mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-23 12:43:46 +02:00
avcodec: add ScreenPressor decoder
Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol
parent
ec849f637e
commit
039011b6b0
@ -24,6 +24,7 @@ version <next>:
|
||||
- Optimal Huffman tables for (M)JPEG encoding
|
||||
- FM Screen Capture Codec decoder
|
||||
- native Opus encoder
|
||||
- ScreenPressor decoder
|
||||
|
||||
version 3.2:
|
||||
- libopenmpt demuxer
|
||||
|
||||
@ -830,6 +830,7 @@ following image formats are supported:
|
||||
@tab Texture dictionaries used by the Renderware Engine.
|
||||
@item RL2 video @tab @tab X
|
||||
@tab used in some games by Entertainment Software Partners
|
||||
@item ScreenPressor @tab @tab X
|
||||
@item Screenpresso @tab @tab X
|
||||
@item Sierra VMD video @tab @tab X
|
||||
@tab Used in Sierra VMD files.
|
||||
|
||||
@ -509,6 +509,7 @@ OBJS-$(CONFIG_SAMI_DECODER) += samidec.o ass.o htmlsubtitles.o
|
||||
OBJS-$(CONFIG_S302M_DECODER) += s302m.o
|
||||
OBJS-$(CONFIG_S302M_ENCODER) += s302menc.o
|
||||
OBJS-$(CONFIG_SANM_DECODER) += sanm.o
|
||||
OBJS-$(CONFIG_SCPR_DECODER) += scpr.o
|
||||
OBJS-$(CONFIG_SCREENPRESSO_DECODER) += screenpresso.o
|
||||
OBJS-$(CONFIG_SDX2_DPCM_DECODER) += dpcm.o
|
||||
OBJS-$(CONFIG_SGI_DECODER) += sgidec.o
|
||||
|
||||
@ -307,6 +307,7 @@ void avcodec_register_all(void)
|
||||
REGISTER_DECODER(RV40, rv40);
|
||||
REGISTER_ENCDEC (S302M, s302m);
|
||||
REGISTER_DECODER(SANM, sanm);
|
||||
REGISTER_DECODER(SCPR, scpr);
|
||||
REGISTER_DECODER(SCREENPRESSO, screenpresso);
|
||||
REGISTER_DECODER(SDX2_DPCM, sdx2_dpcm);
|
||||
REGISTER_ENCDEC (SGI, sgi);
|
||||
|
||||
@ -415,6 +415,7 @@ enum AVCodecID {
|
||||
AV_CODEC_ID_PIXLET,
|
||||
AV_CODEC_ID_SPEEDHQ,
|
||||
AV_CODEC_ID_FMVC,
|
||||
AV_CODEC_ID_SCPR,
|
||||
|
||||
/* various PCM "codecs" */
|
||||
AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
|
||||
|
||||
@ -1360,6 +1360,13 @@ static const AVCodecDescriptor codec_descriptors[] = {
|
||||
.long_name = NULL_IF_CONFIG_SMALL("FM Screen Capture Codec"),
|
||||
.props = AV_CODEC_PROP_LOSSLESS,
|
||||
},
|
||||
{
|
||||
.id = AV_CODEC_ID_SCPR,
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.name = "scpr",
|
||||
.long_name = NULL_IF_CONFIG_SMALL("ScreenPressor"),
|
||||
.props = AV_CODEC_PROP_LOSSLESS | AV_CODEC_PROP_LOSSY,
|
||||
},
|
||||
|
||||
/* image codecs */
|
||||
{
|
||||
|
||||
813
libavcodec/scpr.c
Normal file
813
libavcodec/scpr.c
Normal file
@ -0,0 +1,813 @@
|
||||
/*
|
||||
* ScreenPressor decoder
|
||||
*
|
||||
* Copyright (c) 2017 Paul B Mahol
|
||||
*
|
||||
* This file is part of FFmpeg.
|
||||
*
|
||||
* FFmpeg 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.
