Skip to content

GitLab

Commit 16cc61df authored by Mathis Rosenhauer's avatar Mathis Rosenhauer Committed by Thomas Jahns
Browse files

Write directly to output buffer

parent cda68cb1
Hide whitespace changes
Inline Side-by-side
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 */
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment