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-rw-r--r--src/lib/libjpeg/jdmainct.c538
1 files changed, 269 insertions, 269 deletions
diff --git a/src/lib/libjpeg/jdmainct.c b/src/lib/libjpeg/jdmainct.c
index b1defa2facc..841f3b38c96 100644
--- a/src/lib/libjpeg/jdmainct.c
+++ b/src/lib/libjpeg/jdmainct.c
@@ -112,44 +112,44 @@
/* Private buffer controller object */
typedef struct {
- struct jpeg_d_main_controller pub; /* public fields */
+ struct jpeg_d_main_controller pub; /* public fields */
- /* Pointer to allocated workspace (M or M+2 row groups). */
- JSAMPARRAY buffer[MAX_COMPONENTS];
+ /* Pointer to allocated workspace (M or M+2 row groups). */
+ JSAMPARRAY buffer[MAX_COMPONENTS];
- boolean buffer_full; /* Have we gotten an iMCU row from decoder? */
- JDIMENSION rowgroup_ctr; /* counts row groups output to postprocessor */
+ boolean buffer_full; /* Have we gotten an iMCU row from decoder? */
+ JDIMENSION rowgroup_ctr; /* counts row groups output to postprocessor */
- /* Remaining fields are only used in the context case. */
+ /* Remaining fields are only used in the context case. */
- /* These are the master pointers to the funny-order pointer lists. */
- JSAMPIMAGE xbuffer[2]; /* pointers to weird pointer lists */
+ /* These are the master pointers to the funny-order pointer lists. */
+ JSAMPIMAGE xbuffer[2]; /* pointers to weird pointer lists */
- int whichptr; /* indicates which pointer set is now in use */
- int context_state; /* process_data state machine status */
- JDIMENSION rowgroups_avail; /* row groups available to postprocessor */
- JDIMENSION iMCU_row_ctr; /* counts iMCU rows to detect image top/bot */
+ int whichptr; /* indicates which pointer set is now in use */
+ int context_state; /* process_data state machine status */
+ JDIMENSION rowgroups_avail; /* row groups available to postprocessor */
+ JDIMENSION iMCU_row_ctr; /* counts iMCU rows to detect image top/bot */
} my_main_controller;
typedef my_main_controller * my_main_ptr;
/* context_state values: */
-#define CTX_PREPARE_FOR_IMCU 0 /* need to prepare for MCU row */
-#define CTX_PROCESS_IMCU 1 /* feeding iMCU to postprocessor */
-#define CTX_POSTPONED_ROW 2 /* feeding postponed row group */
+#define CTX_PREPARE_FOR_IMCU 0 /* need to prepare for MCU row */
+#define CTX_PROCESS_IMCU 1 /* feeding iMCU to postprocessor */
+#define CTX_POSTPONED_ROW 2 /* feeding postponed row group */
/* Forward declarations */
METHODDEF(void) process_data_simple_main
JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
- JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
+ JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
METHODDEF(void) process_data_context_main
JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
- JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
+ JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
#ifdef QUANT_2PASS_SUPPORTED
METHODDEF(void) process_data_crank_post
JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
- JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
+ JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
#endif
@@ -159,35 +159,35 @@ alloc_funny_pointers (j_decompress_ptr cinfo)
* This is done only once, not once per pass.
*/
{
- my_main_ptr mymain = (my_main_ptr) cinfo->main;
- int ci, rgroup;
- int M = cinfo->min_DCT_v_scaled_size;
- jpeg_component_info *compptr;
- JSAMPARRAY xbuf;
-
- /* Get top-level space for component array pointers.
- * We alloc both arrays with one call to save a few cycles.
- */
- mymain->xbuffer[0] = (JSAMPIMAGE)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ my_main_ptr mymain = (my_main_ptr) cinfo->main;
+ int ci, rgroup;
+ int M = cinfo->min_DCT_v_scaled_size;
+ jpeg_component_info *compptr;
+ JSAMPARRAY xbuf;
+
+ /* Get top-level space for component array pointers.
+ * We alloc both arrays with one call to save a few cycles.
