libavfilter/vf_program_opencl.c - third_party/ffmpeg - Git at Google

 /*
  * 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 "libavutil/avstring.h"
 #include "libavutil/log.h"
 #include "libavutil/mem.h"
 #include "libavutil/opt.h"
 #include "libavutil/pixdesc.h"

 #include "avfilter.h"
 #include "framesync.h"
 #include "internal.h"
 #include "opencl.h"
 #include "video.h"

 typedef struct ProgramOpenCLContext {
     OpenCLFilterContext ocf;

     int                 loaded;
     cl_uint             index;
     cl_kernel           kernel;
     cl_command_queue    command_queue;

     FFFrameSync         fs;
     AVFrame           **frames;

     const char         *source_file;
     const char         *kernel_name;
     int                 nb_inputs;
     int                 width, height;
     enum AVPixelFormat  source_format;
     AVRational          source_rate;
 } ProgramOpenCLContext;

 static int program_opencl_load(AVFilterContext *avctx)
 {
     ProgramOpenCLContext *ctx = avctx->priv;
     cl_int cle;
     int err;

     err = ff_opencl_filter_load_program_from_file(avctx, ctx->source_file);
     if (err < 0)
         return err;

     ctx->command_queue = clCreateCommandQueue(ctx->ocf.hwctx->context,
                                               ctx->ocf.hwctx->device_id,
                                               0, &cle);
     if (!ctx->command_queue) {
         av_log(avctx, AV_LOG_ERROR, "Failed to create OpenCL "
                "command queue: %d.\n", cle);
         return AVERROR(EIO);
     }

     ctx->kernel = clCreateKernel(ctx->ocf.program, ctx->kernel_name, &cle);
     if (!ctx->kernel) {
         if (cle == CL_INVALID_KERNEL_NAME) {
             av_log(avctx, AV_LOG_ERROR, "Kernel function '%s' not found in "
                    "program.\n", ctx->kernel_name);
         } else {
             av_log(avctx, AV_LOG_ERROR, "Failed to create kernel: %d.\n", cle);
         }
         return AVERROR(EIO);
     }

     ctx->loaded = 1;
     return 0;
 }

 static int program_opencl_run(AVFilterContext *avctx)
 {
     AVFilterLink     *outlink = avctx->outputs[0];
     ProgramOpenCLContext *ctx = avctx->priv;
     AVFrame *output = NULL;
     cl_int cle;
     size_t global_work[2];
     cl_mem src, dst;
     int err, input, plane;

     if (!ctx->loaded) {
         err = program_opencl_load(avctx);
         if (err < 0)
             return err;
     }

     output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
     if (!output) {
         err = AVERROR(ENOMEM);
         goto fail;
     }

     for (plane = 0; plane < FF_ARRAY_ELEMS(output->data); plane++) {
         dst = (cl_mem)output->data[plane];
         if (!dst)
             break;

         cle = clSetKernelArg(ctx->kernel, 0, sizeof(cl_mem), &dst);
         if (cle != CL_SUCCESS) {
             av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
                    "destination image argument: %d.\n", cle);
             err = AVERROR_UNKNOWN;
             goto fail;
         }
         cle = clSetKernelArg(ctx->kernel, 1, sizeof(cl_uint), &ctx->index);
         if (cle != CL_SUCCESS) {
             av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
                    "index argument: %d.\n", cle);
             err = AVERROR_UNKNOWN;
             goto fail;
         }

         for (input = 0; input < ctx->nb_inputs; input++) {
             av_assert0(ctx->frames[input]);

             src = (cl_mem)ctx->frames[input]->data[plane];
             av_assert0(src);

             cle = clSetKernelArg(ctx->kernel, 2 + input, sizeof(cl_mem), &src);
             if (cle != CL_SUCCESS) {
                 av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
                        "source image argument %d: %d.\n", input, cle);
                 err = AVERROR_UNKNOWN;
                 goto fail;
             }
         }

         err = ff_opencl_filter_work_size_from_image(avctx, global_work,
                                                     output, plane, 0);
         if (err < 0)
             goto fail;

         av_log(avctx, AV_LOG_DEBUG, "Run kernel on plane %d "
                "(%zux%zu).\n", plane, global_work[0], global_work[1]);

         cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->kernel, 2, NULL,
                                      global_work, NULL, 0, NULL, NULL);
         CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue kernel: %d.\n", cle);
     }

