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avfilter: add comments for duplicate line
comment about the looks like a duplicate line. but that is used to reason x is expressed from y Suggested-by: Paul B Mahol Suggested-by: Michael Niedermayer Signed-off-by: Steven Liu <lq@chinaffmpeg.org>
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@ -262,6 +262,7 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
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NAN : frame->pkt_pos;
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NAN : frame->pkt_pos;
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
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s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
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/* It is necessary if x is expressed from y */
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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normalize_double(&s->x, s->var_values[VAR_X]);
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normalize_double(&s->x, s->var_values[VAR_X]);
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@ -1390,6 +1390,7 @@ static int draw_text(AVFilterContext *ctx, AVFrame *frame,
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s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng);
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s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng);
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s->y = s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, &s->prng);
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s->y = s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, &s->prng);
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/* It is necessary if x is expressed from y */
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s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng);
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s->x = s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, &s->prng);
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update_alpha(s);
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update_alpha(s);
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@ -149,6 +149,7 @@ static void eval_expr(AVFilterContext *ctx)
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
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s->var_values[VAR_Y] = av_expr_eval(s->y_pexpr, s->var_values, NULL);
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/* It is necessary if x is expressed from y */
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->var_values[VAR_X] = av_expr_eval(s->x_pexpr, s->var_values, NULL);
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s->x = normalize_xy(s->var_values[VAR_X], s->hsub);
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s->x = normalize_xy(s->var_values[VAR_X], s->hsub);
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s->y = normalize_xy(s->var_values[VAR_Y], s->vsub);
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s->y = normalize_xy(s->var_values[VAR_Y], s->vsub);
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