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libaec
Commit bd88807b authored by Mathis Rosenhauer's avatar Mathis Rosenhauer Committed by Thomas Jahns
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turn emitblock macro into function

parent 2fbc4ad9
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Showing with 91 additions and 96 deletions
src/encode.c
View file @ bd88807b
......@@ -159,101 +159,96 @@ static inline void copy64(uint8_t *dst, uint64_t src)
EMITBLOCK_FS(0);
EMITBLOCK_FS(1);
#define EMITBLOCK(ref) \
static inline void emitblock_##ref(struct aec_stream *strm, \
int k) \
{ \
/** \
Emit the k LSB of a whole block of input data. \
*/ \
\
uint64_t a; \
struct internal_state *state = strm->state; \
uint32_t *in = state->block + ref; \
uint32_t *in_end = state->block + strm->block_size; \
uint64_t mask = (1ULL << k) - 1; \
uint8_t *o = state->cds; \
int p = state->bits; \
\
a = *o; \
\
while(in < in_end) { \
a <<= 56; \
p = (p % 8) + 56; \
\
while (p > k && in < in_end) { \
p -= k; \
a += ((uint64_t)(*in++) & mask) << p; \
} \
\
switch (p & ~ 7) { \
case 0: \
o[0] = a >> 56; \
o[1] = a >> 48; \
o[2] = a >> 40; \
o[3] = a >> 32; \
o[4] = a >> 24; \
o[5] = a >> 16; \
o[6] = a >> 8; \
o += 7; \
break; \
case 8: \
o[0] = a >> 56; \
o[1] = a >> 48; \
o[2] = a >> 40; \
o[3] = a >> 32; \
o[4] = a >> 24; \
o[5] = a >> 16; \
a >>= 8; \
o += 6; \
break; \
case 16: \
o[0] = a >> 56; \
o[1] = a >> 48; \
o[2] = a >> 40; \
o[3] = a >> 32; \
o[4] = a >> 24; \
a >>= 16; \
o += 5; \
break; \
case 24: \
o[0] = a >> 56; \
o[1] = a >> 48; \
o[2] = a >> 40; \
o[3] = a >> 32; \
a >>= 24; \
o += 4; \
break; \
case 32: \
o[0] = a >> 56; \
o[1] = a >> 48; \
o[2] = a >> 40; \
a >>= 32; \
o += 3; \
break; \
case 40: \
o[0] = a >> 56; \
o[1] = a >> 48; \
a >>= 40; \
o += 2; \
break; \
case 48: \
*o++ = a >> 56; \
a >>= 48; \
break; \
default: \
a >>= 56; \
break; \
} \
} \
\
*o = a; \
state->cds = o; \
state->bits = p % 8; \
static inline void emitblock(struct aec_stream *strm, int k, int ref)
{
/**
Emit the k LSB of a whole block of input data.
*/
uint64_t a;
struct internal_state *state = strm->state;
uint32_t *in = state->block + ref;
uint32_t *in_end = state->block + strm->block_size;
uint64_t mask = (1ULL << k) - 1;
uint8_t *o = state->cds;
int p = state->bits;
a = *o;
while(in < in_end) {
a <<= 56;
p = (p % 8) + 56;
while (p > k && in < in_end) {
p -= k;
a += ((uint64_t)(*in++) & mask) << p;
}
switch (p & ~ 7) {
case 0:
o[0] = a >> 56;
o[1] = a >> 48;
o[2] = a >> 40;
o[3] = a >> 32;
o[4] = a >> 24;
o[5] = a >> 16;
o[6] = a >> 8;
o += 7;
break;
case 8:
o[0] = a >> 56;
o[1] = a >> 48;
o[2] = a >> 40;
o[3] = a >> 32;
o[4] = a >> 24;
o[5] = a >> 16;
a >>= 8;
o += 6;
break;
case 16:
o[0] = a >> 56;
o[1] = a >> 48;
o[2] = a >> 40;
o[3] = a >> 32;
o[4] = a >> 24;
a >>= 16;
o += 5;
break;
case 24:
o[0] = a >> 56;
o[1] = a >> 48;
o[2] = a >> 40;
o[3] = a >> 32;
a >>= 24;
o += 4;
break;
case 32:
o[0] = a >> 56;
o[1] = a >> 48;
o[2] = a >> 40;
a >>= 32;
o += 3;
break;
case 40:
o[0] = a >> 56;
o[1] = a >> 48;
a >>= 40;
o += 2;
break;
case 48:
*o++ = a >> 56;
a >>= 48;
break;
default:
a >>= 56;
break;
}
}
EMITBLOCK(0);
EMITBLOCK(1);
*o = a;
state->cds = o;
state->bits = p % 8;
}
static void preprocess_unsigned(struct aec_stream *strm)
{
......@@ -559,13 +554,13 @@ static int m_encode_splitting(struct aec_stream *strm)
emit(state, state->block[0], strm->bits_per_sample);
emitblock_fs_1(strm, k);
if (k)
emitblock_1(strm, k);
emitblock(strm, k, 1);
}
else
{
emitblock_fs_0(strm, k);
if (k)
emitblock_0(strm, k);
emitblock(strm, k, 0);
}
return m_flush_block(strm);
......@@ -576,7 +571,7 @@ static int m_encode_uncomp(struct aec_stream *strm)
struct internal_state *state = strm->state;
emit(state, (1U << state->id_len) - 1, state->id_len);
emitblock_0(strm, strm->bits_per_sample);
emitblock(strm, strm->bits_per_sample, 0);
return m_flush_block(strm);
}
......
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