mirror of https://git.ffmpeg.org/ffmpeg.git
avformat/jacosubdec: clarify code
add comments, rename variables and indent things differently Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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@ -128,28 +128,28 @@ shift_and_ret:
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static int get_shift(unsigned timeres, const char *buf)
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static int get_shift(unsigned timeres, const char *buf)
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{
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{
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int sign = 1;
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int sign = 1;
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int a = 0, b = 0, c = 0, d = 0;
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int h = 0, m = 0, s = 0, d = 0;
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int64_t ret;
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int64_t ret;
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#define SSEP "%*1[.:]"
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#define SSEP "%*1[.:]"
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int n = sscanf(buf, "%d"SSEP"%d"SSEP"%d"SSEP"%d", &a, &b, &c, &d);
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int n = sscanf(buf, "%d"SSEP"%d"SSEP"%d"SSEP"%d", &h, &m, &s, &d);
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#undef SSEP
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#undef SSEP
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if (a == INT_MIN)
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if (h == INT_MIN)
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return 0;
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return 0;
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if (*buf == '-' || a < 0) {
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if (*buf == '-' || h < 0) {
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sign = -1;
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sign = -1;
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a = FFABS(a);
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h = FFABS(h);
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}
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}
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ret = 0;
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ret = 0;
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switch (n) {
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switch (n) {
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case 1: a = 0;
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case 1: h = 0; //clear all in case of a single parameter
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case 2: c = b; b = a; a = 0;
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case 2: s = m; m = h; h = 0; //shift into second subsecondd
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case 3: d = c; c = b; b = a; a = 0;
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case 3: d = s; s = m; m = h; h = 0; //shift into minute second subsecond
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}
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}
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ret = (int64_t)a*3600 + (int64_t)b*60 + c;
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ret = (int64_t)h*3600 + (int64_t)m*60 + s;
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if (FFABS(ret) > (INT64_MAX - FFABS(d)) / timeres)
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if (FFABS(ret) > (INT64_MAX - FFABS(d)) / timeres)
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return 0;
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return 0;
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ret = sign * (ret * timeres + d);
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ret = sign * (ret * timeres + d);
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