mirror of https://git.ffmpeg.org/ffmpeg.git
327 lines
10 KiB
C
327 lines
10 KiB
C
/*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/log.h"
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#include "libavutil/opt.h"
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#include "libavutil/pixdesc.h"
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#include "avfilter.h"
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#include "framesync.h"
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#include "internal.h"
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#include "opencl.h"
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#include "opencl_source.h"
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#include "video.h"
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typedef struct OverlayOpenCLContext {
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OpenCLFilterContext ocf;
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int initialised;
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cl_kernel kernel;
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cl_command_queue command_queue;
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FFFrameSync fs;
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int nb_planes;
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int x_subsample;
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int y_subsample;
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int alpha_separate;
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int x_position;
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int y_position;
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} OverlayOpenCLContext;
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static int overlay_opencl_load(AVFilterContext *avctx,
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enum AVPixelFormat main_format,
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enum AVPixelFormat overlay_format)
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{
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OverlayOpenCLContext *ctx = avctx->priv;
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cl_int cle;
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const char *source = ff_source_overlay_cl;
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const char *kernel;
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const AVPixFmtDescriptor *main_desc, *overlay_desc;
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int err, i, main_planes, overlay_planes;
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main_desc = av_pix_fmt_desc_get(main_format);
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overlay_desc = av_pix_fmt_desc_get(overlay_format);
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main_planes = overlay_planes = 0;
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for (i = 0; i < main_desc->nb_components; i++)
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main_planes = FFMAX(main_planes,
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main_desc->comp[i].plane + 1);
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for (i = 0; i < overlay_desc->nb_components; i++)
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overlay_planes = FFMAX(overlay_planes,
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overlay_desc->comp[i].plane + 1);
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ctx->nb_planes = main_planes;
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ctx->x_subsample = 1 << main_desc->log2_chroma_w;
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ctx->y_subsample = 1 << main_desc->log2_chroma_h;
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if (ctx->x_position % ctx->x_subsample ||
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ctx->y_position % ctx->y_subsample) {
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av_log(avctx, AV_LOG_WARNING, "Warning: overlay position (%d, %d) "
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"does not match subsampling (%d, %d).\n",
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ctx->x_position, ctx->y_position,
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ctx->x_subsample, ctx->y_subsample);
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}
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if (main_planes == overlay_planes) {
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if (main_desc->nb_components == overlay_desc->nb_components)
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kernel = "overlay_no_alpha";
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else
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kernel = "overlay_internal_alpha";
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ctx->alpha_separate = 0;
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} else {
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kernel = "overlay_external_alpha";
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ctx->alpha_separate = 1;
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}
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av_log(avctx, AV_LOG_DEBUG, "Using kernel %s.\n", kernel);
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err = ff_opencl_filter_load_program(avctx, &source, 1);
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if (err < 0)
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goto fail;
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ctx->command_queue = clCreateCommandQueue(ctx->ocf.hwctx->context,
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ctx->ocf.hwctx->device_id,
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0, &cle);
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create OpenCL "
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"command queue %d.\n", cle);
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ctx->kernel = clCreateKernel(ctx->ocf.program, kernel, &cle);
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to create kernel %d.\n", cle);
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ctx->initialised = 1;
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return 0;
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fail:
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if (ctx->command_queue)
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clReleaseCommandQueue(ctx->command_queue);
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if (ctx->kernel)
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clReleaseKernel(ctx->kernel);
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return err;
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}
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static int overlay_opencl_blend(FFFrameSync *fs)
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{
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AVFilterContext *avctx = fs->parent;
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AVFilterLink *outlink = avctx->outputs[0];
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OverlayOpenCLContext *ctx = avctx->priv;
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AVFrame *input_main, *input_overlay;
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AVFrame *output;
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cl_mem mem;
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cl_int cle, x, y;
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size_t global_work[2];
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int kernel_arg = 0;
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int err, plane;
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err = ff_framesync_get_frame(fs, 0, &input_main, 0);
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if (err < 0)
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return err;
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err = ff_framesync_get_frame(fs, 1, &input_overlay, 0);
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if (err < 0)
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return err;
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if (!ctx->initialised) {
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AVHWFramesContext *main_fc =
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(AVHWFramesContext*)input_main->hw_frames_ctx->data;
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AVHWFramesContext *overlay_fc =
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(AVHWFramesContext*)input_overlay->hw_frames_ctx->data;
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err = overlay_opencl_load(avctx, main_fc->sw_format,
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overlay_fc->sw_format);
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if (err < 0)
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return err;
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}
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output = ff_get_video_buffer(outlink, outlink->w, outlink->h);
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if (!output) {
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err = AVERROR(ENOMEM);
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goto fail;
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}
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for (plane = 0; plane < ctx->nb_planes; plane++) {
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kernel_arg = 0;
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mem = (cl_mem)output->data[plane];
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
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kernel_arg++;
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mem = (cl_mem)input_main->data[plane];
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
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kernel_arg++;
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mem = (cl_mem)input_overlay->data[plane];
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
