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media: uapi: Add VP8 stateless decoder API

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Add the parsed VP8 frame pixel format and controls, to be used
with the new stateless decoder API for VP8 to provide parameters
for accelerator (aka stateless) codecs.

Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Pawel Osciak <posciak@chromium.org>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Pawel Osciak 2019-07-11 16:26:42 -04:00 committed by Mauro Carvalho Chehab
parent de8145452e
commit a57d6acaf3
7 changed files with 477 additions and 0 deletions
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10
Documentation/media/uapi/v4l/biblio.rst
View File

@ -395,3 +395,13 @@ colimg
:title: Color Imaging: Fundamentals and Applications
:author: Erik Reinhard et al.
.. _vp8:
VP8
===
:title: RFC 6386: "VP8 Data Format and Decoding Guide"
:author: J. Bankoski et al.

323
Documentation/media/uapi/v4l/ext-ctrls-codec.rst
View File

@ -2234,6 +2234,329 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
Quantization parameter for a P frame for FWHT. Valid range: from 1
to 31.
.. _v4l2-mpeg-vp8:
``V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER (struct)``
Specifies the frame parameters for the associated VP8 parsed frame data.
This includes the necessary parameters for
configuring a stateless hardware decoding pipeline for VP8.
The bitstream parameters are defined according to :ref:`vp8`.
.. note::
This compound control is not yet part of the public kernel API and
it is expected to change.
.. c:type:: v4l2_ctrl_vp8_frame_header
.. cssclass:: longtable
.. tabularcolumns:: |p{5.8cm}|p{4.8cm}|p{6.6cm}|
.. flat-table:: struct v4l2_ctrl_vp8_frame_header
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - struct :c:type:`v4l2_vp8_segment_header`
- ``segment_header``
- Structure with segment-based adjustments metadata.
* - struct :c:type:`v4l2_vp8_loopfilter_header`
- ``loopfilter_header``
- Structure with loop filter level adjustments metadata.
* - struct :c:type:`v4l2_vp8_quantization_header`
- ``quant_header``
- Structure with VP8 dequantization indices metadata.
* - struct :c:type:`v4l2_vp8_entropy_header`
- ``entropy_header``
- Structure with VP8 entropy coder probabilities metadata.
* - struct :c:type:`v4l2_vp8_entropy_coder_state`
- ``coder_state``
- Structure with VP8 entropy coder state.
* - __u16
- ``width``
- The width of the frame. Must be set for all frames.
* - __u16
- ``height``
- The height of the frame. Must be set for all frames.
* - __u8
- ``horizontal_scale``
- Horizontal scaling factor.
* - __u8
- ``vertical_scaling factor``
- Vertical scale.
* - __u8
- ``version``
- Bitstream version.
* - __u8
- ``prob_skip_false``
- Indicates the probability that the macroblock is not skipped.
* - __u8
- ``prob_intra``
- Indicates the probability that a macroblock is intra-predicted.
* - __u8
- ``prob_last``
- Indicates the probability that the last reference frame is used
for inter-prediction
* - __u8
- ``prob_gf``
- Indicates the probability that the golden reference frame is used
for inter-prediction
* - __u8
- ``num_dct_parts``
- Number of DCT coefficients partitions. Must be one of: 1, 2, 4, or 8.
* - __u32
- ``first_part_size``
- Size of the first partition, i.e. the control partition.
* - __u32
- ``first_part_header_bits``
- Size in bits of the first partition header portion.
* - __u32
- ``dct_part_sizes[8]``
- DCT coefficients sizes.
* - __u64
- ``last_frame_ts``
- Timestamp for the V4L2 capture buffer to use as last reference frame, used
with inter-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``golden_frame_ts``
- Timestamp for the V4L2 capture buffer to use as last reference frame, used
with inter-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``alt_frame_ts``
- Timestamp for the V4L2 capture buffer to use as alternate reference frame, used
with inter-coded frames. The timestamp refers to the ``timestamp`` field in
struct :c:type:`v4l2_buffer`. Use the :c:func:`v4l2_timeval_to_ns()`
function to convert the struct :c:type:`timeval` in struct
:c:type:`v4l2_buffer` to a __u64.
* - __u64
- ``flags``
- See :ref:`Frame Header Flags <vp8_frame_header_flags>`
.. _vp8_frame_header_flags:
``Frame Header Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP8_FRAME_HEADER_FLAG_KEY_FRAME``
- 0x01
