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450 lines
14 KiB
450 lines
14 KiB
/* |
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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/mem.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 "filters.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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ret = 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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FilterLink *inl = ff_filter_link(inlink); |
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FilterLink *outl = ff_filter_link(ctx->outputs[0]); |
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ThumbnailCudaContext *s = ctx->priv; |
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AVHWFramesContext *hw_frames_ctx = (AVHWFramesContext*)inl->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 = inl->hw_frames_ctx; |
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outl->hw_frames_ctx = av_buffer_ref(s->hw_frames_ctx); |
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if (!outl->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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