = ref_picture[1] + uvsrc_y * uvlinesize + uvsrc_x;
+    ptr_cr = ref_picture[2] + uvsrc_y * uvlinesize + uvsrc_x;
+
+    if(   (unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x&3) - 16, 0)
+       || (unsigned)src_y > FFMAX(   v_edge_pos - (motion_y&3) - h , 0)){
+        s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr_y, s->linesize,
+                            17, 17+field_based, src_x, src_y<<field_based,
+                            s->h_edge_pos, s->v_edge_pos);
+        ptr_y= s->edge_emu_buffer;
+        if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+            uint8_t *uvbuf= s->edge_emu_buffer + 18*s->linesize;
+            s->dsp.emulated_edge_mc(uvbuf, ptr_cb, s->uvlinesize,
+                                9, 9 + field_based,
+                                uvsrc_x, uvsrc_y<<field_based,
+                                s->h_edge_pos>>1, s->v_edge_pos>>1);
+            s->dsp.emulated_edge_mc(uvbuf + 16, ptr_cr, s->uvlinesize,
+                                9, 9 + field_based,
+                                uvsrc_x, uvsrc_y<<field_based,
+                                s->h_edge_pos>>1, s->v_edge_pos>>1);
+            ptr_cb= uvbuf;
+            ptr_cr= uvbuf + 16;
+        }
+    }
+
+    if(!field_based)
+        qpix_op[0][dxy](dest_y, ptr_y, linesize);
+    else{
+        if(bottom_field){
+            dest_y += s->linesize;
+            dest_cb+= s->uvlinesize;
+            dest_cr+= s->uvlinesize;
+        }
+
+        if(field_select){
+            ptr_y  += s->linesize;
+            ptr_cb += s->uvlinesize;
+            ptr_cr += s->uvlinesize;
+        }
+        //damn interlaced mode
+        //FIXME boundary mirroring is not exactly correct here
+        qpix_op[1][dxy](dest_y  , ptr_y  , linesize);
+        qpix_op[1][dxy](dest_y+8, ptr_y+8, linesize);
+    }
+    if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY)){
+        pix_op[1][uvdxy](dest_cr, ptr_cr, uvlinesize, h >> 1);
+        pix_op[1][uvdxy](dest_cb, ptr_cb, uvlinesize, h >> 1);
+    }
+}
+
+/**
+ * h263 chroma 4mv motion compensation.
+ */
+static inline void chroma_4mv_motion(MpegEncContext *s,
+                                     uint8_t *dest_cb, uint8_t *dest_cr,
+                                     uint8_t **ref_picture,
+                                     op_pixels_func *pix_op,
+                                     int mx, int my){
+    int dxy, emu=0, src_x, src_y, offset;
+    uint8_t *ptr;
+
+    /* In case of 8X8, we construct a single chroma motion vector
+       with a special rounding */
+    mx= ff_h263_round_chroma(mx);
+    my= ff_h263_round_chroma(my);
+
+    dxy = ((my & 1) << 1) | (mx & 1);
+    mx >>= 1;
+    my >>= 1;
+
+    src_x = s->mb_x * 8 + mx;
+    src_y = s->mb_y * 8 + my;
+    src_x = av_clip(src_x, -8, (s->width >> 1));
+    if (src_x == (s->width >> 1))
+        dxy &= ~1;
+    src_y = av_clip(src_y, -8, (s->height >> 1));
+    if (src_y == (s->height >> 1))
+        dxy &= ~2;
+
+    offset = src_y * s->uvlinesize + src_x;
+    ptr = ref_picture[1] + offset;
+    if(s->flags&CODEC_FLAG_EMU_EDGE){
+        if(   (unsigned)src_x > FFMAX((s->h_edge_pos>>1) - (dxy &1) - 8, 0)
+           || (unsigned)src_y > FFMAX((s->v_edge_pos>>1) - (dxy>>1) - 8, 0)){
+            s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize,
+                                9, 9, src_x, src_y,
+                                s->h_edge_pos>>1, s->v_edge_pos>>1);
+            ptr= s->edge_emu_buffer;
+            emu=1;
+        }
+    }
+    pix_op[dxy](dest_cb, ptr, s->uvlinesize, 8);
+
+    ptr = ref_picture[2] + offset;
+    if(emu){
+        s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr, s->uvlinesize,
+                            9, 9, src_x, src_y,
+                            s->h_edge_pos>>1, s->v_edge_pos>>1);
+        ptr= s->edge_emu_buffer;
+    }
+    pix_op[dxy](dest_cr, ptr, s->uvlinesize, 8);
+}
+
+static inline void prefetch_motion(MpegEncContext *s, uint8_t **pix, int dir){
+    /* fetch pixels for estimated mv 4 macroblocks ahead
