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-rw-r--r--src/ipa/raspberrypi/md_parser_smia.cpp70
1 files changed, 37 insertions, 33 deletions
diff --git a/src/ipa/raspberrypi/md_parser_smia.cpp b/src/ipa/raspberrypi/md_parser_smia.cpp
index 852a1d34..5c413f1b 100644
--- a/src/ipa/raspberrypi/md_parser_smia.cpp
+++ b/src/ipa/raspberrypi/md_parser_smia.cpp
@@ -1,31 +1,30 @@
/* SPDX-License-Identifier: BSD-2-Clause */
/*
- * Copyright (C) 2019, Raspberry Pi (Trading) Limited
+ * Copyright (C) 2019-2021, Raspberry Pi (Trading) Limited
*
- * md_parser.cpp - image sensor metadata parsers
+ * md_parser_smia.cpp - SMIA specification based embedded data parser
*/
-
#include <assert.h>
-#include <map>
-#include <string.h>
#include "md_parser.hpp"
using namespace RPiController;
-// This function goes through the embedded data to find the offsets (not
-// values!), in the data block, where the values of the given registers can
-// subsequently be found.
-
-// Embedded data tag bytes, from Sony IMX219 datasheet but general to all SMIA
-// sensors, I think.
+/*
+ * This function goes through the embedded data to find the offsets (not
+ * values!), in the data block, where the values of the given registers can
+ * subsequently be found.
+ *
+ * Embedded data tag bytes, from Sony IMX219 datasheet but general to all SMIA
+ * sensors, I think.
+ */
-#define LINE_START 0x0a
-#define LINE_END_TAG 0x07
-#define REG_HI_BITS 0xaa
-#define REG_LOW_BITS 0xa5
-#define REG_VALUE 0x5a
-#define REG_SKIP 0x55
+constexpr unsigned int LINE_START = 0x0a;
+constexpr unsigned int LINE_END_TAG = 0x07;
+constexpr unsigned int REG_HI_BITS = 0xaa;
+constexpr unsigned int REG_LOW_BITS = 0xa5;
+constexpr unsigned int REG_VALUE = 0x5a;
+constexpr unsigned int REG_SKIP = 0x55;
MdParserSmia::ParseStatus MdParserSmia::findRegs(libcamera::Span<const uint8_t> buffer,
uint32_t regs[], int offsets[],
@@ -36,12 +35,13 @@ MdParserSmia::ParseStatus MdParserSmia::findRegs(libcamera::Span<const uint8_t>
if (buffer[0] != LINE_START)
return NO_LINE_START;
- unsigned int current_offset = 1; // after the LINE_START
+ unsigned int current_offset = 1; /* after the LINE_START */
unsigned int current_line_start = 0, current_line = 0;
unsigned int reg_num = 0, first_reg = 0;
- ParseStatus retcode = PARSE_OK;
+
while (1) {
int tag = buffer[current_offset++];
+
if ((bits_per_pixel_ == 10 &&
(current_offset + 1 - current_line_start) % 5 == 0) ||
(bits_per_pixel_ == 12 &&
@@ -49,34 +49,38 @@ MdParserSmia::ParseStatus MdParserSmia::findRegs(libcamera::Span<const uint8_t>
if (buffer[current_offset++] != REG_SKIP)
return BAD_DUMMY;
}
+
int data_byte = buffer[current_offset++];
- //printf("Offset %u, tag 0x%02x data_byte 0x%02x\n", current_offset-1, tag, data_byte);
+
if (tag == LINE_END_TAG) {
if (data_byte != LINE_END_TAG)
return BAD_LINE_END;
+
if (num_lines_ && ++current_line == num_lines_)
return MISSING_REGS;
+
if (line_length_bytes_) {
- current_offset =
- current_line_start + line_length_bytes_;
- // Require whole line to be in the buffer (if buffer size set).
+ current_offset = current_line_start + line_length_bytes_;
+
+ /* Require whole line to be in the buffer (if buffer size set). */
if (buffer.size() &&
- current_offset + line_length_bytes_ >
- buffer.size())
+ current_offset + line_length_bytes_ > buffer.size())
return MISSING_REGS;
+
if (buffer[current_offset] != LINE_START)
return NO_LINE_START;
} else {
- // allow a zero line length to mean "hunt for the next line"
+ /* allow a zero line length to mean "hunt for the next line" */
while (buffer[current_offset] != LINE_START &&
current_offset < buffer.size())
current_offset++;
+
if (current_offset == buffer.size())
return NO_LINE_START;
}
- // inc current_offset to after LINE_START
- current_line_start =
- current_offset++;
+
+ /* inc current_offset to after LINE_START */
+ current_line_start = current_offset++;
} else {
if (tag == REG_HI_BITS)
reg_num = (reg_num & 0xff) | (data_byte << 8);
@@ -86,13 +90,13 @@ MdParserSmia::ParseStatus MdParserSmia::findRegs(libcamera::Span<const uint8_t>
reg_num++;
else if (tag == REG_VALUE) {
while (reg_num >=
- // assumes registers are in order...
+ /* assumes registers are in order... */
regs[first_reg]) {
if (reg_num == regs[first_reg])
- offsets[first_reg] =
- current_offset - 1;
+ offsets[first_reg] = current_offset - 1;
+
if (++first_reg == num_regs)
- return retcode;
+ return PARSE_OK;
}
reg_num++;
} else