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-rw-r--r--src/android/meson.build1
-rw-r--r--src/android/yuv/post_processor_yuv.cpp142
-rw-r--r--src/android/yuv/post_processor_yuv.h42
3 files changed, 185 insertions, 0 deletions
diff --git a/src/android/meson.build b/src/android/meson.build
index f5567a1c..9719c42b 100644
--- a/src/android/meson.build
+++ b/src/android/meson.build
@@ -49,6 +49,7 @@ android_hal_sources = files([
'jpeg/exif.cpp',
'jpeg/post_processor_jpeg.cpp',
'jpeg/thumbnailer.cpp',
+ 'yuv/post_processor_yuv.cpp'
])
android_camera_metadata_sources = files([
diff --git a/src/android/yuv/post_processor_yuv.cpp b/src/android/yuv/post_processor_yuv.cpp
new file mode 100644
index 00000000..1318349a
--- /dev/null
+++ b/src/android/yuv/post_processor_yuv.cpp
@@ -0,0 +1,142 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Google Inc.
+ *
+ * post_processor_yuv.cpp - Post Processor using libyuv
+ */
+
+#include "post_processor_yuv.h"
+
+#include <libyuv/scale.h>
+
+#include <libcamera/formats.h>
+#include <libcamera/geometry.h>
+#include <libcamera/pixel_format.h>
+
+#include "libcamera/internal/formats.h"
+#include "libcamera/internal/log.h"
+
+using namespace libcamera;
+
+LOG_DEFINE_CATEGORY(YUV)
+
+int PostProcessorYuv::configure(const StreamConfiguration &inCfg,
+ const StreamConfiguration &outCfg)
+{
+ if (inCfg.pixelFormat != outCfg.pixelFormat) {
+ LOG(YUV, Error) << "Pixel format conversion is not supported"
+ << " (from " << inCfg.pixelFormat.toString()
+ << " to " << outCfg.pixelFormat.toString() << ")";
+ return -EINVAL;
+ }
+
+ if (inCfg.size < outCfg.size) {
+ LOG(YUV, Error) << "Up-scaling is not supported"
+ << " (from " << inCfg.size.toString()
+ << " to " << outCfg.size.toString() << ")";
+ return -EINVAL;
+ }
+
+ if (inCfg.pixelFormat != formats::NV12) {
+ LOG(YUV, Error) << "Unsupported format " << inCfg.pixelFormat
+ << " (only NV12 is supported)";
+ return -EINVAL;
+ }
+
+ calculateLengths(inCfg, outCfg);
+ return 0;
+}
+
+int PostProcessorYuv::process(const FrameBuffer &source,
+ libcamera::MappedBuffer *destination,
+ [[maybe_unused]] const CameraMetadata &requestMetadata,
+ [[maybe_unused]] CameraMetadata *metadata)
+{
+ if (!isValidBuffers(source, *destination))
+ return -EINVAL;
+
+ const MappedFrameBuffer sourceMapped(&source, PROT_READ);
+ if (!sourceMapped.isValid()) {
+ LOG(YUV, Error) << "Failed to mmap camera frame buffer";
+ return -EINVAL;
+ }
+
+ int ret = libyuv::NV12Scale(sourceMapped.maps()[0].data(),
+ sourceStride_[0],
+ sourceMapped.maps()[1].data(),
+ sourceStride_[1],
+ sourceSize_.width, sourceSize_.height,
+ destination->maps()[0].data(),
+ destinationStride_[0],
+ destination->maps()[1].data(),
+ destinationStride_[1],
+ destinationSize_.width,
+ destinationSize_.height,
+ libyuv::FilterMode::kFilterBilinear);
+ if (ret) {
+ LOG(YUV, Error) << "Failed NV12 scaling: " << ret;
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+bool PostProcessorYuv::isValidBuffers(const FrameBuffer &source,
+ const libcamera::MappedBuffer &destination) const
+{
+ if (source.planes().size() != 2) {
+ LOG(YUV, Error) << "Invalid number of source planes: "