+ */
+ mymain->xbuffer[0] = (JSAMPIMAGE)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
cinfo->num_components * 2 * SIZEOF(JSAMPARRAY));
- mymain->xbuffer[1] = mymain->xbuffer[0] + cinfo->num_components;
-
- for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
- ci++, compptr++) {
- rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
- cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
- /* Get space for pointer lists --- M+4 row groups in each list.
- * We alloc both pointer lists with one call to save a few cycles.
- */
- xbuf = (JSAMPARRAY)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
- 2 * (rgroup * (M + 4)) * SIZEOF(JSAMPROW));
- xbuf += rgroup; /* want one row group at negative offsets */
- mymain->xbuffer[0][ci] = xbuf;
- xbuf += rgroup * (M + 4);
- mymain->xbuffer[1][ci] = xbuf;
- }
+ mymain->xbuffer[1] = mymain->xbuffer[0] + cinfo->num_components;
+
+ for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ ci++, compptr++) {
+ rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
+ cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
+ /* Get space for pointer lists --- M+4 row groups in each list.
+ * We alloc both pointer lists with one call to save a few cycles.
+ */
+ xbuf = (JSAMPARRAY)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ 2 * (rgroup * (M + 4)) * SIZEOF(JSAMPROW));
+ xbuf += rgroup; /* want one row group at negative offsets */
+ mymain->xbuffer[0][ci] = xbuf;
+ xbuf += rgroup * (M + 4);
+ mymain->xbuffer[1][ci] = xbuf;
+ }
}
@@ -200,37 +200,37 @@ make_funny_pointers (j_decompress_ptr cinfo)
* This will be repeated at the beginning of each pass.
*/
{
- my_main_ptr mymain = (my_main_ptr) cinfo->main;
- int ci, i, rgroup;
- int M = cinfo->min_DCT_v_scaled_size;
- jpeg_component_info *compptr;
- JSAMPARRAY buf, xbuf0, xbuf1;
-
- for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
- ci++, compptr++) {
- rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
- cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
- xbuf0 = mymain->xbuffer[0][ci];
- xbuf1 = mymain->xbuffer[1][ci];
- /* First copy the workspace pointers as-is */
- buf = mymain->buffer[ci];
- for (i = 0; i < rgroup * (M + 2); i++) {
- xbuf0[i] = xbuf1[i] = buf[i];
- }
- /* In the second list, put the last four row groups in swapped order */
- for (i = 0; i < rgroup * 2; i++) {
- xbuf1[rgroup*(M-2) + i] = buf[rgroup*M + i];
- xbuf1[rgroup*M + i] = buf[rgroup*(M-2) + i];
- }
- /* The wraparound pointers at top and bottom will be filled later
- * (see set_wraparound_pointers, below). Initially we want the "above"
- * pointers to duplicate the first actual data line. This only needs
- * to happen in xbuffer[0].
- */
- for (i = 0; i < rgroup; i++) {
- xbuf0[i - rgroup] = xbuf0[0];
- }
- }
+ my_main_ptr mymain = (my_main_ptr) cinfo->main;
+ int ci, i, rgroup;
+ int M = cinfo->min_DCT_v_scaled_size;
+ jpeg_component_info *compptr;
+ JSAMPARRAY buf, xbuf0, xbuf1;
+
+ for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ ci++, compptr++) {
+ rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
+ cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
+ xbuf0 = mymain->xbuffer[0][ci];
+ xbuf1 = mymain->xbuffer[1][ci];
+ /* First copy the workspace pointers as-is */
+ buf = mymain->buffer[ci];
+ for (i = 0; i < rgroup * (M + 2); i++) {
+ xbuf0[i] = xbuf1[i] = buf[i];
+ }
+ /* In the second list, put the last four row groups in swapped order */
+ for (i = 0; i < rgroup * 2; i++) {
+ xbuf1[rgroup*(M-2) + i] = buf[rgroup*M + i];
+ xbuf1[rgroup*M + i] = buf[rgroup*(M-2) + i];
+ }
+ /* The wraparound pointers at top and bottom will be filled later
+ * (see set_wraparound_pointers, below). Initially we want the "above"
+ * pointers to duplicate the first actual data line. This only needs
+ * to happen in xbuffer[0].
+ */
+ for (i = 0; i < rgroup; i++) {
+ xbuf0[i - rgroup] = xbuf0[0];
+ }
+ }
}
@@ -240,25 +240,25 @@ set_wraparound_pointers (j_decompress_ptr cinfo)
* This changes the pointer list state from top-of-image to the normal state.
*/
{
- my_main_ptr mymain = (my_main_ptr) cinfo->main;
- int ci, i, rgroup;
- int M = cinfo->min_DCT_v_scaled_size;
- jpeg_component_info *compptr;
- JSAMPARRAY xbuf0, xbuf1;
-
- for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
- ci++, compptr++) {
- rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
- cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
- xbuf0 = mymain->xbuffer[0][ci];
- xbuf1 = mymain->xbuffer[1][ci];
- for (i = 0; i < rgroup; i++) {
- xbuf0[i - rgroup] = xbuf0[rgroup*(M+1) + i];
- xbuf1[i - rgroup] = xbuf1[rgroup*(M+1) + i];
- xbuf0[rgroup*(M+2) + i] = xbuf0[i];
- xbuf1[rgroup*(M+2) + i] = xbuf1[i];
- }
- }
+ my_main_ptr mymain = (my_main_ptr) cinfo->main;
+ int ci, i, rgroup;
+ int M = cinfo->min_DCT_v_scaled_size;
+ jpeg_component_info *compptr;
+ JSAMPARRAY xbuf0, xbuf1;
+
+ for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ ci++, compptr++) {
+ rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
+ cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
+ xbuf0 = mymain->xbuffer[0][ci];
+ xbuf1 = mymain->xbuffer[1][ci];
+ for (i = 0; i < rgroup; i++) {
+ xbuf0[i - rgroup] = xbuf0[rgroup*(M+1) + i];
+ xbuf1[i - rgroup] = xbuf1[rgroup*(M+1) + i];
+ xbuf0[rgroup*(M+2) + i] = xbuf0[i];
+ xbuf1[rgroup*(M+2) + i] = xbuf1[i];
+ }
+ }
}
@@ -269,33 +269,33 @@ set_bottom_pointers (j_decompress_ptr cinfo)
* Also sets rowgroups_avail to indicate number of nondummy row groups in row.
*/
{
- my_main_ptr mymain = (my_main_ptr) cinfo->main;
- int ci, i, rgroup, iMCUheight, rows_left;
- jpeg_component_info *compptr;
- JSAMPARRAY xbuf;
-
- for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
- ci++, compptr++) {
- /* Count sample rows in one iMCU row and in one row group */
- iMCUheight = compptr->v_samp_factor * compptr->DCT_v_scaled_size;
- rgroup = iMCUheight / cinfo->min_DCT_v_scaled_size;
- /* Count nondummy sample rows remaining for this component */
- rows_left = (int) (compptr->downsampled_height % (JDIMENSION) iMCUheight);
- if (rows_left == 0) rows_left = iMCUheight;
- /* Count nondummy row groups. Should get same answer for each component,
- * so we need only do it once.
- */
- if (ci == 0) {
- mymain->rowgroups_avail = (JDIMENSION) ((rows_left-1) / rgroup + 1);
- }
- /* Duplicate the last real sample row rgroup*2 times; this pads out the
- * last partial rowgroup and ensures at least one full rowgroup of context.
- */
- xbuf = mymain->xbuffer[mymain->whichptr][ci];
- for (i = 0; i < rgroup * 2; i++) {
- xbuf[rows_left + i] = xbuf[rows_left-1];
- }
- }
+ my_main_ptr mymain = (my_main_ptr) cinfo->main;
+ int ci, i, rgroup, iMCUheight, rows_left;
+ jpeg_component_info *compptr;
+ JSAMPARRAY xbuf;
+
+ for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ ci++, compptr++) {
+ /* Count sample rows in one iMCU row and in one row group */
+ iMCUheight = compptr->v_samp_factor * compptr->DCT_v_scaled_size;
+ rgroup = iMCUheight / cinfo->min_DCT_v_scaled_size;
+ /* Count nondummy sample rows remaining for this component */
+ rows_left = (int) (compptr->downsampled_height % (JDIMENSION) iMCUheight);
+ if (rows_left == 0) rows_left = iMCUheight;
+ /* Count nondummy row groups. Should get same answer for each component,
+ * so we need only do it once.
