Currently works only with RGBA on top of NV12.
---
configure | 1 +
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 1 +
libavfilter/opencl/overlay.cl | 73 +++++++++
libavfilter/opencl_source.h | 1 +
libavfilter/vf_overlay_opencl.c | 326 ++++++++++++++++++++++++++++++++++++++++
6 files changed, 404 insertions(+)
create mode 100644 libavfilter/opencl/overlay.cl
create mode 100644 libavfilter/vf_overlay_opencl.c
diff --git a/configure b/configure
index 95f066a85..079217c5e 100755
--- a/configure
+++ b/configure
@@ -2524,6 +2524,7 @@ hqdn3d_filter_deps="gpl"
interlace_filter_deps="gpl"
movie_filter_deps="avcodec avformat"
ocv_filter_deps="libopencv"
+overlay_opencl_filter_deps="opencl"
program_opencl_filter_deps="opencl"
resample_filter_deps="avresample"
scale_filter_deps="swscale"
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index f2f829d63..c5c994941 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -75,6 +75,8 @@ OBJS-$(CONFIG_NOFORMAT_FILTER) += vf_format.o
OBJS-$(CONFIG_NULL_FILTER) += vf_null.o
OBJS-$(CONFIG_OCV_FILTER) += vf_libopencv.o
OBJS-$(CONFIG_OVERLAY_FILTER) += vf_overlay.o
+OBJS-$(CONFIG_OVERLAY_OPENCL_FILTER) += vf_overlay_opencl.o opencl.o \
+ opencl/overlay.o
opencl/rgbyuv.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
OBJS-$(CONFIG_PIXDESCTEST_FILTER) += vf_pixdesctest.o
OBJS-$(CONFIG_PROGRAM_OPENCL_FILTER) += vf_program_opencl.o opencl.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 2ac2cc48c..fe69035e2 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -98,6 +98,7 @@ void avfilter_register_all(void)
REGISTER_FILTER(NULL, null, vf);
REGISTER_FILTER(OCV, ocv, vf);
REGISTER_FILTER(OVERLAY, overlay, vf);
+ REGISTER_FILTER(OVERLAY_OPENCL, overlay_opencl, vf);
REGISTER_FILTER(PAD, pad, vf);
REGISTER_FILTER(PIXDESCTEST, pixdesctest, vf);
REGISTER_FILTER(PROGRAM_OPENCL, program_opencl, vf);
diff --git a/libavfilter/opencl/overlay.cl b/libavfilter/opencl/overlay.cl
new file mode 100644
index 000000000..0667767c5
--- /dev/null
+++ b/libavfilter/opencl/overlay.cl
@@ -0,0 +1,73 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+__kernel void overlay_nv12_rgba(__write_only image2d_t dst_y,
+ __write_only image2d_t dst_uv,
+ __read_only image2d_t src_y,
+ __read_only image2d_t src_uv,
+ __read_only image2d_t overlay_rgba,
+ int x_position,
+ int y_position)
+{
+ const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_FILTER_NEAREST);
+ int i;
+
+ int2 overlay_size = get_image_dim(overlay_rgba);
+
+ int2 loc_y[4];
+ int2 loc_uv = (int2)(get_global_id(0), get_global_id(1));
+ int2 loc_overlay = (int2)(x_position, y_position);
+ float4 in_y[4];
+ float4 in_uv;
+ for (i = 0; i < 4; i++) {
+ loc_y[i] = 2 * loc_uv + (int2)(i & 1, !!(i & 2));
+ in_y[i] = read_imagef(src_y, sampler, loc_y[i]);
+ }
+ in_uv = read_imagef(src_uv, sampler, loc_uv);
+
+ if (loc_y[0].x < x_position ||
+ loc_y[0].y < y_position ||
+ loc_y[3].x >= overlay_size.x + x_position ||
+ loc_y[3].y >= overlay_size.y + y_position) {
+ for (i = 0; i < 4; i++)
+ write_imagef(dst_y, loc_y[i], in_y[i]);
+ write_imagef(dst_uv, loc_uv, in_uv);
+ return;
+ }
+
+ float4 in_yuv[4];
+ float4 uval_rgb[4], oval_rgb[4];
+ float4 out_rgb[4], out_yuv[4];
+ float4 out_uv = 0.0f;
+ for (i = 0; i < 4; i++) {
+ in_yuv[i].x = in_y[i].x;
+ in_yuv[i].yz = in_uv.xy;
+
+ uval_rgb[i] = yuv_to_rgb_input(in_yuv[i]);
+ oval_rgb[i] = read_imagef(overlay_rgba, sampler, loc_y[i] -
loc_overlay);
+
+ out_rgb[i] = uval_rgb[i] * (1.0f - oval_rgb[i].w) +
+ oval_rgb[i] * oval_rgb[i].w;
+ out_yuv[i] = rgb_to_yuv_output(out_rgb[i]);
+
+ write_imagef(dst_y, loc_y[i], out_yuv[i].x);
+ out_uv.xy += out_yuv[i].yz;
+ }
+ write_imagef(dst_uv, loc_uv, 0.25f * out_uv);
+}
diff --git a/libavfilter/opencl_source.h b/libavfilter/opencl_source.h
index d66c0b182..c117d05e5 100644
--- a/libavfilter/opencl_source.h
+++ b/libavfilter/opencl_source.h
@@ -19,6 +19,7 @@
#ifndef AVFILTER_OPENCL_SOURCE_H
#define AVFILTER_OPENCL_SOURCE_H
+extern const char *ff_opencl_source_overlay;
extern const char *ff_opencl_source_rgbyuv;
#endif /* AVFILTER_OPENCL_SOURCE_H */
diff --git a/libavfilter/vf_overlay_opencl.c b/libavfilter/vf_overlay_opencl.c
new file mode 100644
index 000000000..21a0cc4e3
--- /dev/null
+++ b/libavfilter/vf_overlay_opencl.c
@@ -0,0 +1,326 @@
+/*
+ * This file is part of Libav.
