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ffmpeg.wasm-core
Commit 29b00f88 authored by Luca Barbato's avatar Luca Barbato
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jpeg2000: Templatize the frame writer

parent 41bcc3d1
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Showing with 58 additions and 83 deletions
libavcodec/jpeg2000dec.c
View file @ 29b00f88
......@@ -1060,7 +1060,7 @@ static inline void mct_decode(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
s->dsp.mct_decode[tile->codsty[0].transform](src[0], src[1], src[2], csize);
}
static void tile_codeblocks(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
static inline void tile_codeblocks(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
{
Jpeg2000T1Context t1;
......@@ -1118,14 +1118,64 @@ static void tile_codeblocks(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile)
} /*end comp */
}
#define WRITE_FRAME(D, PIXEL) \
static inline void write_frame_ ## D(Jpeg2000DecoderContext * s, Jpeg2000Tile * tile, \
AVFrame * picture) \
{ \
int linesize = picture->linesize[0] / sizeof(PIXEL); \
int compno; \
int x, y; \
\
for (compno = 0; compno < s->ncomponents; compno++) { \
Jpeg2000Component *comp = tile->comp + compno; \
Jpeg2000CodingStyle *codsty = tile->codsty + compno; \
PIXEL *line; \
float *datap = comp->f_data; \
int32_t *i_datap = comp->i_data; \
int cbps = s->cbps[compno]; \
int w = tile->comp[compno].coord[0][1] - s->image_offset_x; \
\
y = tile->comp[compno].coord[1][0] - s->image_offset_y; \
line = (PIXEL *)picture->data[0] + y * linesize; \
for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) { \
PIXEL *dst; \
\
x = tile->comp[compno].coord[0][0] - s->image_offset_x; \
dst = line + x * s->ncomponents + compno; \
\
if (codsty->transform == FF_DWT97) { \
for (; x < w; x += s->cdx[compno]) { \
int val = lrintf(*datap) + (1 << (cbps - 1)); \
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ \
val = av_clip(val, 0, (1 << cbps) - 1); \
*dst = val << (8 * sizeof(PIXEL) - cbps); \
datap++; \
dst += s->ncomponents; \
} \
} else { \
for (; x < w; x += s->cdx[compno]) { \
int val = *i_datap + (1 << (cbps - 1)); \
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */ \
val = av_clip(val, 0, (1 << cbps) - 1); \
*dst = val << (8 * sizeof(PIXEL) - cbps); \
i_datap++; \
dst += s->ncomponents; \
} \
} \
line += linesize; \
} \
} \
\
}
WRITE_FRAME(8, uint8_t)
WRITE_FRAME(16, uint16_t)
#undef WRITE_FRAME
static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
AVFrame *picture)
{
int compno;
int x, y;
uint8_t *line;
tile_codeblocks(s, tile);
/* inverse MCT transformation */
......@@ -1133,84 +1183,9 @@ static int jpeg2000_decode_tile(Jpeg2000DecoderContext *s, Jpeg2000Tile *tile,
mct_decode(s, tile);
if (s->precision <= 8) {
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
float *datap = comp->f_data;
int32_t *i_datap = comp->i_data;
int cbps = s->cbps[compno];
int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
y = tile->comp[compno].coord[1][0] - s->image_offset_y;
line = picture->data[0] + y * picture->linesize[0];
for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
uint8_t *dst;
x = tile->comp[compno].coord[0][0] - s->image_offset_x;
dst = line + x * s->ncomponents + compno;
if (codsty->transform == FF_DWT97) {
for (; x < w; x += s->cdx[compno]) {
int val = lrintf(*datap) + (1 << (cbps - 1));
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
val = av_clip(val, 0, (1 << cbps) - 1);
*dst = val << (8 - cbps);
datap++;
dst += s->ncomponents;
}
} else {
for (; x < w; x += s->cdx[compno]) {
int val = *i_datap + (1 << (cbps - 1));
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
val = av_clip(val, 0, (1 << cbps) - 1);
*dst = val << (8 - cbps);
i_datap++;
dst += s->ncomponents;
}
}
line += picture->linesize[0];
}
}
write_frame_8(s, tile, picture);
} else {
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
float *datap = comp->f_data;
int32_t *i_datap = comp->i_data;
uint16_t *linel;
int cbps = s->cbps[compno];
int w = tile->comp[compno].coord[0][1] - s->image_offset_x;
y = tile->comp[compno].coord[1][0] - s->image_offset_y;
linel = (uint16_t *)picture->data[0] + y * (picture->linesize[0] >> 1);
for (; y < tile->comp[compno].coord[1][1] - s->image_offset_y; y += s->cdy[compno]) {
uint16_t *dst;
x = tile->comp[compno].coord[0][0] - s->image_offset_x;
dst = linel + (x * s->ncomponents + compno);
if (codsty->transform == FF_DWT97) {
for (; x < w; x += s-> cdx[compno]) {
int val = lrintf(*datap) + (1 << (cbps - 1));
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
val = av_clip(val, 0, (1 << cbps) - 1);
/* align 12 bit values in little-endian mode */
*dst = val << (16 - cbps);
datap++;
dst += s->ncomponents;
}
} else {
for (; x < w; x += s-> cdx[compno]) {
int val = *i_datap + (1 << (cbps - 1));
/* DC level shift and clip see ISO 15444-1:2002 G.1.2 */
val = av_clip(val, 0, (1 << cbps) - 1);
/* align 12 bit values in little-endian mode */
*dst = val << (16 - cbps);
i_datap++;
dst += s->ncomponents;
}
}
linel += picture->linesize[0] >> 1;
}
}
write_frame_16(s, tile, picture);
}
return 0;
......
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