Re: [PATCH v7 05/13] media: hevc: Add decode params control
From: Ezequiel Garcia
Date: Mon Mar 29 2021 - 15:28:59 EST
On Mon, 2021-03-29 at 08:57 +0200, Benjamin Gaignard wrote:
> Add decode params control and it associated structure to regroup
> all the information that are needed to decode a reference frame as
> it is describe in ITU-T Rec. H.265 section "8.3.2 Decoding process
> for reference picture set".
>
> Adapt Cedrus driver to these changes.
>
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxxxxx>
Reviewed-by: Ezequiel Garcia <ezequiel@xxxxxxxxxxxxx>
> ---
> version 7:
> - rebased on top of media_tree/master branch
>
> version 6:
> - fix compilation errors
>
> .../media/v4l/ext-ctrls-codec.rst | 94 +++++++++++++++----
> .../media/v4l/vidioc-queryctrl.rst | 6 ++
> drivers/media/v4l2-core/v4l2-ctrls.c | 26 +++--
> drivers/staging/media/sunxi/cedrus/cedrus.c | 6 ++
> drivers/staging/media/sunxi/cedrus/cedrus.h | 1 +
> .../staging/media/sunxi/cedrus/cedrus_dec.c | 2 +
> .../staging/media/sunxi/cedrus/cedrus_h265.c | 12 ++-
> include/media/hevc-ctrls.h | 29 ++++--
> 8 files changed, 137 insertions(+), 39 deletions(-)
>
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index 92314aec655a..7552869687f7 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -3181,9 +3181,6 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
> * - __u8
> - ``pic_struct``
> -
> - * - __u8
> - - ``num_active_dpb_entries``
> - - The number of entries in ``dpb``.
> * - __u8
> - ``ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
> - The list of L0 reference elements as indices in the DPB.
> @@ -3191,22 +3188,8 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
> - ``ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
> - The list of L1 reference elements as indices in the DPB.
> * - __u8
> - - ``num_rps_poc_st_curr_before``
> - - The number of reference pictures in the short-term set that come before
> - the current frame.
> - * - __u8
> - - ``num_rps_poc_st_curr_after``
> - - The number of reference pictures in the short-term set that come after
> - the current frame.
> - * - __u8
> - - ``num_rps_poc_lt_curr``
> - - The number of reference pictures in the long-term set.
> - * - __u8
> - - ``padding[7]``
> + - ``padding``
> - Applications and drivers must set this to zero.
> - * - struct :c:type:`v4l2_hevc_dpb_entry`
> - - ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
> - - The decoded picture buffer, for meta-data about reference frames.
> * - struct :c:type:`v4l2_hevc_pred_weight_table`
> - ``pred_weight_table``
> - The prediction weight coefficients for inter-picture prediction.
> @@ -3441,3 +3424,78 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
> so this has to come from client.
> This is applicable to H264 and valid Range is from 0 to 63.
> Source Rec. ITU-T H.264 (06/2019); G.7.4.1.1, G.8.8.1.
> +
> +``V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS (struct)``
> + Specifies various decode parameters, especially the references picture order
> + count (POC) for all the lists (short, long, before, current, after) and the
> + number of entries for each of them.
> + These parameters are defined according to :ref:`hevc`.
> + They are described in section 8.3 "Slice decoding process" of the
> + specification.
> +
> +.. c:type:: v4l2_ctrl_hevc_decode_params
> +
> +.. cssclass:: longtable
> +
> +.. flat-table:: struct v4l2_ctrl_hevc_decode_params
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - __s32
> + - ``pic_order_cnt_val``
> + - PicOrderCntVal as described in section 8.3.1 "Decoding process
> + for picture order count" of the specification.
> + * - __u8
> + - ``num_active_dpb_entries``
> + - The number of entries in ``dpb``.
> + * - struct :c:type:`v4l2_hevc_dpb_entry`
> + - ``dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
> + - The decoded picture buffer, for meta-data about reference frames.
> + * - __u8
> + - ``num_poc_st_curr_before``
> + - The number of reference pictures in the short-term set that come before
> + the current frame.
> + * - __u8
> + - ``num_poc_st_curr_after``
> + - The number of reference pictures in the short-term set that come after
> + the current frame.
> + * - __u8
> + - ``num_poc_lt_curr``
> + - The number of reference pictures in the long-term set.
> + * - __u8
> + - ``poc_st_curr_before[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
> + - PocStCurrBefore as described in section 8.3.2 "Decoding process for reference
> + picture set.
> + * - __u8
> + - ``poc_st_curr_after[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
> + - PocStCurrAfter as described in section 8.3.2 "Decoding process for reference
> + picture set.
