ffmpeg/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 }