515 lines
19 KiB
C++
515 lines
19 KiB
C++
// Copyright 2017 Google Inc. All rights reserved.
|
|
//
|
|
// Use of this source code is governed by a BSD-style
|
|
// license that can be found in the LICENSE file or at
|
|
// https://developers.google.com/open-source/licenses/bsd
|
|
|
|
#include "packager/media/crypto/encryption_handler.h"
|
|
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#include <limits>
|
|
|
|
#include "packager/media/base/aes_encryptor.h"
|
|
#include "packager/media/base/aes_pattern_cryptor.h"
|
|
#include "packager/media/base/key_source.h"
|
|
#include "packager/media/base/media_sample.h"
|
|
#include "packager/media/base/video_stream_info.h"
|
|
#include "packager/media/codecs/video_slice_header_parser.h"
|
|
#include "packager/media/codecs/vp8_parser.h"
|
|
#include "packager/media/codecs/vp9_parser.h"
|
|
|
|
namespace shaka {
|
|
namespace media {
|
|
|
|
namespace {
|
|
const size_t kCencBlockSize = 16u;
|
|
|
|
// The default KID for key rotation is all 0s.
|
|
const uint8_t kKeyRotationDefaultKeyId[] = {
|
|
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
|
|
};
|
|
|
|
// Adds one or more subsamples to |*decrypt_config|. This may add more than one
|
|
// if one of the values overflows the integer in the subsample.
|
|
void AddSubsample(uint64_t clear_bytes,
|
|
uint64_t cipher_bytes,
|
|
DecryptConfig* decrypt_config) {
|
|
CHECK_LT(cipher_bytes, std::numeric_limits<uint32_t>::max());
|
|
const uint64_t kUInt16Max = std::numeric_limits<uint16_t>::max();
|
|
while (clear_bytes > kUInt16Max) {
|
|
decrypt_config->AddSubsample(kUInt16Max, 0);
|
|
clear_bytes -= kUInt16Max;
|
|
}
|
|
|
|
if (clear_bytes > 0 || cipher_bytes > 0)
|
|
decrypt_config->AddSubsample(clear_bytes, cipher_bytes);
|
|
}
|
|
|
|
uint8_t GetNaluLengthSize(const StreamInfo& stream_info) {
|
|
if (stream_info.stream_type() != kStreamVideo)
|
|
return 0;
|
|
|
|
const VideoStreamInfo& video_stream_info =
|
|
static_cast<const VideoStreamInfo&>(stream_info);
|
|
return video_stream_info.nalu_length_size();
|
|
}
|
|
|
|
std::string GetStreamLabelForEncryption(
|
|
const StreamInfo& stream_info,
|
|
const std::function<std::string(
|
|
const EncryptionParams::EncryptedStreamAttributes& stream_attributes)>&
|
|
stream_label_func) {
|
|
EncryptionParams::EncryptedStreamAttributes stream_attributes;
|
|
if (stream_info.stream_type() == kStreamAudio) {
|
|
stream_attributes.stream_type =
|
|
EncryptionParams::EncryptedStreamAttributes::kAudio;
|
|
} else if (stream_info.stream_type() == kStreamVideo) {
|
|
const VideoStreamInfo& video_stream_info =
|
|
static_cast<const VideoStreamInfo&>(stream_info);
|
|
stream_attributes.stream_type =
|
|
EncryptionParams::EncryptedStreamAttributes::kVideo;
|
|
stream_attributes.oneof.video.width = video_stream_info.width();
|
|
stream_attributes.oneof.video.height = video_stream_info.height();
|
|
}
|
|
return stream_label_func(stream_attributes);
|
|
}
|
|
} // namespace
|
|
|
|
EncryptionHandler::EncryptionHandler(const EncryptionParams& encryption_params,
|
|
KeySource* key_source)
|
|
: encryption_params_(encryption_params),
|
|
protection_scheme_(
|
|
static_cast<FourCC>(encryption_params.protection_scheme)),
|
|
key_source_(key_source) {}
|
|
|
|
EncryptionHandler::~EncryptionHandler() {}
|
|
|
|
Status EncryptionHandler::InitializeInternal() {
