diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/wmv2.c')
| -rw-r--r-- | contrib/ffmpeg/libavcodec/wmv2.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/contrib/ffmpeg/libavcodec/wmv2.c b/contrib/ffmpeg/libavcodec/wmv2.c new file mode 100644 index 000000000..39efea29c --- /dev/null +++ b/contrib/ffmpeg/libavcodec/wmv2.c @@ -0,0 +1,159 @@ +/* + * Copyright (c) 2002 The FFmpeg Project. + * + * 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 + */ + +#include "avcodec.h" +#include "mpegvideo.h" +#include "msmpeg4data.h" +#include "simple_idct.h" +#include "wmv2.h" + + +void ff_wmv2_common_init(Wmv2Context * w){ + MpegEncContext * const s= &w->s; + + ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[0], wmv2_scantableA); + ff_init_scantable(s->dsp.idct_permutation, &w->abt_scantable[1], wmv2_scantableB); +} + +static void wmv2_add_block(Wmv2Context *w, DCTELEM *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: + s->dsp.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]); + memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM)); + break; + case 2: + ff_simple_idct48_add(dst , stride, block1); + ff_simple_idct48_add(dst + 4 , stride, w->abt_block2[n]); + memset(w->abt_block2[n], 0, 64*sizeof(DCTELEM)); + break; + default: + av_log(s->avctx, AV_LOG_ERROR, "internal error in WMV2 abt\n"); + } + } +} + +void ff_wmv2_add_mb(MpegEncContext *s, DCTELEM 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->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, 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(s->flags&CODEC_FLAG_EMU_EDGE){ + if(src_x<1 || src_y<1 || src_x + 17 >= s->h_edge_pos + || src_y + h+1 >= v_edge_pos){ + ff_emulated_edge_mc(s->edge_emu_buffer, ptr - 1 - s->linesize, s->linesize, 19, 19, + src_x-1, src_y-1, s->h_edge_pos, s->v_edge_pos); + ptr= s->edge_emu_buffer + 1 + s->linesize; + emu=1; + } + } + + s->dsp.put_mspel_pixels_tab[dxy](dest_y , ptr , linesize); + s->dsp.put_mspel_pixels_tab[dxy](dest_y+8 , ptr+8 , linesize); + s->dsp.put_mspel_pixels_tab[dxy](dest_y +8*linesize, ptr +8*linesize, linesize); + s->dsp.put_mspel_pixels_tab[dxy](dest_y+8+8*linesize, ptr+8+8*linesize, linesize); + + if(s->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){ + ff_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[1][dxy](dest_cb, ptr, uvlinesize, h >> 1); + + ptr = ref_picture[2] + offset; + if(emu){ + ff_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[1][dxy](dest_cr, ptr, uvlinesize, h >> 1); +} |