     cle = clFinish(ctx->command_queue);
     CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle);

     if (ctx->nb_inputs > 0) {
         err = av_frame_copy_props(output, ctx->frames[0]);
         if (err < 0)
             goto fail;
     } else {
         output->pts = ctx->index;
     }
     ++ctx->index;

     av_log(ctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
            av_get_pix_fmt_name(output->format),
            output->width, output->height, output->pts);

     return ff_filter_frame(outlink, output);

 fail:
     clFinish(ctx->command_queue);
     av_frame_free(&output);
     return err;
 }

 static int program_opencl_request_frame(AVFilterLink *outlink)
 {
     AVFilterContext *avctx = outlink->src;

     return program_opencl_run(avctx);
 }

 static int program_opencl_filter(FFFrameSync *fs)
 {
     AVFilterContext    *avctx = fs->parent;
     ProgramOpenCLContext *ctx = avctx->priv;
     int err, i;

     for (i = 0; i < ctx->nb_inputs; i++) {
         err = ff_framesync_get_frame(&ctx->fs, i, &ctx->frames[i], 0);
         if (err < 0)
             return err;
     }

     return program_opencl_run(avctx);
 }

 static int program_opencl_activate(AVFilterContext *avctx)
 {
     ProgramOpenCLContext *ctx = avctx->priv;

     av_assert0(ctx->nb_inputs > 0);

     return ff_framesync_activate(&ctx->fs);
 }

 static int program_opencl_config_output(AVFilterLink *outlink)
 {
     AVFilterContext    *avctx = outlink->src;
     ProgramOpenCLContext *ctx = avctx->priv;
     int err;

     err = ff_opencl_filter_config_output(outlink);
     if (err < 0)
         return err;

     if (ctx->nb_inputs > 0) {
         FFFrameSyncIn *in;
         int i;

         err = ff_framesync_init(&ctx->fs, avctx, ctx->nb_inputs);
         if (err < 0)
             return err;

         ctx->fs.opaque = ctx;
         ctx->fs.on_event = &program_opencl_filter;

         in = ctx->fs.in;
         for (i = 0; i < ctx->nb_inputs; i++) {
             const AVFilterLink *inlink = avctx->inputs[i];

             in[i].time_base = inlink->time_base;
             in[i].sync      = 1;
             in[i].before    = EXT_STOP;
             in[i].after     = EXT_INFINITY;
         }

         err = ff_framesync_configure(&ctx->fs);
         if (err < 0)
             return err;

     } else {
         outlink->time_base = av_inv_q(ctx->source_rate);
     }

     return 0;
 }

 static av_cold int program_opencl_init(AVFilterContext *avctx)
 {
     ProgramOpenCLContext *ctx = avctx->priv;
     int err;

     ff_opencl_filter_init(avctx);

     ctx->ocf.output_width  = ctx->width;
     ctx->ocf.output_height = ctx->height;

     if (!strcmp(avctx->filter->name, "openclsrc")) {
         if (!ctx->ocf.output_width || !ctx->ocf.output_height) {
             av_log(avctx, AV_LOG_ERROR, "OpenCL source requires output "
                    "dimensions to be specified.\n");
             return AVERROR(EINVAL);
         }

         ctx->nb_inputs = 0;
         ctx->ocf.output_format = ctx->source_format;
     } else {
         int i;

         ctx->frames = av_mallocz_array(ctx->nb_inputs,
                                        sizeof(*ctx->frames));
         if (!ctx->frames)
             return AVERROR(ENOMEM);

         for (i = 0; i < ctx->nb_inputs; i++) {
             AVFilterPad input;
             memset(&input, 0, sizeof(input));

             input.type = AVMEDIA_TYPE_VIDEO;
             input.name = av_asprintf("input%d", i);
             if (!input.name)
                 return AVERROR(ENOMEM);

             input.config_props = &ff_opencl_filter_config_input;

             err = ff_insert_inpad(avctx, i, &input);
             if (err < 0) {
                 av_freep(&input.name);
                 return err;
             }
         }
     }

     return 0;
 }

 static av_cold void program_opencl_uninit(AVFilterContext *avctx)
 {
     ProgramOpenCLContext *ctx = avctx->priv;
     cl_int cle;
     int i;

     if (ctx->nb_inputs > 0) {
         ff_framesync_uninit(&ctx->fs);

         av_freep(&ctx->frames);
         for (i = 0; i < avctx->nb_inputs; i++)
             av_freep(&avctx->input_pads[i].name);
     }

