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Rev | Author | Line No. | Line |
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6148 | serge | 1 | /* |
2 | * Copyright (C) 2012 British Broadcasting Corporation, All Rights Reserved |
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3 | * Author of de-interlace algorithm: Jim Easterbrook for BBC R&D |
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4 | * Based on the process described by Martin Weston for BBC R&D |
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5 | * Author of FFmpeg filter: Mark Himsley for BBC Broadcast Systems Development |
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6 | * |
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7 | * This file is part of FFmpeg. |
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8 | * |
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9 | * FFmpeg is free software; you can redistribute it and/or |
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10 | * modify it under the terms of the GNU Lesser General Public |
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11 | * License as published by the Free Software Foundation; either |
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12 | * version 2.1 of the License, or (at your option) any later version. |
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13 | * |
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14 | * FFmpeg is distributed in the hope that it will be useful, |
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15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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17 | * Lesser General Public License for more details. |
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18 | * |
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19 | * You should have received a copy of the GNU Lesser General Public |
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20 | * License along with FFmpeg; if not, write to the Free Software |
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21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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22 | */ |
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23 | |||
24 | #include "libavutil/common.h" |
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25 | #include "libavutil/imgutils.h" |
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26 | #include "libavutil/opt.h" |
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27 | #include "libavutil/pixdesc.h" |
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28 | #include "avfilter.h" |
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29 | #include "formats.h" |
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30 | #include "internal.h" |
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31 | #include "video.h" |
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32 | |||
33 | typedef struct W3FDIFContext { |
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34 | const AVClass *class; |
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35 | int filter; ///< 0 is simple, 1 is more complex |
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36 | int deint; ///< which frames to deinterlace |
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37 | int linesize[4]; ///< bytes of pixel data per line for each plane |
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38 | int planeheight[4]; ///< height of each plane |
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39 | int field; ///< which field are we on, 0 or 1 |
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40 | int eof; |
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41 | int nb_planes; |
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42 | AVFrame *prev, *cur, *next; ///< previous, current, next frames |
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43 | int32_t *work_line; ///< line we are calculating |
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44 | } W3FDIFContext; |
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45 | |||
46 | #define OFFSET(x) offsetof(W3FDIFContext, x) |
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47 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
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48 | #define CONST(name, help, val, unit) { name, help, 0, AV_OPT_TYPE_CONST, {.i64=val}, 0, 0, FLAGS, unit } |
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49 | |||
50 | static const AVOption w3fdif_options[] = { |
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51 | { "filter", "specify the filter", OFFSET(filter), AV_OPT_TYPE_INT, {.i64=1}, 0, 1, FLAGS, "filter" }, |
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52 | CONST("simple", NULL, 0, "filter"), |
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53 | CONST("complex", NULL, 1, "filter"), |
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54 | { "deint", "specify which frames to deinterlace", OFFSET(deint), AV_OPT_TYPE_INT, {.i64=0}, 0, 1, FLAGS, "deint" }, |
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55 | CONST("all", "deinterlace all frames", 0, "deint"), |
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56 | CONST("interlaced", "only deinterlace frames marked as interlaced", 1, "deint"), |
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57 | { NULL } |
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58 | }; |
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59 | |||
60 | AVFILTER_DEFINE_CLASS(w3fdif); |
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61 | |||
62 | static int query_formats(AVFilterContext *ctx) |
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63 | { |
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64 | static const enum AVPixelFormat pix_fmts[] = { |
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65 | AV_PIX_FMT_YUV410P, AV_PIX_FMT_YUV411P, |
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66 | AV_PIX_FMT_YUV420P, AV_PIX_FMT_YUV422P, |
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67 | AV_PIX_FMT_YUV440P, AV_PIX_FMT_YUV444P, |
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68 | AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ440P, |