+     * optimized for 64byte cache lines */
+    const int shift = s->quarter_sample ? 2 : 1;
+    const int mx= (s->mv[dir][0][0]>>shift) + 16*s->mb_x + 8;
+    const int my= (s->mv[dir][0][1]>>shift) + 16*s->mb_y;
+    int off= mx + (my + (s->mb_x&3)*4)*s->linesize + 64;
+    s->dsp.prefetch(pix[0]+off, s->linesize, 4);
+    off= (mx>>1) + ((my>>1) + (s->mb_x&7))*s->uvlinesize + 64;
+    s->dsp.prefetch(pix[1]+off, pix[2]-pix[1], 2);
+}
+
+/**
+ * motion compensation of a single macroblock
+ * @param s context
+ * @param dest_y luma destination pointer
+ * @param dest_cb chroma cb/u destination pointer
+ * @param dest_cr chroma cr/v destination pointer
+ * @param dir direction (0->forward, 1->backward)
+ * @param ref_picture array[3] of pointers to the 3 planes of the reference picture
+ * @param pix_op halfpel motion compensation function (average or put normally)
+ * @param qpix_op qpel motion compensation function (average or put normally)
+ * the motion vectors are taken from s->mv and the MV type from s->mv_type
+ */
+static av_always_inline void MPV_motion_internal(MpegEncContext *s,
+                              uint8_t *dest_y, uint8_t *dest_cb,
+                              uint8_t *dest_cr, int dir,
+                              uint8_t **ref_picture,
+                              op_pixels_func (*pix_op)[4],
+                              qpel_mc_func (*qpix_op)[16], int is_mpeg12)
+{
+    int dxy, mx, my, src_x, src_y, motion_x, motion_y;
+    int mb_x, mb_y, i;
+    uint8_t *ptr, *dest;
+
+    mb_x = s->mb_x;
+    mb_y = s->mb_y;
+
+    prefetch_motion(s, ref_picture, dir);
+
+    if(!is_mpeg12 && s->obmc && s->pict_type != AV_PICTURE_TYPE_B){
+        int16_t mv_cache[4][4][2];
+        const int xy= s->mb_x + s->mb_y*s->mb_stride;
+        const int mot_stride= s->b8_stride;
+        const int mot_xy= mb_x*2 + mb_y*2*mot_stride;
+
+        assert(!s->mb_skipped);
+
+        memcpy(mv_cache[1][1], s->current_picture.f.motion_val[0][mot_xy             ], sizeof(int16_t) * 4);
+        memcpy(mv_cache[2][1], s->current_picture.f.motion_val[0][mot_xy + mot_stride], sizeof(int16_t) * 4);
+        memcpy(mv_cache[3][1], s->current_picture.f.motion_val[0][mot_xy + mot_stride], sizeof(int16_t) * 4);
+
+        if (mb_y == 0 || IS_INTRA(s->current_picture.f.mb_type[xy - s->mb_stride])) {
+            memcpy(mv_cache[0][1], mv_cache[1][1], sizeof(int16_t)*4);
+        }else{
+            memcpy(mv_cache[0][1], s->current_picture.f.motion_val[0][mot_xy - mot_stride], sizeof(int16_t) * 4);
+        }
+
+        if (mb_x == 0 || IS_INTRA(s->current_picture.f.mb_type[xy - 1])) {
+            AV_COPY32(mv_cache[1][0], mv_cache[1][1]);
+            AV_COPY32(mv_cache[2][0], mv_cache[2][1]);
+        }else{
+            AV_COPY32(mv_cache[1][0], s->current_picture.f.motion_val[0][mot_xy - 1]);
+            AV_COPY32(mv_cache[2][0], s->current_picture.f.motion_val[0][mot_xy - 1 + mot_stride]);
+        }
+
+        if (mb_x + 1 >= s->mb_width || IS_INTRA(s->current_picture.f.mb_type[xy + 1])) {
+            AV_COPY32(mv_cache[1][3], mv_cache[1][2]);
+            AV_COPY32(mv_cache[2][3], mv_cache[2][2]);
+        }else{
+            AV_COPY32(mv_cache[1][3], s->current_picture.f.motion_val[0][mot_xy + 2]);
+            AV_COPY32(mv_cache[2][3], s->current_picture.f.motion_val[0][mot_xy + 2 + mot_stride]);
+        }
+
+        mx = 0;
+        my = 0;
+        for(i=0;i<4;i++) {
+            const int x= (i&1)+1;
+            const int y= (i>>1)+1;
+            int16_t mv[5][2]= {
+                {mv_cache[y][x  ][0], mv_cache[y][x  ][1]},
+                {mv_cache[y-1][x][0], mv_cache[y-1][x][1]},
+                {mv_cache[y][x-1][0], mv_cache[y][x-1][1]},
+                {mv_cache[y][x+1][0], mv_cache[y][x+1][1]},
+                {mv_cache[y+1][x][0], mv_cache[y+1][x][1]}};
+            //FIXME cleanup
+            obmc_motion(s, dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,
+                        ref_picture[0],
+                        mb_x * 16 + (i & 1) * 8, mb_y * 16 + (i >>1) * 8,