|
|
if (!encryption_params_.stream_label_func) {
|
|
return Status(error::INVALID_ARGUMENT, "Stream label function not set.");
|
|
}
|
|
if (num_input_streams() != 1 || next_output_stream_index() != 1) {
|
|
return Status(error::INVALID_ARGUMENT,
|
|
"Expects exactly one input and output.");
|
|
}
|
|
return Status::OK;
|
|
}
|
|
|
|
Status EncryptionHandler::Process(std::unique_ptr<StreamData> stream_data) {
|
|
Status status;
|
|
switch (stream_data->stream_data_type) {
|
|
case StreamDataType::kStreamInfo:
|
|
status = ProcessStreamInfo(stream_data->stream_info.get());
|
|
break;
|
|
case StreamDataType::kSegmentInfo: {
|
|
SegmentInfo* segment_info = stream_data->segment_info.get();
|
|
segment_info->is_encrypted = remaining_clear_lead_ <= 0;
|
|
|
|
const bool key_rotation_enabled = crypto_period_duration_ != 0;
|
|
if (key_rotation_enabled)
|
|
segment_info->key_rotation_encryption_config = encryption_config_;
|
|
if (!segment_info->is_subsegment) {
|
|
if (key_rotation_enabled)
|
|
check_new_crypto_period_ = true;
|
|
if (remaining_clear_lead_ > 0)
|
|
remaining_clear_lead_ -= segment_info->duration;
|
|
}
|
|
break;
|
|
}
|
|
case StreamDataType::kMediaSample:
|
|
status = ProcessMediaSample(stream_data->media_sample.get());
|
|
break;
|
|
default:
|
|
VLOG(3) << "Stream data type "
|
|
<< static_cast<int>(stream_data->stream_data_type) << " ignored.";
|
|
break;
|
|
}
|
|
return status.ok() ? Dispatch(std::move(stream_data)) : status;
|
|
}
|
|
|
|
Status EncryptionHandler::ProcessStreamInfo(StreamInfo* stream_info) {
|
|
if (stream_info->is_encrypted()) {
|
|
return Status(error::INVALID_ARGUMENT,
|
|
"Input stream is already encrypted.");
|
|
}
|
|
|
|
remaining_clear_lead_ =
|
|
encryption_params_.clear_lead_in_seconds * stream_info->time_scale();
|
|
crypto_period_duration_ =
|
|
encryption_params_.crypto_period_duration_in_seconds *
|
|
stream_info->time_scale();
|
|
codec_ = stream_info->codec();
|
|
nalu_length_size_ = GetNaluLengthSize(*stream_info);
|
|
stream_label_ = GetStreamLabelForEncryption(
|
|
*stream_info, encryption_params_.stream_label_func);
|
|
switch (codec_) {
|
|
case kCodecVP9:
|
|
if (encryption_params_.vp9_subsample_encryption)
|
|
vpx_parser_.reset(new VP9Parser);
|
|
break;
|
|
case kCodecH264:
|
|
header_parser_.reset(new H264VideoSliceHeaderParser);
|
|
break;
|
|
case kCodecH265:
|
|
header_parser_.reset(new H265VideoSliceHeaderParser);
|
|
break;
|
|
default:
|
|
// Other codecs should have nalu length size == 0.
|
|
if (nalu_length_size_ > 0) {
|
|
LOG(WARNING) << "Unknown video codec '" << codec_ << "'";
|
|
return Status(error::ENCRYPTION_FAILURE, "Unknown video codec.");
|
|
}
|
|
}
|
|
if (header_parser_) {
|
|
CHECK_NE(nalu_length_size_, 0u) << "AnnexB stream is not supported yet";
|
|
if (!header_parser_->Initialize(stream_info->codec_config())) {
|
|
return Status(error::ENCRYPTION_FAILURE,
|
|
"Fail to read SPS and PPS data.");
|
|
}
|
|
}
|
|
|
|
Status status = SetupProtectionPattern(stream_info->stream_type());
|
|
if (!status.ok())
|
|
return status;
|
|
|
|
EncryptionKey encryption_key;
|
|
const bool key_rotation_enabled = crypto_period_duration_ != 0;
|
|
if (key_rotation_enabled) {
|
|
check_new_crypto_period_ = true;
|
|
// Setup dummy key id and key to signal encryption for key rotation.
