Index: jdinput.c |
diff --git a/jdinput.c b/jdinput.c |
index e7ba33f7b5ffd3dc3fa00bb3ec19b6be649fd4cc..32a6b424e2dd4443513a5c2de209b6a2581d08a2 100644 |
--- a/jdinput.c |
+++ b/jdinput.c |
@@ -4,8 +4,10 @@ |
* This file was part of the Independent JPEG Group's software: |
* Copyright (C) 1991-1997, Thomas G. Lane. |
* libjpeg-turbo Modifications: |
- * Copyright (C) 2010, D. R. Commander. |
- * For conditions of distribution and use, see the accompanying README file. |
+ * Copyright (C) 2010, 2016, D. R. Commander. |
+ * Copyright (C) 2015, Google, Inc. |
+ * For conditions of distribution and use, see the accompanying README.ijg |
+ * file. |
* |
* This file contains input control logic for the JPEG decompressor. |
* These routines are concerned with controlling the decompressor's input |
@@ -24,14 +26,14 @@ |
typedef struct { |
struct jpeg_input_controller pub; /* public fields */ |
- boolean inheaders; /* TRUE until first SOS is reached */ |
+ boolean inheaders; /* TRUE until first SOS is reached */ |
} my_input_controller; |
-typedef my_input_controller * my_inputctl_ptr; |
+typedef my_input_controller *my_inputctl_ptr; |
/* Forward declarations */ |
-METHODDEF(int) consume_markers JPP((j_decompress_ptr cinfo)); |
+METHODDEF(int) consume_markers (j_decompress_ptr cinfo); |
/* |
@@ -57,7 +59,7 @@ initial_setup (j_decompress_ptr cinfo) |
/* Check that number of components won't exceed internal array sizes */ |
if (cinfo->num_components > MAX_COMPONENTS) |
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components, |
- MAX_COMPONENTS); |
+ MAX_COMPONENTS); |
/* Compute maximum sampling factors; check factor validity */ |
cinfo->max_h_samp_factor = 1; |
@@ -65,12 +67,12 @@ initial_setup (j_decompress_ptr cinfo) |
for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components; |
ci++, compptr++) { |
if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR || |
- compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR) |
+ compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR) |
ERREXIT(cinfo, JERR_BAD_SAMPLING); |
cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor, |
- compptr->h_samp_factor); |
+ compptr->h_samp_factor); |
cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor, |
- compptr->v_samp_factor); |
+ compptr->v_samp_factor); |
} |
#if JPEG_LIB_VERSION >=80 |
@@ -100,10 +102,15 @@ initial_setup (j_decompress_ptr cinfo) |
/* Size in DCT blocks */ |
compptr->width_in_blocks = (JDIMENSION) |
jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, |
- (long) (cinfo->max_h_samp_factor * DCTSIZE)); |
+ (long) (cinfo->max_h_samp_factor * DCTSIZE)); |
compptr->height_in_blocks = (JDIMENSION) |
jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, |
- (long) (cinfo->max_v_samp_factor * DCTSIZE)); |
+ (long) (cinfo->max_v_samp_factor * DCTSIZE)); |
+ /* Set the first and last MCU columns to decompress from multi-scan images. |
+ * By default, decompress all of the MCU columns. |
+ */ |
+ cinfo->master->first_MCU_col[ci] = 0; |
+ cinfo->master->last_MCU_col[ci] = compptr->width_in_blocks - 1; |
/* downsampled_width and downsampled_height will also be overridden by |
* jdmaster.c if we are doing full decompression. The transcoder library |
* doesn't use these values, but the calling application might. |
@@ -111,10 +118,10 @@ initial_setup (j_decompress_ptr cinfo) |
/* Size in samples */ |
compptr->downsampled_width = (JDIMENSION) |
jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor, |
- (long) cinfo->max_h_samp_factor); |
+ (long) cinfo->max_h_samp_factor); |
compptr->downsampled_height = (JDIMENSION) |
jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor, |
- (long) cinfo->max_v_samp_factor); |
+ (long) cinfo->max_v_samp_factor); |
/* Mark component needed, until color conversion says otherwise */ |
compptr->component_needed = TRUE; |
/* Mark no quantization table yet saved for component */ |
@@ -124,7 +131,7 @@ initial_setup (j_decompress_ptr cinfo) |
/* Compute number of fully interleaved MCU rows. */ |
cinfo->total_iMCU_rows = (JDIMENSION) |
jdiv_round_up((long) cinfo->image_height, |
- (long) (cinfo->max_v_samp_factor*DCTSIZE)); |
+ (long) (cinfo->max_v_samp_factor*DCTSIZE)); |
/* Decide whether file contains multiple scans */ |
if (cinfo->comps_in_scan < cinfo->num_components || cinfo->progressive_mode) |
@@ -141,16 +148,16 @@ per_scan_setup (j_decompress_ptr cinfo) |
{ |
int ci, mcublks, tmp; |
jpeg_component_info *compptr; |
- |
+ |
if (cinfo->comps_in_scan == 1) { |
- |
+ |
/* Noninterleaved (single-component) scan */ |
compptr = cinfo->cur_comp_info[0]; |
- |
+ |
/* Overall image size in MCUs */ |
cinfo->MCUs_per_row = compptr->width_in_blocks; |
cinfo->MCU_rows_in_scan = compptr->height_in_blocks; |