- Indicates if the frame is a key frame.
* - ``V4L2_VP8_FRAME_HEADER_FLAG_EXPERIMENTAL``
- 0x02
- Experimental bitstream.
* - ``V4L2_VP8_FRAME_HEADER_FLAG_SHOW_FRAME``
- 0x04
- Show frame flag, indicates if the frame is for display.
* - ``V4L2_VP8_FRAME_HEADER_FLAG_MB_NO_SKIP_COEFF``
- 0x08
- Enable/disable skipping of macroblocks with no non-zero coefficients.
* - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_GOLDEN``
- 0x10
- Sign of motion vectors when the golden frame is referenced.
* - ``V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_ALT``
- 0x20
- Sign of motion vectors when the alt frame is referenced.
.. c:type:: v4l2_vp8_entropy_coder_state
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
.. flat-table:: struct v4l2_vp8_entropy_coder_state
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``range``
-
* - __u8
- ``value``
-
* - __u8
- ``bit_count``
-
* - __u8
- ``padding``
- Applications and drivers must set this to zero.
.. c:type:: v4l2_vp8_segment_header
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
.. flat-table:: struct v4l2_vp8_segment_header
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s8
- ``quant_update[4]``
- Signed quantizer value update.
* - __s8
- ``lf_update[4]``
- Signed loop filter level value update.
* - __u8
- ``segment_probs[3]``
- Segment probabilities.
* - __u8
- ``padding``
- Applications and drivers must set this to zero.
* - __u32
- ``flags``
- See :ref:`Segment Header Flags <vp8_segment_header_flags>`
.. _vp8_segment_header_flags:
``Segment Header Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_ENABLED``
- 0x01
- Enable/disable segment-based adjustments.
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_MAP``
- 0x02
- Indicates if the macroblock segmentation map is updated in this frame.
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_FEATURE_DATA``
- 0x04
- Indicates if the segment feature data is updated in this frame.
* - ``V4L2_VP8_SEGMENT_HEADER_FLAG_DELTA_VALUE_MODE``
- 0x08
- If is set, the segment feature data mode is delta-value.
If cleared, it's absolute-value.
.. c:type:: v4l2_vp8_loopfilter_header
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
.. flat-table:: struct v4l2_vp8_loopfilter_header
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __s8
- ``ref_frm_delta[4]``
- Reference adjustment (signed) delta value.
* - __s8
- ``mb_mode_delta[4]``
- Macroblock prediction mode adjustment (signed) delta value.
* - __u8
- ``sharpness_level``
- Sharpness level
* - __u8
- ``level``
- Filter level
* - __u16
- ``padding``
- Applications and drivers must set this to zero.
* - __u32
- ``flags``
- See :ref:`Loopfilter Header Flags <vp8_loopfilter_header_flags>`
.. _vp8_loopfilter_header_flags:
``Loopfilter Header Flags``
.. cssclass:: longtable
.. flat-table::
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - ``V4L2_VP8_LF_HEADER_ADJ_ENABLE``
- 0x01
- Enable/disable macroblock-level loop filter adjustment.
* - ``V4L2_VP8_LF_HEADER_DELTA_UPDATE``
- 0x02
- Indicates if the delta values used in an adjustment are updated.
* - ``V4L2_VP8_LF_FILTER_TYPE_SIMPLE``
- 0x04
- If set, indicates the filter type is simple.
If cleared, the filter type is normal.
.. c:type:: v4l2_vp8_quantization_header
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
.. flat-table:: struct v4l2_vp8_quantization_header
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``y_ac_qi``
- Luma AC coefficient table index.
* - __s8
- ``y_dc_delta``
- Luma DC delta vaue.
* - __s8
- ``y2_dc_delta``
- Y2 block DC delta value.
* - __s8
- ``y2_ac_delta``
- Y2 block AC delta value.
* - __s8
- ``uv_dc_delta``
- Chroma DC delta value.
* - __s8
- ``uv_ac_delta``
- Chroma AC delta value.
* - __u16
- ``padding``
- Applications and drivers must set this to zero.
.. c:type:: v4l2_vp8_entropy_header
.. cssclass:: longtable
.. tabularcolumns:: |p{1.5cm}|p{6.3cm}|p{9.4cm}|
.. flat-table:: struct v4l2_vp8_entropy_header
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u8
- ``coeff_probs[4][8][3][11]``
- Coefficient update probabilities.
* - __u8
- ``y_mode_probs[4]``
- Luma mode update probabilities.
* - __u8
- ``uv_mode_probs[3]``
- Chroma mode update probabilities.
* - __u8
- ``mv_probs[2][19]``
- MV decoding update probabilities.
* - __u8
- ``padding[3]``
- Applications and drivers must set this to zero.
.. raw:: latex
\normalsize

