GMS Failures System

Failure Analysis Report¶

Cluster Summary¶

Property	Value
Cluster ID	#3
Severity	High
Category	Media/Codec Issue
Confidence	4/5
Impact	4 failures

System Information¶

Property	Value
Fingerprint	Trimble/T70/thorpe:15/AQ3A.250408.001/02.00.07.250802:user/release-keys
Build ID	AQ3A.250408.001
Product	T70
Model	T70
Android Version	15
Security Patch	2025-07-01
Test Suite	CTS

AI Analysis¶

Summary:
Assertion failure due to non-increasing output timestamps
The test 'testSimpleDecode' in 'CodecDecoderBlockModelMultiAccessUnitDrmTest' failed due to an unexpected output timestamp sequence. The timestamps are expected to be strictly increasing but instead showed a decrease from frame index -1 to frame index 0 with identical values. This could indicate an issue in the decoding process that prevents proper timestamp generation, particularly affecting the asynchronous output mode of the c2.android.aac.decoder.

Root Cause:

The decoder is producing output timestamps that are not strictly increasing, likely due to improper handling of timestamps in the decoding process.

Suggested Solution:
Review the timestamp generation logic in the c2.android.aac.decoder to ensure that timestamps are correctly calculated and that each frame's output is issued with a strictly increasing timestamp. Consider adding checks to ensure that input frames have valid timestamp metadata before decoding.

Technical Details¶

Stack Trace Signature:

java.lang.AssertionError: Output timestamps are not strictly increasing 

##################       Test Details        ####################
Test Name :- testSimpleDecode[0_c2.android.aac.decoder_audio/mp4a-latm]
Test Parameters :- [  c2.android.aac.decoder, audio/mp4a-latm, bbb_stereo_48kHz_192kbps_aac_cenc.mp4  ]
###################      Test Environment       #####################
Component under test :- c2.android.aac.decoder 
Format under test :- {max-bitrate=234125, sample-rate=48000, crypt

Affected Test Cases¶

Failure 1¶

• Module: MctsMediaDrmFrameworkTestCases
• Test Case: android.media.drmframework.cts.CodecDecoderBlockModelMultiAccessUnitDrmTest#testSimpleDecode[0_c2.android.aac.decoder_audio/mp4a-latm]
• Stack Trace:

java.lang.AssertionError: Output timestamps are not strictly increasing 

##################       Test Details        ####################
Test Name :- testSimpleDecode[0_c2.android.aac.decoder_audio/mp4a-latm]
Test Parameters :- [  c2.android.aac.decoder, audio/mp4a-latm, bbb_stereo_48kHz_192kbps_aac_cenc.mp4  ]
###################      Test Environment       #####################
Component under test :- c2.android.aac.decoder 
Format under test :- {max-bitrate=234125, sample-rate=48000, crypto-mode=1, track-id=1, mime=audio/mp4a-latm, profile=2, bitrate=192001, language=und, aac-profile=2, crypto-skip-byte-block=0, buffer-batch-max-output-size=192000, buffer-batch-threshold-output-size=48000, crypto-encrypted-byte-block=0, durationUs=15018666, channel-count=2, crypto-default-iv-size=8, 
...
(truncated)

Failure 2¶

• Module: MctsMediaDrmFrameworkTestCases
• Test Case: android.media.drmframework.cts.CodecDecoderBlockModelMultiAccessUnitDrmTest#testSimpleDecode[3_c2.android.opus.decoder_audio/opus]
• Stack Trace:

java.lang.AssertionError: Output timestamps are not strictly increasing 

##################       Test Details        ####################
Test Name :- testSimpleDecode[3_c2.android.opus.decoder_audio/opus]
Test Parameters :- [  c2.android.opus.decoder, audio/opus, bbb_stereo_48kHz_192kbps_opus_cenc.mp4  ]
###################      Test Environment       #####################
Component under test :- c2.android.opus.decoder 
Format under test :- {sample-rate=48000, crypto-mode=1, track-id=1, mime=audio/opus, language=und, crypto-skip-byte-block=0, csd-1=java.nio.HeapByteBuffer[pos=0 lim=8 cap=8], csd-2=java.nio.HeapByteBuffer[pos=0 lim=8 cap=8], buffer-batch-max-output-size=192000, buffer-batch-threshold-output-size=48000, crypto-encrypted-byte-block=0, durationUs=15000000, channel-count=2,
...
(truncated)

Failure 3¶

• Module: MctsMediaDrmFrameworkTestCases
• Test Case: android.media.drmframework.cts.CodecDecoderMultiAccessUnitDrmTest#testSimpleDecode[0_c2.android.aac.decoder_audio/mp4a-latm]
• Stack Trace:

java.lang.AssertionError: Output timestamps are not strictly increasing 

##################       Test Details        ####################
Test Name :- testSimpleDecode[0_c2.android.aac.decoder_audio/mp4a-latm]
Test Parameters :- [  c2.android.aac.decoder, audio/mp4a-latm, bbb_stereo_48kHz_192kbps_aac_cenc.mp4  ]
###################      Test Environment       #####################
Component under test :- c2.android.aac.decoder 
Format under test :- {max-bitrate=234125, sample-rate=48000, crypto-mode=1, track-id=1, mime=audio/mp4a-latm, profile=2, bitrate=192001, language=und, aac-profile=2, crypto-skip-byte-block=0, buffer-batch-max-output-size=192000, buffer-batch-threshold-output-size=48000, crypto-encrypted-byte-block=0, durationUs=15018666, channel-count=2, crypto-default-iv-size=8, 
...
(truncated)

Failure 4¶

• Module: MctsMediaDrmFrameworkTestCases
• Test Case: android.media.drmframework.cts.CodecDecoderMultiAccessUnitDrmTest#testSimpleDecode[3_c2.android.opus.decoder_audio/opus]
• Stack Trace:

java.lang.AssertionError: Output timestamps are not strictly increasing 

##################       Test Details        ####################
Test Name :- testSimpleDecode[3_c2.android.opus.decoder_audio/opus]
Test Parameters :- [  c2.android.opus.decoder, audio/opus, bbb_stereo_48kHz_192kbps_opus_cenc.mp4  ]
###################      Test Environment       #####################
Component under test :- c2.android.opus.decoder 
Format under test :- {sample-rate=48000, crypto-mode=1, track-id=1, mime=audio/opus, language=und, crypto-skip-byte-block=0, csd-1=java.nio.HeapByteBuffer[pos=0 lim=8 cap=8], csd-2=java.nio.HeapByteBuffer[pos=0 lim=8 cap=8], buffer-batch-max-output-size=192000, buffer-batch-threshold-output-size=48000, crypto-encrypted-byte-block=0, durationUs=15000000, channel-count=2,
...
(truncated)