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media: controls: Validate H264 stateless controls 

Check that all the fields that correspond or are related
to a H264 specification syntax element have legal values.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Tested-by: Jernej Skrabec <jernej.skrabec@siol.net>
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 2020-11-26 10:36:11 +01:00 committed by Mauro Carvalho Chehab
parent 8917a5f61e
commit b32e48503d
2 changed files with 143 additions and 0 deletions
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134
drivers/media/v4l2-core/v4l2-ctrls.c
View File

@ -1775,6 +1775,9 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
{
struct v4l2_ctrl_mpeg2_slice_params *p_mpeg2_slice_params;
struct v4l2_ctrl_vp8_frame_header *p_vp8_frame_header;
struct v4l2_ctrl_h264_sps *p_h264_sps;
struct v4l2_ctrl_h264_pps *p_h264_pps;
struct v4l2_ctrl_h264_pred_weights *p_h264_pred_weights;
struct v4l2_ctrl_h264_slice_params *p_h264_slice_params;
struct v4l2_ctrl_h264_decode_params *p_h264_dec_params;
struct v4l2_ctrl_hevc_sps *p_hevc_sps;
@ -1834,20 +1837,151 @@ static int std_validate_compound(const struct v4l2_ctrl *ctrl, u32 idx,
break;
case V4L2_CTRL_TYPE_H264_SPS:
p_h264_sps = p;
/* Some syntax elements are only conditionally valid */
if (p_h264_sps->pic_order_cnt_type != 0) {
p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 = 0;
} else if (p_h264_sps->pic_order_cnt_type != 1) {
p_h264_sps->num_ref_frames_in_pic_order_cnt_cycle = 0;
p_h264_sps->offset_for_non_ref_pic = 0;
p_h264_sps->offset_for_top_to_bottom_field = 0;
memset(&p_h264_sps->offset_for_ref_frame, 0,
sizeof(p_h264_sps->offset_for_ref_frame));
}
if (!V4L2_H264_SPS_HAS_CHROMA_FORMAT(p_h264_sps)) {
p_h264_sps->chroma_format_idc = 1;
p_h264_sps->bit_depth_luma_minus8 = 0;
p_h264_sps->bit_depth_chroma_minus8 = 0;
p_h264_sps->flags &=
~V4L2_H264_SPS_FLAG_QPPRIME_Y_ZERO_TRANSFORM_BYPASS;
if (p_h264_sps->chroma_format_idc < 3)
p_h264_sps->flags &=
~V4L2_H264_SPS_FLAG_SEPARATE_COLOUR_PLANE;
}
if (p_h264_sps->flags & V4L2_H264_SPS_FLAG_FRAME_MBS_ONLY)
p_h264_sps->flags &=
~V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD;
/*
* Chroma 4:2:2 format require at least High 4:2:2 profile.
*
* The H264 specification and well-known parser implementations
* use profile-idc values directly, as that is clearer and
* less ambiguous. We do the same here.
*/
if (p_h264_sps->profile_idc < 122 &&
p_h264_sps->chroma_format_idc > 1)
return -EINVAL;
/* Chroma 4:4:4 format require at least High 4:2:2 profile */
if (p_h264_sps->profile_idc < 244 &&
p_h264_sps->chroma_format_idc > 2)
return -EINVAL;
if (p_h264_sps->chroma_format_idc > 3)
return -EINVAL;
if (p_h264_sps->bit_depth_luma_minus8 > 6)
return -EINVAL;
if (p_h264_sps->bit_depth_chroma_minus8 > 6)
return -EINVAL;
if (p_h264_sps->log2_max_frame_num_minus4 > 12)
return -EINVAL;
if (p_h264_sps->pic_order_cnt_type > 2)
return -EINVAL;
if (p_h264_sps->log2_max_pic_order_cnt_lsb_minus4 > 12)
return -EINVAL;
if (p_h264_sps->max_num_ref_frames > V4L2_H264_REF_LIST_LEN)
return -EINVAL;
break;
case V4L2_CTRL_TYPE_H264_PPS:
p_h264_pps = p;
if (p_h264_pps->num_slice_groups_minus1 > 7)
return -EINVAL;
