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media: hevc: Embedded indexes in RPS 

Reference Picture Set lists provide indices of short and long term
reference in DBP array.
Fix Hantro to not do a look up in DBP entries.
Make documentation more clear about it.

[hverkuil: fix typo in commit log]

Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
Reviewed-by: Ezequiel Garcia <ezequiel@vanguardiasur.com.ar>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
This commit is contained in:
Benjamin Gaignard 2022-01-07 16:54:55 +01:00 committed by Mauro Carvalho Chehab
parent 7a3b3dc3bb
commit d95a63daca
2 changed files with 9 additions and 22 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
View File

@ -3383,15 +3383,15 @@ enum v4l2_mpeg_video_hevc_size_of_length_field -
* - __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.
picture set": provides the index of the short term before references in DPB array.
* - __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.
picture set": provides the index of the short term after references in DPB array.
* - __u8
- ``poc_lt_curr[V4L2_HEVC_DPB_ENTRIES_NUM_MAX]``
- PocLtCurr as described in section 8.3.2 "Decoding process for reference
picture set.
picture set": provides the index of the long term references in DPB array.
* - __u64
- ``flags``
- See :ref:`Decode Parameters Flags <hevc_decode_params_flags>`

25
drivers/staging/media/hantro/hantro_g2_hevc_dec.c
View File

@ -255,24 +255,11 @@ static void set_params(struct hantro_ctx *ctx)
hantro_reg_write(vpu, &g2_apf_threshold, 8);
}
static int find_ref_pic_index(const struct v4l2_hevc_dpb_entry *dpb, int pic_order_cnt)
{
int i;
for (i = 0; i < V4L2_HEVC_DPB_ENTRIES_NUM_MAX; i++) {
if (dpb[i].pic_order_cnt[0] == pic_order_cnt)
return i;
}
return 0x0;
}
static void set_ref_pic_list(struct hantro_ctx *ctx)
{
const struct hantro_hevc_dec_ctrls *ctrls = &ctx->hevc_dec.ctrls;
struct hantro_dev *vpu = ctx->dev;
const struct v4l2_ctrl_hevc_decode_params *decode_params = ctrls->decode_params;
const struct v4l2_hevc_dpb_entry *dpb = decode_params->dpb;
u32 list0[V4L2_HEVC_DPB_ENTRIES_NUM_MAX] = {};
u32 list1[V4L2_HEVC_DPB_ENTRIES_NUM_MAX] = {};
static const struct hantro_reg ref_pic_regs0[] = {
@ -316,11 +303,11 @@ static void set_ref_pic_list(struct hantro_ctx *ctx)
/* List 0 contains: short term before, short term after and long term */
j = 0;
for (i = 0; i < decode_params->num_poc_st_curr_before && j < ARRAY_SIZE(list0); i++)
list0[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_before[i]);
list0[j++] = decode_params->poc_st_curr_before[i];
for (i = 0; i < decode_params->num_poc_st_curr_after && j < ARRAY_SIZE(list0); i++)
list0[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_after[i]);
list0[j++] = decode_params->poc_st_curr_after[i];
for (i = 0; i < decode_params->num_poc_lt_curr && j < ARRAY_SIZE(list0); i++)
list0[j++] = find_ref_pic_index(dpb, decode_params->poc_lt_curr[i]);
list0[j++] = decode_params->poc_lt_curr[i];
/* Fill the list, copying over and over */
i = 0;
@ -329,11 +316,11 @@ static void set_ref_pic_list(struct hantro_ctx *ctx)
j = 0;
for (i = 0; i < decode_params->num_poc_st_curr_after && j < ARRAY_SIZE(list1); i++)
list1[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_after[i]);
list1[j++] = decode_params->poc_st_curr_after[i];
for (i = 0; i < decode_params->num_poc_st_curr_before && j < ARRAY_SIZE(list1); i++)
list1[j++] = find_ref_pic_index(dpb, decode_params->poc_st_curr_before[i]);
list1[j++] = decode_params->poc_st_curr_before[i];
for (i = 0; i < decode_params->num_poc_lt_curr && j < ARRAY_SIZE(list1); i++)
list1[j++] = find_ref_pic_index(dpb, decode_params->poc_lt_curr[i]);
list1[j++] = decode_params->poc_lt_curr[i];
i = 0;
while (j < ARRAY_SIZE(list1))