+ */
+ if (ci == 0) {
+ mymain->rowgroups_avail = (JDIMENSION) ((rows_left-1) / rgroup + 1);
+ }
+ /* Duplicate the last real sample row rgroup*2 times; this pads out the
+ * last partial rowgroup and ensures at least one full rowgroup of context.
+ */
+ xbuf = mymain->xbuffer[mymain->whichptr][ci];
+ for (i = 0; i < rgroup * 2; i++) {
+ xbuf[rows_left + i] = xbuf[rows_left-1];
+ }
+ }
}
@@ -306,33 +306,33 @@ set_bottom_pointers (j_decompress_ptr cinfo)
METHODDEF(void)
start_pass_main (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
{
- my_main_ptr mymain = (my_main_ptr) cinfo->main;
-
- switch (pass_mode) {
- case JBUF_PASS_THRU:
- if (cinfo->upsample->need_context_rows) {
- mymain->pub.process_data = process_data_context_main;
- make_funny_pointers(cinfo); /* Create the xbuffer[] lists */
- mymain->whichptr = 0; /* Read first iMCU row into xbuffer[0] */
- mymain->context_state = CTX_PREPARE_FOR_IMCU;
- mymain->iMCU_row_ctr = 0;
- } else {
- /* Simple case with no context needed */
- mymain->pub.process_data = process_data_simple_main;
- }
- mymain->buffer_full = FALSE; /* Mark buffer empty */
- mymain->rowgroup_ctr = 0;
- break;
+ my_main_ptr mymain = (my_main_ptr) cinfo->main;
+
+ switch (pass_mode) {
+ case JBUF_PASS_THRU:
+ if (cinfo->upsample->need_context_rows) {
+ mymain->pub.process_data = process_data_context_main;
+ make_funny_pointers(cinfo); /* Create the xbuffer[] lists */
+ mymain->whichptr = 0; /* Read first iMCU row into xbuffer[0] */
+ mymain->context_state = CTX_PREPARE_FOR_IMCU;
+ mymain->iMCU_row_ctr = 0;
+ } else {
+ /* Simple case with no context needed */
+ mymain->pub.process_data = process_data_simple_main;
+ }
+ mymain->buffer_full = FALSE; /* Mark buffer empty */
+ mymain->rowgroup_ctr = 0;
+ break;
#ifdef QUANT_2PASS_SUPPORTED
- case JBUF_CRANK_DEST:
- /* For last pass of 2-pass quantization, just crank the postprocessor */
- mymain->pub.process_data = process_data_crank_post;
- break;
+ case JBUF_CRANK_DEST:
+ /* For last pass of 2-pass quantization, just crank the postprocessor */
+ mymain->pub.process_data = process_data_crank_post;
+ break;
#endif
- default:
- ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
- break;
- }
+ default:
+ ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+ break;
+ }
}
@@ -343,36 +343,36 @@ start_pass_main (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
METHODDEF(void)
process_data_simple_main (j_decompress_ptr cinfo,
- JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
- JDIMENSION out_rows_avail)
+ JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+ JDIMENSION out_rows_avail)
{
- my_main_ptr mymain = (my_main_ptr) cinfo->main;
- JDIMENSION rowgroups_avail;
-
- /* Read input data if we haven't filled the main buffer yet */
- if (! mymain->buffer_full) {
- if (! (*cinfo->coef->decompress_data) (cinfo, mymain->buffer))
- return; /* suspension forced, can do nothing more */
- mymain->buffer_full = TRUE; /* OK, we have an iMCU row to work with */
- }
-
- /* There are always min_DCT_scaled_size row groups in an iMCU row. */
- rowgroups_avail = (JDIMENSION) cinfo->min_DCT_v_scaled_size;
- /* Note: at the bottom of the image, we may pass extra garbage row groups
- * to the postprocessor. The postprocessor has to check for bottom
- * of image anyway (at row resolution), so no point in us doing it too.
