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FFmpeg/libavcodec/mpegvideo_motion.c
Michael Niedermayer 136f552075 mpegvideo_motion: Handle edge emulation even without unrestricted_mv 
Fix out of bounds read.

Bug-Id: 962
Found by: F4B3CD@STARLAB and Agostino Sarubbo
Signed-off-by: Vittorio Giovara <vittorio.giovara@gmail.com>
2016-09-16 16:28:07 +02:00

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/*
* 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 "libavutil/internal.h"
#include "avcodec.h"
#include "h261.h"
#include "mpegutils.h"
#include "mpegvideo.h"
#include "mjpegenc.h"
#include "msmpeg4.h"
#include "qpeldsp.h"
#include "wmv2.h"
#include <limits.h>
static 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 src_x, src_y, motion_x, motion_y;
ptrdiff_t offset, linesize, uvlinesize;
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 ((unsigned)src_x >= FFMAX(s->h_edge_pos - 17, 0) ||
(unsigned)src_y >= FFMAX(s->v_edge_pos - 17, 0)) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
linesize, linesize,
17, 17,
src_x, src_y,
s->h_edge_pos, s->v_edge_pos);
ptr = s->sc.edge_emu_buffer;
}
if ((motion_x | motion_y) & 7) {
s->mdsp.gmc1(dest_y, ptr, linesize, 16,
motion_x & 15, motion_y & 15, 128 - s->no_rounding);
s->mdsp.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->hdsp.put_no_rnd_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);
} else {
s->hdsp.put_pixels_tab[0][dxy](dest_y, ptr, linesize, 16);
}
}
if (CONFIG_GRAY && s->avctx->flags & AV_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 ((unsigned)src_x >= FFMAX((s->h_edge_pos >> 1) - 9, 0) ||
(unsigned)src_y >= FFMAX((s->v_edge_pos >> 1) - 9, 0)) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
uvlinesize, uvlinesize,
9, 9,
src_x, src_y,
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
ptr = s->sc.edge_emu_buffer;
emu = 1;
}
s->mdsp.gmc1(dest_cb, ptr, uvlinesize, 8,
motion_x & 15, motion_y & 15, 128 - s->no_rounding);
ptr = ref_picture[2] + offset;
if (emu) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
uvlinesize, uvlinesize,
9, 9,
src_x, src_y,
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
ptr = s->sc.edge_emu_buffer;
}
s->mdsp.gmc1(dest_cr, ptr, uvlinesize, 8,
motion_x & 15, motion_y & 15, 128 - s->no_rounding);
}
static 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->mdsp.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->mdsp.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->avctx->flags & AV_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->mdsp.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->mdsp.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 src_x, int src_y,
op_pixels_func *pix_op,
int motion_x, int motion_y)
{
int dxy = 0;
int emu = 0;
src_x += motion_x >> 1;
src_y += motion_y >> 1;
/* WARNING: do no forget half pels */
src_x = av_clip(src_x, -16, s->width); // FIXME unneeded for emu?