|
||||
*
|
||||
* FFmpeg 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 FFmpeg; if not, write to the Free Software
|
||||
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
||||
*/
|
||||
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
|
||||
#include "avcodec.h"
|
||||
#include "bytestream.h"
|
||||
#include "internal.h"
|
||||
|
||||
#define TOP 0x01000000
|
||||
#define BOT 0x010000
|
||||
|
||||
typedef struct RangeCoder {
|
||||
unsigned code;
|
||||
unsigned range;
|
||||
} RangeCoder;
|
||||
|
||||
typedef struct PixelModel {
|
||||
unsigned freq[256];
|
||||
unsigned lookup[16];
|
||||
unsigned total_freq;
|
||||
} PixelModel;
|
||||
|
||||
typedef struct SCPRContext {
|
||||
AVFrame *last_frame;
|
||||
AVFrame *current_frame;
|
||||
GetByteContext gb;
|
||||
RangeCoder rc;
|
||||
PixelModel pixel_model[3][4096];
|
||||
unsigned op_model[6][7];
|
||||
unsigned run_model[6][257];
|
||||
unsigned range_model[257];
|
||||
unsigned count_model[257];
|
||||
unsigned fill_model[6];
|
||||
unsigned sxy_model[4][17];
|
||||
unsigned mv_model[2][513];
|
||||
unsigned nbx, nby;
|
||||
unsigned nbcount;
|
||||
unsigned *blocks;
|
||||
int cxshift;
|
||||
} SCPRContext;
|
||||
|
||||
static void init_rangecoder(RangeCoder *rc, GetByteContext *gb)
|
||||
{
|
||||
rc->range = 0xFFFFFFFFU;
|
||||
rc->code = bytestream2_get_be32(gb);
|
||||
}
|
||||
|
||||
static void reinit_tables(SCPRContext *s)
|
||||
{
|
||||
int comp, i, j;
|
||||
|
||||
for (comp = 0; comp < 3; comp++) {
|
||||
for (j = 0; j < 4096; j++) {
|
||||
if (s->pixel_model[comp][j].total_freq != 256) {
|
||||
for (i = 0; i < 256; i++)
|
||||
s->pixel_model[comp][j].freq[i] = 1;
|
||||
for (i = 0; i < 16; i++)
|
||||
s->pixel_model[comp][j].lookup[i] = 16;
|
||||
s->pixel_model[comp][j].total_freq = 256;
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
for (j = 0; j < 6; j++) {
|
||||
unsigned *p = s->run_model[j];
|
||||
for (i = 0; i < 256; i++)
|
||||
p[i] = 1;
|
||||
p[256] = 256;
|
||||
}
|
||||
|
||||
for (j = 0; j < 6; j++) {
|
||||
unsigned *op = s->op_model[j];
|
||||
for (i = 0; i < 6; i++)
|
||||
op[i] = 1;
|
||||
op[6] = 6;
|
||||
}
|
||||
|
||||
for (i = 0; i < 256; i++) {
|
||||
s->range_model[i] = 1;
|
||||
s->count_model[i] = 1;
|
||||
}
|
||||
s->range_model[256] = 256;
|
||||
s->count_model[256] = 256;
|
||||
|
||||
for (i = 0; i < 5; i++) {
|
||||
s->fill_model[i] = 1;
|
||||
}
|
||||
s->fill_model[5] = 5;
|
||||
|
||||
for (j = 0; j < 4; j++) {
|
||||
for (i = 0; i < 16; i++) {
|
||||
s->sxy_model[j][i] = 1;
|
||||
}
|
||||
s->sxy_model[j][16] = 16;
|
||||
}
|
||||
|
||||
for (i = 0; i < 512; i++) {
|
||||
s->mv_model[0][i] = 1;
|
||||
s->mv_model[1][i] = 1;
|
||||
}
|
||||
s->mv_model[0][512] = 512;
|
||||
s->mv_model[1][512] = 512;
|
||||
}
|
||||
|
||||
static void decode(GetByteContext *gb, RangeCoder *rc, unsigned cumFreq, unsigned freq, unsigned total_freq)
|
||||
{
|
||||
rc->code -= cumFreq * rc->range;
|
||||
rc->range *= freq;
|
||||
|
||||
while (rc->range < TOP && bytestream2_get_bytes_left(gb) > 0) {
|
||||
unsigned byte = bytestream2_get_byte(gb);
|
||||
rc->code = (rc->code << 8) | byte;
|
||||
rc->range <<= 8;
|
||||
}
|
||||
}
|
||||
|
||||
static int get_freq(RangeCoder *rc, unsigned total_freq, unsigned *freq)
|
||||
{
|
||||
if (total_freq == 0)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
rc->range = rc->range / total_freq;
|
||||
|
||||
if (rc->range == 0)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
*freq = rc->code / rc->range;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int decode_value(SCPRContext *s, unsigned *cnt, unsigned maxc, unsigned step, unsigned *rval)
|
||||
{
|
||||
GetByteContext *gb = &s->gb;
|
||||
RangeCoder *rc = &s->rc;
|
||||
unsigned totfr = cnt[maxc];
|
||||
unsigned value;
|
||||
unsigned c = 0, cumfr = 0, cnt_c = 0;
|
||||
int i, ret;
|
||||
|
||||
if ((ret = get_freq(rc, totfr, &value)) < 0)
|
||||
return ret;
|
||||
|
||||
while (c < maxc) {
|
||||
cnt_c = cnt[c];
|
||||
if (value >= cumfr + cnt_c)
|
||||
cumfr += cnt_c;
|
||||
else
|
||||
break;
|
||||
c++;
|
||||
}
|
||||
decode(gb, rc, cumfr, cnt_c, totfr);
|
||||
|
||||
cnt[c] = cnt_c + step;
|
||||
totfr += step;
|
||||
if (totfr > BOT) {
|
||||
totfr = 0;
|
||||
for (i = 0; i < maxc; i++) {
|
||||
unsigned nc = (cnt[i] >> 1) + 1;
|
||||
cnt[i] = nc;
|
||||
totfr += nc;
|
||||
}
|
||||
}
|
||||
|
||||
cnt[maxc] = totfr;
|
||||
*rval = c;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int decode_unit(SCPRContext *s, PixelModel *pixel, unsigned step, unsigned *rval)
|
||||
{
|
||||
GetByteContext *gb = &s->gb;
|
||||
RangeCoder *rc = &s->rc;
|
||||
unsigned totfr = pixel->total_freq;
|
||||
unsigned value, x = 0, cumfr = 0, cnt_x = 0;
|
||||
int i, j, ret, c, cnt_c;
|
||||
|
||||
if ((ret = get_freq(rc, totfr, &value)) < 0)
|
||||
return ret;
|
||||
|
||||
while (x < 16) {
|
||||
cnt_x = pixel->lookup[x];
|
||||
if (value >= cumfr + cnt_x)
|
||||
cumfr += cnt_x;
|
||||
else
|
||||
break;
|
||||
x++;
|
||||
}
|
||||
|
||||
c = x * 16;
|
||||
cnt_c = 0;
|
||||
while (c < 256) {
|
||||
cnt_c = pixel->freq[c];
|
||||
if (value >= cumfr + cnt_c)
|
||||
cumfr += cnt_c;
|
||||
else
|
||||
break;
|
||||
c++;
|
||||
}
|
||||
decode(gb, rc, cumfr, cnt_c, totfr);
|
||||
pixel->freq[c] = cnt_c + step;
|
||||
pixel->lookup[x] = cnt_x + step;
|
||||
totfr += step;
|
||||
if (totfr > BOT) {
|
||||
totfr = 0;
|
||||
for (i = 0; i < 256; i++) {
|
||||
unsigned nc = (pixel->freq[i] >> 1) + 1;
|
||||
pixel->freq[i] = nc;
|
||||
totfr += nc;
|
||||
}
|
||||
for (i = 0; i < 16; i++) {
|
||||
unsigned sum = 0;
|
||||
unsigned i16_17 = i << 4;
|
||||
for (j = 0; j < 16; j++)
|
||||
sum += pixel->freq[i16_17 + j];
|
||||
pixel->lookup[i] = sum;
|
||||
}
|
||||
}
|
||||
pixel->total_freq = totfr;
|
||||
|
||||
*rval = c;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int decompress_i(AVCodecContext *avctx, uint32_t *dst, int linesize)
|
||||
{
|
||||
SCPRContext *s = avctx->priv_data;
|
||||
GetByteContext *gb = &s->gb;
|
||||
int cx = 0, cx1 = 0, k = 0, clr = 0;
|
||||
int run, r, g, b, off, y = 0, x = 0, ret;
|
||||
const int cxshift = s->cxshift;
|
||||
unsigned lx, ly, ptype;
|
||||
|
||||
reinit_tables(s);
|
||||
bytestream2_skip(gb, 2);
|
||||
init_rangecoder(&s->rc, gb);
|
||||
|
||||
while (k < avctx->width + 1) {
|
||||
ret = decode_unit(s, &s->pixel_model[0][cx + cx1], 400, &r);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = r >> cxshift;
|
||||
ret = decode_unit(s, &s->pixel_model[1][cx + cx1], 400, &g);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = g >> cxshift;
|
||||
ret = decode_unit(s, &s->pixel_model[2][cx + cx1], 400, &b);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = b >> cxshift;
|
||||
|
||||
ret = decode_value(s, s->run_model[0], 256, 400, &run);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
clr = (b << 16) + (g << 8) + r;
|
||||
k += run;
|
||||
while (run-- > 0) {
|
||||
dst[y * linesize + x] = clr;
|
||||
lx = x;
|
||||
ly = y;
|
||||
x++;
|
||||
if (x >= avctx->width) {
|
||||
x = 0;
|
||||
y++;
|
||||
}
|
||||
}
|
||||
}
|
||||
off = -linesize - 1;
|
||||
ptype = 0;
|
||||
|
||||
while (x < avctx->width && y < avctx->height) {
|
||||
ret = decode_value(s, s->op_model[ptype], 6, 1000, &ptype);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
if (ptype == 0) {
|
||||
ret = decode_unit(s, &s->pixel_model[0][cx + cx1], 400, &r);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = r >> cxshift;
|
||||
ret = decode_unit(s, &s->pixel_model[1][cx + cx1], 400, &g);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = g >> cxshift;
|
||||
ret = decode_unit(s, &s->pixel_model[2][cx + cx1], 400, &b);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = b >> cxshift;
|
||||
clr = (b << 16) + (g << 8) + r;
|
||||
}
|
||||
if (ptype > 5)
|
||||
return AVERROR_INVALIDDATA;
|
||||
ret = decode_value(s, s->run_model[ptype], 256, 400, &run);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
switch (ptype) {
|
||||
case 0:
|
||||
while (run-- > 0) {
|
||||
dst[y * linesize + x] = clr;
|
||||
lx = x;
|
||||
ly = y;
|
||||
x++;
|
||||
if (x >= avctx->width) {
|
||||
x = 0;
|
||||
y++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 1:
|
||||
while (run-- > 0) {
|
||||
dst[y * linesize + x] = dst[ly * linesize + lx];
|
||||
lx = x;
|
||||
ly = y;
|
||||
x++;
|
||||
if (x >= avctx->width) {
|
||||
x = 0;
|
||||
y++;
|
||||
}
|
||||
}
|
||||
clr = dst[ly * linesize + lx];
|
||||
break;
|
||||
case 2:
|
||||
while (run-- > 0) {
|
||||
clr = dst[y * linesize + x + off + 1];
|
||||
dst[y * linesize + x] = clr;
|
||||
lx = x;
|
||||
ly = y;
|
||||
x++;
|
||||
if (x >= avctx->width) {
|
||||
x = 0;
|
||||
y++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 4:
|
||||
while (run-- > 0) {
|
||||
uint8_t *odst = (uint8_t *)dst;
|
||||
r = odst[(ly * linesize + lx) * 4] +
|
||||
odst[((y * linesize + x) + off) * 4 + 4] -
|
||||
odst[((y * linesize + x) + off) * 4];
|
||||
g = odst[(ly * linesize + lx) * 4 + 1] +
|
||||
odst[((y * linesize + x) + off) * 4 + 5] -
|
||||
odst[((y * linesize + x) + off) * 4 + 1];
|
||||
b = odst[(ly * linesize + lx) * 4 + 2] +
|
||||
odst[((y * linesize + x) + off) * 4 + 6] -
|
||||
odst[((y * linesize + x) + off) * 4 + 2];
|
||||
clr = ((b & 0xFF) << 16) + ((g & 0xFF) << 8) + (r & 0xFF);
|
||||
dst[y * linesize + x] = clr;
|
||||
lx = x;
|
||||
ly = y;
|
||||
x++;
|
||||
