341 Commits

Author SHA1 Message Date
Per
a3c20bb9a0 Add support for scaling textures in AndroidVideoCapturer.
The idea is to also reuse AndroidTextureBuffer::CropAndScale when scaling in the encoder.

BUG=webrtc:4993
R=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1471333003 .

Cr-Commit-Position: refs/heads/master@{#10802}
2015-11-26 12:41:52 +00:00
ivoc
b2514725a9 Add JNI interface for functions to start and stop recording AEC dumps and RTC event logs.
BUG=webrtc:4741

Review URL: https://codereview.webrtc.org/1409323009

Cr-Commit-Position: refs/heads/master@{#10776}
2015-11-24 17:00:39 +00:00
Magnus Jedvert
4c5eea3c73 Android SurfaceViewRenderer: Don't rely on widthSpec/heightSpec after onMeasure() returns
SurfaceViewRenderer currently stores widthSpec/heightSpec internally, and triggers requestLayout() from renderFrameOnRenderThread()->checkConsistentLayout() when it detects a change using widthSpec/heightSpec. This is not reliable, because onMeasure() might be called several times during the layout process negotiation. For example it might look like this:
-> onMeasure(at most 1920, at most 1080)
<- setMeasuredDimension(1080, 1080)
-> onMeasure(exactly 1080, exactly 1080)
<- setMeasuredDimension(1080, 1080)
Then we store (exactly 1080, exactly 1080) even though we are allowed to be bigger than this, and requestLayout() will never be triggered.

This CL moves the requestLayout() trigger to updateFrameDimensionsAndReportEvents() when the frame size changes.

Other small changes in this CL are:
* Replace with/height variables with Point.
* Add logging in updateFrameDimensionsAndReportEvents() even when rendererEvents is null.
* Use Math.round() in RendererCommon.getDisplaySize() instead of integer cast.

R=hbos@webrtc.org

Review URL: https://codereview.webrtc.org/1453413005 .

Cr-Commit-Position: refs/heads/master@{#10774}
2015-11-24 16:45:32 +00:00
perkj
7baf79fb9e Temporary remove spamming MediaDecoder log
This log will write for each decoded frame if the textures are rendered using VideoRenderGUI
and the the screen is locked.

TBR=glaznew@webrtc.org

Review URL: https://codereview.webrtc.org/1465093004

Cr-Commit-Position: refs/heads/master@{#10771}
2015-11-24 14:26:46 +00:00
Magnus Jedvert
4f2152e328 Android SurfaceViewRenderer: Make sure not to call eglCreateSurface() twice
eglCreateSurface() calls are posted to the render thread from both init() and surfaceCreated(). If the render thread does not process the eglCreateSurface() message from init() before surfaceCreated() is called, eglCreateSurface() will be called twice resulting in a crash.

This CL makes sure eglCreateSurface() is only called once.

BUG=b/25815604
R=hbos@webrtc.org

Review URL: https://codereview.webrtc.org/1466133002 .

Cr-Commit-Position: refs/heads/master@{#10769}
2015-11-24 12:54:36 +00:00
perkj
9237559b16 Add SurfaceTextureHelper.disconnect(Handler handler) method
This method should be used when the SurfaceTextureHelper is created to use a specific handler.
This now guarantee that the looper used by handler is destroyed after a frame has been returned.

Review URL: https://codereview.webrtc.org/1465163003

Cr-Commit-Position: refs/heads/master@{#10767}
2015-11-24 11:03:19 +00:00
Magnus Jedvert
1aa6efe885 Android ThreadUtils: Make the class public for access outside org.webrtc
Also make the class non-final. We shouldn't use non-final classes, because then we can't mock them.

R=henrika@webrtc.org

Review URL: https://codereview.webrtc.org/1470973002 .

Cr-Commit-Position: refs/heads/master@{#10757}
2015-11-23 19:13:36 +00:00
perkj
87d584597c Fix androidmediadecoder_jni TS logging.
And fix pragma warning about deprecated "webrtc/modules/video_coding/codecs/interface/video_codec_interface.h include.

