Make Futatabi copy Exif data for interpolated frames.

[nageru] / futatabi / jpeg_frame_view.cpp

diff --git a/futatabi/jpeg_frame_view.cpp b/futatabi/jpeg_frame_view.cpp
index 943b3e15ac5858886472c1866371debc9e6eb733..d471634932da364c3e4a80229948b351511c6913 100644 (file)
--- a/futatabi/jpeg_frame_view.cpp
+++ b/futatabi/jpeg_frame_view.cpp
@@ -109,6 +109,8 @@ shared_ptr<Frame> decode_jpeg(const string &jpeg)
                return get_black_frame();
        }
 
+       jpeg_save_markers(&dinfo, JPEG_APP0 + 1, 0xFFFF);
+
        if (dinfo.num_components != 3) {
                fprintf(stderr, "Not a color JPEG. (%d components, Y=%dx%d, Cb=%dx%d, Cr=%dx%d)\n",
                        dinfo.num_components,
@@ -159,6 +161,14 @@ shared_ptr<Frame> decode_jpeg(const string &jpeg)
        frame->pitch_y = luma_width_blocks * DCTSIZE;
        frame->pitch_chroma = chroma_width_blocks * DCTSIZE;
 
+       if (dinfo.marker_list != nullptr &&
+           dinfo.marker_list->marker == JPEG_APP0 + 1 &&
+           dinfo.marker_list->data_length >= 4 &&
+           memcmp(dinfo.marker_list->data, "Exif", 4) == 0) {
+               frame->exif_data.assign(reinterpret_cast<char *>(dinfo.marker_list->data),
+                       dinfo.marker_list->data_length);
+       }
+
        if (!error_mgr.run([&dinfo, &frame, v_mcu_size, mcu_height_blocks] {
                    JSAMPROW yptr[v_mcu_size], cbptr[v_mcu_size], crptr[v_mcu_size];
                    JSAMPARRAY data[3] = { yptr, cbptr, crptr };