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opencl.c
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1 /*
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>
6  *
7  * This file is part of FFmpeg.
8  *
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.
13  *
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.
18  *
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
22  */
23 
24 #include "opencl.h"
25 #include "avstring.h"
26 #include "log.h"
27 #include "avassert.h"
28 #include "opt.h"
29 
30 #if HAVE_THREADS
31 #if HAVE_PTHREADS
32 #include <pthread.h>
33 #elif HAVE_W32THREADS
34 #include "compat/w32pthreads.h"
35 #elif HAVE_OS2THREADS
36 #include "compat/os2threads.h"
37 #endif
38 #include "atomic.h"
39 
40 static volatile pthread_mutex_t *atomic_opencl_lock = NULL;
41 #define LOCK_OPENCL pthread_mutex_lock(atomic_opencl_lock)
42 #define UNLOCK_OPENCL pthread_mutex_unlock(atomic_opencl_lock)
43 #else
44 #define LOCK_OPENCL
45 #define UNLOCK_OPENCL
46 #endif
47 
48 #define MAX_KERNEL_CODE_NUM 200
49 
50 typedef struct {
51  int is_compiled;
52  const char *kernel_string;
53 } KernelCode;
54 
55 typedef struct {
56  const AVClass *class;
57  int log_offset;
58  void *log_ctx;
59  int init_count;
60  int opt_init_flag;
61  /**
62  * if set to 1, the OpenCL environment was created by the user and
63  * passed as AVOpenCLExternalEnv when initing ,0:created by opencl wrapper.
64  */
65  int is_user_created;
66  int platform_idx;
67  int device_idx;
68  cl_platform_id platform_id;
69  cl_device_type device_type;
70  cl_context context;
71  cl_device_id device_id;
72  cl_command_queue command_queue;
73  int kernel_code_count;
74  KernelCode kernel_code[MAX_KERNEL_CODE_NUM];
75  AVOpenCLDeviceList device_list;
76 } OpenclContext;
77 
78 #define OFFSET(x) offsetof(OpenclContext, x)
79 
80 static const AVOption opencl_options[] = {
81  { "platform_idx", "set platform index value", OFFSET(platform_idx), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX},
82  { "device_idx", "set device index value", OFFSET(device_idx), AV_OPT_TYPE_INT, {.i64=-1}, -1, INT_MAX},
83  { NULL }
84 };
85 
86 static const AVClass openclutils_class = {
87  .class_name = "OPENCLUTILS",
88  .option = opencl_options,
89  .item_name = av_default_item_name,
90  .version = LIBAVUTIL_VERSION_INT,
91  .log_level_offset_offset = offsetof(OpenclContext, log_offset),
92  .parent_log_context_offset = offsetof(OpenclContext, log_ctx),
93 };
94 
95 static OpenclContext opencl_ctx = {&openclutils_class};
96 
97 static const cl_device_type device_type[] = {CL_DEVICE_TYPE_GPU, CL_DEVICE_TYPE_CPU};
98 
99 typedef struct {
100  int err_code;
101  const char *err_str;
102 } OpenclErrorMsg;
103 
104 static const OpenclErrorMsg opencl_err_msg[] = {
105  {CL_DEVICE_NOT_FOUND, "DEVICE NOT FOUND"},
106  {CL_DEVICE_NOT_AVAILABLE, "DEVICE NOT AVAILABLE"},
107  {CL_COMPILER_NOT_AVAILABLE, "COMPILER NOT AVAILABLE"},
108  {CL_MEM_OBJECT_ALLOCATION_FAILURE, "MEM OBJECT ALLOCATION FAILURE"},
109  {CL_OUT_OF_RESOURCES, "OUT OF RESOURCES"},
110  {CL_OUT_OF_HOST_MEMORY, "OUT OF HOST MEMORY"},
111  {CL_PROFILING_INFO_NOT_AVAILABLE, "PROFILING INFO NOT AVAILABLE"},
112  {CL_MEM_COPY_OVERLAP, "MEM COPY OVERLAP"},
113  {CL_IMAGE_FORMAT_MISMATCH, "IMAGE FORMAT MISMATCH"},
114  {CL_IMAGE_FORMAT_NOT_SUPPORTED, "IMAGE FORMAT NOT_SUPPORTED"},
115  {CL_BUILD_PROGRAM_FAILURE, "BUILD PROGRAM FAILURE"},
116  {CL_MAP_FAILURE, "MAP FAILURE"},
117  {CL_MISALIGNED_SUB_BUFFER_OFFSET, "MISALIGNED SUB BUFFER OFFSET"},
118  {CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST, "EXEC STATUS ERROR FOR EVENTS IN WAIT LIST"},
119  {CL_COMPILE_PROGRAM_FAILURE, "COMPILE PROGRAM FAILURE"},