- |
+ |
/* For noninterleaved scan, always one block per MCU */ |
compptr->MCU_width = 1; |
compptr->MCU_height = 1; |
@@ -163,28 +170,28 @@ per_scan_setup (j_decompress_ptr cinfo) |
tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor); |
if (tmp == 0) tmp = compptr->v_samp_factor; |
compptr->last_row_height = tmp; |
- |
+ |
/* Prepare array describing MCU composition */ |
cinfo->blocks_in_MCU = 1; |
cinfo->MCU_membership[0] = 0; |
- |
+ |
} else { |
- |
+ |
/* Interleaved (multi-component) scan */ |
if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN) |
ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan, |
- MAX_COMPS_IN_SCAN); |
- |
+ MAX_COMPS_IN_SCAN); |
+ |
/* Overall image size in MCUs */ |
cinfo->MCUs_per_row = (JDIMENSION) |
jdiv_round_up((long) cinfo->image_width, |
- (long) (cinfo->max_h_samp_factor*DCTSIZE)); |
+ (long) (cinfo->max_h_samp_factor*DCTSIZE)); |
cinfo->MCU_rows_in_scan = (JDIMENSION) |
jdiv_round_up((long) cinfo->image_height, |
- (long) (cinfo->max_v_samp_factor*DCTSIZE)); |
- |
+ (long) (cinfo->max_v_samp_factor*DCTSIZE)); |
+ |
cinfo->blocks_in_MCU = 0; |
- |
+ |
for (ci = 0; ci < cinfo->comps_in_scan; ci++) { |
compptr = cinfo->cur_comp_info[ci]; |
/* Sampling factors give # of blocks of component in each MCU */ |
@@ -202,12 +209,12 @@ per_scan_setup (j_decompress_ptr cinfo) |
/* Prepare array describing MCU composition */ |
mcublks = compptr->MCU_blocks; |
if (cinfo->blocks_in_MCU + mcublks > D_MAX_BLOCKS_IN_MCU) |
- ERREXIT(cinfo, JERR_BAD_MCU_SIZE); |
+ ERREXIT(cinfo, JERR_BAD_MCU_SIZE); |
while (mcublks-- > 0) { |
- cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci; |
+ cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci; |
} |
} |
- |
+ |
} |
} |
@@ -238,7 +245,7 @@ latch_quant_tables (j_decompress_ptr cinfo) |
{ |
int ci, qtblno; |
jpeg_component_info *compptr; |
- JQUANT_TBL * qtbl; |
+ JQUANT_TBL *qtbl; |
for (ci = 0; ci < cinfo->comps_in_scan; ci++) { |
compptr = cinfo->cur_comp_info[ci]; |
@@ -248,13 +255,13 @@ latch_quant_tables (j_decompress_ptr cinfo) |
/* Make sure specified quantization table is present */ |
qtblno = compptr->quant_tbl_no; |
if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS || |
- cinfo->quant_tbl_ptrs[qtblno] == NULL) |
+ cinfo->quant_tbl_ptrs[qtblno] == NULL) |
ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno); |
/* OK, save away the quantization table */ |
qtbl = (JQUANT_TBL *) |
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE, |
- SIZEOF(JQUANT_TBL)); |
- MEMCOPY(qtbl, cinfo->quant_tbl_ptrs[qtblno], SIZEOF(JQUANT_TBL)); |
+ sizeof(JQUANT_TBL)); |
+ MEMCOPY(qtbl, cinfo->quant_tbl_ptrs[qtblno], sizeof(JQUANT_TBL)); |
compptr->quant_table = qtbl; |
} |
} |
@@ -313,31 +320,31 @@ consume_markers (j_decompress_ptr cinfo) |
val = (*cinfo->marker->read_markers) (cinfo); |
switch (val) { |
- case JPEG_REACHED_SOS: /* Found SOS */ |
- if (inputctl->inheaders) { /* 1st SOS */ |
+ case JPEG_REACHED_SOS: /* Found SOS */ |
+ if (inputctl->inheaders) { /* 1st SOS */ |
initial_setup(cinfo); |
inputctl->inheaders = FALSE; |
/* Note: start_input_pass must be called by jdmaster.c |
* before any more input can be consumed. jdapimin.c is |
* responsible for enforcing this sequencing. |
*/ |
- } else { /* 2nd or later SOS marker */ |
+ } else { /* 2nd or later SOS marker */ |
if (! inputctl->pub.has_multiple_scans) |
- ERREXIT(cinfo, JERR_EOI_EXPECTED); /* Oops, I wasn't expecting this! */ |
+ ERREXIT(cinfo, JERR_EOI_EXPECTED); /* Oops, I wasn't expecting this! */ |
start_input_pass(cinfo); |
} |
break; |
- case JPEG_REACHED_EOI: /* Found EOI */ |
+ case JPEG_REACHED_EOI: /* Found EOI */ |
inputctl->pub.eoi_reached = TRUE; |
- if (inputctl->inheaders) { /* Tables-only datastream, apparently */ |
+ if (inputctl->inheaders) { /* Tables-only datastream, apparently */ |
if (cinfo->marker->saw_SOF) |
- ERREXIT(cinfo, JERR_SOF_NO_SOS); |
+ ERREXIT(cinfo, JERR_SOF_NO_SOS); |
} else { |
/* Prevent infinite loop in coef ctlr's decompress_data routine |
* if user set output_scan_number larger than number of scans. |
*/ |
if (cinfo->output_scan_number > cinfo->input_scan_number) |
- cinfo->output_scan_number = cinfo->input_scan_number; |
+ cinfo->output_scan_number = cinfo->input_scan_number; |
} |
break; |
case JPEG_SUSPENDED: |
@@ -382,7 +389,7 @@ jinit_input_controller (j_decompress_ptr cinfo) |
/* Create subobject in permanent pool */ |
inputctl = (my_inputctl_ptr) |
(*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT, |
- SIZEOF(my_input_controller)); |
+ sizeof(my_input_controller)); |
cinfo->inputctl = (struct jpeg_input_controller *) inputctl; |
/* Initialize method pointers */ |
inputctl->pub.consume_input = consume_markers; |