我正在开发一个用于Android的Delphi 10 Seattle中的应用程序，它从TCameraComponent获取图像并使用TIdUDPServer发送给另一个设备。我创建了一个线程来处理TIdUDPServer并发送图像和其他文本命令。 它以这种方式工作： 主线程在线程内部进行位图写入，然后线程发送。
问题是App每5或4分钟发生一次Fatal Signal 6错误，我认为它与访问同一个对象的线程有关，我尝试过使用TCriticalSection来保护对象，但我仍然得到错误。
这是主线程的代码
procedure TFormMain.CameraComponent1SampleBufferReady(Sender: TObject;
const ATime: TMediaTime);
var
Bitm: TBitmap;
begin
try
Bitm:= TBitmap.Create;
CameraComponent1.SampleBufferToBitmap(Bitm, True);
BabyImag.Bitmap.Assign(Bitm);
Log.d('DBBaby', nil, 'Image on Screen');
if SendVideo then
FCommThread.SetGetImage(Bitm, True);
finally
Bitm.Free;
Bitm:= nil;
end;
end;
这是发送图像的线程的部分代码
type
TComThread = class(TThread)
private
{ Some code }
CriticalX: TCriticalSection;
public
Constructor Create(UserType: Integer);
{ Some code }
function SetGetImage(ImageBitmap: TBitmap; SetOrGet: Boolean): TBitmap;
protected
procedure Execute; override;
end;
implementation
constructor TComThread.Create(UserType: Integer);
begin
inherited Create (True);
FreeOnTerminate := True;
{ Some code }
CriticalX:= TCriticalSection.Create;
FImage:= TBitmap.Create;
end;
procedure TComThread.Execute;
var
BitmSurface: TBitmapSurface;
ToJPEG: TBitmapCodecManager;
quality: TBitmapCodecSaveParams;
CameraImg: TMemoryStream;
begin
while SendBabyVideo do
begin
try
if Assigned(FImage) then
begin
try
CameraImg:= TMemoryStream.Create();
BitmSurface:= TBitmapSurface.Create;
ToJPEG:= TBitmapCodecManager.Create;
quality.Quality:= 50;
//BitmSurface.Assign(FImage);
BitmSurface.Assign(SetGetImage(nil, False));
Log.d('DBBaby', nil, 'SurfWidth ' + IntToStr(BitmSurface.Width));
if (BitmSurface.Width > 0) AND (BitmSurface.Height > 0) then
begin
// Image stream ready
ToJPEG.SaveToStream(CameraImg, BitmSurface, '.jpg', @quality);
CamSize:= CameraImg.Size;
SetLength(bffrImg, CamSize+8);
bffrImg[0]:= $FF;
bffrImg[1]:= $FF;
bffrImg[2]:= $16;
bffrImg[3]:= $09;
bffrImg[4]:= byte(CamSize);
bffrImg[5]:= byte(CamSize shr 8);
bffrImg[6]:= byte(CamSize shr 16);
bffrImg[7]:= byte(CamSize shr 24);
CameraImg.Position:= 0;
CameraImg.Read(bffrImg[8], CamSize);
Log.d('DBBaby', nil, 'Imagem total: '+IntToStr(Length(bffrImg)));
end;
finally
BitmSurface.Free;
BitmSurface:= nil;
ToJPEG.Free;
ToJPEG:= nil;
CameraImg.Free;
CameraImg:= nil;
end;
end;
except
on E: Exception do
begin
Log.d('DBBaby', nil, '------------------------ GET STREAM');
Log.d('DBBaby', nil, E.message);
end;
end;
try
if (PeerIP <> '') AND (PeerIP <> '255.255.255.255') then
begin
if (bffr <> nil) AND (bffrImg <> nil) then
begin
FUDPBABY.SendBuffer(PeerIP, PeerPort, TIdIPVersion.Id_IPv4, bffr);
FUDPBABY.SendBuffer(PeerIP, PeerPort, TIdIPVersion.Id_IPv4, bffrImg);
end;
except
on E: Exception do
begin
Log.d('DBBaby', nil, '------------------------ SEND STREAM');
Log.d('DBBaby', nil, E.message);
end;
end;
end;
end;
function TComThread.SetGetImage(ImageBitmap: TBitmap; SetOrGet: Boolean): TBitmap;
begin
CriticalX.Enter;
try
if SetOrGet then
begin
Self.FImage.Assign(ImageBitmap);
Result:= nil;
end
else
begin
Result:= Self.FImage;
end;
finally
CriticalX.Leave;
end;
end;
我使用的是Moto E Android 6.0，NDK是r11b。在SDK Manager中，我将所有配置设置为API 23。
这是Log。
04-05 17:00:28.743 27591-27591/com.Test2.Project2 D/skia: onFlyCompress
04-05 17:00:28.780 27591-27611/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Image on Screen
04-05 17:00:28.807 27591-27591/com.Test2.Project2 D/skia: onFlyCompress
04-05 17:00:28.818 27591-28475/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): SurfWidth 144
04-05 17:00:28.822 27591-28475/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Imagem total: 1946
04-05 17:00:28.846 27591-27611/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Image on Screen
04-05 17:00:28.876 27591-27591/com.Test2.Project2 D/skia: onFlyCompress
04-05 17:00:28.912 27591-27611/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Image on Screen
04-05 17:00:28.942 27591-27591/com.Test2.Project2 D/skia: onFlyCompress
04-05 17:00:28.978 27591-27611/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Image on Screen
04-05 17:00:29.008 27591-28475/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): SurfWidth 144
04-05 17:00:29.012 27591-27591/com.Test2.Project2 D/skia: onFlyCompress
04-05 17:00:29.015 27591-28475/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Imagem total: 1943
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] JNI DETECTED ERROR IN APPLICATION: use of invalid jobject 0xb9f7a0b0
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] from java.lang.Object com.embarcadero.rtl.ProxyInterface.dispatchToNative(java.lang.String, java.lang.Object[], long)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] "main" prio=5 tid=1 Runnable
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | group="main" sCount=0 dsCount=0 obj=0x73f5af98 self=0xb70f0c60
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | sysTid=27591 nice=0 cgrp=default sched=0/0 handle=0xb6f94b34
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | state=R schedstat=( 46379176934 4119603860 17774 ) utm=4206 stm=431 core=0 HZ=100
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | stack=0xbe418000-0xbe41a000 stackSize=8MB