120  {CL_LINKER_NOT_AVAILABLE, "LINKER NOT AVAILABLE"},
121  {CL_LINK_PROGRAM_FAILURE, "LINK PROGRAM FAILURE"},
122  {CL_DEVICE_PARTITION_FAILED, "DEVICE PARTITION FAILED"},
123  {CL_KERNEL_ARG_INFO_NOT_AVAILABLE, "KERNEL ARG INFO NOT AVAILABLE"},
124  {CL_INVALID_VALUE, "INVALID VALUE"},
125  {CL_INVALID_DEVICE_TYPE, "INVALID DEVICE TYPE"},
126  {CL_INVALID_PLATFORM, "INVALID PLATFORM"},
127  {CL_INVALID_DEVICE, "INVALID DEVICE"},
128  {CL_INVALID_CONTEXT, "INVALID CONTEXT"},
129  {CL_INVALID_QUEUE_PROPERTIES, "INVALID QUEUE PROPERTIES"},
130  {CL_INVALID_COMMAND_QUEUE, "INVALID COMMAND QUEUE"},
131  {CL_INVALID_HOST_PTR, "INVALID HOST PTR"},
132  {CL_INVALID_MEM_OBJECT, "INVALID MEM OBJECT"},
133  {CL_INVALID_IMAGE_FORMAT_DESCRIPTOR, "INVALID IMAGE FORMAT DESCRIPTOR"},
134  {CL_INVALID_IMAGE_SIZE, "INVALID IMAGE SIZE"},
135  {CL_INVALID_SAMPLER, "INVALID SAMPLER"},
136  {CL_INVALID_BINARY, "INVALID BINARY"},
137  {CL_INVALID_BUILD_OPTIONS, "INVALID BUILD OPTIONS"},
138  {CL_INVALID_PROGRAM, "INVALID PROGRAM"},
139  {CL_INVALID_PROGRAM_EXECUTABLE, "INVALID PROGRAM EXECUTABLE"},
140  {CL_INVALID_KERNEL_NAME, "INVALID KERNEL NAME"},
141  {CL_INVALID_KERNEL_DEFINITION, "INVALID KERNEL DEFINITION"},
142  {CL_INVALID_KERNEL, "INVALID KERNEL"},
143  {CL_INVALID_ARG_INDEX, "INVALID ARG INDEX"},
144  {CL_INVALID_ARG_VALUE, "INVALID ARG VALUE"},
145  {CL_INVALID_ARG_SIZE, "INVALID ARG_SIZE"},
146  {CL_INVALID_KERNEL_ARGS, "INVALID KERNEL ARGS"},
147  {CL_INVALID_WORK_DIMENSION, "INVALID WORK DIMENSION"},
148  {CL_INVALID_WORK_GROUP_SIZE, "INVALID WORK GROUP SIZE"},
149  {CL_INVALID_WORK_ITEM_SIZE, "INVALID WORK ITEM SIZE"},
150  {CL_INVALID_GLOBAL_OFFSET, "INVALID GLOBAL OFFSET"},
151  {CL_INVALID_EVENT_WAIT_LIST, "INVALID EVENT WAIT LIST"},
152  {CL_INVALID_EVENT, "INVALID EVENT"},
153  {CL_INVALID_OPERATION, "INVALID OPERATION"},
154  {CL_INVALID_GL_OBJECT, "INVALID GL OBJECT"},
155  {CL_INVALID_BUFFER_SIZE, "INVALID BUFFER SIZE"},
156  {CL_INVALID_MIP_LEVEL, "INVALID MIP LEVEL"},
157  {CL_INVALID_GLOBAL_WORK_SIZE, "INVALID GLOBAL WORK SIZE"},
158  {CL_INVALID_PROPERTY, "INVALID PROPERTY"},
159  {CL_INVALID_IMAGE_DESCRIPTOR, "INVALID IMAGE DESCRIPTOR"},
160  {CL_INVALID_COMPILER_OPTIONS, "INVALID COMPILER OPTIONS"},
161  {CL_INVALID_LINKER_OPTIONS, "INVALID LINKER OPTIONS"},
162  {CL_INVALID_DEVICE_PARTITION_COUNT, "INVALID DEVICE PARTITION COUNT"},
163 };
164 
165 const char *av_opencl_errstr(cl_int status)
166 {
167  int i;
168  for (i = 0; i < FF_ARRAY_ELEMS(opencl_err_msg); i++) {
169  if (opencl_err_msg[i].err_code == status)
170  return opencl_err_msg[i].err_str;
171  }
172  return "unknown error";
173 }
174 
175 static void free_device_list(AVOpenCLDeviceList *device_list)
176 {
177  int i, j;
178  if (!device_list)
179  return;
180  for (i = 0; i < device_list->platform_num; i++) {
181  if (!device_list->platform_node[i])
182  continue;
183  for (j = 0; j < device_list->platform_node[i]->device_num; j++) {
184  av_freep(&(device_list->platform_node[i]->device_node[j]));
185  }
186  av_freep(&device_list->platform_node[i]->device_node);
187  av_freep(&device_list->platform_node[i]);
188  }
189  av_freep(&device_list->platform_node);
190  device_list->platform_num = 0;
191 }
192 
193 static int get_device_list(AVOpenCLDeviceList *device_list)
194 {
195  cl_int status;
196  int i, j, k, device_num, total_devices_num, ret = 0;
197  int *devices_num;
198  cl_platform_id *platform_ids = NULL;
199  cl_device_id *device_ids = NULL;
200  AVOpenCLDeviceNode *device_node = NULL;
201  status = clGetPlatformIDs(0, NULL, &device_list->platform_num);
202  if (status != CL_SUCCESS) {
203  av_log(&opencl_ctx, AV_LOG_ERROR,
204  "Could not get OpenCL platform ids: %s\n", av_opencl_errstr(status));
