mirror of
https://github.com/FFmpeg/FFmpeg.git
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137 lines
5.0 KiB
C
137 lines
5.0 KiB
C
/*
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* Copyright (c) 2002 The FFmpeg Project
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "idctdsp.h"
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#include "mpegvideo.h"
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#include "msmpeg4data.h"
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#include "wmv2.h"
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av_cold void ff_wmv2_common_init(MpegEncContext *s)
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{
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WMV2Context *const w = s->private_ctx;
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ff_blockdsp_init(&s->bdsp, s->avctx);
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ff_wmv2dsp_init(&w->wdsp);
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s->idsp.perm_type = w->wdsp.idct_perm;
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ff_init_scantable_permutation(s->idsp.idct_permutation,
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w->wdsp.idct_perm);
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ff_init_scantable(s->idsp.idct_permutation, &s->intra_scantable,
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ff_wmv1_scantable[1]);
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ff_init_scantable(s->idsp.idct_permutation, &s->intra_h_scantable,
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ff_wmv1_scantable[2]);
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ff_init_scantable(s->idsp.idct_permutation, &s->intra_v_scantable,
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ff_wmv1_scantable[3]);
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ff_init_scantable(s->idsp.idct_permutation, &s->inter_scantable,
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ff_wmv1_scantable[0]);
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s->idsp.idct_put = w->wdsp.idct_put;
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s->idsp.idct_add = w->wdsp.idct_add;
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s->idsp.idct = NULL;
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}
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void ff_mspel_motion(MpegEncContext *s, uint8_t *dest_y,
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uint8_t *dest_cb, uint8_t *dest_cr,
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uint8_t **ref_picture, op_pixels_func (*pix_op)[4],
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int motion_x, int motion_y, int h)
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{
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WMV2Context *const w = s->private_ctx;
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uint8_t *ptr;
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int dxy, mx, my, src_x, src_y, v_edge_pos;
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ptrdiff_t offset, linesize, uvlinesize;
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int emu = 0;
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dxy = ((motion_y & 1) << 1) | (motion_x & 1);
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dxy = 2 * dxy + w->hshift;
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src_x = s->mb_x * 16 + (motion_x >> 1);
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src_y = s->mb_y * 16 + (motion_y >> 1);
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/* WARNING: do no forget half pels */
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v_edge_pos = s->v_edge_pos;
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src_x = av_clip(src_x, -16, s->width);
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src_y = av_clip(src_y, -16, s->height);
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if (src_x <= -16 || src_x >= s->width)
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dxy &= ~3;
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if (src_y <= -16 || src_y >= s->height)
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dxy &= ~4;
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linesize = s->linesize;
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uvlinesize = s->uvlinesize;
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ptr = ref_picture[0] + (src_y * linesize) + src_x;
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if (src_x < 1 || src_y < 1 || src_x + 17 >= s->h_edge_pos ||
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src_y + h + 1 >= v_edge_pos) {
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s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr - 1 - s->linesize,
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s->linesize, s->linesize, 19, 19,
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src_x - 1, src_y - 1,
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s->h_edge_pos, s->v_edge_pos);
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ptr = s->sc.edge_emu_buffer + 1 + s->linesize;
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emu = 1;
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}
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w->wdsp.put_mspel_pixels_tab[dxy](dest_y, ptr, linesize);
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w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8, ptr + 8, linesize);
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w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 * linesize, ptr + 8 * linesize, linesize);
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w->wdsp.put_mspel_pixels_tab[dxy](dest_y + 8 + 8 * linesize, ptr + 8 + 8 * linesize, linesize);
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if (s->avctx->flags & AV_CODEC_FLAG_GRAY)
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return;
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dxy = 0;
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if ((motion_x & 3) != 0)
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dxy |= 1;
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if ((motion_y & 3) != 0)
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dxy |= 2;
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mx = motion_x >> 2;
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my = motion_y >> 2;
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src_x = s->mb_x * 8 + mx;
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src_y = s->mb_y * 8 + my;
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src_x = av_clip(src_x, -8, s->width >> 1);
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if (src_x == (s->width >> 1))
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dxy &= ~1;
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src_y = av_clip(src_y, -8, s->height >> 1);
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if (src_y == (s->height >> 1))
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dxy &= ~2;
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offset = (src_y * uvlinesize) + src_x;
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ptr = ref_picture[1] + offset;
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if (emu) {
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s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
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s->uvlinesize, s->uvlinesize,
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9, 9,
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src_x, src_y,
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s->h_edge_pos >> 1, s->v_edge_pos >> 1);
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ptr = s->sc.edge_emu_buffer;
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}
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pix_op[1][dxy](dest_cb, ptr, uvlinesize, h >> 1);
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ptr = ref_picture[2] + offset;
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if (emu) {
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s->vdsp.emulated_edge_mc(s->sc.edge_emu_buffer, ptr,
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s->uvlinesize, s->uvlinesize,
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9, 9,
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src_x, src_y,
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s->h_edge_pos >> 1, s->v_edge_pos >> 1);
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ptr = s->sc.edge_emu_buffer;
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}
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pix_op[1][dxy](dest_cr, ptr, uvlinesize, h >> 1);
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}
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