Skip to content

GitLab

Commit 1c5c273f authored by Mathis Rosenhauer's avatar Mathis Rosenhauer Committed by Thomas Jahns
Browse files

Maintain two buffers with raw and preprocessed data for faster preprocessing

parent c32d9c6d
Hide whitespace changes
Inline Side-by-side
src/encode.c
View file @ 1c5c273f
......@@ -121,65 +121,66 @@ EMITBLOCK(1);
static void preprocess_unsigned(struct aec_stream *strm)
{
int64_t d;
int64_t D;
struct internal_state *state = strm->state;
uint32_t *x = state->block_buf;
int64_t x1 = *x++;
const uint32_t *x = state->data_raw;
uint32_t *d = state->data_pp;
uint32_t xmax = state->xmax;
uint32_t rsi = strm->rsi * strm->block_size - 1;
*d++ = x[0];
while (rsi--) {
if (*x >= x1) {
d = *x - x1;
if (d <= x1) {
x1 = *x;
*x = 2 * d;
if (x[1] >= x[0]) {
D = x[1] - x[0];
if (D <= x[0]) {
*d = 2 * D;
} else {
x1 = *x;
*d = x[1];
}
} else {
d = x1 - *x;
if (d <= xmax - x1) {
x1 = *x;
*x = 2 * d - 1;
D = x[0] - x[1];
if (D <= xmax - x[0]) {
*d = 2 * D - 1;
} else {
x1 = *x;
*x = xmax - *x;
*d = xmax - x[1];
}
}
d++;
x++;
}
}
static void preprocess_signed(struct aec_stream *strm)
{
int64_t d;
int64_t x;
int64_t D;
struct internal_state *state = strm->state;
uint32_t *buf = state->block_buf;
uint32_t m = 1ULL << (strm->bit_per_sample - 1);
int64_t x1 = (((int64_t)*buf++) ^ m) - m;
uint32_t *d = state->data_pp;
int32_t *x = (int32_t *)state->data_raw;
uint64_t m = 1ULL << (strm->bit_per_sample - 1);
int64_t xmax = state->xmax;
int64_t xmin = state->xmin;
uint32_t rsi = strm->rsi * strm->block_size - 1;
*d++ = (uint32_t)x[0];
x[0] = (x[0] ^ m) - m;
while (rsi--) {
x = (((int64_t)*buf) ^ m) - m;
if (x < x1) {
d = x1 - x;
if (d <= xmax - x1)
*buf = 2 * d - 1;
x[1] = (x[1] ^ m) - m;
if (x[1] < x[0]) {
D = (int64_t)x[0] - x[1];
if (D <= xmax - x[0])
*d = 2 * D - 1;
else
*buf = xmax - x;
*d = xmax - x[1];
} else {
d = x - x1;
if (d <= x1 - xmin)
*buf = 2 * d;
D = (int64_t)x[1] - x[0];
if (D <= x[0] - xmin)
*d = 2 * D;
else
*buf = x - xmin;
*d = x[1] - xmin;
}
x1 = x;
buf++;
x++;
d++;
}
}
......@@ -240,12 +241,12 @@ static int m_get_block_cautious(struct aec_stream *strm)
do {
if (strm->avail_in > 0) {
state->block_buf[state->i] = state->get_sample(strm);
state->data_raw[state->i] = state->get_sample(strm);
} else {
if (state->flush == AEC_FLUSH) {
if (state->i > 0) {
for (j = state->i; j < strm->rsi * strm->block_size; j++)
state->block_buf[j] = state->block_buf[state->i - 1];
state->data_raw[j] = state->data_raw[state->i - 1];
state->i = strm->rsi * strm->block_size;
} else {
if (state->zero_blocks) {
......@@ -682,13 +683,23 @@ int aec_encode_init(struct aec_stream *strm)
state->kmax = (1U << state->id_len) - 3;
state->block_buf = (uint32_t *)malloc(strm->rsi
state->data_pp = (uint32_t *)malloc(strm->rsi
* strm->block_size
* sizeof(uint32_t));
if (state->block_buf == NULL)
if (state->data_pp == NULL)
return AEC_MEM_ERROR;
state->block_p = state->block_buf;
if (strm->flags & AEC_DATA_PREPROCESS) {
state->data_raw = (uint32_t *)malloc(strm->rsi
* strm->block_size
* sizeof(uint32_t));
if (state->data_raw == NULL)
return AEC_MEM_ERROR;
} else {
state->data_raw = state->data_pp;
}
state->block_p = state->data_pp;
/* Largest possible CDS according to specs */
state->cds_len = (5 + 64 * 32) / 8 + 3;
......@@ -737,7 +748,9 @@ int aec_encode_end(struct aec_stream *strm)
{
struct internal_state *state = strm->state;