if (x >= avctx->width) {
|
||||
x = 0;
|
||||
y++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 5:
|
||||
while (run-- > 0) {
|
||||
clr = dst[y * linesize + x + off];
|
||||
dst[y * linesize + x] = clr;
|
||||
lx = x;
|
||||
ly = y;
|
||||
x++;
|
||||
if (x >= avctx->width) {
|
||||
x = 0;
|
||||
y++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (avctx->bits_per_coded_sample == 16) {
|
||||
cx1 = (clr & 0xFF00) >> 2;
|
||||
cx = (clr & 0xFFFFFF) >> 16;
|
||||
} else {
|
||||
cx1 = (clr & 0xFC00) >> 4;
|
||||
cx = (clr & 0xFFFFFF) >> 18;
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int decompress_p(AVCodecContext *avctx,
|
||||
uint32_t *dst, int linesize,
|
||||
uint32_t *prev, int plinesize)
|
||||
{
|
||||
SCPRContext *s = avctx->priv_data;
|
||||
GetByteContext *gb = &s->gb;
|
||||
int ret, temp, min, max, x, y, cx = 0, cx1 = 0;
|
||||
int backstep = linesize - avctx->width;
|
||||
const int cxshift = s->cxshift;
|
||||
|
||||
if (bytestream2_get_byte(gb) == 0)
|
||||
return 0;
|
||||
bytestream2_skip(gb, 1);
|
||||
init_rangecoder(&s->rc, gb);
|
||||
|
||||
ret = decode_value(s, s->range_model, 256, 1, &min);
|
||||
ret |= decode_value(s, s->range_model, 256, 1, &temp);
|
||||
min += temp << 8;
|
||||
ret |= decode_value(s, s->range_model, 256, 1, &max);
|
||||
ret |= decode_value(s, s->range_model, 256, 1, &temp);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
max += temp << 8;
|
||||
memset(s->blocks, 0, sizeof(*s->blocks) * s->nbcount);
|
||||
|
||||
while (min <= max) {
|
||||
int fill, count;
|
||||
|
||||
ret = decode_value(s, s->fill_model, 5, 10, &fill);
|
||||
ret |= decode_value(s, s->count_model, 256, 20, &count);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
while (min < s->nbcount && count-- > 0) {
|
||||
s->blocks[min++] = fill;
|
||||
}
|
||||
}
|
||||
|
||||
for (y = 0; y < s->nby; y++) {
|
||||
for (x = 0; x < s->nbx; x++) {
|
||||
int sy1 = 0, sy2 = 16, sx1 = 0, sx2 = 16;
|
||||
|
||||
if (s->blocks[y * s->nbx + x] == 0)
|
||||
continue;
|
||||
|
||||
if (((s->blocks[y * s->nbx + x] - 1) & 1) > 0) {
|
||||
ret = decode_value(s, s->sxy_model[0], 16, 100, &sx1);
|
||||
ret |= decode_value(s, s->sxy_model[1], 16, 100, &sy1);
|
||||
ret |= decode_value(s, s->sxy_model[2], 16, 100, &sx2);
|
||||
ret |= decode_value(s, s->sxy_model[3], 16, 100, &sy2);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
sx2++;
|
||||
sy2++;
|
||||
}
|
||||
if (((s->blocks[y * s->nbx + x] - 1) & 2) > 0) {
|
||||
int i, j, by = y * 16, bx = x * 16;
|
||||
int mvx, mvy;
|
||||
|
||||
ret = decode_value(s, s->mv_model[0], 512, 100, &mvx);
|
||||
ret |= decode_value(s, s->mv_model[1], 512, 100, &mvy);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
mvx -= 256;
|
||||
mvy -= 256;
|
||||
|
||||
if (by + mvy + sy1 < 0 || bx + mvx + sx1 < 0)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
for (i = 0; i < sy2 - sy1 && (by + sy1 + i) < avctx->height; i++) {
|
||||
for (j = 0; j < sx2 - sx1 && (bx + sx1 + j) < avctx->width; j++) {
|
||||
dst[(by + i + sy1) * linesize + bx + sx1 + j] = prev[(by + mvy + sy1 + i) * plinesize + bx + sx1 + mvx + j];
|
||||
}
|
||||