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69 | AV_PIX_FMT_YUVJ422P, AV_PIX_FMT_YUVJ420P, |
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70 | AV_PIX_FMT_YUVJ411P, |
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71 | AV_PIX_FMT_YUVA420P, AV_PIX_FMT_YUVA422P, AV_PIX_FMT_YUVA444P, |
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72 | AV_PIX_FMT_GBRP, AV_PIX_FMT_GBRAP, |
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73 | AV_PIX_FMT_GRAY8, |
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74 | AV_PIX_FMT_NONE |
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75 | }; |
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76 | |||
77 | ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
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78 | |||
79 | return 0; |
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80 | } |
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81 | |||
82 | static int config_input(AVFilterLink *inlink) |
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83 | { |
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84 | W3FDIFContext *s = inlink->dst->priv; |
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85 | const AVPixFmtDescriptor *desc = av_pix_fmt_desc_get(inlink->format); |
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86 | int ret; |
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87 | |||
88 | if ((ret = av_image_fill_linesizes(s->linesize, inlink->format, inlink->w)) < 0) |
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89 | return ret; |
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90 | |||
91 | s->planeheight[1] = s->planeheight[2] = FF_CEIL_RSHIFT(inlink->h, desc->log2_chroma_h); |
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92 | s->planeheight[0] = s->planeheight[3] = inlink->h; |
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93 | |||
94 | s->nb_planes = av_pix_fmt_count_planes(inlink->format); |
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95 | s->work_line = av_calloc(s->linesize[0], sizeof(*s->work_line)); |
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96 | if (!s->work_line) |
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97 | return AVERROR(ENOMEM); |
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98 | |||
99 | return 0; |
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100 | } |
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101 | |||
102 | static int config_output(AVFilterLink *outlink) |
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103 | { |
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104 | AVFilterLink *inlink = outlink->src->inputs[0]; |
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105 | |||
106 | outlink->time_base.num = inlink->time_base.num; |
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107 | outlink->time_base.den = inlink->time_base.den * 2; |
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108 | outlink->frame_rate.num = inlink->frame_rate.num * 2; |
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109 | outlink->frame_rate.den = inlink->frame_rate.den; |
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110 | outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP; |
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111 | |||
112 | return 0; |
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113 | } |
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114 | |||
115 | /* |
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116 | * Filter coefficients from PH-2071, scaled by 256 * 256. |
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117 | * Each set of coefficients has a set for low-frequencies and high-frequencies. |
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118 | * n_coef_lf[] and n_coef_hf[] are the number of coefs for simple and more-complex. |
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119 | * It is important for later that n_coef_lf[] is even and n_coef_hf[] is odd. |
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120 | * coef_lf[][] and coef_hf[][] are the coefficients for low-frequencies |
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121 | * and high-frequencies for simple and more-complex mode. |
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122 | */ |
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123 | static const int8_t n_coef_lf[2] = { 2, 4 }; |
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124 | static const int32_t coef_lf[2][4] = {{ 32768, 32768, 0, 0}, |
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125 | { -1704, 34472, 34472, -1704}}; |
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126 | static const int8_t n_coef_hf[2] = { 3, 5 }; |
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127 | static const int32_t coef_hf[2][5] = {{ -4096, 8192, -4096, 0, 0}, |
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128 | { 2032, -7602, 11140, -7602, 2032}}; |
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129 | |||
130 | static void deinterlace_plane(AVFilterContext *ctx, AVFrame *out, |
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131 | const AVFrame *cur, const AVFrame *adj, |
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132 | const int filter, const int plane) |
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133 | { |
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134 | W3FDIFContext *s = ctx->priv; |
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135 | uint8_t *in_line, *in_lines_cur[5], *in_lines_adj[5]; |
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136 | uint8_t *out_line, *out_pixel; |
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137 | int32_t *work_line, *work_pixel; |
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138 | uint8_t *cur_data = cur->data[plane]; |
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139 | uint8_t *adj_data = adj->data[plane]; |
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140 | uint8_t *dst_data = out->data[plane]; |
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141 | const int linesize = s->linesize[plane]; |
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142 | const int height = s->planeheight[plane]; |
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143 | const int cur_line_stride = cur->linesize[plane]; |
