[FFmpeg-cvslog] opencl wrapper based on comments on 20130401
highgod0401
git at videolan.org
Mon Apr 1 13:38:01 CEST 2013
ffmpeg | branch: master | highgod0401 <highgod0401 at gmail.com> | Mon Apr 1 17:46:11 2013 +0800| [189cbc1a0357eff9ebda70d74f886f58d3d7d574] | committer: Michael Niedermayer
opencl wrapper based on comments on 20130401
Signed-off-by: Michael Niedermayer <michaelni at gmx.at>
> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=189cbc1a0357eff9ebda70d74f886f58d3d7d574
---
configure | 4 +
libavutil/Makefile | 3 +
libavutil/opencl.c | 718 ++++++++++++++++++++++++++++++++++++++++++++++++++++
libavutil/opencl.h | 200 +++++++++++++++
4 files changed, 925 insertions(+)
diff --git a/configure b/configure
index 8dc2500..f5196e1 100755
--- a/configure
+++ b/configure
@@ -234,6 +234,7 @@ External library support:
--enable-libxvid enable Xvid encoding via xvidcore,
native MPEG-4/Xvid encoder exists [no]
--enable-openal enable OpenAL 1.1 capture support [no]
+ --enable-opencl enable OpenCL code
--enable-openssl enable openssl [no]
--enable-x11grab enable X11 grabbing [no]
--enable-zlib enable zlib [autodetect]
@@ -1179,6 +1180,7 @@ EXTERNAL_LIBRARY_LIST="
libxavs
libxvid
openal
+ opencl
openssl
x11grab
zlib
@@ -3987,6 +3989,7 @@ enabled openal && { { for al_libs in "${OPENAL_LIBS}" "-lopenal" "-lOpenAL32
die "ERROR: openal not found"; } &&
{ check_cpp_condition "AL/al.h" "defined(AL_VERSION_1_1)" ||
die "ERROR: openal must be installed and version must be 1.1 or compatible"; }
+enabled opencl && require2 opencl CL/cl.h clEnqueueNDRangeKernel -lOpenCL
enabled openssl && { check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto ||
check_lib openssl/ssl.h SSL_library_init -lssl32 -leay32 ||
check_lib openssl/ssl.h SSL_library_init -lssl -lcrypto -lws2_32 -lgdi32 ||
@@ -4355,6 +4358,7 @@ echo "network support ${network-no}"
echo "threading support ${thread_type-no}"
echo "safe bitstream reader ${safe_bitstream_reader-no}"
echo "SDL support ${sdl-no}"
+echo "opencl enabled ${opencl-no}"
echo "texi2html enabled ${texi2html-no}"
echo "perl enabled ${perl-no}"
echo "pod2man enabled ${pod2man-no}"
diff --git a/libavutil/Makefile b/libavutil/Makefile
index 103ce5e..b520473 100644
--- a/libavutil/Makefile
+++ b/libavutil/Makefile
@@ -52,6 +52,8 @@ HEADERS = adler32.h \
HEADERS-$(CONFIG_LZO) += lzo.h
+HEADERS-$(CONFIG_OPENCL) += opencl.h
+
ARCH_HEADERS = bswap.h \
intmath.h \
intreadwrite.h \
@@ -106,6 +108,7 @@ OBJS = adler32.o \
xtea.o \
OBJS-$(CONFIG_LZO) += lzo.o
+OBJS-$(CONFIG_OPENCL) += opencl.o
OBJS += $(COMPAT_OBJS:%=../compat/%)
diff --git a/libavutil/opencl.c b/libavutil/opencl.c
new file mode 100644
index 0000000..dc3b859
--- /dev/null
+++ b/libavutil/opencl.c
@@ -0,0 +1,718 @@
+/*
+ * Copyright (C) 2012 Peng Gao <peng at multicorewareinc.com>
+ * Copyright (C) 2012 Li Cao <li at multicorewareinc.com>
+ * Copyright (C) 2012 Wei Gao <weigao at multicorewareinc.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "opencl.h"
+#include "avstring.h"
+#include "log.h"
+#include "avassert.h"
+
+#if HAVE_PTHREADS
+
+#include <pthread.h>
+static pthread_mutex_t atomic_opencl_lock = PTHREAD_MUTEX_INITIALIZER;
+
+#define LOCK_OPENCL pthread_mutex_lock(&atomic_opencl_lock);
+#define UNLOCK_OPENCL pthread_mutex_unlock(&atomic_opencl_lock);
+
+#elif !HAVE_THREADS
+#define LOCK_OPENCL
+#define UNLOCK_OPENCL
+#endif
+
+
+#define MAX_KERNEL_NUM 500
+#define MAX_KERNEL_CODE_NUM 200
+
+typedef struct {
+ int dev_idx;
+ int platform_idx;
+} UserSpecDevInfo;
+
+typedef struct {
+ int is_compiled;
+ const char *kernel_string;
+} KernelCode;
+
+typedef struct {
+ int init_count;
+ UserSpecDevInfo usr_spec_dev_info;
+ cl_platform_id platform_id;
+ cl_device_type device_type;
+ cl_context context;
+ cl_device_id *device_ids;
+ cl_device_id device_id;
+ cl_command_queue command_queue;
+ int program_count;
+ cl_program programs[MAX_KERNEL_CODE_NUM];
+ int kernel_code_count;
+ KernelCode kernel_code[MAX_KERNEL_CODE_NUM];
+ int kernel_count;
+ /**
+ * if set to 1, the OpenCL environment was created by the user and
+ * passed as AVOpenCLExternalEnv when initing ,0:created by opencl wrapper.
