android: jpeg: Add JEA implementation

This patch adds JEA implementation to replace libjpeg in CrOS platform,
where hardware accelerator is available.

Signed-off-by: Harvey Yang <chenghaoyang@chromium.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/android/cros/camera3_hal.cpp

@@ -8,9 +8,11 @@
 #include <cros-camera/cros_camera_hal.h>
 
 #include "../camera_hal_manager.h"
+#include "../cros_mojo_token.h"
 
-static void set_up([[maybe_unused]] cros::CameraMojoChannelManagerToken *token)
+static void set_up(cros::CameraMojoChannelManagerToken *token)
 {
+	gCrosMojoToken = token;
 }
 
 static void tear_down()

src/android/cros_mojo_token.h

@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2022, Google Inc.
+ *
+ * cros_mojo_token.h - cros-specific mojo token
+ */
+
+#pragma once
+
+#include <cros-camera/cros_camera_hal.h>
+
+inline cros::CameraMojoChannelManagerToken *gCrosMojoToken = nullptr;

src/android/jpeg/encoder_jea.cpp

@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2022, Google Inc.
+ *
+ * encoder_jea.cpp - JPEG encoding using CrOS JEA
+ */
+
+#include "encoder_jea.h"
+
+#include "libcamera/internal/mapped_framebuffer.h"
+
+#include <cros-camera/camera_mojo_channel_manager_token.h>
+
+#include "../cros_mojo_token.h"
+#include "../hal_framebuffer.h"
+
+EncoderJea::EncoderJea() = default;
+
+EncoderJea::~EncoderJea() = default;
+
+int EncoderJea::configure(const libcamera::StreamConfiguration &cfg)
+{
+	size_ = cfg.size;
+
+	if (jpegCompressor_)
+		return 0;
+
+	if (gCrosMojoToken == nullptr)
+		return -ENOTSUP;
+
+	jpegCompressor_ = cros::JpegCompressor::GetInstance(gCrosMojoToken);
+
+	return 0;
+}
+
+int EncoderJea::encode(Camera3RequestDescriptor::StreamBuffer *buffer,
+		       libcamera::Span<const uint8_t> exifData,
+		       unsigned int quality)
+{
+	if (!jpegCompressor_)
+		return -ENOTSUP;
+
+	uint32_t outDataSize = 0;
+	const HALFrameBuffer *fb =
+		dynamic_cast<const HALFrameBuffer *>(buffer->srcBuffer);
+
+	if (!jpegCompressor_->CompressImageFromHandle(fb->handle(),
+						      *buffer->camera3Buffer,
+						      size_.width, size_.height,
+						      quality, exifData.data(),
+						      exifData.size(),
+						      &outDataSize))
+		return -EBUSY;
+
+	return outDataSize;
+}

src/android/jpeg/encoder_jea.h

@@ -0,0 +1,31 @@
+/* SPDX-License-Identifier: LGPL-2.1-or-later */
+/*
+ * Copyright (C) 2022, Google Inc.
+ *
+ * encoder_jea.h - JPEG encoding using CrOS JEA
+ */
+
+#pragma once
+
+#include <libcamera/geometry.h>
+
+#include <cros-camera/jpeg_compressor.h>
+
+#include "encoder.h"
+
+class EncoderJea : public Encoder
+{
+public:
+	EncoderJea();
+	~EncoderJea();
+
+	int configure(const libcamera::StreamConfiguration &cfg) override;
+	int encode(Camera3RequestDescriptor::StreamBuffer *buffer,
+		   libcamera::Span<const uint8_t> exifData,
+		   unsigned int quality) override;
+
+private:
+	libcamera::Size size_;
+
+	std::unique_ptr<cros::JpegCompressor> jpegCompressor_;
+};

src/android/jpeg/meson.build

@@ -6,3 +6,9 @@ android_hal_sources += files([
     'post_processor_jpeg.cpp',
     'thumbnailer.cpp'
 ])
+
+platform = get_option('android_platform')
+if platform == 'cros'
+    android_hal_sources += files(['encoder_jea.cpp'])
+    android_deps += [dependency('libcros_camera')]
+endif

src/android/jpeg/post_processor_jpeg.cpp

@@ -12,7 +12,11 @@
 #include "../camera_device.h"
 #include "../camera_metadata.h"
 #include "../camera_request.h"
+#if defined(OS_CHROMEOS)
+#include "encoder_jea.h"
+#else /* !defined(OS_CHROMEOS) */
 #include "encoder_libjpeg.h"
+#endif
 #include "exif.h"
 
 #include <libcamera/base/log.h>
@@ -46,7 +50,11 @@ int PostProcessorJpeg::configure(const StreamConfiguration &inCfg,
 
 	thumbnailer_.configure(inCfg.size, inCfg.pixelFormat);
 
+#if defined(OS_CHROMEOS)
+	encoder_ = std::make_unique<EncoderJea>();
+#else /* !defined(OS_CHROMEOS) */
 	encoder_ = std::make_unique<EncoderLibJpeg>();
+#endif
 
 	return encoder_->configure(inCfg);
 }