Review URL: https://codereview.webrtc.org/1461273002

Cr-Commit-Position: refs/heads/master@{#10744}
2015-11-23 09:46:32 +00:00
perkj
30e918278c This cl add support to encode from textures to MediaCodecVideoEncoder.
This has also partly been reviewed in https://codereview.webrtc.org/1375953002/.

BUG=webrtc:4993
TBR=glaznew@webrtc.org

Review URL: https://codereview.webrtc.org/1403713002

Cr-Commit-Position: refs/heads/master@{#10725}
2015-11-20 09:31:32 +00:00
Alex Glaznev
17c0aff9ea Enable VP9 HW decoder on Exynos chips.
R=wzh@webrtc.org

Review URL: https://codereview.webrtc.org/1466543002 .

Cr-Commit-Position: refs/heads/master@{#10720}
2015-11-19 23:56:24 +00:00
Magnus Jedvert
ef453238aa Android: Make classes non-final
The classes are not mockable if they are final.

R=phoglund@webrtc.org

Review URL: https://codereview.webrtc.org/1459873002 .

Cr-Commit-Position: refs/heads/master@{#10714}
2015-11-19 16:54:16 +00:00
henrika
b6755ab6df Revert of Adding thread timeout for audio recorer thread in Java (patchset #2 id:20001 of https://codereview.webrtc.org/1444313002/ )
Reason for revert:
Reverting since this fix might hide real issue and the reported root problem seems extremely rare.

Original issue's description:
> Adding thread timeout for audio recorer thread in Java
>
> BUG=NONE
>
> Committed: https://crrev.com/fd614c2149c7985bd83df809df71d0d60e5a8f74
> Cr-Commit-Position: refs/heads/master@{#10671}

TBR=magjed@webrtc.org,tommi@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=NONE

Review URL: https://codereview.webrtc.org/1459123002

Cr-Commit-Position: refs/heads/master@{#10707}
2015-11-19 10:43:19 +00:00
Per
488e75f11b Patchset 1 yet again relands without modification https://codereview.webrtc.org/1422963003/
It do the following:

The SurfaceTexture.updateTexImage() calls are moved from the video renderers into MediaCodecVideoDecoder, and the destructor of the texture frames will signal MediaCodecVideoDecoder that the frame has returned. This CL also removes the SurfaceTexture from the native handle and only exposes the texture matrix instead, because only the video source should access the SurfaceTexture.
It moves the responsibility of calculating the decode time to Java.

Patchset2 Refactor MediaCodecVideoDecoder to drop frames if a texture is not released.

R=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1440343002 .

Cr-Commit-Position: refs/heads/master@{#10706}
2015-11-19 09:43:46 +00:00
kjellander@webrtc.org
b7ce96470b modules/video_coding/utility: Remove include
This makes it clearer this code not meant to be used as an API.
I could not find any use of this in downstream code.

BUG=webrtc:5095
TESTED=git cl try -c --bot=android_compile_rel --bot=linux_compile_rel --bot=win_compile_rel --bot=mac_compile_rel --bot=ios_rel --bot=linux_gn_rel --bot=win_x64_gn_rel --bot=mac_x64_gn_rel --bot=android_gn_rel -m tryserver.webrtc
R=stefan@webrtc.org
TBR=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1440873005 .

Cr-Commit-Position: refs/heads/master@{#10699}
2015-11-18 22:04:20 +00:00
Alex Glaznev
ad948c42a1 Preliminary support of VP9 HW encoder on Android.
Not fully tested yet. Verified in test loopback application
with fake VP9 codec factory.
Assume that encoder generates bitstream in non flexible mode with
one temporal and one spatial layers.

R=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1451953002 .

Cr-Commit-Position: refs/heads/master@{#10695}
2015-11-18 21:06:51 +00:00
henrika
fd614c2149 Adding thread timeout for audio recorer thread in Java
BUG=NONE

Review URL: https://codereview.webrtc.org/1444313002

Cr-Commit-Position: refs/heads/master@{#10671}
2015-11-17 12:28:33 +00:00
kjellander
6f8ce060a2 common_video: rename interface -> include
To avoid breaking downstream, the "interface" directories were copied
into a new "common_video/include" dir. The old headers got pragma
warnings added about deprecation (a very short deprecation since I plan
to remove them as soon downstream is updated).
The header guards are also identical to avoid mixing them up in the transition.