+ */
+ int is_user_created;
+} GPUEnv;
+
+typedef struct {
+ const AVClass *class;
+ int log_offset;
+ void *log_ctx;
+} OpenclUtils;
+
+static const AVClass openclutils_class = {"OPENCLUTILS", av_default_item_name,
+ NULL, LIBAVUTIL_VERSION_INT,
+ offsetof(OpenclUtils, log_offset),
+ offsetof(OpenclUtils, log_ctx)};
+static OpenclUtils openclutils = {&openclutils_class};
+static GPUEnv gpu_env;
+
+typedef struct {
+ int err_code;
+ const char *err_str;
+} OpenclErrorMsg;
+
+static const OpenclErrorMsg opencl_err_msg[] = {
+ {CL_DEVICE_NOT_FOUND, "DEVICE NOT FOUND"},
+ {CL_DEVICE_NOT_AVAILABLE, "DEVICE NOT AVAILABLE"},
+ {CL_COMPILER_NOT_AVAILABLE, "COMPILER NOT AVAILABLE"},
+ {CL_MEM_OBJECT_ALLOCATION_FAILURE, "MEM OBJECT ALLOCATION FAILURE"},
+ {CL_OUT_OF_RESOURCES, "OUT OF RESOURCES"},
+ {CL_OUT_OF_HOST_MEMORY, "OUT OF HOST MEMORY"},
+ {CL_PROFILING_INFO_NOT_AVAILABLE, "PROFILING INFO NOT AVAILABLE"},
+ {CL_MEM_COPY_OVERLAP, "MEM COPY OVERLAP"},
+ {CL_IMAGE_FORMAT_MISMATCH, "IMAGE FORMAT MISMATCH"},
+ {CL_IMAGE_FORMAT_NOT_SUPPORTED, "IMAGE FORMAT NOT_SUPPORTED"},
+ {CL_BUILD_PROGRAM_FAILURE, "BUILD PROGRAM FAILURE"},
+ {CL_MAP_FAILURE, "MAP FAILURE"},
+ {CL_MISALIGNED_SUB_BUFFER_OFFSET, "MISALIGNED SUB BUFFER OFFSET"},
+ {CL_EXEC_STATUS_ERROR_FOR_EVENTS_IN_WAIT_LIST, "EXEC STATUS ERROR FOR EVENTS IN WAIT LIST"},
+ {CL_COMPILE_PROGRAM_FAILURE, "COMPILE PROGRAM FAILURE"},
+ {CL_LINKER_NOT_AVAILABLE, "LINKER NOT AVAILABLE"},
+ {CL_LINK_PROGRAM_FAILURE, "LINK PROGRAM FAILURE"},
+ {CL_DEVICE_PARTITION_FAILED, "DEVICE PARTITION FAILED"},
+ {CL_KERNEL_ARG_INFO_NOT_AVAILABLE, "KERNEL ARG INFO NOT AVAILABLE"},
+ {CL_INVALID_VALUE, "INVALID VALUE"},
+ {CL_INVALID_DEVICE_TYPE, "INVALID DEVICE TYPE"},
+ {CL_INVALID_PLATFORM, "INVALID PLATFORM"},
+ {CL_INVALID_DEVICE, "INVALID DEVICE"},
+ {CL_INVALID_CONTEXT, "INVALID CONTEXT"},
+ {CL_INVALID_QUEUE_PROPERTIES, "INVALID QUEUE PROPERTIES"},
+ {CL_INVALID_COMMAND_QUEUE, "INVALID COMMAND QUEUE"},
+ {CL_INVALID_HOST_PTR, "INVALID HOST PTR"},
+ {CL_INVALID_MEM_OBJECT, "INVALID MEM OBJECT"},
+ {CL_INVALID_IMAGE_FORMAT_DESCRIPTOR, "INVALID IMAGE FORMAT DESCRIPTOR"},
+ {CL_INVALID_IMAGE_SIZE, "INVALID IMAGE SIZE"},
+ {CL_INVALID_SAMPLER, "INVALID SAMPLER"},
+ {CL_INVALID_BINARY, "INVALID BINARY"},
+ {CL_INVALID_BUILD_OPTIONS, "INVALID BUILD OPTIONS"},
+ {CL_INVALID_PROGRAM, "INVALID PROGRAM"},
+ {CL_INVALID_PROGRAM_EXECUTABLE, "INVALID PROGRAM EXECUTABLE"},
+ {CL_INVALID_KERNEL_NAME, "INVALID KERNEL NAME"},
+ {CL_INVALID_KERNEL_DEFINITION, "INVALID KERNEL DEFINITION"},
+ {CL_INVALID_KERNEL, "INVALID KERNEL"},
+ {CL_INVALID_ARG_INDEX, "INVALID ARG INDEX"},
+ {CL_INVALID_ARG_VALUE, "INVALID ARG VALUE"},
+ {CL_INVALID_ARG_SIZE, "INVALID ARG_SIZE"},
+ {CL_INVALID_KERNEL_ARGS, "INVALID KERNEL ARGS"},
+ {CL_INVALID_WORK_DIMENSION, "INVALID WORK DIMENSION"},
+ {CL_INVALID_WORK_GROUP_SIZE, "INVALID WORK GROUP SIZE"},
+ {CL_INVALID_WORK_ITEM_SIZE, "INVALID WORK ITEM SIZE"},
+ {CL_INVALID_GLOBAL_OFFSET, "INVALID GLOBAL OFFSET"},
+ {CL_INVALID_EVENT_WAIT_LIST, "INVALID EVENT WAIT LIST"},
+ {CL_INVALID_EVENT, "INVALID EVENT"},
+ {CL_INVALID_OPERATION, "INVALID OPERATION"},
+ {CL_INVALID_GL_OBJECT, "INVALID GL OBJECT"},
+ {CL_INVALID_BUFFER_SIZE, "INVALID BUFFER SIZE"},
