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avutil/half2float: move non-inline init code out of header

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Timo Rothenpieler
2022-08-10 01:53:10 +02:00
parent f3fb528cd5
commit 6dc79f1d04
11 changed files with 166 additions and 86 deletions
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36
libavutil/float2half.h
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@@ -26,41 +26,9 @@ typedef struct Float2HalfTables {
uint8_t shifttable[512];
} Float2HalfTables;
static void init_float2half_tables(Float2HalfTables *t)
{
for (int i = 0; i < 256; i++) {
int e = i - 127;
void ff_init_float2half_tables(Float2HalfTables *t);
if (e < -24) { // Very small numbers map to zero
t->basetable[i|0x000] = 0x0000;
t->basetable[i|0x100] = 0x8000;
t->shifttable[i|0x000] = 24;
t->shifttable[i|0x100] = 24;
} else if (e < -14) { // Small numbers map to denorms
t->basetable[i|0x000] = (0x0400>>(-e-14));
t->basetable[i|0x100] = (0x0400>>(-e-14)) | 0x8000;
t->shifttable[i|0x000] = -e-1;
t->shifttable[i|0x100] = -e-1;
} else if (e <= 15) { // Normal numbers just lose precision
t->basetable[i|0x000] = ((e + 15) << 10);
t->basetable[i|0x100] = ((e + 15) << 10) | 0x8000;
t->shifttable[i|0x000] = 13;
t->shifttable[i|0x100] = 13;
} else if (e < 128) { // Large numbers map to Infinity
t->basetable[i|0x000] = 0x7C00;
t->basetable[i|0x100] = 0xFC00;
t->shifttable[i|0x000] = 24;
t->shifttable[i|0x100] = 24;
} else { // Infinity and NaN's stay Infinity and NaN's
t->basetable[i|0x000] = 0x7C00;
t->basetable[i|0x100] = 0xFC00;
t->shifttable[i|0x000] = 13;
t->shifttable[i|0x100] = 13;
}
}
}
static uint16_t float2half(uint32_t f, const Float2HalfTables *t)
static inline uint16_t float2half(uint32_t f, const Float2HalfTables *t)
{
uint16_t h;