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media: uapi: mpeg2: Remove V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS

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The Hantro and Cedrus drivers work in frame-mode,
meaning they expect all the slices in a picture (either frame
or field structure) to be passed in each OUTPUT buffer.

These two are the only V4L2 MPEG-2 stateless decoders currently
supported. Given the VA-API drivers also work per-frame,
coalescing all the MPEG-2 slices in a buffer before the decoding
operation, it makes sense to not expect slice-mode drivers and
therefore remove V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS.

This is done to avoid carrying an unused interface. If needed,
this control can be added without breaking backwards compatibility.
Note that this would mean introducing a enumerator control to
specify the decoding mode (see V4L2_CID_STATELESS_H264_DECODE_MODE).

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Co-developed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Jernej Skrabec <jernej.skrabec@siol.net>
Tested-by: Daniel Almeida <daniel.almeida@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
This commit is contained in:
Ezequiel Garcia 2021-04-29 16:48:15 +02:00 committed by Mauro Carvalho Chehab
parent 701a6a410c
commit 45f97ba1ce
14 changed files with 7 additions and 111 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

35
Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
View file

@ -1608,41 +1608,6 @@ enum v4l2_mpeg_video_h264_hierarchical_coding_type -
.. _v4l2-mpeg-mpeg2:
``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (struct)``
Specifies the slice parameters (as extracted from the bitstream) for the
associated MPEG-2 slice data. This includes the necessary parameters for
configuring a stateless hardware decoding pipeline for MPEG-2.
The bitstream parameters are defined according to :ref:`mpeg2part2`.
.. note::
This compound control is not yet part of the public kernel API and
it is expected to change.
.. c:type:: v4l2_ctrl_mpeg2_slice_params
.. tabularcolumns:: |p{5.6cm}|p{4.6cm}|p{7.1cm}|
.. cssclass:: longtable
.. flat-table:: struct v4l2_ctrl_mpeg2_slice_params
:header-rows: 0
:stub-columns: 0
:widths: 1 1 2
* - __u32
- ``bit_size``
- Size (in bits) of the current slice data.
* - __u32
- ``data_bit_offset``
- Offset (in bits) to the video data in the current slice data.
* - __u32
- ``quantiser_scale_code``
- Code used to determine the quantization scale to use for the IDCT.
* - __u8
- ``reserved``
- Applications and drivers must set this to zero.
``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE (struct)``
Specifies the sequence parameters (as extracted from the bitstream) for the
associated MPEG-2 slice data. This includes fields matching the syntax

6
Documentation/userspace-api/media/v4l/pixfmt-compressed.rst
View file

@ -114,9 +114,9 @@ Compressed Formats
This format is adapted for stateless video decoders that implement a
MPEG-2 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_MPEG2_SEQUENCE``,
``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE``, and ``V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS``
controls. Quantisation matrices can optionally be specified through the
through the ``V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE`` and
``V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE`` controls.
Quantisation matrices can optionally be specified through the
``V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION`` control.
See the :ref:`associated Codec Control IDs <v4l2-mpeg-mpeg2>`.
Exactly one output and one capture buffer must be provided for use with

6
Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
View file

@ -417,12 +417,6 @@ See also the examples in :ref:`control`.
- any
- An unsigned 32-bit valued control ranging from minimum to maximum
inclusive. The step value indicates the increment between values.
* - ``V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS``
- n/a
- n/a
- n/a
- A struct :c:type:`v4l2_ctrl_mpeg2_slice_params`, containing MPEG-2
slice parameters for stateless video decoders.
* - ``V4L2_CTRL_TYPE_MPEG2_QUANTISATION``
- n/a
- n/a

1
Documentation/userspace-api/media/videodev2.h.rst.exceptions
View file

@ -136,7 +136,6 @@ replace symbol V4L2_CTRL_TYPE_U32 :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_U8 :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_MPEG2_SEQUENCE :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_MPEG2_PICTURE :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_MPEG2_QUANTISATION :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_H264_SPS :c:type:`v4l2_ctrl_type`
replace symbol V4L2_CTRL_TYPE_H264_PPS :c:type:`v4l2_ctrl_type`

