Commit Graph

71 Commits

Author SHA1 Message Date
shengyu
9dadc06e64 remove redundant semicolons 2021-10-27 20:19:05 +08:00
Maxim Pashchenkov
05f1939b02
Merge pull request #20298 from mpashchenkov:mp/python-desync
G-API: Python. Desync.

* Desync. GMat.

* Alignment
2021-07-01 19:06:35 +00:00
Sergey Ivanov
e461031d40
Merge pull request #20184 from sivanov-work:fix_gapi_empty_input
G-API: Add standalone fix for graph empty input

* Add sandalone fix for graph empty input

* Apply some review comments

* Fix whitespace

* Apply review comment: make Mat check more deeper

* Apply some comments

* Remove tracer apply exception throwing

* Apply comments: move validatio into gproto_priv.hpp

* Apply minor text correction

* Fix alignment, remove try-catch
2021-06-10 14:05:46 +03:00
Anastasiya Pronina
3a49ff9e72 Added ITT traces to GStreamingExecutor 2021-05-11 12:52:47 +03:00
Anatoliy Talamanov
eb82ba36a3
Merge pull request #19322 from TolyaTalamanov:at/python-callbacks
[G-API] Introduce cv.gin/cv.descr_of for python

* Implement cv.gin/cv.descr_of

* Fix macos build

* Fix gcomputation tests

* Add test

* Add using to a void exceeded length for windows build

* Add using to a void exceeded length for windows build

* Fix comments to review

* Fix comments to review

* Update from latest master

* Avoid graph compilation to obtain in/out info

* Fix indentation

* Fix comments to review

* Avoid using default in switches

* Post output meta for giebackend
2021-03-01 15:52:11 +00:00
Alexander Alekhin
49127b6a26 Merge pull request #19331 from alalek:gapi_lazy_initialization_kernel_intrinsics 2021-01-17 19:20:18 +00:00
Alexander Alekhin
10ef76905c gapi: avoid global static initializers
- use lazy on-demand initialization
2021-01-15 17:22:03 +00:00
Alexander Alekhin
5202186681 Merge pull request #19050 from anton-potapov:fix_range_var_clang_warnings 2021-01-14 10:44:42 +00:00
Anatoliy Talamanov
244511e434
Merge pull request #19205 from TolyaTalamanov:at/remove-streamingbackend-export
[G-API] Fix streaming kernels in standalone

* Move streaming kernels from public header

* Add streaming backend to standalone
2020-12-24 16:46:10 +00:00
Ruslan Garnov
f7cab121fe
Merge pull request #19112 from rgarnov:rg/generic_copy_kernel
Generic copy kernel

* Moved RMat wrapping of cv::Mats to StreamingInput

* Generalized GCopy kernel

* Generic GCopy kernel: applied review comments
2020-12-16 11:18:08 +00:00
Anatoliy Talamanov
8ed0fc6f0c
Merge pull request #19009 from TolyaTalamanov:at/media-frame-copy
[G-API] GStreamingBackend

* Snapshot

* Implement StreamingBackend

* Refactoring

* Refactoring 2

* Clean up

* Add missing functionality to support MediaFrame as output

* Partially address review comments

* Fix build

* Implement reshape for gstreamingbackend and add a test on it

* Address more comments

* Add format.hpp to gapi.hpp

* Fix debug build

* Address review comments

Co-authored-by: Smirnov Alexey <alexey.smirnov@intel.com>
2020-12-11 16:29:34 +00:00
Anton Potapov
da5bfefc78 GAPI: fix Clang warning for dangling references in for loop variable 2020-12-08 14:18:46 +03:00
Anatoliy Talamanov
7521f207b1
Merge pull request #18762 from TolyaTalamanov:at/support-garray
[G-API] Wrap GArray

* Wrap GArray for output

* Collect in/out info in graph

* Add imgproc tests

* Add cv::Point2f

* Update test_gapi_imgproc.py

* Fix comments to review
2020-11-27 17:39:46 +00:00
Dmitry Matveev
b866d0dc38
Merge pull request #18793 from dmatveev:dm/in_graph_metadata
G-API: Introduce runtime in-graph metadata

* G-API: In-graph metadata -- initial implementation

* G-API: Finish the in-graph metadata implementation for Streaming

* G-API: Fix standalone build & warnings for in-graph metadata

* G-API: In-graph meta -- fixed review comments

* G-API: Fix issues with desync causing failing tests
2020-11-17 14:04:19 +00:00
Dmitry Matveev
a110ede0a2
Merge pull request #18716 from dmatveev:dm/upstream_onnx
* G-API: Introduce ONNX backend for Inference