free(state->block_buf);
if (strm->flags & AEC_DATA_PREPROCESS)
free(state->data_raw);
free(state->data_pp);
free(state->cds_buf);
free(state);
return AEC_OK;
......
src/encode.h
View file @ 1c5c273f
......@@ -22,7 +22,8 @@ struct internal_state {
int64_t xmin; /* minimum integer for preprocessing */
int64_t xmax; /* maximum integer for preprocessing */
int i; /* counter */
uint32_t *block_buf; /* RSI blocks of input */
uint32_t *data_pp; /* RSI blocks of preprocessed input */
uint32_t *data_raw; /* RSI blocks of input */
int blocks_avail; /* remaining blocks in buffer */
uint32_t *block_p; /* pointer to current block */
int block_len; /* input block length in byte */
......
src/encode_accessors.c
View file @ 1c5c273f
......@@ -136,7 +136,7 @@ GET_NATIVE_32(lsb);
void get_rsi_8(struct aec_stream *strm)
{
uint32_t *out = strm->state->block_buf;
uint32_t *out = strm->state->data_raw;
unsigned const char *in = strm->next_in;
int rsi = strm->rsi * strm->block_size;
......@@ -161,7 +161,7 @@ void get_rsi_8(struct aec_stream *strm)
void get_rsi_lsb_24(struct aec_stream *strm)
{
uint32_t *out = strm->state->block_buf;
uint32_t *out = strm->state->data_raw;
unsigned const char *in = strm->next_in;
int rsi = strm->rsi * strm->block_size;
......@@ -202,7 +202,7 @@ void get_rsi_lsb_24(struct aec_stream *strm)
void get_rsi_msb_24(struct aec_stream *strm)
{
uint32_t *out = strm->state->block_buf;
uint32_t *out = strm->state->data_raw;
unsigned const char *in = strm->next_in;
int rsi = strm->rsi * strm->block_size;
......@@ -244,7 +244,7 @@ void get_rsi_msb_24(struct aec_stream *strm)
#define GET_RSI_NATIVE_16(BO) \
void get_rsi_##BO##_16(struct aec_stream *strm) \
{ \
uint32_t *out = strm->state->block_buf; \
uint32_t *out = strm->state->data_raw; \
uint16_t *in = (uint16_t *)strm->next_in; \
int rsi = strm->rsi * strm->block_size; \
\
......@@ -271,7 +271,7 @@ void get_rsi_msb_24(struct aec_stream *strm)
void get_rsi_##BO##_32(struct aec_stream *strm) \
{ \
int rsi = strm->rsi * strm->block_size; \
memcpy(strm->state->block_buf, \
memcpy(strm->state->data_raw, \
strm->next_in, 4 * rsi); \
strm->next_in += 4 * rsi; \
strm->total_in += 4 * rsi; \
......@@ -281,7 +281,7 @@ void get_rsi_msb_24(struct aec_stream *strm)
#ifdef WORDS_BIGENDIAN
void get_rsi_lsb_16(struct aec_stream *strm)
{
uint32_t *out = strm->state->block_buf;
uint32_t *out = strm->state->data_raw;
unsigned const char *in = strm->next_in;
int rsi = strm->rsi * strm->block_size;
......@@ -314,7 +314,7 @@ void get_rsi_lsb_16(struct aec_stream *strm)
void get_rsi_lsb_32(struct aec_stream *strm)
{
uint32_t *out = strm->state->block_buf;
uint32_t *out = strm->state->data_raw;
unsigned const char *in = strm->next_in;
int rsi = strm->rsi * strm->block_size;
......@@ -367,7 +367,7 @@ GET_RSI_NATIVE_32(msb);
#else /* !WORDS_BIGENDIAN */
void get_rsi_msb_16(struct aec_stream *strm)
{
uint32_t *out = strm->state->block_buf;
uint32_t *out = strm->state->data_raw;
unsigned const char *in = strm->next_in;
int rsi = strm->rsi * strm->block_size;
......@@ -400,7 +400,7 @@ void get_rsi_msb_16(struct aec_stream *strm)
void get_rsi_msb_32(struct aec_stream *strm)
{
uint32_t *out = strm->state->block_buf;
uint32_t *out = strm->state->data_raw;
unsigned const char *in = strm->next_in;
int rsi = strm->rsi * strm->block_size;
......
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

Imprint | Privacy Policy