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display: add matrix flip api

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This commit is contained in:
Vittorio Giovara 2014-06-18 18:08:20 -04:00
parent 33a7b453a8
commit a54f03bf07
4 changed files with 24 additions and 2 deletions
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3
doc/APIchanges
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@ -13,6 +13,9 @@ libavutil: 2013-12-xx
API changes, most recent first:
2014-07-xx - xxxxxxx - lavu 53.18.0 - display.h
Add av_display_matrix_flip() to flip the transformation matrix.
2014-07-xx - xxxxxxx - lavc 55.56.0 - dv_profile.h
Add a public API for DV profile handling.

10
libavutil/display.c
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@ -63,3 +63,13 @@ void av_display_rotation_set(int32_t matrix[9], double angle)
matrix[4] = CONV_DB(c);
matrix[8] = 1 << 30;
}
void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip)
{
int i;
const int flip[] = { 1 - 2 * (!!hflip), 1 - 2 * (!!vflip), 1 };
if (hflip || vflip)
for (i = 0; i < 9; i++)
matrix[i] *= flip[i % 3];
}

9
libavutil/display.h
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@ -74,4 +74,13 @@ double av_display_rotation_get(const int32_t matrix[9]);
*/
void av_display_rotation_set(int32_t matrix[9], double angle);
/**
* Flip the input matrix horizontally and/or vertically.
*
* @param matrix an allocated transformation matrix
* @param hflip whether the matrix should be flipped horizontally
* @param vflip whether the matrix should be flipped vertically
*/
void av_display_matrix_flip(int32_t matrix[9], int hflip, int vflip);
#endif /* AVUTIL_DISPLAY_H */

4
libavutil/version.h
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@ -54,8 +54,8 @@
*/
#define LIBAVUTIL_VERSION_MAJOR 53
#define LIBAVUTIL_VERSION_MINOR 17
#define LIBAVUTIL_VERSION_MICRO 1
#define LIBAVUTIL_VERSION_MINOR 18
#define LIBAVUTIL_VERSION_MICRO 0
#define LIBAVUTIL_VERSION_INT AV_VERSION_INT(LIBAVUTIL_VERSION_MAJOR, \
LIBAVUTIL_VERSION_MINOR, \