Input and output formats must be the same, the overlay format must be
the same as the input except possibly with an additional alpha component.
---
configure | 1 +
libavfilter/Makefile | 2 +
libavfilter/allfilters.c | 1 +
libavfilter/opencl/overlay.cl | 104 ++++++++++++
libavfilter/opencl_source.h | 2 +
libavfilter/vf_overlay_opencl.c | 347 ++++++++++++++++++++++++++++++++++++++++
6 files changed, 457 insertions(+)
create mode 100644 libavfilter/opencl/overlay.cl
create mode 100644 libavfilter/vf_overlay_opencl.c
diff --git a/configure b/configure
index 895ae2ec38..c036a53a69 100755
--- a/configure
+++ b/configure
@@ -3178,6 +3178,7 @@ negate_filter_deps="lut_filter"
nnedi_filter_deps="gpl"
ocr_filter_deps="libtesseract"
ocv_filter_deps="libopencv"
+overlay_opencl_filter_deps="opencl"
owdenoise_filter_deps="gpl"
pan_filter_deps="swresample"
perspective_filter_deps="gpl"
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index cb3a1424d9..cc9d4021b8 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -249,6 +249,8 @@ OBJS-$(CONFIG_OCV_FILTER) +=
vf_libopencv.o
OBJS-$(CONFIG_OPENCL) += deshake_opencl.o
unsharp_opencl.o
OBJS-$(CONFIG_OSCILLOSCOPE_FILTER) += vf_datascope.o
OBJS-$(CONFIG_OVERLAY_FILTER) += vf_overlay.o framesync2.o
+OBJS-$(CONFIG_OVERLAY_OPENCL_FILTER) += vf_overlay_opencl.o opencl.o \
+ opencl/overlay.o
OBJS-$(CONFIG_OWDENOISE_FILTER) += vf_owdenoise.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
OBJS-$(CONFIG_PALETTEGEN_FILTER) += vf_palettegen.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 154ddf706d..261dd3a8e1 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -260,6 +260,7 @@ static void register_all(void)
REGISTER_FILTER(OCV, ocv, vf);
REGISTER_FILTER(OSCILLOSCOPE, oscilloscope, vf);
REGISTER_FILTER(OVERLAY, overlay, vf);
+ REGISTER_FILTER(OVERLAY_OPENCL, overlay_opencl, vf);
REGISTER_FILTER(OWDENOISE, owdenoise, vf);
REGISTER_FILTER(PAD, pad, vf);
REGISTER_FILTER(PALETTEGEN, palettegen, vf);
diff --git a/libavfilter/opencl/overlay.cl b/libavfilter/opencl/overlay.cl
new file mode 100644
index 0000000000..6cac5e28c4
--- /dev/null
+++ b/libavfilter/opencl/overlay.cl
@@ -0,0 +1,104 @@
+/*
+ * 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
+ */
+
+__kernel void overlay_no_alpha(__write_only image2d_t dst,
+ __read_only image2d_t main,
+ __read_only image2d_t overlay,
+ int x_position,
+ int y_position)
+{
+ const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_FILTER_NEAREST);
+
+ int2 overlay_size = get_image_dim(overlay);
+ int2 loc = (int2)(get_global_id(0), get_global_id(1));
+
+ if (loc.x < x_position ||
+ loc.y < y_position ||
+ loc.x >= overlay_size.x + x_position ||
+ loc.y >= overlay_size.y + y_position) {
+ float4 val = read_imagef(main, sampler, loc);
+ write_imagef(dst, loc, val);
+ } else {
+ int2 loc_overlay = (int2)(x_position, y_position);
+ float4 val = read_imagef(overlay, sampler, loc - loc_overlay);
+ write_imagef(dst, loc, val);
+ }
+}
+
+__kernel void overlay_internal_alpha(__write_only image2d_t dst,
+ __read_only image2d_t main,
+ __read_only image2d_t overlay,
+ int x_position,
+ int y_position)
+{
+ const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_FILTER_NEAREST);
+
+ int2 overlay_size = get_image_dim(overlay);
+ int2 loc = (int2)(get_global_id(0), get_global_id(1));
+
+ if (loc.x < x_position ||
+ loc.y < y_position ||
+ loc.x >= overlay_size.x + x_position ||
+ loc.y >= overlay_size.y + y_position) {
+ float4 val = read_imagef(main, sampler, loc);
+ write_imagef(dst, loc, val);
+ } else {
+ int2 loc_overlay = (int2)(x_position, y_position);
+ float4 in_main = read_imagef(main, sampler, loc);
+ float4 in_overlay = read_imagef(overlay, sampler, loc - loc_overlay);
+ float4 val = in_overlay * in_overlay.w + in_main * (1.0f -
in_overlay.w);