BUG=webrtc:5095
TESTED=Passing compile-trybots with --clobber flag:
git cl try --clobber --bot=win_compile_rel --bot=linux_compile_rel --bot=android_compile_rel --bot=mac_compile_rel --bot=ios_rel --bot=linux_gn_rel --bot=win_x64_gn_rel --bot=mac_x64_gn_rel --bot=android_gn_rel -m tryserver.webrtc

Review URL: https://codereview.webrtc.org/1418913006

Cr-Commit-Position: refs/heads/master@{#10659}
2015-11-16 21:52:31 +00:00
magjed
633a3aa26f ThreadUtils: Add joinUninterruptibly() with timeout
This is similar to com.google.common.util.concurrent.Uninterruptibles.joinUninterruptibly().
http://docs.guava-libraries.googlecode.com/git/javadoc/com/google/common/util/concurrent/Uninterruptibles.html#joinUninterruptibly(java.lang.Thread,%20long,%20java.util.concurrent.TimeUnit)

Review URL: https://codereview.webrtc.org/1444273002

Cr-Commit-Position: refs/heads/master@{#10651}
2015-11-16 13:12:36 +00:00
magjed
3e0f602055 Android EglBase: Add support for creating EGLSurface from Surface, not SurfaceHolder
Review URL: https://codereview.webrtc.org/1438223003

Cr-Commit-Position: refs/heads/master@{#10646}
2015-11-16 10:04:57 +00:00
magjed
4a41361f98 Android SurfaceViewRenderer: Never hold a pending frame indefinitely
The original purpose with keeping one pending frame in SurfaceViewRenderer was to reduce latency for the first rendered frame when we are waiting for the Surface to be created. However, it is very dangerous to hold a pending frame indefinitely when used with a SurfaceTexture, because the SurfaceTexture only has one frame and thus holding a frame in the renderer will freeze everything and typically cause timeout crashes.

Review URL: https://codereview.webrtc.org/1435413006

Cr-Commit-Position: refs/heads/master@{#10638}
2015-11-13 16:48:06 +00:00
Per
c01c25434b Revert of Android MediaCodecVideoDecoder: Manage lifetime of texture frames (patchset #12 id:320001 of https://codereview.webrtc.org/1422963003/ )
Reason for revert:
Causes fallback to SW decoder if a renderer is put in the background.

Original issue's description:
> Patchset 1 is a pure
> revert of "Revert of "Android MediaCodecVideoDecoder: Manage lifetime of texture frames" https://codereview.webrtc.org/1378033003/
>
> Following patchsets move the responsibility of calculating the decode time to Java.
>
> TESTED= Apprtc loopback using H264 and VP8 on N5, N6, N7, S5
>
> Committed: https://crrev.com/9cb8982e64f08d3d630bf7c3d2bcc78c10db88e2
> Cr-Commit-Position: refs/heads/master@{#10597}

TBR=magjed@webrtc.org,glaznev@webrtc.org
NOPRESUBMIT=true
NOTREECHECKS=true

Review URL: https://codereview.webrtc.org/1441363002 .

Cr-Commit-Position: refs/heads/master@{#10637}
2015-11-13 15:58:37 +00:00
Patrik Höglund
68876f990e Introduces Android API level linting, fixes all current API lint errors.
This CL attempts to annotate accesses on >16 API levels using as
small scopes as possible. The TargetApi notations mean "yes, I know
I'm accessing a higher API and I take responsibility for gating the
call on Android API level". The Encoder/Decoder classes are annotated
on the whole class, but they're only accessed through JNI; we should
annotate on method level otherwise and preferably on private methods.

This patch also fixes some compiler-level deprecation warnings (i.e.
-Xlint:deprecation), but probably not all of them.

BUG=webrtc:5063
R=henrika@webrtc.org, kjellander@webrtc.org, magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1412673008 .

