[FFmpeg-devel] [PATCH] avfilter: add pad opencl filter
Paul B Mahol
onemda at gmail.com
Thu Feb 6 20:54:16 EET 2020
Signed-off-by: Paul B Mahol <onemda at gmail.com>
---
configure | 1 +
doc/filters.texi | 29 ++++
libavfilter/Makefile | 1 +
libavfilter/allfilters.c | 1 +
libavfilter/opencl/pad.cl | 34 +++++
libavfilter/opencl_source.h | 1 +
libavfilter/vf_pad_opencl.c | 289 ++++++++++++++++++++++++++++++++++++
7 files changed, 356 insertions(+)
create mode 100644 libavfilter/opencl/pad.cl
create mode 100644 libavfilter/vf_pad_opencl.c
diff --git a/configure b/configure
index 58419cd88c..45ba821f8b 100755
--- a/configure
+++ b/configure
@@ -3535,6 +3535,7 @@ overlay_qsv_filter_deps="libmfx"
overlay_qsv_filter_select="qsvvpp"
overlay_vulkan_filter_deps="vulkan libglslang"
owdenoise_filter_deps="gpl"
+pad_opencl_filter_deps="opencl"
pan_filter_deps="swresample"
perspective_filter_deps="gpl"
phase_filter_deps="gpl"
diff --git a/doc/filters.texi b/doc/filters.texi
index f96ba638b2..245968be34 100644
--- a/doc/filters.texi
+++ b/doc/filters.texi
@@ -21096,6 +21096,35 @@ The inputs have same memory layout for color channels , the overlay has addition
@end itemize
+ at section pad_opencl
+
+Add paddings to the input image, and place the original input at the
+provided @var{x}, @var{y} coordinates.
+
+It accepts the following options:
+
+ at table @option
+ at item width, w
+ at item height, h
+Specify the size of the output image with the
+paddings added. If the value for @var{width} or @var{height} is 0, the
+corresponding input size is used for the output.
+
+The default value of @var{width} and @var{height} is 0.
+
+ at item x
+ at item y
+Specify the offsets to place the input image at within the padded area,
+with respect to the top/left border of the output image.
+
+The default value of @var{x} and @var{y} is 0.
+
+ at item color
+Specify the color of the padded area. For the syntax of this option,
+check the @ref{color syntax,,"Color" section in the ffmpeg-utils
+manual,ffmpeg-utils}.
+ at end table
+
@section prewitt_opencl
Apply the Prewitt operator (@url{https://en.wikipedia.org/wiki/Prewitt_operator}) to input video stream.
diff --git a/libavfilter/Makefile b/libavfilter/Makefile
index 3053740dd3..f40849cdf8 100644
--- a/libavfilter/Makefile
+++ b/libavfilter/Makefile
@@ -328,6 +328,7 @@ OBJS-$(CONFIG_OVERLAY_QSV_FILTER) += vf_overlay_qsv.o framesync.o
OBJS-$(CONFIG_OVERLAY_VULKAN_FILTER) += vf_overlay_vulkan.o vulkan.o
OBJS-$(CONFIG_OWDENOISE_FILTER) += vf_owdenoise.o
OBJS-$(CONFIG_PAD_FILTER) += vf_pad.o
+OBJS-$(CONFIG_PAD_OPENCL_FILTER) += vf_pad_opencl.o opencl.o opencl/pad.o
OBJS-$(CONFIG_PALETTEGEN_FILTER) += vf_palettegen.o
OBJS-$(CONFIG_PALETTEUSE_FILTER) += vf_paletteuse.o framesync.o
OBJS-$(CONFIG_PERMS_FILTER) += f_perms.o
diff --git a/libavfilter/allfilters.c b/libavfilter/allfilters.c
index 1052978cd4..49e748ae88 100644
--- a/libavfilter/allfilters.c
+++ b/libavfilter/allfilters.c
@@ -312,6 +312,7 @@ extern AVFilter ff_vf_overlay_qsv;
extern AVFilter ff_vf_overlay_vulkan;
extern AVFilter ff_vf_owdenoise;
extern AVFilter ff_vf_pad;
