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avfilter/vf_readeia608: factor some constants out

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This commit is contained in:
Paul B Mahol 2019-12-23 20:07:49 +01:00
parent 94682555c6
commit 94ad5d0128
1 changed files with 8 additions and 6 deletions
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14
libavfilter/vf_readeia608.c
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@ -37,8 +37,10 @@
#include "video.h"
#define LAG 25
#define SYNC_MIN 12.f
#define SYNC_MAX 15.f
#define CLOCK_BITSIZE_MIN 0.2f
#define CLOCK_BITSIZE_MAX 1.5f
#define SYNC_BITSIZE_MIN 12.f
#define SYNC_BITSIZE_MAX 15.f
typedef struct LineItem {
int input;
@ -314,8 +316,8 @@ static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
dump_code(ctx, len, nb_line);
if (len < 15 ||
s->code[14].bit != 0 ||
w / (float)s->code[14].size < SYNC_MIN ||
w / (float)s->code[14].size > SYNC_MAX) {
w / (float)s->code[14].size < SYNC_BITSIZE_MIN ||
w / (float)s->code[14].size > SYNC_BITSIZE_MAX) {
return;
}
@ -325,8 +327,8 @@ static void extract_line(AVFilterContext *ctx, AVFrame *in, int w, int nb_line)
bit_size /= 19.f;
for (i = 1; i < 14; i++) {
if (s->code[i].size > bit_size * 1.5f ||
s->code[i].size < bit_size * 0.2f) {
if (s->code[i].size / bit_size > CLOCK_BITSIZE_MAX ||
s->code[i].size / bit_size < CLOCK_BITSIZE_MIN) {
return;
}
}