> + * - __u8
> + - ``poc_lt_curr[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
> + - PocLtCurr as described in section 8.3.2 "Decoding process for reference
> + picture set.
> + * - __u64
> + - ``flags``
> + - See :ref:`Decode Parameters Flags <hevc_decode_params_flags>`
> +
> +.. _hevc_decode_params_flags:
> +
> +``Decode Parameters Flags``
> +
> +.. cssclass:: longtable
> +
> +.. flat-table::
> + :header-rows: 0
> + :stub-columns: 0
> + :widths: 1 1 2
> +
> + * - ``V4L2_HEVC_DECODE_PARAM_FLAG_IRAP_PIC``
> + - 0x00000001
> + -
> + * - ``V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC``
> + - 0x00000002
> + -
> + * - ``V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR``
> + - 0x00000004
> + -
> diff --git a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
> index 8a285daedc6a..cf8f94693c39 100644
> --- a/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
> +++ b/Documentation/userspace-api/media/v4l/vidioc-queryctrl.rst
> @@ -495,6 +495,12 @@ See also the examples in :ref:`control`.
> - n/a
> - A struct :c:type:`v4l2_ctrl_vp8_frame`, containing VP8
> frame parameters for stateless video decoders.
> + * - ``V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS``
> + - n/a
> + - n/a
> + - n/a
> + - A struct :c:type:`v4l2_ctrl_hevc_decode_params`, containing HEVC
> + decoding parameters for stateless video decoders.
>
> .. raw:: latex
>
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index 39038c6ad8fb..8c1a98ed4ca4 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -1037,6 +1037,7 @@ const char *v4l2_ctrl_get_name(u32 id)
> case V4L2_CID_MPEG_VIDEO_HEVC_SPS: return "HEVC Sequence Parameter Set";
> case V4L2_CID_MPEG_VIDEO_HEVC_PPS: return "HEVC Picture Parameter Set";
> case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS: return "HEVC Slice Parameters";
> + case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS: return "HEVC Decode Parameters";
> case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE: return "HEVC Decode Mode";
> case V4L2_CID_MPEG_VIDEO_HEVC_START_CODE: return "HEVC Start Code";
>
> @@ -1496,6 +1497,9 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
> case V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS:
> *type = V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS;
> break;
> + case V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS:
> + *type = V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS;
> + break;
> case V4L2_CID_UNIT_CELL_SIZE:
> *type = V4L2_CTRL_TYPE_AREA;
> *flags |= V4L2_CTRL_FLAG_READ_ONLY;
> @@ -1852,6 +1856,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
> struct v4l2_ctrl_hevc_sps *p_hevc_sps;
> struct v4l2_ctrl_hevc_pps *p_hevc_pps;
> struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
> + struct v4l2_ctrl_hevc_decode_params *p_hevc_decode_params;
> struct v4l2_area *area;
> void *p = ptr.p + idx * ctrl->elem_size;
> unsigned int i;
> @@ -2127,23 +2132,27 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
> zero_padding(*p_hevc_pps);
> break;
>
> - case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
> - p_hevc_slice_params = p;
> + case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
> + p_hevc_decode_params = p;
>
> - if (p_hevc_slice_params->num_active_dpb_entries >
> + if (p_hevc_decode_params->num_active_dpb_entries >
> V4L2_HEVC_DPB_ENTRIES_NUM_MAX)
> return -EINVAL;
>
> - zero_padding(p_hevc_slice_params->pred_weight_table);
> -
> - for (i = 0; i < p_hevc_slice_params->num_active_dpb_entries;
> + for (i = 0; i < p_hevc_decode_params->num_active_dpb_entries;
> i++) {
> struct v4l2_hevc_dpb_entry *dpb_entry =
> - &p_hevc_slice_params->dpb[i];
> + &p_hevc_decode_params->dpb[i];
>
> zero_padding(*dpb_entry);
> }
>
> + break;
> +
> + case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
