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cscore: Support multiple levels of JPEG compression (#1223)

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This allows two streams with different compression levels, and also allows
a stream to receive a different compression level than provided by a JPEG
camera (decompress and recompress).
This commit is contained in:
Peter Johnson
2018-07-27 21:51:40 -07:00
committed by GitHub
parent 04ee8dbe79
commit c9a75a119a
4 changed files with 89 additions and 27 deletions
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47
cscore/src/main/native/cpp/Frame.h
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@@ -98,6 +98,13 @@ class Frame {
return m_impl->images[0]->pixelFormat;
}
int GetOriginalJpegQuality() const {
if (!m_impl) return 0;
std::lock_guard<wpi::recursive_mutex> lock(m_impl->mutex);
if (m_impl->images.empty()) return 0;
return m_impl->images[0]->jpegQuality;
}
Image* GetExistingImage(size_t i = 0) const {
if (!m_impl) return nullptr;
std::lock_guard<wpi::recursive_mutex> lock(m_impl->mutex);
@@ -124,12 +131,31 @@ class Frame {
return nullptr;
}
Image* GetExistingImage(int width, int height,
VideoMode::PixelFormat pixelFormat,
int jpegQuality) const {
if (!m_impl) return nullptr;
std::lock_guard<wpi::recursive_mutex> lock(m_impl->mutex);
for (auto i : m_impl->images) {
if (i->Is(width, height, pixelFormat, jpegQuality)) return i;
}
return nullptr;
}
Image* GetNearestImage(int width, int height) const;
Image* GetNearestImage(int width, int height,
VideoMode::PixelFormat pixelFormat) const;
VideoMode::PixelFormat pixelFormat,
int jpegQuality = -1) const;
Image* Convert(Image* image, VideoMode::PixelFormat pixelFormat,
int jpegQuality = 80);
Image* Convert(Image* image, VideoMode::PixelFormat pixelFormat) {
if (pixelFormat == VideoMode::kMJPEG) return nullptr;
return ConvertImpl(image, pixelFormat, -1, 80);
}
Image* ConvertToMJPEG(Image* image, int requiredQuality,
int defaultQuality = 80) {
return ConvertImpl(image, VideoMode::kMJPEG, requiredQuality,
defaultQuality);
}
Image* ConvertMJPEGToBGR(Image* image);
Image* ConvertMJPEGToGray(Image* image);
Image* ConvertYUYVToBGR(Image* image);
@@ -140,8 +166,15 @@ class Frame {
Image* ConvertBGRToMJPEG(Image* image, int quality);
Image* ConvertGrayToMJPEG(Image* image, int quality);
Image* GetImage(int width, int height, VideoMode::PixelFormat pixelFormat,
int jpegQuality = 80);
Image* GetImage(int width, int height, VideoMode::PixelFormat pixelFormat) {
if (pixelFormat == VideoMode::kMJPEG) return nullptr;
return GetImageImpl(width, height, pixelFormat, -1, 80);
}
Image* GetImageMJPEG(int width, int height, int requiredQuality,
int defaultQuality = 80) {
return GetImageImpl(width, height, VideoMode::kMJPEG, requiredQuality,
defaultQuality);
}
bool GetCv(cv::Mat& image) {
return GetCv(image, GetOriginalWidth(), GetOriginalHeight());
@@ -149,6 +182,10 @@ class Frame {
bool GetCv(cv::Mat& image, int width, int height);
private:
Image* ConvertImpl(Image* image, VideoMode::PixelFormat pixelFormat,
int requiredJpegQuality, int defaultJpegQuality);
Image* GetImageImpl(int width, int height, VideoMode::PixelFormat pixelFormat,
int requiredJpegQuality, int defaultJpegQuality);
void DecRef() {
if (m_impl && --(m_impl->refcount) == 0) ReleaseFrame();
}