* @author Kamil Nowosad
*/
+#include "libavutil/common.h"
+#include "libavutil/opt.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"
#include "thread.h"
#include "j2k.h"
-#include "libavutil/common.h"
#define JP2_SIG_TYPE 0x6A502020
#define JP2_SIG_VALUE 0x0D0A870A
#define HAD_QCC 0x02
typedef struct Jpeg2000Tile {
- Jpeg2000Component *comp;
- uint8_t properties[4];
- Jpeg2000CodingStyle codsty[4];
- Jpeg2000QuantStyle qntsty[4];
+ Jpeg2000Component *comp;
+ uint8_t properties[4];
+ Jpeg2000CodingStyle codsty[4];
+ Jpeg2000QuantStyle qntsty[4];
} Jpeg2000Tile;
typedef struct Jpeg2000DecoderContext {
int curtileno;
Jpeg2000Tile *tile;
+
+ /*options parameters*/
+ int lowres;
+ int reduction_factor;
} Jpeg2000DecoderContext;
+/* get_bits functions for JPEG2000 packet bitstream
+ * It is a get_bit function with a bit-stuffing routine. If the value of the
+ * byte is 0xFF, the next byte includes an extra zero bit stuffed into the MSB.
+ * cf. ISO-15444-1:2002 / B.10.1 Bit-stuffing routine */
static int get_bits(Jpeg2000DecoderContext *s, int n)
{
int res = 0;
s->bit_index = 8;
}
-/** decode the value stored in node */
-static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node, int threshold)
+/* decode the value stored in node */
+static int tag_tree_decode(Jpeg2000DecoderContext *s, Jpeg2000TgtNode *node,
+ int threshold)
{
Jpeg2000TgtNode *stack[30];
int sp = -1, curval = 0;
while (node && !node->vis) {
stack[++sp] = node;
- node = node->parent;
+ node = node->parent;
}
if (node)
for (i = 0; i < s->ncomponents; i++) { // Ssiz_i XRsiz_i, YRsiz_i
uint8_t x = bytestream2_get_byteu(&s->g);
- s->cbps[i] = (x & 0x7f) + 1;
+ s->cbps[i] = (x & 0x7f) + 1;
s->precision = FFMAX(s->cbps[i], s->precision);
s->sgnd[i] = !!(x & 0x80);
s->cdx[i] = bytestream2_get_byteu(&s->g);
s->cdy[i] = bytestream2_get_byteu(&s->g);
+ if (s->cdx[i] != 1 || s->cdy[i] != 1) {
+ av_log(s->avctx, AV_LOG_ERROR, "unsupported/ CDxy values\n");
+ }
}
- s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
+ s->numXtiles = ff_jpeg2000_ceildiv(s->width - s->tile_offset_x, s->tile_width);
s->numYtiles = ff_jpeg2000_ceildiv(s->height - s->tile_offset_y, s->tile_height);
if (s->numXtiles * (uint64_t)s->numYtiles > INT_MAX/sizeof(Jpeg2000Tile))
return AVERROR(EINVAL);
- s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(Jpeg2000Tile));
+ s->tile = av_mallocz(s->numXtiles * s->numYtiles * sizeof(*s->tile));
if (!s->tile)
return AVERROR(ENOMEM);
for (i = 0; i < s->numXtiles * s->numYtiles; i++) {
Jpeg2000Tile *tile = s->tile + i;
- tile->comp = av_mallocz(s->ncomponents * sizeof(Jpeg2000Component));
+ tile->comp = av_mallocz(s->ncomponents * sizeof(*tile->comp));
if (!tile->comp)
return AVERROR(ENOMEM);
}
- s->avctx->width = s->width - s->image_offset_x;
- s->avctx->height = s->height - s->image_offset_y;
-
+ /* compute image size with reduction factor */
+ s->avctx->width = ff_jpeg2000_ceildivpow2(s->width - s->image_offset_x,
+ s->reduction_factor);
+ s->avctx->height = ff_jpeg2000_ceildivpow2(s->height - s->image_offset_y,
+ s->reduction_factor);
switch(s->ncomponents) {
case 1:
if (s->precision > 8) {
return 0;
}
-/** get common part for COD and COC segments */
+/* get common part for COD and COC segments */
static int get_cox(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c)
{
+ uint8_t byte;
+
if (bytestream2_get_bytes_left(&s->g) < 5)
return AVERROR(EINVAL);
- c->nreslevels = bytestream2_get_byteu(&s->g) + 1; // num of resolution levels - 1
- c->log2_cblk_width = bytestream2_get_byteu(&s->g) + 2; // cblk width
- c->log2_cblk_height = bytestream2_get_byteu(&s->g) + 2; // cblk height
+ c->nreslevels = bytestream2_get_byteu(&s->g) + 1; // num of resolution levels - 1
