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|
/* -*- Mode: C; c-basic-offset: 4; indent-tabs-mode: nil -*- */
/*
Copyright (C) 2009 Red Hat, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
#include <config.h>
#define COMPRESS_IMP
#if defined(ONE_BYTE) || defined(FOUR_BYTE)
# define FARGS_DECL(...) (Encoder *encoder, Channel *channel_a, __VA_ARGS__)
# define FARGS_CALL(...) (encoder, channel_a, __VA_ARGS__)
# define UNCOMPRESS_PIX_START(row) do { } while (0)
# define SET_a(pix, val) ((pix)->a = val)
# define GET_a(pix) ((pix)->a)
# define SAME_PIXEL(p1, p2) (GET_a(p1) == GET_a(p2))
# define COPY_PIXEL(dest, src) \
SET_a(dest, GET_a(src));
# define DECLARE_STATE_VARIABLES \
CommonState *state = &channel_a->state
# define DECLARE_CHANNEL_VARIABLES \
BYTE * const correlate_row_a = channel_a->correlate_row
# define APPLY_ALL_COMP(macro, ...) \
macro(a, ## __VA_ARGS__)
#else
# define FARGS_DECL(...) (Encoder *encoder, __VA_ARGS__)
# define FARGS_CALL(...) (encoder, __VA_ARGS__)
# define SAME_PIXEL(p1, p2) \
(GET_r(p1) == GET_r(p2) && GET_g(p1) == GET_g(p2) && \
GET_b(p1) == GET_b(p2))
# define COPY_PIXEL(dest, src) \
SET_r(dest, GET_r(src)); \
SET_g(dest, GET_g(src)); \
SET_b(dest, GET_b(src))
# define DECLARE_STATE_VARIABLES \
CommonState *state = &encoder->rgb_state
# define DECLARE_CHANNEL_VARIABLES \
Channel * const channel_r = encoder->channels; \
Channel * const channel_g = channel_r + 1; \
Channel * const channel_b = channel_g + 1; \
BYTE * const correlate_row_r = channel_r->correlate_row; \
BYTE * const correlate_row_g = channel_g->correlate_row; \
BYTE * const correlate_row_b = channel_b->correlate_row
# define APPLY_ALL_COMP(macro, ...) \
macro(r, ## __VA_ARGS__); \
macro(g, ## __VA_ARGS__); \
macro(b, ## __VA_ARGS__)
#endif
#ifdef ONE_BYTE
#undef ONE_BYTE
#define FNAME(name) quic_one_##name
#define PIXEL one_byte_t
#define BPC 8
#endif
#ifdef FOUR_BYTE
#undef FOUR_BYTE
#define FNAME(name) quic_four_##name
#define PIXEL four_bytes_t
#define BPC 8
#endif
#ifdef QUIC_RGB32
#undef QUIC_RGB32
#define PIXEL rgb32_pixel_t
#define FNAME(name) quic_rgb32_##name
#define BPC 8
#define SET_r(pix, val) ((pix)->r = val)
#define GET_r(pix) ((pix)->r)
#define SET_g(pix, val) ((pix)->g = val)
#define GET_g(pix) ((pix)->g)
#define SET_b(pix, val) ((pix)->b = val)
#define GET_b(pix) ((pix)->b)
#define UNCOMPRESS_PIX_START(pix) ((pix)->pad = 0)
#endif
#ifdef QUIC_RGB24
#undef QUIC_RGB24
#define PIXEL rgb24_pixel_t
#define FNAME(name) quic_rgb24_##name
#define BPC 8
#define SET_r(pix, val) ((pix)->r = val)
#define GET_r(pix) ((pix)->r)
#define SET_g(pix, val) ((pix)->g = val)
#define GET_g(pix) ((pix)->g)
#define SET_b(pix, val) ((pix)->b = val)
#define GET_b(pix) ((pix)->b)
