diff options
Diffstat (limited to 'drivers/media/usb')
-rw-r--r-- | drivers/media/usb/uvc/uvc_driver.c | 64 | ||||
-rw-r--r-- | drivers/media/usb/uvc/uvc_v4l2.c | 4 | ||||
-rw-r--r-- | drivers/media/usb/uvc/uvcvideo.h | 4 |
3 files changed, 67 insertions, 5 deletions
diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c index 3b48451ead1f..ddb9eaa11be7 100644 --- a/drivers/media/usb/uvc/uvc_driver.c +++ b/drivers/media/usb/uvc/uvc_driver.c @@ -253,10 +253,10 @@ static struct uvc_format_desc *uvc_format_by_guid(const u8 guid[16]) return NULL; } -static u32 uvc_colorspace(const u8 primaries) +static enum v4l2_colorspace uvc_colorspace(const u8 primaries) { - static const u8 colorprimaries[] = { - 0, + static const enum v4l2_colorspace colorprimaries[] = { + V4L2_COLORSPACE_DEFAULT, /* Unspecified */ V4L2_COLORSPACE_SRGB, V4L2_COLORSPACE_470_SYSTEM_M, V4L2_COLORSPACE_470_SYSTEM_BG, @@ -267,7 +267,61 @@ static u32 uvc_colorspace(const u8 primaries) if (primaries < ARRAY_SIZE(colorprimaries)) return colorprimaries[primaries]; - return 0; + return V4L2_COLORSPACE_DEFAULT; /* Reserved */ +} + +static enum v4l2_xfer_func uvc_xfer_func(const u8 transfer_characteristics) +{ + /* + * V4L2 does not currently have definitions for all possible values of + * UVC transfer characteristics. If v4l2_xfer_func is extended with new + * values, the mapping below should be updated. + * + * Substitutions are taken from the mapping given for + * V4L2_XFER_FUNC_DEFAULT documented in videodev2.h. + */ + static const enum v4l2_xfer_func xfer_funcs[] = { + V4L2_XFER_FUNC_DEFAULT, /* Unspecified */ + V4L2_XFER_FUNC_709, + V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 M */ + V4L2_XFER_FUNC_709, /* Substitution for BT.470-2 B, G */ + V4L2_XFER_FUNC_709, /* Substitution for SMPTE 170M */ + V4L2_XFER_FUNC_SMPTE240M, + V4L2_XFER_FUNC_NONE, + V4L2_XFER_FUNC_SRGB, + }; + + if (transfer_characteristics < ARRAY_SIZE(xfer_funcs)) + return xfer_funcs[transfer_characteristics]; + + return V4L2_XFER_FUNC_DEFAULT; /* Reserved */ +} + +static enum v4l2_ycbcr_encoding uvc_ycbcr_enc(const u8 matrix_coefficients) +{ + /* + * V4L2 does not currently have definitions for all possible values of + * UVC matrix coefficients. If v4l2_ycbcr_encoding is extended with new + * values, the mapping below should be updated. + * + * Substitutions are taken from the mapping given for + * V4L2_YCBCR_ENC_DEFAULT documented in videodev2.h. + * + * FCC is assumed to be close enough to 601. + */ + static const enum v4l2_ycbcr_encoding ycbcr_encs[] = { + V4L2_YCBCR_ENC_DEFAULT, /* Unspecified */ + V4L2_YCBCR_ENC_709, + V4L2_YCBCR_ENC_601, /* Substitution for FCC */ + V4L2_YCBCR_ENC_601, /* Substitution for BT.470-2 B, G */ + V4L2_YCBCR_ENC_601, + V4L2_YCBCR_ENC_SMPTE240M, + }; + + if (matrix_coefficients < ARRAY_SIZE(ycbcr_encs)) + return ycbcr_encs[matrix_coefficients]; + + return V4L2_YCBCR_ENC_DEFAULT; /* Reserved */ } /* Simplify a fraction using a simple continued fraction decomposition. The @@ -709,6 +763,8 @@ static int uvc_parse_format(struct uvc_device *dev, } format->colorspace = uvc_colorspace(buffer[3]); + format->xfer_func = uvc_xfer_func(buffer[4]); + format->ycbcr_enc = uvc_ycbcr_enc(buffer[5]); buflen -= buffer[0]; buffer += buffer[0]; diff --git a/drivers/media/usb/uvc/uvc_v4l2.c b/drivers/media/usb/uvc/uvc_v4l2.c index 5e6f3153b5ff..fa06bfa174ad 100644 --- a/drivers/media/usb/uvc/uvc_v4l2.c +++ b/drivers/media/usb/uvc/uvc_v4l2.c @@ -283,6 +283,8 @@ static int uvc_v4l2_try_format(struct uvc_streaming *stream, fmt->fmt.pix.sizeimage = probe->dwMaxVideoFrameSize; fmt->fmt.pix.pixelformat = format->fcc; fmt->fmt.pix.colorspace = format->colorspace; + fmt->fmt.pix.xfer_func = format->xfer_func; + fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc; if (uvc_format != NULL) *uvc_format = format; @@ -319,6 +321,8 @@ static int uvc_v4l2_get_format(struct uvc_streaming *stream, fmt->fmt.pix.bytesperline = uvc_v4l2_get_bytesperline(format, frame); fmt->fmt.pix.sizeimage = stream->ctrl.dwMaxVideoFrameSize; fmt->fmt.pix.colorspace = format->colorspace; + fmt->fmt.pix.xfer_func = format->xfer_func; + fmt->fmt.pix.ycbcr_enc = format->ycbcr_enc; done: mutex_unlock(&stream->mutex); diff --git a/drivers/media/usb/uvc/uvcvideo.h b/drivers/media/usb/uvc/uvcvideo.h index c7f043121b41..a3dfacf069c4 100644 --- a/drivers/media/usb/uvc/uvcvideo.h +++ b/drivers/media/usb/uvc/uvcvideo.h @@ -374,7 +374,9 @@ struct uvc_format { u8 type; u8 index; u8 bpp; - u8 colorspace; + enum v4l2_colorspace colorspace; + enum v4l2_xfer_func xfer_func; + enum v4l2_ycbcr_encoding ycbcr_enc; u32 fcc; u32 flags; |