- Basic operations are implemented (Infer, -ROI, -List, -List2);
- Implemented automatic preprocessing for ONNX models;
- Test suite is extended with `OPENCV_GAPI_ONNX_MODEL_PATH` env for test data
  (test data is an ONNX Model Zoo repo snapshot);
- Fixed kernel lookup logic in core G-API:
  - Lookup NN kernels not in the default package, but in the associated
    backend's aux package. Now two NN backends can work in the same graph.
- Added Infer SSD demo and a combined ONNX/IE demo;

* G-API/ONNX: Fix some of CMake issues

Co-authored-by: Pashchenkov, Maxim <maxim.pashchenkov@intel.com>
2020-11-03 18:39:16 +00:00
Dmitry Matveev
ca8bb8d053 G-API: Introduce streaming::desync and infer(ROI)
- desync() is a new (and for now, the only one) intrinsic
  which splits the graph execution into asynchronous parts
  when running in Streaming mode;
- desync() makes no effect when compiling in Traditional mode;
- Added tests on desync() working in various scenarios;
- Extended GStreamingExecutor to support desync(); also extended
  GStreamingCompiled() with a new version of pull() returning a
  vector of optional values;
- Fixed various issues with storing the type information & proper
  construction callbacks for GArray<> and GOpaque;

- Introduced a new infer(Roi,GMat) overload with a sample;

- Introduced an internal API for Islands to control fusion
  procedure (to fuse or not to fuse);
- Introduced handleStopStream() callback for island executables;
- Added GCompileArgs to metadata of the graph (required for other
  features).
2020-10-29 20:19:15 +03:00
Anatoliy Talamanov
0d3e05f9b3
Merge pull request #18493 from TolyaTalamanov:at/wrap-streaming
[G-API Wrap streaming

* Wrap streaming

* Fix build

* Add comments

* Remove comment

* Fix comments to review

* Add test for python pull overload
2020-10-14 22:21:09 +00:00
maxint
2dd2d60955 Fix warnings: "-Wrange-loop-construct" in gapi 2020-10-10 07:13:23 +00:00
Anatoliy Talamanov
76be3529f4
Merge pull request #18419 from TolyaTalamanov:at/generic-inference
[G-API] Introduce generic version for cv::gapi::infer

* Introduce generic infer

* Move Generic to infer.hpp

* Removew num_outs

* Fix windows warnings

* Fix comments to review

* Fix doxygen

* Add comment

* Fix comments to review

* standoalone ifdef in ginfer.cpp

* Fix test
2020-10-08 22:12:25 +00:00
Dmitry Matveev
050c960dfc G-API: Integrated cv::MediaFrame as I/O type + CPU backend 2020-10-05 20:21:15 +03:00
Ruslan Garnov
5224d016e9
Merge pull request #18339 from rgarnov:rg/rmat_integration
[GAPI] RMat integration into the framework

* RMat integration

* Added initialization of input mat in GArray initialization tests

* Fixed klocwork warnings in RMat tests, changed argument order in EXPECT_EQ
2020-10-04 18:57:41 +00:00
Alexey Smirnov
a3e7c2d8e3
Merge pull request #18452 from smirnov-alexey:as/export_serialization_api
[G-API] Export a part of serialization interface

* Initial stub

* Add test on serialization of a custom type

* Namespaces rework

* Fix isSupported in test struct

* Fix clang build and rework namespaces

* Remove redundant header
2020-10-01 18:11:23 +00:00
Maxim Pashchenkov
830d8d6b75
Merge pull request #18196 from mpashchenkov:mp/garray-initialization
[G-API]: Add GArray initialization support

* Added GArray initialization (CONST_VALUE, GScalar analog) and test for this

* Whitespaces

* And one more space

* Trailing whitespace

* Test name changed. Build with magic commands.

* GArray works with rvalue initialization

* Code cleanup

* Ternary operator in the initialization list.
2020-09-18 13:06:23 +00:00
Alexey Smirnov
a3e8c6e866
Merge pull request #18127 from smirnov-alexey:as/gapi_serialization
[G-API]: Add GOpaque and GArray serialization support

* Add GOpaque and GArray serialization support

* Address review comments

* Remove holds() method

* Address review comments

* Remove comments

* Align streaming with kind changes

* Fix kind in kernel

* Address review comments
2020-09-07 17:10:03 +00:00
Dmitry Matveev
f0c411d8b5
Merge pull request #17502 from dmatveev:dm/infer2
* G-API: Introduce a new gapi::infer2 overload + gaze estimation sample

* G-API/infer2: Introduced static type checking for infer2

- Also added extra tests on the type check routine

* G-API/infer2: Addressed self-review comments in the sample app

- Also fix build on Linux;

