media: v4l2-dv-timings: add v4l2_hdmi_colorimetry()
Add the v4l2_hdmi_colorimetry() function so we have a single function that determines the colorspace, YCbCr encoding, quantization range and transfer function from the InfoFrame data. Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com> Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
This commit is contained in:
Hans Verkuil
Mauro Carvalho Chehab
Родитель
bd2a0f082b
Коммит
357a856a6c
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@ -14,6 +14,7 @@
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#include <linux/v4l2-dv-timings.h>
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#include <media/v4l2-dv-timings.h>
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#include <linux/math64.h>
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#include <linux/hdmi.h>
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MODULE_AUTHOR("Hans Verkuil");
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MODULE_DESCRIPTION("V4L2 DV Timings Helper Functions");
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@ -801,3 +802,143 @@ struct v4l2_fract v4l2_calc_aspect_ratio(u8 hor_landscape, u8 vert_portrait)
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return aspect;
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}
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EXPORT_SYMBOL_GPL(v4l2_calc_aspect_ratio);
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/** v4l2_hdmi_rx_colorimetry - determine HDMI colorimetry information
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* based on various InfoFrames.
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* @avi: the AVI InfoFrame
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* @hdmi: the HDMI Vendor InfoFrame, may be NULL
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* @height: the frame height
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*
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* Determines the HDMI colorimetry information, i.e. how the HDMI
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* pixel color data should be interpreted.
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*
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* Note that some of the newer features (DCI-P3, HDR) are not yet
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* implemented: the hdmi.h header needs to be updated to the HDMI 2.0
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* and CTA-861-G standards.
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*/
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struct v4l2_hdmi_colorimetry
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v4l2_hdmi_rx_colorimetry(const struct hdmi_avi_infoframe *avi,
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const struct hdmi_vendor_infoframe *hdmi,
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unsigned int height)
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{
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struct v4l2_hdmi_colorimetry c = {
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V4L2_COLORSPACE_SRGB,
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V4L2_YCBCR_ENC_DEFAULT,
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V4L2_QUANTIZATION_FULL_RANGE,
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V4L2_XFER_FUNC_SRGB
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};
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bool is_ce = avi->video_code || (hdmi && hdmi->vic);
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bool is_sdtv = height <= 576;
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bool default_is_lim_range_rgb = avi->video_code > 1;
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switch (avi->colorspace) {
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case HDMI_COLORSPACE_RGB:
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/* RGB pixel encoding */
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switch (avi->colorimetry) {
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case HDMI_COLORIMETRY_EXTENDED:
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switch (avi->extended_colorimetry) {
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case HDMI_EXTENDED_COLORIMETRY_ADOBE_RGB:
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c.colorspace = V4L2_COLORSPACE_ADOBERGB;
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c.xfer_func = V4L2_XFER_FUNC_ADOBERGB;
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break;
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case HDMI_EXTENDED_COLORIMETRY_BT2020:
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c.colorspace = V4L2_COLORSPACE_BT2020;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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default:
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break;
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}
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break;
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default:
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break;
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}
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switch (avi->quantization_range) {
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case HDMI_QUANTIZATION_RANGE_LIMITED:
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c.quantization = V4L2_QUANTIZATION_LIM_RANGE;
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break;
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case HDMI_QUANTIZATION_RANGE_FULL:
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break;
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default:
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if (default_is_lim_range_rgb)
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c.quantization = V4L2_QUANTIZATION_LIM_RANGE;
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break;
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}
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break;
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default:
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/* YCbCr pixel encoding */
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c.quantization = V4L2_QUANTIZATION_LIM_RANGE;
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switch (avi->colorimetry) {
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case HDMI_COLORIMETRY_NONE:
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if (!is_ce)
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break;
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if (is_sdtv) {
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c.colorspace = V4L2_COLORSPACE_SMPTE170M;
