Add support for DCT-unaligned JPEG compression.
This cl adds ability to specify viewport before rendering to buffer
and makes sure that the buffer always includes necessary padding
when rendering into buffer used for JPEG compression.
Bug: 301023410
Test: atest virtual_camera_tests
Test: Manually examining unaligned-sized thumbnails using exiftool
Change-Id: Id20cde4633ae396be9f9e8f9422b28d2b1475740
diff --git a/services/camera/virtualcamera/util/JpegUtil.h b/services/camera/virtualcamera/util/JpegUtil.h
index 83ed74b..184dd56 100644
--- a/services/camera/virtualcamera/util/JpegUtil.h
+++ b/services/camera/virtualcamera/util/JpegUtil.h
@@ -19,17 +19,20 @@
#include <optional>
-#include "system/graphics.h"
+#include "android/hardware_buffer.h"
+#include "util/Util.h"
namespace android {
namespace companion {
namespace virtualcamera {
// Jpeg-compress image into the output buffer.
-// * width - width of the image
-// * heigh - height of the image
+// * width - width of the image, can be less than width of inBuffer.
+// * heigh - height of the image, can be less than height of inBuffer.
// * quality - 0-100, higher number corresponds to higher quality.
-// * ycbr - android_ycbr structure describing layout of input YUV420 image.
+// * inBuffer - Input buffer, the dimensions of the buffer must be aligned to
+// 2*DCT_SIZE (16) to include necessary padding in case width and height of
+// image is not aligned with 2*DCT_SIZE.
// * app1ExifData - vector containing data to be included in APP1
// segment. Can be empty.
// * outBufferSize - capacity of the output buffer.
@@ -37,10 +40,14 @@
// Returns size of compressed data if the compression was successful,
// empty optional otherwise.
std::optional<size_t> compressJpeg(int width, int height, int quality,
- const android_ycbcr& ycbcr,
+ std::shared_ptr<AHardwareBuffer> inBuffer,
const std::vector<uint8_t>& app1ExifData,
size_t outBufferSize, void* outBuffer);
+// Round the resolution to the closest higher resolution where width and height
+// are divisible by 2*DCT_SIZE ().
+Resolution roundTo2DctSize(Resolution resolution);
+
} // namespace virtualcamera
} // namespace companion
} // namespace android