FFmpeg
libavutil
tests
display.c
Go to the documentation of this file.
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/*
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* Copyright (c) 2014 Vittorio Giovara <vittorio.giovara@gmail.com>
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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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#include <stdio.h>
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#include "
libavutil/display.c
"
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static
void
print_matrix
(
int32_t
matrix
[9])
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{
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int
i
, j;
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for
(
i
= 0;
i
< 3; ++
i
) {
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for
(j = 0; j < 3 - 1; ++j)
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printf
(
"%d "
,
matrix
[
i
*3 + j]);
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printf
(
"%d\n"
,
matrix
[
i
*3 + j]);
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}
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}
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int
main
(
void
)
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{
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int32_t
matrix
[9];
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// Set the matrix to 90 degrees
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av_display_rotation_set
(
matrix
, 90);
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print_matrix
(
matrix
);
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printf
(
"degrees: %f\n"
,
av_display_rotation_get
(
matrix
));
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// Set the matrix to -45 degrees
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av_display_rotation_set
(
matrix
, -45);
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print_matrix
(
matrix
);
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printf
(
"degrees: %f\n"
,
av_display_rotation_get
(
matrix
));
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// flip horizontal
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av_display_matrix_flip
(
matrix
, 1, 0);
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print_matrix
(
matrix
);
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printf
(
"degrees: %f\n"
,
av_display_rotation_get
(
matrix
));
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// flip vertical
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av_display_matrix_flip
(
matrix
, 0, 1);
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print_matrix
(
matrix
);
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printf
(
"degrees: %f\n"
,
av_display_rotation_get
(
matrix
));
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return
0;
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}
matrix
Definition:
vc1dsp.c:42
av_display_matrix_flip
void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip)
Flip the input matrix horizontally and/or vertically.
Definition:
display.c:66
av_display_rotation_set
void av_display_rotation_set(int32_t matrix[9], double angle)
Initialize a transformation matrix describing a pure clockwise rotation by the specified angle (in de...
Definition:
display.c:51
print_matrix
static void print_matrix(int32_t matrix[9])
Definition:
display.c:24
printf
printf("static const uint8_t my_array[100] = {\n")
display.c
i
#define i(width, name, range_min, range_max)
Definition:
cbs_h2645.c:255
main
int main(void)
Definition:
display.c:36
int32_t
int32_t
Definition:
audioconvert.c:56
av_display_rotation_get
double av_display_rotation_get(const int32_t matrix[9])
Extract the rotation component of the transformation matrix.
Definition:
display.c:35
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