2 * Copyright (C) 2012 Peng Gao <peng@multicorewareinc.com>
3 * Copyright (C) 2012 Li Cao <li@multicorewareinc.com>
4 * Copyright (C) 2012 Wei Gao <weigao@multicorewareinc.com>
5 * Copyright (C) 2013 Lenny Wang <lwanghpc@gmail.com>
7 * This file is part of FFmpeg.
9 * FFmpeg is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Lesser General Public
11 * License as published by the Free Software Foundation; either
12 * version 2.1 of the License, or (at your option) any later version.
14 * FFmpeg is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Lesser General Public License for more details.
19 * You should have received a copy of the GNU Lesser General Public
20 * License along with FFmpeg; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
28 * This interface is considered still experimental and its API and ABI may
29 * change without prior notice.
32 #ifndef LIBAVUTIL_OPENCL_H
33 #define LIBAVUTIL_OPENCL_H
39 #include <OpenCL/cl.h>
44 #include "libavutil/version.h"
46 #define AV_OPENCL_KERNEL( ... )# __VA_ARGS__
48 #define AV_OPENCL_MAX_KERNEL_NAME_SIZE 150
50 #define AV_OPENCL_MAX_DEVICE_NAME_SIZE 100
52 #define AV_OPENCL_MAX_PLATFORM_NAME_SIZE 100
56 char device_name[AV_OPENCL_MAX_DEVICE_NAME_SIZE];
57 cl_device_id device_id;
61 cl_platform_id platform_id;
62 char platform_name[AV_OPENCL_MAX_PLATFORM_NAME_SIZE];
64 AVOpenCLDeviceNode **device_node;
65 } AVOpenCLPlatformNode;
69 AVOpenCLPlatformNode **platform_node;
74 cl_command_queue command_queue;
76 char kernel_name[AV_OPENCL_MAX_KERNEL_NAME_SIZE];
81 cl_platform_id platform_id;
82 cl_device_type device_type;
84 cl_device_id device_id;
85 cl_command_queue command_queue;
87 } AVOpenCLExternalEnv;
90 * Get OpenCL device list.
92 * It must be freed with av_opencl_free_device_list().
94 * @param device_list pointer to OpenCL environment device list,
95 * should be released by av_opencl_free_device_list()
97 * @return >=0 on success, a negative error code in case of failure
99 int av_opencl_get_device_list(AVOpenCLDeviceList **device_list);
102 * Free OpenCL device list.
104 * @param device_list pointer to OpenCL environment device list
105 * created by av_opencl_get_device_list()
107 void av_opencl_free_device_list(AVOpenCLDeviceList **device_list);
110 * Set option in the global OpenCL context.
112 * This options affect the operation performed by the next
113 * av_opencl_init() operation.
115 * The currently accepted options are:
116 * - platform: set index of platform in device list
117 * - device: set index of device in device list
119 * See reference "OpenCL Specification Version: 1.2 chapter 5.6.4".
121 * @param key option key
122 * @param val option value
123 * @return >=0 on success, a negative error code in case of failure
124 * @see av_opencl_get_option()
126 int av_opencl_set_option(const char *key, const char *val);
129 * Get option value from the global OpenCL context.
131 * @param key option key
132 * @param out_val pointer to location where option value will be
133 * written, must be freed with av_freep()
134 * @return >=0 on success, a negative error code in case of failure
135 * @see av_opencl_set_option()
137 int av_opencl_get_option(const char *key, uint8_t **out_val);
140 * Free option values of the global OpenCL context.
143 void av_opencl_free_option(void);
146 * Allocate OpenCL external environment.
148 * It must be freed with av_opencl_free_external_env().
150 * @return pointer to allocated OpenCL external environment
152 AVOpenCLExternalEnv *av_opencl_alloc_external_env(void);
155 * Free OpenCL external environment.
157 * @param ext_opencl_env pointer to OpenCL external environment
158 * created by av_opencl_alloc_external_env()
160 void av_opencl_free_external_env(AVOpenCLExternalEnv **ext_opencl_env);
163 * Get OpenCL error string.
165 * @param status OpenCL error code
166 * @return OpenCL error string
168 const char *av_opencl_errstr(cl_int status);
171 * Register kernel code.
173 * The registered kernel code is stored in a global context, and compiled
174 * in the runtime environment when av_opencl_init() is called.
176 * @param kernel_code kernel code to be compiled in the OpenCL runtime environment
177 * @return >=0 on success, a negative error code in case of failure
179 int av_opencl_register_kernel_code(const char *kernel_code);
182 * Initialize the run time OpenCL environment
184 * @param ext_opencl_env external OpenCL environment, created by an
185 * application program, ignored if set to NULL
186 * @return >=0 on success, a negative error code in case of failure
188 int av_opencl_init(AVOpenCLExternalEnv *ext_opencl_env);
190 #if FF_API_OLD_OPENCL
192 * Create kernel object in the specified kernel environment.