205  return AVERROR_EXTERNAL;
206  }
207  platform_ids = av_mallocz_array(device_list->platform_num, sizeof(cl_platform_id));
208  if (!platform_ids)
209  return AVERROR(ENOMEM);
210  status = clGetPlatformIDs(device_list->platform_num, platform_ids, NULL);
211  if (status != CL_SUCCESS) {
212  av_log(&opencl_ctx, AV_LOG_ERROR,
213  "Could not get OpenCL platform ids: %s\n", av_opencl_errstr(status));
214  ret = AVERROR_EXTERNAL;
215  goto end;
216  }
217  device_list->platform_node = av_mallocz_array(device_list->platform_num, sizeof(AVOpenCLPlatformNode *));
218  if (!device_list->platform_node) {
219  ret = AVERROR(ENOMEM);
220  goto end;
221  }
222  devices_num = av_mallocz(sizeof(int) * FF_ARRAY_ELEMS(device_type));
223  if (!devices_num) {
224  ret = AVERROR(ENOMEM);
225  goto end;
226  }
227  for (i = 0; i < device_list->platform_num; i++) {
228  device_list->platform_node[i] = av_mallocz(sizeof(AVOpenCLPlatformNode));
229  if (!device_list->platform_node[i]) {
230  ret = AVERROR(ENOMEM);
231  goto end;
232  }
233  device_list->platform_node[i]->platform_id = platform_ids[i];
234  status = clGetPlatformInfo(platform_ids[i], CL_PLATFORM_VENDOR,
235  sizeof(device_list->platform_node[i]->platform_name),
236  device_list->platform_node[i]->platform_name, NULL);
237  total_devices_num = 0;
238  for (j = 0; j < FF_ARRAY_ELEMS(device_type); j++) {
239  status = clGetDeviceIDs(device_list->platform_node[i]->platform_id,
240  device_type[j], 0, NULL, &devices_num[j]);
241  total_devices_num += devices_num[j];
242  }
243  device_list->platform_node[i]->device_node = av_mallocz_array(total_devices_num, sizeof(AVOpenCLDeviceNode *));
244  if (!device_list->platform_node[i]->device_node) {
245  ret = AVERROR(ENOMEM);
246  goto end;
247  }
248  for (j = 0; j < FF_ARRAY_ELEMS(device_type); j++) {
249  if (devices_num[j]) {
250  device_ids = av_mallocz_array(devices_num[j], sizeof(cl_device_id));
251  if (!device_ids) {
252  ret = AVERROR(ENOMEM);
253  goto end;
254  }
255  status = clGetDeviceIDs(device_list->platform_node[i]->platform_id, device_type[j],
256  devices_num[j], device_ids, NULL);
257  if (status != CL_SUCCESS) {
258  av_log(&opencl_ctx, AV_LOG_WARNING,
259  "Could not get device ID: %s:\n", av_opencl_errstr(status));
260  av_freep(&device_ids);
261  continue;
262  }
263  for (k = 0; k < devices_num[j]; k++) {
264  device_num = device_list->platform_node[i]->device_num;
265  device_list->platform_node[i]->device_node[device_num] = av_mallocz(sizeof(AVOpenCLDeviceNode));
266  if (!device_list->platform_node[i]->device_node[device_num]) {
267  ret = AVERROR(ENOMEM);
268  goto end;
269  }
270  device_node = device_list->platform_node[i]->device_node[device_num];
271  device_node->device_id = device_ids[k];
272  device_node->device_type = device_type[j];
273  status = clGetDeviceInfo(device_node->device_id, CL_DEVICE_NAME,
274  sizeof(device_node->device_name), device_node->device_name,
275  NULL);
276  if (status != CL_SUCCESS) {
277  av_log(&opencl_ctx, AV_LOG_WARNING,
278  "Could not get device name: %s\n", av_opencl_errstr(status));
279  continue;
280  }
281  device_list->platform_node[i]->device_num++;
282  }
283  av_freep(&device_ids);
284  }
285  }
286  }
287 end:
288  av_freep(&platform_ids);
289  av_freep(&devices_num);
290  av_freep(&device_ids);
291  if (ret < 0)
292  free_device_list(device_list);
293  return ret;
294 }
295 
296 int av_opencl_get_device_list(AVOpenCLDeviceList **device_list)
297 {
298  int ret = 0;
299  *device_list = av_mallocz(sizeof(AVOpenCLDeviceList));
300  if (!(*device_list)) {
301  av_log(&opencl_ctx, AV_LOG_ERROR, "Could not allocate opencl device list\n");
302  return AVERROR(ENOMEM);