* G-API/infer2: Remove incorrect SetLayout(HWC) + dead code

- Also fixed comments in the backend

* G-API/infer2: Continue with self-review

- Fix warnings/compile errors in gaze estimation
- Dropped the use of RTTI (VectorRef::holds()) from the giebackend
- Replaced it with a trait-based enums for GArray<T> and std::vector<T>
- The enums and traits are temporary and need to be unified with
  the S11N when it comes

* G-API/infer2: Final self-review items

- Refactored ROIList test to cover 70% for infer<> and infer2<>;
- Fixed the model data discovery routine to be compatible with new
  OpenVINO;
- Hopefully fixed the final issues (warnings) with the sample.

* G-API/infer2: address review problems

- Fixed typo in comments;
- Fixed public (Doxygen) comment on GArray<GMat> input case for infer2;
- Made model lookup more flexible to allow new & old OMZ dir layouts.

* G-API/infer2: Change the model paths again

* G-API/infer2: Change the lookup path for test data

* G-API/infer2: use randu instead of imread. CI war is over
2020-07-14 11:06:49 +03:00
Dmitry Budnikov
7566921364
Merge pull request #17020 from dbudniko:dbudniko/serialization_backend
G-API Serialization routines

* Serialization backend in tests, initial version

* S11N/00: A Great Rename

- "Serialization" is too long and too error-prone to type,
  so now it is renamed to "s11n" everywhere;
- Same applies to "SRLZ";
- Tests also renamed to start with 'S11N.*' (easier to run);
- Also updated copyright years in new files to 2020.

* S11N/01: Some basic interface segregation

- Moved some details (low-level functions) out of serialization.hpp;
- Introduced I::IStream and I::OStream interfaces;
- Implemented those via the existing [De]SerializationStream classes;
- Moved all operators to use interfaces instead of classes;
- Moved the htonl/ntohl handling out of operators (to the classes).

The implementation didn't change much, it is a subject to the further
refactoring

* S11N/02: Basic operator reorg, basic tests, vector support

- Reorganized operators on atomic types to follow >>/<< model
  (put them closer in the code for the respective types);
- Introduce more operators for basic (scalar) types;
- Drop all vector s11n overloads -- replace with a generic
  (template-based) one;
- Introduced a new test suite where low-level s11n functionality
  is tested (for the basic types).

* S11N/03: Operators reorganization

- Sorted the Opaque types enum by complexity;
- Reorganized the existing operators for basic types, also ordered by
  complexity;
- Organized operators in three groups (Basics, OpenCV, G-API);
- Added a generic serialization for variant<>;
- Reimplemented some of the existing operators (for OpenCV and G-API
  data structures);
- Introduced new operators for cv::gimpl data types. These operators
  (and so, the data structures) are not yet used in the graph
  dump/reconstruction routine, it will be done as a next step.

* S11N/04: The Great Clean-up

- Drop the duplicates of GModel data structures from the
  serialization, serialize the GModel data structures themselve
  instead (hand-written code replaced with operators).
- Also removed usuned code for printing, etc.

* S11N/05: Internal API Clean-up

- Minimize the serialization API to just Streams and Operators;
- Refactor and fix the graph serialization (deconstruction and
  reconstruction) routines, fix data addressing problems there;
- Move the serialization.[ch]pp files to the core G-API library

* S11N/06: Top-level API introduction

- !!!This is likely the most invasive commit in the series!!!
- Introduced a top-level API to serialize and deserialize a GComputation
- Extended the compiler to support both forms of a GComputation:
  an expession based and a deserialized one. This has led to changes in
  the cv::GComputation::Priv and in its dependent components (even the
  transformation tests);
- Had to extend the kernel API (GKernel) with extra information on
  operations (mainly `outMeta`) which was only available for expression
  based graphs. Now the `outMeta` can be taken from kernels too (and for
  the deserialized graphs it is the only way);
- Revisited the internal serialization API, had to expose previously
  hidden entities (like `GSerialized`);
- Extended the serialized graph info with new details (object counter,
  protocol). Added unordered_map generic serialization for that;
- Reworked the very first pipeline test to be "proper"; GREEN now, the rest
  is to be reworked in the next iteration.

* S11N/07: Tests reworked

- Moved the sample pipeline tests w/serialization to
  test the public API (`cv::gapi::serialize`, then
  followed by `cv::gapi::deserialize<>`). All GREEN.
- As a consequence, dropped the "Serialization" test
  backend as no longer necessary.

