mirror of
https://git.videolan.org/git/ffmpeg.git
synced 2024-09-27 15:41:54 +02:00
37cb26bf79
Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
448 lines
14 KiB
C
448 lines
14 KiB
C
/*
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* Copyright (c) 2017, NVIDIA CORPORATION. All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#include "libavutil/hwcontext.h"
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#include "libavutil/hwcontext_cuda_internal.h"
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#include "libavutil/cuda_check.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 "internal.h"
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#include "cuda/load_helper.h"
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#define CHECK_CU(x) FF_CUDA_CHECK_DL(ctx, s->hwctx->internal->cuda_dl, x)
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#define HIST_SIZE (3*256)
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#define DIV_UP(a, b) ( ((a) + (b) - 1) / (b) )
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#define BLOCKX 32
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#define BLOCKY 16
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static const enum AVPixelFormat supported_formats[] = {
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AV_PIX_FMT_NV12,
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AV_PIX_FMT_YUV420P,
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AV_PIX_FMT_YUV444P,
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AV_PIX_FMT_P010,
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AV_PIX_FMT_P016,
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AV_PIX_FMT_YUV444P16,
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};
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struct thumb_frame {
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AVFrame *buf; ///< cached frame
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int histogram[HIST_SIZE]; ///< RGB color distribution histogram of the frame
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};
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typedef struct ThumbnailCudaContext {
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const AVClass *class;
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int n; ///< current frame
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int n_frames; ///< number of frames for analysis
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struct thumb_frame *frames; ///< the n_frames frames
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AVRational tb; ///< copy of the input timebase to ease access
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AVBufferRef *hw_frames_ctx;
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AVCUDADeviceContext *hwctx;
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CUmodule cu_module;
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CUfunction cu_func_uchar;
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CUfunction cu_func_uchar2;
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CUfunction cu_func_ushort;
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CUfunction cu_func_ushort2;
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CUstream cu_stream;
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CUdeviceptr data;
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} ThumbnailCudaContext;
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#define OFFSET(x) offsetof(ThumbnailCudaContext, x)
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#define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM
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static const AVOption thumbnail_cuda_options[] = {
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{ "n", "set the frames batch size", OFFSET(n_frames), AV_OPT_TYPE_INT, {.i64=100}, 2, INT_MAX, FLAGS },
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{ NULL }
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};
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AVFILTER_DEFINE_CLASS(thumbnail_cuda);
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static av_cold int init(AVFilterContext *ctx)
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{
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ThumbnailCudaContext *s = ctx->priv;
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s->frames = av_calloc(s->n_frames, sizeof(*s->frames));
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if (!s->frames) {
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av_log(ctx, AV_LOG_ERROR,
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"Allocation failure, try to lower the number of frames\n");
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return AVERROR(ENOMEM);
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}
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av_log(ctx, AV_LOG_VERBOSE, "batch size: %d frames\n", s->n_frames);
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return 0;
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}
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/**
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* @brief Compute Sum-square deviation to estimate "closeness".