+extern AVFilter ff_vf_pad_opencl;
extern AVFilter ff_vf_palettegen;
extern AVFilter ff_vf_paletteuse;
extern AVFilter ff_vf_perms;
diff --git a/libavfilter/opencl/pad.cl b/libavfilter/opencl/pad.cl
new file mode 100644
index 0000000000..43f95cc2fb
--- /dev/null
+++ b/libavfilter/opencl/pad.cl
@@ -0,0 +1,34 @@
+/*
+ * 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
+ */
+
+const sampler_t sampler = CLK_NORMALIZED_COORDS_FALSE |
+ CLK_FILTER_NEAREST;
+
+__kernel void pad (
+ __read_only image2d_t src,
+ __write_only image2d_t dst,
+ float4 color,
+ int2 xy)
+{
+ int2 size_src = get_image_dim(src);
+ int2 loc = (int2)(get_global_id(0), get_global_id(1));
+ int2 src_pos = (int2)(get_global_id(0) - xy.x, get_global_id(1) - xy.y);
+ float4 pixel = read_imagef(src, sampler, src_pos);
+ write_imagef(dst, loc, loc.x >= size_src.x + xy.x || loc.y >= size_src.y + xy.y ||
+ loc.x < xy.x || loc.y < xy.y ? color : pixel);
+}
diff --git a/libavfilter/opencl_source.h b/libavfilter/opencl_source.h
index 4e262672ad..7e8133090e 100644
--- a/libavfilter/opencl_source.h
+++ b/libavfilter/opencl_source.h
@@ -27,6 +27,7 @@ extern const char *ff_opencl_source_deshake;
extern const char *ff_opencl_source_neighbor;
extern const char *ff_opencl_source_nlmeans;
extern const char *ff_opencl_source_overlay;
+extern const char *ff_opencl_source_pad;
extern const char *ff_opencl_source_tonemap;
extern const char *ff_opencl_source_transpose;
extern const char *ff_opencl_source_unsharp;
diff --git a/libavfilter/vf_pad_opencl.c b/libavfilter/vf_pad_opencl.c
new file mode 100644
index 0000000000..ca365c8d92
--- /dev/null
+++ b/libavfilter/vf_pad_opencl.c
@@ -0,0 +1,289 @@
+/*
+ * 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/colorspace.h"
+#include "libavutil/opt.h"
+#include "libavutil/imgutils.h"
+#include "avfilter.h"
+#include "formats.h"
+#include "internal.h"
+#include "opencl.h"
+#include "opencl_source.h"
+#include "video.h"
+
+typedef struct PadOpenCLContext {
+ OpenCLFilterContext ocf;
+ int initialized;
+ int is_rgb;
+ int is_packed;
+ int hsub, vsub;
+
+ cl_command_queue command_queue;
+ cl_kernel kernel_pad;
+
+ int w, h;
+ int x, y;
+ uint8_t pad_rgba[4];
+ uint8_t pad_color[4];
+ cl_float4 pad_color_float;
+ cl_int2 pad_pos;
+} PadOpenCLContext;
+
+static int pad_opencl_init(AVFilterContext *avctx, AVFrame *input_frame)
+{
+ PadOpenCLContext *ctx = avctx->priv;
+ AVHWFramesContext *input_frames_ctx = (AVHWFramesContext *)input_frame->hw_frames_ctx->data;
+ const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(input_frames_ctx->sw_format);
+ cl_int cle;
+ int err;
+
+ ctx->is_rgb = !!(desc->flags & AV_PIX_FMT_FLAG_RGB);
+ ctx->is_packed = !(desc->flags & AV_PIX_FMT_FLAG_PLANAR);
+ ctx->hsub = desc->log2_chroma_w;
+ ctx->vsub = desc->log2_chroma_h;
+
+ err = ff_opencl_filter_load_program(avctx, &ff_opencl_source_pad, 1);
+ if (err < 0)
+ goto fail;
+
+ ctx->command_queue = clCreateCommandQueue(
+ ctx->ocf.hwctx->context,
+ ctx->ocf.hwctx->device_id,
+ 0,
+ &cle
+ );
+
+ if (ctx->is_rgb) {
+ ctx->pad_color[0] = ctx->pad_rgba[0];
+ ctx->pad_color[1] = ctx->pad_rgba[1];