|
|
encryption_key.key_id.assign(
|
|
kKeyRotationDefaultKeyId,
|
|
kKeyRotationDefaultKeyId + sizeof(kKeyRotationDefaultKeyId));
|
|
// The key is not really used to encrypt any data. It is there just for
|
|
// convenience.
|
|
encryption_key.key = encryption_key.key_id;
|
|
} else {
|
|
status = key_source_->GetKey(stream_label_, &encryption_key);
|
|
if (!status.ok())
|
|
return status;
|
|
}
|
|
if (!CreateEncryptor(encryption_key))
|
|
return Status(error::ENCRYPTION_FAILURE, "Failed to create encryptor");
|
|
|
|
stream_info->set_is_encrypted(true);
|
|
stream_info->set_has_clear_lead(encryption_params_.clear_lead_in_seconds > 0);
|
|
stream_info->set_encryption_config(*encryption_config_);
|
|
return Status::OK;
|
|
}
|
|
|
|
Status EncryptionHandler::ProcessMediaSample(MediaSample* sample) {
|
|
// We need to parse the frame (which also updates the vpx parser) even if the
|
|
// frame is not encrypted as the next (encrypted) frame may be dependent on
|
|
// this clear frame.
|
|
std::vector<VPxFrameInfo> vpx_frames;
|
|
if (vpx_parser_ &&
|
|
!vpx_parser_->Parse(sample->data(), sample->data_size(), &vpx_frames)) {
|
|
return Status(error::ENCRYPTION_FAILURE, "Failed to parse vpx frame.");
|
|
}
|
|
|
|
// Need to setup the encryptor for new segments even if this segment does not
|
|
// need to be encrypted, so we can signal encryption metadata earlier to
|
|
// allows clients to prefetch the keys.
|
|
if (check_new_crypto_period_) {
|
|
const int64_t current_crypto_period_index =
|
|
sample->dts() / crypto_period_duration_;
|
|
if (current_crypto_period_index != prev_crypto_period_index_) {
|
|
EncryptionKey encryption_key;
|
|
Status status = key_source_->GetCryptoPeriodKey(
|
|
current_crypto_period_index, stream_label_, &encryption_key);
|
|
if (!status.ok())
|
|
return status;
|
|
if (!CreateEncryptor(encryption_key))
|
|
return Status(error::ENCRYPTION_FAILURE, "Failed to create encryptor");
|
|
prev_crypto_period_index_ = current_crypto_period_index;
|
|
}
|
|
check_new_crypto_period_ = false;
|
|
}
|
|
|
|
if (remaining_clear_lead_ > 0)
|
|
return Status::OK;
|
|
|
|
std::unique_ptr<DecryptConfig> decrypt_config(
|
|
new DecryptConfig(encryption_config_->key_id, encryptor_->iv(),
|
|
std::vector<SubsampleEntry>(), protection_scheme_,
|
|
crypt_byte_block_, skip_byte_block_));
|
|
bool result = true;
|
|
if (vpx_parser_) {
|
|
result = EncryptVpxFrame(vpx_frames, sample, decrypt_config.get());
|
|
if (result) {
|
|
DCHECK_EQ(decrypt_config->GetTotalSizeOfSubsamples(),
|
|
sample->data_size());
|
|
}
|
|
} else if (header_parser_) {
|
|
result = EncryptNalFrame(sample, decrypt_config.get());
|
|
if (result) {
|
|
DCHECK_EQ(decrypt_config->GetTotalSizeOfSubsamples(),
|
|
sample->data_size());
|
|
}
|
|
} else {
|
|
if (sample->data_size() > leading_clear_bytes_size_) {
|
|
EncryptBytes(sample->writable_data() + leading_clear_bytes_size_,
|
|
sample->data_size() - leading_clear_bytes_size_);
|
|
}
|
|
}
|
|
if (!result)
|
|
return Status(error::ENCRYPTION_FAILURE, "Failed to encrypt samples.");
|
|
sample->set_is_encrypted(true);
|
|
sample->set_decrypt_config(std::move(decrypt_config));
|
|
encryptor_->UpdateIv();
|
|
return Status::OK;
|
|
}
|
|
|
|
Status EncryptionHandler::SetupProtectionPattern(StreamType stream_type) {
|
|
switch (protection_scheme_) {
|
|
case kAppleSampleAesProtectionScheme: {
|
|
const size_t kH264LeadingClearBytesSize = 32u;
|
|
const size_t kSmallNalUnitSize = 32u + 16u;
|
|
const size_t kAudioLeadingClearBytesSize = 16u;
|
|
switch (codec_) {
|
|
case kCodecH264:
|
|
// Apple Sample AES uses 1:9 pattern for video.