+ if (c->nreslevels >= JPEG2000_MAX_RESLEVELS) {
+ av_log(s->avctx, AV_LOG_ERROR, "nreslevels %d is invalid\n", c->nreslevels);
+ return AVERROR_INVALIDDATA;
+ }
+
+ /* compute number of resolution levels to decode */
+ if (c->nreslevels < s->reduction_factor)
+ c->nreslevels2decode = 1;
+ else
+ c->nreslevels2decode = c->nreslevels - s->reduction_factor;
+
+ c->log2_cblk_width = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk width
+ c->log2_cblk_height = (bytestream2_get_byteu(&s->g) & 15) + 2; // cblk height
+
+ if (c->log2_cblk_width > 10 || c->log2_cblk_height > 10 ||
+ c->log2_cblk_width + c->log2_cblk_height > 14) {
+ av_log(s->avctx, AV_LOG_ERROR, "cblk size invalid\n");
+ return AVERROR_INVALIDDATA;
+ }
c->cblk_style = bytestream2_get_byteu(&s->g);
if (c->cblk_style != 0) { // cblk style
c->transform = bytestream2_get_byteu(&s->g); // transformation
if (c->csty & JPEG2000_CSTY_PREC) {
int i;
-
- for (i = 0; i < c->nreslevels; i++)
- bytestream2_get_byte(&s->g);
+ for (i = 0; i < c->nreslevels; i++) {
+ byte = bytestream2_get_byte(&s->g);
+ c->log2_prec_widths[i] = byte & 0x0F; // precinct PPx
+ c->log2_prec_heights[i] = (byte >> 4) & 0x0F; // precinct PPy
+ }
+ } else {
+ memset(c->log2_prec_widths , 15, sizeof(c->log2_prec_widths ));
+ memset(c->log2_prec_heights, 15, sizeof(c->log2_prec_heights));
}
return 0;
}
-/** get coding parameters for a particular tile or whole image*/
-static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)
+/* get coding parameters for a particular tile or whole image*/
+static int get_cod(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
+ uint8_t *properties)
{
Jpeg2000CodingStyle tmp;
int compno;
if (bytestream2_get_bytes_left(&s->g) < 5)
return AVERROR(EINVAL);
- tmp.log2_prec_width =
- tmp.log2_prec_height = 15;
-
tmp.csty = bytestream2_get_byteu(&s->g);
// get progression order
}
tmp.nlayers = bytestream2_get_be16u(&s->g);
- tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
+ tmp.mct = bytestream2_get_byteu(&s->g); // multiple component transformation
get_cox(s, &tmp);
- for (compno = 0; compno < s->ncomponents; compno++) {
+ for (compno = 0; compno < s->ncomponents; compno++)
if (!(properties[compno] & HAD_COC))
- memcpy(c + compno, &tmp, sizeof(Jpeg2000CodingStyle));
- }
+ memcpy(c + compno, &tmp, sizeof(tmp));
return 0;
}
-/** get coding parameters for a component in the whole image on a particular tile */
-static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c, uint8_t *properties)
+/* Get coding parameters for a component in the whole image or a
+ * particular tile. */
+static int get_coc(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *c,
+ uint8_t *properties)
{
int compno;
compno = bytestream2_get_byteu(&s->g);
c += compno;
- c->csty = bytestream2_get_byte(&s->g);
+ c->csty = bytestream2_get_byteu(&s->g);
get_cox(s, c);
properties[compno] |= HAD_COC;
return 0;
}
-/** get common part for QCD and QCC segments */
+/* Get common part for QCD and QCC segments. */
static int get_qcx(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q)
{
int i, x;
x = bytestream2_get_byteu(&s->g); // Sqcd
q->nguardbits = x >> 5;
- q->quantsty = x & 0x1f;
+ q->quantsty = x & 0x1f;
if (q->quantsty == JPEG2000_QSTY_NONE) {
n -= 3;
} else if (q->quantsty == JPEG2000_QSTY_SI) {
if (bytestream2_get_bytes_left(&s->g) < 2)
return AVERROR(EINVAL);
- x = bytestream2_get_be16u(&s->g);
+ x = bytestream2_get_be16u(&s->g);
q->expn[0] = x >> 11;
q->mant[0] = x & 0x7ff;
for (i = 1; i < 32 * 3; i++) {
- int curexpn = FFMAX(0, q->expn[0] - (i-1)/3);
+ int curexpn = FFMAX(0, q->expn[0] - (i - 1) / 3);
q->expn[i] = curexpn;
q->mant[i] = q->mant[0];
}
- } else{
+ } else {
n = (n - 3) >> 1;
if (bytestream2_get_bytes_left(&s->g) < 2 * n || 32*3 < n)