     if (ctx->kernel) {
         cle = clReleaseKernel(ctx->kernel);
         if (cle != CL_SUCCESS)
             av_log(avctx, AV_LOG_ERROR, "Failed to release "
                    "kernel: %d.\n", cle);
     }

     if (ctx->command_queue) {
         cle = clReleaseCommandQueue(ctx->command_queue);
         if (cle != CL_SUCCESS)
             av_log(avctx, AV_LOG_ERROR, "Failed to release "
                    "command queue: %d.\n", cle);
     }

     ff_opencl_filter_uninit(avctx);
 }

 #define OFFSET(x) offsetof(ProgramOpenCLContext, x)
 #define FLAGS (AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_FILTERING_PARAM)

 #if CONFIG_PROGRAM_OPENCL_FILTER

 static const AVOption program_opencl_options[] = {
     { "source", "OpenCL program source file", OFFSET(source_file),
       AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
     { "kernel", "Kernel name in program",     OFFSET(kernel_name),
       AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },

     { "inputs", "Number of inputs", OFFSET(nb_inputs),
       AV_OPT_TYPE_INT,              { .i64 = 1 }, 1, INT_MAX, FLAGS },

     { "size",   "Video size",       OFFSET(width),
       AV_OPT_TYPE_IMAGE_SIZE,       { .str = NULL }, 0, 0, FLAGS },
     { "s",      "Video size",       OFFSET(width),
       AV_OPT_TYPE_IMAGE_SIZE,       { .str = NULL }, 0, 0, FLAGS },

     { NULL },
 };

 FRAMESYNC_DEFINE_CLASS(program_opencl, ProgramOpenCLContext, fs);

 static const AVFilterPad program_opencl_outputs[] = {
     {
         .name         = "default",
         .type         = AVMEDIA_TYPE_VIDEO,
         .config_props = &program_opencl_config_output,
     },
     { NULL }
 };

 AVFilter ff_vf_program_opencl = {
     .name           = "program_opencl",
     .description    = NULL_IF_CONFIG_SMALL("Filter video using an OpenCL program"),
     .priv_size      = sizeof(ProgramOpenCLContext),
     .priv_class     = &program_opencl_class,
     .preinit        = &program_opencl_framesync_preinit,
     .init           = &program_opencl_init,
     .uninit         = &program_opencl_uninit,
     .query_formats  = &ff_opencl_filter_query_formats,
     .activate       = &program_opencl_activate,
     .inputs         = NULL,
     .outputs        = program_opencl_outputs,
     .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
 };

 #endif

 #if CONFIG_OPENCLSRC_FILTER

 static const AVOption openclsrc_options[] = {
     { "source", "OpenCL program source file", OFFSET(source_file),
       AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
     { "kernel", "Kernel name in program",     OFFSET(kernel_name),
       AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },

     { "size",   "Video size",       OFFSET(width),
       AV_OPT_TYPE_IMAGE_SIZE,       { .str = NULL }, 0, 0, FLAGS },
     { "s",      "Video size",       OFFSET(width),
       AV_OPT_TYPE_IMAGE_SIZE,       { .str = NULL }, 0, 0, FLAGS },

     { "format", "Video format",     OFFSET(source_format),
       AV_OPT_TYPE_PIXEL_FMT,        { .i64 = AV_PIX_FMT_NONE }, -1, INT_MAX, FLAGS },

     { "rate",   "Video frame rate", OFFSET(source_rate),
       AV_OPT_TYPE_VIDEO_RATE,       { .str = "25" }, 0, INT_MAX, FLAGS },
     { "r",      "Video frame rate", OFFSET(source_rate),
       AV_OPT_TYPE_VIDEO_RATE,       { .str = "25" }, 0, INT_MAX, FLAGS },

     { NULL },
 };

 AVFILTER_DEFINE_CLASS(openclsrc);

 static const AVFilterPad openclsrc_outputs[] = {
     {
         .name          = "default",
         .type          = AVMEDIA_TYPE_VIDEO,
         .config_props  = &program_opencl_config_output,
         .request_frame = &program_opencl_request_frame,
     },
     { NULL }
 };

