diff options
Diffstat (limited to 'libavfilter/vf_pad_opencl.c')
-rw-r--r-- | libavfilter/vf_pad_opencl.c | 397 |
1 files changed, 397 insertions, 0 deletions
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 +}; |