Swap width and height in TouchVideoFrame
Currently in TouchVideoFrame and related code, the field 'width'
precedes the field 'height'.
But these fields should be interpreted as follows:
width -> number of columns
height -> number of rows
In most notations in mathematics, the matrix sizes are designated as
'mxn', where m is the number of rows and n is the number of columns.
So we make TouchVideoFrame consistent with this, and swap these 2
fields.
Test: atest libinput_tests
The actual test is added in the next commit.
Bug: 123241238
Change-Id: I808e7f354bd7b62d5599324eef205bf4450a91c1
diff --git a/services/inputflinger/TouchVideoDevice.cpp b/services/inputflinger/TouchVideoDevice.cpp
index ad70ccc..76df3a1 100644
--- a/services/inputflinger/TouchVideoDevice.cpp
+++ b/services/inputflinger/TouchVideoDevice.cpp
@@ -37,10 +37,10 @@
namespace android {
TouchVideoDevice::TouchVideoDevice(int fd, std::string&& name, std::string&& devicePath,
- uint32_t width, uint32_t height,
+ uint32_t height, uint32_t width,
const std::array<const int16_t*, NUM_BUFFERS>& readLocations) :
mFd(fd), mName(std::move(name)), mPath(std::move(devicePath)),
- mWidth(width), mHeight(height),
+ mHeight(height), mWidth(width),
mReadLocations(readLocations) {
mFrames.reserve(MAX_QUEUE_SIZE);
};
@@ -87,9 +87,9 @@
ALOGE("VIDIOC_G_FMT failed: %s", strerror(errno));
return nullptr;
}
- const uint32_t width = v4l2_fmt.fmt.pix.width;
const uint32_t height = v4l2_fmt.fmt.pix.height;
- ALOGI("Frame dimensions: width = %" PRIu32 " height = %" PRIu32, width, height);
+ const uint32_t width = v4l2_fmt.fmt.pix.width;
+ ALOGI("Frame dimensions: height = %" PRIu32 " width = %" PRIu32, height, width);
struct v4l2_requestbuffers req;
req.count = NUM_BUFFERS;
@@ -116,7 +116,7 @@
ALOGE("VIDIOC_QUERYBUF failed: %s", strerror(errno));
return nullptr;
}
- if (buf.length != width * height * sizeof(int16_t)) {
+ if (buf.length != height * width * sizeof(int16_t)) {
ALOGE("Unexpected value of buf.length = %i (offset = %" PRIu32 ")",
buf.length, buf.m.offset);
return nullptr;
@@ -148,7 +148,7 @@
}
// Using 'new' to access a non-public constructor.
return std::unique_ptr<TouchVideoDevice>(new TouchVideoDevice(
- fd.release(), std::move(name), std::move(devicePath), width, height, readLocations));
+ fd.release(), std::move(name), std::move(devicePath), height, width, readLocations));
}
size_t TouchVideoDevice::readAndQueueFrames() {
@@ -193,10 +193,10 @@
ALOGW("The timestamp %ld.%ld was not acquired using CLOCK_MONOTONIC",
buf.timestamp.tv_sec, buf.timestamp.tv_usec);
}
- std::vector<int16_t> data(mWidth * mHeight);
+ std::vector<int16_t> data(mHeight * mWidth);
const int16_t* readFrom = mReadLocations[buf.index];
- std::copy(readFrom, readFrom + mWidth * mHeight, data.begin());
- TouchVideoFrame frame(mWidth, mHeight, std::move(data), buf.timestamp);
+ std::copy(readFrom, readFrom + mHeight * mWidth, data.begin());
+ TouchVideoFrame frame(mHeight, mWidth, std::move(data), buf.timestamp);
result = ioctl(mFd.get(), VIDIOC_QBUF, &buf);
if (result == -1) {
@@ -230,7 +230,7 @@
}
for (const int16_t* buffer : mReadLocations) {
void* bufferAddress = static_cast<void*>(const_cast<int16_t*>(buffer));
- result = munmap(bufferAddress, mWidth * mHeight * sizeof(int16_t));
+ result = munmap(bufferAddress, mHeight * mWidth * sizeof(int16_t));
if (result == -1) {
ALOGE("%s: Couldn't unmap: [%s]", __func__, strerror(errno));
}
@@ -238,9 +238,9 @@
}
std::string TouchVideoDevice::dump() const {
- return StringPrintf("Video device %s (%s) : width=%" PRIu32 ", height=%" PRIu32
+ return StringPrintf("Video device %s (%s) : height=%" PRIu32 ", width=%" PRIu32
", fd=%i, hasValidFd=%s",
- mName.c_str(), mPath.c_str(), mWidth, mHeight, mFd.get(),
+ mName.c_str(), mPath.c_str(), mHeight, mWidth, mFd.get(),
hasValidFd() ? "true" : "false");
}