genesys: Remove no longer used ImageBufferGenesysUsb

backend/genesys/fwd.h

@@ -74,7 +74,6 @@ class Image;
 
 // image_buffer.h
 class ImageBuffer;
-class ImageBufferGenesysUsb;
 
 // image_pipeline.h
 class ImagePipelineNode;

backend/genesys/image_buffer.cpp

@@ -107,77 +107,4 @@ bool ImageBuffer::get_data(std::size_t size, std::uint8_t* out_data)
     return got_data;
 }
 
-ImageBufferGenesysUsb::ImageBufferGenesysUsb(std::size_t total_size,
-                                             std::size_t buffer_size,
-                                             ProducerCallback producer) :
-    remaining_size_{total_size},
-    buffer_size_{buffer_size},
-    producer_{producer}
-{}
-
-bool ImageBufferGenesysUsb::get_data(std::size_t size, std::uint8_t* out_data)
-{
-    const std::uint8_t* out_data_end = out_data + size;
-
-    auto copy_buffer = [&]()
-    {
-        std::size_t bytes_copy = std::min<std::size_t>(out_data_end - out_data, available());
-        std::memcpy(out_data, buffer_.data() + buffer_offset_, bytes_copy);
-        out_data += bytes_copy;
-        buffer_offset_ += bytes_copy;
-    };
-
-    // first, read remaining data from buffer
-    if (available() > 0) {
-        copy_buffer();
-    }
-
-    if (out_data == out_data_end) {
-        return true;
-    }
-
-    // now the buffer is empty and there's more data to be read
-    do {
-        if (remaining_size_ == 0)
-            return false;
-
-        auto bytes_to_read = get_read_size();
-        buffer_offset_ = 0;
-        buffer_end_ = bytes_to_read;
-        buffer_.resize(bytes_to_read);
-
-        producer_(bytes_to_read, buffer_.data());
-
-        if (remaining_size_ < bytes_to_read) {
-            remaining_size_ = 0;
-        } else {
-            remaining_size_ -= bytes_to_read;
-        }
-
-        copy_buffer();
-    } while(out_data < out_data_end);
-    return true;
-}
-
-std::size_t ImageBufferGenesysUsb::get_read_size()
-{
-    std::size_t size = buffer_size_;
-
-    // never read an odd number. exception: last read
-    // the chip internal counter does not count half words.
-    size &= ~1;
-
-    // Some setups need the reads to be multiples of 256 bytes
-    size &= ~0xff;
-
-    if (remaining_size_ < size) {
-        size = remaining_size_;
-        /*round up to a multiple of 256 bytes */
-        size += (size & 0xff) ? 0x100 : 0x00;
-        size &= ~0xff;
-    }
-
-    return size;
-}
-
 } // namespace genesys

backend/genesys/image_buffer.h

@@ -85,40 +85,6 @@ private:
     std::vector<std::uint8_t> buffer_;
 };
 
-// This class is similar to ImageBuffer, but preserves historical peculiarities of buffer handling
-// in the backend to preserve exact behavior
-class ImageBufferGenesysUsb
-{
-public:
-    using ProducerCallback = std::function<void(std::size_t size, std::uint8_t* out_data)>;
-
-    ImageBufferGenesysUsb() {}
-    ImageBufferGenesysUsb(std::size_t total_size, std::size_t buffer_size,
-                          ProducerCallback producer);
-
-    std::size_t remaining_size() const { return remaining_size_; }
-
-    void set_remaining_size(std::size_t bytes) { remaining_size_ = bytes; }
-
-    std::size_t available() const { return buffer_end_ - buffer_offset_; }
-
-    bool get_data(std::size_t size, std::uint8_t* out_data);
-
-private:
-
-    std::size_t get_read_size();
-
-    std::size_t remaining_size_ = 0;
-
-    std::size_t buffer_size_ = 0;
-
-    std::size_t buffer_offset_ = 0;
-    std::size_t buffer_end_ = 0;
-    std::vector<std::uint8_t> buffer_;
-
-    ProducerCallback producer_;
-};
-
 } // namespace genesys
 
 #endif // BACKEND_GENESYS_IMAGE_BUFFER_H