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kernel_arg++;
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if (ctx->alpha_separate) {
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mem = (cl_mem)input_overlay->data[ctx->nb_planes];
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_mem, &mem);
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kernel_arg++;
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}
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x = ctx->x_position / (plane == 0 ? 1 : ctx->x_subsample);
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y = ctx->y_position / (plane == 0 ? 1 : ctx->y_subsample);
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &x);
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kernel_arg++;
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &y);
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kernel_arg++;
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if (ctx->alpha_separate) {
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cl_int alpha_adj_x = plane == 0 ? 1 : ctx->x_subsample;
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cl_int alpha_adj_y = plane == 0 ? 1 : ctx->y_subsample;
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &alpha_adj_x);
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kernel_arg++;
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CL_SET_KERNEL_ARG(ctx->kernel, kernel_arg, cl_int, &alpha_adj_y);
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kernel_arg++;
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}
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err = ff_opencl_filter_work_size_from_image(avctx, global_work,
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output, plane, 0);
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if (err < 0)
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goto fail;
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cle = clEnqueueNDRangeKernel(ctx->command_queue, ctx->kernel, 2, NULL,
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global_work, NULL, 0, NULL, NULL);
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to enqueue overlay kernel "
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"for plane %d: %d.\n", plane, cle);
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}
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cle = clFinish(ctx->command_queue);
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CL_FAIL_ON_ERROR(AVERROR(EIO), "Failed to finish command queue: %d.\n", cle);
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err = av_frame_copy_props(output, input_main);
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av_log(avctx, AV_LOG_DEBUG, "Filter output: %s, %ux%u (%"PRId64").\n",
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av_get_pix_fmt_name(output->format),
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output->width, output->height, output->pts);
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return ff_filter_frame(outlink, output);
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fail:
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av_frame_free(&output);
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return err;
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}
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static int overlay_opencl_config_output(AVFilterLink *outlink)
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{
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AVFilterContext *avctx = outlink->src;
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OverlayOpenCLContext *ctx = avctx->priv;
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int err;
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err = ff_opencl_filter_config_output(outlink);
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if (err < 0)
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return err;
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err = ff_framesync_init_dualinput(&ctx->fs, avctx);
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if (err < 0)
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return err;
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return ff_framesync_configure(&ctx->fs);
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}
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static av_cold int overlay_opencl_init(AVFilterContext *avctx)
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{
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OverlayOpenCLContext *ctx = avctx->priv;
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ctx->fs.on_event = &overlay_opencl_blend;
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return ff_opencl_filter_init(avctx);
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}
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static int overlay_opencl_activate(AVFilterContext *avctx)
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{
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OverlayOpenCLContext *ctx = avctx->priv;
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return ff_framesync_activate(&ctx->fs);
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}
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static av_cold void overlay_opencl_uninit(AVFilterContext *avctx)
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{
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OverlayOpenCLContext *ctx = avctx->priv;
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cl_int cle;
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if (ctx->kernel) {
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cle = clReleaseKernel(ctx->kernel);
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if (cle != CL_SUCCESS)
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av_log(avctx, AV_LOG_ERROR, "Failed to release "
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"kernel: %d.\n", cle);
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}
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if (ctx->command_queue) {
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cle = clReleaseCommandQueue(ctx->command_queue);
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if (cle != CL_SUCCESS)
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av_log(avctx, AV_LOG_ERROR, "Failed to release "
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"command queue: %d.\n", cle);
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}
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ff_opencl_filter_uninit(avctx);
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ff_framesync_uninit(&ctx->fs);
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}
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#define OFFSET(x) offsetof(OverlayOpenCLContext, x)
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#define FLAGS (AV_OPT_FLAG_FILTERING_PARAM | AV_OPT_FLAG_VIDEO_PARAM)
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static const AVOption overlay_opencl_options[] = {
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{ "x", "Overlay x position",
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OFFSET(x_position), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
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{ "y", "Overlay y position",
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OFFSET(y_position), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, INT_MAX, .flags = FLAGS },
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{ NULL },
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};
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AVFILTER_DEFINE_CLASS(overlay_opencl);
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static const AVFilterPad overlay_opencl_inputs[] = {
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{
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.name = "main",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = &ff_opencl_filter_config_input,
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},
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{
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.name = "overlay",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = &ff_opencl_filter_config_input,
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},
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};
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static const AVFilterPad overlay_opencl_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = &overlay_opencl_config_output,
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},
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};
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const AVFilter ff_vf_overlay_opencl = {
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.name = "overlay_opencl",
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.description = NULL_IF_CONFIG_SMALL("Overlay one video on top of another"),
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.priv_size = sizeof(OverlayOpenCLContext),
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.priv_class = &overlay_opencl_class,
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.init = &overlay_opencl_init,
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.uninit = &overlay_opencl_uninit,
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.activate = &overlay_opencl_activate,
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FILTER_INPUTS(overlay_opencl_inputs),
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FILTER_OUTPUTS(overlay_opencl_outputs),
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FILTER_SINGLE_PIXFMT(AV_PIX_FMT_OPENCL),
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.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
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.flags = AVFILTER_FLAG_HWDEVICE,
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};
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