+                        pix_op[1],
+                        mv);
+
+            mx += mv[0][0];
+            my += mv[0][1];
+        }
+        if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY))
+            chroma_4mv_motion(s, dest_cb, dest_cr, ref_picture, pix_op[1], mx, my);
+
+        return;
+    }
+
+    switch(s->mv_type) {
+    case MV_TYPE_16X16:
+        if(s->mcsel){
+            if(s->real_sprite_warping_points==1){
+                gmc1_motion(s, dest_y, dest_cb, dest_cr,
+                            ref_picture);
+            }else{
+                gmc_motion(s, dest_y, dest_cb, dest_cr,
+                            ref_picture);
+            }
+        }else if(!is_mpeg12 && s->quarter_sample){
+            qpel_motion(s, dest_y, dest_cb, dest_cr,
+                        0, 0, 0,
+                        ref_picture, pix_op, qpix_op,
+                        s->mv[dir][0][0], s->mv[dir][0][1], 16);
+        } else if (!is_mpeg12 && (CONFIG_WMV2_DECODER || CONFIG_WMV2_ENCODER) &&
+                   s->mspel && s->codec_id == AV_CODEC_ID_WMV2) {
+            ff_mspel_motion(s, dest_y, dest_cb, dest_cr,
+                        ref_picture, pix_op,
+                        s->mv[dir][0][0], s->mv[dir][0][1], 16);
+        }else
+        {
+            mpeg_motion(s, dest_y, dest_cb, dest_cr,
+                        0, 0, 0,
+                        ref_picture, pix_op,
+                        s->mv[dir][0][0], s->mv[dir][0][1], 16, mb_y);
+        }
+        break;
+    case MV_TYPE_8X8:
+    if (!is_mpeg12) {
+        mx = 0;
+        my = 0;
+        if(s->quarter_sample){
+            for(i=0;i<4;i++) {
+                motion_x = s->mv[dir][i][0];
+                motion_y = s->mv[dir][i][1];
+
+                dxy = ((motion_y & 3) << 2) | (motion_x & 3);
+                src_x = mb_x * 16 + (motion_x >> 2) + (i & 1) * 8;
+                src_y = mb_y * 16 + (motion_y >> 2) + (i >>1) * 8;
+
+                /* WARNING: do no forget half pels */
+                src_x = av_clip(src_x, -16, s->width);
+                if (src_x == s->width)
+                    dxy &= ~3;
+                src_y = av_clip(src_y, -16, s->height);
+                if (src_y == s->height)
+                    dxy &= ~12;
+
+                ptr = ref_picture[0] + (src_y * s->linesize) + (src_x);
+                if(s->flags&CODEC_FLAG_EMU_EDGE){
+                    if(   (unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x&3) - 8, 0)
+                       || (unsigned)src_y > FFMAX(s->v_edge_pos - (motion_y&3) - 8, 0)){
+                        s->dsp.emulated_edge_mc(s->edge_emu_buffer, ptr,
+                                            s->linesize, 9, 9,
+                                            src_x, src_y,
+                                            s->h_edge_pos, s->v_edge_pos);
+                        ptr= s->edge_emu_buffer;
+                    }
+                }
+                dest = dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize;
+                qpix_op[1][dxy](dest, ptr, s->linesize);
+
+                mx += s->mv[dir][i][0]/2;
+                my += s->mv[dir][i][1]/2;
+            }
+        }else{
+            for(i=0;i<4;i++) {
+                hpel_motion(s, dest_y + ((i & 1) * 8) + (i >> 1) * 8 * s->linesize,
+                            ref_picture[0], 0, 0,
+                            mb_x * 16 + (i & 1) * 8, mb_y * 16 + (i >>1) * 8,
+                            s->width, s->height, s->linesize,
+                            s->h_edge_pos, s->v_edge_pos,
+                            8, 8, pix_op[1],
+                            s->mv[dir][i][0], s->mv[dir][i][1]);
+
+                mx += s->mv[dir][i][0];
+                my += s->mv[dir][i][1];
+            }
+        }
+
+        if(!CONFIG_GRAY || !(s->flags&CODEC_FLAG_GRAY))
+            chroma_4mv_motion(s, dest_cb, dest_cr, ref_picture, pix_op[1], mx, my);
+    }
+        break;
+    case MV_TYPE_FIELD:
+        if (s->picture_structure == PICT_FRAME) {
