FFmpeg
imgconvert.c
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1 /*
2  * Misc image conversion routines
3  * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 /**
23  * @file
24  * misc image conversion routines
25  */
26 
27 #include "avcodec.h"
28 #include "libavutil/pixdesc.h"
29 #include "libavutil/pixfmt.h"
30 
32  enum AVPixelFormat src_pix_fmt,
33  int has_alpha, int *loss_ptr){
34  int i;
35 
36  enum AVPixelFormat best = AV_PIX_FMT_NONE;
37  int loss;
38 
39  for (i=0; pix_fmt_list[i] != AV_PIX_FMT_NONE; i++) {
40  loss = loss_ptr ? *loss_ptr : 0;
41  best = av_find_best_pix_fmt_of_2(best, pix_fmt_list[i], src_pix_fmt, has_alpha, &loss);
42  }
43 
44  if (loss_ptr)
45  *loss_ptr = loss;
46  return best;
47 }
48 
AVPixelFormat
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
pixdesc.h
avcodec_find_best_pix_fmt_of_list
enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Find the best pixel format to convert to given a certain source pixel format.
Definition: imgconvert.c:31
i
int i
Definition: input.c:406
avcodec.h
pixfmt.h
av_find_best_pix_fmt_of_2
enum AVPixelFormat av_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Compute what kind of losses will occur when converting from one specific pixel format to another.
Definition: pixdesc.c:2831
AV_PIX_FMT_NONE
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65