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lavfi/opencl: add ff_opencl_print_const_matrix_3x3() 

This is used to print a 3x3 matrix into a part of OpenCL
source code.

Signed-off-by: Ruiling Song <ruiling.song@intel.com>
This commit is contained in:
Ruiling Song 2019-01-22 14:47:54 +08:00
parent d0f3798b4e
commit 2593122a16
2 changed files with 21 additions and 0 deletions
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13
libavfilter/opencl.c
View File

@ -337,3 +337,16 @@ int ff_opencl_filter_work_size_from_image(AVFilterContext *avctx,
return 0;
}
void ff_opencl_print_const_matrix_3x3(AVBPrint *buf, const char *name_str,
double mat[3][3])
{
int i, j;
av_bprintf(buf, "__constant float %s[9] = {\n", name_str);
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++)
av_bprintf(buf, " %.5ff,", mat[i][j]);
av_bprintf(buf, "\n");
}
av_bprintf(buf, "};\n");
}

8
libavfilter/opencl.h
View File

@ -25,6 +25,7 @@
// it was introduced in OpenCL 2.0.
#define CL_USE_DEPRECATED_OPENCL_1_2_APIS
#include "libavutil/bprint.h"
#include "libavutil/buffer.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_opencl.h"
@ -124,5 +125,12 @@ int ff_opencl_filter_work_size_from_image(AVFilterContext *avctx,
size_t *work_size,
AVFrame *frame, int plane,
int block_alignment);
/**
* Print a 3x3 matrix into a buffer as __constant array, which could
* be included in an OpenCL program.
*/
void ff_opencl_print_const_matrix_3x3(AVBPrint *buf, const char *name_str,
double mat[3][3]);
#endif /* AVFILTER_OPENCL_H */