20
Documentation/media/uapi/v4l/pixfmt-compressed.rst
View File

@ -133,6 +133,26 @@ Compressed Formats
- ``V4L2_PIX_FMT_VP8``
- 'VP80'
- VP8 video elementary stream.
* .. _V4L2-PIX-FMT-VP8-FRAME:
- ``V4L2_PIX_FMT_VP8_FRAME``
- 'VP8F'
- VP8 parsed frame, as extracted from the container.
This format is adapted for stateless video decoders that implement a
VP8 pipeline (using the :ref:`mem2mem` and :ref:`media-request-api`).
Metadata associated with the frame to decode is required to be passed
through the ``V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER`` control.
See the :ref:`associated Codec Control IDs <v4l2-mpeg-vp8>`.
Exactly one output and one capture buffer must be provided for use with
this pixel format. The output buffer must contain the appropriate number
of macroblocks to decode a full corresponding frame to the matching
capture buffer.
.. note::
This format is not yet part of the public kernel API and it
is expected to change.
* .. _V4L2-PIX-FMT-VP9:
- ``V4L2_PIX_FMT_VP9``

10
drivers/media/v4l2-core/v4l2-ctrls.c
View File

@ -885,6 +885,7 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_VPX_P_FRAME_QP: return "VPX P-Frame QP Value";
case V4L2_CID_MPEG_VIDEO_VP8_PROFILE: return "VP8 Profile";
case V4L2_CID_MPEG_VIDEO_VP9_PROFILE: return "VP9 Profile";
case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER: return "VP8 Frame Header";
/* HEVC controls */
case V4L2_CID_MPEG_VIDEO_HEVC_I_FRAME_QP: return "HEVC I-Frame QP Value";
@ -1345,6 +1346,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_MPEG_VIDEO_H264_DECODE_PARAMS:
*type = V4L2_CTRL_TYPE_H264_DECODE_PARAMS;
break;
case V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER:
*type = V4L2_CTRL_TYPE_VP8_FRAME_HEADER;
break;
default:
*type = V4L2_CTRL_TYPE_INTEGER;
break;
@ -1690,6 +1694,9 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
break;
case V4L2_CTRL_TYPE_VP8_FRAME_HEADER:
break;
default:
return -EINVAL;
}
@ -2360,6 +2367,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
elem_size = sizeof(struct v4l2_ctrl_h264_decode_params);
break;
case V4L2_CTRL_TYPE_VP8_FRAME_HEADER:
elem_size = sizeof(struct v4l2_ctrl_vp8_frame_header);
break;
default:
if (type < V4L2_CTRL_COMPOUND_TYPES)
elem_size = sizeof(s32);

1
drivers/media/v4l2-core/v4l2-ioctl.c
View File

@ -1348,6 +1348,7 @@ static void v4l_fill_fmtdesc(struct v4l2_fmtdesc *fmt)
case V4L2_PIX_FMT_VC1_ANNEX_G: descr = "VC-1 (SMPTE 412M Annex G)"; break;
case V4L2_PIX_FMT_VC1_ANNEX_L: descr = "VC-1 (SMPTE 412M Annex L)"; break;
case V4L2_PIX_FMT_VP8: descr = "VP8"; break;
case V4L2_PIX_FMT_VP8_FRAME: descr = "VP8 Frame"; break;
case V4L2_PIX_FMT_VP9: descr = "VP9"; break;
case V4L2_PIX_FMT_HEVC: descr = "HEVC"; break; /* aka H.265 */
case V4L2_PIX_FMT_FWHT: descr = "FWHT"; break; /* used in vicodec */

3
include/media/v4l2-ctrls.h
View File

@ -20,6 +20,7 @@
#include <media/mpeg2-ctrls.h>
#include <media/fwht-ctrls.h>
#include <media/h264-ctrls.h>
#include <media/vp8-ctrls.h>
/* forward references */
struct file;
@ -48,6 +49,7 @@ struct poll_table_struct;
* @p_h264_scaling_matrix: Pointer to a struct v4l2_ctrl_h264_scaling_matrix.
* @p_h264_slice_params: Pointer to a struct v4l2_ctrl_h264_slice_params.
* @p_h264_decode_params: Pointer to a struct v4l2_ctrl_h264_decode_params.
* @p_vp8_frame_header: Pointer to a VP8 frame header structure.
* @p: Pointer to a compound value.
*/
union v4l2_ctrl_ptr {
@ -65,6 +67,7 @@ union v4l2_ctrl_ptr {
struct v4l2_ctrl_h264_scaling_matrix *p_h264_scaling_matrix;
struct v4l2_ctrl_h264_slice_params *p_h264_slice_params;
struct v4l2_ctrl_h264_decode_params *p_h264_decode_params;
struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header;
void *p;
};

