From patchwork Mon Feb 10 12:03:07 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paul B Mahol X-Patchwork-Id: 17746 Return-Path: X-Original-To: patchwork@ffaux-bg.ffmpeg.org Delivered-To: patchwork@ffaux-bg.ffmpeg.org Received: from ffbox0-bg.mplayerhq.hu (ffbox0-bg.ffmpeg.org [79.124.17.100]) by ffaux.localdomain (Postfix) with ESMTP id 9543644B7BA for ; Mon, 10 Feb 2020 14:03:23 +0200 (EET) Received: from [127.0.1.1] (localhost [127.0.0.1]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTP id 695FD6898D2; Mon, 10 Feb 2020 14:03:23 +0200 (EET) X-Original-To: ffmpeg-devel@ffmpeg.org Delivered-To: ffmpeg-devel@ffmpeg.org Received: from mail-wr1-f67.google.com (mail-wr1-f67.google.com [209.85.221.67]) by ffbox0-bg.mplayerhq.hu (Postfix) with ESMTPS id 9F67D6898D2 for ; Mon, 10 Feb 2020 14:03:16 +0200 (EET) Received: by mail-wr1-f67.google.com with SMTP id c9so7334390wrw.8 for ; Mon, 10 Feb 2020 04:03:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:subject:date:message-id; bh=madSNAOpr3C4pxXqIX1uEZURcVE2PWQ++bE4JjychB0=; b=AzBrpIFEX1DJj6a49XqZ5WLCS1GfDTpVwqetjjDOoIq3L4Y9oxyiNydG3nSGTpCwPl yY2t17tTxk7zcKUh3Xer5YiRYhibcNLUIFGCyFVNFxEoJRSUj4+RAG0xPvd2EzB6qKAP WpMkmc6ecD+hNTB3SqVYZhZTvi+HKDQV70VIHnSrQnRZBpQnSeSopnNAt9kjHHNwb1ZJ Rq2Ahs7zp3QeF+L5XDJ9TWsDiZp4aPRrdplxTU++z+RHFkmspiZEBevAltUvCR2PxCnS C2i1G14VajfhrCc1mV7hOZrPETJXxEsh24MKoMlDPJ2jkQQ7ix53bSeAFDUDDn7MSqm2 YghA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=madSNAOpr3C4pxXqIX1uEZURcVE2PWQ++bE4JjychB0=; b=tYMpiNyOm0xwyRLH9kkhoHtT0/GYlG7+WFPozmcDwePZ8AgtSDxmF/7AlrCjv4Wayw 9dstwbbfZjE9LPa6xNm4OjS21fcC/Dg96dnY7jC6rneXIUi5bOSWbR+iDGBsMqJpZA6Y xDIoIanXMxBdqztbzvQv8jrXK14fDxbzHC8bT9Ce8rql2SA7xqvZHmkO9leV8YJTBxZi Nf/Voc336/d+/Layz1T+Kx61Of5T44AJrAMhr+dq3YmkFDh3KDIR3rMkQEJqvxevDQ2Y DBVT4kcf011f5HjbdAlwoVCtd8AxITCXWhZAGBvkAJMpRkyLOGj4s8nEPM0wiQY0iBrm Hywg== X-Gm-Message-State: APjAAAV33IjtpqVh3ii+n1XD2egC0477IZlywb6EyuiK1X2DGeIyXEzt TxUuVRc/6AnRuMIRJA2fMS3PHAsD X-Google-Smtp-Source: APXvYqxp5ZydZaR0AVSJ8bw9CCL4MugCMGYykBSGOVJ0M71CSdzpQgO7ojh9+dIQwX9ORIdeKsNPMg== X-Received: by 2002:a05:6000:10c:: with SMTP id o12mr1720873wrx.106.1581336195080; Mon, 10 Feb 2020 04:03:15 -0800 (PST) Received: from localhost.localdomain ([77.237.111.189]) by smtp.gmail.com with ESMTPSA id w22sm297106wmk.34.2020.02.10.04.03.13 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 10 Feb 2020 04:03:14 -0800 (PST) From: Paul B Mahol To: ffmpeg-devel@ffmpeg.org Date: Mon, 10 Feb 2020 13:03:07 +0100 Message-Id: <20200210120307.12503-1-onemda@gmail.com> X-Mailer: git-send-email 2.17.1 Subject: [FFmpeg-devel] [PATCH] avfilter: add pad opencl filter X-BeenThere: ffmpeg-devel@ffmpeg.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: FFmpeg development discussions and patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: FFmpeg development discussions and patches MIME-Version: 1.0 Errors-To: ffmpeg-devel-bounces@ffmpeg.org Sender: "ffmpeg-devel" Signed-off-by: Paul B Mahol --- configure | 1 + doc/filters.texi | 77 +++++++ libavfilter/Makefile | 1 + libavfilter/allfilters.c | 1 + libavfilter/opencl/pad.cl | 36 ++++ libavfilter/opencl_source.h | 1 + libavfilter/vf_pad_opencl.c | 397 ++++++++++++++++++++++++++++++++++++ 7 files changed, 514 insertions(+) create mode 100644 libavfilter/opencl/pad.cl create mode 100644 libavfilter/vf_pad_opencl.c diff --git a/configure b/configure index 51cdc7b2cb..ab761c7183 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 bdc5700973..1791ede41a 100644 --- a/doc/filters.texi +++ b/doc/filters.texi @@ -21144,6 +21144,83 @@ The inputs have same memory layout for color channels , the overlay has addition @end itemize +@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: + +@table @option +@item width, w +@item height, h +Specify an expression for 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 @var{width} expression can reference the value set by the +@var{height} expression, and