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300 lines
14 KiB
C
300 lines
14 KiB
C
/*
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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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#ifndef AVFILTER_OPENCL_H
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#define AVFILTER_OPENCL_H
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// The intended target is OpenCL 1.2, so disable warnings for APIs
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// deprecated after that. This primarily applies to clCreateCommandQueue(),
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// we can't use the replacement clCreateCommandQueueWithProperties() because
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// it was introduced in OpenCL 2.0.
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#define CL_USE_DEPRECATED_OPENCL_1_2_APIS
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#include "libavutil/bprint.h"
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#include "libavutil/buffer.h"
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#include "libavutil/hwcontext.h"
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#include "libavutil/hwcontext_opencl.h"
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#include "libavutil/pixfmt.h"
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#include "avfilter.h"
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typedef struct OpenCLFilterContext {
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const AVClass *class;
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AVBufferRef *device_ref;
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AVHWDeviceContext *device;
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AVOpenCLDeviceContext *hwctx;
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cl_program program;
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enum AVPixelFormat output_format;
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int output_width;
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int output_height;
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} OpenCLFilterContext;
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// Groups together information about a kernel argument
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typedef struct OpenCLKernelArg {
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size_t arg_size;
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const void *arg_val;
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} OpenCLKernelArg;
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/**
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* set argument to specific Kernel.
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* This macro relies on usage of local label "fail" and variables:
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* avctx, cle and err.
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*/
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#define CL_SET_KERNEL_ARG(kernel, arg_num, type, arg) \
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cle = clSetKernelArg(kernel, arg_num, sizeof(type), arg); \
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if (cle != CL_SUCCESS) { \
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av_log(avctx, AV_LOG_ERROR, "Failed to set kernel " \
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"argument %d: error %d.\n", arg_num, cle); \
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err = AVERROR(EIO); \
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goto fail; \
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}
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/**
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* A helper macro to handle OpenCL errors. It will assign errcode to
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* variable err, log error msg, and jump to fail label on error.
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*/
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#define CL_FAIL_ON_ERROR(errcode, ...) do { \
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if (cle != CL_SUCCESS) { \
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av_log(avctx, AV_LOG_ERROR, __VA_ARGS__); \
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err = errcode; \
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goto fail; \
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} \
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} while(0)
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/**
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* Create a kernel with the given name.
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*
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* The kernel variable in the context structure must have a name of the form
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* kernel_<kernel_name>.
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*
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* The OpenCLFilterContext variable in the context structure must be named ocf.
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*
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* Requires the presence of a local cl_int variable named cle and a fail label for error
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* handling.
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*/
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#define CL_CREATE_KERNEL(ctx, kernel_name) do { \
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ctx->kernel_ ## kernel_name = clCreateKernel(ctx->ocf.program, #kernel_name, &cle); \
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create %s kernel: %d.\n", #kernel_name, cle); \
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} while(0)
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/**
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* release an OpenCL Kernel
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*/
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#define CL_RELEASE_KERNEL(k) \
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do { \
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if (k) { \
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cle = clReleaseKernel(k); \
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if (cle != CL_SUCCESS) \
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av_log(avctx, AV_LOG_ERROR, "Failed to release " \
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"OpenCL kernel: %d.\n", cle); \
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} \
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} while(0)
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/**
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* release an OpenCL Memory Object
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*/
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#define CL_RELEASE_MEMORY(m) \
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do { \
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if (m) { \
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cle = clReleaseMemObject(m); \
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if (cle != CL_SUCCESS) \
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av_log(avctx, AV_LOG_ERROR, "Failed to release " \
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"OpenCL memory: %d.\n", cle); \
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} \
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} while(0)
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/**
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* release an OpenCL Command Queue
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*/
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#define CL_RELEASE_QUEUE(q) \
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do { \
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if (q) { \
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cle = clReleaseCommandQueue(q); \
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if (cle != CL_SUCCESS) \
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av_log(avctx, AV_LOG_ERROR, "Failed to release " \
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"OpenCL command queue: %d.\n", cle); \
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} \
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} while(0)
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/**
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* Enqueue a kernel with the given information.
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*
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* Kernel arguments are provided as KernelArg structures and are set in the order
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* that they are passed.
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*
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* Requires the presence of a local cl_int variable named cle and a fail label for error
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* handling.
