diff options
Diffstat (limited to 'ffmpeg1/libavcodec/mss34dsp.c')
| -rw-r--r-- | ffmpeg1/libavcodec/mss34dsp.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/ffmpeg1/libavcodec/mss34dsp.c b/ffmpeg1/libavcodec/mss34dsp.c deleted file mode 100644 index e4d4299..0000000 --- a/ffmpeg1/libavcodec/mss34dsp.c +++ /dev/null @@ -1,114 +0,0 @@ -/* - * Common stuff for some Microsoft Screen codecs - * Copyright (C) 2012 Konstantin Shishkov - * - * 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 <stdint.h> -#include "libavutil/common.h" -#include "mss34dsp.h" - -static const uint8_t luma_quant[64] = { - 16, 11, 10, 16, 24, 40, 51, 61, - 12, 12, 14, 19, 26, 58, 60, 55, - 14, 13, 16, 24, 40, 57, 69, 56, - 14, 17, 22, 29, 51, 87, 80, 62, - 18, 22, 37, 56, 68, 109, 103, 77, - 24, 35, 55, 64, 81, 104, 113, 92, - 49, 64, 78, 87, 103, 121, 120, 101, - 72, 92, 95, 98, 112, 100, 103, 99 -}; - -static const uint8_t chroma_quant[64] = { - 17, 18, 24, 47, 99, 99, 99, 99, - 18, 21, 26, 66, 99, 99, 99, 99, - 24, 26, 56, 99, 99, 99, 99, 99, - 47, 66, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99, - 99, 99, 99, 99, 99, 99, 99, 99 -}; - -void ff_mss34_gen_quant_mat(uint16_t *qmat, int quality, int luma) -{ - int i; - const uint8_t *qsrc = luma ? luma_quant : chroma_quant; - - if (quality >= 50) { - int scale = 200 - 2 * quality; - - for (i = 0; i < 64; i++) - qmat[i] = (qsrc[i] * scale + 50) / 100; - } else { - for (i = 0; i < 64; i++) - qmat[i] = (5000 * qsrc[i] / quality + 50) / 100; - } -} - -#define DCT_TEMPLATE(blk, step, SOP, shift) \ - const int t0 = -39409 * blk[7 * step] - 58980 * blk[1 * step]; \ - const int t1 = 39410 * blk[1 * step] - 58980 * blk[7 * step]; \ - const int t2 = -33410 * blk[5 * step] - 167963 * blk[3 * step]; \ - const int t3 = 33410 * blk[3 * step] - 167963 * blk[5 * step]; \ - const int t4 = blk[3 * step] + blk[7 * step]; \ - const int t5 = blk[1 * step] + blk[5 * step]; \ - const int t6 = 77062 * t4 + 51491 * t5; \ - const int t7 = 77062 * t5 - 51491 * t4; \ - const int t8 = 35470 * blk[2 * step] - 85623 * blk[6 * step]; \ - const int t9 = 35470 * blk[6 * step] + 85623 * blk[2 * step]; \ - const int tA = SOP(blk[0 * step] - blk[4 * step]); \ - const int tB = SOP(blk[0 * step] + blk[4 * step]); \ - \ - blk[0 * step] = ( t1 + t6 + t9 + tB) >> shift; \ - blk[1 * step] = ( t3 + t7 + t8 + tA) >> shift; \ - blk[2 * step] = ( t2 + t6 - t8 + tA) >> shift; \ - blk[3 * step] = ( t0 + t7 - t9 + tB) >> shift; \ - blk[4 * step] = (-(t0 + t7) - t9 + tB) >> shift; \ - blk[5 * step] = (-(t2 + t6) - t8 + tA) >> shift; \ - blk[6 * step] = (-(t3 + t7) + t8 + tA) >> shift; \ - blk[7 * step] = (-(t1 + t6) + t9 + tB) >> shift; \ - -#define SOP_ROW(a) ((a) << 16) + 0x2000 -#define SOP_COL(a) ((a + 32) << 16) - -void ff_mss34_dct_put(uint8_t *dst, int stride, int *block) -{ - int i, j; - int *ptr; - - ptr = block; - for (i = 0; i < 8; i++) { - DCT_TEMPLATE(ptr, 1, SOP_ROW, 13); - ptr += 8; - } - - ptr = block; - for (i = 0; i < 8; i++) { - DCT_TEMPLATE(ptr, 8, SOP_COL, 22); - ptr++; - } - - ptr = block; - for (j = 0; j < 8; j++) { - for (i = 0; i < 8; i++) - dst[i] = av_clip_uint8(ptr[i] + 128); - dst += stride; - ptr += 8; - } -} |