#define UNCOMPRESS_PIX_START(pix)
#endif
#ifdef QUIC_RGB16
#undef QUIC_RGB16
#define PIXEL rgb16_pixel_t
#define FNAME(name) quic_rgb16_##name
#define BPC 5
#define SET_r(pix, val) (*(pix) = (*(pix) & ~(0x1f << 10)) | ((val) << 10))
#define GET_r(pix) ((*(pix) >> 10) & 0x1f)
#define SET_g(pix, val) (*(pix) = (*(pix) & ~(0x1f << 5)) | ((val) << 5))
#define GET_g(pix) ((*(pix) >> 5) & 0x1f)
#define SET_b(pix, val) (*(pix) = (*(pix) & ~0x1f) | (val))
#define GET_b(pix) (*(pix) & 0x1f)
#define UNCOMPRESS_PIX_START(pix) (*(pix) = 0)
#endif
#ifdef QUIC_RGB16_TO_32
#undef QUIC_RGB16_TO_32
#define PIXEL rgb32_pixel_t
#define FNAME(name) quic_rgb16_to_32_##name
#define BPC 5
#undef COMPRESS_IMP
#define SET_r(pix, val) ((pix)->r = ((val) << 3) | (((val) & 0x1f) >> 2))
#define GET_r(pix) ((pix)->r >> 3)
#define SET_g(pix, val) ((pix)->g = ((val) << 3) | (((val) & 0x1f) >> 2))
#define GET_g(pix) ((pix)->g >> 3)
#define SET_b(pix, val) ((pix)->b = ((val) << 3) | (((val) & 0x1f) >> 2))
#define GET_b(pix) ((pix)->b >> 3)
#define UNCOMPRESS_PIX_START(pix) ((pix)->pad = 0)
#endif
#define FNAME_DECL(name) FNAME(name) FARGS_DECL
#define FNAME_CALL(name) FNAME(name) FARGS_CALL
#if BPC == 5
# define golomb_coding golomb_coding_5bpc
# define golomb_decoding golomb_decoding_5bpc
# define update_model update_model_5bpc
# define find_bucket find_bucket_5bpc
# define family family_5bpc
# define BPC_MASK 0x1fU
#elif BPC == 8
# define golomb_coding golomb_coding_8bpc
# define golomb_decoding golomb_decoding_8bpc
# define update_model update_model_8bpc
# define find_bucket find_bucket_8bpc
# define family family_8bpc
# define BPC_MASK 0xffU
#else
# error BPC must be 5 or 8
#endif
#define _PIXEL_A(channel, curr) ((unsigned int)GET_##channel((curr) - 1))
#define _PIXEL_B(channel, prev) ((unsigned int)GET_##channel(prev))
/* a */
#define DECORRELATE_0(channel, curr, bpc_mask)\
family.xlatU2L[(unsigned)((int)GET_##channel(curr) - (int)_PIXEL_A(channel, curr)) & bpc_mask]
#define CORRELATE_0(channel, curr, correlate, bpc_mask)\
((family.xlatL2U[correlate] + _PIXEL_A(channel, curr)) & bpc_mask)
/* (a+b)/2 */
#define DECORRELATE(channel, prev, curr, bpc_mask, r) \
r = family.xlatU2L[(unsigned)((int)GET_##channel(curr) - (int)((_PIXEL_A(channel, curr) + \
_PIXEL_B(channel, prev)) >> 1)) & bpc_mask]
#define CORRELATE(channel, prev, curr, correlate, bpc_mask, r) \
SET_##channel(r, ((family.xlatL2U[correlate] + \
(int)((_PIXEL_A(channel, curr) + _PIXEL_B(channel, prev)) >> 1)) & bpc_mask))
#define COMPRESS_ONE_ROW0_0(channel) \
correlate_row_##channel[0] = family.xlatU2L[GET_##channel(cur_row)];\
golomb_coding(encoder, correlate_row_##channel[0], \
find_bucket(channel_##channel, \
correlate_row_##channel[-1])->bestcode)