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | held mutexes= "mutator lock"(shared held)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #00 pc 0035c6d5 /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::ArtMethod*, void*)+116)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #01 pc 0033d7cf /system/lib/libart.so (art::Thread::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+138)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #02 pc 0024f6a1 /system/lib/libart.so (art::JavaVMExt::JniAbort(char const*, char const*)+760)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #03 pc 0024fda9 /system/lib/libart.so (art::JavaVMExt::JniAbortF(char const*, char const*, ...)+68)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #04 pc 0033e32b /system/lib/libart.so (art::Thread::DecodeJObject(_jobject*) const+174)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #05 pc 000fff55 /system/lib/libart.so (art::ScopedCheck::Check(art::ScopedObjectAccess&, bool, char const*, art::JniValueType*) (.constprop.95)+900)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #06 pc 0010e193 /system/lib/libart.so (art::CheckJNI::CallMethodA(char const*, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, jvalue*, art::Primitive::Type, art::InvokeType)+498)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #07 pc 0010ed57 /system/lib/libart.so (art::CheckJNI::CallIntMethodA(_JNIEnv*, _jobject*, _jmethodID*, jvalue*)+30)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #08 pc 006913e5 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (ExecJNI+884)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #09 pc 01135073 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #10 pc 01141607 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #11 pc 010b047f /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #12 pc 010ab189 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #13 pc 01135021 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #14 pc 005d9d5f /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #15 pc 005cde87 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #16 pc 005cf035 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #17 pc 005ac013 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #18 pc 006a10bf /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #19 pc 000aca1b /data/app/com.Test2.Project2-2/oat/arm/base.odex (java.lang.Object com.embarcadero.rtl.ProxyInterface.dispatchToNative(java.lang.String, java.lang.Object[], long)+134)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #20 pc 000acadb /data/app/com.Test2.Project2-2/oat/arm/base.odex (java.lang.Object com.embarcadero.rtl.ProxyInterface.invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])+118)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #21 pc 0029879d /system/framework/arm/boot.oat (???)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.embarcadero.rtl.ProxyInterface.dispatchToNative(Native method)
04-05 17:00:29.163 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.embarcadero.rtl.ProxyInterface.invoke(ProxyInterface.java:21)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at java.lang.reflect.Proxy.invoke(Proxy.java:393)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.hardware.Camera$PreviewCallback.onPreviewFrame(Camera.java:-2)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1129)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.os.Handler.dispatchMessage(Handler.java:102)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.os.Looper.loop(Looper.java:148)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.app.ActivityThread.main(ActivityThread.java:5443)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at java.lang.reflect.Method.invoke!(Native method)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-05 17:00:29.165 27591-27591/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410]
04-05 17:00:29.501 27591-27591/com.Test2.Project2 A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 27591
任何帮助都将不胜感激。
我已尝试过该代码，但仍然会收到致命信号6 见日志：
04-06 08:24:12.660 18999-19023/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Image on Screen
04-06 08:24:12.712 18999-18999/com.Test2.Project2 D/skia: onFlyCompress
04-06 08:24:12.726 18999-19023/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Image on Screen
04-06 08:24:12.778 18999-18999/com.Test2.Project2 D/skia: onFlyCompress
04-06 08:24:12.779 18999-20099/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): SurfWidth 144
04-06 08:24:12.784 18999-20099/com.Test2.Project2 I/info: FMX: Project2: DBBaby (Nil): Imagem total: 2984
04-06 08:24:12.785 18999-18999/com.Test2.Project2 E/art: JNI ERROR (app bug): accessed stale global reference 0x203776 (index 3549 in a table of size 3546)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] JNI DETECTED ERROR IN APPLICATION: use of deleted global reference 0x203776
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] from java.lang.Object com.embarcadero.rtl.ProxyInterface.dispatchToNative(java.lang.String, java.lang.Object[], long)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] "main" prio=5 tid=1 Runnable
