Do not partially encrypt a segment
Mimic iso-bmff behavior: either all the samples in a segment are encrypted or all the samples are clear. Change-Id: I03bdbbf5a4b690f4d87c4dceb0f8155e6fae941e
This commit is contained in:
Kongqun Yang
parent
23f2913248
commit
de9667080f
Binary file not shown.
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@ -19,7 +19,6 @@ const std::string kKeyId = "4c6f72656d20697073756d20646f6c6f";
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const std::string kIv = "0123456789012345";
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const std::string kKey = "01234567890123456789012345678901";
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const std::string kPsshData = "";
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const uint8_t kBasicSupportData[] = {
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// ID: EBML Header, Payload Size: 31
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0x1a, 0x45, 0xdf, 0xa3, 0x9f,
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@ -37,8 +36,8 @@ const uint8_t kBasicSupportData[] = {
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0x42, 0x87, 0x81, 0x02,
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// DocTypeReadVersion: 2
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0x42, 0x85, 0x81, 0x02,
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// ID: Segment, Payload Size: 411
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0x18, 0x53, 0x80, 0x67, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x9b,
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// ID: Segment, Payload Size: 432
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0x18, 0x53, 0x80, 0x67, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0xb0,
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// ID: SeekHead, Payload Size: 58
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0x11, 0x4d, 0x9b, 0x74, 0xba,
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// ID: Seek, Payload Size: 11
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@ -63,8 +62,8 @@ const uint8_t kBasicSupportData[] = {
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0x4d, 0xbb, 0x8c,
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// SeekID: binary(4) (Cues)
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0x53, 0xab, 0x84, 0x1c, 0x53, 0xbb, 0x6b,
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// SeekPosition: 392
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0x53, 0xac, 0x82, 0x01, 0x88,
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// SeekPosition: 398
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0x53, 0xac, 0x82, 0x01, 0x8e,
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// ID: Void, Payload Size: 24
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0xec, 0x98, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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@ -131,8 +130,8 @@ const uint8_t kBasicSupportData[] = {
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0x54, 0xb0, 0x81, 0x64,
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// DisplayHeight: 100
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0x54, 0xba, 0x81, 0x64,
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// ID: Cluster, Payload Size: 101
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0x1f, 0x43, 0xb6, 0x75, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x65,
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// ID: Cluster, Payload Size: 45
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0x1f, 0x43, 0xb6, 0x75, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2d,
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// Timecode: 0
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0xe7, 0x81, 0x00,
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// ID: SimpleBlock, Payload Size: 10
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@ -141,44 +140,48 @@ const uint8_t kBasicSupportData[] = {
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0x00,
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// Frame Data:
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0xde, 0xad, 0xbe, 0xef, 0x00,
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// ID: SimpleBlock, Payload Size: 18
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0xa3, 0x92, 0x81, 0x03, 0xe8, 0x80,
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// ID: SimpleBlock, Payload Size: 10
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0xa3, 0x8a, 0x81, 0x03, 0xe8, 0x80,
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// Signal Byte: Clear
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0x00,
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// Frame Data:
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0xde, 0xad, 0xbe, 0xef, 0x00,
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// ID: BlockGroup, Payload Size: 16
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0xa0, 0x90,
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// ID: Block, Payload Size: 10
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0xa1, 0x8a, 0x81, 0x07, 0xd0, 0x00,
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// Signal Byte: Clear
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0x00,
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// Frame Data:
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0xde, 0xad, 0xbe, 0xef, 0x00,
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// BlockDuration: 1000
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0x9b, 0x82, 0x03, 0xe8,
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// ID: Cluster, Payload Size: 50
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0x1f, 0x43, 0xb6, 0x75, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x32,
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// Timecode: 3000
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0xe7, 0x82, 0x0b, 0xb8,
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// ID: SimpleBlock: Payload Size: 18
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0xa3, 0x92, 0x81, 0x00,0x00, 0x80,
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// Signal Byte: Encrypted
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0x01,
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// IV:
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0x01, 0x23, 0x45, 0x67, 0x89, 0x01, 0x23, 0x45,
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// Frame Data:
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0xcc, 0x03, 0xef, 0xc4, 0xf4,
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// ID: SimpleBlock, Payload Size: 18
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0xa3, 0x92, 0x81, 0x07, 0xd0, 0x80,
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// Signal Byte: Encrypted
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0x01,
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// IV:
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0x01, 0x23, 0x45, 0x67, 0x89, 0x01, 0x23, 0x46,
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// Frame Data:
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0xbf, 0x38, 0x72, 0x20, 0xac,
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// ID: SimpleBlock, Payload Size: 18
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0xa3, 0x92, 0x81, 0x0b, 0xb8, 0x80,
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// Signal Byte: Encrypted
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0x01,
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// IV:
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0x01, 0x23, 0x45, 0x67, 0x89, 0x01, 0x23, 0x47,
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// Frame Data:
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0x0d, 0x8e, 0xae, 0xbe, 0xd0,
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// ID: BlockGroup, Payload Size: 24
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0xa0, 0x98,
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// ID: Block, Payload Size: 18
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0xa1, 0x92, 0x81, 0x0f, 0xa0, 0x00,
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0xa1, 0x92, 0x81, 0x03, 0xe8, 0x00,
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// Signal Byte: Encrypted