#define COMPRESS_ONE_ROW0(channel, index) \
correlate_row_##channel[index] = DECORRELATE_0(channel, &cur_row[index], bpc_mask); \
golomb_coding(encoder, correlate_row_##channel[index], \
find_bucket(channel_##channel, \
correlate_row_##channel[index - 1])->bestcode)
#define UPDATE_MODEL_COMP(channel, index) \
update_model(state, find_bucket(channel_##channel, correlate_row_##channel[index - 1]), \
correlate_row_##channel[index])
#define UPDATE_MODEL(index) APPLY_ALL_COMP(UPDATE_MODEL_COMP, index)
#define RLE_PRED_IMP \
if (SAME_PIXEL(&prev_row[i - 1], &prev_row[i])) { \
if (run_index != i && i > 2 && SAME_PIXEL(&cur_row[i - 1], &cur_row[i - 2])) { \
goto do_run; \
} \
}
#ifdef COMPRESS_IMP
static void FNAME_DECL(compress_row0_seg)(int i,
const PIXEL * const cur_row,
const int end,
const unsigned int waitmask,
const unsigned int bpc_mask)
{
DECLARE_STATE_VARIABLES;
DECLARE_CHANNEL_VARIABLES;
int stopidx;
spice_assert(end - i > 0);
if (i == 0) {
APPLY_ALL_COMP(COMPRESS_ONE_ROW0_0);
if (state->waitcnt) {
state->waitcnt--;
} else {
state->waitcnt = (tabrand(&state->tabrand_seed) & waitmask);
UPDATE_MODEL(0);
}
stopidx = ++i + state->waitcnt;
} else {
stopidx = i + state->waitcnt;
}
while (stopidx < end) {
for (; i <= stopidx; i++) {
APPLY_ALL_COMP(COMPRESS_ONE_ROW0, i);
}
UPDATE_MODEL(stopidx);
stopidx = i + (tabrand(&state->tabrand_seed) & waitmask);
}
for (; i < end; i++) {
APPLY_ALL_COMP(COMPRESS_ONE_ROW0, i);
}
state->waitcnt = stopidx - end;
}
#undef COMPRESS_ONE_ROW0_0
#undef COMPRESS_ONE_ROW0
static void FNAME_DECL(compress_row0)(const PIXEL *cur_row, unsigned int width)
{
DECLARE_STATE_VARIABLES;
const unsigned int bpc_mask = BPC_MASK;
int pos = 0;
while ((DEFwmimax > (int)state->wmidx) && (state->wmileft <= width)) {
if (state->wmileft) {
FNAME_CALL(compress_row0_seg)(pos, cur_row, pos + state->wmileft,
bppmask[state->wmidx], bpc_mask);
width -= state->wmileft;
pos += state->wmileft;
}
state->wmidx++;
set_wm_trigger(state);
state->wmileft = DEFwminext;
}
if (width) {
FNAME_CALL(compress_row0_seg)(pos, cur_row, pos + width,
bppmask[state->wmidx], bpc_mask);
if (DEFwmimax > (int)state->wmidx) {
state->wmileft -= width;
}
}
spice_assert((int)state->wmidx <= DEFwmimax);
spice_assert(state->wmidx <= 32);
spice_assert(DEFwminext > 0);
}
#define COMPRESS_ONE_0(channel) \
correlate_row_##channel[0] = family.xlatU2L[(unsigned)((int)GET_##channel(cur_row) - \
(int)GET_##channel(prev_row) ) & bpc_mask]; \
golomb_coding(encoder, correlate_row_##channel[0], \
find_bucket(channel_##channel, correlate_row_##channel[-1])->bestcode)
#define COMPRESS_ONE(channel, index) \
DECORRELATE(channel, &prev_row[index], &cur_row[index],bpc_mask, correlate_row_##channel[index]); \
golomb_coding(encoder, correlate_row_##channel[index], \