|
|
crypt_byte_block_ = 1u;
|
|
skip_byte_block_ = 9u;
|
|
leading_clear_bytes_size_ = kH264LeadingClearBytesSize;
|
|
min_protected_data_size_ = kSmallNalUnitSize + 1u;
|
|
break;
|
|
case kCodecAAC:
|
|
FALLTHROUGH_INTENDED;
|
|
case kCodecAC3:
|
|
// Audio is whole sample encrypted. We could not use a
|
|
// crypto_byte_block_ of 1 here as if there is one crypto block
|
|
// remaining, it need not be encrypted for video but it needs to be
|
|
// encrypted for audio.
|
|
crypt_byte_block_ = 0u;
|
|
skip_byte_block_ = 0u;
|
|
leading_clear_bytes_size_ = kAudioLeadingClearBytesSize;
|
|
min_protected_data_size_ = leading_clear_bytes_size_ + 1u;
|
|
break;
|
|
default:
|
|
return Status(error::ENCRYPTION_FAILURE,
|
|
"Only AAC/AC3 and H264 are supported in Sample AES.");
|
|
}
|
|
break;
|
|
}
|
|
case FOURCC_cbcs:
|
|
FALLTHROUGH_INTENDED;
|
|
case FOURCC_cens:
|
|
if (stream_type == kStreamVideo) {
|
|
// Use 1:9 pattern for video.
|
|
crypt_byte_block_ = 1u;
|
|
skip_byte_block_ = 9u;
|
|
} else {
|
|
// Tracks other than video are protected using whole-block full-sample
|
|
// encryption, which is essentially a pattern of 1:0. Note that this may
|
|
// not be the same as the non-pattern based encryption counterparts,
|
|
// e.g. in 'cens' for full sample encryption, the whole sample is
|
|
// encrypted up to the last 16-byte boundary, see 23001-7:2016(E) 9.7;
|
|
// while in 'cenc' for full sample encryption, the last partial 16-byte
|
|
// block is also encrypted, see 23001-7:2016(E) 9.4.2. Another
|
|
// difference is the use of constant iv.
|
|
crypt_byte_block_ = 1u;
|
|
skip_byte_block_ = 0u;
|
|
}
|
|
break;
|
|
default:
|
|
// Not using pattern encryption.
|
|
crypt_byte_block_ = 0u;
|
|
skip_byte_block_ = 0u;
|
|
}
|
|
return Status::OK;
|
|
}
|
|
|
|
bool EncryptionHandler::CreateEncryptor(const EncryptionKey& encryption_key) {
|
|
std::unique_ptr<AesCryptor> encryptor;
|
|
switch (protection_scheme_) {
|
|
case FOURCC_cenc:
|
|
encryptor.reset(new AesCtrEncryptor);
|
|
break;
|
|
case FOURCC_cbc1:
|
|
encryptor.reset(new AesCbcEncryptor(kNoPadding));
|
|
break;
|
|
case FOURCC_cens:
|
|
encryptor.reset(new AesPatternCryptor(
|
|
crypt_byte_block_, skip_byte_block_,
|
|
AesPatternCryptor::kEncryptIfCryptByteBlockRemaining,
|
|
AesCryptor::kDontUseConstantIv,
|
|
std::unique_ptr<AesCryptor>(new AesCtrEncryptor())));
|
|
break;
|
|
case FOURCC_cbcs:
|
|
encryptor.reset(new AesPatternCryptor(
|
|
crypt_byte_block_, skip_byte_block_,
|
|
AesPatternCryptor::kEncryptIfCryptByteBlockRemaining,
|
|
AesCryptor::kUseConstantIv,
|
|
std::unique_ptr<AesCryptor>(new AesCbcEncryptor(kNoPadding))));
|
|
break;
|
|
case kAppleSampleAesProtectionScheme:
|
|
if (crypt_byte_block_ == 0 && skip_byte_block_ == 0) {
|
|
encryptor.reset(
|
|
new AesCbcEncryptor(kNoPadding, AesCryptor::kUseConstantIv));
|
|
} else {
|
|
encryptor.reset(new AesPatternCryptor(
|
|
crypt_byte_block_, skip_byte_block_,
|
|
AesPatternCryptor::kSkipIfCryptByteBlockRemaining,
|
|
AesCryptor::kUseConstantIv,
|
|
std::unique_ptr<AesCryptor>(new AesCbcEncryptor(kNoPadding))));
|
|
}
|
|
break;
|
|
default:
|
|
LOG(ERROR) << "Unsupported protection scheme.";
|
|
return false;
|
|
}
|
|
|
|
