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ffmpeg.wasm-core
Commit 7fb93eae authored by Luca Barbato's avatar Luca Barbato
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jpeg2000: Factor out band initialization

parent 1b709f23
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Showing with 213 additions and 193 deletions
libavcodec/jpeg2000.c
View file @ 7fb93eae
......@@ -195,96 +195,20 @@ void ff_jpeg2000_set_significance(Jpeg2000T1Context *t1, int x, int y,
static const uint8_t lut_gain[2][4] = { { 0, 0, 0, 0 }, { 0, 1, 1, 2 } };
int ff_jpeg2000_init_component(Jpeg2000Component *comp,
static int init_band(AVCodecContext *avctx,
Jpeg2000ResLevel *reslevel,
Jpeg2000Component *comp,
Jpeg2000CodingStyle *codsty,
Jpeg2000QuantStyle *qntsty,
int cbps, int dx, int dy,
AVCodecContext *avctx)
int bandno, int gbandno, int reslevelno,
int cbps, int dx, int dy)
{
Jpeg2000Band *band = reslevel->band + bandno;
uint8_t log2_band_prec_width, log2_band_prec_height;
int reslevelno, bandno, gbandno = 0, ret, i, j;
uint32_t csize;
if (!codsty->nreslevels2decode) {
av_log(avctx, AV_LOG_ERROR, "nreslevels2decode uninitialized\n");
return AVERROR_INVALIDDATA;
}
if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
codsty->nreslevels2decode - 1,
codsty->transform))
return ret;
// component size comp->coord is uint16_t so ir cannot overflow
csize = (comp->coord[0][1] - comp->coord[0][0]) *
(comp->coord[1][1] - comp->coord[1][0]);
if (codsty->transform == FF_DWT97) {
comp->i_data = NULL;
comp->f_data = av_malloc_array(csize, sizeof(*comp->f_data));
if (!comp->f_data)
return AVERROR(ENOMEM);
} else {
comp->f_data = NULL;
comp->i_data = av_malloc_array(csize, sizeof(*comp->i_data));
if (!comp->i_data)
return AVERROR(ENOMEM);
}
comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel));
if (!comp->reslevel)
return AVERROR(ENOMEM);
/* LOOP on resolution levels */
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
/* Compute borders for each resolution level.
* Computation of trx_0, trx_1, try_0 and try_1.
* see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
reslevel->coord[i][j] =
ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
// update precincts size: 2^n value
reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
/* Number of bands for each resolution level */
if (reslevelno == 0)
reslevel->nbands = 1;
else
reslevel->nbands = 3;
/* Number of precincts wich span the tile for resolution level reslevelno
* see B.6 in ISO/IEC 15444-1:2002 eq. B-16
* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
* for Dcinema profiles in JPEG 2000
* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
if (reslevel->coord[0][1] == reslevel->coord[0][0])
reslevel->num_precincts_x = 0;
else
reslevel->num_precincts_x =
ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
reslevel->log2_prec_width) -
(reslevel->coord[0][0] >> reslevel->log2_prec_width);
if (reslevel->coord[1][1] == reslevel->coord[1][0])
reslevel->num_precincts_y = 0;
else
reslevel->num_precincts_y =
ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
reslevel->log2_prec_height) -
(reslevel->coord[1][0] >> reslevel->log2_prec_height);
reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));
if (!reslevel->band)
return AVERROR(ENOMEM);
for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
Jpeg2000Band *band = reslevel->band + bandno;
int cblkno, precno;
int nb_precincts;