+            if(!is_mpeg12 && s->quarter_sample){
+                for(i=0; i<2; i++){
+                    qpel_motion(s, dest_y, dest_cb, dest_cr,
+                                1, i, s->field_select[dir][i],
+                                ref_picture, pix_op, qpix_op,
+                                s->mv[dir][i][0], s->mv[dir][i][1], 8);
+                }
+            }else{
+                /* top field */
+                mpeg_motion(s, dest_y, dest_cb, dest_cr,
+                            1, 0, s->field_select[dir][0],
+                            ref_picture, pix_op,
+                            s->mv[dir][0][0], s->mv[dir][0][1], 8, mb_y);
+                /* bottom field */
+                mpeg_motion(s, dest_y, dest_cb, dest_cr,
+                            1, 1, s->field_select[dir][1],
+                            ref_picture, pix_op,
+                            s->mv[dir][1][0], s->mv[dir][1][1], 8, mb_y);
+            }
+        } else {
+            if(s->picture_structure != s->field_select[dir][0] + 1 && s->pict_type != AV_PICTURE_TYPE_B && !s->first_field){
+                ref_picture = s->current_picture_ptr->f.data;
+            }
+
+            mpeg_motion(s, dest_y, dest_cb, dest_cr,
+                        0, 0, s->field_select[dir][0],
+                        ref_picture, pix_op,
+                        s->mv[dir][0][0], s->mv[dir][0][1], 16, mb_y>>1);
+        }
+        break;
+    case MV_TYPE_16X8:
+        for(i=0; i<2; i++){
+            uint8_t ** ref2picture;
+
+            if(s->picture_structure == s->field_select[dir][i] + 1
+               || s->pict_type == AV_PICTURE_TYPE_B || s->first_field){
+                ref2picture= ref_picture;
+            }else{
+                ref2picture = s->current_picture_ptr->f.data;
+            }
+
+            mpeg_motion(s, dest_y, dest_cb, dest_cr,
+                        0, 0, s->field_select[dir][i],
+                        ref2picture, pix_op,
+                        s->mv[dir][i][0], s->mv[dir][i][1] + 16*i, 8, mb_y>>1);
+
+            dest_y += 16*s->linesize;
+            dest_cb+= (16>>s->chroma_y_shift)*s->uvlinesize;
+            dest_cr+= (16>>s->chroma_y_shift)*s->uvlinesize;
+        }
+        break;
+    case MV_TYPE_DMV:
+        if(s->picture_structure == PICT_FRAME){
+            for(i=0; i<2; i++){
+                int j;
+                for(j=0; j<2; j++){
+                    mpeg_motion(s, dest_y, dest_cb, dest_cr,
+                                1, j, j^i,
+                                ref_picture, pix_op,
+                                s->mv[dir][2*i + j][0], s->mv[dir][2*i + j][1], 8, mb_y);
+                }
+                pix_op = s->dsp.avg_pixels_tab;
+            }
+        }else{
+            for(i=0; i<2; i++){
+                mpeg_motion(s, dest_y, dest_cb, dest_cr,
+                            0, 0, s->picture_structure != i+1,
+                            ref_picture, pix_op,
+                            s->mv[dir][2*i][0],s->mv[dir][2*i][1],16, mb_y>>1);
+
+                // after put we make avg of the same block
+                pix_op=s->dsp.avg_pixels_tab;
+
+                //opposite parity is always in the same frame if this is second field
+                if(!s->first_field){
+                    ref_picture = s->current_picture_ptr->f.data;
+                }
+            }
+        }
+    break;
+    default: assert(0);
+    }
+}
+
+void ff_MPV_motion(MpegEncContext *s,
+                   uint8_t *dest_y, uint8_t *dest_cb,
+                   uint8_t *dest_cr, int dir,
+                   uint8_t **ref_picture,
+                   op_pixels_func (*pix_op)[4],
+                   qpel_mc_func (*qpix_op)[16])
+{
+#if !CONFIG_SMALL
+    if(s->out_format == FMT_MPEG1)
+        MPV_motion_internal(s, dest_y, dest_cb, dest_cr, dir,
+                            ref_picture, pix_op, qpix_op, 1);
+    else
+#endif
+        MPV_motion_internal(s, dest_y, dest_cb, dest_cr, dir,
+                            ref_picture, pix_op, qpix_op, 0);
+}