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| author |   Boris Brezillon <boris.brezillon@collabora.com> | 2020-04-04 00:13:41 +0200 |
|---|---|---|
| committer |   Mauro Carvalho Chehab <mchehab+huawei@kernel.org> | 2020-04-21 13:46:40 +0200 |
| commit | 624922a2739b96b83aaf1655d0519b41d30140f7 (patch) | |
| tree | 20159722c44c060221f94cc179adbd828dc0170a /include/media/h264-ctrls.h | |
| parent | media: rkisp1: Fix wrong PHY config dependency (diff) | |
| download | wireguard-linux-624922a2739b96b83aaf1655d0519b41d30140f7.tar.xz wireguard-linux-624922a2739b96b83aaf1655d0519b41d30140f7.zip | |
media: v4l2-core: Add helpers to build the H264 P/B0/B1 reflists
Building those list is a standard procedure described in section
'8.2.4 Decoding process for reference picture lists construction' of
the H264 specification.
We already have 2 drivers needing the same logic (hantro and rkvdec) and
I suspect we will soon have more.
Let's provide generic helpers to create those lists.
Signed-off-by: Boris Brezillon <boris.brezillon@collabora.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Diffstat (limited to 'include/media/h264-ctrls.h')
| -rw-r--r-- | include/media/h264-ctrls.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/include/media/h264-ctrls.h b/include/media/h264-ctrls.h index 1c6ff7d63bca..080fd1293c42 100644 --- a/include/media/h264-ctrls.h +++ b/include/media/h264-ctrls.h @@ -13,6 +13,12 @@ #include <linux/videodev2.h> +/* + * Maximum DPB size, as specified by section 'A.3.1 Level limits + * common to the Baseline, Main, and Extended profiles'. + */ +#define V4L2_H264_NUM_DPB_ENTRIES 16 + /* Our pixel format isn't stable at the moment */ #define V4L2_PIX_FMT_H264_SLICE v4l2_fourcc('S', '2', '6', '4') /* H264 parsed slices */ @@ -201,7 +207,7 @@ struct v4l2_h264_dpb_entry { #define V4L2_H264_DECODE_PARAM_FLAG_IDR_PIC 0x01 struct v4l2_ctrl_h264_decode_params { - struct v4l2_h264_dpb_entry dpb[16]; + struct v4l2_h264_dpb_entry dpb[V4L2_H264_NUM_DPB_ENTRIES]; __u16 num_slices; __u16 nal_ref_idc; __s32 top_field_order_cnt; |