19
drivers/media/v4l2-core/v4l2-ctrls.c
View file

@ -979,7 +979,6 @@ const char *v4l2_ctrl_get_name(u32 id)
case V4L2_CID_MPEG_VIDEO_USE_LTR_FRAMES: return "Use LTR Frames";
case V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE: return "MPEG-2 Sequence Header";
case V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE: return "MPEG-2 Picture Header";
case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS: return "MPEG-2 Slice Parameters";
case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION: return "MPEG-2 Quantisation Matrices";
case V4L2_CID_FWHT_I_FRAME_QP: return "FWHT I-Frame QP Value";
case V4L2_CID_FWHT_P_FRAME_QP: return "FWHT P-Frame QP Value";
@ -1507,9 +1506,6 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
case V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE:
*type = V4L2_CTRL_TYPE_MPEG2_PICTURE;
break;
case V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS:
*type = V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS;
break;
case V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION:
*type = V4L2_CTRL_TYPE_MPEG2_QUANTISATION;
break;
@ -1723,11 +1719,6 @@ static void std_init_compound(const struct v4l2_ctrl *ctrl, u32 idx,
else
memset(p, 0, ctrl->elem_size);
/*
* The cast is needed to get rid of a gcc warning complaining that
* V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS is not part of the
* v4l2_ctrl_type enum.
*/
switch ((u32)ctrl->type) {
case V4L2_CTRL_TYPE_MPEG2_SEQUENCE:
p_mpeg2_sequence = p;
@ -1925,7 +1916,6 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
{
struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
struct v4l2_ctrl_vp8_frame *p_vp8_frame;
struct v4l2_ctrl_fwht_params *p_fwht_params;
struct v4l2_ctrl_h264_sps *p_h264_sps;
@ -1988,12 +1978,6 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
zero_reserved(*p_mpeg2_picture);
break;
case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
p_mpeg2_slice_params = p;
zero_reserved(*p_mpeg2_slice_params);
break;
case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
break;
@ -2966,9 +2950,6 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
case V4L2_CTRL_TYPE_MPEG2_PICTURE:
elem_size = sizeof(struct v4l2_ctrl_mpeg2_picture);
break;
case V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS:
elem_size = sizeof(struct v4l2_ctrl_mpeg2_slice_params);
break;
case V4L2_CTRL_TYPE_MPEG2_QUANTISATION:
elem_size = sizeof(struct v4l2_ctrl_mpeg2_quantisation);
break;

5
drivers/staging/media/hantro/hantro_drv.c
View file

@ -305,11 +305,6 @@ static const struct hantro_ctrl controls[] = {
.cfg = {
.id = V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE,
},
}, {
.codec = HANTRO_MPEG2_DECODER,
.cfg = {
.id = V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
},
}, {
.codec = HANTRO_MPEG2_DECODER,
.cfg = {

9
drivers/staging/media/hantro/hantro_g1_mpeg2_dec.c
View file

@ -93,8 +93,7 @@ hantro_g1_mpeg2_dec_set_buffers(struct hantro_dev *vpu, struct hantro_ctx *ctx,
struct vb2_buffer *src_buf,
struct vb2_buffer *dst_buf,
const struct v4l2_ctrl_mpeg2_sequence *seq,
const struct v4l2_ctrl_mpeg2_picture *pic,
const struct v4l2_ctrl_mpeg2_slice_params *slice_params)
const struct v4l2_ctrl_mpeg2_picture *pic)
{
dma_addr_t forward_addr = 0, backward_addr = 0;
dma_addr_t current_addr, addr;
@ -150,7 +149,6 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
{
struct hantro_dev *vpu = ctx->dev;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
const struct v4l2_ctrl_mpeg2_sequence *seq;
const struct v4l2_ctrl_mpeg2_picture *pic;
u32 reg;
@ -161,8 +159,6 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
/* Apply request controls if any */
hantro_start_prepare_run(ctx);
slice_params = hantro_get_ctrl(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS);
seq = hantro_get_ctrl(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
pic = hantro_get_ctrl(ctx,
@ -232,10 +228,9 @@ void hantro_g1_mpeg2_dec_run(struct hantro_ctx *ctx)
vdpu_write_relaxed(vpu, reg, G1_SWREG(55));
hantro_g1_mpeg2_dec_set_quantisation(vpu, ctx);
hantro_g1_mpeg2_dec_set_buffers(vpu, ctx, &src_buf->vb2_buf,
&dst_buf->vb2_buf,
seq, pic, slice_params);
seq, pic);
hantro_end_prepare_run(ctx);

8
drivers/staging/media/hantro/rk3399_vpu_hw_mpeg2_dec.c
View file

@ -96,8 +96,7 @@ rk3399_vpu_mpeg2_dec_set_buffers(struct hantro_dev *vpu,
struct vb2_buffer *src_buf,
struct vb2_buffer *dst_buf,
const struct v4l2_ctrl_mpeg2_sequence *seq,
const struct v4l2_ctrl_mpeg2_picture *pic,
const struct v4l2_ctrl_mpeg2_slice_params *slice_params)
const struct v4l2_ctrl_mpeg2_picture *pic)
{
dma_addr_t forward_addr = 0, backward_addr = 0;
dma_addr_t current_addr, addr;
@ -153,7 +152,6 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
{
struct hantro_dev *vpu = ctx->dev;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
const struct v4l2_ctrl_mpeg2_sequence *seq;
const struct v4l2_ctrl_mpeg2_picture *pic;
u32 reg;
@ -163,8 +161,6 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
hantro_start_prepare_run(ctx);
slice_params = hantro_get_ctrl(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS);
seq = hantro_get_ctrl(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
pic = hantro_get_ctrl(ctx,
@ -241,7 +237,7 @@ void rk3399_vpu_mpeg2_dec_run(struct hantro_ctx *ctx)
rk3399_vpu_mpeg2_dec_set_buffers(vpu, ctx, &src_buf->vb2_buf,
&dst_buf->vb2_buf,
seq, pic, slice_params);
seq, pic);
/* Kick the watchdog and start decoding */
hantro_end_prepare_run(ctx);