Cr-Commit-Position: refs/heads/master@{#10624}
2015-11-12 16:37:01 +00:00
perkj
9576e54836 Reland "Prepare MediaCodecVideoEncoder for surface textures.""
This reverts commit 12f680214e28dc5f0a13ac8afc0d1445f89e67e6.
Original cl in https://codereview.webrtc.org/1396073003/
Prepare MediaCodecVideoEncoder for surface textures.
This refactors MediaVideoEncoder to prepare for adding support to encode from textures. The C++ layer does not have any functional changes.
- Moves ResetEncoder to always work on the codec thread
- Adds use of ThreadChecker.
- Change Java MediaEncoder.Init to return true or false and introduce method getInputBuffers.
- Add simple unit test for Java MediaCodecVideoEncoder.

The pure revert of the revert is in patchset 1.
Patchset 2, moves getting the input buffer to before storing pending timestamps etc to fix b/24984012.

BUG=webrtc:4993 b/24984012

Review URL: https://codereview.webrtc.org/1406203002

Cr-Commit-Position: refs/heads/master@{#10622}
2015-11-12 14:43:22 +00:00
magjed
fc6affc60d Android SurfaceViewRenderer: Call glClear() for every frame to avoid bad GL state
BUG=webrtc:5147

Review URL: https://codereview.webrtc.org/1436883002

Cr-Commit-Position: refs/heads/master@{#10617}
2015-11-12 09:08:37 +00:00
perkj
cbfabbf818 Fix potential tearing issue in VideoRendererGui.
This make sure that the texture copy is syncronized.

To reproduce the problem I:
Reverted "Revert of "Android MediaCodecVideoDecoder: Manage lifetime of texture frames" https://codereview.webrtc.org/1378033003/"
commit 543b6ca30a43eeb069c699291460ce6bacc7959d.
Reverted "Enable SurfaceViewRenderer for AppRTCDemo"
commit 7076729c57c27aa813760d2038be02c36f4d7649.
and ran ApprtDemo in loopback and changed the orientation a couple of times.

TBR=glaznev@webrtc.org

Review URL: https://codereview.webrtc.org/1437823002

Cr-Commit-Position: refs/heads/master@{#10598}
2015-11-11 11:38:39 +00:00
perkj
9cb8982e64 Patchset 1 is a pure
revert of "Revert of "Android MediaCodecVideoDecoder: Manage lifetime of texture frames" https://codereview.webrtc.org/1378033003/

Following patchsets move the responsibility of calculating the decode time to Java.

TESTED= Apprtc loopback using H264 and VP8 on N5, N6, N7, S5

Review URL: https://codereview.webrtc.org/1422963003

Cr-Commit-Position: refs/heads/master@{#10597}
2015-11-11 11:27:05 +00:00
magjed
b2d1c5026d SurfaceViewRenderer: Add resource name to log outputs and exceptions
Add resource name to log outputs to distinguish local renderer from remote renderer.

This Cl also adds some thread checks and factors out a small helper function makeBlack().

Review URL: https://codereview.webrtc.org/1420203003

Cr-Commit-Position: refs/heads/master@{#10596}
2015-11-11 11:06:49 +00:00
Alex Glaznev
69a7fd5047 Support VP9 HW video decoding on Android.
Preliminary verification is done for OMX.google.vp9.decoder codec.

R=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1416023005 .

Cr-Commit-Position: refs/heads/master@{#10586}
2015-11-10 18:25:59 +00:00
perkj
83dfad6853 VideoCapturerAndroid: Changed camera freeze check to check that all frames are pending before reporting a client error.
BUG=b/25514149

Review URL: https://codereview.webrtc.org/1423073006

Cr-Commit-Position: refs/heads/master@{#10563}
2015-11-09 15:39:55 +00:00
perkj
89ef6cc13e Attempt to open Android camera later if it is already in use.
This change VideoCapturerAndroid to attempt 3 times with a period of 300ms to open the camera if it fails.
This is so that if another application have it already opened, it would have more time to release it.
BUG=b/25190234

Review URL: https://codereview.webrtc.org/1422023007

Cr-Commit-Position: refs/heads/master@{#10559}
2015-11-09 09:35:26 +00:00
magjed
1ebf8ba368 SurfaceViewRenderer: Drop old frames instead of new frames
If SurfaceViewRenderer can't keep up with the stream of incoming frames it has to drop frames. Currently, new frames are dropped until the old pending frame is rendered. This CL drops the old pending frame instead.

