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libaec
libaec
Commit 16cc61df authored by Mathis Rosenhauer's avatar Mathis Rosenhauer Committed by Thomas Jahns
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Write directly to output buffer

parent cda68cb1
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Showing with 52 additions and 60 deletions
src/decode.c
View file @ 16cc61df
......@@ -73,13 +73,15 @@
#define FLUSH(KIND) \
static void flush_##KIND(struct aec_stream *strm) \
{ \
int i; \
int64_t x, d, th, lower, m; \
int64_t data; \
uint32_t *bp, *bend, *flush_end; \
struct internal_state *state = strm->state; \
\
flush_end = state->bufp; \
if (state->pp) { \
if (state->flush_start == 0 && state->buf_i > 0) { \
if (state->flush_start == state->buf \
&& state->bufp > state->buf) { \
state->last_out = state->buf[0]; \
\
if (strm->flags & AEC_DATA_SIGNED) { \
......@@ -88,11 +90,11 @@
state->last_out = (state->last_out ^ m) - m; \
} \
put_##KIND(strm, state->last_out); \
state->flush_start = 1; \
state->flush_start++; \
} \
\
for (i = state->flush_start; i < state->buf_i; i++) { \
d = state->buf[i]; \
for (bp = state->flush_start; bp < flush_end; bp++) { \
d = *bp; \
x = state->last_out; \
lower = x - state->xmin; \
th = MIN(lower, state->xmax - x); \
......@@ -108,17 +110,17 @@
else \
data = x + th - d; \
} \
state->last_out = data; \
put_##KIND(strm, data); \
state->last_out = data; \
} \
} else { \
for (i = state->flush_start; i < state->buf_i; i++) \
put_##KIND(strm, state->buf[i]); \
for (bp = state->flush_start; bp < flush_end; bp++) \
put_##KIND(strm, *bp); \
} \
if (state->buf_i == state->buf_size) { \
state->flush_start = 0; \
if (state->bufp == state->buf + state->buf_size) { \
state->flush_start = state->buf; \
} else { \
state->flush_start = state->buf_i; \
state->flush_start = state->bufp; \
} \
}
......@@ -178,43 +180,27 @@ FLUSH(lsb_24);
FLUSH(lsb_16);
FLUSH(8);
static inline void put_sample(struct aec_stream *strm, uint32_t s)
static inline void check_flush(struct aec_stream *strm)
{
/**
Update counters and flush output if necessary
*/
struct internal_state *state = strm->state;
state->buf[state->buf_i++] = s;
strm->avail_out -= state->bytes_per_sample;
strm->total_out += state->bytes_per_sample;
if (state->buf_i == state->buf_size) {
if (state->bufp == state->buf + state->buf_size) {
state->flush_output(strm);
state->buf_i = 0;
state->bufp = state->buf;
}
}
static uint32_t *get_block_buffer(struct aec_stream *strm)
{
/**
Return a pointer to (the remaining part of) a block buffer
*/
return strm->state->buf + strm->state->buf_i;
}
static void flush_block_buffer(struct aec_stream *strm)
static inline void put_sample(struct aec_stream *strm, uint32_t s)
{
/**
Update counters and flush output if necessary
*/
struct internal_state *state = strm->state;
int b = strm->block_size - state->buf_i % strm->block_size;
state->buf_i += b;
strm->avail_out -= b * state->bytes_per_sample;
strm->total_out += b * state->bytes_per_sample;
if (state->buf_i == state->buf_size) {
state->flush_output(strm);
state->buf_i = 0;
}
*state->bufp++ = s;
strm->avail_out -= state->bytes_per_sample;
strm->total_out += state->bytes_per_sample;
check_flush(strm);
}
static inline void fill_acc(struct aec_stream *strm)
......@@ -342,7 +328,7 @@ static int m_id(struct aec_stream *strm)
{
struct internal_state *state = strm->state;
if (state->pp && state->buf_i == 0)