if (p_h264_pps->num_ref_idx_l0_default_active_minus1 >
(V4L2_H264_REF_LIST_LEN - 1))
return -EINVAL;
if (p_h264_pps->num_ref_idx_l1_default_active_minus1 >
(V4L2_H264_REF_LIST_LEN - 1))
return -EINVAL;
if (p_h264_pps->weighted_bipred_idc > 2)
return -EINVAL;
/*
* pic_init_qp_minus26 shall be in the range of
* -(26 + QpBdOffset_y) to +25, inclusive,
* where QpBdOffset_y is 6 * bit_depth_luma_minus8
*/
if (p_h264_pps->pic_init_qp_minus26 < -62 ||
p_h264_pps->pic_init_qp_minus26 > 25)
return -EINVAL;
if (p_h264_pps->pic_init_qs_minus26 < -26 ||
p_h264_pps->pic_init_qs_minus26 > 25)
return -EINVAL;
if (p_h264_pps->chroma_qp_index_offset < -12 ||
p_h264_pps->chroma_qp_index_offset > 12)
return -EINVAL;
if (p_h264_pps->second_chroma_qp_index_offset < -12 ||
p_h264_pps->second_chroma_qp_index_offset > 12)
return -EINVAL;
break;
case V4L2_CTRL_TYPE_H264_SCALING_MATRIX:
break;
case V4L2_CTRL_TYPE_H264_PRED_WEIGHTS:
p_h264_pred_weights = p;
if (p_h264_pred_weights->luma_log2_weight_denom > 7)
return -EINVAL;
if (p_h264_pred_weights->chroma_log2_weight_denom > 7)
return -EINVAL;
break;
case V4L2_CTRL_TYPE_H264_SLICE_PARAMS:
p_h264_slice_params = p;
if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
p_h264_slice_params->flags &=
~V4L2_H264_SLICE_FLAG_DIRECT_SPATIAL_MV_PRED;
if (p_h264_slice_params->colour_plane_id > 2)
return -EINVAL;
if (p_h264_slice_params->cabac_init_idc > 2)
return -EINVAL;
if (p_h264_slice_params->disable_deblocking_filter_idc > 2)
return -EINVAL;
if (p_h264_slice_params->slice_alpha_c0_offset_div2 < -6 ||
p_h264_slice_params->slice_alpha_c0_offset_div2 > 6)
return -EINVAL;
if (p_h264_slice_params->slice_beta_offset_div2 < -6 ||
p_h264_slice_params->slice_beta_offset_div2 > 6)
return -EINVAL;
if (p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_I ||
p_h264_slice_params->slice_type == V4L2_H264_SLICE_TYPE_SI)
p_h264_slice_params->num_ref_idx_l0_active_minus1 = 0;
if (p_h264_slice_params->slice_type != V4L2_H264_SLICE_TYPE_B)
p_h264_slice_params->num_ref_idx_l1_active_minus1 = 0;
if (p_h264_slice_params->num_ref_idx_l0_active_minus1 >
(V4L2_H264_REF_LIST_LEN - 1))
return -EINVAL;
if (p_h264_slice_params->num_ref_idx_l1_active_minus1 >
(V4L2_H264_REF_LIST_LEN - 1))
return -EINVAL;
zero_reserved(*p_h264_slice_params);
break;
case V4L2_CTRL_TYPE_H264_DECODE_PARAMS:
p_h264_dec_params = p;
if (p_h264_dec_params->nal_ref_idc > 3)
return -EINVAL;
for (i = 0; i < V4L2_H264_NUM_DPB_ENTRIES; i++) {
struct v4l2_h264_dpb_entry *dpb_entry =
&p_h264_dec_params->dpb[i];

9
include/media/h264-ctrls.h
View File

@ -98,6 +98,15 @@ enum v4l2_mpeg_video_h264_start_code {
#define V4L2_H264_SPS_FLAG_MB_ADAPTIVE_FRAME_FIELD 0x20
#define V4L2_H264_SPS_FLAG_DIRECT_8X8_INFERENCE 0x40
#define V4L2_H264_SPS_HAS_CHROMA_FORMAT(sps) \
((sps)->profile_idc == 100 || (sps)->profile_idc == 110 || \
(sps)->profile_idc == 122 || (sps)->profile_idc == 244 || \
(sps)->profile_idc == 44 || (sps)->profile_idc == 83 || \
(sps)->profile_idc == 86 || (sps)->profile_idc == 118 || \
(sps)->profile_idc == 128 || (sps)->profile_idc == 138 || \
(sps)->profile_idc == 139 || (sps)->profile_idc == 134 || \
(sps)->profile_idc == 135)
/**
* struct v4l2_ctrl_h264_sps - H264 sequence parameter set
*