find_bucket(channel_##channel, correlate_row_##channel[index - 1])->bestcode)
static void FNAME_DECL(compress_row_seg)(int i,
const PIXEL * const prev_row,
const PIXEL * const cur_row,
const int end,
const unsigned int waitmask,
const unsigned int bpc_mask)
{
DECLARE_STATE_VARIABLES;
DECLARE_CHANNEL_VARIABLES;
int stopidx;
int run_index = 0;
int run_size;
spice_assert(end - i > 0);
if (i == 0) {
APPLY_ALL_COMP(COMPRESS_ONE_0);
if (state->waitcnt) {
state->waitcnt--;
} else {
state->waitcnt = (tabrand(&state->tabrand_seed) & waitmask);
UPDATE_MODEL(0);
}
stopidx = ++i + state->waitcnt;
} else {
stopidx = i + state->waitcnt;
}
for (;;) {
while (stopidx < end) {
for (; i <= stopidx; i++) {
RLE_PRED_IMP;
APPLY_ALL_COMP(COMPRESS_ONE, i);
}
UPDATE_MODEL(stopidx);
stopidx = i + (tabrand(&state->tabrand_seed) & waitmask);
}
for (; i < end; i++) {
RLE_PRED_IMP;
APPLY_ALL_COMP(COMPRESS_ONE, i);
}
state->waitcnt = stopidx - end;
return;
do_run:
run_index = i;
state->waitcnt = stopidx - i;
run_size = 0;
while (SAME_PIXEL(&cur_row[i], &cur_row[i - 1])) {
run_size++;
if (++i == end) {
encode_state_run(encoder, state, run_size);
return;
}
}
encode_state_run(encoder, state, run_size);
stopidx = i + state->waitcnt;
}
}
static void FNAME_DECL(compress_row)(const PIXEL * const prev_row,
const PIXEL * const cur_row,
unsigned int width)
{
DECLARE_STATE_VARIABLES;
const unsigned int bpc_mask = BPC_MASK;
unsigned int pos = 0;
while ((DEFwmimax > (int)state->wmidx) && (state->wmileft <= width)) {
if (state->wmileft) {
FNAME_CALL(compress_row_seg)(pos, prev_row, cur_row,
pos + state->wmileft, bppmask[state->wmidx],
bpc_mask);
width -= state->wmileft;
pos += state->wmileft;
}
state->wmidx++;
set_wm_trigger(state);
state->wmileft = DEFwminext;
}
if (width) {
FNAME_CALL(compress_row_seg)(pos, prev_row, cur_row, pos + width,
bppmask[state->wmidx], bpc_mask);
if (DEFwmimax > (int)state->wmidx) {
state->wmileft -= width;
}
}
spice_assert((int)state->wmidx <= DEFwmimax);
spice_assert(state->wmidx <= 32);
spice_assert(DEFwminext > 0);
}
#endif
#define UNCOMPRESS_ONE_ROW0_0(channel) \
correlate_row_##channel[0] = (BYTE)golomb_decoding(find_bucket(channel_##channel, \
correlate_row_##channel[-1])->bestcode, \
encoder->io_word, &codewordlen); \
SET_##channel(&cur_row[0], (BYTE)family.xlatL2U[correlate_row_##channel[0]]); \
decode_eatbits(encoder, codewordlen);
#define UNCOMPRESS_ONE_ROW0(channel) \
correlate_row_##channel[i] = (BYTE)golomb_decoding(find_bucket(channel_##channel, \
correlate_row_##channel[i - 1])->bestcode, \
encoder->io_word, &codewordlen); \
SET_##channel(&cur_row[i], CORRELATE_0(channel, &cur_row[i], correlate_row_##channel[i], \
bpc_mask)); \
decode_eatbits(encoder, codewordlen);