303  }
304  ret = get_device_list(*device_list);
305  if (ret < 0) {
306  av_log(&opencl_ctx, AV_LOG_ERROR, "Could not get device list from environment\n");
307  free_device_list(*device_list);
308  av_freep(device_list);
309  return ret;
310  }
311  return ret;
312 }
313 
314 void av_opencl_free_device_list(AVOpenCLDeviceList **device_list)
315 {
316  free_device_list(*device_list);
317  av_freep(device_list);
318 }
319 
320 static inline int init_opencl_mtx(void)
321 {
322 #if HAVE_THREADS
323  if (!atomic_opencl_lock) {
324  int err;
325  pthread_mutex_t *tmp = av_malloc(sizeof(pthread_mutex_t));
326  if (!tmp)
327  return AVERROR(ENOMEM);
328  if ((err = pthread_mutex_init(tmp, NULL))) {
329  av_free(tmp);
330  return AVERROR(err);
331  }
332  if (avpriv_atomic_ptr_cas(&atomic_opencl_lock, NULL, tmp)) {
333  pthread_mutex_destroy(tmp);
334  av_free(tmp);
335  }
336  }
337 #endif
338  return 0;
339 }
340 
341 int av_opencl_set_option(const char *key, const char *val)
342 {
343  int ret = init_opencl_mtx( );
344  if (ret < 0)
345  return ret;
346  LOCK_OPENCL;
347  if (!opencl_ctx.opt_init_flag) {
348  av_opt_set_defaults(&opencl_ctx);
349  opencl_ctx.opt_init_flag = 1;
350  }
351  ret = av_opt_set(&opencl_ctx, key, val, 0);
352  UNLOCK_OPENCL;
353  return ret;
354 }
355 
356 int av_opencl_get_option(const char *key, uint8_t **out_val)
357 {
358  int ret = 0;
359  LOCK_OPENCL;
360  ret = av_opt_get(&opencl_ctx, key, 0, out_val);
361  UNLOCK_OPENCL;
362  return ret;
363 }
364 
365 void av_opencl_free_option(void)
366 {
367  /*FIXME: free openclutils context*/
368  LOCK_OPENCL;
369  av_opt_free(&opencl_ctx);
370  UNLOCK_OPENCL;
371 }
372 
373 AVOpenCLExternalEnv *av_opencl_alloc_external_env(void)
374 {
375  AVOpenCLExternalEnv *ext = av_mallocz(sizeof(AVOpenCLExternalEnv));
376  if (!ext) {
377  av_log(&opencl_ctx, AV_LOG_ERROR,
378  "Could not malloc external opencl environment data space\n");
379  }
380  return ext;
381 }
382 
383 void av_opencl_free_external_env(AVOpenCLExternalEnv **ext_opencl_env)
384 {
385  av_freep(ext_opencl_env);
386 }
387 
388 int av_opencl_register_kernel_code(const char *kernel_code)
389 {
390  int i, ret = init_opencl_mtx( );
391  if (ret < 0)
392  return ret;
393  LOCK_OPENCL;
394  if (opencl_ctx.kernel_code_count >= MAX_KERNEL_CODE_NUM) {
395  av_log(&opencl_ctx, AV_LOG_ERROR,
396  "Could not register kernel code, maximum number of registered kernel code %d already reached\n",
397  MAX_KERNEL_CODE_NUM);
398  ret = AVERROR(EINVAL);
399  goto end;
400  }
401  for (i = 0; i < opencl_ctx.kernel_code_count; i++) {
402  if (opencl_ctx.kernel_code[i].kernel_string == kernel_code) {
403  av_log(&opencl_ctx, AV_LOG_WARNING, "Same kernel code has been registered\n");
404  goto end;
405  }
406  }
407  opencl_ctx.kernel_code[opencl_ctx.kernel_code_count].kernel_string = kernel_code;
408  opencl_ctx.kernel_code[opencl_ctx.kernel_code_count].is_compiled = 0;
409  opencl_ctx.kernel_code_count++;
410 end:
411  UNLOCK_OPENCL;
412  return ret;
413 }
414 
415 cl_program av_opencl_compile(const char *program_name, const char *build_opts)
416 {
417  int i;
418  cl_int status;
419  int kernel_code_idx = 0;
420  const char *kernel_source;
421  size_t kernel_code_len;
422  char* ptr = NULL;
423  cl_program program = NULL;
424 
425  LOCK_OPENCL;
426  for (i = 0; i < opencl_ctx.kernel_code_count; i++) {
427  // identify a program using a unique name within the kernel source
428  ptr = av_stristr(opencl_ctx.kernel_code[i].kernel_string, program_name);
429  if (ptr && !opencl_ctx.kernel_code[i].is_compiled) {
430  kernel_source = opencl_ctx.kernel_code[i].kernel_string;
431  kernel_code_len = strlen(opencl_ctx.kernel_code[i].kernel_string);
