Revert "avutil/opencl: is_compiled flag not being cleared in av_opencl_uninit"
[ffmpeg.git] / libavutil / opencl.c
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 }