使用Android的MediaCodec API時出現間歇性低級別崩潰。我正在處理多個(最多8個)原始AAC音頻流,因此我配置了8個MediaCodec實例,然後在它們到達時向它們提供樣本緩衝區(來自單個線程,因此沒有並行解碼)。使用MediaCodec(AAC解碼)時libstagefright_soft_aacdec.so中的間歇性本機故障
這大部分工作正常,但每隔一段時間我會在會話開始時發生低級別的崩潰。墓碑跟蹤如下所示:
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
Build fingerprint: 'google/hammerhead/hammerhead:6.0/MRA58K/2256973:user/release-keys'
Revision: '0'
ABI: 'arm'
pid: 32229, tid: 5451, name: gle.aac.decoder >>> com.wizix.gridme <<<
signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x4c
r0 00007fff r1 000002fc r2 0000004c r3 0000000d
r4 00000010 r5 0000004c r6 97adfc54 r7 0000000d
r8 97ae0014 r9 00000001 sl 94a8c020 fp 97adf5b8
ip 99c0ef08 sp 9422acd4 lr 000000f0 pc 99bf8cc0 cpsr 800f0030
d0 0000000000000000 d1 0000000000000000
d2 0000000000000000 d3 0000000000000000
d4 fff9fff8fff70001 d5 fffdfffbfffafff7
d6 fffdfffa00010003 d7 fff0fffb00040003
d8 0000000000000000 d9 0000000000000000
d10 0000000000000000 d11 0000000000000000
d12 0000000000000000 d13 0000000000000000
d14 0000000000000000 d15 0000000000000000
d16 0000000000000000 d17 0000000000000000
d18 0000000000000000 d19 0000000000000000
d20 3f80000000000000 d21 0000000000000000
d22 000000003f800000 d23 0000000000000000
d24 bf56c16c16c15177 d25 3e21ee9ebdb4b1c4
d26 392f1976b7ed8fc0 d27 b94377ce858a5d48
d28 35e127004971adb1 d29 b94377ce858a5d48
d30 3ff0000000000000 d31 3ba3198a2e000000
scr 60000013
backtrace:
#00 pc 00028cc0 /system/lib/libstagefright_soft_aacdec.so (maxSubbandSample(long**, long**, int, int, int, int)+85)
#01 pc 0002a205 /system/lib/libstagefright_soft_aacdec.so (calculateSbrEnvelope(QMF_SCALE_FACTOR*, SBR_CALCULATE_ENVELOPE*, SBR_HEADER_DATA*, SBR_FRAME_DATA*, long**, long**, int, long*, unsigned int, int)+2644)
#02 pc 000243a5 /system/lib/libstagefright_soft_aacdec.so (sbr_dec(SBR_DEC*, short*, short*, SBR_DEC*, short*, int, int, SBR_HEADER_DATA*, SBR_FRAME_DATA*, SBR_PREV_FRAME_DATA*, int, PS_DEC*, unsigned int)+632)
#03 pc 00015a4d /system/lib/libstagefright_soft_aacdec.so (sbrDecoder_Apply+740)
#04 pc 0000ff8b /system/lib/libstagefright_soft_aacdec.so (aacDecoder_DecodeFrame+610)
#05 pc 0000ef15 /system/lib/libstagefright_soft_aacdec.so (android::SoftAAC2::onQueueFilled(unsigned int)+860)
#06 pc 000224df /system/lib/libstagefright_omx.so (android::SimpleSoftOMXComponent::onMessageReceived(android::sp<android::AMessage> const&)+242)
#07 pc 000233d3 /system/lib/libstagefright_omx.so
#08 pc 0000b2c9 /system/lib/libstagefright_foundation.so (android::AHandler::deliverMessage(android::sp<android::AMessage> const&)+16)
#09 pc 0000d253 /system/lib/libstagefright_foundation.so (android::AMessage::deliver()+54)
#10 pc 0000bcb7 /system/lib/libstagefright_foundation.so (android::ALooper::loop()+222)
#11 pc 0001006d /system/lib/libutils.so (android::Thread::_threadLoop(void*)+112)
#12 pc 0003f3e7 /system/lib/libc.so (__pthread_start(void*)+30)
#13 pc 00019b43 /system/lib/libc.so (__start_thread+6)
從哪裏開始嘗試診斷此問題?
,因爲它是深崩潰內libstagefright - 可能是一個空指針引用 - 發佈您的崩盤http://b.android.com/將是適當的。 – fadden
在那個地方崩潰也_could_是AAC解碼錯誤,其中,一個特定的比特流可能會崩潰解碼器的標誌。您可以登錄/甩了你送入獨立解碼器的數據包,並試圖在同一數據包與實例化一個單獨的解碼器,即送入崩潰的解碼器實例再次解碼重現崩潰? – mstorsjo