return AVERROR(EINVAL);
for (i = 0; i < n; i++) {
- x = bytestream2_get_be16u(&s->g);
+ x = bytestream2_get_be16u(&s->g);
q->expn[i] = x >> 11;
q->mant[i] = x & 0x7ff;
}
return 0;
}
-/** get quantization parameters for a particular tile or a whole image */
-static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)
+/* Get quantization parameters for a particular tile or a whole image. */
+static int get_qcd(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
+ uint8_t *properties)
{
Jpeg2000QuantStyle tmp;
int compno;
return -1;
for (compno = 0; compno < s->ncomponents; compno++)
if (!(properties[compno] & HAD_QCC))
- memcpy(q + compno, &tmp, sizeof(Jpeg2000QuantStyle));
+ memcpy(q + compno, &tmp, sizeof(tmp));
return 0;
}
-/** get quantization parameters for a component in the whole image on in a particular tile */
-static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q, uint8_t *properties)
+/* Get quantization parameters for a component in the whole image
+ * on in a particular tile. */
+static int get_qcc(Jpeg2000DecoderContext *s, int n, Jpeg2000QuantStyle *q,
+ uint8_t *properties)
{
int compno;
if (bytestream2_get_bytes_left(&s->g) < 1)
return AVERROR(EINVAL);
- compno = bytestream2_get_byteu(&s->g);
+ compno = bytestream2_get_byteu(&s->g);
properties[compno] |= HAD_QCC;
- return get_qcx(s, n-1, q+compno);
+ return get_qcx(s, n - 1, q + compno);
}
/** get start of tile segment */
return 0;
}
+/* Tile-part lengths: see ISO 15444-1:2002, section A.7.1
+ * Used to know the number of tile parts and lengths.
+ * There may be multiple TLMs in the header.
+ * TODO: The function is not used for tile-parts management, nor anywhere else.
+ * It can be useful to allocate memory for tile parts, before managing the SOT
+ * markers. Parsing the TLM header is needed to increment the input header
+ * buffer.
+ * This marker is mandatory for DCI. */
+static uint8_t get_tlm(Jpeg2000DecoderContext *s, int n)
+{
+ uint8_t Stlm, ST, SP, tile_tlm, i;
+ bytestream2_get_byte(&s->g); /* Ztlm: skipped */
+ Stlm = bytestream2_get_byte(&s->g);
+
+ // too complex ? ST = ((Stlm >> 4) & 0x01) + ((Stlm >> 4) & 0x02);
+ ST = (Stlm >> 4) & 0x03;
+ // TODO: Manage case of ST = 0b11 --> raise error
+ SP = (Stlm >> 6) & 0x01;
+ tile_tlm = (n - 4) / ((SP + 1) * 2 + ST);
+ for (i = 0; i < tile_tlm; i++) {
+ switch (ST) {
+ case 0:
+ break;
+ case 1:
+ bytestream2_get_byte(&s->g);
+ break;
+ case 2:
+ bytestream2_get_be16(&s->g);
+ break;
+ case 3:
+ bytestream2_get_be32(&s->g);
+ break;
+ }
+ if (SP == 0) {
+ bytestream2_get_be16(&s->g);
+ } else {
+ bytestream2_get_be32(&s->g);
+ }
+ }
+ return 0;
+}
+
static int init_tile(Jpeg2000DecoderContext *s, int tileno)
{
- int compno,
- tilex = tileno % s->numXtiles,
- tiley = tileno / s->numXtiles;
+ int compno;
+ int tilex = tileno % s->numXtiles;
+ int tiley = tileno / s->numXtiles;
Jpeg2000Tile *tile = s->tile + tileno;
if (!tile->comp)
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
int ret; // global bandno
- comp->coord[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
- comp->coord[0][1] = FFMIN((tilex+1)*s->tile_width + s->tile_offset_x, s->width);
- comp->coord[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
- comp->coord[1][1] = FFMIN((tiley+1)*s->tile_height + s->tile_offset_y, s->height);
+ comp->coord_o[0][0] = FFMAX(tilex * s->tile_width + s->tile_offset_x, s->image_offset_x);
+ comp->coord_o[0][1] = FFMIN((tilex + 1) * s->tile_width + s->tile_offset_x, s->width);
+ comp->coord_o[1][0] = FFMAX(tiley * s->tile_height + s->tile_offset_y, s->image_offset_y);
+ comp->coord_o[1][1] = FFMIN((tiley + 1) * s->tile_height + s->tile_offset_y, s->height);
- if (ret = ff_j2k_init_component(comp, codsty, qntsty, s->cbps[compno], s->cdx[compno], s->cdy[compno]))