6
drivers/staging/media/sunxi/cedrus/cedrus.c
View file

@ -41,12 +41,6 @@ static const struct cedrus_control cedrus_controls[] = {
},
.codec = CEDRUS_CODEC_MPEG2,
},
{
.cfg = {
.id = V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS,
},
.codec = CEDRUS_CODEC_MPEG2,
},
{
.cfg = {
.id = V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION,

1
drivers/staging/media/sunxi/cedrus/cedrus.h
View file

@ -70,7 +70,6 @@ struct cedrus_h264_run {
struct cedrus_mpeg2_run {
const struct v4l2_ctrl_mpeg2_sequence *sequence;
const struct v4l2_ctrl_mpeg2_picture *picture;
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
const struct v4l2_ctrl_mpeg2_quantisation *quantisation;
};

2
drivers/staging/media/sunxi/cedrus/cedrus_dec.c
View file

@ -44,8 +44,6 @@ void cedrus_device_run(void *priv)
V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE);
run.mpeg2.picture = cedrus_find_control_data(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE);
run.mpeg2.slice_params = cedrus_find_control_data(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS);
run.mpeg2.quantisation = cedrus_find_control_data(ctx,
V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION);
break;

2
drivers/staging/media/sunxi/cedrus/cedrus_mpeg2.c
View file

@ -50,7 +50,6 @@ static void cedrus_mpeg2_irq_disable(struct cedrus_ctx *ctx)
static void cedrus_mpeg2_setup(struct cedrus_ctx *ctx, struct cedrus_run *run)
{
const struct v4l2_ctrl_mpeg2_slice_params *slice_params;
const struct v4l2_ctrl_mpeg2_sequence *seq;
const struct v4l2_ctrl_mpeg2_picture *pic;
const struct v4l2_ctrl_mpeg2_quantisation *quantisation;
@ -65,7 +64,6 @@ static void cedrus_mpeg2_setup(struct cedrus_ctx *ctx, struct cedrus_run *run)
unsigned int i;
u32 reg;
slice_params = run->mpeg2.slice_params;
seq = run->mpeg2.sequence;
pic = run->mpeg2.picture;

16
include/media/mpeg2-ctrls.h
View file

@ -11,13 +11,11 @@
#ifndef _MPEG2_CTRLS_H_
#define _MPEG2_CTRLS_H_
#define V4L2_CID_MPEG_VIDEO_MPEG2_SLICE_PARAMS (V4L2_CID_CODEC_BASE+250)
#define V4L2_CID_MPEG_VIDEO_MPEG2_QUANTISATION (V4L2_CID_CODEC_BASE+251)
#define V4L2_CID_MPEG_VIDEO_MPEG2_SEQUENCE (V4L2_CID_CODEC_BASE+252)
#define V4L2_CID_MPEG_VIDEO_MPEG2_PICTURE (V4L2_CID_CODEC_BASE+253)
/* enum v4l2_ctrl_type type values */
#define V4L2_CTRL_TYPE_MPEG2_SLICE_PARAMS 0x0130
#define V4L2_CTRL_TYPE_MPEG2_QUANTISATION 0x0131
#define V4L2_CTRL_TYPE_MPEG2_SEQUENCE 0x0132
#define V4L2_CTRL_TYPE_MPEG2_PICTURE 0x0133
@ -101,20 +99,6 @@ struct v4l2_ctrl_mpeg2_picture {
__u8 reserved[5];
};
/**
* struct v4l2_ctrl_mpeg2_slice_params - MPEG-2 slice header
*
* @quantiser_scale_code: quantiser scale integer matching an
* homonymous syntax element.
* @reserved: padding field. Should be zeroed by applications.
*/
struct v4l2_ctrl_mpeg2_slice_params {
__u32 bit_size;
__u32 data_bit_offset;
__u32 quantiser_scale_code;
__u32 reserved;
};
/**
* struct v4l2_ctrl_mpeg2_quantisation - MPEG-2 quantisation
*

2
include/media/v4l2-ctrls.h
View file

@ -42,7 +42,6 @@ struct video_device;
* @p_char: Pointer to a string.
* @p_mpeg2_sequence: Pointer to a MPEG2 sequence structure.
* @p_mpeg2_picture: Pointer to a MPEG2 picture structure.
* @p_mpeg2_slice_params: Pointer to a MPEG2 slice parameters structure.
* @p_mpeg2_quantisation: Pointer to a MPEG2 quantisation data structure.
* @p_fwht_params: Pointer to a FWHT stateless parameters structure.
* @p_h264_sps: Pointer to a struct v4l2_ctrl_h264_sps.
@ -70,7 +69,6 @@ union v4l2_ctrl_ptr {
char *p_char;
struct v4l2_ctrl_mpeg2_sequence *p_mpeg2_sequence;
struct v4l2_ctrl_mpeg2_picture *p_mpeg2_picture;
struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
struct v4l2_ctrl_mpeg2_quantisation *p_mpeg2_quantisation;
struct v4l2_ctrl_fwht_params *p_fwht_params;
struct v4l2_ctrl_h264_sps *p_h264_sps;