> + p_hevc_slice_params = p;
> +
> + zero_padding(p_hevc_slice_params->pred_weight_table);
> zero_padding(*p_hevc_slice_params);
> break;
>
> @@ -2840,6 +2849,9 @@ static struct v4l2_ctrl *v4l2_ctrl_new(struct v4l2_ctrl_handler *hdl,
> case V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS:
> elem_size = sizeof(struct v4l2_ctrl_hevc_slice_params);
> break;
> + case V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS:
> + elem_size = sizeof(struct v4l2_ctrl_hevc_decode_params);
> + break;
> case V4L2_CTRL_TYPE_AREA:
> elem_size = sizeof(struct v4l2_area);
> break;
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.c b/drivers/staging/media/sunxi/cedrus/cedrus.c
> index 92812d1a39d4..6f095ae53818 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.c
> @@ -151,6 +151,12 @@ static const struct cedrus_control cedrus_controls[] = {
> },
> .codec = CEDRUS_CODEC_VP8,
> },
> + {
> + .cfg = {
> + .id = V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS,
> + },
> + .codec = CEDRUS_CODEC_H265,
> + },
> };
>
> #define CEDRUS_CONTROLS_COUNT ARRAY_SIZE(cedrus_controls)
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus.h b/drivers/staging/media/sunxi/cedrus/cedrus.h
> index 15f147dad4cb..930922bd4e46 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus.h
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus.h
> @@ -76,6 +76,7 @@ struct cedrus_h265_run {
> const struct v4l2_ctrl_hevc_sps *sps;
> const struct v4l2_ctrl_hevc_pps *pps;
> const struct v4l2_ctrl_hevc_slice_params *slice_params;
> + const struct v4l2_ctrl_hevc_decode_params *decode_params;
> };
>
> struct cedrus_vp8_run {
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> index d696b3ec70c0..8a7e44f92812 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_dec.c
> @@ -68,6 +68,8 @@ void cedrus_device_run(void *priv)
> V4L2_CID_MPEG_VIDEO_HEVC_PPS);
> run.h265.slice_params = cedrus_find_control_data(ctx,
> V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS);
> + run.h265.decode_params = cedrus_find_control_data(ctx,
> + V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS);
> break;
>
> case V4L2_PIX_FMT_VP8_FRAME:
> diff --git a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
> index ce497d0197df..397a4ba5df4c 100644
> --- a/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
> +++ b/drivers/staging/media/sunxi/cedrus/cedrus_h265.c
> @@ -245,6 +245,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
> const struct v4l2_ctrl_hevc_sps *sps;
> const struct v4l2_ctrl_hevc_pps *pps;
> const struct v4l2_ctrl_hevc_slice_params *slice_params;
> + const struct v4l2_ctrl_hevc_decode_params *decode_params;
> const struct v4l2_hevc_pred_weight_table *pred_weight_table;
> dma_addr_t src_buf_addr;
> dma_addr_t src_buf_end_addr;
> @@ -256,6 +257,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
> sps = run->h265.sps;
> pps = run->h265.pps;
> slice_params = run->h265.slice_params;
> + decode_params = run->h265.decode_params;
> pred_weight_table = &slice_params->pred_weight_table;
>
> /* MV column buffer size and allocation. */
> @@ -487,7 +489,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
>
> reg = VE_DEC_H265_DEC_SLICE_HDR_INFO1_SLICE_TC_OFFSET_DIV2(slice_params->slice_tc_offset_div2) |
> VE_DEC_H265_DEC_SLICE_HDR_INFO1_SLICE_BETA_OFFSET_DIV2(slice_params->slice_beta_offset_div2) |
> - VE_DEC_H265_DEC_SLICE_HDR_INFO1_SLICE_POC_BIGEST_IN_RPS_ST(slice_params->num_rps_poc_st_curr_after == 0) |
> + VE_DEC_H265_DEC_SLICE_HDR_INFO1_SLICE_POC_BIGEST_IN_RPS_ST(decode_params->num_poc_st_curr_after == 0) |
> VE_DEC_H265_DEC_SLICE_HDR_INFO1_SLICE_CR_QP_OFFSET(slice_params->slice_cr_qp_offset) |
> VE_DEC_H265_DEC_SLICE_HDR_INFO1_SLICE_CB_QP_OFFSET(slice_params->slice_cb_qp_offset) |
> VE_DEC_H265_DEC_SLICE_HDR_INFO1_SLICE_QP_DELTA(slice_params->slice_qp_delta);