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* @param hist color distribution histogram
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* @param median average color distribution histogram
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* @return sum of squared errors
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*/
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static double frame_sum_square_err(const int *hist, const double *median)
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{
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int i;
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double err, sum_sq_err = 0;
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for (i = 0; i < HIST_SIZE; i++) {
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err = median[i] - (double)hist[i];
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sum_sq_err += err*err;
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}
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return sum_sq_err;
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}
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static AVFrame *get_best_frame(AVFilterContext *ctx)
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{
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AVFrame *picref;
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ThumbnailCudaContext *s = ctx->priv;
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int i, j, best_frame_idx = 0;
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int nb_frames = s->n;
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double avg_hist[HIST_SIZE] = {0}, sq_err, min_sq_err = -1;
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// average histogram of the N frames
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for (j = 0; j < FF_ARRAY_ELEMS(avg_hist); j++) {
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for (i = 0; i < nb_frames; i++)
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avg_hist[j] += (double)s->frames[i].histogram[j];
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avg_hist[j] /= nb_frames;
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}
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// find the frame closer to the average using the sum of squared errors
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for (i = 0; i < nb_frames; i++) {
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sq_err = frame_sum_square_err(s->frames[i].histogram, avg_hist);
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if (i == 0 || sq_err < min_sq_err)
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best_frame_idx = i, min_sq_err = sq_err;
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}
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// free and reset everything (except the best frame buffer)
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for (i = 0; i < nb_frames; i++) {
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memset(s->frames[i].histogram, 0, sizeof(s->frames[i].histogram));
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if (i != best_frame_idx)
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av_frame_free(&s->frames[i].buf);
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}
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s->n = 0;
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// raise the chosen one
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picref = s->frames[best_frame_idx].buf;
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av_log(ctx, AV_LOG_INFO, "frame id #%d (pts_time=%f) selected "
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"from a set of %d images\n", best_frame_idx,
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picref->pts * av_q2d(s->tb), nb_frames);
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s->frames[best_frame_idx].buf = NULL;
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return picref;
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}
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static int thumbnail_kernel(AVFilterContext *ctx, CUfunction func, int channels,
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int *histogram, uint8_t *src_dptr, int src_width, int src_height, int src_pitch, int pixel_size)
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{
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int ret;
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ThumbnailCudaContext *s = ctx->priv;
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CudaFunctions *cu = s->hwctx->internal->cuda_dl;
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CUtexObject tex = 0;
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void *args[] = { &tex, &histogram, &src_width, &src_height };
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CUDA_TEXTURE_DESC tex_desc = {
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.filterMode = CU_TR_FILTER_MODE_LINEAR,
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.flags = CU_TRSF_READ_AS_INTEGER,
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};
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CUDA_RESOURCE_DESC res_desc = {
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.resType = CU_RESOURCE_TYPE_PITCH2D,
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.res.pitch2D.format = pixel_size == 1 ?
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CU_AD_FORMAT_UNSIGNED_INT8 :
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CU_AD_FORMAT_UNSIGNED_INT16,
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.res.pitch2D.numChannels = channels,
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.res.pitch2D.width = src_width,
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.res.pitch2D.height = src_height,
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.res.pitch2D.pitchInBytes = src_pitch,
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.res.pitch2D.devPtr = (CUdeviceptr)src_dptr,
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};
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ret = CHECK_CU(cu->cuTexObjectCreate(&tex, &res_desc, &tex_desc, NULL));
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if (ret < 0)
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goto exit;
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ret = CHECK_CU(cu->cuLaunchKernel(func,
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DIV_UP(src_width, BLOCKX), DIV_UP(src_height, BLOCKY), 1,
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BLOCKX, BLOCKY, 1, 0, s->cu_stream, args, NULL));
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exit:
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if (tex)
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CHECK_CU(cu->cuTexObjectDestroy(tex));
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return ret;
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}
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static int thumbnail(AVFilterContext *ctx, int *histogram, AVFrame *in)
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{
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AVHWFramesContext *in_frames_ctx = (AVHWFramesContext*)in->hw_frames_ctx->data;
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ThumbnailCudaContext *s = ctx->priv;
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switch (in_frames_ctx->sw_format) {
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case AV_PIX_FMT_NV12:
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thumbnail_kernel(ctx, s->cu_func_uchar, 1,
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histogram, in->data[0], in->width, in->height, in->linesize[0], 1);
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thumbnail_kernel(ctx, s->cu_func_uchar2, 2,
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histogram + 256, in->data[1], in->width / 2, in->height / 2, in->linesize[1], 1);
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break;
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case AV_PIX_FMT_YUV420P:
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thumbnail_kernel(ctx, s->cu_func_uchar, 1,
