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Subject[PATCH v9 05/13] media: hevc: Add decode params control
Date
Add decode params control and the associated structure to group
all the information that are needed to decode a reference frame as
is described 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@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@collabora.com>
---
version 9:
- Corrections in commit message

version 8:
- add Ezequiel review tag

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 | 28 ++++--
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, 138 insertions(+), 40 deletions(-)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index aabcb0e63a5e..7b90cb939e9d 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -3214,9 +3214,6 @@ 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.
@@ -3224,22 +3221,8 @@ 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.
@@ -3492,3 +3475,78 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
encoding the next frame queued after setting this control.
This provides a bitmask which consists of bits [0, LTR_COUNT-1].
This is applicable to the H264 and HEVC encoders.
+
+``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 c7bcc5c25771..9c918766e2c8 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -1041,6 +1041,7 @@ 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";

@@ -1526,6 +1527,9 @@ 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;
@@ -1895,6 +1899,7 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
struct v4l2_ctrl_hevc_pps *p_hevc_pps;
struct v4l2_ctrl_hevc_slice_params *p_hevc_slice_params;
struct v4l2_ctrl_hdr10_mastering_display *p_hdr10_mastering;
+ 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;
@@ -2170,24 +2175,21 @@ 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);
}

- zero_padding(*p_hevc_slice_params);
break;

case V4L2_CTRL_TYPE_HDR10_CLL_INFO:
@@ -2237,6 +2239,13 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,

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;
+
case V4L2_CTRL_TYPE_AREA:
area = p;
if (!area->width || !area->height)
@@ -2938,6 +2947,9 @@ 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_HDR10_CLL_INFO:
elem_size = sizeof(struct v4l2_ctrl_hdr10_cll_info);
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
--
2.25.1
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