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ffmpeg/libavcodec/wmv2.c

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/*
* Copyright (c) 2002 The Libav Project
*
* 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 "avcodec.h"
#include "idctdsp.h"
#include "mpegvideo.h"
#include "msmpeg4data.h"
#include "simple_idct.h"
#include "wmv2.h"
av_cold void ff_wmv2_common_init(Wmv2Context *w)
{
MpegEncContext *const s = &w->s;
ff_blockdsp_init(&s->bdsp, s->avctx);
ff_wmv2dsp_init(&w->wdsp);
s->idsp.perm_type = w->wdsp.idct_perm;
ff_init_scantable_permutation(s->idsp.idct_permutation,
w->wdsp.idct_perm);
ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[0],
ff_wmv2_scantableA);
ff_init_scantable(s->idsp.idct_permutation, &w->abt_scantable[1],
ff_wmv2_scantableB);
ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable,
ff_wmv1_scantable[1]);
ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable,
ff_wmv1_scantable[2]);
ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable,
ff_wmv1_scantable[3]);
ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable,
ff_wmv1_scantable[0]);
s->idsp.idct_put = w->wdsp.idct_put;
s->idsp.idct_add = w->wdsp.idct_add;
s->idsp.idct = NULL;
}
static void wmv2_add_block(Wmv2Context *w, int16_t *block1,
uint8_t *dst, int stride, int n)
{
MpegEncContext *const s = &w->s;
if (s->block_last_index[n] >= 0) {
switch (w->abt_type_table[n]) {
case 0:
w->wdsp.idct_add(dst, stride, block1);
break;
case 1:
ff_simple_idct84_add(dst, stride, block1);
ff_simple_idct84_add(dst + 4 * stride, stride, w->abt_block2[n]);
s->bdsp.clear_block(w->abt_block2[n]);
break;
case 2:
ff_simple_idct48_add(dst, stride, block1);
ff_simple_idct48_add(dst + 4, stride, w->abt_block2[n]);
s->bdsp.clear_block(w->abt_block2[n]);
break;
default:
av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n");
}
}
}
void ff_wmv2_add_mb(MpegEncContext *s, int16_t block1[6][64],
uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr)
{
Wmv2Context *const w = (Wmv2Context *) s;
wmv2_add_block(w, block1[0], dest_y, s->linesize, 0);
wmv2_add_block(w, block1[1], dest_y + 8, s->linesize, 1);
wmv2_add_block(w, block1[2], dest_y + 8 * s->linesize, s->linesize, 2);
wmv2_add_block(w, block1[3], dest_y + 8 + 8 * s->linesize, s->linesize, 3);
if (s->avctx->flags & CODEC_FLAG_GRAY)
return;
wmv2_add_block(w, block1[4], dest_cb, s->uvlinesize, 4);
wmv2_add_block(w, block1[5], dest_cr, s->uvlinesize, 5);
}
void ff_mspel_motion(MpegEncContext *s, uint8_t *dest_y,
uint8_t *dest_cb, uint8_t *dest_cr,
uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
int motion_x, int motion_y, int h)
{
Wmv2Context *const w = (Wmv2Context *) s;
uint8_t *ptr;
int dxy, offset, mx, my, src_x, src_y, v_edge_pos;
ptrdiff_t linesize, uvlinesize;
int emu = 0;
dxy = ((motion_y & 1) << 1) | (motion_x & 1);
dxy = 2 * dxy + w->hshift;
src_x = s->mb_x * 16 + (motion_x >> 1);
src_y = s->mb_y * 16 + (motion_y >> 1);
/* WARNING: do no forget half pels */
v_edge_pos = s->v_edge_pos;
src_x = av_clip(src_x, -16, s->width);
src_y = av_clip(src_y, -16, s->height);
if (src_x <= -16 || src_x >= s->width)
dxy &= ~3;
if (src_y <= -16 || src_y >= s->height)
dxy &= ~4;
linesize = s->linesize;
uvlinesize = s->uvlinesize;
ptr = ref_picture[0] + (src_y * linesize) + src_x;
if (src_x < 1 || src_y < 1 || src_x + 17 >= s->h_edge_pos ||
src_y + h + 1 >= v_edge_pos) {
s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr - 1 - s->linesize,
s->linesize, s->linesize, 19, 19,
src_x - 1, src_y - 1,
s->h_edge_pos, s->v_edge_pos);
ptr = s->sc.edge_emu_buffer + 1 + s->linesize;
emu = 1;
}
w->wdsp.put_mspel_pixels_tab[dxy](dest_y, ptr, linesize);
w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8, ptr + 8, linesize);
w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 * linesize, ptr + 8 * linesize, linesize);
w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 + 8 * linesize, ptr + 8 + 8 * linesize, linesize);
if (s->avctx->flags & CODEC_FLAG_GRAY)
return;
if (s->out_format == FMT_H263) {
dxy = 0;
if ((motion_x & 3) != 0)
dxy |= 1;
if ((motion_y & 3) != 0)
dxy |= 2;
mx = motion_x >> 2;
my = motion_y >> 2;
} else {
mx = motion_x / 2;
my = motion_y / 2;
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 * uvlinesize) + src_x;
ptr = ref_picture[1] + 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[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
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[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
}
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