std::vector<uint8_t> iv = encryption_key.iv;
|
|
if (iv.empty()) {
|
|
if (!AesCryptor::GenerateRandomIv(protection_scheme_, &iv)) {
|
|
LOG(ERROR) << "Failed to generate random iv.";
|
|
return false;
|
|
}
|
|
}
|
|
const bool initialized =
|
|
encryptor->InitializeWithIv(encryption_key.key, iv);
|
|
encryptor_ = std::move(encryptor);
|
|
|
|
encryption_config_.reset(new EncryptionConfig);
|
|
encryption_config_->protection_scheme = protection_scheme_;
|
|
encryption_config_->crypt_byte_block = crypt_byte_block_;
|
|
encryption_config_->skip_byte_block = skip_byte_block_;
|
|
if (encryptor_->use_constant_iv()) {
|
|
encryption_config_->per_sample_iv_size = 0;
|
|
encryption_config_->constant_iv = iv;
|
|
} else {
|
|
encryption_config_->per_sample_iv_size = static_cast<uint8_t>(iv.size());
|
|
}
|
|
encryption_config_->key_id = encryption_key.key_id;
|
|
encryption_config_->key_system_info = encryption_key.key_system_info;
|
|
return initialized;
|
|
}
|
|
|
|
bool EncryptionHandler::EncryptVpxFrame(
|
|
const std::vector<VPxFrameInfo>& vpx_frames,
|
|
MediaSample* sample,
|
|
DecryptConfig* decrypt_config) {
|
|
uint8_t* data = sample->writable_data();
|
|
for (const VPxFrameInfo& frame : vpx_frames) {
|
|
uint16_t clear_bytes =
|
|
static_cast<uint16_t>(frame.uncompressed_header_size);
|
|
uint32_t cipher_bytes = static_cast<uint32_t>(
|
|
frame.frame_size - frame.uncompressed_header_size);
|
|
|
|
// "VP Codec ISO Media File Format Binding" document requires that the
|
|
// encrypted bytes of each frame within the superframe must be block
|
|
// aligned so that the counter state can be computed for each frame
|
|
// within the superframe.
|
|
// ISO/IEC 23001-7:2016 10.2 'cbc1' 10.3 'cens'
|
|
// The BytesOfProtectedData size SHALL be a multiple of 16 bytes to
|
|
// avoid partial blocks in Subsamples.
|
|
// For consistency, apply block alignment to all frames.
|
|
const uint16_t misalign_bytes = cipher_bytes % kCencBlockSize;
|
|
clear_bytes += misalign_bytes;
|
|
cipher_bytes -= misalign_bytes;
|
|
|
|
decrypt_config->AddSubsample(clear_bytes, cipher_bytes);
|
|
if (cipher_bytes > 0)
|
|
EncryptBytes(data + clear_bytes, cipher_bytes);
|
|
data += frame.frame_size;
|
|
}
|
|
// Add subsample for the superframe index if exists.
|
|
const bool is_superframe = vpx_frames.size() > 1;
|
|
if (is_superframe) {
|
|
size_t index_size = sample->data() + sample->data_size() - data;
|
|
DCHECK_LE(index_size, 2 + vpx_frames.size() * 4);
|
|
DCHECK_GE(index_size, 2 + vpx_frames.size() * 1);
|
|
uint16_t clear_bytes = static_cast<uint16_t>(index_size);
|
|
uint32_t cipher_bytes = 0;
|
|
decrypt_config->AddSubsample(clear_bytes, cipher_bytes);
|
|
}
|
|
return true;
|
|
}
|
|
|
|
bool EncryptionHandler::EncryptNalFrame(MediaSample* sample,
|
|
DecryptConfig* decrypt_config) {
|
|
DCHECK_NE(nalu_length_size_, 0u);
|
|
DCHECK(header_parser_);
|
|
const Nalu::CodecType nalu_type =
|
|
(codec_ == kCodecH265) ? Nalu::kH265 : Nalu::kH264;
|
|
NaluReader reader(nalu_type, nalu_length_size_, sample->writable_data(),
|
|
sample->data_size());
|
|
|
|
// Store the current length of clear data. This is used to squash
|
|
// multiple unencrypted NAL units into fewer subsample entries.
