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/*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef AVFILTER_OPENCL_H
#define AVFILTER_OPENCL_H
// The intended target is OpenCL 1.2, so disable warnings for APIs
// deprecated after that. This primarily applies to clCreateCommandQueue(),
// we can't use the replacement clCreateCommandQueueWithProperties() because
// it was introduced in OpenCL 2.0.
#define CL_USE_DEPRECATED_OPENCL_1_2_APIS
#include "libavutil/buffer.h"
#include "libavutil/hwcontext.h"
#include "libavutil/hwcontext_opencl.h"
#include "libavutil/pixfmt.h"
#include "avfilter.h"
typedef struct OpenCLFilterContext {
const AVClass *class;
AVBufferRef *device_ref;
AVHWDeviceContext *device;
AVOpenCLDeviceContext *hwctx;
cl_program program;
enum AVPixelFormat output_format;
int output_width;
int output_height;
} OpenCLFilterContext;
/**
* set argument to specific Kernel.
* This macro relies on usage of local label "fail" and variables:
* avctx, cle and err.
*/
#define CL_SET_KERNEL_ARG(kernel, arg_num, type, arg) \
cle = clSetKernelArg(kernel, arg_num, sizeof(type), arg); \
if (cle != CL_SUCCESS) { \
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel " \
"argument %d: error %d.\n", arg_num, cle); \
err = AVERROR(EIO); \
goto fail; \
}
/**
* Return that all inputs and outputs support only AV_PIX_FMT_OPENCL.
*/
int ff_opencl_filter_query_formats(AVFilterContext *avctx);
/**
* Check that the input link contains a suitable hardware frames
* context and extract the device from it.
*/
int ff_opencl_filter_config_input(AVFilterLink *inlink);
/**
* Create a suitable hardware frames context for the output.
*/
int ff_opencl_filter_config_output(AVFilterLink *outlink);
/**
* Initialise an OpenCL filter context.
*/
int ff_opencl_filter_init(AVFilterContext *avctx);
/**
* Uninitialise an OpenCL filter context.
*/
void ff_opencl_filter_uninit(AVFilterContext *avctx);
/**
* Load a new OpenCL program from strings in memory.
*
* Creates a new program and compiles it for the current device.
* Will log any build errors if compilation fails.
*/
int ff_opencl_filter_load_program(AVFilterContext *avctx,
const char **program_source_array,
int nb_strings);
/**
* Load a new OpenCL program from a file.
*
* Same as ff_opencl_filter_load_program(), but from a file.
*/
int ff_opencl_filter_load_program_from_file(AVFilterContext *avctx,
const char *filename);
/**
* Find the work size needed needed for a given plane of an image.
*/
int ff_opencl_filter_work_size_from_image(AVFilterContext *avctx,
size_t *work_size,
AVFrame *frame, int plane,
int block_alignment);
#endif /* AVFILTER_OPENCL_H */
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