diff options
Diffstat (limited to 'media/libstagefright/codecs/m4v_h263/dec/src/deringing_luma.cpp')
| -rw-r--r-- | media/libstagefright/codecs/m4v_h263/dec/src/deringing_luma.cpp | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/media/libstagefright/codecs/m4v_h263/dec/src/deringing_luma.cpp b/media/libstagefright/codecs/m4v_h263/dec/src/deringing_luma.cpp new file mode 100644 index 0000000..b5574b4 --- /dev/null +++ b/media/libstagefright/codecs/m4v_h263/dec/src/deringing_luma.cpp @@ -0,0 +1,231 @@ +/* ------------------------------------------------------------------ + * Copyright (C) 1998-2009 PacketVideo + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either + * express or implied. + * See the License for the specific language governing permissions + * and limitations under the License. + * ------------------------------------------------------------------- + */ +#include "mp4dec_lib.h" +#include "post_proc.h" + +#ifdef PV_POSTPROC_ON + +void Deringing_Luma( + uint8 *Rec_Y, + int width, + int height, + int16 *QP_store, + int, + uint8 *pp_mod) +{ + /*---------------------------------------------------------------------------- + ; Define all local variables + ----------------------------------------------------------------------------*/ + int thres[4], range[4], max_range_blk, max_thres_blk; + int MB_V, MB_H, BLK_V, BLK_H; + int v_blk, h_blk; + int max_diff; + int max_blk, min_blk; + int v0, h0; + uint8 *ptr; + int thr, blks, incr; + int mb_indx, blk_indx; + + /*---------------------------------------------------------------------------- + ; Function body here + ----------------------------------------------------------------------------*/ + incr = width - BLKSIZE; + + /* Dering the first line of macro blocks */ + for (MB_H = 0; MB_H < width; MB_H += MBSIZE) + { + max_diff = (QP_store[(MB_H)>>4] >> 2) + 4; + + /* threshold determination */ + max_range_blk = max_thres_blk = 0; + blks = 0; + + for (BLK_V = 0; BLK_V < MBSIZE; BLK_V += BLKSIZE) + { + for (BLK_H = 0; BLK_H < MBSIZE; BLK_H += BLKSIZE) + { + ptr = &Rec_Y[(int32)(BLK_V) * width + MB_H + BLK_H]; + FindMaxMin(ptr, &min_blk, &max_blk, incr); + + thres[blks] = (max_blk + min_blk + 1) >> 1; + range[blks] = max_blk - min_blk; + + if (range[blks] >= max_range_blk) + { + max_range_blk = range[blks]; + max_thres_blk = thres[blks]; + } + blks++; + } + } + + blks = 0; + for (v_blk = 0; v_blk < MBSIZE; v_blk += BLKSIZE) + { + v0 = ((v_blk - 1) >= 1) ? (v_blk - 1) : 1; + for (h_blk = MB_H; h_blk < MB_H + MBSIZE; h_blk += BLKSIZE) + { + h0 = ((h_blk - 1) >= 1) ? (h_blk - 1) : 1; + + /* threshold rearrangement for flat region adjacent to non-flat region */ + if (range[blks]<32 && max_range_blk >= 64) + thres[blks] = max_thres_blk; + + /* threshold rearrangement for deblocking + (blockiness annoying at DC dominant region) */ + if (max_range_blk >= 16) + { + /* adaptive smoothing */ + thr = thres[blks]; + + AdaptiveSmooth_NoMMX(Rec_Y, v0, h0, v_blk, h_blk, + thr, width, max_diff); + } + blks++; + } /* block level (Luminance) */ + } + } /* macroblock level */ + + + /* Do the rest of the macro-block-lines */ + for (MB_V = MBSIZE; MB_V < height; MB_V += MBSIZE) + { + /* First macro-block */ + max_diff = (QP_store[((((int32)MB_V*width)>>4))>>4] >> 2) + 4; + /* threshold determination */ + max_range_blk = max_thres_blk = 0; + blks = 0; + for (BLK_V = 0; BLK_V < MBSIZE; BLK_V += BLKSIZE) + { + for (BLK_H = 0; BLK_H < MBSIZE; BLK_H += BLKSIZE) + { + ptr = &Rec_Y[(int32)(MB_V + BLK_V) * width + BLK_H]; + FindMaxMin(ptr, &min_blk, &max_blk, incr); + thres[blks] = (max_blk + min_blk + 1) >> 1; + range[blks] = max_blk - min_blk; + + if (range[blks] >= max_range_blk) + { + max_range_blk = range[blks]; + max_thres_blk = thres[blks]; + } + blks++; + } + } + + blks = 0; + for (v_blk = MB_V; v_blk < MB_V + MBSIZE; v_blk += BLKSIZE) + { + v0 = v_blk - 1; + for (h_blk = 0; h_blk < MBSIZE; h_blk += BLKSIZE) + { + h0 = ((h_blk - 1) >= 1) ? (h_blk - 1) : 1; + + /* threshold rearrangement for flat region adjacent to non-flat region */ + if (range[blks]<32 && max_range_blk >= 64) + thres[blks] = max_thres_blk; + + /* threshold rearrangement for deblocking + (blockiness annoying at DC dominant region) */ + if (max_range_blk >= 16) + { + /* adaptive smoothing */ + thr = thres[blks]; + + AdaptiveSmooth_NoMMX(Rec_Y, v0, h0, v_blk, h_blk, + thr, width, max_diff); + } + blks++; + } + } /* block level (Luminance) */ + + /* Rest of the macro-blocks */ + for (MB_H = MBSIZE; MB_H < width; MB_H += MBSIZE) + { + max_diff = (QP_store[((((int32)MB_V*width)>>4)+MB_H)>>4] >> 2) + 4; + + /* threshold determination */ + max_range_blk = max_thres_blk = 0; + blks = 0; + + mb_indx = (MB_V / 8) * (width / 8) + MB_H / 8; + for (BLK_V = 0; BLK_V < MBSIZE; BLK_V += BLKSIZE) + { + for (BLK_H = 0; BLK_H < MBSIZE; BLK_H += BLKSIZE) + { + blk_indx = mb_indx + (BLK_V / 8) * width / 8 + BLK_H / 8; + /* Update based on pp_mod only */ + if ((pp_mod[blk_indx]&0x4) != 0) + { + ptr = &Rec_Y[(int32)(MB_V + BLK_V) * width + MB_H + BLK_H]; + FindMaxMin(ptr, &min_blk, &max_blk, incr); + thres[blks] = (max_blk + min_blk + 1) >> 1; + range[blks] = max_blk - min_blk; + + if (range[blks] >= max_range_blk) + { + max_range_blk = range[blks]; + max_thres_blk = thres[blks]; + } + } + blks++; + } + } + + blks = 0; + for (v_blk = MB_V; v_blk < MB_V + MBSIZE; v_blk += BLKSIZE) + { + v0 = v_blk - 1; + mb_indx = (v_blk / 8) * (width / 8); + for (h_blk = MB_H; h_blk < MB_H + MBSIZE; h_blk += BLKSIZE) + { + h0 = h_blk - 1; + blk_indx = mb_indx + h_blk / 8; + if ((pp_mod[blk_indx]&0x4) != 0) + { + /* threshold rearrangement for flat region adjacent to non-flat region */ + if (range[blks]<32 && max_range_blk >= 64) + thres[blks] = max_thres_blk; + + /* threshold rearrangement for deblocking + (blockiness annoying at DC dominant region) */ + if (max_range_blk >= 16) + { + /* adaptive smoothing */ + thr = thres[blks]; +#ifdef NoMMX + AdaptiveSmooth_NoMMX(Rec_Y, v0, h0, v_blk, h_blk, + thr, width, max_diff); +#else + DeringAdaptiveSmoothMMX(&Rec_Y[v0*width+h0], + width, thr, max_diff); +#endif + } + } + blks++; + } + } /* block level (Luminance) */ + } /* macroblock level */ + } /* macroblock level */ + + /*---------------------------------------------------------------------------- + ; Return nothing or data or data pointer + ----------------------------------------------------------------------------*/ + return; +} +#endif |