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Fix parsing of VP9 level.

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The VP9 level is contained in the CodecPrivate data.

Change-Id: I65475363ee230b422a8cdce8172f6262cb3329e7
This commit is contained in:
Frank Galligan 2016-04-12 23:00:03 -07:00
parent 836591f4f5
commit a1dc4f2f22
4 changed files with 15 additions and 14 deletions
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13
common/hdr_util.cc
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@ -116,8 +116,8 @@ bool CopyColour(const mkvparser::Colour& parser_colour,
//
// 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
// | ID Byte | Length | |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
// | ID Byte | Length | |
// +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
// | |
// : Bytes 1..Length of Codec Feature :
// | |
@ -132,7 +132,7 @@ bool CopyColour(const mkvparser::Colour& parser_colour,
//
// The X bit is reserved.
//
// Currently only profile level is supported. ID byte must be set to 1, and
// Currently only VP9 level is supported. ID byte must be set to 2, and
// length must be 1. Supported values are:
//
// 10: Level 1
@ -158,12 +158,13 @@ int ParseVpxCodecPrivate(const uint8_t* private_data, int32_t length) {
return 0;
const uint8_t id_byte = *private_data;
if (id_byte != 1)
const uint8_t kVp9LevelId = 2;
if (id_byte != kVp9LevelId)
return 0;
const int kVpxProfileLength = 1;
const int kVpxFeatureLength = 1;
const uint8_t length_byte = private_data[1];
if (length_byte != kVpxProfileLength)
if (length_byte != kVpxFeatureLength)
return 0;
const int level = static_cast<int>(private_data[2]);

2
common/hdr_util.h
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@ -43,7 +43,7 @@ bool ColourValuePresent(long long value);
bool CopyColour(const mkvparser::Colour& parser_colour,
mkvmuxer::Colour* muxer_colour);
// Returns VP9 profile upon success or 0 upon failure.
// Returns VP9 level upon success or 0 upon failure.
int ParseVpxCodecPrivate(const uint8_t* private_data, int32_t length);
} // namespace libwebm

8
testing/parser_tests.cc
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@ -672,15 +672,15 @@ TEST_F(ParserTest, Vp9CodecProfileTest) {
EXPECT_EQ(0, libwebm::ParseVpxCodecPrivate(&bad_codec_private[0], 0));
EXPECT_EQ(0, libwebm::ParseVpxCodecPrivate(&bad_codec_private[0],
kCodecPrivateLength));
const uint8_t good_codec_private[kCodecPrivateLength] = {1, 1, 11};
const uint8_t good_codec_private_level[kCodecPrivateLength] = {2, 1, 11};
// Test parse of codec private chunks, but lie about length.
EXPECT_EQ(0, libwebm::ParseVpxCodecPrivate(&bad_codec_private[0], 0));
EXPECT_EQ(0, libwebm::ParseVpxCodecPrivate(&good_codec_private[0], 0));
EXPECT_EQ(0, libwebm::ParseVpxCodecPrivate(&good_codec_private_level[0], 0));
// Test a valid codec private; this should return 11.
// ID: 1, Length: 1, Profile: 11
EXPECT_EQ(11, libwebm::ParseVpxCodecPrivate(&good_codec_private[0],
// ID: 2, Length: 1, Profile: 11
EXPECT_EQ(11, libwebm::ParseVpxCodecPrivate(&good_codec_private_level[0],
kCodecPrivateLength));
}

6
webm_info.cc
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@ -373,10 +373,10 @@ bool OutputTracks(const mkvparser::Segment& segment, const Options& options,
const std::string codec_id = track->GetCodecId();
const std::string v_vp9 = "V_VP9";
if (codec_id == v_vp9) {
const int vp9_profile_level = libwebm::ParseVpxCodecPrivate(
const int vp9_level = libwebm::ParseVpxCodecPrivate(
private_data, static_cast<int32_t>(private_size));
fprintf(o, "%sVP9 profile level: %d\n", indent->indent_str().c_str(),
vp9_profile_level);
fprintf(o, "%sVP9 level: %d\n", indent->indent_str().c_str(),
vp9_level);
}
}
}