Revision 8163c870
| libavformat/utils.c | ||
|---|---|---|
| 38 | 38 |
return LIBAVFORMAT_VERSION_INT; |
| 39 | 39 |
} |
| 40 | 40 |
|
| 41 |
static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den); |
|
| 42 |
static void av_frac_add(AVFrac *f, int64_t incr); |
|
| 41 |
/* fraction handling */ |
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| 42 |
|
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| 43 |
/** |
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| 44 |
* f = val + (num / den) + 0.5. |
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| 45 |
* |
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| 46 |
* 'num' is normalized so that it is such as 0 <= num < den. |
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| 47 |
* |
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| 48 |
* @param f fractional number |
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| 49 |
* @param val integer value |
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| 50 |
* @param num must be >= 0 |
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| 51 |
* @param den must be >= 1 |
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| 52 |
*/ |
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| 53 |
static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den) |
|
| 54 |
{
|
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| 55 |
num += (den >> 1); |
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| 56 |
if (num >= den) {
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| 57 |
val += num / den; |
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| 58 |
num = num % den; |
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| 59 |
} |
|
| 60 |
f->val = val; |
|
| 61 |
f->num = num; |
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| 62 |
f->den = den; |
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| 63 |
} |
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| 64 |
|
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| 65 |
/** |
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| 66 |
* Fractional addition to f: f = f + (incr / f->den). |
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| 67 |
* |
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| 68 |
* @param f fractional number |
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| 69 |
* @param incr increment, can be positive or negative |
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| 70 |
*/ |
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| 71 |
static void av_frac_add(AVFrac *f, int64_t incr) |
|
| 72 |
{
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| 73 |
int64_t num, den; |
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| 74 |
|
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| 75 |
num = f->num + incr; |
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den = f->den; |
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| 77 |
if (num < 0) {
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| 78 |
f->val += num / den; |
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| 79 |
num = num % den; |
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| 80 |
if (num < 0) {
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| 81 |
num += den; |
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| 82 |
f->val--; |
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| 83 |
} |
|
| 84 |
} else if (num >= den) {
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|
| 85 |
f->val += num / den; |
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| 86 |
num = num % den; |
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| 87 |
} |
|
| 88 |
f->num = num; |
|
| 89 |
} |
|
| 43 | 90 |
|
| 44 | 91 |
/** head of registered input format linked list */ |
| 45 | 92 |
AVInputFormat *first_iformat = NULL; |
| ... | ... | |
| 3171 | 3218 |
if(gcd>1) |
| 3172 | 3219 |
av_log(NULL, AV_LOG_DEBUG, "st:%d removing common factor %d from timebase\n", s->index, gcd); |
| 3173 | 3220 |
} |
| 3174 |
|
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| 3175 |
/* fraction handling */ |
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| 3176 |
|
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| 3177 |
/** |
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| 3178 |
* f = val + (num / den) + 0.5. |
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| 3179 |
* |
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| 3180 |
* 'num' is normalized so that it is such as 0 <= num < den. |
|
| 3181 |
* |
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| 3182 |
* @param f fractional number |
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| 3183 |
* @param val integer value |
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| 3184 |
* @param num must be >= 0 |
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| 3185 |
* @param den must be >= 1 |
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| 3186 |
*/ |
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| 3187 |
static void av_frac_init(AVFrac *f, int64_t val, int64_t num, int64_t den) |
|
| 3188 |
{
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| 3189 |
num += (den >> 1); |
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| 3190 |
if (num >= den) {
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| 3191 |
val += num / den; |
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| 3192 |
num = num % den; |
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| 3193 |
} |
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| 3194 |
f->val = val; |
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| 3195 |
f->num = num; |
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| 3196 |
f->den = den; |
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| 3197 |
} |
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| 3198 |
|
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| 3199 |
/** |
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| 3200 |
* Fractional addition to f: f = f + (incr / f->den). |
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| 3201 |
* |
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| 3202 |
* @param f fractional number |
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| 3203 |
* @param incr increment, can be positive or negative |
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| 3204 |
*/ |
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| 3205 |
static void av_frac_add(AVFrac *f, int64_t incr) |
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| 3206 |
{
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| 3207 |
int64_t num, den; |
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| 3208 |
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| 3209 |
num = f->num + incr; |
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| 3210 |
den = f->den; |
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| 3211 |
if (num < 0) {
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| 3212 |
f->val += num / den; |
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| 3213 |
num = num % den; |
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| 3214 |
if (num < 0) {
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| 3215 |
num += den; |
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| 3216 |
f->val--; |
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| 3217 |
} |
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| 3218 |
} else if (num >= den) {
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| 3219 |
f->val += num / den; |
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| 3220 |
num = num % den; |
|
| 3221 |
} |
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| 3222 |
f->num = num; |
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| 3223 |
} |
|
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