+ ctx->pad_color[2] = ctx->pad_rgba[2];
+ ctx->pad_color[3] = ctx->pad_rgba[3];
+ } else {
+ ctx->pad_color[0] = RGB_TO_Y_BT709(ctx->pad_rgba[0], ctx->pad_rgba[1], ctx->pad_rgba[2]);
+ ctx->pad_color[1] = RGB_TO_U_BT709(ctx->pad_rgba[0], ctx->pad_rgba[1], ctx->pad_rgba[2], 0);
+ ctx->pad_color[2] = RGB_TO_V_BT709(ctx->pad_rgba[0], ctx->pad_rgba[1], ctx->pad_rgba[2], 0);
+ ctx->pad_color[3] = ctx->pad_rgba[3];
+ }
+
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create OpenCL command queue %d.\n", cle);
+
+ ctx->kernel_pad = clCreateKernel(ctx->ocf.program, "pad", &cle);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create pad kernel: %d.\n", cle);
+
+ for (int i = 0; i < 4; ++i) {
+ ctx->pad_color_float.s[i] = (float)ctx->pad_color[i] / 255.0;
+ }
+
+ ctx->pad_pos.s[0] = ctx->x;
+ ctx->pad_pos.s[1] = ctx->y;
+
+ ctx->initialized = 1;
+ return 0;
+
+fail:
+ if (ctx->command_queue)
+ clReleaseCommandQueue(ctx->command_queue);
+ if (ctx->kernel_pad)
+ clReleaseKernel(ctx->kernel_pad);
+ return err;
+}
+
+static int filter_frame(AVFilterLink *link, AVFrame *input_frame)
+{
+ AVFilterContext *avctx = link->dst;
+ AVFilterLink *outlink = avctx->outputs[0];
+ PadOpenCLContext *pad_ctx = avctx->priv;
+ AVFrame *output_frame = NULL;
+ int err;
+ cl_int cle;
+ size_t global_work[2];
+ cl_mem src, dst;
+
+ if (!input_frame->hw_frames_ctx)
+ return AVERROR(EINVAL);
+
+ if (!pad_ctx->initialized) {
+ err = pad_opencl_init(avctx, input_frame);
+ if (err < 0)
+ goto fail;
+ }
+
+ output_frame = ff_get_video_buffer(outlink, outlink->w, outlink->h);
+ if (!output_frame) {
+ err = AVERROR(ENOMEM);
+ goto fail;
+ }
+
+ for (int p = 0; p < FF_ARRAY_ELEMS(output_frame->data); p++) {
+ cl_float4 pad_color_float;
+ cl_int2 pad_pos;
+
+ if (pad_ctx->is_packed) {
+ pad_color_float = pad_ctx->pad_color_float;
+ } else {
+ pad_color_float.s[0] = pad_ctx->pad_color_float.s[p];
+ }
+
+ if (p > 0 && p < 3) {
+ pad_pos.s[0] = pad_ctx->pad_pos.s[0] >> pad_ctx->hsub;
+ pad_pos.s[1] = pad_ctx->pad_pos.s[1] >> pad_ctx->vsub;
+ } else {
+ pad_pos.s[0] = pad_ctx->pad_pos.s[0];
+ pad_pos.s[1] = pad_ctx->pad_pos.s[1];
+ }
+
+ src = (cl_mem)input_frame->data[p];
+ dst = (cl_mem)output_frame->data[p];
+
+ if (!dst)
+ break;
+
+ CL_SET_KERNEL_ARG(pad_ctx->kernel_pad, 0, cl_mem, &src);
+ CL_SET_KERNEL_ARG(pad_ctx->kernel_pad, 1, cl_mem, &dst);
+ CL_SET_KERNEL_ARG(pad_ctx->kernel_pad, 2, cl_float4, &pad_color_float);
+ CL_SET_KERNEL_ARG(pad_ctx->kernel_pad, 3, cl_int2, &pad_pos);
+
+ err = ff_opencl_filter_work_size_from_image(avctx, global_work, output_frame, p, 16);
+ if (err < 0)
+ goto fail;
+
+ cle = clEnqueueNDRangeKernel(pad_ctx->command_queue, pad_ctx->kernel_pad, 2, NULL,
+ global_work, NULL, 0, NULL, NULL);
+
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue pad kernel: %d.\n", cle);
+ }
+
+ // Run queued kernel
+ cle = clFinish(pad_ctx->command_queue);
+ CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle);
+
+ err = av_frame_copy_props(output_frame, input_frame);
+ if (err < 0)
+ goto fail;
+
+ av_frame_free(&input_frame);
+
+ return ff_filter_frame(outlink, output_frame);