+ {CL_INVALID_MIP_LEVEL, "INVALID MIP LEVEL"},
+ {CL_INVALID_GLOBAL_WORK_SIZE, "INVALID GLOBAL WORK SIZE"},
+ {CL_INVALID_PROPERTY, "INVALID PROPERTY"},
+ {CL_INVALID_IMAGE_DESCRIPTOR, "INVALID IMAGE DESCRIPTOR"},
+ {CL_INVALID_COMPILER_OPTIONS, "INVALID COMPILER OPTIONS"},
+ {CL_INVALID_LINKER_OPTIONS, "INVALID LINKER OPTIONS"},
+ {CL_INVALID_DEVICE_PARTITION_COUNT, "INVALID DEVICE PARTITION COUNT"},
+};
+
+static const char *opencl_errstr(cl_int status)
+{
+ int i;
+ for (i = 0; i < sizeof(opencl_err_msg); i++) {
+ if (opencl_err_msg[i].err_code == status)
+ return opencl_err_msg[i].err_str;
+ }
+ return "unknown error";
+}
+
+AVOpenCLExternalEnv *av_opencl_alloc_external_env(void)
+{
+ AVOpenCLExternalEnv *ext = av_mallocz(sizeof(AVOpenCLExternalEnv));
+ if (!ext) {
+ av_log(&openclutils, AV_LOG_ERROR,
+ "Could not malloc external opencl environment data space\n");
+ }
+ return ext;
+}
+
+void av_opencl_free_external_env(AVOpenCLExternalEnv **ext_opencl_env)
+{
+ av_freep(ext_opencl_env);
+}
+
+int av_opencl_register_kernel_code(const char *kernel_code)
+{
+ int i, ret = 0;
+ LOCK_OPENCL;
+ if (gpu_env.kernel_code_count >= MAX_KERNEL_CODE_NUM) {
+ av_log(&openclutils, AV_LOG_ERROR,
+ "Could not register kernel code, maximum number of registered kernel code %d already reached\n",
+ MAX_KERNEL_CODE_NUM);
+ ret = AVERROR(EINVAL);
+ goto end;
+ }
+ for (i = 0; i < gpu_env.kernel_code_count; i++) {
+ if (gpu_env.kernel_code[i].kernel_string == kernel_code) {
+ av_log(&openclutils, AV_LOG_WARNING, "Same kernel code has been registered\n");
+ goto end;
+ }
+ }
+ gpu_env.kernel_code[gpu_env.kernel_code_count].kernel_string = kernel_code;
+ gpu_env.kernel_code[gpu_env.kernel_code_count].is_compiled = 0;
+ gpu_env.kernel_code_count++;
+end:
+ UNLOCK_OPENCL;
+ return ret;
+}
+
+int av_opencl_create_kernel(AVOpenCLKernelEnv *env, const char *kernel_name)
+{
+ cl_int status;
+ int i, ret = 0;
+ LOCK_OPENCL;
+ if (strlen(kernel_name) + 1 > AV_OPENCL_MAX_KERNEL_NAME_SIZE) {
+ av_log(&openclutils, AV_LOG_ERROR, "Created kernel name %s is too long\n", kernel_name);
+ ret = AVERROR(EINVAL);
+ goto end;
+ }
+ if (!env->kernel) {
+ if (gpu_env.kernel_count >= MAX_KERNEL_NUM) {
+ av_log(&openclutils, AV_LOG_ERROR,
+ "Could not create kernel with name '%s', maximum number of kernels %d already reached\n",
+ kernel_name, MAX_KERNEL_NUM);
+ ret = AVERROR(EINVAL);
+ goto end;
+ }
+ for (i = 0; i < gpu_env.program_count; i++) {
+ env->kernel = clCreateKernel(gpu_env.programs[i], kernel_name, &status);
+ if (status == CL_SUCCESS)
+ break;
+ }
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not create OpenCL kernel: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ gpu_env.kernel_count++;
+ env->command_queue = gpu_env.command_queue;
+ av_strlcpy(env->kernel_name, kernel_name, sizeof(env->kernel_name));
+ }
+end:
+ UNLOCK_OPENCL;
+ return ret;
+}
+
+void av_opencl_release_kernel(AVOpenCLKernelEnv *env)
+{
+ cl_int status;
+ LOCK_OPENCL
+ if (!env->kernel)
+ goto end;
+ status = clReleaseKernel(env->kernel);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not release kernel: %s\n",
+ opencl_errstr(status));
+ }
+ env->kernel = NULL;
+ env->command_queue = NULL;
+ env->kernel_name[0] = 0;
