diff options
author | Naushir Patuck <naush@raspberrypi.com> | 2023-05-03 13:20:27 +0100 |
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committer | Laurent Pinchart <laurent.pinchart@ideasonboard.com> | 2023-05-04 20:47:40 +0300 |
commit | 726e9274ea95fa46352556d340c5793a8da51fcd (patch) | |
tree | 80f6adcdbf744f9317e09eff3e80c602b384a753 /src/ipa/rpi/cam_helper/md_parser_smia.cpp | |
parent | 46aefed208fef4bc8d6f6e8882b92b9af710a60b (diff) |
pipeline: ipa: raspberrypi: Refactor and move the Raspberry Pi code
Split the Raspberry Pi pipeline handler and IPA source code into common
and VC4/BCM2835 specific file structures.
For the pipeline handler, the common code files now live in
src/libcamera/pipeline/rpi/common/
and the VC4-specific files in src/libcamera/pipeline/rpi/vc4/.
For the IPA, the common code files now live in
src/ipa/rpi/{cam_helper,controller}/
and the vc4 specific files in src/ipa/rpi/vc4/. With this change, the
camera tuning files are now installed under share/libcamera/ipa/rpi/vc4/.
To build the pipeline and IPA, the meson configuration options have now
changed from "raspberrypi" to "rpi/vc4":
meson setup build -Dipas=rpi/vc4 -Dpipelines=rpi/vc4
Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Diffstat (limited to 'src/ipa/rpi/cam_helper/md_parser_smia.cpp')
-rw-r--r-- | src/ipa/rpi/cam_helper/md_parser_smia.cpp | 149 |
1 files changed, 149 insertions, 0 deletions
diff --git a/src/ipa/rpi/cam_helper/md_parser_smia.cpp b/src/ipa/rpi/cam_helper/md_parser_smia.cpp new file mode 100644 index 00000000..210787ed --- /dev/null +++ b/src/ipa/rpi/cam_helper/md_parser_smia.cpp @@ -0,0 +1,149 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ +/* + * Copyright (C) 2019-2021, Raspberry Pi Ltd + * + * md_parser_smia.cpp - SMIA specification based embedded data parser + */ + +#include <libcamera/base/log.h> +#include "md_parser.h" + +using namespace RPiController; +using namespace libcamera; + +/* + * 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. + */ + +constexpr unsigned int LineStart = 0x0a; +constexpr unsigned int LineEndTag = 0x07; +constexpr unsigned int RegHiBits = 0xaa; +constexpr unsigned int RegLowBits = 0xa5; +constexpr unsigned int RegValue = 0x5a; +constexpr unsigned int RegSkip = 0x55; + +MdParserSmia::MdParserSmia(std::initializer_list<uint32_t> registerList) +{ + for (auto r : registerList) + offsets_[r] = {}; +} + +MdParser::Status MdParserSmia::parse(libcamera::Span<const uint8_t> buffer, + RegisterMap ®isters) +{ + if (reset_) { + /* + * Search again through the metadata for all the registers + * requested. + */ + ASSERT(bitsPerPixel_); + + for (const auto &kv : offsets_) + offsets_[kv.first] = {}; + + ParseStatus ret = findRegs(buffer); + /* + * > 0 means "worked partially but parse again next time", + * < 0 means "hard error". + * + * In either case, we retry parsing on the next frame. + */ + if (ret != ParseOk) + return ERROR; + + reset_ = false; + } + + /* Populate the register values requested. */ + registers.clear(); + for (const auto &[reg, offset] : offsets_) { + if (!offset) { + reset_ = true; + return NOTFOUND; + } + registers[reg] = buffer[offset.value()]; + } + + return OK; +} + +MdParserSmia::ParseStatus MdParserSmia::findRegs(libcamera::Span<const uint8_t> buffer) +{ + ASSERT(offsets_.size()); + + if (buffer[0] != LineStart) + return NoLineStart; + + unsigned int currentOffset = 1; /* after the LineStart */ + unsigned int currentLineStart = 0, currentLine = 0; + unsigned int regNum = 0, regsDone = 0; + + while (1) { + int tag = buffer[currentOffset++]; + + if ((bitsPerPixel_ == 10 && + (currentOffset + 1 - currentLineStart) % 5 == 0) || + (bitsPerPixel_ == 12 && + (currentOffset + 1 - currentLineStart) % 3 == 0)) { + if (buffer[currentOffset++] != RegSkip) + return BadDummy; + } + + int dataByte = buffer[currentOffset++]; + + if (tag == LineEndTag) { + if (dataByte != LineEndTag) + return BadLineEnd; + + if (numLines_ && ++currentLine == numLines_) + return MissingRegs; + + if (lineLengthBytes_) { + currentOffset = currentLineStart + lineLengthBytes_; + + /* Require whole line to be in the buffer (if buffer size set). */ + if (buffer.size() && + currentOffset + lineLengthBytes_ > buffer.size()) + return MissingRegs; + + if (buffer[currentOffset] != LineStart) + return NoLineStart; + } else { + /* allow a zero line length to mean "hunt for the next line" */ + while (currentOffset < buffer.size() && + buffer[currentOffset] != LineStart) + currentOffset++; + + if (currentOffset == buffer.size()) + return NoLineStart; + } + + /* inc currentOffset to after LineStart */ + currentLineStart = currentOffset++; + } else { + if (tag == RegHiBits) + regNum = (regNum & 0xff) | (dataByte << 8); + else if (tag == RegLowBits) + regNum = (regNum & 0xff00) | dataByte; + else if (tag == RegSkip) + regNum++; + else if (tag == RegValue) { + auto reg = offsets_.find(regNum); + + if (reg != offsets_.end()) { + offsets_[regNum] = currentOffset - 1; + + if (++regsDone == offsets_.size()) + return ParseOk; + } + regNum++; + } else + return IllegalTag; + } + } +} |