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c.ycbcr_enc = V4L2_YCBCR_ENC_601;
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} else {
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c.colorspace = V4L2_COLORSPACE_REC709;
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c.ycbcr_enc = V4L2_YCBCR_ENC_709;
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}
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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case HDMI_COLORIMETRY_ITU_601:
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c.colorspace = V4L2_COLORSPACE_SMPTE170M;
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c.ycbcr_enc = V4L2_YCBCR_ENC_601;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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case HDMI_COLORIMETRY_ITU_709:
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c.colorspace = V4L2_COLORSPACE_REC709;
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c.ycbcr_enc = V4L2_YCBCR_ENC_709;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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case HDMI_COLORIMETRY_EXTENDED:
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switch (avi->extended_colorimetry) {
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case HDMI_EXTENDED_COLORIMETRY_XV_YCC_601:
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c.colorspace = V4L2_COLORSPACE_REC709;
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c.ycbcr_enc = V4L2_YCBCR_ENC_XV709;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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case HDMI_EXTENDED_COLORIMETRY_XV_YCC_709:
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c.colorspace = V4L2_COLORSPACE_REC709;
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c.ycbcr_enc = V4L2_YCBCR_ENC_XV601;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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case HDMI_EXTENDED_COLORIMETRY_S_YCC_601:
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c.colorspace = V4L2_COLORSPACE_SRGB;
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c.ycbcr_enc = V4L2_YCBCR_ENC_601;
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c.xfer_func = V4L2_XFER_FUNC_SRGB;
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break;
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case HDMI_EXTENDED_COLORIMETRY_ADOBE_YCC_601:
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c.colorspace = V4L2_COLORSPACE_ADOBERGB;
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c.ycbcr_enc = V4L2_YCBCR_ENC_601;
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c.xfer_func = V4L2_XFER_FUNC_ADOBERGB;
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break;
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case HDMI_EXTENDED_COLORIMETRY_BT2020:
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c.colorspace = V4L2_COLORSPACE_BT2020;
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c.ycbcr_enc = V4L2_YCBCR_ENC_BT2020;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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case HDMI_EXTENDED_COLORIMETRY_BT2020_CONST_LUM:
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c.colorspace = V4L2_COLORSPACE_BT2020;
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c.ycbcr_enc = V4L2_YCBCR_ENC_BT2020_CONST_LUM;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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default: /* fall back to ITU_709 */
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c.colorspace = V4L2_COLORSPACE_REC709;
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c.ycbcr_enc = V4L2_YCBCR_ENC_709;
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c.xfer_func = V4L2_XFER_FUNC_709;
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break;
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}
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break;
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default:
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break;
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}
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/*
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* YCC Quantization Range signaling is more-or-less broken,
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* let's just ignore this.
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*/
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break;
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}
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return c;
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}
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EXPORT_SYMBOL_GPL(v4l2_hdmi_rx_colorimetry);
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@ -212,5 +212,26 @@ static inline bool can_reduce_fps(struct v4l2_bt_timings *bt)
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return false;
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}
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/**
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* struct v4l2_hdmi_rx_colorimetry - describes the HDMI colorimetry information
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* @colorspace: enum v4l2_colorspace, the colorspace
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* @ycbcr_enc: enum v4l2_ycbcr_encoding, Y'CbCr encoding
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* @quantization: enum v4l2_quantization, colorspace quantization
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* @xfer_func: enum v4l2_xfer_func, colorspace transfer function
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*/
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struct v4l2_hdmi_colorimetry {
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enum v4l2_colorspace colorspace;
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enum v4l2_ycbcr_encoding ycbcr_enc;
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enum v4l2_quantization quantization;
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enum v4l2_xfer_func xfer_func;
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};
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struct hdmi_avi_infoframe;
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struct hdmi_vendor_infoframe;
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struct v4l2_hdmi_colorimetry
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v4l2_hdmi_rx_colorimetry(const struct hdmi_avi_infoframe *avi,
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const struct hdmi_vendor_infoframe *hdmi,
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unsigned int height);
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#endif
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