LCOV - code coverage report
Current view: top level - libavcodec - huffyuv.c (source / functions) Hit Total Coverage
Test: coverage.info Lines: 28 31 90.3 %
Date: 2017-12-17 04:34:43 Functions: 4 4 100.0 %

          Line data    Source code
       1             : /*
       2             :  * huffyuv codec for libavcodec
       3             :  *
       4             :  * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
       5             :  *
       6             :  * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
       7             :  * the algorithm used
       8             :  *
       9             :  * This file is part of FFmpeg.
      10             :  *
      11             :  * FFmpeg is free software; you can redistribute it and/or
      12             :  * modify it under the terms of the GNU Lesser General Public
      13             :  * License as published by the Free Software Foundation; either
      14             :  * version 2.1 of the License, or (at your option) any later version.
      15             :  *
      16             :  * FFmpeg is distributed in the hope that it will be useful,
      17             :  * but WITHOUT ANY WARRANTY; without even the implied warranty of
      18             :  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      19             :  * Lesser General Public License for more details.
      20             :  *
      21             :  * You should have received a copy of the GNU Lesser General Public
      22             :  * License along with FFmpeg; if not, write to the Free Software
      23             :  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
      24             :  */
      25             : 
      26             : /**
      27             :  * @file
      28             :  * huffyuv codec for libavcodec.
      29             :  */
      30             : 
      31             : #include <stdint.h>
      32             : 
      33             : #include "libavutil/mem.h"
      34             : 
      35             : #include "avcodec.h"
      36             : #include "bswapdsp.h"
      37             : #include "huffyuv.h"
      38             : 
      39         303 : int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n)
      40             : {
      41             :     int len, index;
      42         303 :     uint32_t bits = 0;
      43             : 
      44        9999 :     for (len = 32; len > 0; len--) {
      45    26379744 :         for (index = 0; index < n; index++) {
      46    26370048 :             if (len_table[index] == len)
      47      824064 :                 dst[index] = bits++;
      48             :         }
      49        9696 :         if (bits & 1) {
      50           0 :             av_log(NULL, AV_LOG_ERROR, "Error generating huffman table\n");
      51           0 :             return -1;
      52             :         }
      53        9696 :         bits >>= 1;
      54             :     }
      55         303 :     return 0;
      56             : }
      57             : 
      58         101 : av_cold int ff_huffyuv_alloc_temp(HYuvContext *s)
      59             : {
      60             :     int i;
      61             : 
      62         404 :     for (i=0; i<3; i++) {
      63         303 :         s->temp[i]= av_malloc(4*s->width + 16);
      64         303 :         if (!s->temp[i])
      65           0 :             return AVERROR(ENOMEM);
      66         303 :         s->temp16[i] = (uint16_t*)s->temp[i];
      67             :     }
      68         101 :     return 0;
      69             : }
      70             : 
      71         101 : av_cold void ff_huffyuv_common_init(AVCodecContext *avctx)
      72             : {
      73         101 :     HYuvContext *s = avctx->priv_data;
      74             : 
      75         101 :     s->avctx = avctx;
      76         101 :     s->flags = avctx->flags;
      77             : 
      78         101 :     ff_bswapdsp_init(&s->bdsp);
      79             : 
      80         101 :     s->width = avctx->width;
      81         101 :     s->height = avctx->height;
      82             : 
      83             :     av_assert1(s->width > 0 && s->height > 0);
      84         101 : }
      85             : 
      86         101 : av_cold void ff_huffyuv_common_end(HYuvContext *s)
      87             : {
      88             :     int i;
      89             : 
      90         404 :     for(i = 0; i < 3; i++) {
      91         303 :         av_freep(&s->temp[i]);
      92         303 :         s->temp16[i] = NULL;
      93             :     }
      94         101 : }

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