[FFmpeg-devel] [PATCH 2/2] lavfi: Add filters to run arbitrary OpenCL programs
Mark Thompson
sw at jkqxz.net
Wed Jan 3 01:17:32 EET 2018
---
E.g. with Beignet + i965:
./ffmpeg_g -y -init_hw_device vaapi=va:/dev/dri/renderD129 -init_hw_device opencl=ocl at va -hwaccel vaapi -hwaccel_output_format vaapi -i in.mp4 -an -filter_hw_device ocl -filter_complex '[0:v]hwmap[i1]; openclsrc=source=test.cl:kernel=ramp:w=1920:h=1080:format=nv12:rate=30[i2]; [i1][i2]program_opencl=inputs=2:source=test.cl:kernel=blend_images,hwmap=reverse=1:derive_device=vaapi' -c:v h264_vaapi -b:v 5M out.mp4
with test.cl:
"""
__kernel void blend_images(__write_only image2d_t dst,
unsigned int index,
__read_only image2d_t src1,
__read_only image2d_t src2)
{
const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
CLK_FILTER_NEAREST);
float blend = (cos((float)index / 50) + 1.0f) / 2.0f;
int2 dst_loc = (int2)(get_global_id(0), get_global_id(1));
int2 src1_loc = dst_loc * get_image_dim(src1) / get_image_dim(dst);
int2 src2_loc = dst_loc * get_image_dim(src2) / get_image_dim(dst);
float4 val1 = read_imagef(src1, sampler, src1_loc);
float4 val2 = read_imagef(src2, sampler, src2_loc);
write_imagef(dst, dst_loc, val1 * blend + val2 * (1.0f - blend));
}
__kernel void ramp(__write_only image2d_t dst,
unsigned int index)
{
int2 loc = (int2)(get_global_id(0), get_global_id(1));
float4 val;
val.xy = convert_float2(loc) / convert_float2(get_image_dim(dst));
write_imagef(dst, loc, val);
}
"""
configure | 1 +
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 2 +
libavfilter/vf_program_opencl.c | 443 ++++++++++++++++++++++++++++++++++++++++
4 files changed, 448 insertions(+)
create mode 100644 libavfilter/vf_program_opencl.c
diff --git a/configure b/configure
index 606cdd0004..f58a7b999c 100755
--- a/configure
+++ b/configure
@@ -3249,6 +3249,7 @@ perspective_filter_deps="gpl"
phase_filter_deps="gpl"
pp7_filter_deps="gpl"
pp_filter_deps="gpl postproc"
+program_opencl_filter_deps="opencl"
pullup_filter_deps="gpl"
removelogo_filter_deps="avcodec avformat swscale"
repeatfields_filter_deps="gpl"
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 8bde542163..02f808e08c 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -272,6 +272,7 @@ OBJS-$(CONFIG_PP_FILTER) += vf_pp.o
OBJS-$(CONFIG_PP7_FILTER) += vf_pp7.o
OBJS-$(CONFIG_PREMULTIPLY_FILTER) += vf_premultiply.o framesync.o
OBJS-$(CONFIG_PREWITT_FILTER) += vf_convolution.o
+OBJS-$(CONFIG_PROGRAM_OPENCL_FILTER) += vf_program_opencl.o opencl.o
OBJS-$(CONFIG_PSEUDOCOLOR_FILTER) += vf_pseudocolor.o
OBJS-$(CONFIG_PSNR_FILTER) += vf_psnr.o framesync.o
OBJS-$(CONFIG_PULLUP_FILTER) += vf_pullup.o
@@ -367,6 +368,7 @@ OBJS-$(CONFIG_LIFE_FILTER) += vsrc_life.o
OBJS-$(CONFIG_MANDELBROT_FILTER) += vsrc_mandelbrot.o
OBJS-$(CONFIG_MPTESTSRC_FILTER) += vsrc_mptestsrc.o
OBJS-$(CONFIG_NULLSRC_FILTER) += vsrc_testsrc.o
+OBJS-$(CONFIG_OPENCLSRC_FILTER) += vf_program_opencl.o opencl.o
OBJS-$(CONFIG_RGBTESTSRC_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_SMPTEBARS_FILTER) += vsrc_testsrc.o
OBJS-$(CONFIG_SMPTEHDBARS_FILTER) += vsrc_testsrc.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 67c073091f..ff76f2c747 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -281,6 +281,7 @@ static void register_all(void)
REGISTER_FILTER(PP7, pp7, vf);
REGISTER_FILTER(PREMULTIPLY, premultiply, vf);
REGISTER_FILTER(PREWITT, prewitt, vf);
+ REGISTER_FILTER(PROGRAM_OPENCL, program_opencl, vf);
REGISTER_FILTER(PSEUDOCOLOR, pseudocolor, vf);
REGISTER_FILTER(PSNR, psnr, vf);
REGISTER_FILTER(PULLUP, pullup, vf);
