libcamera/jmondi/libcamera.git - Jacopo Mondi's clone of libcamera

diff options

author	Laurent Pinchart <laurent.pinchart@ideasonboard.com>	2023-07-06 10:26:51 +0300
committer	Laurent Pinchart <laurent.pinchart@ideasonboard.com>	2023-07-07 11:39:32 +0300
commit	d314d3b98b86dec9a25ce7b829e72a790b7ead1b (patch)
tree	c18d50782cc9abb2ecf630a693795bdc957132c2 /src/android/camera_device.h
parent	ca437b4a0cde5ec72a5eea709eb044264deb4f55 (diff)

libcamera: Add option to configure udev support

libcamera uses udev to support hotplug (and unplug) detection. This is an optional feature, which gets selected automatically if udev is available. Users may however want to build libcamera without hotplug detection, even if udev is available on the system. Add a new feature option to control udev support. The default value is auto, which retains the existing behaviour. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Umang Jain <umang.jain@ideasonboard.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

Diffstat (limited to 'src/android/camera_device.h')

0 files changed, 0 insertions, 0 deletions

/* SPDX-License-Identifier: LGPL-2.1-or-later */ /* * Copyright (C) 2020, Google Inc. * * encoder_libjpeg.cpp - JPEG encoding using libjpeg native API */ #include "encoder_libjpeg.h" #include <fcntl.h> #include <iomanip> #include <iostream> #include <sstream> #include <string.h> #include <sys/mman.h> #include <unistd.h> #include <vector> #include <libcamera/base/log.h> #include <libcamera/camera.h> #include <libcamera/formats.h> #include <libcamera/pixel_format.h> #include "libcamera/internal/formats.h" #include "libcamera/internal/mapped_framebuffer.h" using namespace libcamera; LOG_DECLARE_CATEGORY(JPEG) namespace { struct JPEGPixelFormatInfo { J_COLOR_SPACE colorSpace; const PixelFormatInfo &pixelFormatInfo; bool nvSwap; }; const std::map<PixelFormat, JPEGPixelFormatInfo> pixelInfo{ { formats::R8, { JCS_GRAYSCALE, PixelFormatInfo::info(formats::R8), false } }, { formats::RGB888, { JCS_EXT_BGR, PixelFormatInfo::info(formats::RGB888), false } }, { formats::BGR888, { JCS_EXT_RGB, PixelFormatInfo::info(formats::BGR888), false } }, { formats::NV12, { JCS_YCbCr, PixelFormatInfo::info(formats::NV12), false } }, { formats::NV21, { JCS_YCbCr, PixelFormatInfo::info(formats::NV21), true } }, { formats::NV16, { JCS_YCbCr, PixelFormatInfo::info(formats::NV16), false } }, { formats::NV61, { JCS_YCbCr, PixelFormatInfo::info(formats::NV61), true } }, { formats::NV24, { JCS_YCbCr, PixelFormatInfo::info(formats::NV24), false } }, { formats::NV42, { JCS_YCbCr, PixelFormatInfo::info(formats::NV42), true } }, }; const struct JPEGPixelFormatInfo &findPixelInfo(const PixelFormat &format) { static const struct JPEGPixelFormatInfo invalidPixelFormat { JCS_UNKNOWN, PixelFormatInfo(), false }; const auto iter = pixelInfo.find(format); if (iter == pixelInfo.end()) { LOG(JPEG, Error) << "Unsupported pixel format for JPEG encoder: " << format.toString(); return invalidPixelFormat; } return iter->second; } } /* namespace */ EncoderLibJpeg::EncoderLibJpeg() { /* \todo Expand error handling coverage with a custom handler. */ compress_.err = jpeg_std_error(&jerr_); jpeg_create_compress(&compress_); } EncoderLibJpeg::~EncoderLibJpeg() { jpeg_destroy_compress(&compress_); } int EncoderLibJpeg::configure(const StreamConfiguration &cfg) { const struct JPEGPixelFormatInfo info = findPixelInfo(cfg.pixelFormat); if (info.colorSpace == JCS_UNKNOWN) return -ENOTSUP; compress_.image_width = cfg.size.width; compress_.image_height = cfg.size.height; compress_.in_color_space = info.colorSpace; compress_.input_components = info.colorSpace == JCS_GRAYSCALE ? 1 : 3; jpeg_set_defaults(&compress_); pixelFormatInfo_ = &info.pixelFormatInfo; nv_ = pixelFormatInfo_->numPlanes() == 2; nvSwap_ = info.nvSwap; return 0; } void EncoderLibJpeg::compressRGB(Span<const uint8_t> frame) { unsigned char *src = const_cast<unsigned char *>(frame.data()); /* \todo Stride information should come from buffer configuration. */ unsigned int stride = pixelFormatInfo_->stride(compress_.image_width, 0); JSAMPROW row_pointer[1]; while (compress_.next_scanline < compress_.image_height) { row_pointer[0] = &src[compress_.next_scanline * stride]; jpeg_write_scanlines(&compress_, row_pointer, 1); } } /* * Compress the incoming buffer from a supported NV format. * This naively unpacks the semi-planar NV12 to a YUV888 format for libjpeg. */ void EncoderLibJpeg::compressNV(Span<const uint8_t> frame) { uint8_t tmprowbuf[compress_.image_width * 3]; /* * \todo Use the raw api, and only unpack the cb/cr samples to new line * buffers. If possible, see if we can set appropriate pixel strides * too to save even that copy. * * Possible hints at: * https://sourceforge.net/p/libjpeg/mailman/message/30815123/ */ unsigned int y_stride = pixelFormatInfo_->stride(compress_.image_width, 0); unsigned int c_stride = pixelFormatInfo_->stride(compress_.image_width, 1); unsigned int horzSubSample = 2 * compress_.image_width / c_stride; unsigned int vertSubSample = pixelFormatInfo_->planes[1].verticalSubSampling; unsigned int c_inc = horzSubSample == 1 ? 2 : 0; unsigned int cb_pos = nvSwap_ ? 1 : 0; unsigned int cr_pos = nvSwap_ ? 0 : 1; const unsigned char *src = frame.data(); const unsigned char *src_c = src + y_stride * compress_.image_height; JSAMPROW row_pointer[1]; row_pointer[0] = &tmprowbuf[0]; for (unsigned int y = 0; y < compress_.image_height; y++) { unsigned char *dst = &tmprowbuf[0]; const unsigned char *src_y = src + y * compress_.image_width; const unsigned char *src_cb = src_c + (y / vertSubSample) * c_stride + cb_pos; const unsigned char *src_cr = src_c + (y / vertSubSample) * c_stride + cr_pos; for (unsigned int x = 0; x < compress_.image_width; x += 2) { dst[0] = *src_y; dst[1] = *src_cb;


context:
space:
mode: