LCOV - code coverage report
Current view: top level - libavcodec - hqxdsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 82 82 100.0 %
Date: 2017-12-14 08:27:08 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * HQX DSP routines
       3             :  *
       4             :  * This file is part of FFmpeg.
       5             :  *
       6             :  * FFmpeg is free software; you can redistribute it and/or
       7             :  * modify it under the terms of the GNU Lesser General Public
       8             :  * License as published by the Free Software Foundation; either
       9             :  * version 2.1 of the License, or (at your option) any later version.
      10             :  *
      11             :  * FFmpeg is distributed in the hope that it will be useful,
      12             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      13             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      14             :  * Lesser General Public License for more details.
      15             :  *
      16             :  * You should have received a copy of the GNU Lesser General Public
      17             :  * License along with FFmpeg; if not, write to the Free Software
      18             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      19             :  */
      20             : 
      21             : #include <stdint.h>
      22             : 
      23             : #include "libavutil/common.h"
      24             : 
      25             : #include "hqxdsp.h"
      26             : 
      27     1774080 : static inline void idct_col(int16_t *blk, const uint8_t *quant)
      28             : {
      29             :     int t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, tA, tB, tC, tD, tE, tF;
      30             :     int t10, t11, t12, t13;
      31             :     int s0, s1, s2, s3, s4, s5, s6, s7;
      32             : 
      33     1774080 :     s0 = (int) blk[0 * 8] * quant[0 * 8];
      34     1774080 :     s1 = (int) blk[1 * 8] * quant[1 * 8];
      35     1774080 :     s2 = (int) blk[2 * 8] * quant[2 * 8];
      36     1774080 :     s3 = (int) blk[3 * 8] * quant[3 * 8];
      37     1774080 :     s4 = (int) blk[4 * 8] * quant[4 * 8];
      38     1774080 :     s5 = (int) blk[5 * 8] * quant[5 * 8];
      39     1774080 :     s6 = (int) blk[6 * 8] * quant[6 * 8];
      40     1774080 :     s7 = (int) blk[7 * 8] * quant[7 * 8];
      41             : 
      42     1774080 :     t0  =  (int)(s3 * 19266U + s5 * 12873U) >> 15;
      43     1774080 :     t1  =  (int)(s5 * 19266U - s3 * 12873U) >> 15;
      44     1774080 :     t2  = ((int)(s7 * 4520U  + s1 * 22725U) >> 15) - t0;
      45     1774080 :     t3  = ((int)(s1 * 4520U  - s7 * 22725U) >> 15) - t1;
      46     1774080 :     t4  = t0 * 2 + t2;
      47     1774080 :     t5  = t1 * 2 + t3;
      48     1774080 :     t6  = t2 - t3;
      49     1774080 :     t7  = t3 * 2 + t6;
      50     1774080 :     t8  = (int)(t6 * 11585U) >> 14;
      51     1774080 :     t9  = (int)(t7 * 11585U) >> 14;
      52     1774080 :     tA  = (int)(s2 * 8867U - s6 * 21407U) >> 14;
      53     1774080 :     tB  = (int)(s6 * 8867U + s2 * 21407U) >> 14;
      54     1774080 :     tC  = (s0 >> 1) - (s4 >> 1);
      55     1774080 :     tD  = (s4 >> 1) * 2 + tC;
      56     1774080 :     tE  = tC - (tA >> 1);
      57     1774080 :     tF  = tD - (tB >> 1);
      58     1774080 :     t10 = tF - t5;
      59     1774080 :     t11 = tE - t8;
      60     1774080 :     t12 = tE + (tA >> 1) * 2 - t9;