@@ -375,6 +376,7 @@ static void register_all(void)
REGISTER_FILTER(MANDELBROT, mandelbrot, vsrc);
REGISTER_FILTER(MPTESTSRC, mptestsrc, vsrc);
REGISTER_FILTER(NULLSRC, nullsrc, vsrc);
+ REGISTER_FILTER(OPENCLSRC, openclsrc, vsrc);
REGISTER_FILTER(RGBTESTSRC, rgbtestsrc, vsrc);
REGISTER_FILTER(SMPTEBARS, smptebars, vsrc);
REGISTER_FILTER(SMPTEHDBARS, smptehdbars, vsrc);
diff --git a/libavfilter/vf_program_opencl.c b/libavfilter/vf_program_opencl.c
new file mode 100644
index 0000000000..4de0ffd268
--- /dev/null
+++ b/libavfilter/vf_program_opencl.c
@@ -0,0 +1,443 @@
+/*
+ * 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/buffer.h"
+#include "libavutil/common.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_opencl.h"
+#include "libavutil/log.h"
+#include "libavutil/mem.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.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;
+ 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)
+ goto fail;
+
+ 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);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+
+ ctx->kernel = clCreateKernel(ctx->ocf.program, ctx->kernel_name, &cle);
+ if (!ctx->kernel) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to create kernel: %d.\n", cle);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+
+ ctx->loaded = 1;
+ return 0;
+
+fail:
+ if (ctx->command_queue)
+ clReleaseCommandQueue(ctx->command_queue);
+ if (ctx->kernel)
+ clReleaseKernel(ctx->kernel);
+ return err;
+}
+
+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)
+ goto fail;
+ }
+
+ 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);
+ 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);
+ 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);
+ goto fail;
+ }
+ }
+
+ cle = clGetImageInfo(dst, CL_IMAGE_WIDTH, sizeof(size_t),
+ &global_work[0], NULL);
+ cle = clGetImageInfo(dst, CL_IMAGE_HEIGHT, sizeof(size_t),
+ &global_work[1], NULL);
+
+ 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);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to enqueue kernel: %d.\n",
+ cle);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+ }
+
+ cle = clFinish(ctx->command_queue);
+ if (cle != CL_SUCCESS) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to finish command queue: %d.\n",
+ cle);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+
+ 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);
+
+ 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 },
+ { "w", "Output video width",
+ OFFSET(ocf.output_width), AV_OPT_TYPE_INT,
+ { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
+ { "h", "Output video height",
+ OFFSET(ocf.output_height), AV_OPT_TYPE_INT,
+ { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
+ { "inputs", "Number of inputs",
+ OFFSET(nb_inputs), AV_OPT_TYPE_INT,
+ { .i64 = 1 }, 1, INT_MAX, .flags = 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 },
+ { "w", "Output video width",
+ OFFSET(ocf.output_width), AV_OPT_TYPE_INT,
+ { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
+ { "h", "Output video height",
+ OFFSET(ocf.output_height), AV_OPT_TYPE_INT,
+ { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
+ { "format", "Output video format",
+ OFFSET(source_format), AV_OPT_TYPE_PIXEL_FMT,
+ { .i64 = AV_PIX_FMT_NONE }, -1, INT_MAX, .flags = FLAGS },
+ { "rate", "Output video frame rate",
+ OFFSET(source_rate), AV_OPT_TYPE_VIDEO_RATE,
+ { .str = "30" }, 0, INT_MAX, .flags = 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
--
2.11.0
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