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*/
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#define CL_ENQUEUE_KERNEL_WITH_ARGS(queue, kernel, global_work_size, local_work_size, event, ...) \
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do { \
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OpenCLKernelArg args[] = {__VA_ARGS__}; \
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for (int i = 0; i < FF_ARRAY_ELEMS(args); i++) { \
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cle = clSetKernelArg(kernel, i, args[i].arg_size, args[i].arg_val); \
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if (cle != CL_SUCCESS) { \
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av_log(avctx, AV_LOG_ERROR, "Failed to set kernel " \
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"argument %d: error %d.\n", i, cle); \
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err = AVERROR(EIO); \
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goto fail; \
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} \
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} \
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\
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cle = clEnqueueNDRangeKernel( \
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queue, \
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kernel, \
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FF_ARRAY_ELEMS(global_work_size), \
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NULL, \
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global_work_size, \
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local_work_size, \
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0, \
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NULL, \
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event \
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); \
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue kernel: %d.\n", cle); \
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} while (0)
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/**
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* Uses the above macro to enqueue the given kernel and then additionally runs it to
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* completion via clFinish.
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*
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* Requires the presence of a local cl_int variable named cle and a fail label for error
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* handling.
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*/
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#define CL_RUN_KERNEL_WITH_ARGS(queue, kernel, global_work_size, local_work_size, event, ...) do { \
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CL_ENQUEUE_KERNEL_WITH_ARGS( \
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queue, kernel, global_work_size, local_work_size, event, __VA_ARGS__ \
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); \
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\
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cle = clFinish(queue); \
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle); \
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} while (0)
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/**
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* Create a buffer with the given information.
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*
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* The buffer variable in the context structure must be named <buffer_name>.
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*
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* Requires the presence of a local cl_int variable named cle and a fail label for error
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* handling.
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*/
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#define CL_CREATE_BUFFER_FLAGS(ctx, buffer_name, flags, size, host_ptr) do { \
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ctx->buffer_name = clCreateBuffer( \
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ctx->ocf.hwctx->context, \
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flags, \
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size, \
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host_ptr, \
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&cle \
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); \
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create buffer %s: %d.\n", #buffer_name, cle); \
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} while(0)
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/**
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* Perform a blocking write to a buffer.
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*
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* Requires the presence of a local cl_int variable named cle and a fail label for error
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* handling.
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*/
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#define CL_BLOCKING_WRITE_BUFFER(queue, buffer, size, host_ptr, event) do { \
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cle = clEnqueueWriteBuffer( \
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queue, \
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buffer, \
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CL_TRUE, \
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0, \
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size, \
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host_ptr, \
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0, \
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NULL, \
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event \
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); \
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to write buffer to device: %d.\n", cle); \
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} while(0)
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/**
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* Create a buffer with the given information.
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*
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* The buffer variable in the context structure must be named <buffer_name>.
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*
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* Requires the presence of a local cl_int variable named cle and a fail label for error
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* handling.
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*/
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#define CL_CREATE_BUFFER(ctx, buffer_name, size) CL_CREATE_BUFFER_FLAGS(ctx, buffer_name, 0, size, NULL)
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/**
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* Check that the input link contains a suitable hardware frames
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* context and extract the device from it.
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*/
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int ff_opencl_filter_config_input(AVFilterLink *inlink);
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/**
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* Create a suitable hardware frames context for the output.
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*/
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int ff_opencl_filter_config_output(AVFilterLink *outlink);
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/**
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* Initialise an OpenCL filter context.
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*/
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int ff_opencl_filter_init(AVFilterContext *avctx);
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/**
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* Uninitialise an OpenCL filter context.
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*/
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void ff_opencl_filter_uninit(AVFilterContext *avctx);
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/**
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* Load a new OpenCL program from strings in memory.
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*
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* Creates a new program and compiles it for the current device.
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* Will log any build errors if compilation fails.
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*/
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int ff_opencl_filter_load_program(AVFilterContext *avctx,
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const char **program_source_array,
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int nb_strings);
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/**
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* Load a new OpenCL program from a file.
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*
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* Same as ff_opencl_filter_load_program(), but from a file.
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*/
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int ff_opencl_filter_load_program_from_file(AVFilterContext *avctx,
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const char *filename);
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/**
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* Find the work size needed needed for a given plane of an image.
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*/
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int ff_opencl_filter_work_size_from_image(AVFilterContext *avctx,
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size_t *work_size,
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AVFrame *frame, int plane,
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int block_alignment);
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/**
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* Print a 3x3 matrix into a buffer as __constant array, which could
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* be included in an OpenCL program.
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*/
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void ff_opencl_print_const_matrix_3x3(AVBPrint *buf, const char *name_str,
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double mat[3][3]);
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/**
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* Gets the command start and end times for the given event and returns the
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* difference (the time that the event took).
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*/
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cl_ulong ff_opencl_get_event_time(cl_event event);
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#endif /* AVFILTER_OPENCL_H */
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