+
+fail:
+ clFinish(pad_ctx->command_queue);
+ av_frame_free(&input_frame);
+ av_frame_free(&output_frame);
+ return err;
+}
+
+static av_cold void pad_opencl_uninit(AVFilterContext *avctx)
+{
+ PadOpenCLContext *ctx = avctx->priv;
+ cl_int cle;
+
+ if (ctx->kernel_pad) {
+ cle = clReleaseKernel(ctx->kernel_pad);
+ 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);
+}
+
+static int pad_opencl_config_output(AVFilterLink *outlink)
+{
+ AVFilterContext *avctx = outlink->src;
+ PadOpenCLContext *ctx = avctx->priv;
+ int err;
+
+ if (ctx->w < avctx->inputs[0]->w ||
+ ctx->h < avctx->inputs[0]->h) {
+ return AVERROR(EINVAL);
+ }
+
+ if (ctx->w > avctx->inputs[0]->w && ctx->h > avctx->inputs[0]->h) {
+ ctx->ocf.output_width = ctx->w;
+ ctx->ocf.output_height = ctx->h;
+ } else {
+ ctx->ocf.output_width = avctx->inputs[0]->w;
+ ctx->ocf.output_height = avctx->inputs[0]->h;
+ }
+
+ if (ctx->x + avctx->inputs[0]->w > ctx->ocf.output_width ||
+ ctx->y + avctx->inputs[0]->h > ctx->ocf.output_height) {
+ return AVERROR(EINVAL);
+ }
+
+ err = ff_opencl_filter_config_output(outlink);
+ if (err < 0)
+ return err;
+
+ return 0;
+}
+
+static const AVFilterPad pad_opencl_inputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .filter_frame = filter_frame,
+ .config_props = &ff_opencl_filter_config_input,
+ },
+ { NULL }
+};
+
+static const AVFilterPad pad_opencl_outputs[] = {
+ {
+ .name = "default",
+ .type = AVMEDIA_TYPE_VIDEO,
+ .config_props = &pad_opencl_config_output,
+ },
+ { NULL }
+};
+
+#define OFFSET(x) offsetof(PadOpenCLContext, x)
+#define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
+
+static const AVOption pad_opencl_options[] = {
+ { "width", "set the pad area width", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT16_MAX, FLAGS },
+ { "w", "set the pad area width", OFFSET(w), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT16_MAX, FLAGS },
+ { "height", "set the pad area height", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT16_MAX, FLAGS },
+ { "h", "set the pad area height", OFFSET(h), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT16_MAX, FLAGS },
+ { "x", "set the x offset for the input image position", OFFSET(x), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT16_MAX, FLAGS },
+ { "y", "set the y offset for the input image position", OFFSET(y), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT16_MAX, FLAGS },
+ { "color", "set the color of the padded area border", OFFSET(pad_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, CHAR_MIN, CHAR_MAX, FLAGS },
+ { NULL }
+};
+
+AVFILTER_DEFINE_CLASS(pad_opencl);
+
+AVFilter ff_vf_pad_opencl = {
+ .name = "pad_opencl",
+ .description = NULL_IF_CONFIG_SMALL("Pad the input video."),
+ .priv_size = sizeof(PadOpenCLContext),
+ .priv_class = &pad_opencl_class,
+ .init = &ff_opencl_filter_init,
+ .uninit = &pad_opencl_uninit,
+ .query_formats = &ff_opencl_filter_query_formats,
+ .inputs = pad_opencl_inputs,
+ .outputs = pad_opencl_outputs,
+ .flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE
+};
--
2.17.1
More information about the ffmpeg-devel
mailing list