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144 | const int adj_line_stride = adj->linesize[plane]; |
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145 | const int dst_line_stride = out->linesize[plane]; |
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146 | int i, j, y_in, y_out; |
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147 | |||
148 | /* copy unchanged the lines of the field */ |
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149 | y_out = s->field == cur->top_field_first; |
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150 | |||
151 | in_line = cur_data + (y_out * cur_line_stride); |
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152 | out_line = dst_data + (y_out * dst_line_stride); |
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153 | |||
154 | while (y_out < height) { |
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155 | memcpy(out_line, in_line, linesize); |
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156 | y_out += 2; |
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157 | in_line += cur_line_stride * 2; |
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158 | out_line += dst_line_stride * 2; |
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159 | } |
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160 | |||
161 | /* interpolate other lines of the field */ |
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162 | y_out = s->field != cur->top_field_first; |
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163 | |||
164 | out_line = dst_data + (y_out * dst_line_stride); |
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165 | |||
166 | while (y_out < height) { |
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167 | /* clear workspace */ |
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168 | memset(s->work_line, 0, sizeof(*s->work_line) * linesize); |
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169 | |||
170 | /* get low vertical frequencies from current field */ |
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171 | for (j = 0; j < n_coef_lf[filter]; j++) { |
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172 | y_in = (y_out + 1) + (j * 2) - n_coef_lf[filter]; |
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173 | |||
174 | while (y_in < 0) |
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175 | y_in += 2; |
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176 | while (y_in >= height) |
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177 | y_in -= 2; |
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178 | |||
179 | in_lines_cur[j] = cur_data + (y_in * cur_line_stride); |
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180 | } |
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181 | |||
182 | work_line = s->work_line; |
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183 | switch (n_coef_lf[filter]) { |
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184 | case 2: |
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185 | for (i = 0; i < linesize; i++) { |
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186 | *work_line += *in_lines_cur[0]++ * coef_lf[filter][0]; |
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187 | *work_line++ += *in_lines_cur[1]++ * coef_lf[filter][1]; |
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188 | } |
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189 | break; |
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190 | case 4: |
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191 | for (i = 0; i < linesize; i++) { |
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192 | *work_line += *in_lines_cur[0]++ * coef_lf[filter][0]; |
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193 | *work_line += *in_lines_cur[1]++ * coef_lf[filter][1]; |
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194 | *work_line += *in_lines_cur[2]++ * coef_lf[filter][2]; |
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195 | *work_line++ += *in_lines_cur[3]++ * coef_lf[filter][3]; |
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196 | } |
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197 | } |
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198 | |||
199 | /* get high vertical frequencies from adjacent fields */ |
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200 | for (j = 0; j < n_coef_hf[filter]; j++) { |
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201 | y_in = (y_out + 1) + (j * 2) - n_coef_hf[filter]; |
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202 | |||
203 | while (y_in < 0) |
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204 | y_in += 2; |
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205 | while (y_in >= height) |
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206 | y_in -= 2; |
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207 | |||
208 | in_lines_cur[j] = cur_data + (y_in * cur_line_stride); |
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209 | in_lines_adj[j] = adj_data + (y_in * adj_line_stride); |
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210 | } |
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211 | |||
212 | work_line = s->work_line; |
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213 | switch (n_coef_hf[filter]) { |
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214 | case 3: |
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215 | for (i = 0; i < linesize; i++) { |
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216 | *work_line += *in_lines_cur[0]++ * coef_hf[filter][0]; |
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217 | *work_line += *in_lines_adj[0]++ * coef_hf[filter][0]; |
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218 | *work_line += *in_lines_cur[1]++ * coef_hf[filter][1]; |
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219 | *work_line += *in_lines_adj[1]++ * coef_hf[filter][1]; |
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220 | *work_line += *in_lines_cur[2]++ * coef_hf[filter][2]; |
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221 | *work_line++ += *in_lines_adj[2]++ * coef_hf[filter][2]; |
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222 | } |
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223 | break; |