|
|
uint64_t accumulated_clear_bytes = 0;
|
|
|
|
Nalu nalu;
|
|
NaluReader::Result result;
|
|
while ((result = reader.Advance(&nalu)) == NaluReader::kOk) {
|
|
const uint64_t nalu_total_size = nalu.header_size() + nalu.payload_size();
|
|
if (nalu.is_video_slice() && nalu_total_size >= min_protected_data_size_) {
|
|
uint64_t current_clear_bytes = leading_clear_bytes_size_;
|
|
if (current_clear_bytes == 0) {
|
|
// For video-slice NAL units, encrypt the video slice. This skips
|
|
// the frame header.
|
|
const int64_t video_slice_header_size =
|
|
header_parser_->GetHeaderSize(nalu);
|
|
if (video_slice_header_size < 0) {
|
|
LOG(ERROR) << "Failed to read slice header.";
|
|
return false;
|
|
}
|
|
current_clear_bytes = nalu.header_size() + video_slice_header_size;
|
|
}
|
|
uint64_t cipher_bytes = nalu_total_size - current_clear_bytes;
|
|
|
|
// ISO/IEC 23001-7:2016 10.2 'cbc1' 10.3 'cens'
|
|
// The BytesOfProtectedData size SHALL be a multiple of 16 bytes to
|
|
// avoid partial blocks in Subsamples.
|
|
// CMAF requires 'cenc' scheme BytesOfProtectedData SHALL be a multiple
|
|
// of 16 bytes; while 'cbcs' scheme BytesOfProtectedData SHALL start on
|
|
// the first byte of video data following the slice header.
|
|
if (protection_scheme_ == FOURCC_cbc1 ||
|
|
protection_scheme_ == FOURCC_cens ||
|
|
protection_scheme_ == FOURCC_cenc) {
|
|
const uint16_t misalign_bytes = cipher_bytes % kCencBlockSize;
|
|
current_clear_bytes += misalign_bytes;
|
|
cipher_bytes -= misalign_bytes;
|
|
}
|
|
|
|
const uint8_t* nalu_data = nalu.data() + current_clear_bytes;
|
|
EncryptBytes(const_cast<uint8_t*>(nalu_data), cipher_bytes);
|
|
|
|
AddSubsample(
|
|
accumulated_clear_bytes + nalu_length_size_ + current_clear_bytes,
|
|
cipher_bytes, decrypt_config);
|
|
accumulated_clear_bytes = 0;
|
|
} else {
|
|
// For non-video-slice or small NAL units, don't encrypt.
|
|
accumulated_clear_bytes += nalu_length_size_ + nalu_total_size;
|
|
}
|
|
}
|
|
if (result != NaluReader::kEOStream) {
|
|
LOG(ERROR) << "Failed to parse NAL units.";
|
|
return false;
|
|
}
|
|
AddSubsample(accumulated_clear_bytes, 0, decrypt_config);
|
|
return true;
|
|
}
|
|
|
|
void EncryptionHandler::EncryptBytes(uint8_t* data, size_t size) {
|
|
DCHECK(encryptor_);
|
|
CHECK(encryptor_->Crypt(data, size, data));
|
|
}
|
|
|
|
void EncryptionHandler::InjectVpxParserForTesting(
|
|
std::unique_ptr<VPxParser> vpx_parser) {
|
|
vpx_parser_ = std::move(vpx_parser);
|
|
}
|
|
|
|
void EncryptionHandler::InjectVideoSliceHeaderParserForTesting(
|
|
std::unique_ptr<VideoSliceHeaderParser> header_parser) {
|
|
header_parser_ = std::move(header_parser);
|
|
}
|
|
|
|
} // namespace media
|
|
} // namespace shaka
|