forked from KolibriOS/kolibrios
288 lines
9.2 KiB
C
288 lines
9.2 KiB
C
/*
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* Copyright (C) 2012 Peng Gao <peng@multicorewareinc.com>
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* Copyright (C) 2012 Li Cao <li@multicorewareinc.com>
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* Copyright (C) 2012 Wei Gao <weigao@multicorewareinc.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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/**
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* @file
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* OpenCL wrapper
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*
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* This interface is considered still experimental and its API and ABI may
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* change without prior notice.
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*/
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#ifndef LIBAVUTIL_OPENCL_H
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#define LIBAVUTIL_OPENCL_H
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#include "config.h"
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#if HAVE_CL_CL_H
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#include <CL/cl.h>
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#else
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#include <OpenCL/cl.h>
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#endif
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#include "dict.h"
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#define AV_OPENCL_KERNEL( ... )# __VA_ARGS__
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#define AV_OPENCL_MAX_KERNEL_NAME_SIZE 150
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#define AV_OPENCL_MAX_DEVICE_NAME_SIZE 100
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#define AV_OPENCL_MAX_PLATFORM_NAME_SIZE 100
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typedef struct {
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int device_type;
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char device_name[AV_OPENCL_MAX_DEVICE_NAME_SIZE];
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cl_device_id device_id;
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} AVOpenCLDeviceNode;
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typedef struct {
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cl_platform_id platform_id;
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char platform_name[AV_OPENCL_MAX_PLATFORM_NAME_SIZE];
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int device_num;
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AVOpenCLDeviceNode **device_node;
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} AVOpenCLPlatformNode;
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typedef struct {
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int platform_num;
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AVOpenCLPlatformNode **platform_node;
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} AVOpenCLDeviceList;
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typedef struct {
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cl_command_queue command_queue;
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cl_kernel kernel;
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char kernel_name[AV_OPENCL_MAX_KERNEL_NAME_SIZE];
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} AVOpenCLKernelEnv;
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typedef struct {
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cl_platform_id platform_id;
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cl_device_type device_type;
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cl_context context;
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cl_device_id device_id;
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cl_command_queue command_queue;
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char *platform_name;
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} AVOpenCLExternalEnv;
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/**
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* Get OpenCL device list.
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*
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* It must be freed with av_opencl_free_device_list().
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*
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* @param device_list pointer to OpenCL environment device list,
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* should be released by av_opencl_free_device_list()
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*
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_get_device_list(AVOpenCLDeviceList **device_list);
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/**
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* Free OpenCL device list.
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*
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* @param device_list pointer to OpenCL environment device list
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* created by av_opencl_get_device_list()
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*/
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void av_opencl_free_device_list(AVOpenCLDeviceList **device_list);
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/**
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* Set option in the global OpenCL context.
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*
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* This options affect the operation performed by the next
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* av_opencl_init() operation.
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*
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* The currently accepted options are:
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* - build_options: set options to compile registered kernels code
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* - platform: set index of platform in device list
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* - device: set index of device in device list
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*
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* See reference "OpenCL Specification Version: 1.2 chapter 5.6.4".
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*
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* @param key option key
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* @param val option value
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* @return >=0 on success, a negative error code in case of failure
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* @see av_opencl_get_option()
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*/
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int av_opencl_set_option(const char *key, const char *val);
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/**
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* Get option value from the global OpenCL context.
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*
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* @param key option key
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* @param out_val pointer to location where option value will be
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* written, must be freed with av_freep()
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* @return >=0 on success, a negative error code in case of failure
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* @see av_opencl_set_option()
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*/
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int av_opencl_get_option(const char *key, uint8_t **out_val);
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/**
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* Free option values of the global OpenCL context.
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*
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*/
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void av_opencl_free_option(void);
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/**
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* Allocate OpenCL external environment.
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*
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* It must be freed with av_opencl_free_external_env().
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*
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* @return pointer to allocated OpenCL external environment
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*/
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AVOpenCLExternalEnv *av_opencl_alloc_external_env(void);
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/**
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* Free OpenCL external environment.
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*
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* @param ext_opencl_env pointer to OpenCL external environment
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* created by av_opencl_alloc_external_env()
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*/
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void av_opencl_free_external_env(AVOpenCLExternalEnv **ext_opencl_env);
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/**
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* Get OpenCL error string.