+ write_imagef(dst, loc, val);
+ }
+}
+
+__kernel void overlay_external_alpha(__write_only image2d_t dst,
+ __read_only image2d_t main,
+ __read_only image2d_t overlay,
+ __read_only image2d_t alpha,
+ int x_position,
+ int y_position,
+ int alpha_subsample_x,
+ int alpha_subsample_y)
+{
+ const sampler_t sampler = (CLK_NORMALIZED_COORDS_FALSE |
+ CLK_FILTER_NEAREST);
+
+ int2 overlay_size = get_image_dim(overlay);
+ int2 loc = (int2)(get_global_id(0), get_global_id(1));
+
+ if (loc.x < x_position ||
+ loc.y < y_position ||
+ loc.x >= overlay_size.x + x_position ||
+ loc.y >= overlay_size.y + y_position) {
+ float4 val = read_imagef(main, sampler, loc);
+ write_imagef(dst, loc, val);
+ } else {
+ int2 loc_overlay = (int2)(x_position, y_position);
+ float4 in_main = read_imagef(main, sampler, loc);
+ float4 in_overlay = read_imagef(overlay, sampler, loc - loc_overlay);
+
+ int2 loc_alpha = (int2)(loc.x * alpha_subsample_x,
+ loc.y * alpha_subsample_y) - loc_overlay;
+ float4 in_alpha = read_imagef(alpha, sampler, loc_alpha);
+
+ float4 val = in_overlay * in_alpha.x + in_main * (1.0f - in_alpha.x);
+ write_imagef(dst, loc, val);
+ }
+}
diff --git a/libavfilter/opencl_source.h b/libavfilter/opencl_source.h
index 8674a03a94..e7af58bcfa 100644
--- a/libavfilter/opencl_source.h
+++ b/libavfilter/opencl_source.h
@@ -19,4 +19,6 @@
#ifndef AVFILTER_OPENCL_SOURCE_H
#define AVFILTER_OPENCL_SOURCE_H
+extern const char *ff_opencl_source_overlay;
+
#endif /* AVFILTER_OPENCL_SOURCE_H */
diff --git a/libavfilter/vf_overlay_opencl.c b/libavfilter/vf_overlay_opencl.c
new file mode 100644
index 0000000000..4da244dd43
--- /dev/null
+++ b/libavfilter/vf_overlay_opencl.c
@@ -0,0 +1,347 @@
+/*
+ * 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/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 "framesync2.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;
+
+ FFFrameSync fs;
+
+ int nb_planes;
+ int alpha_separate;
+ int alpha_subsample_x;
+ int alpha_subsample_y;
+
+ int x_position;
+ int y_position;
+} OverlayOpenCLContext;
+
+static int overlay_opencl_load(AVFilterContext *avctx,
+ enum AVPixelFormat main_format,
+ enum AVPixelFormat overlay_format)
+{
+ OverlayOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+ const char *source = ff_opencl_source_overlay;
+ const char *kernel;
+ const AVPixFmtDescriptor *main_desc, *overlay_desc;
+ int err, i, main_planes, overlay_planes;
+
+ main_desc = av_pix_fmt_desc_get(main_format);
+ overlay_desc = av_pix_fmt_desc_get(overlay_format);
+
+ main_planes = overlay_planes = 0;
+ for (i = 0; i < main_desc->nb_components; i++)
+ main_planes = FFMAX(main_planes, main_desc->comp[i].plane + 1);
+ for (i = 0; i < overlay_desc->nb_components; i++)
+ overlay_planes = FFMAX(overlay_planes, overlay_desc->comp[i].plane +
1);
+
+ ctx->nb_planes = main_planes;
+ if (main_planes == overlay_planes) {
+ if (main_desc->nb_components == overlay_desc->nb_components)
+ kernel = "overlay_no_alpha";
+ else
+ kernel = "overlay_internal_alpha";
+ ctx->alpha_separate = 0;
+ } else {
+ kernel = "overlay_external_alpha";
+ ctx->alpha_separate = 1;
+ ctx->alpha_subsample_x = 1 << main_desc->log2_chroma_w;
+ ctx->alpha_subsample_y = 1 << main_desc->log2_chroma_h;
+ }
+ av_log(avctx, AV_LOG_DEBUG, "Using kernel %s.\n", kernel);
+
+ err = ff_opencl_filter_load_program(avctx, &source, 1);
+ 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, kernel, &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_blend(FFFrameSync *fs)
+{
+ AVFilterContext *avctx = fs->parent;
+ AVFilterLink *outlink = avctx->outputs[0];
+ OverlayOpenCLContext *ctx = avctx->priv;
+ AVFrame *input_main, *input_overlay;
+ AVFrame *output;
+ cl_mem mem;
+ cl_int cle, x, y;
+ size_t global_work[2];
+ int kernel_arg = 0;
+ int err, plane;
+