+ comp->coord[0][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][0], s->reduction_factor);
+ comp->coord[0][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[0][1], s->reduction_factor);
+ comp->coord[1][0] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][0], s->reduction_factor);
+ comp->coord[1][1] = ff_jpeg2000_ceildivpow2(comp->coord_o[1][1], s->reduction_factor);
+
+ if (ret = ff_j2k_init_component(comp, codsty, qntsty, s->cbps[compno], s->cdx[compno], s->cdy[compno], s->avctx))
return ret;
}
return 0;
return res;
}
-static int decode_packet(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000ResLevel *rlevel, int precno,
+static int decode_packet(Jpeg2000DecoderContext *s,
+ Jpeg2000CodingStyle *codsty,
+ Jpeg2000ResLevel *rlevel, int precno,
int layno, uint8_t *expn, int numgbits)
{
- int bandno, cblkny, cblknx, cblkno, ret;
+ int bandno, cblkno, ret, nb_code_blocks;
if (!(ret = get_bits(s, 1))) {
j2k_flush(s);
for (bandno = 0; bandno < rlevel->nbands; bandno++) {
Jpeg2000Band *band = rlevel->band + bandno;
Jpeg2000Prec *prec = band->prec + precno;
- int pos = 0;
- if (band->coord[0][0] == band->coord[0][1]
- || band->coord[1][0] == band->coord[1][1])
+ if (band->coord[0][0] == band->coord[0][1] ||
+ band->coord[1][0] == band->coord[1][1])
continue;
- for (cblkny = prec->yi0; cblkny < prec->yi1; cblkny++)
- for (cblknx = prec->xi0, cblkno = cblkny * band->cblknx + cblknx; cblknx < prec->xi1; cblknx++, cblkno++, pos++) {
- Jpeg2000Cblk *cblk = band->cblk + cblkno;
- int incl, newpasses, llen;
+ nb_code_blocks = prec->nb_codeblocks_height *
+ prec->nb_codeblocks_width;
+ for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
+ Jpeg2000Cblk *cblk = prec->cblk + cblkno;
+ int incl, newpasses, llen;
- if (cblk->npasses)
- incl = get_bits(s, 1);
- else
- incl = tag_tree_decode(s, prec->cblkincl + pos, layno+1) == layno;
- if (!incl)
- continue;
- else if (incl < 0)
- return incl;
-
- if (!cblk->npasses)
- cblk->nonzerobits = expn[bandno] + numgbits - 1 - tag_tree_decode(s, prec->zerobits + pos, 100);
- if ((newpasses = getnpasses(s)) < 0)
- return newpasses;
- if ((llen = getlblockinc(s)) < 0)
- return llen;
- cblk->lblock += llen;
- if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
- return ret;
- cblk->lengthinc = ret;
- cblk->npasses += newpasses;
- }
+ if (cblk->npasses)
+ incl = get_bits(s, 1);
+ else
+ incl = tag_tree_decode(s, prec->cblkincl + cblkno, layno + 1) == layno;
+ if (!incl)
+ continue;
+ else if (incl < 0)
+ return incl;
+
+ if (!cblk->npasses)
+ cblk->nonzerobits = expn[bandno] + numgbits - 1 -
+ tag_tree_decode(s, prec->zerobits + cblkno,
+ 100);
+ if ((newpasses = getnpasses(s)) < 0)
+ return newpasses;
+ if ((llen = getlblockinc(s)) < 0)
+ return llen;
+ cblk->lblock += llen;
+ if ((ret = get_bits(s, av_log2(newpasses) + cblk->lblock)) < 0)
+ return ret;
+ cblk->lengthinc = ret;
+ cblk->npasses += newpasses;
+ }
}
j2k_flush(s);
if (codsty->csty & JPEG2000_CSTY_EPH) {
- if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH) {
+ if (bytestream2_peek_be16(&s->g) == JPEG2000_EPH)
bytestream2_skip(&s->g, 2);
- } else {
+ else
av_log(s->avctx, AV_LOG_ERROR, "EPH marker not found.\n");
- }
}
for (bandno = 0; bandno < rlevel->nbands; bandno++) {
Jpeg2000Band *band = rlevel->band + bandno;
- int yi, cblknw = band->prec[precno].xi1 - band->prec[precno].xi0;
- for (yi = band->prec[precno].yi0; yi < band->prec[precno].yi1; yi++) {
- int xi;
- for (xi = band->prec[precno].xi0; xi < band->prec[precno].xi1; xi++) {
- Jpeg2000Cblk *cblk = band->cblk + yi * cblknw + xi;
- if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc
- || sizeof(cblk->data) < cblk->lengthinc
- )
- return AVERROR(EINVAL);
- bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);
- cblk->length += cblk->lengthinc;
- cblk->lengthinc = 0;
+ Jpeg2000Prec *prec = band->prec + precno;
+
+ nb_code_blocks = prec->nb_codeblocks_height * prec->nb_codeblocks_width;
+ for (cblkno = 0; cblkno < nb_code_blocks; cblkno++) {
+ Jpeg2000Cblk *cblk = prec->cblk + cblkno;
+ if ( bytestream2_get_bytes_left(&s->g) < cblk->lengthinc
+ || sizeof(cblk->data) < cblk->lengthinc
+ )
+ return AVERROR(EINVAL);
+ /* Code-block data can be empty. In that case initialize data
+ * with 0xFFFF. */
+ if (cblk->lengthinc > 0) {
+ bytestream2_get_bufferu(&s->g, cblk->data, cblk->lengthinc);
+ } else {
+ cblk->data[0] = 0xFF;
+ cblk->data[1] = 0xFF;
}
+ cblk->length += cblk->lengthinc;
+ cblk->lengthinc = 0;
}
}
return 0;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
Jpeg2000QuantStyle *qntsty = tile->qntsty + compno;
if (reslevelno < codsty->nreslevels) {
- Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel + reslevelno;
+ Jpeg2000ResLevel *rlevel = tile->comp[compno].reslevel +
+ reslevelno;
ok_reslevel = 1;
for (precno = 0; precno < rlevel->num_precincts_x * rlevel->num_precincts_y; precno++) {
- if (decode_packet(s, codsty, rlevel, precno, layno, qntsty->expn +
- (reslevelno ? 3*(reslevelno-1)+1 : 0), qntsty->nguardbits))
+ if (decode_packet(s,
+ codsty, rlevel,
+ precno, layno,
+ qntsty->expn + (reslevelno ? 3*(reslevelno-1)+1 : 0),
+ qntsty->nguardbits))
return -1;
}
}
}
/* TIER-1 routines */
-static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height, int bpno, int bandno, int bpass_csty_symbol,
+static void decode_sigpass(Jpeg2000T1Context *t1, int width, int height,
+ int bpno, int bandno, int bpass_csty_symbol,
int vert_causal_ctx_csty_symbol)
{
int mask = 3 << (bpno - 1), y0, x, y;
for (y0 = 0; y0 < height; y0 += 4)
for (x = 0; x < width; x++)
- for (y = y0; y < height && y < y0+4; y++) {
+ for (y = y0; y < height && y < y0 + 4; y++) {
if ((t1->flags[y+1][x+1] & JPEG2000_T1_SIG_NB)
&& !(t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS))) {
int flags_mask = -1;
ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);
}
- t1->flags[y+1][x+1] |= JPEG2000_T1_VIS;
+ t1->flags[y + 1][x + 1] |= JPEG2000_T1_VIS;
}
}
}
-static void decode_refpass(Jpeg2000T1Context *t1, int width, int height, int bpno)
+static void decode_refpass(Jpeg2000T1Context *t1, int width, int height,
+ int bpno)
{
int phalf, nhalf;
int y0, x, y;
for (y0 = 0; y0 < height; y0 += 4)
for (x = 0; x < width; x++)
- for (y = y0; y < height && y < y0+4; y++) {
- if ((t1->flags[y+1][x+1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
- int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y+1][x+1]);
- int r = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ? phalf : nhalf;
- t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
- t1->flags[y+1][x+1] |= JPEG2000_T1_REF;
+ for (y = y0; y < height && y < y0 + 4; y++)
+ if ((t1->flags[y + 1][x + 1] & (JPEG2000_T1_SIG | JPEG2000_T1_VIS)) == JPEG2000_T1_SIG) {
+ int ctxno = ff_jpeg2000_getrefctxno(t1->flags[y + 1][x + 1]);
+ int r = ff_mqc_decode(&t1->mqc,
+ t1->mqc.cx_states + ctxno)
+ ? phalf : nhalf;
+ t1->data[y][x] += t1->data[y][x] < 0 ? -r : r;
+ t1->flags[y + 1][x + 1] |= JPEG2000_T1_REF;
}
- }
}
-static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1, int width, int height,
- int bpno, int bandno, int seg_symbols, int vert_causal_ctx_csty_symbol)
+static void decode_clnpass(Jpeg2000DecoderContext *s, Jpeg2000T1Context *t1,
+ int width, int height, int bpno, int bandno,
+ int seg_symbols, int vert_causal_ctx_csty_symbol)
{
int mask = 3 << (bpno - 1), y0, x, y, runlen, dec;
for (y0 = 0; y0 < height; y0 += 4) {
for (x = 0; x < width; x++) {
- if (y0 + 3 < height && !(