vice versa. + +The default value of @var{width} and @var{height} is 0. + +@item x +@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 @var{x} expression can reference the value set by the @var{y} +expression, and vice versa. + +The default value of @var{x} and @var{y} is 0. + +If @var{x} or @var{y} evaluate to a negative number, they'll be changed +so the input image is centered on the padded area. + +@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}. + +@item aspect +Pad to aspect instead to a resolution. +@end table + +The value for the @var{width}, @var{height}, @var{x}, and @var{y} +options are expressions containing the following constants: + +@table @option +@item in_w +@item in_h +The input video width and height. + +@item iw +@item ih +These are the same as @var{in_w} and @var{in_h}. + +@item out_w +@item out_h +The output width and height (the size of the padded area), as +specified by the @var{width} and @var{height} expressions. + +@item ow +@item oh +These are the same as @var{out_w} and @var{out_h}. + +@item x +@item y +The x and y offsets as specified by the @var{x} and @var{y} +expressions, or NAN if not yet specified. + +@item a +same as @var{iw} / @var{ih} + +@item sar +input sample aspect ratio + +@item dar +input display aspect ratio, it is the same as (@var{iw} / @var{ih}) * @var{sar} +@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 cc00e2c4ac..089880a39d 100644 --- a/libavfilter/Makefile +++ b/libavfilter/Makefile @@ -329,6 +329,7 @@ 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 01a7a8bf9f..88ebd121ad 100644 --- a/libavfilter/allfilters.c +++ b/libavfilter/allfilters.c @@ -313,6 +313,7 @@ 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..e8dd6d6e42 --- /dev/null +++ b/libavfilter/opencl/pad.cl @@ -0,0 +1,36 @@ +/* + * 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 = loc.x >= size_src.x + xy.x || + loc.y >= size_src.y + xy.y || + loc.x < xy.x || + loc.y < xy.y ? color : read_imagef(src, sampler, src_pos); + write_imagef(dst, loc, 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..1129c40c60 --- /dev/null +++ b/libavfilter/vf_pad_opencl.c @@ -0,0 +1,397 @@ +/* + * 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/eval.h" +#include "libavutil/opt.h" +#include "libavutil/imgutils.h" +#include "avfilter.h" +#include "drawutils.h" +#include "formats.h" +#include "internal.h" +#include "opencl.h" +#include "opencl_source.h" +#include "video.h" + +static const char *const var_names[] = { + "in_w", "iw", + "in_h", "ih", + "out_w", "ow", + "out_h", "oh", + "x", + "y", + "a", + "sar", + "dar", + NULL +}; + +enum var_name { + VAR_IN_W, VAR_IW, + VAR_IN_H, VAR_IH, + VAR_OUT_W, VAR_OW, + VAR_OUT_H, VAR_OH, + VAR_X, + VAR_Y, + VAR_A, + VAR_SAR, + VAR_DAR, + VARS_NB +}; + +typedef struct PadOpenCLContext { + OpenCLFilterContext ocf; + int initialized; + int is_rgb; + int is_packed; + int hsub, vsub; + + char *w_expr; + char *h_expr; + char *x_expr; + char *y_expr; + AVRational aspect; + + 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); + uint8_t rgba_map[4]; + cl_int cle; + int err; + + ff_fill_rgba_map(rgba_map, input_frames_ctx->sw_format); + 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[rgba_map[0]] = ctx->pad_rgba[0]; + ctx->pad_color[rgba_map[1]] = ctx->pad_rgba[1]; + ctx->pad_color[rgba_map[2]] = ctx->pad_rgba[2]; + ctx->pad_color[rgba_map[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]; + pad_color_float.s[1] = pad_ctx->pad_color_float.s[2]; + } + + 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; + AVFilterLink *inlink = avctx->inputs[0]; + PadOpenCLContext *ctx = avctx->priv; + AVRational adjusted_aspect = ctx->aspect; + double var_values[VARS_NB], res; + int err, ret; + char *expr; + + var_values[VAR_IN_W] = var_values[VAR_IW] = inlink->w; + var_values[VAR_IN_H] = var_values[VAR_IH] = inlink->h; + var_values[VAR_OUT_W] = var_values[VAR_OW] = NAN; + var_values[VAR_OUT_H] = var_values[VAR_OH] = NAN; + var_values[VAR_A] = (double) inlink->w / inlink->h; + var_values[VAR_SAR] = inlink->sample_aspect_ratio.num ? + (double) inlink->sample_aspect_ratio.num / inlink->sample_aspect_ratio.den : 1; + var_values[VAR_DAR] = var_values[VAR_A] * var_values[VAR_SAR]; + + av_expr_parse_and_eval(&res, (expr = ctx->w_expr), + var_names, var_values, + NULL, NULL, NULL, NULL, NULL, 0, ctx); + ctx->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res; + if ((ret = av_expr_parse_and_eval(&res, (expr = ctx->h_expr), + var_names, var_values, + NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) + return ret; + ctx->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = res; + if (!ctx->h) + var_values[VAR_OUT_H] = var_values[VAR_OH] = ctx->h = inlink->h; + + /* evaluate the width again, as it may depend on the evaluated output height */ + if ((ret = av_expr_parse_and_eval(&res, (expr = ctx->w_expr), + var_names, var_values, + NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) + return ret; + ctx->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = res; + if (!ctx->w) + var_values[VAR_OUT_W] = var_values[VAR_OW] = ctx->w = inlink->w; + + if (adjusted_aspect.num && adjusted_aspect.den) { + adjusted_aspect = av_div_q(adjusted_aspect, inlink->sample_aspect_ratio); + if (ctx->h < av_rescale(ctx->w, adjusted_aspect.den, adjusted_aspect.num)) { + ctx->h = var_values[VAR_OUT_H] = var_values[VAR_OH] = av_rescale(ctx->w, adjusted_aspect.den, adjusted_aspect.num); + } else { + ctx->w = var_values[VAR_OUT_W] = var_values[VAR_OW] = av_rescale(ctx->h, adjusted_aspect.num, adjusted_aspect.den); + } + } + + /* evaluate x and y */ + av_expr_parse_and_eval(&res, (expr = ctx->x_expr), + var_names, var_values, + NULL, NULL, NULL, NULL, NULL, 0, ctx); + ctx->x = var_values[VAR_X] = res; + if ((ret = av_expr_parse_and_eval(&res, (expr = ctx->y_expr), + var_names, var_values, + NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) + return ret; + ctx->y = var_values[VAR_Y] = res; + /* evaluate x again, as it may depend on the evaluated y value */ + if ((ret = av_expr_parse_and_eval(&res, (expr = ctx->x_expr), + var_names, var_values, + NULL, NULL, NULL, NULL, NULL, 0, ctx)) < 0) + return ret; + ctx->x = var_values[VAR_X] = res; + + if (ctx->x < 0 || ctx->x + inlink->w > ctx->w) + ctx->x = var_values[VAR_X] = (ctx->w - inlink->w) / 2; + if (ctx->y < 0 || ctx->y + inlink->h > ctx->h) + ctx->y = var_values[VAR_Y] = (ctx->h - inlink->h) / 2; + + /* sanity check params */ + if (ctx->w < inlink->w || ctx->h < inlink->h) { + av_log(ctx, AV_LOG_ERROR, "Padded dimensions cannot be smaller than input dimensions.\n"); + return AVERROR(EINVAL); + } + + if (ctx->w > avctx->inputs[0]->w) { + ctx->ocf.output_width = ctx->w; + } else { + ctx->ocf.output_width = avctx->inputs[0]->w; + } + + if (ctx->h > avctx->inputs[0]->h) { + ctx->ocf.output_height = ctx->h; + } else { + 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_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, FLAGS }, + { "w", "set the pad area width", OFFSET(w_expr), AV_OPT_TYPE_STRING, {.str = "iw"}, 0, 0, FLAGS }, + { "height", "set the pad area height", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, FLAGS }, + { "h", "set the pad area height", OFFSET(h_expr), AV_OPT_TYPE_STRING, {.str = "ih"}, 0, 0, FLAGS }, + { "x", "set the x offset for the input image position", OFFSET(x_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, INT16_MAX, FLAGS }, + { "y", "set the y offset for the input image position", OFFSET(y_expr), AV_OPT_TYPE_STRING, {.str = "0"}, 0, INT16_MAX, FLAGS }, + { "color", "set the color of the padded area border", OFFSET(pad_rgba), AV_OPT_TYPE_COLOR, { .str = "black" }, 0, 0, FLAGS }, + { "aspect", "pad to fit an aspect instead of a resolution", OFFSET(aspect), AV_OPT_TYPE_RATIONAL, {.dbl = 0}, 0, INT16_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 +};