From 0e59fd0592430cee4595c600427899a3404861e7 Mon Sep 17 00:00:00 2001 From: Hans de Goede Date: Wed, 11 May 2011 09:56:20 -0300 Subject: [media] v4l: Add M420 format definition M420 is a hybrid YUV 4:2:0 packet/planar format. Two Y lines are followed by an interleaved U/V line. Signed-off-by: Hans de Goede [laurent.pinchart@ideasonboard.com: split into v4l/uvcvideo patches] [laurent.pinchart@ideasonboard.com: add documentation] Signed-off-by: Laurent Pinchart Signed-off-by: Mauro Carvalho Chehab --- Documentation/DocBook/media-entities.tmpl | 1 + Documentation/DocBook/v4l/pixfmt-m420.xml | 147 ++++++++++++++++++++++++++++++ Documentation/DocBook/v4l/pixfmt.xml | 1 + Documentation/DocBook/v4l/videodev2.h.xml | 1 + 4 files changed, 150 insertions(+) create mode 100644 Documentation/DocBook/v4l/pixfmt-m420.xml (limited to 'Documentation/DocBook') diff --git a/Documentation/DocBook/media-entities.tmpl b/Documentation/DocBook/media-entities.tmpl index 7a9570887d2..c8abb23ef1e 100644 --- a/Documentation/DocBook/media-entities.tmpl +++ b/Documentation/DocBook/media-entities.tmpl @@ -270,6 +270,7 @@ + diff --git a/Documentation/DocBook/v4l/pixfmt-m420.xml b/Documentation/DocBook/v4l/pixfmt-m420.xml new file mode 100644 index 00000000000..ce4bc019e5c --- /dev/null +++ b/Documentation/DocBook/v4l/pixfmt-m420.xml @@ -0,0 +1,147 @@ + + + V4L2_PIX_FMT_M420 ('M420') + &manvol; + + + V4L2_PIX_FMT_M420 + Format with ½ horizontal and vertical chroma + resolution, also known as YUV 4:2:0. Hybrid plane line-interleaved + layout. + + + Description + + M420 is a YUV format with ½ horizontal and vertical chroma + subsampling (YUV 4:2:0). Pixels are organized as interleaved luma and + chroma planes. Two lines of luma data are followed by one line of chroma + data. + The luma plane has one byte per pixel. The chroma plane contains + interleaved CbCr pixels subsampled by ½ in the horizontal and + vertical directions. Each CbCr pair belongs to four pixels. For example, +Cb0/Cr0 belongs to +Y'00, Y'01, +Y'10, Y'11. + + All line lengths are identical: if the Y lines include pad bytes + so do the CbCr lines. + + + <constant>V4L2_PIX_FMT_M420</constant> 4 × 4 +pixel image + + + Byte Order. + Each cell is one byte. + + + + + + start + 0: + Y'00 + Y'01 + Y'02 + Y'03 + + + start + 4: + Y'10 + Y'11 + Y'12 + Y'13 + + + start + 8: + Cb00 + Cr00 + Cb01 + Cr01 + + + start + 16: + Y'20 + Y'21 + Y'22 + Y'23 + + + start + 20: + Y'30 + Y'31 + Y'32 + Y'33 + + + start + 24: + Cb10 + Cr10 + Cb11 + Cr11 + + + + + + + + + Color Sample Location. + + + + + + + 01 + 23 + + + 0 + YY + YY + + + + C + C + + + 1 + YY + YY + + + + + + 2 + YY + YY + + + + C + C + + + 3 + YY + YY + + + + + + + + + + + diff --git a/Documentation/DocBook/v4l/pixfmt.xml b/Documentation/DocBook/v4l/pixfmt.xml index 3486a068fe4..dbfe3b08435 100644 --- a/Documentation/DocBook/v4l/pixfmt.xml +++ b/Documentation/DocBook/v4l/pixfmt.xml @@ -713,6 +713,7 @@ information. &sub-nv12m; &sub-nv12mt; &sub-nv16; + &sub-m420;
diff --git a/Documentation/DocBook/v4l/videodev2.h.xml b/Documentation/DocBook/v4l/videodev2.h.xml index 937acf54da9..c50536a4f59 100644 --- a/Documentation/DocBook/v4l/videodev2.h.xml +++ b/Documentation/DocBook/v4l/videodev2.h.xml @@ -336,6 +336,7 @@ struct v4l2_pix_format { #define V4L2_PIX_FMT_YUV420 v4l2_fourcc('Y', 'U', '1', '2') /* 12 YUV 4:2:0 */ #define V4L2_PIX_FMT_HI240 v4l2_fourcc('H', 'I', '2', '4') /* 8 8-bit color */ #define V4L2_PIX_FMT_HM12 v4l2_fourcc('H', 'M', '1', '2') /* 8 YUV 4:2:0 16x16 macroblocks */ +#define V4L2_PIX_FMT_M420 v4l2_fourcc('M', '4', '2', '0') /* 12 YUV 4:2:0 2 lines y, 1 line uv interleaved */ /* two planes -- one Y, one Cr + Cb interleaved */ #define V4L2_PIX_FMT_NV12 v4l2_fourcc('N', 'V', '1', '2') /* 12 Y/CbCr 4:2:0 */ -- cgit v1.2.3-70-g09d2