- (t1->flags[y0+1][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
- (t1->flags[y0+2][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
- (t1->flags[y0+3][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
- (t1->flags[y0+4][x+1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
+ if (y0 + 3 < height &&
+ !((t1->flags[y0 + 1][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
+ (t1->flags[y0 + 2][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
+ (t1->flags[y0 + 3][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)) ||
+ (t1->flags[y0 + 4][x + 1] & (JPEG2000_T1_SIG_NB | JPEG2000_T1_VIS | JPEG2000_T1_SIG)))) {
if (!ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_RL))
continue;
- runlen = ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
- runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
+ runlen = ff_mqc_decode(&t1->mqc,
+ t1->mqc.cx_states + MQC_CX_UNI);
+ runlen = (runlen << 1) | ff_mqc_decode(&t1->mqc,
+ t1->mqc.cx_states +
+ MQC_CX_UNI);
dec = 1;
- } else{
+ } else {
runlen = 0;
- dec = 0;
+ dec = 0;
}
for (y = y0 + runlen; y < y0 + 4 && y < height; y++) {
}
}
if (dec) {
- int xorbit, ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y+1][x+1], &xorbit);
- t1->data[y][x] = (ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + ctxno) ^ xorbit) ? -mask : mask;
+ int xorbit;
+ int ctxno = ff_jpeg2000_getsgnctxno(t1->flags[y + 1][x + 1],
+ &xorbit);
+ t1->data[y][x] = (ff_mqc_decode(&t1->mqc,
+ t1->mqc.cx_states + ctxno) ^
+ xorbit)
+ ? -mask : mask;
ff_j2k_set_significant(t1, x, y, t1->data[y][x] < 0);
}
dec = 0;
- t1->flags[y+1][x+1] &= ~JPEG2000_T1_VIS;
+ t1->flags[y + 1][x + 1] &= ~JPEG2000_T1_VIS;
}
}
}
val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
val = (val << 1) + ff_mqc_decode(&t1->mqc, t1->mqc.cx_states + MQC_CX_UNI);
- if (val != 0xa) {
- av_log(s->avctx, AV_LOG_ERROR,"Segmentation symbol value incorrect\n");
- }
+ if (val != 0xa)
+ av_log(s->avctx, AV_LOG_ERROR,
+ "Segmentation symbol value incorrect\n");
}
}
-static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty, Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
+static int decode_cblk(Jpeg2000DecoderContext *s, Jpeg2000CodingStyle *codsty,
+ Jpeg2000T1Context *t1, Jpeg2000Cblk *cblk,
int width, int height, int bandpos)
{
int passno = cblk->npasses, pass_t = 2, bpno = cblk->nonzerobits - 1, y, clnpass_cnt = 0;
while (passno--) {
switch(pass_t) {
- case 0: decode_sigpass(t1, width, height, bpno+1, bandpos,
- bpass_csty_symbol && (clnpass_cnt >= 4), vert_causal_ctx_csty_symbol);
- break;
- case 1: decode_refpass(t1, width, height, bpno+1);
- if (bpass_csty_symbol && clnpass_cnt >= 4)
- ff_mqc_initdec(&t1->mqc, cblk->data);
- break;
- case 2: decode_clnpass(s, t1, width, height, bpno+1, bandpos,
- codsty->cblk_style & JPEG2000_CBLK_SEGSYM, vert_causal_ctx_csty_symbol);
- clnpass_cnt = clnpass_cnt + 1;
- if (bpass_csty_symbol && clnpass_cnt >= 4)
- ff_mqc_initdec(&t1->mqc, cblk->data);
- break;
+ case 0:
+ decode_sigpass(t1, width, height, bpno+1, bandpos,
+ bpass_csty_symbol && (clnpass_cnt >= 4), vert_causal_ctx_csty_symbol);
+ break;
+ case 1:
+ decode_refpass(t1, width, height, bpno+1);
+ if (bpass_csty_symbol && clnpass_cnt >= 4)
+ ff_mqc_initdec(&t1->mqc, cblk->data);
+ break;
+ case 2:
+ decode_clnpass(s, t1, width, height, bpno+1, bandpos,
+ codsty->cblk_style & JPEG2000_CBLK_SEGSYM, vert_causal_ctx_csty_symbol);
+ clnpass_cnt = clnpass_cnt + 1;
+ if (bpass_csty_symbol && clnpass_cnt >= 4)
+ ff_mqc_initdec(&t1->mqc, cblk->data);
+ break;
}
pass_t++;
uint8_t *line;
Jpeg2000T1Context t1;
+ /* Loop on tile components */
for (compno = 0; compno < s->ncomponents; compno++) {
Jpeg2000Component *comp = tile->comp + compno;
