FFmpeg: tools/fourcc2pixfmt.c Source File

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fourcc2pixfmt.c

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1 /*

3 *

4 * This file is part of FFmpeg.

5 *

6 * FFmpeg is free software; you can redistribute it and/or

7 * modify it under the terms of the GNU Lesser General Public

8 * License as published by the Free Software Foundation; either

9 * version 2.1 of the License, or (at your option) any later version.

10 *

11 * FFmpeg is distributed in the hope that it will be useful,

12 * but WITHOUT ANY WARRANTY; without even the implied warranty of

13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

14 * Lesser General Public License for more details.

15 *

16 * You should have received a copy of the GNU Lesser General Public

17 * License along with FFmpeg; if not, write to the Free Software

18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

19 */

21 #include "config.h"

22 #if HAVE_UNISTD_H

23 #include <unistd.h> /* getopt */

24 #endif

26 #include "libavutil/pixdesc.h"

27 #include "libavcodec/avcodec.h"

28 #include "libavutil/common.h"

29 #include "libavcodec/raw.h"

31 #undef printf

32 #undef fprintf

34 #if !HAVE_GETOPT

35 #include "compat/getopt.c"

36 #endif

38 static void usage(void)

39 {

40 printf("Show the relationships between rawvideo pixel formats and FourCC tags.\n");

41 printf("usage: fourcc2pixfmt [OPTIONS]\n");

42 printf("\n"

43 "Options:\n"

44 "-l list the pixel format for each fourcc\n"

45 "-L list the fourccs for each pixel format\n"

46 "-p PIX_FMT given a pixel format, print the list of associated fourccs (one per line)\n"

47 "-h print this help\n");

48 }

50 static void print_pix_fmt_fourccs(enum AVPixelFormat pix_fmt, const PixelFormatTag *pix_fmt_tags, char sep)

51 {

52 int i;

54 for (i = 0; pix_fmt_tags[i].pix_fmt != AV_PIX_FMT_NONE; i++)

55 if (pix_fmt_tags[i].pix_fmt == pix_fmt)

56 printf("%s%c", av_fourcc2str(pix_fmt_tags[i].fourcc), sep);

57 }

59 int main(int argc, char **argv)

60 {

61 int i, list_fourcc_pix_fmt = 0, list_pix_fmt_fourccs = 0;

62 const PixelFormatTag *pix_fmt_tags = avpriv_get_raw_pix_fmt_tags();

63 const char *pix_fmt_name = NULL;

64 char c;

66 if (argc == 1) {

67 usage();

68 return 0;

69 }

71 while ((c = getopt(argc, argv, "hp:lL")) != -1) {

72 switch (c) {

73 case 'h':

74 usage();

75 return 0;

76 case 'l':

77 list_fourcc_pix_fmt = 1;

78 break;

79 case 'L':

80 list_pix_fmt_fourccs = 1;

81 break;

82 case 'p':

83 pix_fmt_name = optarg;

84 break;

85 case '?':

86 usage();

87 return 1;

88 }

89 }

91 if (list_fourcc_pix_fmt)

92 for (i = 0; pix_fmt_tags[i].pix_fmt != AV_PIX_FMT_NONE; i++)

93 printf("%s: %s\n", av_fourcc2str(pix_fmt_tags[i].fourcc),

94 av_get_pix_fmt_name(pix_fmt_tags[i].pix_fmt));

96 if (list_pix_fmt_fourccs) {

97 for (i = 0; av_pix_fmt_desc_get(i); i++) {

98 const AVPixFmtDescriptor *pix_desc = av_pix_fmt_desc_get(i);

99 if (!pix_desc->name || pix_desc->flags & AV_PIX_FMT_FLAG_HWACCEL)

100 continue;

101 printf("%s: ", pix_desc->name);

102 print_pix_fmt_fourccs(i, pix_fmt_tags, ' ');

103 printf("\n");

104 }

105 }

106

107 if (pix_fmt_name) {

108 enum AVPixelFormat pix_fmt = av_get_pix_fmt(pix_fmt_name);

109 if (pix_fmt == AV_PIX_FMT_NONE) {

110 fprintf(stderr, "Invalid pixel format selected '%s'\n", pix_fmt_name);

111 return 1;

112 }

113 print_pix_fmt_fourccs(pix_fmt, pix_fmt_tags, '\n');

114 }

115

116 return 0;

117 }

AVPixelFormat

Pixel format.

Definition: pixfmt.h:71

avpriv_get_raw_pix_fmt_tags

const struct PixelFormatTag * avpriv_get_raw_pix_fmt_tags(void)

Definition: raw.c:303

PixelFormatTag

Definition: raw.h:32

av_pix_fmt_desc_get

const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)

Definition: pixdesc.c:2965

pixdesc.h

AVPixFmtDescriptor::name

const char * name

Definition: pixdesc.h:70

AV_PIX_FMT_FLAG_HWACCEL

#define AV_PIX_FMT_FLAG_HWACCEL

Pixel format is an HW accelerated format.

Definition: pixdesc.h:128

PixelFormatTag::pix_fmt

enum AVPixelFormat pix_fmt

Definition: raw.h:33

raw.h

getopt

static int getopt(int argc, char *argv[], char *opts)

Definition: getopt.c:41

pix_fmt

static enum AVPixelFormat pix_fmt

Definition: demux_decode.c:41

NULL

#define NULL

Definition: coverity.c:32

AVPixFmtDescriptor::flags

uint64_t flags

Combination of AV_PIX_FMT_FLAG_...

Definition: pixdesc.h:94

Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c

Definition: undefined.txt:32

print_pix_fmt_fourccs

static void print_pix_fmt_fourccs(enum AVPixelFormat pix_fmt, const PixelFormatTag *pix_fmt_tags, char sep)

Definition: fourcc2pixfmt.c:50

printf

printf("static const uint8_t my_array[100] = {\n")

main

int main(int argc, char **argv)

Definition: fourcc2pixfmt.c:59

#define i(width, name, range_min, range_max)

Definition: cbs_h2645.c:256

common.h