+ gpu_env.kernel_count--;
+end:
+ UNLOCK_OPENCL
+}
+
+static int init_opencl_env(GPUEnv *gpu_env, AVOpenCLExternalEnv *ext_opencl_env)
+{
+ size_t device_length;
+ cl_int status;
+ cl_uint num_platforms, num_devices;
+ cl_platform_id *platform_ids = NULL;
+ cl_context_properties cps[3];
+ char platform_name[100];
+ int i, ret = 0;
+ cl_device_type device_type[] = {CL_DEVICE_TYPE_GPU, CL_DEVICE_TYPE_CPU, CL_DEVICE_TYPE_DEFAULT};
+ if (ext_opencl_env) {
+ if (gpu_env->is_user_created)
+ return 0;
+ gpu_env->platform_id = ext_opencl_env->platform_id;
+ gpu_env->is_user_created = 1;
+ gpu_env->command_queue = ext_opencl_env->command_queue;
+ gpu_env->context = ext_opencl_env->context;
+ gpu_env->device_ids = ext_opencl_env->device_ids;
+ gpu_env->device_id = ext_opencl_env->device_id;
+ gpu_env->device_type = ext_opencl_env->device_type;
+ } else {
+ if (!gpu_env->is_user_created) {
+ status = clGetPlatformIDs(0, NULL, &num_platforms);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL platform ids: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ if (gpu_env->usr_spec_dev_info.platform_idx >= 0) {
+ if (num_platforms < gpu_env->usr_spec_dev_info.platform_idx + 1) {
+ av_log(&openclutils, AV_LOG_ERROR, "User set platform index not exist\n");
+ return AVERROR(EINVAL);
+ }
+ }
+ if (num_platforms > 0) {
+ platform_ids = av_mallocz(num_platforms * sizeof(cl_platform_id));
+ if (!platform_ids) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+ status = clGetPlatformIDs(num_platforms, platform_ids, NULL);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL platform ids: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ i = 0;
+ if (gpu_env->usr_spec_dev_info.platform_idx >= 0) {
+ i = gpu_env->usr_spec_dev_info.platform_idx;
+ }
+ while (i < num_platforms) {
+ status = clGetPlatformInfo(platform_ids[i], CL_PLATFORM_VENDOR,
+ sizeof(platform_name), platform_name,
+ NULL);
+
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL platform info: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ gpu_env->platform_id = platform_ids[i];
+ status = clGetDeviceIDs(gpu_env->platform_id, CL_DEVICE_TYPE_GPU,
+ 0, NULL, &num_devices);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL device number:%s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ if (num_devices == 0) {
+ //find CPU device
+ status = clGetDeviceIDs(gpu_env->platform_id, CL_DEVICE_TYPE_CPU,
+ 0, NULL, &num_devices);
+ }
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL device ids: %s\n", opencl_errstr(status));
+ ret = AVERROR(EINVAL);;
+ goto end;
+ }
+ if (num_devices)
+ break;
+ if (gpu_env->usr_spec_dev_info.platform_idx >= 0) {
+ av_log(&openclutils, AV_LOG_ERROR, "Device number of user set platform is 0\n");
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ i++;
+
+ }
+ }
+ if (!gpu_env->platform_id) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL platforms\n");
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ if (gpu_env->usr_spec_dev_info.dev_idx >= 0) {
+ if (num_devices < gpu_env->usr_spec_dev_info.dev_idx + 1) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL device idx in the user set platform\n");
+ ret = AVERROR(EINVAL);;
+ goto end;
+ }
+ }
+
+ /*
+ * Use available platform.