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histogram, in->data[0], in->width, in->height, in->linesize[0], 1);
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thumbnail_kernel(ctx, s->cu_func_uchar, 1,
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histogram + 256, in->data[1], in->width / 2, in->height / 2, in->linesize[1], 1);
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thumbnail_kernel(ctx, s->cu_func_uchar, 1,
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histogram + 512, in->data[2], in->width / 2, in->height / 2, in->linesize[2], 1);
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break;
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case AV_PIX_FMT_YUV444P:
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thumbnail_kernel(ctx, s->cu_func_uchar, 1,
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histogram, in->data[0], in->width, in->height, in->linesize[0], 1);
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thumbnail_kernel(ctx, s->cu_func_uchar, 1,
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histogram + 256, in->data[1], in->width, in->height, in->linesize[1], 1);
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thumbnail_kernel(ctx, s->cu_func_uchar, 1,
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histogram + 512, in->data[2], in->width, in->height, in->linesize[2], 1);
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break;
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case AV_PIX_FMT_P010LE:
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case AV_PIX_FMT_P016LE:
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thumbnail_kernel(ctx, s->cu_func_ushort, 1,
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histogram, in->data[0], in->width, in->height, in->linesize[0], 2);
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thumbnail_kernel(ctx, s->cu_func_ushort2, 2,
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histogram + 256, in->data[1], in->width / 2, in->height / 2, in->linesize[1], 2);
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break;
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case AV_PIX_FMT_YUV444P16:
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thumbnail_kernel(ctx, s->cu_func_ushort2, 1,
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histogram, in->data[0], in->width, in->height, in->linesize[0], 2);
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thumbnail_kernel(ctx, s->cu_func_ushort2, 1,
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histogram + 256, in->data[1], in->width, in->height, in->linesize[1], 2);
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thumbnail_kernel(ctx, s->cu_func_ushort2, 1,
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histogram + 512, in->data[2], in->width, in->height, in->linesize[2], 2);
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break;
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default:
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return AVERROR_BUG;
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}
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return 0;
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}
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static int filter_frame(AVFilterLink *inlink, AVFrame *frame)
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{
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AVFilterContext *ctx = inlink->dst;
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ThumbnailCudaContext *s = ctx->priv;
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CudaFunctions *cu = s->hwctx->internal->cuda_dl;
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AVFilterLink *outlink = ctx->outputs[0];
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int *hist = s->frames[s->n].histogram;
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AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)s->hw_frames_ctx->data;
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CUcontext dummy;
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CUDA_MEMCPY2D cpy = { 0 };
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int ret = 0;
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// keep a reference of each frame
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s->frames[s->n].buf = frame;
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ret = CHECK_CU(cu->cuCtxPushCurrent(s->hwctx->cuda_ctx));
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if (ret < 0)
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return ret;
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CHECK_CU(cu->cuMemsetD8Async(s->data, 0, HIST_SIZE * sizeof(int), s->cu_stream));
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thumbnail(ctx, (int*)s->data, frame);
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cpy.srcMemoryType = CU_MEMORYTYPE_DEVICE;
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cpy.dstMemoryType = CU_MEMORYTYPE_HOST;
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cpy.srcDevice = s->data;
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cpy.dstHost = hist;
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cpy.srcPitch = HIST_SIZE * sizeof(int);
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cpy.dstPitch = HIST_SIZE * sizeof(int);
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cpy.WidthInBytes = HIST_SIZE * sizeof(int);
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cpy.Height = 1;
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ret = CHECK_CU(cu->cuMemcpy2DAsync(&cpy, s->cu_stream));
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if (ret < 0)
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return ret;
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if (hw_frames_ctx->sw_format == AV_PIX_FMT_NV12 || hw_frames_ctx->sw_format == AV_PIX_FMT_YUV420P ||
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hw_frames_ctx->sw_format == AV_PIX_FMT_P010LE || hw_frames_ctx->sw_format == AV_PIX_FMT_P016LE)
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{
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int i;
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for (i = 256; i < HIST_SIZE; i++)
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hist[i] = 4 * hist[i];
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}
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CHECK_CU(cu->cuCtxPopCurrent(&dummy));
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if (ret < 0)
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return ret;
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// no selection until the buffer of N frames is filled up
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s->n++;
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if (s->n < s->n_frames)
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return 0;
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return ff_filter_frame(outlink, get_best_frame(ctx));
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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ThumbnailCudaContext *s = ctx->priv;
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if (s->hwctx) {
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CudaFunctions *cu = s->hwctx->internal->cuda_dl;
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if (s->data) {
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CHECK_CU(cu->cuMemFree(s->data));
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s->data = 0;
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}
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if (s->cu_module) {
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CHECK_CU(cu->cuModuleUnload(s->cu_module));
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s->cu_module = NULL;
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}
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}
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if (s->frames) {
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for (int i = 0; i < s->n_frames && s->frames[i].buf; i++)
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av_frame_free(&s->frames[i].buf);