+ err = ff_framesync2_get_frame(fs, 0, &input_main, 0);
+ if (err < 0)
+ return err;
+ err = ff_framesync2_get_frame(fs, 1, &input_overlay, 0);
+ if (err < 0)
+ return err;
+
+ if (!ctx->initialised) {
+ AVHWFramesContext *main_fc =
+ (AVHWFramesContext*)input_main->hw_frames_ctx->data;
+ AVHWFramesContext *overlay_fc =
+ (AVHWFramesContext*)input_overlay->hw_frames_ctx->data;
+
+ err = overlay_opencl_load(avctx, main_fc->sw_format,
+ overlay_fc->sw_format);
+ 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 < ctx->nb_planes; plane++) {
+ kernel_arg = 0;
+
+ mem = (cl_mem)output->data[plane];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS)
+ goto fail_kernel_arg;
+
+ mem = (cl_mem)input_main->data[plane];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS)
+ goto fail_kernel_arg;
+
+ mem = (cl_mem)input_overlay->data[plane];
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_mem), &mem);
+ if (cle != CL_SUCCESS)
+ goto fail_kernel_arg;
+
+ if (ctx->alpha_separate) {
+ mem = (cl_mem)input_overlay->data[ctx->nb_planes];
+ 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;
+
+ if (ctx->alpha_separate) {
+ cl_int alpha_subsample_x = plane > 0 ? ctx->alpha_subsample_x : 1;
+ cl_int alpha_subsample_y = plane > 0 ? ctx->alpha_subsample_y : 1;
+
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_int),
&alpha_subsample_x);
+ if (cle != CL_SUCCESS)
+ goto fail_kernel_arg;
+ cle = clSetKernelArg(ctx->kernel, kernel_arg++, sizeof(cl_int),
&alpha_subsample_y);
+ if (cle != CL_SUCCESS)
+ goto fail_kernel_arg;
+ }
+
+ global_work[0] = output->width;
+ global_work[1] = output->height;
+
+ 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 for plane %d: %d.\n", cle, plane);
+ 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, input_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 int overlay_opencl_config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *avctx = outlink->src;
+ OverlayOpenCLContext *ctx = avctx->priv;
+ int err;
+
+ err = ff_opencl_filter_config_output(outlink);
+ if (err < 0)
+ return err;
+
+ err = ff_framesync2_init_dualinput(&ctx->fs, avctx);
+ if (err < 0)
+ return err;
+
+ return ff_framesync2_configure(&ctx->fs);
+}
+
+static av_cold int overlay_opencl_init(AVFilterContext *avctx)
+{
+ OverlayOpenCLContext *ctx = avctx->priv;
+
+ ctx->fs.on_event = &overlay_opencl_blend;
+
+ return ff_opencl_filter_init(avctx);
+}
+
+static int overlay_opencl_activate(AVFilterContext *avctx)
+{
+ OverlayOpenCLContext *ctx = avctx->priv;
+
+ return ff_framesync2_activate(&ctx->fs);
+}
+
+static av_cold void overlay_opencl_uninit(AVFilterContext *avctx)
+{
+ OverlayOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+
+ 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);
+
+ ff_framesync2_uninit(&ctx->fs);
+}
+
+#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 },
+};
+
+AVFILTER_DEFINE_CLASS(overlay_opencl);
+
+static const AVFilterPad overlay_opencl_inputs[] = {
+ {
+ .name = "main",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &ff_opencl_filter_config_input,
+ },
+ {
+ .name = "overlay",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &ff_opencl_filter_config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad overlay_opencl_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &overlay_opencl_config_output,
+ },
+ { 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 = &overlay_opencl_init,
+ .uninit = &overlay_opencl_uninit,
+ .query_formats = &ff_opencl_filter_query_formats,
+ .activate = &overlay_opencl_activate,
+ .inputs = overlay_opencl_inputs,
+ .outputs = overlay_opencl_outputs,
+ .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
+};
--
2.11.0
_______________________________________________
ffmpeg-devel mailing list
ffmpeg-devel@ffmpeg.org
http://ffmpeg.org/mailman/listinfo/ffmpeg-devel