- */
-
- /* Feed the postprocessor */
- (*cinfo->post->post_process_data) (cinfo, mymain->buffer,
- &mymain->rowgroup_ctr, rowgroups_avail,
- output_buf, out_row_ctr, out_rows_avail);
-
- /* Has postprocessor consumed all the data yet? If so, mark buffer empty */
- if (mymain->rowgroup_ctr >= rowgroups_avail) {
- mymain->buffer_full = FALSE;
- mymain->rowgroup_ctr = 0;
- }
+ my_main_ptr mymain = (my_main_ptr) cinfo->main;
+ JDIMENSION rowgroups_avail;
+
+ /* Read input data if we haven't filled the main buffer yet */
+ if (! mymain->buffer_full) {
+ if (! (*cinfo->coef->decompress_data) (cinfo, mymain->buffer))
+ return; /* suspension forced, can do nothing more */
+ mymain->buffer_full = TRUE; /* OK, we have an iMCU row to work with */
+ }
+
+ /* There are always min_DCT_scaled_size row groups in an iMCU row. */
+ rowgroups_avail = (JDIMENSION) cinfo->min_DCT_v_scaled_size;
+ /* Note: at the bottom of the image, we may pass extra garbage row groups
+ * to the postprocessor. The postprocessor has to check for bottom
+ * of image anyway (at row resolution), so no point in us doing it too.
+ */
+
+ /* Feed the postprocessor */
+ (*cinfo->post->post_process_data) (cinfo, mymain->buffer,
+ &mymain->rowgroup_ctr, rowgroups_avail,
+ output_buf, out_row_ctr, out_rows_avail);
+
+ /* Has postprocessor consumed all the data yet? If so, mark buffer empty */
+ if (mymain->rowgroup_ctr >= rowgroups_avail) {
+ mymain->buffer_full = FALSE;
+ mymain->rowgroup_ctr = 0;
+ }
}
@@ -383,67 +383,67 @@ process_data_simple_main (j_decompress_ptr cinfo,
METHODDEF(void)
process_data_context_main (j_decompress_ptr cinfo,
- JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
- JDIMENSION out_rows_avail)
+ JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+ JDIMENSION out_rows_avail)
{
- my_main_ptr mymain = (my_main_ptr) cinfo->main;
-
- /* Read input data if we haven't filled the main buffer yet */
- if (! mymain->buffer_full) {
- if (! (*cinfo->coef->decompress_data) (cinfo,
- mymain->xbuffer[mymain->whichptr]))
- return; /* suspension forced, can do nothing more */
- mymain->buffer_full = TRUE; /* OK, we have an iMCU row to work with */
- mymain->iMCU_row_ctr++; /* count rows received */
- }
-
- /* Postprocessor typically will not swallow all the input data it is handed
- * in one call (due to filling the output buffer first). Must be prepared
- * to exit and restart. This switch lets us keep track of how far we got.
- * Note that each case falls through to the next on successful completion.
- */
- switch (mymain->context_state) {
- case CTX_POSTPONED_ROW:
- /* Call postprocessor using previously set pointers for postponed row */
- (*cinfo->post->post_process_data) (cinfo, mymain->xbuffer[mymain->whichptr],
+ my_main_ptr mymain = (my_main_ptr) cinfo->main;
+
+ /* Read input data if we haven't filled the main buffer yet */
+ if (! mymain->buffer_full) {
+ if (! (*cinfo->coef->decompress_data) (cinfo,
+ mymain->xbuffer[mymain->whichptr]))
+ return; /* suspension forced, can do nothing more */
+ mymain->buffer_full = TRUE; /* OK, we have an iMCU row to work with */
+ mymain->iMCU_row_ctr++; /* count rows received */
+ }
+
+ /* Postprocessor typically will not swallow all the input data it is handed
+ * in one call (due to filling the output buffer first). Must be prepared
+ * to exit and restart. This switch lets us keep track of how far we got.
+ * Note that each case falls through to the next on successful completion.
