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libaec
Commit 1c5c273f authored by Mathis Rosenhauer's avatar Mathis Rosenhauer Committed by Thomas Jahns
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Maintain two buffers with raw and preprocessed data for faster preprocessing

parent c32d9c6d
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Showing with 62 additions and 48 deletions
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;
......
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