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Diffstat (limited to 'libavutil/opencl.h')
| -rw-r--r-- | libavutil/opencl.h | 298 |
1 files changed, 298 insertions, 0 deletions
diff --git a/libavutil/opencl.h b/libavutil/opencl.h new file mode 100644 index 0000000000..4655cba552 --- /dev/null +++ b/libavutil/opencl.h @@ -0,0 +1,298 @@ +/* + * Copyright (C) 2012 Peng Gao <peng@multicorewareinc.com> + * Copyright (C) 2012 Li Cao <li@multicorewareinc.com> + * Copyright (C) 2012 Wei Gao <weigao@multicorewareinc.com> + * Copyright (C) 2013 Lenny Wang <lwanghpc@gmail.com> + * + * 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 + */ + +/** + * @file + * OpenCL wrapper + * + * This interface is considered still experimental and its API and ABI may + * change without prior notice. + */ + +#ifndef LIBAVUTIL_OPENCL_H +#define LIBAVUTIL_OPENCL_H + +#include "config.h" +#if HAVE_CL_CL_H +#include <CL/cl.h> +#else +#include <OpenCL/cl.h> +#endif +#include <stdint.h> +#include "dict.h" + +#include "libavutil/version.h" + +#define AV_OPENCL_KERNEL( ... )# __VA_ARGS__ + +#define AV_OPENCL_MAX_KERNEL_NAME_SIZE 150 + +#define AV_OPENCL_MAX_DEVICE_NAME_SIZE 100 + +#define AV_OPENCL_MAX_PLATFORM_NAME_SIZE 100 + +typedef struct { + int device_type; + char device_name[AV_OPENCL_MAX_DEVICE_NAME_SIZE]; + cl_device_id device_id; +} AVOpenCLDeviceNode; + +typedef struct { + cl_platform_id platform_id; + char platform_name[AV_OPENCL_MAX_PLATFORM_NAME_SIZE]; + int device_num; + AVOpenCLDeviceNode **device_node; +} AVOpenCLPlatformNode; + +typedef struct { + int platform_num; + AVOpenCLPlatformNode **platform_node; +} AVOpenCLDeviceList; + +typedef struct { + cl_platform_id platform_id; + cl_device_type device_type; + cl_context context; + cl_device_id device_id; + cl_command_queue command_queue; + char *platform_name; +} AVOpenCLExternalEnv; + +/** + * Get OpenCL device list. + * + * It must be freed with av_opencl_free_device_list(). + * + * @param device_list pointer to OpenCL environment device list, + * should be released by av_opencl_free_device_list() + * + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_get_device_list(AVOpenCLDeviceList **device_list); + +/** + * Free OpenCL device list. + * + * @param device_list pointer to OpenCL environment device list + * created by av_opencl_get_device_list() + */ +void av_opencl_free_device_list(AVOpenCLDeviceList **device_list); + +/** + * Set option in the global OpenCL context. + * + * This options affect the operation performed by the next + * av_opencl_init() operation. + * + * The currently accepted options are: + * - platform: set index of platform in device list + * - device: set index of device in device list + * + * See reference "OpenCL Specification Version: 1.2 chapter 5.6.4". + * + * @param key option key + * @param val option value + * @return >=0 on success, a negative error code in case of failure + * @see av_opencl_get_option() + */ +int av_opencl_set_option(const char *key, const char *val); + +/** + * Get option value from the global OpenCL context. + * + * @param key option key + * @param out_val pointer to location where option value will be + * written, must be freed with av_freep() + * @return >=0 on success, a negative error code in case of failure + * @see av_opencl_set_option() + */ +int av_opencl_get_option(const char *key, uint8_t **out_val); + +/** + * Free option values of the global OpenCL context. + * + */ +void av_opencl_free_option(void); + +/** + * Allocate OpenCL external environment. + * + * It must be freed with av_opencl_free_external_env(). + * + * @return pointer to allocated OpenCL external environment + */ +AVOpenCLExternalEnv *av_opencl_alloc_external_env(void); + +/** + * Free OpenCL external environment. + * + * @param ext_opencl_env pointer to OpenCL external environment + * created by av_opencl_alloc_external_env() + */ +void av_opencl_free_external_env(AVOpenCLExternalEnv **ext_opencl_env); + +/** + * Get OpenCL error string. + * + * @param status OpenCL error code + * @return OpenCL error string + */ +const char *av_opencl_errstr(cl_int status); + +/** + * Register kernel code. + * + * The registered kernel code is stored in a global context, and compiled + * in the runtime environment when av_opencl_init() is called. + * + * @param kernel_code kernel code to be compiled in the OpenCL runtime environment + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_register_kernel_code(const char *kernel_code); + +/** + * Initialize the run time OpenCL environment + * + * @param ext_opencl_env external OpenCL