}
|
||||
} else {
|
||||
int run, r, g, b, z, bx = x * 16 + sx1, by = y * 16 + sy1;
|
||||
unsigned clr, ptype = 0;
|
||||
|
||||
for (; by < y * 16 + sy2 && by < avctx->height;) {
|
||||
ret = decode_value(s, s->op_model[ptype], 6, 1000, &ptype);
|
||||
if (ptype == 0) {
|
||||
ret = decode_unit(s, &s->pixel_model[0][cx + cx1], 400, &r);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = r >> cxshift;
|
||||
ret = decode_unit(s, &s->pixel_model[1][cx + cx1], 400, &g);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = g >> cxshift;
|
||||
ret = decode_unit(s, &s->pixel_model[2][cx + cx1], 400, &b);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
cx1 = (cx << 6) & 0xFC0;
|
||||
cx = b >> cxshift;
|
||||
clr = (b << 16) + (g << 8) + r;
|
||||
}
|
||||
if (ptype > 5)
|
||||
return AVERROR_INVALIDDATA;
|
||||
ret = decode_value(s, s->run_model[ptype], 256, 400, &run);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
switch (ptype) {
|
||||
case 0:
|
||||
while (run-- > 0) {
|
||||
if (by >= avctx->height)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
dst[by * linesize + bx] = clr;
|
||||
bx++;
|
||||
if (bx >= x * 16 + sx2 || bx >= avctx->width) {
|
||||
bx = x * 16 + sx1;
|
||||
by++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 1:
|
||||
while (run-- > 0) {
|
||||
if (bx == 0) {
|
||||
if (by < 1)
|
||||
return AVERROR_INVALIDDATA;
|
||||
z = backstep;
|
||||
} else {
|
||||
z = 0;
|
||||
}
|
||||
|
||||
if (by >= avctx->height)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
clr = dst[by * linesize + bx - 1 - z];
|
||||
dst[by * linesize + bx] = clr;
|
||||
bx++;
|
||||
if (bx >= x * 16 + sx2 || bx >= avctx->width) {
|
||||
bx = x * 16 + sx1;
|
||||
by++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 2:
|
||||
while (run-- > 0) {
|
||||
if (by < 1 || by >= avctx->height)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
clr = dst[(by - 1) * linesize + bx];
|
||||
dst[by * linesize + bx] = clr;
|
||||
bx++;
|
||||
if (bx >= x * 16 + sx2 || bx >= avctx->width) {
|
||||
bx = x * 16 + sx1;
|
||||
by++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 3:
|
||||
while (run-- > 0) {
|
||||
if (by >= avctx->height)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
clr = prev[by * linesize + bx];
|
||||
dst[by * linesize + bx] = clr;
|
||||
bx++;
|
||||
if (bx >= x * 16 + sx2 || bx >= avctx->width) {
|
||||
bx = x * 16 + sx1;
|
||||
by++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 4:
|
||||
while (run-- > 0) {
|
||||
uint8_t *odst = (uint8_t *)dst;
|
||||
|
||||
if (by < 1 || by >= avctx->height)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
if (bx == 0) {
|
||||
z = backstep;
|
||||
} else {
|
||||
z = 0;
|
||||
}
|
||||
|
||||
r = odst[((by - 1) * linesize + bx) * 4] +
|
||||
odst[(by * linesize + bx - 1 - z) * 4] -
|
||||
odst[((by - 1) * linesize + bx - 1 - z) * 4];
|
||||
g = odst[((by - 1) * linesize + bx) * 4 + 1] +
|
||||
odst[(by * linesize + bx - 1 - z) * 4 + 1] -
|
||||
odst[((by - 1) * linesize + bx - 1 - z) * 4 + 1];
|
||||
b = odst[((by - 1) * linesize + bx) * 4 + 2] +
|
||||
odst[(by * linesize + bx - 1 - z) * 4 + 2] -