+ */
+
+ av_log(&openclutils, AV_LOG_VERBOSE, "Platform Name: %s\n", platform_name);
+ cps[0] = CL_CONTEXT_PLATFORM;
+ cps[1] = (cl_context_properties)gpu_env->platform_id;
+ cps[2] = 0;
+ /* Check for GPU. */
+
+ for (i = 0; i < sizeof(device_type); i++) {
+ gpu_env->device_type = device_type[i];
+ gpu_env->context = clCreateContextFromType(cps, gpu_env->device_type,
+ NULL, NULL, &status);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL context from device type: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ if (gpu_env->context)
+ break;
+ }
+ if (!gpu_env->context) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL context from device type\n");
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ /* Detect OpenCL devices. */
+ /* First, get the size of device list data */
+ status = clGetContextInfo(gpu_env->context, CL_CONTEXT_DEVICES,
+ 0, NULL, &device_length);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL device length: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ if (device_length == 0) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL device length\n");
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ /* Now allocate memory for device list based on the size we got earlier */
+ gpu_env->device_ids = av_mallocz(device_length);
+ if (!gpu_env->device_ids) {
+ ret = AVERROR(ENOMEM);
+ goto end;
+ }
+ /* Now, get the device list data */
+ status = clGetContextInfo(gpu_env->context, CL_CONTEXT_DEVICES, device_length,
+ gpu_env->device_ids, NULL);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not get OpenCL context info: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ /* Create OpenCL command queue. */
+ i = 0;
+ if (gpu_env->usr_spec_dev_info.dev_idx >= 0) {
+ i = gpu_env->usr_spec_dev_info.dev_idx;
+ }
+ gpu_env->command_queue = clCreateCommandQueue(gpu_env->context, gpu_env->device_ids[i],
+ 0, &status);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not create OpenCL command queue: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ }
+ }
+end:
+ av_free(platform_ids);
+ return ret;
+}
+
+static int compile_kernel_file(GPUEnv *gpu_env, const char *build_options)
+{
+ cl_int status;
+ char *temp, *source_str = NULL;
+ size_t source_str_len = 0;
+ int i, ret = 0;
+
+ for (i = 0; i < gpu_env->kernel_code_count; i++) {
+ if (!gpu_env->kernel_code[i].is_compiled)
+ source_str_len += strlen(gpu_env->kernel_code[i].kernel_string);
+ }
+ if (!source_str_len) {
+ return 0;
+ }
+ source_str = av_mallocz(source_str_len + 1);
+ if (!source_str) {
+ return AVERROR(ENOMEM);
+ }
+ temp = source_str;
+ for (i = 0; i < gpu_env->kernel_code_count; i++) {
+ if (!gpu_env->kernel_code[i].is_compiled) {
+ memcpy(temp, gpu_env->kernel_code[i].kernel_string,
+ strlen(gpu_env->kernel_code[i].kernel_string));
+ gpu_env->kernel_code[i].is_compiled = 1;
+ temp += strlen(gpu_env->kernel_code[i].kernel_string);
+ }
+ }
+ /* create a CL program using the kernel source */
+ gpu_env->programs[gpu_env->program_count] = clCreateProgramWithSource(gpu_env->context,
+ 1, (const char **)(&source_str),
+ &source_str_len, &status);
+ if(status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not create OpenCL program with source code: %s\n",
+ opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ if (!gpu_env->programs[gpu_env->program_count]) {
+ av_log(&openclutils, AV_LOG_ERROR, "Created program is NULL\n");
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ i = 0;
+ if (gpu_env->usr_spec_dev_info.dev_idx >= 0)
+ i = gpu_env->usr_spec_dev_info.dev_idx;
+ /* create a cl program executable for all the devices specified */
+ if (!gpu_env->is_user_created)
+ status = clBuildProgram(gpu_env->programs[gpu_env->program_count], 1, &gpu_env->device_ids[i],
+ build_options, NULL, NULL);
+ else
+ status = clBuildProgram(gpu_env->programs[gpu_env->program_count], 1, &(gpu_env->device_id),
+ build_options, NULL, NULL);
+
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not compile OpenCL kernel: %s\n", opencl_errstr(status));
+ ret = AVERROR_EXTERNAL;
+ goto end;
+ }
+ gpu_env->program_count++;
+end:
+ av_free(source_str);
+ return ret;
+}
+
+int av_opencl_init(AVDictionary *options, AVOpenCLExternalEnv *ext_opencl_env)
+{
+ int ret = 0;
