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| author | Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com> | 2017-06-12 16:26:17 +0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2017-06-20 13:04:40 +0300 |
| commit | e744ee280311ac220930ae49417b79165c887a3a (patch) | |
| tree | 80c9368788139ecaf16651e3dc0c612acd6afed2 /Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst | |
| parent | c28f2118a2129f8e2c1cdf2454ffe4833885edff (diff) | |
| download | linux-e744ee280311ac220930ae49417b79165c887a3a.tar.xz | |
[media] doc_rst: media: New SDR formats PC16, PC18 & PC20
This patch adds documentation for the three new SDR formats
V4L2_SDR_FMT_PCU16BE
V4L2_SDR_FMT_PCU18BE
V4L2_SDR_FMT_PCU20BE
Signed-off-by: Ramesh Shanmugasundaram <ramesh.shanmugasundaram@bp.renesas.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Diffstat (limited to 'Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst')
| -rw-r--r-- | Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst new file mode 100644 index 000000000000..5499eed39477 --- /dev/null +++ b/Documentation/media/uapi/v4l/pixfmt-sdr-pcu20be.rst @@ -0,0 +1,54 @@ +.. -*- coding: utf-8; mode: rst -*- +.. _V4L2-SDR-FMT-PCU20BE: + +****************************** +V4L2_SDR_FMT_PCU20BE ('PC20') +****************************** + +Planar complex unsigned 20-bit big endian IQ sample + +Description +=========== + +This format contains a sequence of complex number samples. Each complex +number consist of two parts called In-phase and Quadrature (IQ). Both I +and Q are represented as a 20 bit unsigned big endian number stored in +32 bit space. The remaining unused bits within the 32 bit space will be +padded with 0. I value starts first and Q value starts at an offset +equalling half of the buffer size (i.e.) offset = buffersize/2. Out of +the 20 bits, bit 19:2 (18 bit) is data and bit 1:0 (2 bit) can be any +value. + +**Byte Order.** +Each cell is one byte. + +.. flat-table:: + :header-rows: 1 + :stub-columns: 0 + + * - Offset: + - Byte B0 + - Byte B1 + - Byte B2 + - Byte B3 + * - start + 0: + - I'\ :sub:`0[19:12]` + - I'\ :sub:`0[11:4]` + - I'\ :sub:`0[3:0]; B2[3:0]=pad` + - pad + * - start + 4: + - I'\ :sub:`1[19:12]` + - I'\ :sub:`1[11:4]` + - I'\ :sub:`1[3:0]; B2[3:0]=pad` + - pad + * - ... + * - start + offset: + - Q'\ :sub:`0[19:12]` + - Q'\ :sub:`0[11:4]` + - Q'\ :sub:`0[3:0]; B2[3:0]=pad` + - pad + * - start + offset + 4: + - Q'\ :sub:`1[19:12]` + - Q'\ :sub:`1[11:4]` + - Q'\ :sub:`1[3:0]; B2[3:0]=pad` + - pad |