|
||||
odst[((by - 1) * linesize + bx - 1 - z) * 4 + 2];
|
||||
clr = ((b & 0xFF) << 16) + ((g & 0xFF) << 8) + (r & 0xFF);
|
||||
dst[by * linesize + bx] = clr;
|
||||
bx++;
|
||||
if (bx >= x * 16 + sx2 || bx >= avctx->width) {
|
||||
bx = x * 16 + sx1;
|
||||
by++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
case 5:
|
||||
while (run-- > 0) {
|
||||
if (by < 1 || by >= avctx->height)
|
||||
return AVERROR_INVALIDDATA;
|
||||
|
||||
if (bx == 0) {
|
||||
z = backstep;
|
||||
} else {
|
||||
z = 0;
|
||||
}
|
||||
|
||||
clr = dst[(by - 1) * linesize + bx - 1 - z];
|
||||
dst[by * linesize + bx] = clr;
|
||||
bx++;
|
||||
if (bx >= x * 16 + sx2 || bx >= avctx->width) {
|
||||
bx = x * 16 + sx1;
|
||||
by++;
|
||||
}
|
||||
}
|
||||
break;
|
||||
}
|
||||
|
||||
if (avctx->bits_per_coded_sample == 16) {
|
||||
cx1 = (clr & 0xFF00) >> 2;
|
||||
cx = (clr & 0xFFFFFF) >> 16;
|
||||
} else {
|
||||
cx1 = (clr & 0xFC00) >> 4;
|
||||
cx = (clr & 0xFFFFFF) >> 18;
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
|
||||
AVPacket *avpkt)
|
||||
{
|
||||
SCPRContext *s = avctx->priv_data;
|
||||
GetByteContext *gb = &s->gb;
|
||||
AVFrame *frame = data;
|
||||
int ret, type;
|
||||
|
||||
if (avctx->bits_per_coded_sample == 16) {
|
||||
if ((ret = ff_get_buffer(avctx, frame, 0)) < 0)
|
||||
return ret;
|
||||
}
|
||||
|
||||
if ((ret = ff_reget_buffer(avctx, s->current_frame)) < 0)
|
||||
return ret;
|
||||
|
||||
bytestream2_init(gb, avpkt->data, avpkt->size);
|
||||
|
||||
type = bytestream2_peek_byte(gb);
|
||||
|
||||
if (type == 18) {
|
||||
frame->key_frame = 1;
|
||||
ret = decompress_i(avctx, (uint32_t *)s->current_frame->data[0],
|
||||
s->current_frame->linesize[0] / 4);
|
||||
} else if (type == 17) {
|
||||
uint32_t clr, *dst = (uint32_t *)s->current_frame->data[0];
|
||||
int x, y;
|
||||
|
||||
frame->key_frame = 1;
|
||||
bytestream2_skip(gb, 1);
|
||||
if (avctx->bits_per_coded_sample == 16) {
|
||||
uint16_t value = bytestream2_get_le16(gb);
|
||||
int r, g, b;
|
||||
|
||||
r = (value ) & 31;
|
||||
g = (value >> 5) & 31;
|
||||
b = (value >> 10) & 31;
|
||||
clr = (r << 16) + (g << 8) + b;
|
||||
} else {
|
||||
clr = bytestream2_get_le24(gb);
|
||||
}
|
||||
for (y = 0; y < avctx->height; y++) {
|
||||
for (x = 0; x < avctx->width; x++) {
|
||||
dst[x] = clr;
|
||||
}
|
||||
dst += s->current_frame->linesize[0] / 4;
|
||||
}
|
||||
} else if (type == 0 || type == 1) {
|
||||
frame->key_frame = 0;
|
||||
|
||||
ret = av_frame_copy(s->current_frame, s->last_frame);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
ret = decompress_p(avctx, (uint32_t *)s->current_frame->data[0],
|
||||
s->current_frame->linesize[0] / 4,
|
||||
(uint32_t *)s->last_frame->data[0],
|
||||
s->last_frame->linesize[0] / 4);
|
||||
} else {
|
||||
return AVERROR_PATCHWELCOME;
|
||||
}
|
||||
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
if (avctx->bits_per_coded_sample != 16) {
|
||||
ret = av_frame_ref(data, s->current_frame);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
} else {
|
||||
uint8_t *dst = frame->data[0];
|
||||
int x, y;
|
||||
|
||||
ret = av_frame_copy(frame, s->current_frame);