+ */
+ switch (mymain->context_state) {
+ case CTX_POSTPONED_ROW:
+ /* Call postprocessor using previously set pointers for postponed row */
+ (*cinfo->post->post_process_data) (cinfo, mymain->xbuffer[mymain->whichptr],
&mymain->rowgroup_ctr, mymain->rowgroups_avail,
output_buf, out_row_ctr, out_rows_avail);
- if (mymain->rowgroup_ctr < mymain->rowgroups_avail)
- return; /* Need to suspend */
- mymain->context_state = CTX_PREPARE_FOR_IMCU;
- if (*out_row_ctr >= out_rows_avail)
- return; /* Postprocessor exactly filled output buf */
- /*FALLTHROUGH*/
- case CTX_PREPARE_FOR_IMCU:
- /* Prepare to process first M-1 row groups of this iMCU row */
- mymain->rowgroup_ctr = 0;
- mymain->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_v_scaled_size - 1);
- /* Check for bottom of image: if so, tweak pointers to "duplicate"
- * the last sample row, and adjust rowgroups_avail to ignore padding rows.
- */
- if (mymain->iMCU_row_ctr == cinfo->total_iMCU_rows)
- set_bottom_pointers(cinfo);
- mymain->context_state = CTX_PROCESS_IMCU;
- /*FALLTHROUGH*/
- case CTX_PROCESS_IMCU:
- /* Call postprocessor using previously set pointers */
- (*cinfo->post->post_process_data) (cinfo, mymain->xbuffer[mymain->whichptr],
+ if (mymain->rowgroup_ctr < mymain->rowgroups_avail)
+ return; /* Need to suspend */
+ mymain->context_state = CTX_PREPARE_FOR_IMCU;
+ if (*out_row_ctr >= out_rows_avail)
+ return; /* Postprocessor exactly filled output buf */
+ /*FALLTHROUGH*/
+ case CTX_PREPARE_FOR_IMCU:
+ /* Prepare to process first M-1 row groups of this iMCU row */
+ mymain->rowgroup_ctr = 0;
+ mymain->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_v_scaled_size - 1);
+ /* Check for bottom of image: if so, tweak pointers to "duplicate"
+ * the last sample row, and adjust rowgroups_avail to ignore padding rows.
+ */
+ if (mymain->iMCU_row_ctr == cinfo->total_iMCU_rows)
+ set_bottom_pointers(cinfo);
+ mymain->context_state = CTX_PROCESS_IMCU;
+ /*FALLTHROUGH*/
+ case CTX_PROCESS_IMCU:
+ /* Call postprocessor using previously set pointers */
+ (*cinfo->post->post_process_data) (cinfo, mymain->xbuffer[mymain->whichptr],
&mymain->rowgroup_ctr, mymain->rowgroups_avail,
output_buf, out_row_ctr, out_rows_avail);
- if (mymain->rowgroup_ctr < mymain->rowgroups_avail)
- return; /* Need to suspend */
- /* After the first iMCU, change wraparound pointers to normal state */
- if (mymain->iMCU_row_ctr == 1)
- set_wraparound_pointers(cinfo);
- /* Prepare to load new iMCU row using other xbuffer list */
- mymain->whichptr ^= 1; /* 0=>1 or 1=>0 */
- mymain->buffer_full = FALSE;
- /* Still need to process last row group of this iMCU row, */
- /* which is saved at index M+1 of the other xbuffer */
- mymain->rowgroup_ctr = (JDIMENSION) (cinfo->min_DCT_v_scaled_size + 1);
- mymain->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_v_scaled_size + 2);
- mymain->context_state = CTX_POSTPONED_ROW;
- }
+ if (mymain->rowgroup_ctr < mymain->rowgroups_avail)
+ return; /* Need to suspend */
+ /* After the first iMCU, change wraparound pointers to normal state */
+ if (mymain->iMCU_row_ctr == 1)
+ set_wraparound_pointers(cinfo);
+ /* Prepare to load new iMCU row using other xbuffer list */
+ mymain->whichptr ^= 1; /* 0=>1 or 1=>0 */
+ mymain->buffer_full = FALSE;
+ /* Still need to process last row group of this iMCU row, */
+ /* which is saved at index M+1 of the other xbuffer */