 AVFilter ff_vsrc_openclsrc = {
     .name           = "openclsrc",
     .description    = NULL_IF_CONFIG_SMALL("Generate video using an OpenCL program"),
     .priv_size      = sizeof(ProgramOpenCLContext),
     .priv_class     = &openclsrc_class,
     .init           = &program_opencl_init,
     .uninit         = &program_opencl_uninit,
     .query_formats  = &ff_opencl_filter_query_formats,
     .inputs         = NULL,
     .outputs        = openclsrc_outputs,
     .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
 };

 #endif
	/*
	* 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 "libavutil/avstring.h"
	#include "libavutil/log.h"
	#include "libavutil/mem.h"
	#include "libavutil/opt.h"
	#include "libavutil/pixdesc.h"

	#include "avfilter.h"
	#include "framesync.h"
	#include "internal.h"
	#include "opencl.h"
	#include "video.h"

	typedef struct ProgramOpenCLContext {
	OpenCLFilterContext ocf;

	int loaded;
	cl_uint index;
	cl_kernel kernel;
	cl_command_queue command_queue;

	FFFrameSync fs;
	AVFrame **frames;

	const char *source_file;
	const char *kernel_name;
	int nb_inputs;
	int width, height;
	enum AVPixelFormat source_format;
	AVRational source_rate;
	} ProgramOpenCLContext;

	static int program_opencl_load(AVFilterContext *avctx)
	{
	ProgramOpenCLContext *ctx = avctx->priv;
	cl_int cle;
	int err;

	err = ff_opencl_filter_load_program_from_file(avctx, ctx->source_file);
	if (err < 0)
	return err;

	ctx->command_queue = clCreateCommandQueue(ctx->ocf.hwctx->context,
	ctx->ocf.hwctx->device_id,
	0, &cle);
	if (!ctx->command_queue) {
	av_log(avctx, AV_LOG_ERROR, "Failed to create OpenCL "
	"command queue: %d.\n", cle);
	return AVERROR(EIO);
	}

	ctx->kernel = clCreateKernel(ctx->ocf.program, ctx->kernel_name, &cle);
	if (!ctx->kernel) {
	if (cle == CL_INVALID_KERNEL_NAME) {
	av_log(avctx, AV_LOG_ERROR, "Kernel function '%s' not found in "
	"program.\n", ctx->kernel_name);
	} else {
	av_log(avctx, AV_LOG_ERROR, "Failed to create kernel: %d.\n", cle);
	}
	return AVERROR(EIO);
	}

	ctx->loaded = 1;
	return 0;
	}

	static int program_opencl_run(AVFilterContext *avctx)
	{
	AVFilterLink *outlink = avctx->outputs[0];
	ProgramOpenCLContext *ctx = avctx->priv;
	AVFrame *output = NULL;
	cl_int cle;
	size_t global_work[2];
	cl_mem src, dst;
	int err, input, plane;

	if (!ctx->loaded) {
	err = program_opencl_load(avctx);
	if (err < 0)
	return err;
	}

	output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
	if (!output) {
	err = AVERROR(ENOMEM);
	goto fail;
	}

	for (plane = 0; plane < FF_ARRAY_ELEMS(output->data); plane++) {
	dst = (cl_mem)output->data[plane];
	if (!dst)
	break;

	cle = clSetKernelArg(ctx->kernel, 0, sizeof(cl_mem), &dst);
	if (cle != CL_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
	"destination image argument: %d.\n", cle);
	err = AVERROR_UNKNOWN;
	goto fail;
	}
	cle = clSetKernelArg(ctx->kernel, 1, sizeof(cl_uint), &ctx->index);
	if (cle != CL_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
	"index argument: %d.\n", cle);
	err = AVERROR_UNKNOWN;
	goto fail;
	}

	for (input = 0; input < ctx->nb_inputs; input++) {
	av_assert0(ctx->frames[input]);

	src = (cl_mem)ctx->frames[input]->data[plane];
	av_assert0(src);

	cle = clSetKernelArg(ctx->kernel, 2 + input, sizeof(cl_mem), &src);
	if (cle != CL_SUCCESS) {
	av_log(avctx, AV_LOG_ERROR, "Failed to set kernel "
	"source image argument %d: %d.\n", input, cle);
	err = AVERROR_UNKNOWN;
	goto fail;
	}
	}

	err = ff_opencl_filter_work_size_from_image(avctx, global_work,
	output, plane, 0);
	if (err < 0)
	goto fail;

	av_log(avctx, AV_LOG_DEBUG, "Run kernel on plane %d "
	"(%zux%zu).\n", plane, global_work[0], global_work[1]);

	cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->kernel, 2, NULL,
	global_work, NULL, 0, NULL, NULL);
	CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue kernel: %d.\n", cle);
	}

	cle = clFinish(ctx->command_queue);
	CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle);

	if (ctx->nb_inputs > 0) {
	err = av_frame_copy_props(output, ctx->frames[0]);
	if (err < 0)
	goto fail;
	} else {
	output->pts = ctx->index;
	}
	++ctx->index;

	av_log(ctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
	av_get_pix_fmt_name(output->format),
	output->width, output->height, output->pts);

	return ff_filter_frame(outlink, output);

	fail:
	clFinish(ctx->command_queue);
	av_frame_free(&output);
	return err;
	}

	static int program_opencl_request_frame(AVFilterLink *outlink)
	{
	AVFilterContext *avctx = outlink->src;

	return program_opencl_run(avctx);
	}

	static int program_opencl_filter(FFFrameSync *fs)
	{
	AVFilterContext *avctx = fs->parent;
	ProgramOpenCLContext *ctx = avctx->priv;
	int err, i;

	for (i = 0; i < ctx->nb_inputs; i++) {
	err = ff_framesync_get_frame(&ctx->fs, i, &ctx->frames[i], 0);
	if (err < 0)
	return err;
	}

	return program_opencl_run(avctx);
	}

	static int program_opencl_activate(AVFilterContext *avctx)
	{
	ProgramOpenCLContext *ctx = avctx->priv;

	av_assert0(ctx->nb_inputs > 0);

	return ff_framesync_activate(&ctx->fs);
	}

	static int program_opencl_config_output(AVFilterLink *outlink)
	{
	AVFilterContext *avctx = outlink->src;
	ProgramOpenCLContext *ctx = avctx->priv;
	int err;

	err = ff_opencl_filter_config_output(outlink);
	if (err < 0)
	return err;

	if (ctx->nb_inputs > 0) {
	FFFrameSyncIn *in;
	int i;

	err = ff_framesync_init(&ctx->fs, avctx, ctx->nb_inputs);
	if (err < 0)
	return err;

	ctx->fs.opaque = ctx;
	ctx->fs.on_event = &program_opencl_filter;

	in = ctx->fs.in;
	for (i = 0; i < ctx->nb_inputs; i++) {
	const AVFilterLink *inlink = avctx->inputs[i];

	in[i].time_base = inlink->time_base;
	in[i].sync = 1;
	in[i].before = EXT_STOP;
	in[i].after = EXT_INFINITY;
	}

	err = ff_framesync_configure(&ctx->fs);
	if (err < 0)
	return err;

	} else {
	outlink->time_base = av_inv_q(ctx->source_rate);
	}

	return 0;
	}

	static av_cold int program_opencl_init(AVFilterContext *avctx)
	{
	ProgramOpenCLContext *ctx = avctx->priv;
	int err;

	ff_opencl_filter_init(avctx);

	ctx->ocf.output_width = ctx->width;
	ctx->ocf.output_height = ctx->height;

	if (!strcmp(avctx->filter->name, "openclsrc")) {
	if (!ctx->ocf.output_width \|\| !ctx->ocf.output_height) {
	av_log(avctx, AV_LOG_ERROR, "OpenCL source requires output "
	"dimensions to be specified.\n");
	return AVERROR(EINVAL);
	}

	ctx->nb_inputs = 0;
	ctx->ocf.output_format = ctx->source_format;
	} else {
	int i;

	ctx->frames = av_mallocz_array(ctx->nb_inputs,
	sizeof(*ctx->frames));
	if (!ctx->frames)
	return AVERROR(ENOMEM);

	for (i = 0; i < ctx->nb_inputs; i++) {
	AVFilterPad input;
	memset(&input, 0, sizeof(input));

	input.type = AVMEDIA_TYPE_VIDEO;
	input.name = av_asprintf("input%d", i);
	if (!input.name)
	return AVERROR(ENOMEM);

	input.config_props = &ff_opencl_filter_config_input;

	err = ff_insert_inpad(avctx, i, &input);
	if (err < 0) {
	av_freep(&input.name);
	return err;
	}
	}
	}

	return 0;
	}

	static av_cold void program_opencl_uninit(AVFilterContext *avctx)
	{
	ProgramOpenCLContext *ctx = avctx->priv;
	cl_int cle;
	int i;

	if (ctx->nb_inputs > 0) {
	ff_framesync_uninit(&ctx->fs);

