LCOV - code coverage report
Current view: top level - libavcodec - huffyuvdsp.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 32 42 76.2 %
Date: 2017-12-11 04:34:20 Functions: 3 4 75.0 %

          Line data    Source code
       1             : /*
       2             :  * This file is part of FFmpeg.
       3             :  *
       4             :  * FFmpeg is free software; you can redistribute it and/or
       5             :  * modify it under the terms of the GNU Lesser General Public
       6             :  * License as published by the Free Software Foundation; either
       7             :  * version 2.1 of the License, or (at your option) any later version.
       8             :  *
       9             :  * FFmpeg is distributed in the hope that it will be useful,
      10             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      11             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12             :  * Lesser General Public License for more details.
      13             :  *
      14             :  * You should have received a copy of the GNU Lesser General Public
      15             :  * License along with FFmpeg; if not, write to the Free Software
      16             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      17             :  */
      18             : 
      19             : #include <stdint.h>
      20             : 
      21             : #include "config.h"
      22             : #include "libavutil/attributes.h"
      23             : #include "mathops.h"
      24             : #include "huffyuvdsp.h"
      25             : 
      26             : // 0x00010001 or 0x0001000100010001 or whatever, depending on the cpu's native arithmetic size
      27             : #define pw_1 (ULONG_MAX / UINT16_MAX)
      28             : 
      29      134100 : static void add_int16_c(uint16_t *dst, const uint16_t *src, unsigned mask, int w){
      30             :     long i;
      31      134100 :     unsigned long pw_lsb = (mask >> 1) * pw_1;
      32      134100 :     unsigned long pw_msb = pw_lsb +  pw_1;
      33    11538900 :     for (i = 0; i <= w - (int)sizeof(long)/2; i += sizeof(long)/2) {
      34    11404800 :         long a = *(long*)(src+i);
      35    11404800 :         long b = *(long*)(dst+i);
      36    11404800 :         *(long*)(dst+i) = ((a&pw_lsb) + (b&pw_lsb)) ^ ((a^b)&pw_msb);
      37             :     }
      38      144000 :     for(; i<w; i++)
      39        9900 :         dst[i] = (dst[i] + src[i]) & mask;
      40      134100 : }
      41             : 
      42           0 : static void add_hfyu_median_pred_int16_c(uint16_t *dst, const uint16_t *src, const uint16_t *diff, unsigned mask, int w, int *left, int *left_top){
      43             :     int i;
      44             :     uint16_t l, lt;
      45             : 
      46           0 :     l  = *left;
      47           0 :     lt = *left_top;
      48             : 
      49           0 :     for(i=0; i<w; i++){
      50           0 :         l  = (mid_pred(l, src[i], (l + src[i] - lt) & mask) + diff[i]) & mask;
      51           0 :         lt = src[i];
      52           0 :         dst[i] = l;
      53             :     }
      54             : 
      55           0 :     *left     = l;
      56           0 :     *left_top = lt;
      57           0 : }
      58             : 
      59       89800 : static void add_hfyu_left_pred_bgr32_c(uint8_t *dst, const uint8_t *src,
      60             :                                        intptr_t w, uint8_t *left)
      61             : {
      62             :     int i;
      63       89800 :     uint8_t r = left[R], g = left[G], b = left[B], a = left[A];
      64             : 
      65    30617800 :     for (i = 0; i < w; i++) {
      66    30528000 :         b += src[4 * i + B];
      67    30528000 :         g += src[4 * i + G];
      68    30528000 :         r += src[4 * i + R];
      69    30528000 :         a += src[4 * i + A];
      70             : 
      71    30528000 :         dst[4 * i + B] = b;
      72    30528000 :         dst[4 * i + G] = g;
      73    30528000 :         dst[4 * i + R] = r;
      74    30528000 :         dst[4 * i + A] = a;
      75             :     }
      76             : 
      77       89800 :     left[B] = b;
      78       89800 :     left[G] = g;
      79       89800 :     left[R] = r;
      80       89800 :     left[A] = a;
      81       89800 : }
      82             : 
      83          69 : av_cold void ff_huffyuvdsp_init(HuffYUVDSPContext *c, enum AVPixelFormat pix_fmt)
      84             : {
      85          69 :     c->add_int16 = add_int16_c;
      86          69 :     c->add_hfyu_median_pred_int16 = add_hfyu_median_pred_int16_c;
      87          69 :     c->add_hfyu_left_pred_bgr32 = add_hfyu_left_pred_bgr32_c;
      88             : 
      89             :     if (ARCH_X86)
      90          69 :         ff_huffyuvdsp_init_x86(c, pix_fmt);
      91          69 : }

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