+ AVDictionaryEntry *opt_build_entry;
+ AVDictionaryEntry *opt_platform_entry;
+ AVDictionaryEntry *opt_device_entry;
+ LOCK_OPENCL
+ if (!gpu_env.init_count) {
+ opt_platform_entry = av_dict_get(options, "platform_idx", NULL, 0);
+ opt_device_entry = av_dict_get(options, "device_idx", NULL, 0);
+ /*initialize devices, context, command_queue*/
+ gpu_env.usr_spec_dev_info.platform_idx = -1;
+ gpu_env.usr_spec_dev_info.dev_idx = -1;
+ if (opt_platform_entry) {
+ gpu_env.usr_spec_dev_info.platform_idx = strtol(opt_platform_entry->value, NULL, 10);
+ }
+ if (opt_device_entry) {
+ gpu_env.usr_spec_dev_info.dev_idx = strtol(opt_device_entry->value, NULL, 10);
+ }
+ ret = init_opencl_env(&gpu_env, ext_opencl_env);
+ if (ret < 0)
+ goto end;
+ }
+ /*initialize program, kernel_name, kernel_count*/
+ opt_build_entry = av_dict_get(options, "build_options", NULL, 0);
+ if (opt_build_entry)
+ ret = compile_kernel_file(&gpu_env, opt_build_entry->value);
+ else
+ ret = compile_kernel_file(&gpu_env, NULL);
+ if (ret < 0)
+ goto end;
+ av_assert1(gpu_env.kernel_code_count > 0);
+ gpu_env.init_count++;
+
+end:
+ UNLOCK_OPENCL
+ return ret;
+}
+
+void av_opencl_uninit(void)
+{
+ cl_int status;
+ int i;
+ LOCK_OPENCL
+ gpu_env.init_count--;
+ if (gpu_env.is_user_created)
+ goto end;
+ if ((gpu_env.init_count > 0) || (gpu_env.kernel_count > 0))
+ goto end;
+ for (i = 0; i < gpu_env.program_count; i++) {
+ if (gpu_env.programs[i]) {
+ status = clReleaseProgram(gpu_env.programs[i]);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not release OpenCL program: %s\n", opencl_errstr(status));
+ }
+ gpu_env.programs[i] = NULL;
+ }
+ }
+ if (gpu_env.command_queue) {
+ status = clReleaseCommandQueue(gpu_env.command_queue);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not release OpenCL command queue: %s\n", opencl_errstr(status));
+ }
+ gpu_env.command_queue = NULL;
+ }
+ if (gpu_env.context) {
+ status = clReleaseContext(gpu_env.context);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not release OpenCL context: %s\n", opencl_errstr(status));
+ }
+ gpu_env.context = NULL;
+ }
+ av_freep(&(gpu_env.device_ids));
+end:
+ UNLOCK_OPENCL
+}
+
+int av_opencl_buffer_create(cl_mem *cl_buf, size_t cl_buf_size, int flags, void *host_ptr)
+{
+ cl_int status;
+ *cl_buf = clCreateBuffer(gpu_env.context, flags, cl_buf_size, host_ptr, &status);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not create OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ return 0;
+}
+
+void av_opencl_buffer_release(cl_mem *cl_buf)
+{
+ cl_int status = 0;
+ if (!cl_buf)
+ return;
+ status = clReleaseMemObject(*cl_buf);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not release OpenCL buffer: %s\n", opencl_errstr(status));
+ }
+ memset(cl_buf, 0, sizeof(*cl_buf));
+}
+
+int av_opencl_buffer_write(cl_mem dst_cl_buf, uint8_t *src_buf, size_t buf_size)
+{
+ cl_int status;
+ void *mapped = clEnqueueMapBuffer(gpu_env.command_queue, dst_cl_buf,
+ CL_TRUE,CL_MAP_WRITE, 0, sizeof(uint8_t) * buf_size,
+ 0, NULL, NULL, &status);
+
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not map OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ memcpy(mapped, src_buf, buf_size);
+
+ status = clEnqueueUnmapMemObject(gpu_env.command_queue, dst_cl_buf, mapped, 0, NULL, NULL);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not unmap OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ return 0;
+}
+
+int av_opencl_buffer_read(uint8_t *dst_buf, cl_mem src_cl_buf, size_t buf_size)
+{
+ cl_int status;
+ void *mapped = clEnqueueMapBuffer(gpu_env.command_queue, src_cl_buf,
+ CL_TRUE,CL_MAP_READ, 0, buf_size,
+ 0, NULL, NULL, &status);
+
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not map OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ memcpy(dst_buf, mapped, buf_size);
+
+ status = clEnqueueUnmapMemObject(gpu_env.command_queue, src_cl_buf, mapped, 0, NULL, NULL);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not unmap OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ return 0;
+}
+
+int av_opencl_buffer_write_image(cl_mem dst_cl_buf, size_t cl_buffer_size, int dst_cl_offset,
+ uint8_t **src_data, int *plane_size, int plane_num)
+{
+ int i, buffer_size = 0;
+ uint8_t *temp;
+ cl_int status;
+ void *mapped;