> @@ -527,8 +529,8 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
> cedrus_write(dev, VE_DEC_H265_NEIGHBOR_INFO_ADDR, reg);
>
> /* Write decoded picture buffer in pic list. */
> - cedrus_h265_frame_info_write_dpb(ctx, slice_params->dpb,
> - slice_params->num_active_dpb_entries);
> + cedrus_h265_frame_info_write_dpb(ctx, decode_params->dpb,
> + decode_params->num_active_dpb_entries);
>
> /* Output frame. */
>
> @@ -545,7 +547,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
>
> /* Reference picture list 0 (for P/B frames). */
> if (slice_params->slice_type != V4L2_HEVC_SLICE_TYPE_I) {
> - cedrus_h265_ref_pic_list_write(dev, slice_params->dpb,
> + cedrus_h265_ref_pic_list_write(dev, decode_params->dpb,
> slice_params->ref_idx_l0,
> slice_params->num_ref_idx_l0_active_minus1 + 1,
> VE_DEC_H265_SRAM_OFFSET_REF_PIC_LIST0);
> @@ -564,7 +566,7 @@ static void cedrus_h265_setup(struct cedrus_ctx *ctx,
>
> /* Reference picture list 1 (for B frames). */
> if (slice_params->slice_type == V4L2_HEVC_SLICE_TYPE_B) {
> - cedrus_h265_ref_pic_list_write(dev, slice_params->dpb,
> + cedrus_h265_ref_pic_list_write(dev, decode_params->dpb,
> slice_params->ref_idx_l1,
> slice_params->num_ref_idx_l1_active_minus1 + 1,
> VE_DEC_H265_SRAM_OFFSET_REF_PIC_LIST1);
> diff --git a/include/media/hevc-ctrls.h b/include/media/hevc-ctrls.h
> index 003f819ecb26..8e0109eea454 100644
> --- a/include/media/hevc-ctrls.h
> +++ b/include/media/hevc-ctrls.h
> @@ -19,6 +19,7 @@
> #define V4L2_CID_MPEG_VIDEO_HEVC_SPS (V4L2_CID_CODEC_BASE + 1008)
> #define V4L2_CID_MPEG_VIDEO_HEVC_PPS (V4L2_CID_CODEC_BASE + 1009)
> #define V4L2_CID_MPEG_VIDEO_HEVC_SLICE_PARAMS (V4L2_CID_CODEC_BASE + 1010)
> +#define V4L2_CID_MPEG_VIDEO_HEVC_DECODE_PARAMS (V4L2_CID_CODEC_BASE + 1012)
> #define V4L2_CID_MPEG_VIDEO_HEVC_DECODE_MODE (V4L2_CID_CODEC_BASE + 1015)
> #define V4L2_CID_MPEG_VIDEO_HEVC_START_CODE (V4L2_CID_CODEC_BASE + 1016)
>
> @@ -26,6 +27,7 @@
> #define V4L2_CTRL_TYPE_HEVC_SPS 0x0120
> #define V4L2_CTRL_TYPE_HEVC_PPS 0x0121
> #define V4L2_CTRL_TYPE_HEVC_SLICE_PARAMS 0x0122
> +#define V4L2_CTRL_TYPE_HEVC_DECODE_PARAMS 0x0124
>
> enum v4l2_mpeg_video_hevc_decode_mode {
> V4L2_MPEG_VIDEO_HEVC_DECODE_MODE_SLICE_BASED,
> @@ -194,18 +196,10 @@ struct v4l2_ctrl_hevc_slice_params {
> __u8 pic_struct;
>
> /* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
> - __u8 num_active_dpb_entries;
> __u8 ref_idx_l0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> __u8 ref_idx_l1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
>
> - __u8 num_rps_poc_st_curr_before;
> - __u8 num_rps_poc_st_curr_after;
> - __u8 num_rps_poc_lt_curr;
> -
> - __u8 padding;
> -
> - /* ISO/IEC 23008-2, ITU-T Rec. H.265: General slice segment header */
> - struct v4l2_hevc_dpb_entry dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> + __u8 padding[5];
>
> /* ISO/IEC 23008-2, ITU-T Rec. H.265: Weighted prediction parameter */
> struct v4l2_hevc_pred_weight_table pred_weight_table;
> @@ -213,4 +207,21 @@ struct v4l2_ctrl_hevc_slice_params {
> __u64 flags;
> };
>
> +#define V4L2_HEVC_DECODE_PARAM_FLAG_IRAP_PIC 0x1
> +#define V4L2_HEVC_DECODE_PARAM_FLAG_IDR_PIC 0x2
> +#define V4L2_HEVC_DECODE_PARAM_FLAG_NO_OUTPUT_OF_PRIOR 0x4
> +
> +struct v4l2_ctrl_hevc_decode_params {
> + __s32 pic_order_cnt_val;
> + __u8 num_active_dpb_entries;
> + struct v4l2_hevc_dpb_entry dpb[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> + __u8 num_poc_st_curr_before;
> + __u8 num_poc_st_curr_after;
> + __u8 num_poc_lt_curr;
> + __u8 poc_st_curr_before[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> + __u8 poc_st_curr_after[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> + __u8 poc_lt_curr[V4L2_HEVC_DPB_ENTRIES_NUM_MAX];
> + __u64 flags;
> +};
> +
> #endif