MPlayer 源代码1

/* * VC-1 and WMV3 decoder * Copyright (c) 2011 Mashiat Sarker Shakkhar * Copyright (c) 2006-2007 Konstantin Shishkov * Partly based on vc9.c (c) 2005 Anonymous, Alex Beregszaszi, Michael Niedermayer * * 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 */ /** * @file * VC-1 and WMV3 decoder */ #include "internal.h" #include "dsputil.h" #include "avcodec.h" #include "mpegvideo.h" #include "h263.h" #include "vc1.h" #include "vc1data.h" #include "vc1acdata.h" #include "msmpeg4data.h" #include "unary.h" #include "mathops.h" #include "vdpau_internal.h" #include "libavutil/avassert.h" #undef NDEBUG #include <assert.h> #define MB_INTRA_VLC_BITS 9 #define DC_VLC_BITS 9 // offset tables for interlaced picture MVDATA decoding static const int offset_table1[9] = { 0, 1, 2, 4, 8, 16, 32, 64, 128 }; static const int offset_table2[9] = { 0, 1, 3, 7, 15, 31, 63, 127, 255 }; /***********************************************************************/ /** * @name VC-1 Bitplane decoding * @see 8.7, p56 * @{ */ /** * Imode types * @{ */ enum Imode { IMODE_RAW, IMODE_NORM2, IMODE_DIFF2, IMODE_NORM6, IMODE_DIFF6, IMODE_ROWSKIP, IMODE_COLSKIP }; /** @} */ //imode defines /** @} */ //Bitplane group static void vc1_put_signed_blocks_clamped(VC1Context *v) { MpegEncContext *s = &v->s; int topleft_mb_pos, top_mb_pos; int stride_y, fieldtx = 0; int v_dist; /* The put pixels loop is always one MB row behind the decoding loop, * because we can only put pixels when overlap filtering is done, and * for filtering of the bottom edge of a MB, we need the next MB row * present as well. * Within the row, the put pixels loop is also one MB col behind the * decoding loop. The reason for this is again, because for filtering * of the right MB edge, we need the next MB present. */ if (!s->first_slice_line) { if (s->mb_x) { topleft_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x - 1; if (v->fcm == ILACE_FRAME) fieldtx = v->fieldtx_plane[topleft_mb_pos]; stride_y = s->linesize << fieldtx; v_dist = (16 - fieldtx) >> (fieldtx == 0); s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][0], s->dest[0] - 16 * s->linesize - 16, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][1], s->dest[0] - 16 * s->linesize - 8, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][2], s->dest[0] - v_dist * s->linesize - 16, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][3], s->dest[0] - v_dist * s->linesize - 8, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][4], s->dest[1] - 8 * s->uvlinesize - 8, s->uvlinesize); s->dsp.put_signed_pixels_clamped(v->block[v->topleft_blk_idx][5], s->dest[2] - 8 * s->uvlinesize - 8, s->uvlinesize); } if (s->mb_x == s->mb_width - 1) { top_mb_pos = (s->mb_y - 1) * s->mb_stride + s->mb_x; if (v->fcm == ILACE_FRAME) fieldtx = v->fieldtx_plane[top_mb_pos]; stride_y = s->linesize << fieldtx; v_dist = fieldtx ? 15 : 8; s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][0], s->dest[0] - 16 * s->linesize, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][1], s->dest[0] - 16 * s->linesize + 8, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][2], s->dest[0] - v_dist * s->linesize, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][3], s->dest[0] - v_dist * s->linesize + 8, stride_y); s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][4], s->dest[1] - 8 * s->uvlinesize, s->uvlinesize); s->dsp.put_signed_pixels_clamped(v->block[v->top_blk_idx][5], s->dest[2] - 8 * s->uvlinesize, s->uvlinesize); } } #define inc_blk_idx(idx) do { \ idx++; \ if (idx >= v->n_allocated_blks) \ idx = 0; \ } while (0) inc_blk_idx(v->topleft_blk_idx); inc_blk_idx(v->top_blk_idx); inc_blk_idx(v->left_blk_idx); inc_blk_idx(v->cur_blk_idx); } static void vc1_loop_filter_iblk(VC1Context *v, int pq) { MpegEncContext *s = &v->s; int j; if (!s->first_slice_line) { v->vc1dsp.vc1_v_loop_filter16(s->dest[0], s->linesize, pq); if (s->mb_x) v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize, s->linesize, pq); v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 16 * s->linesize + 8, s->linesize, pq); for (j = 0; j < 2; j++) { v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1], s->uvlinesize, pq); if (s->mb_x) v->vc1dsp.vc1_h_loop_filter8(s->dest[j + 1] - 8 * s->uvlinesize, s->uvlinesize, pq); } } v->vc1dsp.vc1_v_loop_filter16(s->dest[0] + 8 * s->linesize, s->linesize, pq); if (s->mb_y == s->end_mb_y - 1) { if (s->mb_x) { v->vc1dsp.vc1_h_loop_filter16(s->dest[0], s->linesize, pq); v->vc1dsp.vc1_h_loop_filter8(s->dest[1], s->uvlinesize, pq); v->vc1dsp.vc1_h_loop_filter8(s->dest[2], s->uvlinesize, pq); } v->vc1dsp.vc1_h_loop_filter16(s->dest[0] + 8, s->linesize, pq); } } static void vc1_loop_filter_iblk_delayed(VC1Context *v, int pq) { MpegEncContext *s = &v->s; int j; /* The loopfilter runs 1 row and 1 column behind the overlap filter, which * means it runs two rows/cols behind the decoding loop. */ if (!s->first_slice_line) { if (s->mb_x) { if (s->mb_y >= s->start_mb_y + 2) { v->vc1dsp.vc1_v_loop_filter16(s->dest[0] - 16 * s->linesize - 16, s->linesize, pq); if (s->mb_x >= 2) v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 16, s->linesize, pq); v->vc1dsp.vc1_h_loop_filter16(s->dest[0] - 32 * s->linesize - 8, s->linesize, pq); for (j = 0; j < 2; j++) { v->vc1dsp.vc1_v_loop_filter8(s->dest[j + 1]