+ if ((unsigned int)plane_num > 8) {
+ return AVERROR(EINVAL);
+ }
+ for (i = 0;i < plane_num;i++) {
+ buffer_size += plane_size[i];
+ }
+ if (buffer_size > cl_buffer_size) {
+ av_log(&openclutils, AV_LOG_ERROR, "Cannot write image to OpenCL buffer: buffer too small\n");
+ return AVERROR(EINVAL);
+ }
+ mapped = clEnqueueMapBuffer(gpu_env.command_queue, dst_cl_buf,
+ CL_TRUE,CL_MAP_WRITE, 0, buffer_size + dst_cl_offset,
+ 0, NULL, NULL, &status);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not map OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ temp = mapped;
+ temp += dst_cl_offset;
+ for (i = 0; i < plane_num; i++) {
+ memcpy(temp, src_data[i], plane_size[i]);
+ temp += plane_size[i];
+ }
+ status = clEnqueueUnmapMemObject(gpu_env.command_queue, dst_cl_buf, mapped, 0, NULL, NULL);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not unmap OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ return 0;
+}
+
+int av_opencl_buffer_read_image(uint8_t **dst_data, int *plane_size, int plane_num,
+ cl_mem src_cl_buf, size_t cl_buffer_size)
+{
+ int i,buffer_size = 0,ret = 0;
+ uint8_t *temp;
+ void *mapped;
+ cl_int status;
+ if ((unsigned int)plane_num > 8) {
+ return AVERROR(EINVAL);
+ }
+ for (i = 0;i < plane_num;i++) {
+ buffer_size += plane_size[i];
+ }
+ if (buffer_size > cl_buffer_size) {
+ av_log(&openclutils, AV_LOG_ERROR, "Cannot write image to CPU buffer: OpenCL buffer too small\n");
+ return AVERROR(EINVAL);
+ }
+ mapped = clEnqueueMapBuffer(gpu_env.command_queue, src_cl_buf,
+ CL_TRUE,CL_MAP_READ, 0, buffer_size,
+ 0, NULL, NULL, &status);
+
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not map OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ temp = mapped;
+ if (ret >= 0) {
+ for (i = 0;i < plane_num;i++) {
+ memcpy(dst_data[i], temp, plane_size[i]);
+ temp += plane_size[i];
+ }
+ }
+ status = clEnqueueUnmapMemObject(gpu_env.command_queue, src_cl_buf, mapped, 0, NULL, NULL);
+ if (status != CL_SUCCESS) {
+ av_log(&openclutils, AV_LOG_ERROR, "Could not unmap OpenCL buffer: %s\n", opencl_errstr(status));
+ return AVERROR_EXTERNAL;
+ }
+ return 0;
+}
diff --git a/libavutil/opencl.h b/libavutil/opencl.h
new file mode 100644
index 0000000..81ba1e4
--- /dev/null
+++ b/libavutil/opencl.h
@@ -0,0 +1,200 @@
+/*
+ * Copyright (C) 2012 Peng Gao <peng at multicorewareinc.com>
+ * Copyright (C) 2012 Li Cao <li at multicorewareinc.com>
+ * Copyright (C) 2012 Wei Gao <weigao at multicorewareinc.com>
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * OpenCL wrapper
+ *
+ * This interface is considered still experimental and its API and ABI may
+ * change without prior notice.
+ */
+
+#ifndef LIBAVUTIL_OPENCLWRAPPER_H
+#define LIBAVUTIL_OPENCLWRAPPER_H
+
+#include <CL/cl.h>
+#include "config.h"
+#include "dict.h"
+
+#define AV_OPENCL_KERNEL( ... )# __VA_ARGS__
+
+#define AV_OPENCL_MAX_KERNEL_NAME_SIZE 150
+
+typedef struct {
+ cl_command_queue command_queue;
+ cl_kernel kernel;
+ char kernel_name[AV_OPENCL_MAX_KERNEL_NAME_SIZE];
+} AVOpenCLKernelEnv;
+
+typedef struct {
+ cl_platform_id platform_id;
+ cl_device_type device_type;
+ cl_context context;
+ cl_device_id *device_ids;
+ cl_device_id device_id;
+ cl_command_queue command_queue;
+ char *platform_name;
+} AVOpenCLExternalEnv;
+
+/**
+ * Allocate OpenCL external environment.
+ *
+ * It must be freed with av_opencl_free_external_env().
+ *
+ * @return pointer to allocated OpenCL external environment
+ */
+AVOpenCLExternalEnv *av_opencl_alloc_external_env(void);
+
+/**
+ * Free OpenCL external environment.
+ *
+ * @param ext_opencl_env pointer to OpenCL external environment created by av_opencl_alloc_external_env()
+ */
+void av_opencl_free_external_env(AVOpenCLExternalEnv **ext_opencl_env);
+
+/**
+ * Register kernel code.
+ *
+ * The registered kernel code is stored in a global context, and compiled
+ * in the runtime environment when av_opencl_init() is called.
+ *
+ * @param kernel_code kernel code to be compiled in the OpenCL runtime environment
+ * @return >=0 on success, a negative error code in case of failure
+ */
+int av_opencl_register_kernel_code(const char *kernel_code);
+
+/**
+ * Initialize the run time OpenCL environment and compile the kernel code registered with
+ * av_opencl_register_kernel_code().
