GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavcodec/huffyuv.c Lines: 28 31 90.3 %
Date: 2019-11-18 18:00:01 Branches: 12 14 85.7 %

Line Branch Exec Source
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/*
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 * huffyuv codec for libavcodec
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 *
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 * Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
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 *
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 * see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
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 * the algorithm used
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file
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 * huffyuv codec for libavcodec.
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 */
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#include <stdint.h>
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#include "libavutil/mem.h"
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#include "avcodec.h"
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#include "bswapdsp.h"
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#include "huffyuv.h"
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int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n)
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{
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    int len, index;
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    uint32_t bits = 0;
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    for (len = 32; len > 0; len--) {
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        for (index = 0; index < n; index++) {
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            if (len_table[index] == len)
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                dst[index] = bits++;
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        }
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        if (bits & 1) {
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            av_log(NULL, AV_LOG_ERROR, "Error generating huffman table\n");
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            return -1;
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        }
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        bits >>= 1;
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    }
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    return 0;
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}
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av_cold int ff_huffyuv_alloc_temp(HYuvContext *s)
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{
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    int i;
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    for (i=0; i<3; i++) {
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        s->temp[i]= av_malloc(4*s->width + 16);
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        if (!s->temp[i])
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            return AVERROR(ENOMEM);
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        s->temp16[i] = (uint16_t*)s->temp[i];
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    }
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    return 0;
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}
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av_cold void ff_huffyuv_common_init(AVCodecContext *avctx)
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{
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    HYuvContext *s = avctx->priv_data;
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    s->avctx = avctx;
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    s->flags = avctx->flags;
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    ff_bswapdsp_init(&s->bdsp);
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    s->width = avctx->width;
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    s->height = avctx->height;
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    av_assert1(s->width > 0 && s->height > 0);
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}
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av_cold void ff_huffyuv_common_end(HYuvContext *s)
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{
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    int i;
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    for(i = 0; i < 3; i++) {
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        av_freep(&s->temp[i]);
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        s->temp16[i] = NULL;
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    }
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}