int i, j;
/* TODO: Implementation of quantization step not finished,
* see ISO/IEC 15444-1:2002 E.1 and A.6.4. */
......@@ -474,6 +398,102 @@ int ff_jpeg2000_init_component(Jpeg2000Component *comp,
cblk->npasses = 0;
}
}
return 0;
}
int ff_jpeg2000_init_component(Jpeg2000Component *comp,
Jpeg2000CodingStyle *codsty,
Jpeg2000QuantStyle *qntsty,
int cbps, int dx, int dy,
AVCodecContext *avctx)
{
int reslevelno, bandno, gbandno = 0, ret, i, j;
uint32_t csize;
if (!codsty->nreslevels2decode) {
av_log(avctx, AV_LOG_ERROR, "nreslevels2decode uninitialized\n");
return AVERROR_INVALIDDATA;
}
if (ret = ff_jpeg2000_dwt_init(&comp->dwt, comp->coord,
codsty->nreslevels2decode - 1,
codsty->transform))
return ret;
// component size comp->coord is uint16_t so ir cannot overflow
csize = (comp->coord[0][1] - comp->coord[0][0]) *
(comp->coord[1][1] - comp->coord[1][0]);
if (codsty->transform == FF_DWT97) {
comp->i_data = NULL;
comp->f_data = av_malloc_array(csize, sizeof(*comp->f_data));
if (!comp->f_data)
return AVERROR(ENOMEM);
} else {
comp->f_data = NULL;
comp->i_data = av_malloc_array(csize, sizeof(*comp->i_data));
if (!comp->i_data)
return AVERROR(ENOMEM);
}
comp->reslevel = av_mallocz_array(codsty->nreslevels, sizeof(*comp->reslevel));
if (!comp->reslevel)
return AVERROR(ENOMEM);
/* LOOP on resolution levels */
for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
int declvl = codsty->nreslevels - reslevelno; // N_L -r see ISO/IEC 15444-1:2002 B.5
Jpeg2000ResLevel *reslevel = comp->reslevel + reslevelno;
/* Compute borders for each resolution level.
* Computation of trx_0, trx_1, try_0 and try_1.
* see ISO/IEC 15444-1:2002 eq. B.5 and B-14 */
for (i = 0; i < 2; i++)
for (j = 0; j < 2; j++)
reslevel->coord[i][j] =
ff_jpeg2000_ceildivpow2(comp->coord_o[i][j], declvl - 1);
// update precincts size: 2^n value
reslevel->log2_prec_width = codsty->log2_prec_widths[reslevelno];
reslevel->log2_prec_height = codsty->log2_prec_heights[reslevelno];
/* Number of bands for each resolution level */
if (reslevelno == 0)
reslevel->nbands = 1;
else
reslevel->nbands = 3;
/* Number of precincts wich span the tile for resolution level reslevelno
* see B.6 in ISO/IEC 15444-1:2002 eq. B-16
* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -| - (trx_0 / 2 ^ log2_prec_width)
* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| - (try_0 / 2 ^ log2_prec_width)
* for Dcinema profiles in JPEG 2000
* num_precincts_x = |- trx_1 / 2 ^ log2_prec_width) -|
* num_precincts_y = |- try_1 / 2 ^ log2_prec_width) -| */
if (reslevel->coord[0][1] == reslevel->coord[0][0])
reslevel->num_precincts_x = 0;
else
reslevel->num_precincts_x =
ff_jpeg2000_ceildivpow2(reslevel->coord[0][1],
reslevel->log2_prec_width) -
(reslevel->coord[0][0] >> reslevel->log2_prec_width);
if (reslevel->coord[1][1] == reslevel->coord[1][0])
reslevel->num_precincts_y = 0;
else
reslevel->num_precincts_y =
ff_jpeg2000_ceildivpow2(reslevel->coord[1][1],
reslevel->log2_prec_height) -
(reslevel->coord[1][0] >> reslevel->log2_prec_height);
reslevel->band = av_mallocz_array(reslevel->nbands, sizeof(*reslevel->band));
if (!reslevel->band)
return AVERROR(ENOMEM);
for (bandno = 0; bandno < reslevel->nbands; bandno++, gbandno++) {
ret = init_band(avctx, reslevel,
comp, codsty, qntsty,
bandno, gbandno, reslevelno,
cbps, dx, dy);
if (ret < 0)
return ret;
}
}
return 0;
......
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