Jpeg2000CodingStyle *codsty = tile->codsty + compno;
- for (reslevelno = 0; reslevelno < codsty->nreslevels; reslevelno++) {
+ /* Loop on resolution levels */
+ for (reslevelno = 0; reslevelno < codsty->nreslevels2decode; reslevelno++) {
Jpeg2000ResLevel *rlevel = comp->reslevel + reslevelno;
+ /* Loop on bands */
for (bandno = 0; bandno < rlevel->nbands; bandno++) {
+ int nb_precincts, precno;
Jpeg2000Band *band = rlevel->band + bandno;
- int cblkx, cblky, cblkno=0, xx0, x0, xx1, y0, yy0, yy1, bandpos;
+ int cblkx, cblky, cblkno=0, bandpos;
bandpos = bandno + (reslevelno > 0);
- yy0 = bandno == 0 ? 0 : comp->reslevel[reslevelno-1].coord[1][1] - comp->reslevel[reslevelno-1].coord[1][0];
- y0 = yy0;
- yy1 = FFMIN(ff_jpeg2000_ceildiv(band->coord[1][0] + 1, band->codeblock_height) * band->codeblock_height,
- band->coord[1][1]) - band->coord[1][0] + yy0;
-
if (band->coord[0][0] == band->coord[0][1] || band->coord[1][0] == band->coord[1][1])
continue;
- for (cblky = 0; cblky < band->cblkny; cblky++) {
- if (reslevelno == 0 || bandno == 1)
- xx0 = 0;
- else
- xx0 = comp->reslevel[reslevelno-1].coord[0][1] - comp->reslevel[reslevelno-1].coord[0][0];
- x0 = xx0;
- xx1 = FFMIN(ff_jpeg2000_ceildiv(band->coord[0][0] + 1, band->codeblock_width) * band->codeblock_width,
- band->coord[0][1]) - band->coord[0][0] + xx0;
-
- for (cblkx = 0; cblkx < band->cblknx; cblkx++, cblkno++) {
- int y, x;
- decode_cblk(s, codsty, &t1, band->cblk + cblkno, xx1 - xx0, yy1 - yy0, bandpos);
+ nb_precincts = rlevel->num_precincts_x * rlevel->num_precincts_y;
+ /* Loop on precincts */
+ for (precno = 0; precno < nb_precincts; precno++) {
+ Jpeg2000Prec *prec = band->prec + precno;
+
+ /* Loop on codeblocks */
+ for (cblkno = 0; cblkno < prec->nb_codeblocks_width * prec->nb_codeblocks_height; cblkno++) {
+ int x, y;
+ int i, j;
+ Jpeg2000Cblk *cblk = prec->cblk + cblkno;
+ decode_cblk(s, codsty, &t1, cblk,
+ cblk->coord[0][1] - cblk->coord[0][0],
+ cblk->coord[1][1] - cblk->coord[1][0],
+ bandpos);
+
+ /* Manage band offsets */
+ x = cblk->coord[0][0];
+ y = cblk->coord[1][0];
+
if (codsty->transform == FF_DWT53) {
- for (y = yy0; y < yy1; y+=s->cdy[compno]) {
- int *ptr = t1.data[y-yy0];
- for (x = xx0; x < xx1; x+=s->cdx[compno]) {
- comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = *ptr++ >> 1;
+ for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
+ int *datap = &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * (y+j) + x];
+ int *ptr = t1.data[j];
+ for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
+ datap[i] = ptr[i] >> 1;
}
}
} else{
- for (y = yy0; y < yy1; y+=s->cdy[compno]) {
- int *ptr = t1.data[y-yy0];
- for (x = xx0; x < xx1; x+=s->cdx[compno]) {
- int tmp = ((int64_t)*ptr++) * ((int64_t)band->stepsize) >> 13, tmp2;
+ for (j = 0; j < (cblk->coord[1][1] - cblk->coord[1][0]); ++j) {
+ int *datap = &comp->data[(comp->coord[0][1] - comp->coord[0][0]) * (y+j) + x];
+ int *ptr = t1.data[j];
+ for (i = 0; i < (cblk->coord[0][1] - cblk->coord[0][0]); ++i) {
+ int tmp = ((int64_t)ptr[i]) * ((int64_t)band->stepsize) >> 16, tmp2;
tmp2 = FFABS(tmp>>1) + (tmp&1);
- comp->data[(comp->coord[0][1] - comp->coord[0][0]) * y + x] = tmp < 0 ? -tmp2 : tmp2;
+ datap[i] = tmp < 0 ? -tmp2 : tmp2;
}
}
}
- xx0 = xx1;
- xx1 = FFMIN(xx1 + band->codeblock_width, band->coord[0][1] - band->coord[0][0] + x0);
- }
- yy0 = yy1;
- yy1 = FFMIN(yy1 + band->codeblock_height, band->coord[1][1] - band->coord[1][0] + y0);
- }
- }
- }
- ff_j2k_dwt_decode(&comp->dwt, comp->data);
+ } /* end cblk */
+ } /*end prec */
+ } /* end band */
+ } /* end reslevel */
+
+ ff_dwt_decode(&comp->dwt, comp->data);
src[compno] = comp->data;
- }
+ } /*end comp */
+
+ /* inverse MCT transformation */
if (tile->codsty[0].mct)