if (state->pp && state->bufp == state->buf)
state->ref = 1;
else
state->ref = 0;
......@@ -391,23 +377,23 @@ static int m_split_fs(struct aec_stream *strm)
static int m_split(struct aec_stream *strm)
{
int i, k;
uint32_t *block;
struct internal_state *state = strm->state;
if (BUFFERSPACE(strm)) {
k = state->id - 1;
block = get_block_buffer(strm);
if (state->ref)
block[0] = direct_get(strm, strm->bits_per_sample);
*state->bufp++ = direct_get(strm, strm->bits_per_sample);
for (i = state->ref; i < strm->block_size; i++)
block[i] = direct_get_fs(strm) << k;
for (i = 0; i < strm->block_size - state->ref; i++)
state->bufp[i] = direct_get_fs(strm) << k;
for (i = state->ref; i < strm->block_size; i++)
block[i] += direct_get(strm, k);
*state->bufp++ += direct_get(strm, k);
flush_block_buffer(strm);
strm->avail_out -= state->out_blklen;
strm->total_out += state->out_blklen;
check_flush(strm);
state->mode = m_id;
return M_CONTINUE;
......@@ -442,7 +428,7 @@ static int m_zero_output(struct aec_stream *strm)
static int m_zero_block(struct aec_stream *strm)
{
int i, zero_blocks, b;
int i, zero_blocks, b, zero_bytes;
struct internal_state *state = strm->state;
if (fs_ask(strm) == 0)
......@@ -451,7 +437,7 @@ static int m_zero_block(struct aec_stream *strm)
fs_drop(strm);
if (zero_blocks == ROS) {
b = state->buf_i / strm->block_size;
b = (state->bufp - state->buf) / strm->block_size;
zero_blocks = MIN(strm->rsi - b, 64 - (b % 64));
} else if (zero_blocks > ROS) {
zero_blocks--;
......@@ -462,9 +448,14 @@ static int m_zero_block(struct aec_stream *strm)
else
i = zero_blocks * strm->block_size;
if (strm->avail_out >= i * state->bytes_per_sample) {
while (i--)
put_sample(strm, 0);
zero_bytes = i * state->bytes_per_sample;
if (strm->avail_out >= zero_bytes) {
memset(state->bufp, 0, i * sizeof(uint32_t));
state->bufp += i;
strm->avail_out -= zero_bytes;
strm->total_out += zero_bytes;
check_flush(strm);
state->mode = m_id;
return M_CONTINUE;
}
......@@ -576,14 +567,15 @@ static int m_uncomp_copy(struct aec_stream *strm)
static int m_uncomp(struct aec_stream *strm)
{
int i;
uint32_t *block;
struct internal_state *state = strm->state;
if (BUFFERSPACE(strm)) {
block = get_block_buffer(strm);
for (i = 0; i < strm->block_size; i++)
block[i] = direct_get(strm, strm->bits_per_sample);
flush_block_buffer(strm);
*state->bufp++ = direct_get(strm, strm->bits_per_sample);
strm->avail_out -= state->out_blklen;
strm->total_out += state->out_blklen;
check_flush(strm);
state->mode = m_id;
return M_CONTINUE;
}
......@@ -697,8 +689,8 @@ int aec_decode_init(struct aec_stream *strm)
strm->total_in = 0;
strm->total_out = 0;
state->buf_i = 0;
state->flush_start = 0;
state->bufp = state->buf;
state->flush_start = state->buf;
state->bitp = 0;
state->fs = 0;
state->pp = strm->flags & AEC_DATA_PREPROCESS;
......
src/decode.h
View file @ 16cc61df
......@@ -91,9 +91,9 @@ struct internal_state {
int bytes_per_sample;
int *se_table;
uint32_t *buf;
uint32_t buf_i;
uint32_t *bufp;
uint32_t buf_size;
uint32_t flush_start;
uint32_t *flush_start;
} decode_state;
#endif /* DECODE_H */
tests/check_aec.h
View file @ 16cc61df
......@@ -22,5 +22,5 @@ int update_state(struct test_state *state);
int encode_decode_small(struct test_state *state);
int encode_decode_large(struct test_state *state);
#define CHECK_OK ""
#endif /* CHECK_AEC_H */
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