      61     1774080 :     t13 = tF + (tB >> 1) * 2 - t4;
      62             : 
      63     1774080 :     blk[0 * 8] = t13 + t4 * 2;
      64     1774080 :     blk[1 * 8] = t12 + t9 * 2;
      65     1774080 :     blk[2 * 8] = t11 + t8 * 2;
      66     1774080 :     blk[3 * 8] = t10 + t5 * 2;
      67     1774080 :     blk[4 * 8] = t10;
      68     1774080 :     blk[5 * 8] = t11;
      69     1774080 :     blk[6 * 8] = t12;
      70     1774080 :     blk[7 * 8] = t13;
      71     1774080 : }
      72             : 
      73     1774080 : static inline void idct_row(int16_t *blk)
      74             : {
      75             :     int t0, t1, t2, t3, t4, t5, t6, t7, t8, t9, tA, tB, tC, tD, tE, tF;
      76             :     int t10, t11, t12, t13;
      77             : 
      78     1774080 :     t0  =  (blk[3] * 19266 + blk[5] * 12873) >> 14;
      79     1774080 :     t1  =  (blk[5] * 19266 - blk[3] * 12873) >> 14;
      80     1774080 :     t2  = ((blk[7] * 4520  + blk[1] * 22725) >> 14) - t0;
      81     1774080 :     t3  = ((blk[1] * 4520  - blk[7] * 22725) >> 14) - t1;
      82     1774080 :     t4  = t0 * 2 + t2;
      83     1774080 :     t5  = t1 * 2 + t3;
      84     1774080 :     t6  = t2 - t3;
      85     1774080 :     t7  = t3 * 2 + t6;
      86     1774080 :     t8  = (t6 * 11585) >> 14;
      87     1774080 :     t9  = (t7 * 11585) >> 14;
      88     1774080 :     tA  = (blk[2] * 8867 - blk[6] * 21407) >> 14;
      89     1774080 :     tB  = (blk[6] * 8867 + blk[2] * 21407) >> 14;
      90     1774080 :     tC  = blk[0] - blk[4];
      91     1774080 :     tD  = blk[4] * 2 + tC;
      92     1774080 :     tE  = tC - tA;
      93     1774080 :     tF  = tD - tB;
      94     1774080 :     t10 = tF - t5;
      95     1774080 :     t11 = tE - t8;
      96     1774080 :     t12 = tE + tA * 2 - t9;
      97     1774080 :     t13 = tF + tB * 2 - t4;
      98             : 
      99     1774080 :     blk[0] = (t13 + t4 * 2 + 4) >> 3;
     100     1774080 :     blk[1] = (t12 + t9 * 2 + 4) >> 3;
     101     1774080 :     blk[2] = (t11 + t8 * 2 + 4) >> 3;
     102     1774080 :     blk[3] = (t10 + t5 * 2 + 4) >> 3;
     103     1774080 :     blk[4] = (t10          + 4) >> 3;
     104     1774080 :     blk[5] = (t11          + 4) >> 3;
     105     1774080 :     blk[6] = (t12          + 4) >> 3;
     106     1774080 :     blk[7] = (t13          + 4) >> 3;
     107     1774080 : }
     108             : 
     109      221760 : static void hqx_idct_put(uint16_t *dst, ptrdiff_t stride,
     110             :                          int16_t *block, const uint8_t *quant)
     111             : {
     112             :     int i, j;
     113             : 
     114     1995840 :     for (i = 0; i < 8; i++)
     115     1774080 :         idct_col(block + i, quant + i);
     116     1995840 :     for (i = 0; i < 8; i++)
     117     1774080 :         idct_row(block + i * 8);
     118             : 
     119     1995840 :     for (i = 0; i < 8; i++) {
     120    15966720 :         for (j = 0; j < 8; j++) {
     121    14192640 :             int v = av_clip_uintp2(block[j + i * 8] + 0x800, 12);
     122    14192640 :             dst[j] = (v << 4) | (v >> 8);
     123             :         }
     124     1774080 :         dst += stride >> 1;
     125             :     }
     126      221760 : }
     127             : 
     128           4 : av_cold void ff_hqxdsp_init(HQXDSPContext *c)
     129             : {
     130           4 :     c->idct_put = hqx_idct_put;
     131           4 : }

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