mct_decode(s, tile);
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;
+ x = tile->comp[compno].coord[0][0] - s->image_offset_x;
dst = line + x * s->ncomponents + compno;
for (; x < tile->comp[compno].coord[0][1] - s->image_offset_x; x += s->cdx[compno]) {
return 0;
}
-static void cleanup(Jpeg2000DecoderContext *s)
+static void jpeg2000_dec_cleanup(Jpeg2000DecoderContext *s)
{
int tileno, compno;
for (tileno = 0; tileno < s->numXtiles * s->numYtiles; tileno++) {
for (compno = 0; compno < s->ncomponents; compno++) {
- Jpeg2000Component *comp = s->tile[tileno].comp + compno;
+ Jpeg2000Component *comp = s->tile[tileno].comp + compno;
Jpeg2000CodingStyle *codsty = s->tile[tileno].codsty + compno;
ff_j2k_cleanup(comp, codsty);
static int decode_codestream(Jpeg2000DecoderContext *s)
{
Jpeg2000CodingStyle *codsty = s->codsty;
- Jpeg2000QuantStyle *qntsty = s->qntsty;
- uint8_t *properties = s->properties;
+ Jpeg2000QuantStyle *qntsty = s->qntsty;
+ uint8_t *properties = s->properties;
for (;;) {
int oldpos, marker, len, ret = 0;
// the comment is ignored
bytestream2_skip(&s->g, len - 2);
break;
+ case JPEG2000_TLM:
+ // Tile-part lengths
+ ret = get_tlm(s, len);
+ break;
default:
- av_log(s->avctx, AV_LOG_ERROR, "unsupported marker 0x%.4X at pos 0x%x\n", marker, bytestream2_tell(&s->g) - 4);
+ av_log(s->avctx, AV_LOG_ERROR,
+ "unsupported marker 0x%.4X at pos 0x%x\n",
+ marker, bytestream2_tell(&s->g) - 4);
bytestream2_skip(&s->g, len - 2);
break;
}
if (bytestream2_tell(&s->g) - oldpos != len || ret) {
- av_log(s->avctx, AV_LOG_ERROR, "error during processing marker segment %.4x\n", marker);
+ av_log(s->avctx, AV_LOG_ERROR,
+ "error during processing marker segment %.4x\n", marker);
return ret ? ret : -1;
}
}
return 0;
}
-static int decode_frame(AVCodecContext *avctx,
- void *data, int *got_frame,
- AVPacket *avpkt)
+static int jpeg2000_decode_frame(AVCodecContext *avctx, void *data,
+ int *got_frame, AVPacket *avpkt)
{
Jpeg2000DecoderContext *s = avctx->priv_data;
AVFrame *picture = data;
bytestream2_init(&s->g, avpkt->data, avpkt->size);
s->curtileno = -1;
+ // reduction factor, i.e number of resolution levels to skip
+ s->reduction_factor = avctx->lowres;
+
if (bytestream2_get_bytes_left(&s->g) < 2) {
ret = AVERROR(EINVAL);
goto err_out;
if (ret = decode_tile(s, s->tile + tileno))
goto err_out;
- cleanup(s);
+ jpeg2000_dec_cleanup(s);
*got_frame = 1;
return bytestream2_tell(&s->g);
err_out:
- cleanup(s);
+ jpeg2000_dec_cleanup(s);
return ret;
}
ff_jpeg2000_init_tier1_luts();
}
+#define OFFSET(x) offsetof(Jpeg2000DecoderContext, x)
+#define VD AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_DECODING_PARAM
+
+static const AVOption options[] = {
+ { "lowres", "Lower the decoding resolution by a power of two",
+ OFFSET(lowres), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, JPEG2000_MAX_RESLEVELS - 1, VD },
+ { NULL },
+};
+
static const AVProfile profiles[] = {
{ FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0, "JPEG 2000 codestream restriction 0" },
{ FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1, "JPEG 2000 codestream restriction 1" },
{ FF_PROFILE_UNKNOWN },
};
+static const AVClass class = {
+ .class_name = "j2k",
+ .item_name = av_default_item_name,
+ .option = options,
+ .version = LIBAVUTIL_VERSION_INT,
+};
+
AVCodec ff_j2k_decoder = {
.name = "j2k",
.long_name = NULL_IF_CONFIG_SMALL("JPEG 2000"),
.capabilities = CODEC_CAP_EXPERIMENTAL | CODEC_CAP_FRAME_THREADS,
.priv_data_size = sizeof(Jpeg2000DecoderContext),
.init_static_data = jpeg2000_init_static_data,
- .decode = decode_frame,
+ .decode = jpeg2000_decode_frame,
+ .priv_class = &class,
+ .max_lowres = 5,
.profiles = NULL_IF_CONFIG_SMALL(profiles)
};
projects / ffmpeg / blobdiff