+ *
+ * Currently, the only accepted option is "build_options", used to set
+ * options to compile registered kernels code. See reference "OpenCL
+ * Specification Version: 1.2 chapter 5.6.4".
+ *
+ * @param options dictionary of key/value options
+ * @param ext_opencl_env external OpenCL environment, created by an
+ * application program, ignored if set to NULL
+ * @return >=0 on success, a negative error code in case of failure
+ */
+ int av_opencl_init(AVDictionary *options, AVOpenCLExternalEnv *ext_opencl_env);
+
+/**
+ * Create kernel object in the specified kernel environment.
+ *
+ * @param env pointer to kernel environment which is filled with the environment,
+ * used to run the kernel
+ * @param kernel_name kernel function name
+ * @return >=0 on success, a negative error code in case of failure
+ */
+int av_opencl_create_kernel(AVOpenCLKernelEnv *env, const char *kernel_name);
+
+/**
+ * Create OpenCL buffer.
+ *
+ * The buffer is used to save the data used or created by an OpenCL
+ * kernel.
+ * The created buffer must be released with av_opencl_buffer_release().
+ *
+ * See clCreateBuffer() function reference for more information about
+ * the parameters.
+ *
+ * @param cl_buf pointer to OpenCL buffer
+ * @param cl_buf_size size in bytes of the OpenCL buffer to create
+ * @param flags flags used to control buffer attributes
+ * @param host_ptr host pointer of the OpenCL buffer
+ * @return >=0 on success, a negative error code in case of failure
+ */
+int av_opencl_buffer_create(cl_mem *cl_buf, size_t cl_buf_size, int flags, void *host_ptr);
+
+/**
+ * Write OpenCL buffer with data from src_buf.
+ *
+ * @param dst_cl_buf pointer to OpenCL destination buffer
+ * @param src_buf pointer to source buffer
+ * @param buf_size size in bytes of the source and destination buffers
+ * @return >=0 on success, a negative error code in case of failure
+ */
+int av_opencl_buffer_write(cl_mem dst_cl_buf, uint8_t *src_buf, size_t buf_size);
+
+/**
+ * Read data from OpenCL buffer to memory buffer.
+ *
+ * @param dst_buf pointer to destination buffer (CPU memory)
+ * @param src_cl_buf pointer to source OpenCL buffer
+ * @param buf_size size in bytes of the source and destination buffers
+ * @return >=0 on success, a negative error code in case of failure
+ */
+int av_opencl_buffer_read(uint8_t *dst_buf, cl_mem src_cl_buf, size_t buf_size);
+
+/**
+ * Write image data from memory to OpenCL buffer.
+ *
+ * The source must be an array of pointers to image plane buffers.
+ *
+ * @param dst_cl_buf pointer to destination OpenCL buffer
+ * @param dst_cl_buf_size size in bytes of OpenCL buffer
+ * @param dst_cl_buf_offset the offset of the OpenCL buffer start position
+ * @param src_data array of pointers to source plane buffers
+ * @param src_plane_sizes array of sizes in bytes of the source plane buffers
+ * @param src_plane_num number of source image planes
+ * @return >=0 on success, a negative error code in case of failure
+ */
+int av_opencl_buffer_write_image(cl_mem dst_cl_buf, size_t cl_buffer_size, int dst_cl_offset,
+ uint8_t **src_data, int *plane_size, int plane_num);
+/**
+ * Read image data from OpenCL buffer.
+ *
+ * src buffer is OpenCL buffer, dst buffer is frame buffer(data[0],data[1]....).
+ *
+ * @param dst_data array of pointers to destination plane buffers
+ * @param dst_plane_sizes array of pointers to destination plane buffers
+ * @param dst_plane_num number of destination image planes
+ * @param src_cl_buf pointer to source OpenCL buffer
+ * @param src_cl_buf_size size in bytes of OpenCL buffer
+ * @return >=0 on success, a negative error code in case of failure
+ */
+
+int av_opencl_buffer_read_image(uint8_t **dst_data, int *plane_size, int plane_num,
+ cl_mem src_cl_buf, size_t cl_buffer_size);
+/**
+ * Release OpenCL buffer.
+ *
+ * @param cl_buf pointer to OpenCL buffer to release, which was previously filled with av_opencl_buffer_create()
+ */
+void av_opencl_buffer_release(cl_mem *cl_buf);
+
+/**
+ * Release kernel object.
+ *
+ * @param env kernel environment where the kernel object was created with av_opencl_create_kernel
+ */
+void av_opencl_release_kernel(AVOpenCLKernelEnv *env);
+
+/**
+ * Release OpenCL environment.
+ *
+ * The OpenCL environment is effectively released only if all the created
+ * kernels had been released with av_opencl_release_kernel().
+ */
+void av_opencl_uninit(void);
+
+#endif/*LIBAVUTIL_OPENCL_H*/
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