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224 | case 5: |
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225 | for (i = 0; i < linesize; i++) { |
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226 | *work_line += *in_lines_cur[0]++ * coef_hf[filter][0]; |
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227 | *work_line += *in_lines_adj[0]++ * coef_hf[filter][0]; |
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228 | *work_line += *in_lines_cur[1]++ * coef_hf[filter][1]; |
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229 | *work_line += *in_lines_adj[1]++ * coef_hf[filter][1]; |
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230 | *work_line += *in_lines_cur[2]++ * coef_hf[filter][2]; |
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231 | *work_line += *in_lines_adj[2]++ * coef_hf[filter][2]; |
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232 | *work_line += *in_lines_cur[3]++ * coef_hf[filter][3]; |
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233 | *work_line += *in_lines_adj[3]++ * coef_hf[filter][3]; |
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234 | *work_line += *in_lines_cur[4]++ * coef_hf[filter][4]; |
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235 | *work_line++ += *in_lines_adj[4]++ * coef_hf[filter][4]; |
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236 | } |
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237 | } |
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238 | |||
239 | /* save scaled result to the output frame, scaling down by 256 * 256 */ |
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240 | work_pixel = s->work_line; |
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241 | out_pixel = out_line; |
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242 | |||
243 | for (j = 0; j < linesize; j++, out_pixel++, work_pixel++) |
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244 | *out_pixel = av_clip(*work_pixel, 0, 255 * 256 * 256) >> 16; |
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245 | |||
246 | /* move on to next line */ |
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247 | y_out += 2; |
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248 | out_line += dst_line_stride * 2; |
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249 | } |
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250 | } |
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251 | |||
252 | static int filter(AVFilterContext *ctx, int is_second) |
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253 | { |
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254 | W3FDIFContext *s = ctx->priv; |
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255 | AVFilterLink *outlink = ctx->outputs[0]; |
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256 | AVFrame *out, *adj; |
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257 | int plane; |
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258 | |||
259 | out = ff_get_video_buffer(outlink, outlink->w, outlink->h); |
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260 | if (!out) |
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261 | return AVERROR(ENOMEM); |
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262 | av_frame_copy_props(out, s->cur); |
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263 | out->interlaced_frame = 0; |
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264 | |||
265 | if (!is_second) { |
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266 | if (out->pts != AV_NOPTS_VALUE) |
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267 | out->pts *= 2; |
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268 | } else { |
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269 | int64_t cur_pts = s->cur->pts; |
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270 | int64_t next_pts = s->next->pts; |
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271 | |||
272 | if (next_pts != AV_NOPTS_VALUE && cur_pts != AV_NOPTS_VALUE) { |
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273 | out->pts = cur_pts + next_pts; |
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274 | } else { |
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275 | out->pts = AV_NOPTS_VALUE; |
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276 | } |
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277 | } |
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278 | |||
279 | adj = s->field ? s->next : s->prev; |
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280 | for (plane = 0; plane < s->nb_planes; plane++) |
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281 | deinterlace_plane(ctx, out, s->cur, adj, s->filter, plane); |
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282 | |||
283 | s->field = !s->field; |
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284 | |||
285 | return ff_filter_frame(outlink, out); |
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286 | } |
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287 | |||
288 | static int filter_frame(AVFilterLink *inlink, AVFrame *frame) |
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289 | { |
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290 | AVFilterContext *ctx = inlink->dst; |
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291 | W3FDIFContext *s = ctx->priv; |
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292 | int ret; |
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293 | |||
294 | av_frame_free(&s->prev); |
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295 | s->prev = s->cur; |
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296 | s->cur = s->next; |
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297 | s->next = frame; |
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298 | |||
299 | if (!s->cur) { |
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300 | s->cur = av_frame_clone(s->next); |
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301 | if (!s->cur) |
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302 | return AVERROR(ENOMEM); |
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303 | } |
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304 | |||
305 | if ((s->deint && !s->cur->interlaced_frame) || ctx->is_disabled) { |