	av_freep(&ctx->frames);
	for (i = 0; i < avctx->nb_inputs; i++)
	av_freep(&avctx->input_pads[i].name);
	}

	if (ctx->kernel) {
	cle = clReleaseKernel(ctx->kernel);
	if (cle != CL_SUCCESS)
	av_log(avctx, AV_LOG_ERROR, "Failed to release "
	"kernel: %d.\n", cle);
	}

	if (ctx->command_queue) {
	cle = clReleaseCommandQueue(ctx->command_queue);
	if (cle != CL_SUCCESS)
	av_log(avctx, AV_LOG_ERROR, "Failed to release "
	"command queue: %d.\n", cle);
	}

	ff_opencl_filter_uninit(avctx);
	}

	#define OFFSET(x) offsetof(ProgramOpenCLContext, x)
	#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM \| AV_OPT_FLAG_FILTERING_PARAM)

	#if CONFIG_PROGRAM_OPENCL_FILTER

	static const AVOption program_opencl_options[] = {
	{ "source", "OpenCL program source file", OFFSET(source_file),
	AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
	{ "kernel", "Kernel name in program", OFFSET(kernel_name),
	AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },

	{ "inputs", "Number of inputs", OFFSET(nb_inputs),
	AV_OPT_TYPE_INT, { .i64 = 1 }, 1, INT_MAX, FLAGS },

	{ "size", "Video size", OFFSET(width),
	AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, FLAGS },
	{ "s", "Video size", OFFSET(width),
	AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, FLAGS },

	{ NULL },
	};

	FRAMESYNC_DEFINE_CLASS(program_opencl, ProgramOpenCLContext, fs);

	static const AVFilterPad program_opencl_outputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.config_props = &program_opencl_config_output,
	},
	{ NULL }
	};

	AVFilter ff_vf_program_opencl = {
	.name = "program_opencl",
	.description = NULL_IF_CONFIG_SMALL("Filter video using an OpenCL program"),
	.priv_size = sizeof(ProgramOpenCLContext),
	.priv_class = &program_opencl_class,
	.preinit = &program_opencl_framesync_preinit,
	.init = &program_opencl_init,
	.uninit = &program_opencl_uninit,
	.query_formats = &ff_opencl_filter_query_formats,
	.activate = &program_opencl_activate,
	.inputs = NULL,
	.outputs = program_opencl_outputs,
	.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
	};

	#endif

	#if CONFIG_OPENCLSRC_FILTER

	static const AVOption openclsrc_options[] = {
	{ "source", "OpenCL program source file", OFFSET(source_file),
	AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },
	{ "kernel", "Kernel name in program", OFFSET(kernel_name),
	AV_OPT_TYPE_STRING, { .str = NULL }, .flags = FLAGS },

	{ "size", "Video size", OFFSET(width),
	AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, FLAGS },
	{ "s", "Video size", OFFSET(width),
	AV_OPT_TYPE_IMAGE_SIZE, { .str = NULL }, 0, 0, FLAGS },

	{ "format", "Video format", OFFSET(source_format),
	AV_OPT_TYPE_PIXEL_FMT, { .i64 = AV_PIX_FMT_NONE }, -1, INT_MAX, FLAGS },

	{ "rate", "Video frame rate", OFFSET(source_rate),
	AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, 0, INT_MAX, FLAGS },
	{ "r", "Video frame rate", OFFSET(source_rate),
	AV_OPT_TYPE_VIDEO_RATE, { .str = "25" }, 0, INT_MAX, FLAGS },

	{ NULL },
	};

	AVFILTER_DEFINE_CLASS(openclsrc);

	static const AVFilterPad openclsrc_outputs[] = {
	{
	.name = "default",
	.type = AVMEDIA_TYPE_VIDEO,
	.config_props = &program_opencl_config_output,
	.request_frame = &program_opencl_request_frame,
	},
	{ NULL }
	};

	AVFilter ff_vsrc_openclsrc = {
	.name = "openclsrc",
	.description = NULL_IF_CONFIG_SMALL("Generate video using an OpenCL program"),
	.priv_size = sizeof(ProgramOpenCLContext),
	.priv_class = &openclsrc_class,
	.init = &program_opencl_init,
	.uninit = &program_opencl_uninit,
	.query_formats = &ff_opencl_filter_query_formats,
	.inputs = NULL,
	.outputs = openclsrc_outputs,
	.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
	};

	#endif