1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
|
/*
* 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/bprint.h"
#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;
// Groups together information about a kernel argument
typedef struct OpenCLKernelArg {
size_t arg_size;
const void *arg_val;
} OpenCLKernelArg;
/**
* 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; \
}
/**
* A helper macro to handle OpenCL errors. It will assign errcode to
* variable err, log error msg, and jump to fail label on error.
*/
#define CL_FAIL_ON_ERROR(errcode, ...) do { \
if (cle != CL_SUCCESS) { \
av_log(avctx, AV_LOG_ERROR, __VA_ARGS__); \
err = errcode; \
goto fail; \
} \
} while(0)
/**
* Create a kernel with the given name.
*
* The kernel variable in the context structure must have a name of the form
* kernel_<kernel_name>.
*
* The OpenCLFilterContext variable in the context structure must be named ocf.
*
* Requires the presence of a local cl_int variable named cle and a fail label for error
* handling.
*/
#define CL_CREATE_KERNEL(ctx, kernel_name) do { \
ctx->kernel_ ## kernel_name = clCreateKernel(ctx->ocf.program, #kernel_name, &cle); \
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create %s kernel: %d.\n", #kernel_name, cle); \
} while(0)
/**
* release an OpenCL Kernel
*/
#define CL_RELEASE_KERNEL(k) \
do { \
if (k) { \
cle = clReleaseKernel(k); \
if (cle != CL_SUCCESS) \
av_log(avctx, AV_LOG_ERROR, "Failed to release " \
"OpenCL kernel: %d.\n", cle); \
} \
} while(0)
/**
* release an OpenCL Memory Object
*/
#define CL_RELEASE_MEMORY(m) \
do { \
if (m) { \
cle = clReleaseMemObject(m); \
if (cle != CL_SUCCESS) \
av_log(avctx, AV_LOG_ERROR, "Failed to release " \
"OpenCL memory: %d.\n", cle); \
} \
} while(0)
/**
* release an OpenCL Command Queue
*/
#define CL_RELEASE_QUEUE(q) \
do { \
if (q) { \
cle = clReleaseCommandQueue(q); \
if (cle != CL_SUCCESS) \
av_log(avctx, AV_LOG_ERROR, "Failed to release " \
"OpenCL command queue: %d.\n", cle); \
} \
} while(0)
/**
* Enqueue a kernel with the given information.
*
* Kernel arguments are provided as KernelArg structures and are set in the order
* that they are passed.
*
* Requires the presence of a local cl_int variable named cle and a fail label for error
* handling.
*/
#define CL_ENQUEUE_KERNEL_WITH_ARGS(queue, kernel, global_work_size, local_work_size, event, ...) \
do { \
OpenCLKernelArg args[] = {__VA_ARGS__}; \
for (int i = 0; i < FF_ARRAY_ELEMS(args); i++) { \
cle = clSetKernelArg(kernel, i, args[i].arg_size, args[i].arg_val); \
if (cle != CL_SUCCESS) { \
av_log(avctx, AV_LOG_ERROR, "Failed to set kernel " \
"argument %d: error %d.\n", i, cle); \
err = AVERROR(EIO); \
goto fail; \
} \
} \
\
cle = clEnqueueNDRangeKernel( \
queue, \
kernel, \
FF_ARRAY_ELEMS(global_work_size), \
NULL, \
global_work_size, \
local_work_size, \
0, \
NULL, \
event \
); \
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue kernel: %d.\n", cle); \
} while (0)
/**
* Uses the above macro to enqueue the given kernel and then additionally runs it to
* completion via clFinish.
*
* Requires the presence of a local cl_int variable named cle and a fail label for error
* handling.
*/
#define CL_RUN_KERNEL_WITH_ARGS(queue, kernel, global_work_size, local_work_size, event, ...) do { \
CL_ENQUEUE_KERNEL_WITH_ARGS( \
queue, kernel, global_work_size, local_work_size, event, __VA_ARGS__ \
); \
\
cle = clFinish(queue); \
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle); \
} while (0)
/**
* Create a buffer with the given information.
*
* The buffer variable in the context structure must be named <buffer_name>.
*
* Requires the presence of a local cl_int variable named cle and a fail label for error
* handling.
*/
#define CL_CREATE_BUFFER_FLAGS(ctx, buffer_name, flags, size, host_ptr) do { \
ctx->buffer_name = clCreateBuffer( \
ctx->ocf.hwctx->context, \
flags, \
size, \
host_ptr, \
&cle \
); \
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create buffer %s: %d.\n", #buffer_name, cle); \
} while(0)
/**
* Perform a blocking write to a buffer.
*
* Requires the presence of a local cl_int variable named cle and a fail label for error
* handling.
*/
#define CL_BLOCKING_WRITE_BUFFER(queue, buffer, size, host_ptr, event) do { \
cle = clEnqueueWriteBuffer( \
queue, \
buffer, \
CL_TRUE, \
0, \
size, \
host_ptr, \
0, \
NULL, \
event \
); \
CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to write buffer to device: %d.\n", cle); \
} while(0)
/**
* Create a buffer with the given information.
*
* The buffer variable in the context structure must be named <buffer_name>.
*
* Requires the presence of a local cl_int variable named cle and a fail label for error
* handling.
*/
#define CL_CREATE_BUFFER(ctx, buffer_name, size) CL_CREATE_BUFFER_FLAGS(ctx, buffer_name, 0, size, NULL)
/**
* 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);
/**
* Print a 3x3 matrix into a buffer as __constant array, which could
* be included in an OpenCL program.
*/
void ff_opencl_print_const_matrix_3x3(AVBPrint *buf, const char *name_str,
double mat[3][3]);
/**
* Gets the command start and end times for the given event and returns the
* difference (the time that the event took).
*/
cl_ulong ff_opencl_get_event_time(cl_event event);
#endif /* AVFILTER_OPENCL_H */
|