110
include/media/vp8-ctrls.h Normal file
View File

@ -0,0 +1,110 @@
/* SPDX-License-Identifier: GPL-2.0 */
/*
* These are the VP8 state controls for use with stateless VP8
* codec drivers.
*
* It turns out that these structs are not stable yet and will undergo
* more changes. So keep them private until they are stable and ready to
* become part of the official public API.
*/
#ifndef _VP8_CTRLS_H_
#define _VP8_CTRLS_H_
#define V4L2_PIX_FMT_VP8_FRAME v4l2_fourcc('V', 'P', '8', 'F')
#define V4L2_CID_MPEG_VIDEO_VP8_FRAME_HEADER (V4L2_CID_MPEG_BASE + 2000)
#define V4L2_CTRL_TYPE_VP8_FRAME_HEADER 0x301
#define V4L2_VP8_SEGMENT_HEADER_FLAG_ENABLED 0x01
#define V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_MAP 0x02
#define V4L2_VP8_SEGMENT_HEADER_FLAG_UPDATE_FEATURE_DATA 0x04
#define V4L2_VP8_SEGMENT_HEADER_FLAG_DELTA_VALUE_MODE 0x08
struct v4l2_vp8_segment_header {
__s8 quant_update[4];
__s8 lf_update[4];
__u8 segment_probs[3];
__u8 padding;
__u32 flags;
};
#define V4L2_VP8_LF_HEADER_ADJ_ENABLE 0x01
#define V4L2_VP8_LF_HEADER_DELTA_UPDATE 0x02
#define V4L2_VP8_LF_FILTER_TYPE_SIMPLE 0x04
struct v4l2_vp8_loopfilter_header {
__s8 ref_frm_delta[4];
__s8 mb_mode_delta[4];
__u8 sharpness_level;
__u8 level;
__u16 padding;
__u32 flags;
};
struct v4l2_vp8_quantization_header {
__u8 y_ac_qi;
__s8 y_dc_delta;
__s8 y2_dc_delta;
__s8 y2_ac_delta;
__s8 uv_dc_delta;
__s8 uv_ac_delta;
__u16 padding;
};
struct v4l2_vp8_entropy_header {
__u8 coeff_probs[4][8][3][11];
__u8 y_mode_probs[4];
__u8 uv_mode_probs[3];
__u8 mv_probs[2][19];
__u8 padding[3];
};
struct v4l2_vp8_entropy_coder_state {
__u8 range;
__u8 value;
__u8 bit_count;
__u8 padding;
};
#define V4L2_VP8_FRAME_HEADER_FLAG_KEY_FRAME 0x01
#define V4L2_VP8_FRAME_HEADER_FLAG_EXPERIMENTAL 0x02
#define V4L2_VP8_FRAME_HEADER_FLAG_SHOW_FRAME 0x04
#define V4L2_VP8_FRAME_HEADER_FLAG_MB_NO_SKIP_COEFF 0x08
#define V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_GOLDEN 0x10
#define V4L2_VP8_FRAME_HEADER_FLAG_SIGN_BIAS_ALT 0x20
#define VP8_FRAME_IS_KEY_FRAME(hdr) \
(!!((hdr)->flags & V4L2_VP8_FRAME_HEADER_FLAG_KEY_FRAME))
struct v4l2_ctrl_vp8_frame_header {
struct v4l2_vp8_segment_header segment_header;
struct v4l2_vp8_loopfilter_header lf_header;
struct v4l2_vp8_quantization_header quant_header;
struct v4l2_vp8_entropy_header entropy_header;
struct v4l2_vp8_entropy_coder_state coder_state;
__u16 width;
__u16 height;
__u8 horizontal_scale;
__u8 vertical_scale;
__u8 version;
__u8 prob_skip_false;
__u8 prob_intra;
__u8 prob_last;
__u8 prob_gf;
__u8 num_dct_parts;
__u32 first_part_size;
__u32 first_part_header_bits;
__u32 dct_part_sizes[8];
__u64 last_frame_ts;
__u64 golden_frame_ts;
__u64 alt_frame_ts;
__u64 flags;
};
#endif