Modifications to decoding of JP2H box in order to be compatible with JP2 conformance files
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d6a523e091
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7f8f47566f
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@ -61,12 +61,11 @@ int jp2_read_boxhdr(jp2_box_t * box)
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if (cio_read(4) != 0) {
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fprintf(stderr, "Error: Cannot handle box sizes higher than 2^32\n");
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return 1;
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};
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}
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box->length = cio_read(4);
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if (box->length == 0)
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if (box->length == 0)
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box->length = cio_numbytesleft() + 12;
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}
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else if (box->length == 0) {
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} else if (box->length == 0) {
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box->length = cio_numbytesleft() + 8;
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}
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return 0;
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@ -80,7 +79,8 @@ int jp2_read_boxhdr(jp2_box_t * box)
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int jp2_init_stdjp2(jp2_struct_t * jp2_struct)
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{
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jp2_struct->comps = (jp2_comps_t *) malloc(jp2_struct->numcomps * sizeof(jp2_comps_t));
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jp2_struct->comps =
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(jp2_comps_t *) malloc(jp2_struct->numcomps * sizeof(jp2_comps_t));
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jp2_struct->precedence = 0; // PRECEDENCE
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jp2_struct->approx = 0; // APPROX
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@ -248,12 +248,15 @@ void jp2_write_colr(jp2_struct_t * jp2_struct)
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int jp2_read_colr(jp2_struct_t * jp2_struct)
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{
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jp2_box_t box;
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int skip_len;
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jp2_read_boxhdr(&box);
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if (JP2_COLR != box.type) {
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fprintf(stderr, "Error: Expected COLR Marker\n");
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return 1;
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}
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do {
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if (JP2_COLR != box.type) {
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cio_skip(box.length - 8);
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jp2_read_boxhdr(&box);
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}
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} while (JP2_COLR != box.type);
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jp2_struct->meth = cio_read(1); // METH
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jp2_struct->precedence = cio_read(1); // PRECEDENCE
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@ -261,8 +264,15 @@ int jp2_read_colr(jp2_struct_t * jp2_struct)
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if (jp2_struct->meth == 1)
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jp2_struct->enumcs = cio_read(4); // EnumCS
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else
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cio_read(1); // PROFILE
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else {
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// SKIP PROFILE
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skip_len = box.init_pos + box.length - cio_tell();
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if (skip_len < 0) {
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fprintf(stderr, "Error with JP2H box size\n");
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return 1;
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}
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cio_skip(box.init_pos + box.length - cio_tell());
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}
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if (cio_tell() - box.init_pos != box.length) {
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fprintf(stderr, "Error with BPCC Box\n");
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@ -307,26 +317,38 @@ void jp2_write_jp2h(jp2_struct_t * jp2_struct)
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int jp2_read_jp2h(jp2_struct_t * jp2_struct)
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{
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jp2_box_t box;
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int skip_len;
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jp2_read_boxhdr(&box);
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if (JP2_JP2H != box.type) {
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fprintf(stderr, "Error: Expected JP2H Marker\n");
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return 1;
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}
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do {
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if (JP2_JP2H != box.type) {
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if (box.type == JP2_JP2C) {
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fprintf(stderr, "Error: Expected JP2H Marker\n");
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return 1;
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}
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cio_skip(box.length - 8);
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jp2_read_boxhdr(&box);
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}
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} while (JP2_JP2H != box.type);
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if (jp2_read_ihdr(jp2_struct))
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return 1;
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if (jp2_struct->bpc == 255)
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if (jp2_struct->bpc == 255) {
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if (jp2_read_bpcc(jp2_struct))
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return 1;
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}
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if (jp2_read_colr(jp2_struct))
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return 1;
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if (cio_tell() - box.init_pos != box.length) {
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fprintf(stderr, "Error with JP2H Box\n");
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skip_len = box.init_pos + box.length - cio_tell();
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if (skip_len < 0) {
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fprintf(stderr, "Error with JP2H box size\n");
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return 1;
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}
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cio_skip(box.init_pos + box.length - cio_tell());
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return 0;
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}
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@ -381,17 +403,18 @@ int jp2_read_ftyp(jp2_struct_t * jp2_struct)
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jp2_struct->cl =
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(unsigned int *) malloc(jp2_struct->numcl * sizeof(unsigned int));
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for (i = 0; i < (int)jp2_struct->numcl; i++)
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for (i = 0; i < (int) jp2_struct->numcl; i++)
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jp2_struct->cl[i] = cio_read(4); /* CLi */
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if (cio_tell() - box.init_pos != box.length) {
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fprintf(stderr, "Error with FTYP Box\n");
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fprintf(stderr, "Error with FTYP Box\n");
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return 1;
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}
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return 0;
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}
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int jp2_write_jp2c(int j2k_codestream_len, int *j2k_codestream_offset, char *j2k_codestream)
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int jp2_write_jp2c(int j2k_codestream_len, int *j2k_codestream_offset,
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char *j2k_codestream)
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{
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jp2_box_t box;
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@ -400,7 +423,7 @@ int jp2_write_jp2c(int j2k_codestream_len, int *j2k_codestream_offset, char *j2k
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cio_write(JP2_JP2C, 4); // JP2C
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*j2k_codestream_offset = cio_tell();
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memcpy(cio_getbp(),j2k_codestream, j2k_codestream_len);
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memcpy(cio_getbp(), j2k_codestream, j2k_codestream_len);
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box.length = 8 + j2k_codestream_len;
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cio_seek(box.init_pos);
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@ -411,15 +434,18 @@ int jp2_write_jp2c(int j2k_codestream_len, int *j2k_codestream_offset, char *j2k
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}
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int jp2_read_jp2c(unsigned int *j2k_codestream_len, unsigned int *j2k_codestream_offset)
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int jp2_read_jp2c(unsigned int *j2k_codestream_len,
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unsigned int *j2k_codestream_offset)
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{
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jp2_box_t box;
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jp2_read_boxhdr(&box);
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if (JP2_JP2C != box.type) {
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fprintf(stderr, "Error: Expected JP2C Marker\n");
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return 1;
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}
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do {
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if (JP2_JP2C != box.type) {
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cio_skip(box.length - 8);
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jp2_read_boxhdr(&box);
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}
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} while (JP2_JP2C != box.type);
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*j2k_codestream_offset = cio_tell();
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*j2k_codestream_len = box.length - 8;
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@ -481,18 +507,22 @@ int jp2_read_struct(unsigned char *src, jp2_struct_t * jp2_struct, int len)
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return 1;
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if (jp2_read_jp2h(jp2_struct))
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return 1;
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if (jp2_read_jp2c(&jp2_struct->j2k_codestream_len, &jp2_struct->j2k_codestream_offset))
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if (jp2_read_jp2c
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(&jp2_struct->j2k_codestream_len,
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&jp2_struct->j2k_codestream_offset))
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return 1;
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return 0;
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}
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int jp2_wrap_j2k(jp2_struct_t * jp2_struct, char *j2k_codestream, char *output)
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int jp2_wrap_j2k(jp2_struct_t * jp2_struct, char *j2k_codestream,
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char *output)
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{
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jp2_write_jp();
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jp2_write_ftyp(jp2_struct);
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jp2_write_jp2h(jp2_struct);
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jp2_write_jp2c(jp2_struct->j2k_codestream_len, &jp2_struct->j2k_codestream_offset, j2k_codestream);
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jp2_write_jp2c(jp2_struct->j2k_codestream_len,
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&jp2_struct->j2k_codestream_offset, j2k_codestream);
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return cio_tell();
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}
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