Review URL: https://codereview.webrtc.org/1417063005

Cr-Commit-Position: refs/heads/master@{#10558}
2015-11-09 08:41:55 +00:00
perkj
3bfef44a4d Changed timeout to 6s for reporting android camera freeze.
Also distinguish between camera failures and failures due to that buffers has not been returned.
Adds unit tests for making sure CameraEventHandler.onError is triggered if frames are not returned.

BUG=b/25514149

Review URL: https://codereview.webrtc.org/1415013006

Cr-Commit-Position: refs/heads/master@{#10555}
2015-11-08 14:58:22 +00:00
noahric
23725e09c6 Remove ICU usage from jni_helpers.cc.
JNI already has jstring<->UTF8 string conversion, so using that should
save ~1mb off android binaries (ICU is *large*), probably around
300-400k after compression.

BUG=

Review URL: https://codereview.webrtc.org/1430023005

Cr-Commit-Position: refs/heads/master@{#10545}
2015-11-06 21:56:11 +00:00
Honghai Zhang
5a846c086b Make ConnectionType public in order to add java NetworkObserver.
BUG=
R=glaznev@webrtc.org, jiayl@google.com

Review URL: https://codereview.webrtc.org/1429053002 .

Cr-Commit-Position: refs/heads/master@{#10485}
2015-11-02 19:33:30 +00:00
Alex Glaznev
5c3da4b6e9 Call MediaCodec.stop() on separate thread.
MediaCodec.stop() call may hang in some rear cases. To avoid
application hang this call need to be done on separate thread and
possible error reported back to application.
Application may elect to continue executing and use another codec
instance for encoding/decoding or stop the call and exit.

BUG=b/24339249
R=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1425143005 .

Cr-Commit-Position: refs/heads/master@{#10467}
2015-10-30 22:31:25 +00:00
asapersson
075fb4bfea MediaCodecVideoEncoder: Add number of quality resolution downscales to Encoded callback.
BUG=

Review URL: https://codereview.webrtc.org/1426033002

Cr-Commit-Position: refs/heads/master@{#10453}
2015-10-29 15:49:21 +00:00
glaznev
e55c42c13e Remove limitation on the amount of maximum pending HW decoder inputs.
Plus log first few decoder frames in and out events.

BUG=b/25287910

Review URL: https://codereview.webrtc.org/1423843005

Cr-Commit-Position: refs/heads/master@{#10439}
2015-10-28 17:30:38 +00:00
Henrik Kjellander
98f53510b2 system_wrappers: rename interface -> include
BUG=webrtc:5095
R=tommi@webrtc.org

Review URL: https://codereview.webrtc.org/1413333002 .

Cr-Commit-Position: refs/heads/master@{#10438}
2015-10-28 17:17:50 +00:00
magjed
83585c9075 VideoCapturerAndroid: More frequent and verbose logging
BUG=b/24437529

Review URL: https://codereview.webrtc.org/1417633007

Cr-Commit-Position: refs/heads/master@{#10434}
2015-10-28 10:27:30 +00:00
magjed
401fb0648a SurfaceTextureHelper: Remove use of quitSafely() because it's API lvl 18
There is no reason to not just quit() in release().

Review URL: https://codereview.webrtc.org/1418563005

Cr-Commit-Position: refs/heads/master@{#10394}
2015-10-24 01:17:59 +00:00
magjed
238b15d543 SurfaceViewRenderer: Remove use of quitSafely() because it's API lvl 18
I replaced quitSafely() with a CountDownLatch. The reason for not using ThreadUtils.invokeUninterruptibly() is that I want to stop accepting frames asap, and invokeUninterruptibly() would still accept frames during the waiting time.

BUG=webrtc:4742

Review URL: https://codereview.webrtc.org/1418223002

Cr-Commit-Position: refs/heads/master@{#10393}
2015-10-24 01:14:33 +00:00
magjed
c3402fc3ef EGL10.eglCreateWindowSurface(): Replace Surface input with SurfaceHolder
Sending a Surface as input to EGL10.eglCreateWindowSurface() is not supported everywhere. See this code as reference:
ae9610220b/opengl/tools/glgen/stubs/egl/eglCreateWindowSurface.java (42)

Sending a SurfaceHolder as input instead should hopefully be supported everywhere, and this is also what GlSurfaceView does:
http://grepcode.com/file/repository.grepcode.com/java/ext/com.google.android/android/5.1.1_r1/android/opengl/GLSurfaceView.java#1076

Review URL: https://codereview.webrtc.org/1416213004

Cr-Commit-Position: refs/heads/master@{#10392}
2015-10-24 01:13:20 +00:00
Peter Boström
49e196af40 Remove VideoFrameType aliases for FrameType.
No longer used in Chromium, so these can now be removed.