+ << source.planes().size();
+ return false;
+ }
+ if (destination.maps().size() != 2) {
+ LOG(YUV, Error) << "Invalid number of destination planes: "
+ << destination.maps().size();
+ return false;
+ }
+
+ if (source.planes()[0].length < sourceLength_[0] ||
+ source.planes()[1].length < sourceLength_[1]) {
+ LOG(YUV, Error)
+ << "The source planes lengths are too small, actual size: {"
+ << source.planes()[0].length << ", "
+ << source.planes()[1].length
+ << "}, expected size: {"
+ << sourceLength_[0] << ", "
+ << sourceLength_[1] << "}";
+ return false;
+ }
+ if (destination.maps()[0].size() < destinationLength_[0] ||
+ destination.maps()[1].size() < destinationLength_[1]) {
+ LOG(YUV, Error)
+ << "The destination planes lengths are too small, actual size: {"
+ << destination.maps()[0].size() << ", "
+ << destination.maps()[1].size()
+ << "}, expected size: {"
+ << sourceLength_[0] << ", "
+ << sourceLength_[1] << "}";
+ return false;
+ }
+
+ return true;
+}
+
+void PostProcessorYuv::calculateLengths(const StreamConfiguration &inCfg,
+ const StreamConfiguration &outCfg)
+{
+ sourceSize_ = inCfg.size;
+ destinationSize_ = outCfg.size;
+
+ const PixelFormatInfo &nv12Info = PixelFormatInfo::info(formats::NV12);
+ for (unsigned int i = 0; i < 2; i++) {
+ sourceStride_[i] = inCfg.stride;
+ destinationStride_[i] = nv12Info.stride(destinationSize_.width, i, 1);
+
+ const unsigned int vertSubSample =
+ nv12Info.planes[i].verticalSubSampling;
+ sourceLength_[i] = sourceStride_[i] *
+ ((sourceSize_.height + vertSubSample - 1) / vertSubSample);
+ destinationLength_[i] = destinationStride_[i] *
+ ((destinationSize_.height + vertSubSample - 1) / vertSubSample);
+ }
+}
diff --git a/src/android/yuv/post_processor_yuv.h b/src/android/yuv/post_processor_yuv.h
new file mode 100644
index 00000000..c58b4cf7
--- /dev/null
+++ b/src/android/yuv/post_processor_yuv.h
@@ -0,0 +1,42 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2021, Google Inc.
+ *
+ * post_processor_yuv.h - Post Processor using libyuv
+ */
+#ifndef __ANDROID_POST_PROCESSOR_YUV_H__
+#define __ANDROID_POST_PROCESSOR_YUV_H__
+
+#include "../post_processor.h"
+
+#include <libcamera/geometry.h>
+
+class CameraDevice;
+
+class PostProcessorYuv : public PostProcessor
+{
+public:
+ PostProcessorYuv() = default;
+
+ int configure(const libcamera::StreamConfiguration &incfg,
+ const libcamera::StreamConfiguration &outcfg) override;
+ int process(const libcamera::FrameBuffer &source,
+ libcamera::MappedBuffer *destination,
+ const CameraMetadata &requestMetadata,
+ CameraMetadata *metadata) override;
+
+private:
+ bool isValidBuffers(const libcamera::FrameBuffer &source,
+ const libcamera::MappedBuffer &destination) const;
+ void calculateLengths(const libcamera::StreamConfiguration &inCfg,
+ const libcamera::StreamConfiguration &outCfg);
+
+ libcamera::Size sourceSize_;
+ libcamera::Size destinationSize_;
+ unsigned int sourceLength_[2] = {};
+ unsigned int destinationLength_[2] = {};
+ unsigned int sourceStride_[2] = {};
+ unsigned int destinationStride_[2] = {};
+};
+
+#endif /* __ANDROID_POST_PROCESSOR_YUV_H__ */
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