if (src_x != s->width)
dxy |= motion_x & 1;
src_y = av_clip(src_y, -16, s->height);
if (src_y != s->height)
dxy |= (motion_y & 1) << 1;
src += src_y * s->linesize + src_x;
if ((unsigned)src_x > FFMAX(s->h_edge_pos - (motion_x & 1) - 8, 0) ||
(unsigned)src_y > FFMAX(s->v_edge_pos - (motion_y & 1) - 8, 0)) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, src,
s->linesize, s->linesize,
9, 9, src_x, src_y,
s->h_edge_pos, s->v_edge_pos);
src = s->sc.edge_emu_buffer;
emu = 1;
}
pix_op[dxy](dest, src, s->linesize, 8);
return emu;
}
static av_always_inline
void emulated_edge_mc(MpegEncContext *s,
int src_x, int src_y,
int uvsrc_x, int uvsrc_y,
int field_based,
uint8_t **ptr_y,
uint8_t **ptr_cb,
uint8_t **ptr_cr)
{
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, *ptr_y,
s->linesize, s->linesize,
17, 17 + field_based,
src_x, src_y * (1 << field_based),
s->h_edge_pos, s->v_edge_pos);
*ptr_y = s->sc.edge_emu_buffer;
if (!CONFIG_GRAY || !(s->avctx->flags & AV_CODEC_FLAG_GRAY)) {
uint8_t *uvbuf = s->sc.edge_emu_buffer + 18 * s->linesize;
s->vdsp.emulated_edge_mc(uvbuf, *ptr_cb,
s->uvlinesize, s->uvlinesize,
9, 9 + field_based,
uvsrc_x, uvsrc_y * (1 << field_based),
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
s->vdsp.emulated_edge_mc(uvbuf + 16, *ptr_cr,
s->uvlinesize, s->uvlinesize,
9, 9 + field_based,
uvsrc_x, uvsrc_y * (1 << field_based),
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
*ptr_cb = uvbuf;
*ptr_cr = uvbuf + 16;
}
}
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;
ptrdiff_t uvlinesize, linesize;
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;
}
// Even chroma mv's are full pel in H261
} else if (!is_mpeg12 && s->out_format == FMT_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;
}
emulated_edge_mc(s, src_x, src_y, uvsrc_x, uvsrc_y, field_based,
&ptr_y, &ptr_cb, &ptr_cr);
}
/* FIXME use this for field pix too instead of the obnoxious hack which
* changes picture.data */
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;
}
pix_op[0][dxy](dest_y, ptr_y, linesize, h);
if (!CONFIG_GRAY || !(s->avctx->flags & AV_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 void mpeg_motion(MpegEncContext *s,
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr,
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, 0, 0,
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, 0, 0,
field_select, ref_picture, pix_op,
motion_x, motion_y, h, 0, mb_y);
}
static void mpeg_motion_field(MpegEncContext *s, uint8_t *dest_y,
uint8_t *dest_cb, uint8_t *dest_cr,
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, 1,
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, 1,
bottom_field, field_select, ref_picture, pix_op,
motion_x, motion_y, h, 0, mb_y);
}
// FIXME: SIMDify, 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->sc.obmc_scratchpad + 8 * (i & 1) +
s->linesize * 8 * (i >> 1);
hpel_motion(s, ptr[i], src, src_x, src_y, 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;
ptrdiff_t 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)) {
emulated_edge_mc(s, src_x, src_y, uvsrc_x, uvsrc_y, field_based,
&ptr_y, &ptr_cb, &ptr_cr);
}
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->avctx->flags & AV_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);
}
}
/**
* H.263 chroma 4mv motion compensation.
*/
static 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)
{
uint8_t *ptr;
int src_x, src_y, dxy, emu = 0;
ptrdiff_t offset;
/* 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 ((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->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
s->uvlinesize, s->uvlinesize,
9, 9, src_x, src_y,
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
ptr = s->sc.edge_emu_buffer;
emu = 1;
}
pix_op[dxy](dest_cb, ptr, s->uvlinesize, 8);
ptr = ref_picture[2] + offset;
if (emu) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
s->uvlinesize, s->uvlinesize,
9, 9, src_x, src_y,
s->h_edge_pos >> 1, s->v_edge_pos >> 1);
ptr = s->sc.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->vdsp.prefetch(pix[0] + off, s->linesize, 4);
off = (mx >> 1) + ((my >> 1) + (s->mb_x & 7)) * s->uvlinesize + 64;
s->vdsp.prefetch(pix[1] + off, pix[2] - pix[1], 2);
}
static inline void apply_obmc(MpegEncContext *s,
uint8_t *dest_y,
uint8_t *dest_cb,
uint8_t *dest_cr,
uint8_t **ref_picture,
op_pixels_func (*pix_op)[4])
{
LOCAL_ALIGNED_8(int16_t, mv_cache, [4], [4][2]);
Picture *cur_frame = &s->current_picture;
int mb_x = s->mb_x;
int mb_y = s->mb_y;
const int xy = mb_x + mb_y * s->mb_stride;
const int mot_stride = s->b8_stride;
const int mot_xy = mb_x * 2 + mb_y * 2 * mot_stride;
int mx, my, i;
assert(!s->mb_skipped);
AV_COPY32(mv_cache[1][1], cur_frame->motion_val[0][mot_xy]);
AV_COPY32(mv_cache[1][2], cur_frame->motion_val[0][mot_xy + 1]);
AV_COPY32(mv_cache[2][1],
cur_frame->motion_val[0][mot_xy + mot_stride]);
AV_COPY32(mv_cache[2][2],
cur_frame->motion_val[0][mot_xy + mot_stride + 1]);
AV_COPY32(mv_cache[3][1],
cur_frame->motion_val[0][mot_xy + mot_stride]);
AV_COPY32(mv_cache[3][2],
cur_frame->motion_val[0][mot_xy + mot_stride + 1]);
if (mb_y == 0 || IS_INTRA(cur_frame->mb_type[xy - s->mb_stride])) {
AV_COPY32(mv_cache[0][1], mv_cache[1][1]);
AV_COPY32(mv_cache[0][2], mv_cache[1][2]);
} else {
AV_COPY32(mv_cache[0][1],
cur_frame->motion_val[0][mot_xy - mot_stride]);
AV_COPY32(mv_cache[0][2],
cur_frame->motion_val[0][mot_xy - mot_stride + 1]);
}
if (mb_x == 0 || IS_INTRA(cur_frame->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], cur_frame->motion_val[0][mot_xy - 1]);
AV_COPY32(mv_cache[2][0],
cur_frame->motion_val[0][mot_xy - 1 + mot_stride]);
}
if (mb_x + 1 >= s->mb_width || IS_INTRA(cur_frame->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], cur_frame->motion_val[0][mot_xy + 2]);
AV_COPY32(mv_cache[2][3],
cur_frame->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->avctx->flags & AV_CODEC_FLAG_GRAY))
chroma_4mv_motion(s, dest_cb, dest_cr,
ref_picture, pix_op[1],
mx, my);
}
static inline void apply_8x8(MpegEncContext *s,
uint8_t *dest_y,
uint8_t *dest_cb,
uint8_t *dest_cr,
int dir,
uint8_t **ref_picture,
qpel_mc_func (*qpix_op)[16],
op_pixels_func (*pix_op)[4])
{
int dxy, mx, my, src_x, src_y;
int i;
int mb_x = s->mb_x;
int mb_y = s->mb_y;
uint8_t *ptr, *dest;
mx = 0;
my = 0;
if (s->quarter_sample) {
for (i = 0; i < 4; i++) {
int motion_x = s->mv[dir][i][0];
int 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 ((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->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
s->linesize, s->linesize,
9, 9,
src_x, src_y,
s->h_edge_pos,
s->v_edge_pos);
ptr = s->sc.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],
mb_x * 16 + (i & 1) * 8,
mb_y * 16 + (i >> 1) * 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->avctx->flags & AV_CODEC_FLAG_GRAY))
chroma_4mv_motion(s, dest_cb, dest_cr,
ref_picture, pix_op[1], mx, my);
}
/**
* 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 i;
int mb_y = s->mb_y;
prefetch_motion(s, ref_picture, dir);
if (!is_mpeg12 && s->obmc && s->pict_type != AV_PICTURE_TYPE_B) {
apply_obmc(s, dest_y, dest_cb, dest_cr, ref_picture, pix_op);
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,
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)
apply_8x8(s, dest_y, dest_cb, dest_cr,
dir, ref_picture, qpix_op, pix_op);
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_field(s, dest_y, dest_cb, dest_cr,
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_field(s, dest_y, dest_cb, dest_cr,
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,
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,
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_field(s, dest_y, dest_cb, dest_cr,
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->hdsp.avg_pixels_tab;
}
} else {
for (i = 0; i < 2; i++) {
mpeg_motion(s, dest_y, dest_cb, dest_cr,
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->hdsp.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);
}
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