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0x01,
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// IV:
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0x01, 0x23, 0x45, 0x67, 0x89, 0x01, 0x23, 0x48,
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0x01, 0x23, 0x45, 0x67, 0x89, 0x01, 0x23, 0x46,
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// Frame Data:
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0xa5, 0x97, 0xf8, 0x9e, 0x87,
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0xbf, 0x38, 0x72, 0x20, 0xac,
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// BlockDuration: 1000
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0x9b, 0x82, 0x03, 0xe8,
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// ID: Cues, Payload Size: 14
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0x1c, 0x53, 0xbb, 0x6b, 0x8e,
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// ID: Cues, Payload Size: 29
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0x1c, 0x53, 0xbb, 0x6b, 0x9d,
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// ID: CuePoint, Payload Size: 12
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0xbb, 0x8c,
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// CueTime: 0
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@ -188,7 +191,17 @@ const uint8_t kBasicSupportData[] = {
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// CueTrack: 1
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0xf7, 0x81, 0x01,
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// CueClusterPosition: 279
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0xf1, 0x82, 0x01, 0x17
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0xf1, 0x82, 0x01, 0x17,
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// ID: CuePoint, Payload Size: 13
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0xbb, 0x8d,
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// CueTime: 3000
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0xb3, 0x82, 0x0b, 0xb8,
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// ID: CueTrackPositions, Payload Size: 7
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0xb7, 0x87,
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// CueTrack: 1
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0xf7, 0x81, 0x01,
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// CueClusterPosition: 336
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0xf1, 0x82, 0x01, 0x50,
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};
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} // namespace
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@ -213,9 +226,12 @@ class EncrypedSegmenterTest : public SegmentTestBase {
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TEST_F(EncrypedSegmenterTest, BasicSupport) {
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MuxerOptions options = CreateMuxerOptions();
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options.segment_duration = 3.0;
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ASSERT_NO_FATAL_FAILURE(InitializeSegmenter(options));
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// Write the samples to the Segmenter.
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// There should be 2 segments with the first segment in clear and the second
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// segment encrypted.
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for (int i = 0; i < 5; i++) {
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scoped_refptr<MediaSample> sample =
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CreateSample(kKeyFrame, kDuration, kNoSideData);
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@ -228,4 +244,3 @@ TEST_F(EncrypedSegmenterTest, BasicSupport) {
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} // namespace media
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} // namespace shaka
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@ -32,6 +32,8 @@ int64_t kSecondsToNs = 1000000000L;
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Segmenter::Segmenter(const MuxerOptions& options)
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: reference_frame_timestamp_(0),
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options_(options),
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clear_lead_(0),
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enable_encryption_(false),
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info_(NULL),
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muxer_listener_(NULL),
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progress_listener_(NULL),
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@ -144,6 +146,15 @@ Status Segmenter::AddSample(scoped_refptr<MediaSample> sample) {
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segment_length_sec_ = 0;
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cluster_length_sec_ = 0;
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wrote_frame = true;
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if (encryptor_ && !enable_encryption_) {
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if (sample->pts() - first_timestamp_ >=
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clear_lead_ * info_->time_scale()) {
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enable_encryption_ = true;
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if (muxer_listener_)
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muxer_listener_->OnEncryptionStart();
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}
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}
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}
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} else if (cluster_length_sec_ >= options_.fragment_duration) {
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if (sample->is_key_frame() || !options_.fragment_sap_aligned) {
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@ -161,20 +172,13 @@ Status Segmenter::AddSample(scoped_refptr<MediaSample> sample) {
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// Encrypt the frame.
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if (encryptor_) {
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const bool encrypt_frame =
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static_cast<double>(sample->pts() - first_timestamp_) /
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info_->time_scale() >=
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clear_lead_;
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status = encryptor_->EncryptFrame(sample, encrypt_frame);
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status = encryptor_->EncryptFrame(sample, enable_encryption_);
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if (!status.ok()) {
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LOG(ERROR) << "Error encrypting frame.";
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return status;
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}
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if (encrypt_frame && muxer_listener_)
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muxer_listener_->OnEncryptionStart();
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}
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// Add the sample to the durations even though we have not written the frame
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// yet. This is needed to make sure we split Clusters at the correct point.
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// These are only used in this method.
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@ -135,6 +135,7 @@ class Segmenter {
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const MuxerOptions& options_;
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std::unique_ptr<Encryptor> encryptor_;
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double clear_lead_;
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bool enable_encryption_; // Encryption is enabled only after clear_lead_.
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std::unique_ptr<mkvmuxer::Cluster> cluster_;
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mkvmuxer::Cues cues_;
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