+ *
+ * Libav 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.
+ *
+ * Libav 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 Libav; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include "libavutil/avassert.h"
+#include "libavutil/buffer.h"
+#include "libavutil/common.h"
+#include "libavutil/hwcontext.h"
+#include "libavutil/hwcontext_opencl.h"
+#include "libavutil/log.h"
+#include "libavutil/mathematics.h"
+#include "libavutil/mem.h"
+#include "libavutil/pixdesc.h"
+#include "libavutil/opt.h"
+
+#include "avfilter.h"
+#include "internal.h"
+#include "opencl.h"
+#include "opencl_source.h"
+#include "video.h"
+
+typedef struct OverlayOpenCLContext {
+ OpenCLFilterContext ocf;
+
+ int initialised;
+ cl_kernel kernel;
+ cl_command_queue command_queue;
+
+ AVFrame *main;
+ AVFrame *overlay;
+ AVFrame *overlay_next;
+
+ int x_position;
+ int y_position;
+} OverlayOpenCLContext;
+
+
+static int overlay_opencl_load(AVFilterContext *avctx,
+ enum AVColorSpace colorspace)
+{
+ OverlayOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+ const char *source[4];
+ int err;
+
+ source[0] = ff_opencl_source_rgbyuv;
+ source[1] = ff_opencl_make_rgbyuv("input", colorspace, 0);
+ source[2] = ff_opencl_make_rgbyuv("output", colorspace, 1);
+ source[3] = ff_opencl_source_overlay;
+
+ err = ff_opencl_filter_load_program(avctx, source, 4);
+
+ av_freep(&source[1]);
+ av_freep(&source[2]);
+
+ 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, "overlay_nv12_rgba", &cle);
+ if (!ctx->kernel) {
+ av_log(avctx, AV_LOG_ERROR, "Failed to create kernel: %d.\n", cle);
+ err = AVERROR(EIO);
+ goto fail;
+ }
+
+ ctx->initialised = 1;
+ return 0;
+
+fail:
+ if (ctx->command_queue)
+ clReleaseCommandQueue(ctx->command_queue);
+ if (ctx->kernel)
+ clReleaseKernel(ctx->kernel);
+ return err;
+}
+
+static int overlay_opencl_filter_main(AVFilterLink *inlink, AVFrame *input)
+{
+ AVFilterContext *avctx = inlink->dst;
+ OverlayOpenCLContext *ctx = avctx->priv;
+
+ av_log(avctx, AV_LOG_DEBUG, "Filter main: %s, %ux%u (%"PRId64").\n",
+ av_get_pix_fmt_name(input->format),
+ input->width, input->height, input->pts);
+
+ av_assert0(!ctx->main);
+ ctx->main = input;
+
+ return 0;
+}
+
+static int overlay_opencl_filter_overlay(AVFilterLink *inlink, AVFrame *input)
+{
+ AVFilterContext *avctx = inlink->dst;
+ OverlayOpenCLContext *ctx = avctx->priv;
+
+ av_log(avctx, AV_LOG_DEBUG, "Filter overlay: %s, %ux%u (%"PRId64").\n",
+ av_get_pix_fmt_name(input->format),
+ input->width, input->height, input->pts);
+
+ av_assert0(!ctx->overlay_next);
+ ctx->overlay_next = input;
+
+ return 0;
+}
+
+static int overlay_opencl_request_frame(AVFilterLink *outlink)
+{
+ AVFilterContext *avctx = outlink->src;
+ OverlayOpenCLContext *ctx = avctx->priv;
+ AVFrame *output;
+ cl_mem mem;
+ cl_int cle, x, y;
+ size_t global_work[2];
+ int kernel_arg = 0;
+ int err;
+
+ av_log(avctx, AV_LOG_DEBUG, "Filter request frame.\n");
+
+ if (!ctx->main) {
+ err = ff_request_frame(avctx->inputs[0]);
+ if (err < 0)
+ return err;
+ }
+ if (!ctx->main)
+ return AVERROR(EAGAIN);
+
+ if (!ctx->initialised) {
+ err = overlay_opencl_load(avctx, ctx->main->colorspace);
+ if (err < 0)
+ return err;
+ }
+
+ if (!ctx->overlay_next) {
+ err = ff_request_frame(avctx->inputs[1]);
+ if (err < 0)
+ return err;
+ }
+
+ while (!ctx->overlay ||
+ av_compare_ts(ctx->main->pts,
+ avctx->inputs[0]->time_base,
+ ctx->overlay_next->pts,
+ avctx->inputs[1]->time_base) > 0) {
+ av_frame_free(&ctx->overlay);
+ ctx->overlay = ctx->overlay_next;
+ ctx->overlay_next = NULL;
+
+ err = ff_request_frame(avctx->inputs[1]);