432  kernel_code_idx = i;
433  break;
434  }
435  }
436  if (!kernel_source) {
437  av_log(&opencl_ctx, AV_LOG_ERROR,
438  "Unable to find OpenCL kernel source '%s'\n", program_name);
439  goto end;
440  }
441 
442  /* create a CL program from kernel source */
443  program = clCreateProgramWithSource(opencl_ctx.context, 1, &kernel_source, &kernel_code_len, &status);
444  if(status != CL_SUCCESS) {
445  av_log(&opencl_ctx, AV_LOG_ERROR,
446  "Unable to create OpenCL program '%s': %s\n", program_name, av_opencl_errstr(status));
447  program = NULL;
448  goto end;
449  }
450  status = clBuildProgram(program, 1, &(opencl_ctx.device_id), build_opts, NULL, NULL);
451  if (status != CL_SUCCESS) {
452  av_log(&opencl_ctx, AV_LOG_ERROR,
453  "Compilation failed with OpenCL program: %s\n", program_name);
454  program = NULL;
455  goto end;
456  }
457 
458  opencl_ctx.kernel_code[kernel_code_idx].is_compiled = 1;
459 end:
460  UNLOCK_OPENCL;
461  return program;
462 }
463 
464 cl_command_queue av_opencl_get_command_queue(void)
465 {
466  return opencl_ctx.command_queue;
467 }
468 
469 static int init_opencl_env(OpenclContext *opencl_ctx, AVOpenCLExternalEnv *ext_opencl_env)
470 {
471  cl_int status;
472  cl_context_properties cps[3];
473  int i, ret = 0;
474  AVOpenCLDeviceNode *device_node = NULL;
475 
476  if (ext_opencl_env) {
477  if (opencl_ctx->is_user_created)
478  return 0;
479  opencl_ctx->platform_id = ext_opencl_env->platform_id;
480  opencl_ctx->is_user_created = 1;
481  opencl_ctx->command_queue = ext_opencl_env->command_queue;
482  opencl_ctx->context = ext_opencl_env->context;
483  opencl_ctx->device_id = ext_opencl_env->device_id;
484  opencl_ctx->device_type = ext_opencl_env->device_type;
485  } else {
486  if (!opencl_ctx->is_user_created) {
487  if (!opencl_ctx->device_list.platform_num) {
488  ret = get_device_list(&opencl_ctx->device_list);
489  if (ret < 0) {
490  return ret;
491  }
492  }
493  if (opencl_ctx->platform_idx >= 0) {
494  if (opencl_ctx->device_list.platform_num < opencl_ctx->platform_idx + 1) {
495  av_log(opencl_ctx, AV_LOG_ERROR, "User set platform index not exist\n");
496  return AVERROR(EINVAL);
497  }
498  if (!opencl_ctx->device_list.platform_node[opencl_ctx->platform_idx]->device_num) {
499  av_log(opencl_ctx, AV_LOG_ERROR, "No devices in user specific platform with index %d\n",
500  opencl_ctx->platform_idx);
501  return AVERROR(EINVAL);
502  }
503  opencl_ctx->platform_id = opencl_ctx->device_list.platform_node[opencl_ctx->platform_idx]->platform_id;
504  } else {
505  /* get a usable platform by default*/
506  for (i = 0; i < opencl_ctx->device_list.platform_num; i++) {
507  if (opencl_ctx->device_list.platform_node[i]->device_num) {
508  opencl_ctx->platform_id = opencl_ctx->device_list.platform_node[i]->platform_id;
509  opencl_ctx->platform_idx = i;
510  break;
511  }
512  }
513  }
514  if (!opencl_ctx->platform_id) {
515  av_log(opencl_ctx, AV_LOG_ERROR, "Could not get OpenCL platforms\n");
516  return AVERROR_EXTERNAL;
517  }
518  /* get a usable device*/
519  if (opencl_ctx->device_idx >= 0) {
520  if (opencl_ctx->device_list.platform_node[opencl_ctx->platform_idx]->device_num < opencl_ctx->device_idx + 1) {
521  av_log(opencl_ctx, AV_LOG_ERROR,
522  "Could not get OpenCL device idx %d in the user set platform\n", opencl_ctx->platform_idx);
523  return AVERROR(EINVAL);
524  }
525  } else {
526  opencl_ctx->device_idx = 0;
527  }
528 
529  device_node = opencl_ctx->device_list.platform_node[opencl_ctx->platform_idx]->device_node[opencl_ctx->device_idx];
530  opencl_ctx->device_id = device_node->device_id;
531  opencl_ctx->device_type = device_node->device_type;
532 
533  /*
534  * Use available platform.