static void FNAME_DECL(uncompress_row0_seg)(int i,
PIXEL * const cur_row,
const int end,
const unsigned int waitmask,
const unsigned int bpc_mask)
{
DECLARE_STATE_VARIABLES;
DECLARE_CHANNEL_VARIABLES;
int stopidx;
spice_assert(end - i > 0);
if (i == 0) {
unsigned int codewordlen;
UNCOMPRESS_PIX_START(&cur_row[i]);
APPLY_ALL_COMP(UNCOMPRESS_ONE_ROW0_0);
if (state->waitcnt) {
--state->waitcnt;
} else {
state->waitcnt = (tabrand(&state->tabrand_seed) & waitmask);
UPDATE_MODEL(0);
}
stopidx = ++i + state->waitcnt;
} else {
stopidx = i + state->waitcnt;
}
while (stopidx < end) {
for (; i <= stopidx; i++) {
unsigned int codewordlen;
UNCOMPRESS_PIX_START(&cur_row[i]);
APPLY_ALL_COMP(UNCOMPRESS_ONE_ROW0);
}
UPDATE_MODEL(stopidx);
stopidx = i + (tabrand(&state->tabrand_seed) & waitmask);
}
for (; i < end; i++) {
unsigned int codewordlen;
UNCOMPRESS_PIX_START(&cur_row[i]);
APPLY_ALL_COMP(UNCOMPRESS_ONE_ROW0);
}
state->waitcnt = stopidx - end;
}
static void FNAME_DECL(uncompress_row0)(PIXEL * const cur_row,
unsigned int width)
{
DECLARE_STATE_VARIABLES;
const unsigned int bpc_mask = BPC_MASK;
unsigned int pos = 0;
while ((DEFwmimax > (int)state->wmidx) && (state->wmileft <= width)) {
if (state->wmileft) {
FNAME_CALL(uncompress_row0_seg)(pos, cur_row,
pos + state->wmileft,
bppmask[state->wmidx],
bpc_mask);
pos += state->wmileft;
width -= state->wmileft;
}
state->wmidx++;
set_wm_trigger(state);
state->wmileft = DEFwminext;
}
if (width) {
FNAME_CALL(uncompress_row0_seg)(pos, cur_row, pos + width,
bppmask[state->wmidx], bpc_mask);
if (DEFwmimax > (int)state->wmidx) {
state->wmileft -= width;
}
}
spice_assert((int)state->wmidx <= DEFwmimax);
spice_assert(state->wmidx <= 32);
spice_assert(DEFwminext > 0);
}
#define UNCOMPRESS_ONE_0(channel) \
correlate_row_##channel[0] = (BYTE)golomb_decoding(find_bucket(channel_##channel, \
correlate_row_##channel[-1])->bestcode, \
encoder->io_word, &codewordlen); \
SET_##channel(&cur_row[0], (family.xlatL2U[correlate_row_##channel[0]] + \
GET_##channel(prev_row)) & bpc_mask); \
decode_eatbits(encoder, codewordlen);
#define UNCOMPRESS_ONE(channel) \
correlate_row_##channel[i] = (BYTE)golomb_decoding(find_bucket(channel_##channel, \
correlate_row_##channel[i - 1])->bestcode, \
encoder->io_word, &codewordlen); \
CORRELATE(channel, &prev_row[i], &cur_row[i], correlate_row_##channel[i], bpc_mask, \
&cur_row[i]); \
decode_eatbits(encoder, codewordlen);
static void FNAME_DECL(uncompress_row_seg)(const PIXEL * const prev_row,
PIXEL * const cur_row,
int i,
const int end,
const unsigned int bpc_mask)
{
DECLARE_STATE_VARIABLES;
DECLARE_CHANNEL_VARIABLES;
const unsigned int waitmask = bppmask[state->wmidx];
int stopidx;
int run_index = 0;
int run_end;
spice_assert(end - i > 0);
if (i == 0) {