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av_freep(&s->frames);
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}
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}
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static int request_frame(AVFilterLink *link)
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{
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AVFilterContext *ctx = link->src;
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ThumbnailCudaContext *s = ctx->priv;
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int ret = ff_request_frame(ctx->inputs[0]);
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if (ret == AVERROR_EOF && s->n) {
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ret = ff_filter_frame(link, get_best_frame(ctx));
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if (ret < 0)
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return ret;
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ret = AVERROR_EOF;
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}
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if (ret < 0)
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return ret;
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return 0;
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}
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static int format_is_supported(enum AVPixelFormat fmt)
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{
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int i;
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for (i = 0; i < FF_ARRAY_ELEMS(supported_formats); i++)
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if (supported_formats[i] == fmt)
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return 1;
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return 0;
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}
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static int config_props(AVFilterLink *inlink)
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{
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AVFilterContext *ctx = inlink->dst;
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ThumbnailCudaContext *s = ctx->priv;
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AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)inlink->hw_frames_ctx->data;
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AVCUDADeviceContext *device_hwctx = hw_frames_ctx->device_ctx->hwctx;
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CUcontext dummy, cuda_ctx = device_hwctx->cuda_ctx;
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CudaFunctions *cu = device_hwctx->internal->cuda_dl;
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int ret;
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extern const unsigned char ff_vf_thumbnail_cuda_ptx_data[];
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extern const unsigned int ff_vf_thumbnail_cuda_ptx_len;
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s->hwctx = device_hwctx;
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s->cu_stream = s->hwctx->stream;
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ret = CHECK_CU(cu->cuCtxPushCurrent(cuda_ctx));
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if (ret < 0)
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return ret;
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ret = ff_cuda_load_module(ctx, device_hwctx, &s->cu_module, ff_vf_thumbnail_cuda_ptx_data, ff_vf_thumbnail_cuda_ptx_len);
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if (ret < 0)
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return ret;
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ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func_uchar, s->cu_module, "Thumbnail_uchar"));
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if (ret < 0)
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return ret;
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ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func_uchar2, s->cu_module, "Thumbnail_uchar2"));
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if (ret < 0)
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return ret;
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ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func_ushort, s->cu_module, "Thumbnail_ushort"));
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if (ret < 0)
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return ret;
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ret = CHECK_CU(cu->cuModuleGetFunction(&s->cu_func_ushort2, s->cu_module, "Thumbnail_ushort2"));
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if (ret < 0)
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return ret;
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ret = CHECK_CU(cu->cuMemAlloc(&s->data, HIST_SIZE * sizeof(int)));
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if (ret < 0)
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return ret;
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CHECK_CU(cu->cuCtxPopCurrent(&dummy));
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s->hw_frames_ctx = ctx->inputs[0]->hw_frames_ctx;
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ctx->outputs[0]->hw_frames_ctx = av_buffer_ref(s->hw_frames_ctx);
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if (!ctx->outputs[0]->hw_frames_ctx)
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return AVERROR(ENOMEM);
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s->tb = inlink->time_base;
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if (!format_is_supported(hw_frames_ctx->sw_format)) {
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av_log(ctx, AV_LOG_ERROR, "Unsupported input format: %s\n", av_get_pix_fmt_name(hw_frames_ctx->sw_format));
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return AVERROR(ENOSYS);
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}
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return 0;
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}
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static const AVFilterPad thumbnail_cuda_inputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.config_props = config_props,
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.filter_frame = filter_frame,
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},
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};
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static const AVFilterPad thumbnail_cuda_outputs[] = {
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{
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.name = "default",
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.type = AVMEDIA_TYPE_VIDEO,
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.request_frame = request_frame,
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},
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};
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const AVFilter ff_vf_thumbnail_cuda = {
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.name = "thumbnail_cuda",
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.description = NULL_IF_CONFIG_SMALL("Select the most representative frame in a given sequence of consecutive frames."),
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.priv_size = sizeof(ThumbnailCudaContext),
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.init = init,
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.uninit = uninit,
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FILTER_INPUTS(thumbnail_cuda_inputs),
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FILTER_OUTPUTS(thumbnail_cuda_outputs),
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FILTER_SINGLE_PIXFMT(AV_PIX_FMT_CUDA),
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.priv_class = &thumbnail_cuda_class,
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.flags_internal = FF_FILTER_FLAG_HWFRAME_AWARE,
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};
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