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*
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* @param status OpenCL error code
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* @return OpenCL error string
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*/
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const char *av_opencl_errstr(cl_int status);
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/**
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* Register kernel code.
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*
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* The registered kernel code is stored in a global context, and compiled
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* in the runtime environment when av_opencl_init() is called.
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*
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* @param kernel_code kernel code to be compiled in the OpenCL runtime environment
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_register_kernel_code(const char *kernel_code);
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/**
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* Initialize the run time OpenCL environment and compile the kernel
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* code registered with av_opencl_register_kernel_code().
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*
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* @param ext_opencl_env external OpenCL environment, created by an
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* application program, ignored if set to NULL
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_init(AVOpenCLExternalEnv *ext_opencl_env);
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/**
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* Create kernel object in the specified kernel environment.
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*
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* @param env pointer to kernel environment which is filled with
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* the environment used to run the kernel
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* @param kernel_name kernel function name
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_create_kernel(AVOpenCLKernelEnv *env, const char *kernel_name);
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/**
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* Create OpenCL buffer.
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*
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* The buffer is used to save the data used or created by an OpenCL
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* kernel.
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* The created buffer must be released with av_opencl_buffer_release().
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*
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* See clCreateBuffer() function reference for more information about
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* the parameters.
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*
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* @param cl_buf pointer to OpenCL buffer
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* @param cl_buf_size size in bytes of the OpenCL buffer to create
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* @param flags flags used to control buffer attributes
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* @param host_ptr host pointer of the OpenCL buffer
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_buffer_create(cl_mem *cl_buf, size_t cl_buf_size, int flags, void *host_ptr);
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/**
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* Write OpenCL buffer with data from src_buf.
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*
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* @param dst_cl_buf pointer to OpenCL destination buffer
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* @param src_buf pointer to source buffer
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* @param buf_size size in bytes of the source and destination buffers
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_buffer_write(cl_mem dst_cl_buf, uint8_t *src_buf, size_t buf_size);
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/**
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* Read data from OpenCL buffer to memory buffer.
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*
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* @param dst_buf pointer to destination buffer (CPU memory)
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* @param src_cl_buf pointer to source OpenCL buffer
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* @param buf_size size in bytes of the source and destination buffers
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_buffer_read(uint8_t *dst_buf, cl_mem src_cl_buf, size_t buf_size);
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/**
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* Write image data from memory to OpenCL buffer.
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*
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* The source must be an array of pointers to image plane buffers.
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*
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* @param dst_cl_buf pointer to destination OpenCL buffer
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* @param dst_cl_buf_size size in bytes of OpenCL buffer
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* @param dst_cl_buf_offset the offset of the OpenCL buffer start position
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* @param src_data array of pointers to source plane buffers
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* @param src_plane_sizes array of sizes in bytes of the source plane buffers
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* @param src_plane_num number of source image planes
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_buffer_write_image(cl_mem dst_cl_buf, size_t cl_buffer_size, int dst_cl_offset,
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uint8_t **src_data, int *plane_size, int plane_num);
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/**
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* Read image data from OpenCL buffer.
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*
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* @param dst_data array of pointers to destination plane buffers
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* @param dst_plane_sizes array of pointers to destination plane buffers
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* @param dst_plane_num number of destination image planes
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* @param src_cl_buf pointer to source OpenCL buffer
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* @param src_cl_buf_size size in bytes of OpenCL buffer
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* @return >=0 on success, a negative error code in case of failure
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*/
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int av_opencl_buffer_read_image(uint8_t **dst_data, int *plane_size, int plane_num,
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cl_mem src_cl_buf, size_t cl_buffer_size);
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/**
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* Release OpenCL buffer.
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*
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* @param cl_buf pointer to OpenCL buffer to release, which was
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* previously filled with av_opencl_buffer_create()
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*/
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void av_opencl_buffer_release(cl_mem *cl_buf);
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/**
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* Release kernel object.
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*
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* @param env kernel environment where the kernel object was created
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* with av_opencl_create_kernel()
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*/
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void av_opencl_release_kernel(AVOpenCLKernelEnv *env);
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/**
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* Release OpenCL environment.
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*
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* The OpenCL environment is effectively released only if all the created
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* kernels had been released with av_opencl_release_kernel().
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*/
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void av_opencl_uninit(void);
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#endif /* LIBAVUTIL_OPENCL_H */
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