+ if (err < 0)
+ return err;
+ }
+
+ output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!output) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ mem = (cl_mem)output->data[0];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS) goto fail_kernel_arg;
+ mem = (cl_mem)output->data[1];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS) goto fail_kernel_arg;
+ mem = (cl_mem)ctx->main->data[0];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS) goto fail_kernel_arg;
+ mem = (cl_mem)ctx->main->data[1];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS) goto fail_kernel_arg;
+ mem = (cl_mem)ctx->overlay->data[0];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS) goto fail_kernel_arg;
+
+ x = ctx->x_position;
+ y = ctx->y_position;
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_int), &x);
+ if (cle != CL_SUCCESS) goto fail_kernel_arg;
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_int), &y);
+ if (cle != CL_SUCCESS) goto fail_kernel_arg;
+
+ // The kernel processes a 2x2 block.
+ global_work[0] = output->width / 2;
+ global_work[1] = output->height / 2;
+
+ 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 "
+ "overlay 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;
+ }
+
+ err = av_frame_copy_props(output, ctx->main);
+
+ av_frame_free(&ctx->main);
+
+ av_log(avctx, 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_kernel_arg:
+ av_log(avctx, AV_LOG_ERROR, "Failed to set kernel arg %d: %d.\n",
+ kernel_arg, cle);
+ err = AVERROR(EIO);
+fail:
+ return err;
+}
+
+static av_cold void overlay_opencl_uninit(AVFilterContext *avctx)
+{
+ OverlayOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+
+ av_frame_free(&ctx->main);
+ av_frame_free(&ctx->overlay);
+ av_frame_free(&ctx->overlay_next);
+
+ 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(OverlayOpenCLContext, x)
+#define FLAGS (AV_OPT_FLAG_VIDEO_PARAM)
+static const AVOption overlay_opencl_options[] = {
+ { "x", "Overlay x position",
+ OFFSET(x_position), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags =
FLAGS },
+ { "y", "Overlay y position",
+ OFFSET(y_position), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags =
FLAGS },
+ { NULL },
+};
+
+static const AVClass overlay_opencl_class = {
+ .class_name = "overlay_opencl",
+ .item_name = av_default_item_name,
+ .option = overlay_opencl_options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
+static const AVFilterPad overlay_opencl_inputs[] = {
+ {
+ .name = "main",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &ff_opencl_filter_config_input,
+ .filter_frame = &overlay_opencl_filter_main,
+ },
+ {
+ .name = "overlay",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &ff_opencl_filter_config_input,
+ .filter_frame = &overlay_opencl_filter_overlay,
+ .needs_fifo = 1,
+ },
+ { NULL }
+};
+
+static const AVFilterPad overlay_opencl_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &ff_opencl_filter_config_output,
+ .request_frame = &overlay_opencl_request_frame,
+ },
+ { NULL }
+};
+
+AVFilter ff_vf_overlay_opencl = {
+ .name = "overlay_opencl",
+ .description = NULL_IF_CONFIG_SMALL("Overlay one video on top of
another"),
+ .priv_size = sizeof(OverlayOpenCLContext),
+ .priv_class = &overlay_opencl_class,
+ .init = &ff_opencl_filter_init,
+ .uninit = &overlay_opencl_uninit,
+ .query_formats = &ff_opencl_filter_query_formats,
+ .inputs = overlay_opencl_inputs,
+ .outputs = overlay_opencl_outputs,
+ .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
--
2.11.0
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