35bb74900b
* commit 'c67b449bebbe0b35c73b203683e77a0a649bc765': dsputil: Split bswap*_buf() off into a separate context Conflicts: configure libavcodec/4xm.c libavcodec/ac3dec.c libavcodec/ac3dec.h libavcodec/apedec.c libavcodec/eamad.c libavcodec/flacenc.c libavcodec/fraps.c libavcodec/huffyuv.c libavcodec/huffyuvdec.c libavcodec/motionpixels.c libavcodec/truemotion2.c libavcodec/x86/Makefile libavcodec/x86/dsputil_init.c Merged-by: Michael Niedermayer <michaelni@gmx.at>
96 lines
2.3 KiB
C
96 lines
2.3 KiB
C
/*
|
|
* huffyuv codec for libavcodec
|
|
*
|
|
* Copyright (c) 2002-2014 Michael Niedermayer <michaelni@gmx.at>
|
|
*
|
|
* see http://www.pcisys.net/~melanson/codecs/huffyuv.txt for a description of
|
|
* the algorithm used
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
/**
|
|
* @file
|
|
* huffyuv codec for libavcodec.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
|
|
#include "libavutil/mem.h"
|
|
|
|
#include "avcodec.h"
|
|
#include "bswapdsp.h"
|
|
#include "huffyuv.h"
|
|
|
|
int ff_huffyuv_generate_bits_table(uint32_t *dst, const uint8_t *len_table, int n)
|
|
{
|
|
int len, index;
|
|
uint32_t bits = 0;
|
|
|
|
for (len = 32; len > 0; len--) {
|
|
for (index = 0; index < n; index++) {
|
|
if (len_table[index] == len)
|
|
dst[index] = bits++;
|
|
}
|
|
if (bits & 1) {
|
|
av_log(NULL, AV_LOG_ERROR, "Error generating huffman table\n");
|
|
return -1;
|
|
}
|
|
bits >>= 1;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
av_cold int ff_huffyuv_alloc_temp(HYuvContext *s)
|
|
{
|
|
int i;
|
|
|
|
for (i=0; i<3; i++) {
|
|
s->temp[i]= av_malloc(4*s->width + 16);
|
|
if (!s->temp[i])
|
|
return AVERROR(ENOMEM);
|
|
s->temp16[i] = (uint16_t*)s->temp[i];
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
av_cold void ff_huffyuv_common_init(AVCodecContext *avctx)
|
|
{
|
|
HYuvContext *s = avctx->priv_data;
|
|
|
|
s->avctx = avctx;
|
|
s->flags = avctx->flags;
|
|
|
|
ff_bswapdsp_init(&s->bdsp);
|
|
ff_llviddsp_init(&s->llviddsp, avctx);
|
|
|
|
s->width = avctx->width;
|
|
s->height = avctx->height;
|
|
|
|
av_assert1(s->width > 0 && s->height > 0);
|
|
}
|
|
|
|
av_cold void ff_huffyuv_common_end(HYuvContext *s)
|
|
{
|
|
int i;
|
|
|
|
for(i = 0; i < 3; i++) {
|
|
av_freep(&s->temp[i]);
|
|
s->temp16[i] = NULL;
|
|
}
|
|
}
|