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-rw-r--r--include/media/v4l2-jpeg.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/include/media/v4l2-jpeg.h b/include/media/v4l2-jpeg.h
index ddba2a56c321..2dba843ce3bd 100644
--- a/include/media/v4l2-jpeg.h
+++ b/include/media/v4l2-jpeg.h
@@ -88,10 +88,30 @@ struct v4l2_jpeg_scan_header {
};
/**
+ * enum v4l2_jpeg_app14_tf - APP14 transform flag
+ * According to Rec. ITU-T T.872 (06/2012) 6.5.3
+ * APP14 segment is for color encoding, it contains a transform flag,
+ * which may have values of 0, 1 and 2 and are interpreted as follows:
+ * @V4L2_JPEG_APP14_TF_CMYK_RGB: CMYK for images encoded with four components
+ * RGB for images encoded with three components
+ * @V4L2_JPEG_APP14_TF_YCBCR: an image encoded with three components using YCbCr
+ * @V4L2_JPEG_APP14_TF_YCCK: an image encoded with four components using YCCK
+ * @V4L2_JPEG_APP14_TF_UNKNOWN: indicate app14 is not present
+ */
+enum v4l2_jpeg_app14_tf {
+ V4L2_JPEG_APP14_TF_CMYK_RGB = 0,
+ V4L2_JPEG_APP14_TF_YCBCR = 1,
+ V4L2_JPEG_APP14_TF_YCCK = 2,
+ V4L2_JPEG_APP14_TF_UNKNOWN = -1,
+};
+
+/**
* struct v4l2_jpeg_header - parsed JPEG header
* @sof: pointer to frame header and size
* @sos: pointer to scan header and size
+ * @num_dht: number of entries in @dht
* @dht: pointers to huffman tables and sizes
+ * @num_dqt: number of entries in @dqt
* @dqt: pointers to quantization tables and sizes
* @frame: parsed frame header
* @scan: pointer to parsed scan header, optional
@@ -100,6 +120,7 @@ struct v4l2_jpeg_scan_header {
* order, optional
* @restart_interval: number of MCU per restart interval, Ri
* @ecs_offset: buffer offset in bytes to the entropy coded segment
+ * @app14_tf: transform flag from app14 data
*
* When this structure is passed to v4l2_jpeg_parse_header, the optional scan,
* quantization_tables, and huffman_tables pointers must be initialized to NULL
@@ -119,6 +140,7 @@ struct v4l2_jpeg_header {
struct v4l2_jpeg_reference *huffman_tables;
u16 restart_interval;
size_t ecs_offset;
+ enum v4l2_jpeg_app14_tf app14_tf;
};
int v4l2_jpeg_parse_header(void *buf, size_t len, struct v4l2_jpeg_header *out);