194 * @param env pointer to kernel environment which is filled with
195 * the environment used to run the kernel
196 * @param kernel_name kernel function name
197 * @return >=0 on success, a negative error code in case of failure
198 * @deprecated, use clCreateKernel
200 int av_opencl_create_kernel(AVOpenCLKernelEnv *env, const char *kernel_name);
204 * compile specific OpenCL kernel source
206 * @param program_name pointer to a program name used for identification
207 * @param build_opts pointer to a string that describes the preprocessor
208 * build options to be used for building the program
209 * @return a cl_program object
211 cl_program av_opencl_compile(const char *program_name, const char* build_opts);
214 * get OpenCL command queue
216 * @return a cl_command_queue object
218 cl_command_queue av_opencl_get_command_queue(void);
221 * Create OpenCL buffer.
223 * The buffer is used to save the data used or created by an OpenCL
225 * The created buffer must be released with av_opencl_buffer_release().
227 * See clCreateBuffer() function reference for more information about
230 * @param cl_buf pointer to OpenCL buffer
231 * @param cl_buf_size size in bytes of the OpenCL buffer to create
232 * @param flags flags used to control buffer attributes
233 * @param host_ptr host pointer of the OpenCL buffer
234 * @return >=0 on success, a negative error code in case of failure
236 int av_opencl_buffer_create(cl_mem *cl_buf, size_t cl_buf_size, int flags, void *host_ptr);
239 * Write OpenCL buffer with data from src_buf.
241 * @param dst_cl_buf pointer to OpenCL destination buffer
242 * @param src_buf pointer to source buffer
243 * @param buf_size size in bytes of the source and destination buffers
244 * @return >=0 on success, a negative error code in case of failure
246 int av_opencl_buffer_write(cl_mem dst_cl_buf, uint8_t *src_buf, size_t buf_size);
249 * Read data from OpenCL buffer to memory buffer.
251 * @param dst_buf pointer to destination buffer (CPU memory)
252 * @param src_cl_buf pointer to source OpenCL buffer
253 * @param buf_size size in bytes of the source and destination buffers
254 * @return >=0 on success, a negative error code in case of failure
256 int av_opencl_buffer_read(uint8_t *dst_buf, cl_mem src_cl_buf, size_t buf_size);
259 * Write image data from memory to OpenCL buffer.
261 * The source must be an array of pointers to image plane buffers.
263 * @param dst_cl_buf pointer to destination OpenCL buffer
264 * @param dst_cl_buf_size size in bytes of OpenCL buffer
265 * @param dst_cl_buf_offset the offset of the OpenCL buffer start position
266 * @param src_data array of pointers to source plane buffers
267 * @param src_plane_sizes array of sizes in bytes of the source plane buffers
268 * @param src_plane_num number of source image planes
269 * @return >=0 on success, a negative error code in case of failure
271 int av_opencl_buffer_write_image(cl_mem dst_cl_buf, size_t cl_buffer_size, int dst_cl_offset,
272 uint8_t **src_data, int *plane_size, int plane_num);
275 * Read image data from OpenCL buffer.
277 * @param dst_data array of pointers to destination plane buffers
278 * @param dst_plane_sizes array of pointers to destination plane buffers
279 * @param dst_plane_num number of destination image planes
280 * @param src_cl_buf pointer to source OpenCL buffer
281 * @param src_cl_buf_size size in bytes of OpenCL buffer
282 * @return >=0 on success, a negative error code in case of failure
284 int av_opencl_buffer_read_image(uint8_t **dst_data, int *plane_size, int plane_num,
285 cl_mem src_cl_buf, size_t cl_buffer_size);
288 * Release OpenCL buffer.
290 * @param cl_buf pointer to OpenCL buffer to release, which was
291 * previously filled with av_opencl_buffer_create()
293 void av_opencl_buffer_release(cl_mem *cl_buf);
295 #if FF_API_OLD_OPENCL
297 * Release kernel object.
299 * @param env kernel environment where the kernel object was created
300 * with av_opencl_create_kernel()
301 * @deprecated, use clReleaseKernel
303 void av_opencl_release_kernel(AVOpenCLKernelEnv *env);
307 * Release OpenCL environment.
309 * The OpenCL environment is effectively released only if all the created
310 * kernels had been released with av_opencl_release_kernel().
312 void av_opencl_uninit(void);
315 * Benchmark an OpenCL device with a user defined callback function. This function
316 * sets up an external OpenCL environment including context and command queue on
317 * the device then tears it down in the end. The callback function should perform
318 * the rest of the work.
320 * @param device pointer to the OpenCL device to be used
321 * @param platform cl_platform_id handle to which the device belongs to
322 * @param benchmark callback function to perform the benchmark, return a
323 * negative value in case of failure
324 * @return the score passed from the callback function, a negative error code in case
327 int64_t av_opencl_benchmark(AVOpenCLDeviceNode *device, cl_platform_id platform,
328 int64_t (*benchmark)(AVOpenCLExternalEnv *ext_opencl_env));
330 #endif /* LIBAVUTIL_OPENCL_H */