unsigned int codewordlen;
UNCOMPRESS_PIX_START(&cur_row[i]);
APPLY_ALL_COMP(UNCOMPRESS_ONE_0);
if (state->waitcnt) {
--state->waitcnt;
} else {
state->waitcnt = (tabrand(&state->tabrand_seed) & waitmask);
UPDATE_MODEL(0);
}
stopidx = ++i + state->waitcnt;
} else {
stopidx = i + state->waitcnt;
}
for (;;) {
while (stopidx < end) {
for (; i <= stopidx; i++) {
unsigned int codewordlen;
RLE_PRED_IMP;
UNCOMPRESS_PIX_START(&cur_row[i]);
APPLY_ALL_COMP(UNCOMPRESS_ONE);
}
UPDATE_MODEL(stopidx);
stopidx = i + (tabrand(&state->tabrand_seed) & waitmask);
}
for (; i < end; i++) {
unsigned int codewordlen;
RLE_PRED_IMP;
UNCOMPRESS_PIX_START(&cur_row[i]);
APPLY_ALL_COMP(UNCOMPRESS_ONE);
}
state->waitcnt = stopidx - end;
return;
do_run:
state->waitcnt = stopidx - i;
run_index = i;
run_end = decode_state_run(encoder, state);
if (run_end < 0 || run_end > (end - i)) {
encoder->usr->error(encoder->usr, "wrong RLE\n");
}
run_end += i;
for (; i < run_end; i++) {
UNCOMPRESS_PIX_START(&cur_row[i]);
COPY_PIXEL(&cur_row[i], &cur_row[i - 1]);
}
if (i == end) {
return;
}
stopidx = i + state->waitcnt;
}
}
static void FNAME_DECL(uncompress_row)(const PIXEL * const prev_row,
PIXEL * const cur_row,
unsigned int width)
{
DECLARE_STATE_VARIABLES;
const unsigned int bpc_mask = BPC_MASK;
unsigned int pos = 0;
while ((DEFwmimax > (int)state->wmidx) && (state->wmileft <= width)) {
if (state->wmileft) {
FNAME_CALL(uncompress_row_seg)(prev_row, cur_row, pos,
pos + state->wmileft, bpc_mask);
pos += state->wmileft;
width -= state->wmileft;
}
state->wmidx++;
set_wm_trigger(state);
state->wmileft = DEFwminext;
}
if (width) {
FNAME_CALL(uncompress_row_seg)(prev_row, cur_row, pos,
pos + width, bpc_mask);
if (DEFwmimax > (int)state->wmidx) {
state->wmileft -= width;
}
}
spice_assert((int)state->wmidx <= DEFwmimax);
spice_assert(state->wmidx <= 32);
spice_assert(DEFwminext > 0);
}
#undef PIXEL
#undef FARGS_CALL
#undef FARGS_DECL
#undef FNAME
#undef FNAME_CALL
#undef FNAME_DECL
#undef _PIXEL_A
#undef _PIXEL_B
#undef SAME_PIXEL
#undef RLE_PRED_IMP
#undef UPDATE_MODEL
#undef DECORRELATE_0
#undef DECORRELATE
#undef COMPRESS_ONE_0
#undef COMPRESS_ONE
#undef CORRELATE_0
#undef CORRELATE
#undef UNCOMPRESS_ONE_ROW0_0
#undef UNCOMPRESS_ONE_ROW0
#undef UNCOMPRESS_ONE_0
#undef UNCOMPRESS_ONE
#undef golomb_coding
#undef golomb_decoding
#undef update_model
#undef find_bucket
#undef family
#undef BPC
#undef BPC_MASK
#undef COMPRESS_IMP
#undef SET_r
#undef GET_r
#undef SET_g
#undef GET_g
#undef SET_b
#undef GET_b
#undef SET_a
#undef GET_a
#undef UNCOMPRESS_PIX_START
#undef UPDATE_MODEL_COMP
#undef APPLY_ALL_COMP
#undef DECLARE_STATE_VARIABLES
#undef DECLARE_CHANNEL_VARIABLES
#undef COPY_PIXEL
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