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | group="main" sCount=0 dsCount=0 obj=0x73f5af98 self=0xb70f0c60
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | sysTid=18999 nice=0 cgrp=default sched=0/0 handle=0xb6f94b34
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | state=R schedstat=( 5347038051 485186867 2088 ) utm=480 stm=54 core=3 HZ=100
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | stack=0xbe418000-0xbe41a000 stackSize=8MB
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] | held mutexes= "mutator lock"(shared held)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #00 pc 0035c6d5 /system/lib/libart.so (art::DumpNativeStack(std::__1::basic_ostream<char, std::__1::char_traits<char> >&, int, char const*, art::ArtMethod*, void*)+116)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #01 pc 0033d7cf /system/lib/libart.so (art::Thread::Dump(std::__1::basic_ostream<char, std::__1::char_traits<char> >&) const+138)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #02 pc 0024f6a1 /system/lib/libart.so (art::JavaVMExt::JniAbort(char const*, char const*)+760)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #03 pc 0024fda9 /system/lib/libart.so (art::JavaVMExt::JniAbortF(char const*, char const*, ...)+68)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #04 pc 0033e52b /system/lib/libart.so (art::Thread::DecodeJObject(_jobject*) const+686)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #05 pc 000fff55 /system/lib/libart.so (art::ScopedCheck::Check(art::ScopedObjectAccess&, bool, char const*, art::JniValueType*) (.constprop.95)+900)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #06 pc 0010e193 /system/lib/libart.so (art::CheckJNI::CallMethodA(char const*, _JNIEnv*, _jobject*, _jclass*, _jmethodID*, jvalue*, art::Primitive::Type, art::InvokeType)+498)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #07 pc 0010ee41 /system/lib/libart.so (art::CheckJNI::CallObjectMethodA(_JNIEnv*, _jobject*, _jmethodID*, jvalue*)+28)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #08 pc 00691773 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (ExecJNI+1826)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #09 pc 0113503b /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #10 pc 011415d7 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #11 pc 010b0451 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #12 pc 010ab169 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #13 pc 01134fe9 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #14 pc 005d9d3f /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #15 pc 005cde67 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #16 pc 005cf015 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #17 pc 005abff3 /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #18 pc 006a109f /data/app/com.Test2.Project2-2/lib/arm/libProject2.so (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #19 pc 000aca1b /data/app/com.Test2.Project2-2/oat/arm/base.odex (java.lang.Object com.embarcadero.rtl.ProxyInterface.dispatchToNative(java.lang.String, java.lang.Object[], long)+134)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #20 pc 000acadb /data/app/com.Test2.Project2-2/oat/arm/base.odex (java.lang.Object com.embarcadero.rtl.ProxyInterface.invoke(java.lang.Object, java.lang.reflect.Method, java.lang.Object[])+118)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] native: #21 pc 0029879d /system/framework/arm/boot.oat (???)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.embarcadero.rtl.ProxyInterface.dispatchToNative(Native method)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.embarcadero.rtl.ProxyInterface.invoke(ProxyInterface.java:21)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at java.lang.reflect.Proxy.invoke(Proxy.java:393)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.hardware.Camera$PreviewCallback.onPreviewFrame(Camera.java:-2)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.hardware.Camera$EventHandler.handleMessage(Camera.java:1129)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.os.Handler.dispatchMessage(Handler.java:102)
04-06 08:24:12.839 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.os.Looper.loop(Looper.java:148)
04-06 08:24:12.840 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at android.app.ActivityThread.main(ActivityThread.java:5443)
04-06 08:24:12.840 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at java.lang.reflect.Method.invoke!(Native method)
04-06 08:24:12.840 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:728)
04-06 08:24:12.840 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410] at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618)
04-06 08:24:12.840 18999-18999/com.Test2.Project2 A/art: art/runtime/java_vm_ext.cc:410]
04-06 08:24:12.840 18999-19006/com.Test2.Project2 W/art: Suspending all threads took: 38.697ms
04-06 08:24:13.103 18999-18999/com.Test2.Project2 A/art: art/runtime/runtime.cc:399] Runtime aborting...
04-06 08:24:13.103 18999-18999/com.Test2.Project2 A/art: art/runtime/runtime.cc:399] Aborting thread:
04-06 08:24:13.107 18999-18999/com.Test2.Project2 A/libc: Fatal signal 6 (SIGABRT), code -6 in tid 18999
答案 0 :(得分：2)
您没有充分保护线程的FBitmap对象。
当线程调用SetGetImage(nil, False)时，TCriticalSection会被锁定，然后在SetGetImage()退出之前解锁，因此FBitmap的访问权限不会被Assign()锁定转到BitmSurface。这意味着主线程可以修改FBitmap，而BitmSurface仍在忙于复制它。
尝试更像这样的东西：
procedure TFormMain.CameraComponent1SampleBufferReady(Sender: TObject;
const ATime: TMediaTime);
begin
CameraComponent1.SampleBufferToBitmap(BabyImag.Bitmap, True);
Log.d('DBBaby', nil, 'Image on Screen');
if SendVideo then
FCommThread.SetImage(BabyImag.Bitmap);
end;
type
TComThread = class(TThread)
private
{ Some code }
procedure GetImage(ASurface: TBitmapSurface);
protected
procedure Execute; override;
public
Constructor Create(UserType: Integer);
{ Some code }
function SetImage(AImage: TBitmap);
end;
implementation
constructor TComThread.Create(UserType: Integer);
begin
inherited Create(True);
{ Some code }
FImage := TBitmap.Create;
end;
procedure TComThread.Execute;
var
BitmSurface: TBitmapSurface;
ToJPEG: TBitmapCodecManager;
quality: TBitmapCodecSaveParams;
CameraImg: TMemoryStream;
begin
BitmSurface := TBitmapSurface.Create;
ToJPEG := TBitmapCodecManager.Create;
quality.Quality := 50;
try
while SendBabyVideo do
begin
try
GetImage(BitmSurface);
Log.d('DBBaby', nil, 'SurfWidth ' + IntToStr(BitmSurface.Width));
if (BitmSurface.Width > 0) and (BitmSurface.Height > 0) then
begin
// Image stream ready
CameraImg.Clear;
try
ToJPEG.SaveToStream(CameraImg, BitmSurface, '.jpg', @quality);
CamSize := CameraImg.Size;
SetLength(bffrImg, CamSize+8);
bffrImg[0] := $FF;
bffrImg[1] := $FF;
bffrImg[2] := $16;
bffrImg[3] := $09;
bffrImg[4] := byte(CamSize);
bffrImg[5] := byte(CamSize shr 8);
bffrImg[6]:= byte(CamSize shr 16);
bffrImg[7]:= byte(CamSize shr 24);
CameraImg.Position := 0;
CameraImg.ReadBuffer(bffrImg[8], CamSize);
finally
CameraImg.Clear;
end;
Log.d('DBBaby', nil, 'Imagem total: '+IntToStr(Length(bffrImg)));
end;
except
on E: Exception do
begin
Log.d('DBBaby', nil, '------------------------ GET STREAM');
Log.d('DBBaby', nil, E.Message);
end;
end;
try
if (PeerIP <> '') and (PeerIP <> '255.255.255.255') and
(bffr <> nil) and (bffrImg <> nil) then
begin
FUDPBABY.SendBuffer(PeerIP, PeerPort, TIdIPVersion.Id_IPv4, bffr);
FUDPBABY.SendBuffer(PeerIP, PeerPort, TIdIPVersion.Id_IPv4, bffrImg);
end;
except
on E: Exception do
begin
Log.d('DBBaby', nil, '------------------------ SEND STREAM');
Log.d('DBBaby', nil, E.Message);
end;
end;
end;
finally
CameraImg.Free;
ToJPEG.Free;
BitmSurface.Free;
end;
end;
procedure TComThread.GetImage(ASurface: TBitmapSurface);
begin
TMonitor.Enter(FImage);
try
ASurface.Assign(FImage);
finally
TMonitor.Exit(FImage);
end;
end;
procedure TComThread.SetImage(AImage: TBitmap);
begin
TMonitor.Enter(FImage);
try
FImage.Assign(AImage);
finally
TMonitor.Exit(FImage);
end;
end;