|
||||
if (ret < 0)
|
||||
return ret;
|
||||
|
||||
for (y = 0; y < avctx->height; y++) {
|
||||
for (x = 0; x < avctx->width * 4; x++) {
|
||||
dst[x] = dst[x] << 3;
|
||||
}
|
||||
dst += frame->linesize[0];
|
||||
}
|
||||
}
|
||||
|
||||
frame->pict_type = frame->key_frame ? AV_PICTURE_TYPE_I : AV_PICTURE_TYPE_P;
|
||||
|
||||
FFSWAP(AVFrame *, s->current_frame, s->last_frame);
|
||||
|
||||
frame->data[0] += frame->linesize[0] * (avctx->height - 1);
|
||||
frame->linesize[0] *= -1;
|
||||
|
||||
*got_frame = 1;
|
||||
|
||||
return avpkt->size;
|
||||
}
|
||||
|
||||
static av_cold int decode_init(AVCodecContext *avctx)
|
||||
{
|
||||
SCPRContext *s = avctx->priv_data;
|
||||
|
||||
switch (avctx->bits_per_coded_sample) {
|
||||
case 16: avctx->pix_fmt = AV_PIX_FMT_RGB0; break;
|
||||
case 24:
|
||||
case 32: avctx->pix_fmt = AV_PIX_FMT_BGR0; break;
|
||||
default:
|
||||
av_log(avctx, AV_LOG_ERROR, "Unsupported bitdepth %i\n", avctx->bits_per_coded_sample);
|
||||
return AVERROR_INVALIDDATA;
|
||||
}
|
||||
|
||||
s->cxshift = avctx->bits_per_coded_sample == 16 ? 0 : 2;
|
||||
s->nbx = (avctx->width + 15) / 16;
|
||||
s->nby = (avctx->height + 15) / 16;
|
||||
s->nbcount = s->nbx * s->nby;
|
||||
s->blocks = av_malloc_array(s->nbcount, sizeof(*s->blocks));
|
||||
if (!s->blocks)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
s->last_frame = av_frame_alloc();
|
||||
s->current_frame = av_frame_alloc();
|
||||
if (!s->last_frame || !s->current_frame)
|
||||
return AVERROR(ENOMEM);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static av_cold int decode_close(AVCodecContext *avctx)
|
||||
{
|
||||
SCPRContext *s = avctx->priv_data;
|
||||
|
||||
av_freep(&s->blocks);
|
||||
av_frame_free(&s->last_frame);
|
||||
av_frame_free(&s->current_frame);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
AVCodec ff_scpr_decoder = {
|
||||
.name = "scpr",
|
||||
.long_name = NULL_IF_CONFIG_SMALL("ScreenPressor"),
|
||||
.type = AVMEDIA_TYPE_VIDEO,
|
||||
.id = AV_CODEC_ID_SCPR,
|
||||
.priv_data_size = sizeof(SCPRContext),
|
||||
.init = decode_init,
|
||||
.close = decode_close,
|
||||
.decode = decode_frame,
|
||||
.capabilities = AV_CODEC_CAP_DR1,
|
||||
.caps_internal = FF_CODEC_CAP_INIT_THREADSAFE |
|
||||
FF_CODEC_CAP_INIT_CLEANUP,
|
||||
};
|
||||
@ -28,8 +28,8 @@
|
||||
#include "libavutil/version.h"
|
||||
|
||||
#define LIBAVCODEC_VERSION_MAJOR 57
|
||||
#define LIBAVCODEC_VERSION_MINOR 80
|
||||
#define LIBAVCODEC_VERSION_MICRO 101
|
||||
#define LIBAVCODEC_VERSION_MINOR 81
|
||||
#define LIBAVCODEC_VERSION_MICRO 100
|
||||
|
||||
#define LIBAVCODEC_VERSION_INT AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
|
||||
LIBAVCODEC_VERSION_MINOR, \
|
||||
|
||||
@ -449,6 +449,7 @@ const AVCodecTag ff_codec_bmp_tags[] = {
|
||||
{ AV_CODEC_ID_SPEEDHQ, MKTAG('S', 'H', 'Q', '7') },
|
||||
{ AV_CODEC_ID_SPEEDHQ, MKTAG('S', 'H', 'Q', '9') },
|
||||
{ AV_CODEC_ID_FMVC, MKTAG('F', 'M', 'V', 'C') },
|
||||
{ AV_CODEC_ID_SCPR, MKTAG('S', 'C', 'P', 'R') },
|
||||
|
||||
{ AV_CODEC_ID_NONE, 0 }
|
||||
};
|
||||
|
||||
Loading…
Reference in New Issue
Block a user