使用Android的MediaCodec API时，我遇到间歇性的低级别崩溃。我正在处理多个（最多8个）原始AAC音频流，所以我配置了8个MediaCodec实例，然后在它们到达时提供样本缓冲区（来自单个线程，因此没有并行解码）。
这大部分工作正常，但我经常在会议开始时遇到低级别的崩溃。墓碑痕迹如下所示：
*** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
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)
在尝试诊断此问题时，我甚至从哪里开始？