+ mymain->rowgroup_ctr = (JDIMENSION) (cinfo->min_DCT_v_scaled_size + 1);
+ mymain->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_v_scaled_size + 2);
+ mymain->context_state = CTX_POSTPONED_ROW;
+ }
}
@@ -457,12 +457,12 @@ process_data_context_main (j_decompress_ptr cinfo,
METHODDEF(void)
process_data_crank_post (j_decompress_ptr cinfo,
- JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
- JDIMENSION out_rows_avail)
+ JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
+ JDIMENSION out_rows_avail)
{
- (*cinfo->post->post_process_data) (cinfo, (JSAMPIMAGE) NULL,
- (JDIMENSION *) NULL, (JDIMENSION) 0,
- output_buf, out_row_ctr, out_rows_avail);
+ (*cinfo->post->post_process_data) (cinfo, (JSAMPIMAGE) NULL,
+ (JDIMENSION *) NULL, (JDIMENSION) 0,
+ output_buf, out_row_ctr, out_rows_avail);
}
#endif /* QUANT_2PASS_SUPPORTED */
@@ -475,38 +475,38 @@ process_data_crank_post (j_decompress_ptr cinfo,
GLOBAL(void)
jinit_d_main_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
{
- my_main_ptr mymain;
- int ci, rgroup, ngroups;
- jpeg_component_info *compptr;
+ my_main_ptr mymain;
+ int ci, rgroup, ngroups;
+ jpeg_component_info *compptr;
- mymain = (my_main_ptr)
- (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
+ mymain = (my_main_ptr)
+ (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
SIZEOF(my_main_controller));
- cinfo->main = (struct jpeg_d_main_controller *) mymain;
- mymain->pub.start_pass = start_pass_main;
-
- if (need_full_buffer) /* shouldn't happen */
- ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
-
- /* Allocate the workspace.
- * ngroups is the number of row groups we need.
- */
- if (cinfo->upsample->need_context_rows) {
- if (cinfo->min_DCT_v_scaled_size < 2) /* unsupported, see comments above */
- ERREXIT(cinfo, JERR_NOTIMPL);
- alloc_funny_pointers(cinfo); /* Alloc space for xbuffer[] lists */
- ngroups = cinfo->min_DCT_v_scaled_size + 2;
- } else {
- ngroups = cinfo->min_DCT_v_scaled_size;
- }
-
- for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
- ci++, compptr++) {
- rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
- cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
- mymain->buffer[ci] = (*cinfo->mem->alloc_sarray)
+ cinfo->main = (struct jpeg_d_main_controller *) mymain;
+ mymain->pub.start_pass = start_pass_main;
+
+ if (need_full_buffer) /* shouldn't happen */
+ ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
+
+ /* Allocate the workspace.
+ * ngroups is the number of row groups we need.
+ */
+ if (cinfo->upsample->need_context_rows) {
+ if (cinfo->min_DCT_v_scaled_size < 2) /* unsupported, see comments above */
+ ERREXIT(cinfo, JERR_NOTIMPL);
+ alloc_funny_pointers(cinfo); /* Alloc space for xbuffer[] lists */
+ ngroups = cinfo->min_DCT_v_scaled_size + 2;
+ } else {
+ ngroups = cinfo->min_DCT_v_scaled_size;
+ }
+
+ for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
+ ci++, compptr++) {
+ rgroup = (compptr->v_samp_factor * compptr->DCT_v_scaled_size) /
+ cinfo->min_DCT_v_scaled_size; /* height of a row group of component */
+ mymain->buffer[ci] = (*cinfo->mem->alloc_sarray)
((j_common_ptr) cinfo, JPOOL_IMAGE,
- compptr->width_in_blocks * compptr->DCT_h_scaled_size,
- (JDIMENSION) (rgroup * ngroups));
- }
+ compptr->width_in_blocks * compptr->DCT_h_scaled_size,
+ (JDIMENSION) (rgroup * ngroups));
+ }
}