535  */
536  av_log(opencl_ctx, AV_LOG_VERBOSE, "Platform Name: %s, Device Name: %s\n",
537  opencl_ctx->device_list.platform_node[opencl_ctx->platform_idx]->platform_name,
538  device_node->device_name);
539  cps[0] = CL_CONTEXT_PLATFORM;
540  cps[1] = (cl_context_properties)opencl_ctx->platform_id;
541  cps[2] = 0;
542 
543  opencl_ctx->context = clCreateContextFromType(cps, opencl_ctx->device_type,
544  NULL, NULL, &status);
545  if (status != CL_SUCCESS) {
546  av_log(opencl_ctx, AV_LOG_ERROR,
547  "Could not get OpenCL context from device type: %s\n", av_opencl_errstr(status));
548  return AVERROR_EXTERNAL;
549  }
550  opencl_ctx->command_queue = clCreateCommandQueue(opencl_ctx->context, opencl_ctx->device_id,
551  0, &status);
552  if (status != CL_SUCCESS) {
553  av_log(opencl_ctx, AV_LOG_ERROR,
554  "Could not create OpenCL command queue: %s\n", av_opencl_errstr(status));
555  return AVERROR_EXTERNAL;
556  }
557  }
558  }
559  return ret;
560 }
561 
562 int av_opencl_init(AVOpenCLExternalEnv *ext_opencl_env)
563 {
564  int ret = init_opencl_mtx( );
565  if (ret < 0)
566  return ret;
567  LOCK_OPENCL;
568  if (!opencl_ctx.init_count) {
569  if (!opencl_ctx.opt_init_flag) {
570  av_opt_set_defaults(&opencl_ctx);
571  opencl_ctx.opt_init_flag = 1;
572  }
573  ret = init_opencl_env(&opencl_ctx, ext_opencl_env);
574  if (ret < 0)
575  goto end;
576  if (opencl_ctx.kernel_code_count <= 0) {
577  av_log(&opencl_ctx, AV_LOG_ERROR,
578  "No kernel code is registered, compile kernel file failed\n");
579  ret = AVERROR(EINVAL);
580  goto end;
581  }
582  }
583  opencl_ctx.init_count++;
584 end:
585  UNLOCK_OPENCL;
586  return ret;
587 }
588 
589 void av_opencl_uninit(void)
590 {
591  cl_int status;
592  LOCK_OPENCL;
593  opencl_ctx.init_count--;
594  if (opencl_ctx.is_user_created)
595  goto end;
596  if (opencl_ctx.init_count > 0)
597  goto end;
598  if (opencl_ctx.command_queue) {
599  status = clReleaseCommandQueue(opencl_ctx.command_queue);
600  if (status != CL_SUCCESS) {
601  av_log(&opencl_ctx, AV_LOG_ERROR,
602  "Could not release OpenCL command queue: %s\n", av_opencl_errstr(status));
603  }
604  opencl_ctx.command_queue = NULL;
605  }
606  if (opencl_ctx.context) {
607  status = clReleaseContext(opencl_ctx.context);
608  if (status != CL_SUCCESS) {
609  av_log(&opencl_ctx, AV_LOG_ERROR,
610  "Could not release OpenCL context: %s\n", av_opencl_errstr(status));
611  }
612  opencl_ctx.context = NULL;
613  }
614  free_device_list(&opencl_ctx.device_list);
615 end:
616  if (opencl_ctx.init_count <= 0)
617  av_opt_free(&opencl_ctx); //FIXME: free openclutils context
618  UNLOCK_OPENCL;
619 }
620 
621 int av_opencl_buffer_create(cl_mem *cl_buf, size_t cl_buf_size, int flags, void *host_ptr)
622 {
623  cl_int status;
624  *cl_buf = clCreateBuffer(opencl_ctx.context, flags, cl_buf_size, host_ptr, &status);
625  if (status != CL_SUCCESS) {
626  av_log(&opencl_ctx, AV_LOG_ERROR, "Could not create OpenCL buffer: %s\n", av_opencl_errstr(status));
627  return AVERROR_EXTERNAL;
628  }
629  return 0;
630 }
631 
632 void av_opencl_buffer_release(cl_mem *cl_buf)
633 {
634  cl_int status = 0;