environment, created by an + * application program, ignored if set to NULL + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_init(AVOpenCLExternalEnv *ext_opencl_env); + +/** + * compile specific OpenCL kernel source + * + * @param program_name pointer to a program name used for identification + * @param build_opts pointer to a string that describes the preprocessor + * build options to be used for building the program + * @return a cl_program object + */ +cl_program av_opencl_compile(const char *program_name, const char* build_opts); + +/** + * get OpenCL command queue + * + * @return a cl_command_queue object + */ +cl_command_queue av_opencl_get_command_queue(void); + +/** + * Create OpenCL buffer. + * + * The buffer is used to save the data used or created by an OpenCL + * kernel. + * The created buffer must be released with av_opencl_buffer_release(). + * + * See clCreateBuffer() function reference for more information about + * the parameters. + * + * @param cl_buf pointer to OpenCL buffer + * @param cl_buf_size size in bytes of the OpenCL buffer to create + * @param flags flags used to control buffer attributes + * @param host_ptr host pointer of the OpenCL buffer + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_buffer_create(cl_mem *cl_buf, size_t cl_buf_size, int flags, void *host_ptr); + +/** + * Write OpenCL buffer with data from src_buf. + * + * @param dst_cl_buf pointer to OpenCL destination buffer + * @param src_buf pointer to source buffer + * @param buf_size size in bytes of the source and destination buffers + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_buffer_write(cl_mem dst_cl_buf, uint8_t *src_buf, size_t buf_size); + +/** + * Read data from OpenCL buffer to memory buffer. + * + * @param dst_buf pointer to destination buffer (CPU memory) + * @param src_cl_buf pointer to source OpenCL buffer + * @param buf_size size in bytes of the source and destination buffers + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_buffer_read(uint8_t *dst_buf, cl_mem src_cl_buf, size_t buf_size); + +/** + * Write image data from memory to OpenCL buffer. + * + * The source must be an array of pointers to image plane buffers. + * + * @param dst_cl_buf pointer to destination OpenCL buffer + * @param dst_cl_buf_size size in bytes of OpenCL buffer + * @param dst_cl_buf_offset the offset of the OpenCL buffer start position + * @param src_data array of pointers to source plane buffers + * @param src_plane_sizes array of sizes in bytes of the source plane buffers + * @param src_plane_num number of source image planes + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_buffer_write_image(cl_mem dst_cl_buf, size_t cl_buffer_size, int dst_cl_offset, + uint8_t **src_data, int *plane_size, int plane_num); + +/** + * Read image data from OpenCL buffer. + * + * @param dst_data array of pointers to destination plane buffers + * @param dst_plane_sizes array of pointers to destination plane buffers + * @param dst_plane_num number of destination image planes + * @param src_cl_buf pointer to source OpenCL buffer + * @param src_cl_buf_size size in bytes of OpenCL buffer + * @return >=0 on success, a negative error code in case of failure + */ +int av_opencl_buffer_read_image(uint8_t **dst_data, int *plane_size, int plane_num, + cl_mem src_cl_buf, size_t cl_buffer_size); + +/** + * Release OpenCL buffer. + * + * @param cl_buf pointer to OpenCL buffer to release, which was + * previously filled with av_opencl_buffer_create() + */ +void av_opencl_buffer_release(cl_mem *cl_buf); + +/** + * Release OpenCL environment. + * + * The OpenCL environment is effectively released only if all the created + * kernels had been released with av_opencl_release_kernel(). + */ +void av_opencl_uninit(void); + +/** + * Benchmark an OpenCL device with a user defined callback function. This function + * sets up an external OpenCL environment including context and command queue on + * the device then tears it down in the end. The callback function should perform + * the rest of the work. + * + * @param device pointer to the OpenCL device to be used + * @param platform cl_platform_id handle to which the device belongs to + * @param benchmark callback function to perform the benchmark, return a + * negative value in case of failure + * @return the score passed from the callback function, a negative error code in case + * of failure + */ +int64_t av_opencl_benchmark(AVOpenCLDeviceNode *device, cl_platform_id platform, + int64_t (*benchmark)(AVOpenCLExternalEnv *ext_opencl_env)); + +#endif /* LIBAVUTIL_OPENCL_H */ |