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306 | AVFrame *out = av_frame_clone(s->cur); |
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307 | if (!out) |
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308 | return AVERROR(ENOMEM); |
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309 | |||
310 | av_frame_free(&s->prev); |
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311 | if (out->pts != AV_NOPTS_VALUE) |
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312 | out->pts *= 2; |
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313 | return ff_filter_frame(ctx->outputs[0], out); |
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314 | } |
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315 | |||
316 | if (!s->prev) |
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317 | return 0; |
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318 | |||
319 | ret = filter(ctx, 0); |
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320 | if (ret < 0) |
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321 | return ret; |
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322 | |||
323 | return filter(ctx, 1); |
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324 | } |
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325 | |||
326 | static int request_frame(AVFilterLink *outlink) |
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327 | { |
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328 | AVFilterContext *ctx = outlink->src; |
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329 | W3FDIFContext *s = ctx->priv; |
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330 | |||
331 | do { |
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332 | int ret; |
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333 | |||
334 | if (s->eof) |
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335 | return AVERROR_EOF; |
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336 | |||
337 | ret = ff_request_frame(ctx->inputs[0]); |
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338 | |||
339 | if (ret == AVERROR_EOF && s->cur) { |
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340 | AVFrame *next = av_frame_clone(s->next); |
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341 | if (!next) |
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342 | return AVERROR(ENOMEM); |
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343 | next->pts = s->next->pts * 2 - s->cur->pts; |
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344 | filter_frame(ctx->inputs[0], next); |
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345 | s->eof = 1; |
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346 | } else if (ret < 0) { |
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347 | return ret; |
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348 | } |
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349 | } while (!s->cur); |
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350 | |||
351 | return 0; |
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352 | } |
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353 | |||
354 | static av_cold void uninit(AVFilterContext *ctx) |
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355 | { |
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356 | W3FDIFContext *s = ctx->priv; |
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357 | |||
358 | av_frame_free(&s->prev); |
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359 | av_frame_free(&s->cur ); |
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360 | av_frame_free(&s->next); |
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361 | av_freep(&s->work_line); |
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362 | } |
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363 | |||
364 | static const AVFilterPad w3fdif_inputs[] = { |
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365 | { |
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366 | .name = "default", |
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367 | .type = AVMEDIA_TYPE_VIDEO, |
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368 | .filter_frame = filter_frame, |
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369 | .config_props = config_input, |
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370 | }, |
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371 | { NULL } |
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372 | }; |
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373 | |||
374 | static const AVFilterPad w3fdif_outputs[] = { |
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375 | { |
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376 | .name = "default", |
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377 | .type = AVMEDIA_TYPE_VIDEO, |
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378 | .config_props = config_output, |
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379 | .request_frame = request_frame, |
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380 | }, |
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381 | { NULL } |
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382 | }; |
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383 | |||
384 | AVFilter avfilter_vf_w3fdif = { |
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385 | .name = "w3fdif", |
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386 | .description = NULL_IF_CONFIG_SMALL("Apply Martin Weston three field deinterlace."), |
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387 | .priv_size = sizeof(W3FDIFContext), |
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388 | .priv_class = &w3fdif_class, |
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389 | .uninit = uninit, |
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390 | .query_formats = query_formats, |
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391 | .inputs = w3fdif_inputs, |
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392 | .outputs = w3fdif_outputs, |
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393 | .flags = AVFILTER_FLAG_SUPPORT_TIMELINE_INTERNAL, |
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394 | };>>>>>>>>>>>>>>>>>>>>>> |