635  if (!cl_buf)
636  return;
637  status = clReleaseMemObject(*cl_buf);
638  if (status != CL_SUCCESS) {
639  av_log(&opencl_ctx, AV_LOG_ERROR,
640  "Could not release OpenCL buffer: %s\n", av_opencl_errstr(status));
641  }
642  memset(cl_buf, 0, sizeof(*cl_buf));
643 }
644 
645 int av_opencl_buffer_write(cl_mem dst_cl_buf, uint8_t *src_buf, size_t buf_size)
646 {
647  cl_int status;
648  void *mapped = clEnqueueMapBuffer(opencl_ctx.command_queue, dst_cl_buf,
649  CL_TRUE, CL_MAP_WRITE, 0, sizeof(uint8_t) * buf_size,
650  0, NULL, NULL, &status);
651 
652  if (status != CL_SUCCESS) {
653  av_log(&opencl_ctx, AV_LOG_ERROR,
654  "Could not map OpenCL buffer: %s\n", av_opencl_errstr(status));
655  return AVERROR_EXTERNAL;
656  }
657  memcpy(mapped, src_buf, buf_size);
658 
659  status = clEnqueueUnmapMemObject(opencl_ctx.command_queue, dst_cl_buf, mapped, 0, NULL, NULL);
660  if (status != CL_SUCCESS) {
661  av_log(&opencl_ctx, AV_LOG_ERROR,
662  "Could not unmap OpenCL buffer: %s\n", av_opencl_errstr(status));
663  return AVERROR_EXTERNAL;
664  }
665  return 0;
666 }
667 
668 int av_opencl_buffer_read(uint8_t *dst_buf, cl_mem src_cl_buf, size_t buf_size)
669 {
670  cl_int status;
671  void *mapped = clEnqueueMapBuffer(opencl_ctx.command_queue, src_cl_buf,
672  CL_TRUE, CL_MAP_READ, 0, buf_size,
673  0, NULL, NULL, &status);
674 
675  if (status != CL_SUCCESS) {
676  av_log(&opencl_ctx, AV_LOG_ERROR,
677  "Could not map OpenCL buffer: %s\n", av_opencl_errstr(status));
678  return AVERROR_EXTERNAL;
679  }
680  memcpy(dst_buf, mapped, buf_size);
681 
682  status = clEnqueueUnmapMemObject(opencl_ctx.command_queue, src_cl_buf, mapped, 0, NULL, NULL);
683  if (status != CL_SUCCESS) {
684  av_log(&opencl_ctx, AV_LOG_ERROR,
685  "Could not unmap OpenCL buffer: %s\n", av_opencl_errstr(status));
686  return AVERROR_EXTERNAL;
687  }
688  return 0;
689 }
690 
691 int av_opencl_buffer_write_image(cl_mem dst_cl_buf, size_t cl_buffer_size, int dst_cl_offset,
692  uint8_t **src_data, int *plane_size, int plane_num)
693 {
694  int i, buffer_size = 0;
695  uint8_t *temp;
696  cl_int status;
697  void *mapped;
698  if ((unsigned int)plane_num > 8) {
699  return AVERROR(EINVAL);
700  }
701  for (i = 0;i < plane_num;i++) {
702  buffer_size += plane_size[i];
703  }
704  if (buffer_size > cl_buffer_size) {
705  av_log(&opencl_ctx, AV_LOG_ERROR,
706  "Cannot write image to OpenCL buffer: buffer too small\n");
707  return AVERROR(EINVAL);
708  }
709  mapped = clEnqueueMapBuffer(opencl_ctx.command_queue, dst_cl_buf,
710  CL_TRUE, CL_MAP_WRITE, 0, buffer_size + dst_cl_offset,
711  0, NULL, NULL, &status);
712  if (status != CL_SUCCESS) {
713  av_log(&opencl_ctx, AV_LOG_ERROR,
714  "Could not map OpenCL buffer: %s\n", av_opencl_errstr(status));
715  return AVERROR_EXTERNAL;
716  }
717  temp = mapped;
718  temp += dst_cl_offset;
719  for (i = 0; i < plane_num; i++) {
720  memcpy(temp, src_data[i], plane_size[i]);
721  temp += plane_size[i];
722  }
723  status = clEnqueueUnmapMemObject(opencl_ctx.command_queue, dst_cl_buf, mapped, 0, NULL, NULL);
724  if (status != CL_SUCCESS) {
725  av_log(&opencl_ctx, AV_LOG_ERROR,
