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lavfi/crop: restore pos constant, and fix "t" variable misplacement in variable array

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Fix evaluation of expressions containing the t variable.
This commit is contained in:
Stefano Sabatini 2013-04-12 19:15:06 +02:00
parent 9ae9ae10f9
commit 1d86fe6970
2 changed files with 7 additions and 0 deletions
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3
doc/filters.texi
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@ -2213,6 +2213,9 @@ pixel format "yuv422p" @var{hsub} is 2 and @var{vsub} is 1.
@item n
the number of input frame, starting from 0
@item pos
the position in the file of the input frame, NAN if unknown
@item t
timestamp expressed in seconds, NAN if the input timestamp is unknown

4
libavfilter/vf_crop.c
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@ -70,6 +70,7 @@ enum var_name {
VAR_X,
VAR_Y,
VAR_N,
VAR_POS,
VAR_T,
VAR_VARS_NB
};
@ -169,6 +170,7 @@ static int config_input(AVFilterLink *link)
crop->var_values[VAR_OUT_H] = crop->var_values[VAR_OH] = NAN;
crop->var_values[VAR_N] = 0;
crop->var_values[VAR_T] = NAN;
crop->var_values[VAR_POS] = NAN;
av_image_fill_max_pixsteps(crop->max_step, NULL, pix_desc);
crop->hsub = pix_desc->log2_chroma_w;
@ -259,6 +261,8 @@ static int filter_frame(AVFilterLink *link, AVFrame *frame)
crop->var_values[VAR_T] = frame->pts == AV_NOPTS_VALUE ?
NAN : frame->pts * av_q2d(link->time_base);
crop->var_values[VAR_POS] = av_frame_get_pkt_pos(frame) == -1 ?
NAN : av_frame_get_pkt_pos(frame);
crop->var_values[VAR_X] = av_expr_eval(crop->x_pexpr, crop->var_values, NULL);
crop->var_values[VAR_Y] = av_expr_eval(crop->y_pexpr, crop->var_values, NULL);
crop->var_values[VAR_X] = av_expr_eval(crop->x_pexpr, crop->var_values, NULL);