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avcodec/rangecoder: eliminate main branch from renorm_encoder()

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Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2024-10-16 21:20:42 +02:00
parent 18922f4ae3
commit b2da4c33e3
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GPG Key ID: B18E8928B3948D64
1 changed files with 4 additions and 9 deletions
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13
libavcodec/rangecoder.h
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@ -61,17 +61,12 @@ void ff_build_rac_states(RangeCoder *c, int factor, int max_p);
static inline void renorm_encoder(RangeCoder *c) static inline void renorm_encoder(RangeCoder *c)
{ {
// FIXME: optimize if (c->low - 0xFF01 >= 0x10000 - 0xFF01U) {
if (c->low <= 0xFF00) { int mask = c->low - 0xFF01 >> 31;
*c->bytestream = c->outstanding_byte; *c->bytestream = c->outstanding_byte + 1 + mask;
c->bytestream += c->outstanding_byte >= 0; c->bytestream += c->outstanding_byte >= 0;
for (; c->outstanding_count; c->outstanding_count--) for (; c->outstanding_count; c->outstanding_count--)
*c->bytestream++ = 0xFF; *c->bytestream++ = mask;
c->outstanding_byte = c->low >> 8;
} else if (c->low >= 0x10000) {
*c->bytestream++ = c->outstanding_byte + 1;
for (; c->outstanding_count; c->outstanding_count--)
*c->bytestream++ = 0x00;
c->outstanding_byte = c->low >> 8; c->outstanding_byte = c->low >> 8;
} else { } else {
c->outstanding_count++; c->outstanding_count++;