726  "Could not unmap OpenCL buffer: %s\n", av_opencl_errstr(status));
727  return AVERROR_EXTERNAL;
728  }
729  return 0;
730 }
731 
732 int av_opencl_buffer_read_image(uint8_t **dst_data, int *plane_size, int plane_num,
733  cl_mem src_cl_buf, size_t cl_buffer_size)
734 {
735  int i,buffer_size = 0,ret = 0;
736  uint8_t *temp;
737  void *mapped;
738  cl_int status;
739  if ((unsigned int)plane_num > 8) {
740  return AVERROR(EINVAL);
741  }
742  for (i = 0; i < plane_num; i++) {
743  buffer_size += plane_size[i];
744  }
745  if (buffer_size > cl_buffer_size) {
746  av_log(&opencl_ctx, AV_LOG_ERROR,
747  "Cannot write image to CPU buffer: OpenCL buffer too small\n");
748  return AVERROR(EINVAL);
749  }
750  mapped = clEnqueueMapBuffer(opencl_ctx.command_queue, src_cl_buf,
751  CL_TRUE, CL_MAP_READ, 0, buffer_size,
752  0, NULL, NULL, &status);
753 
754  if (status != CL_SUCCESS) {
755  av_log(&opencl_ctx, AV_LOG_ERROR,
756  "Could not map OpenCL buffer: %s\n", av_opencl_errstr(status));
757  return AVERROR_EXTERNAL;
758  }
759  temp = mapped;
760  if (ret >= 0) {
761  for (i = 0; i < plane_num; i++) {
762  memcpy(dst_data[i], temp, plane_size[i]);
763  temp += plane_size[i];
764  }
765  }
766  status = clEnqueueUnmapMemObject(opencl_ctx.command_queue, src_cl_buf, mapped, 0, NULL, NULL);
767  if (status != CL_SUCCESS) {
768  av_log(&opencl_ctx, AV_LOG_ERROR,
769  "Could not unmap OpenCL buffer: %s\n", av_opencl_errstr(status));
770  return AVERROR_EXTERNAL;
771  }
772  return 0;
773 }
774 
775 int64_t av_opencl_benchmark(AVOpenCLDeviceNode *device_node, cl_platform_id platform,
776  int64_t (*benchmark)(AVOpenCLExternalEnv *ext_opencl_env))
777 {
778  int64_t ret = 0;
779  cl_int status;
780  cl_context_properties cps[3];
781  AVOpenCLExternalEnv *ext_opencl_env = NULL;
782 
783  ext_opencl_env = av_opencl_alloc_external_env();
784  ext_opencl_env->device_id = device_node->device_id;
785  ext_opencl_env->device_type = device_node->device_type;
786  av_log(&opencl_ctx, AV_LOG_VERBOSE, "Performing test on OpenCL device %s\n",
787  device_node->device_name);
788 
789  cps[0] = CL_CONTEXT_PLATFORM;
790  cps[1] = (cl_context_properties)platform;
791  cps[2] = 0;
792  ext_opencl_env->context = clCreateContextFromType(cps, ext_opencl_env->device_type,
793  NULL, NULL, &status);
794  if (status != CL_SUCCESS || !ext_opencl_env->context) {
795  ret = AVERROR_EXTERNAL;
796  goto end;
797  }
798  ext_opencl_env->command_queue = clCreateCommandQueue(ext_opencl_env->context,
799  ext_opencl_env->device_id, 0, &status);
800  if (status != CL_SUCCESS || !ext_opencl_env->command_queue) {
801  ret = AVERROR_EXTERNAL;
802  goto end;
803  }
804  ret = benchmark(ext_opencl_env);
805  if (ret < 0)
806  av_log(&opencl_ctx, AV_LOG_ERROR, "Benchmark failed with OpenCL device %s\n",
807  device_node->device_name);
808 end:
809  if (ext_opencl_env->command_queue)
810  clReleaseCommandQueue(ext_opencl_env->command_queue);
811  if (ext_opencl_env->context)
812  clReleaseContext(ext_opencl_env->context);
813  av_opencl_free_external_env(&ext_opencl_env);
814  return ret;
815 }
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