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Keep slice data partition NALs in clear 

CENCv3 recommends only encrypting video data in slice NALs. Slice
data partition NALs should not be encrypted.

In the code, differentiate is_vcl and is_video_slice. They are the
same for H265; for H264, vcl NALs include slice data partition NALs
but video_slice NALs do not.

Change-Id: I91f4bdd76d25f0eac50e39aed350ebce3f667121
This commit is contained in:
Kongqun Yang 2017-02-28 18:10:28 -08:00
parent 5c07ff6b1c
commit c223bc9144
5 changed files with 14 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
packager/media/codecs/nalu_reader.cc
View File

@ -79,10 +79,11 @@ bool Nalu::InitializeFromH264(const uint8_t* data, uint64_t size) {
}
is_aud_ = type_ == H264_AUD;
is_video_slice_ = (type_ >= Nalu::H264_NonIDRSlice &&
type_ <= Nalu::H264_IDRSlice);
is_vcl_ = (type_ >= Nalu::H264_NonIDRSlice && type_ <= Nalu::H264_IDRSlice);
is_video_slice_ =
(type_ == Nalu::H264_NonIDRSlice || type_ == Nalu::H264_IDRSlice);
can_start_access_unit_ =
(is_video_slice_ || type_ == Nalu::H264_AUD || type_ == Nalu::H264_SPS ||
(is_vcl_ || type_ == Nalu::H264_AUD || type_ == Nalu::H264_SPS ||
type_ == Nalu::H264_PPS || type_ == Nalu::H264_SEIMessage ||
(type_ >= Nalu::H264_PrefixNALUnit && type_ <= Nalu::H264_Reserved18));
return true;
@ -147,10 +148,11 @@ bool Nalu::InitializeFromH265(const uint8_t* data, uint64_t size) {
}
is_aud_ = type_ == H265_AUD;
is_video_slice_ = type_ >= Nalu::H265_TRAIL_N && type_ <= Nalu::H265_CRA_NUT;
is_vcl_ = type_ >= Nalu::H265_TRAIL_N && type_ <= Nalu::H265_CRA_NUT;
is_video_slice_ = is_vcl_;
can_start_access_unit_ =
nuh_layer_id_ == 0 &&
(is_video_slice_ || type_ == Nalu::H265_AUD || type_ == Nalu::H265_VPS ||
(is_vcl_ || type_ == Nalu::H265_AUD || type_ == Nalu::H265_VPS ||
type_ == Nalu::H265_SPS || type_ == Nalu::H265_PPS ||
type_ == Nalu::H265_PREFIX_SEI ||
(type_ >= Nalu::H265_RSV_NVCL41 && type_ <= Nalu::H265_RSV_NVCL44) ||

3
packager/media/codecs/nalu_reader.h
View File

@ -111,6 +111,8 @@ class Nalu {
/// return value.
int type() const { return type_; }
bool is_aud() const { return is_aud_; }
bool is_vcl() const { return is_vcl_; }
/// Slice data partition NALs are not considered as slice NALs.
bool is_video_slice() const { return is_video_slice_; }
bool can_start_access_unit() const { return can_start_access_unit_; }
@ -132,6 +134,7 @@ class Nalu {
int nuh_temporal_id_ = 0;
int type_ = 0;
bool is_aud_ = false;
bool is_vcl_ = false;
bool is_video_slice_ = false;
bool can_start_access_unit_ = false;

2
packager/media/formats/mp2t/es_parser_h265.cc
View File

@ -73,7 +73,7 @@ bool EsParserH265::ProcessNalu(const Nalu& nalu,
break;
}
default: {
if (nalu.is_video_slice() && nalu.nuh_layer_id() == 0) {
if (nalu.is_vcl() && nalu.nuh_layer_id() == 0) {
const bool is_key_frame = nalu.type() == Nalu::H265_IDR_W_RADL ||
nalu.type() == Nalu::H265_IDR_N_LP;
DVLOG(LOG_LEVEL_ES) << "Nalu: slice KeyFrame=" << is_key_frame;

4
packager/media/formats/mp2t/es_parser_h26x.cc
View File

@ -192,14 +192,14 @@ bool EsParserH26x::ParseInternal() {
next_access_unit_position_ = position;
}
RCHECK(ProcessNalu(nalu, &video_slice_info));
if (nalu.is_video_slice() && !video_slice_info.valid) {
if (nalu.is_vcl() && !video_slice_info.valid) {
// This could happen only if decoder config is not available yet. Drop
// this frame.
DCHECK(!current_video_slice_info_.valid);
next_access_unit_position_set_ = false;
continue;
}
} else if (nalu.is_video_slice()) {
} else if (nalu.is_vcl()) {
// This isn't the first VCL NAL unit. Next access unit should start after
// this NAL unit.
next_access_unit_position_set_ = false;

2
packager/media/formats/mp2t/es_parser_h26x_unittest.cc
View File

@ -93,7 +93,7 @@ class TestableEsParser : public EsParserH26x {
: (nalu.type() == Nalu::H265_SPS)) {
video_slice_info->valid = false;
decoder_config_check_pending_ = true;
} else if (nalu.is_video_slice()) {
} else if (nalu.is_vcl()) {
video_slice_info->valid = true;
// This should be the same as EsParserH26x::ProcessNalu.
if (codec_type_ == Nalu::kH264) {