BUG=webrtc:5042
R=mflodman@webrtc.org
TBR=magjed@webrtc.org

Review URL: https://codereview.webrtc.org/1415693002 .

Cr-Commit-Position: refs/heads/master@{#10390}
2015-10-23 13:58:27 +00:00
magjed
8c425aa8f6 Android: Replace EGL14 with EGL10
The purpose with this change is to support older API levels by replacing EGL14 (API lvl 17) with EGL10 (API lvl 1). The main purpose is to lower API lvl requirement for SurfaceViewRenderer from API lvl 17 to API lvl 15. Also, camera texture capture will work on API lvl < 17 (and texture encode/decode in MediaCodec, but we don't use MediaCodec below API lvl 18?).

GLSurfaceView/VideoRendererGui is already using EGL10.

EGL 1.1 - 1.4 added new functionality, but won't affect performance. We don't need the functionality, so there should be no reason to not use EGL 1.0.

I have profiled AppRTCDemo with Qualcomm Trepn Profiler on a Nexus 5 and Nexus 6 and couldn't see any difference.

Specifically, this CL:
 * Update EglBase to use EGL10 instead of EGL14.
 * Update imports from EGL14 to EGL10 in a lot of files (plus changing import order in some cases).
 * Update VideoCapturerAndroid to always support texture capture.

Review URL: https://codereview.webrtc.org/1396013004

Cr-Commit-Position: refs/heads/master@{#10378}
2015-10-22 23:52:45 +00:00
asapersson
86b016027d Add stats for average QP per frame for VP8 (for received video streams):
"WebRTC.Video.Decoded.VP8.Qp"

BUG=chromium:512752

Review URL: https://codereview.webrtc.org/1340623002

Cr-Commit-Position: refs/heads/master@{#10349}
2015-10-21 06:55:32 +00:00
olka
30a5b5e9fb passing |buffer| by reference in AndroidVideoCapturer::OnIncomingFrame
BUG=webrtc:5062

Review URL: https://codereview.webrtc.org/1414703002

Cr-Commit-Position: refs/heads/master@{#10342}
2015-10-20 18:05:02 +00:00
Alex Glaznev
c6aec4b8ed Fix HW video codec stack traces reporting.
Print stack traces for active instance only.
Also add Nexus 4 to H.264 encoder blacklist.

R=wzh@webrtc.org

Review URL: https://codereview.webrtc.org/1412833004 .

Cr-Commit-Position: refs/heads/master@{#10329}
2015-10-19 23:39:33 +00:00
honghaiz
023f3ef029 Create network change notifier and pass the event to NetworkManager
BUG=

Review URL: https://codereview.webrtc.org/1391703003

Cr-Commit-Position: refs/heads/master@{#10325}
2015-10-19 16:39:38 +00:00
pbos
22993e1a0c Unify FrameType and VideoFrameType.
Prevents some heap allocation and frame-type conversion since interfaces
mismatch. Also it's less confusing to have one type for this.

BUG=webrtc:5042
R=magjed@webrtc.org, mflodman@webrtc.org, henrik.lundin@webrtc.org, solenberg@webrtc.org, stefan@webrtc.org

Review URL: https://codereview.webrtc.org/1371043003

Cr-Commit-Position: refs/heads/master@{#10320}
2015-10-19 09:39:15 +00:00
Alex Glaznev
9781152e04 Add new Android camera events.
Add events to track when camera is requested to open,
when first camera frame is available and when camera is
closed.

BUG=b/24271359
R=perkj@webrtc.org

Review URL: https://codereview.webrtc.org/1398793005 .

Cr-Commit-Position: refs/heads/master@{#10306}
2015-10-16 20:10:24 +00:00