[Xperia SP Original Android Development] CallMeVentus:
It might be here:

I/libcamera( 207): stopCamera: X
I/libcamera( 207): release: X
I/CameraClient( 207): Destroying camera 0
W/dalvikvm( 2656): threadid=13: thread exiting with uncaught exception (group=0x415e9b90)
E/AndroidRuntime( 2656): FATAL EXCEPTION: Camera Handler Thread
E/AndroidRuntime( 2656): Process: com.android.camera2, PID: 2656
E/AndroidRuntime( 2656): java.lang.RuntimeException: setParameters failed
E/AndroidRuntime( 2656): at android.hardware.Camera.native_setParameters(Native Method)
E/AndroidRuntime( 2656): at android.hardware.Camera.setParameters(Camera.java:1650)
E/AndroidRuntime( 2656): at com.android.camera.AndroidCameraManagerImpl$CameraHandler.handleMessage(AndroidCameraManagerImpl.java:298)
E/AndroidRuntime( 2656): at android.os.Handler.dispatchMessage(Handler.java:102)
E/AndroidRuntime( 2656): at android.os.Looper.loop(Looper.java:137)
E/AndroidRuntime( 2656): at android.os.HandlerThread.run(HandlerThread.java:61)
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x12d9958 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x12b0bd0 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x13334a8 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x12c7eb0 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1516878 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1516750 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1516610 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1516478 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1518b68 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1518ab0 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x15189e0 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x15188a0 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x15190f0 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1518fc8 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1518e88 successful
I/OMXNodeInstance( 207): OMX_FreeBuffer for buffer header 0x1518cf0 successful
W/ActivityManager( 630): Force finishing activity com.android.camera2/com.android.camera.CameraLauncher
W/NFC-LLC ( 878): LLC length mis-match
I/WindowManager( 630): Screenshot max retries 4 of Token{41f58808 ActivityRecord{423087f8 u0 com.android.camera2/com.android.camera.CameraLauncher t8 f}} appWin=Window{4248dfe0 u0 Starting com.android.camera2} drawState=4
W/WindowManager( 630): Screenshot failure taking screenshot for (720x1280) to layer 21015
I/DownloadManager( 966): Ignoring Content-Length since Transfer-Encoding is also defined
D/dalvikvm( 966): GC_FOR_ALLOC freed 631K, 21% free 9501K/11908K, paused 17ms, total 18ms
I/DownloadManager( 966): Download 39 finished with status SUCCESS
W/ActivityManager( 630): Activity pause timeout for ActivityRecord{423087f8 u0 com.android.camera2/com.android.camera.CameraLauncher t8 f}
D/dalvikvm( 630): GC_EXPLICIT freed 1454K, 22% free 15167K/19316K, paused 3ms+5ms, total 77ms
D/dalvikvm( 1241): GC_CONCURRENT freed 1970K, 16% free 10821K/12824K, paused 2ms+12ms, total 67ms
I/dalvikvm( 630): Jit: resizing JitTable from 8192 to 16384
D/dalvikvm( 966): GC_FOR_ALLOC freed 645K, 21% free 9513K/11908K, paused 13ms, total 19ms
I/DownloadManager( 966): Download 40 starting
D/dalvikvm( 966): GC_FOR_ALLOC freed 632K, 21% free 9484K/11908K, paused 12ms, total 13ms
I/DownloadManager( 966): Ignoring Content-Length since Transfer-Encoding is also defined
D/dalvikvm( 1184): GC_FOR_ALLOC freed 4603K, 18% free 26230K/31888K, paused 16ms, total 17ms
W/NFC-LLC ( 878): LLC length mis-match
D/dalvikvm( 966): GC_FOR_ALLOC freed 603K, 21% free 9488K/11908K, paused 11ms, total 12ms
I/DownloadManager( 966): Download 40 finished with status SUCCESS
I/Process ( 2656): Sending signal. PID: 2656 SIG: 9
W/InputDispatcher( 630): channel '4263a9c8 com.android.camera2/com.android.camera.CameraLauncher (server)' ~ Consumer closed input channel or an error occurred. events=0x9
E/InputDispatcher( 630): channel '4263a9c8 com.android.camera2/com.android.camera.CameraLauncher (server)' ~ Channel is unrecoverably broken and will be disposed!
W/InputDispatcher( 630): Attempted to unregister already unregistered input channel '4263a9c8 com.android.camera2/com.android.camera.CameraLauncher (server)'
I/ActivityManager( 630): Process com.android.camera2 (pid 2656) has died.
I/WindowState( 630): WIN DEATH: Window{4263a9c8 u0 com.android.camera2/com.android.camera.CameraLauncher}

From the way it looks it seems like an error on the camera sources, but whatever it is, try the basic troubleshooting steps first (a.k.a restarting, wiping data/reflash etc.).