* S11N/08: Final touches

- Exposed the C++ native data types at Streams level;
- Switched the ByteMemoryIn/OutStreams to store data in `char`
  internally (2x less memory for sample pipelines);
- Fixed and refactored Mat dumping to the stream;
- Renamed S11N pipeline tests to their new meaning.

* linux build fix

* fix RcDesc and int uint warnings

* more Linux build fix

* white space and virtual android error fix (attempt)

* more warnings to be fixed

* android warnings fix attempt

* one more attempt for android build fix

* android warnings one more fix

* return back override

* avoid size_t

* static deserialize

* and how do you like this, elon? anonymous namespace  to fix android warning.

* static inline

* trying to fix standalone build

* mat dims fix

* fix mat r/w for standalone

Co-authored-by: Dmitry Matveev <dmitry.matveev@intel.com>
2020-06-26 19:41:29 +00:00
Anastasiya
eff259b047 Enable state initialization params via compile_args 2020-06-25 00:43:12 +03:00
AsyaPronina
b083c20eb2 Enable stateful kernels in G-API OCV Backend 2020-06-04 22:14:42 +03:00
Maxim Pashchenkov
94e36d8c8d
Merge pull request #16995 from mpashchenkov:mp/ocv-gapi-standalone-mat
G-API: Mat's "deownification"

* deowned Mat

* boner

* Removed canDescribe test for own::Mat

* Removed STANDALONE flag for apply() and operator()

* Removed: desc_tests for own::Mat, descr_of for own::Mat.

* Returned: tests, cv::gapi::own::descr_of; fixed alignment; Removed own::Mat's headers

* Removed unused header own/mat.hpp from gbackend.hpp
2020-04-21 20:22:01 +00:00
Ruslan Garnov
ce772b346c Fixed standalone build, added cv::gapi::proto::ptr test 2020-04-09 17:19:11 +03:00
Dmitry Matveev
b1f42a6506 Implement asynchronous execution for islands 2020-04-08 20:48:23 +03:00
Dmitry Matveev
cb5921b375 Introduced a newStreamSignal() callback for Island Executables 2020-04-08 20:48:23 +03:00
OrestChura
d50c21e571 gapi: Full calcOpticalFlowPyrLK implementation (2 overloads) and tests
- opencv_gapi module is linked with opencv_video module (optional dependency)
     - kernels added to a new cv::gapi::video namespace and a brand new files created to provide gapi_video environment
     - there are 2 different kernels as G-API should provide GMat AND GArray<GMat> implementation: cv::calcOptFlowPyrLK doesn't calculate pyramids if vector<Mat> is given so just the cast GMat -> GArray<GMat> wouldn't represent all the cv:: functionality
     - tests to check both kernels (based on cv::video tests for cv::calcOpticalFlowPyrLK())
     - tests for internal purposes added
     - vectors<T> comparison in tests implemented
     - new (and old too) common test structures refactored to avoid code copypasting
     - "modules/gapi/test/common/gapi_video_tests_common.hpp" created to share some code snippets between perf and acc tests and avoid code copypasting
2020-04-08 18:11:55 +03:00
Dmitry Matveev
43df944eb4 Added GAPI_EXPORTS to GIslandExecutable since now it needs to be exported 2020-04-06 23:42:52 +03:00
Alexander Alekhin
5db3092a1f Merge pull request #16952 from anton-potapov:kw_fixes 2020-04-06 15:55:33 +00:00
Alexander Alekhin
a10385543b Merge pull request #16963 from rgarnov:rg/gframe 2020-04-06 14:35:52 +00:00
Dmitry Matveev
1b5730a799 Introduce a new abstraction layer over island input/output data
- Port GExecutor to this new interface
2020-04-06 12:24:19 +03:00
Ruslan Garnov
c8776e6ebd Added GFrame 2020-04-03 01:21:51 +03:00
Anton Potapov
3ffed0bf6e GAPI - KW fixes
- remove unreachable code in GIsland::producer()
2020-04-02 12:05:34 +03:00
Maxim Pashchenkov
557ac3dbaf
Merge pull request #16805 from Volskig:mp/ocv-gapi-standalone-scalar
G-API: Unification of own:: Scalar with cv:: Scalar

* cvdefs.hpp

* Small changes

* Deowned Scalar. Does't work

* Something

* Removed to_ocv for Scalar

* Clear code

* Deleted whitespaces

* Added include<..own/scalar.hpp in cvdefs.hpp.

* Long string split on two now

* Comment about scalar

* Comment about crutch

* Removed second varible in scalar_wrapper

* Changed wrapper for scalar, alignment

* Alignment

* Whitespaces

* Removed scalar_wrapper
2020-04-01 18:40:38 +00:00
Maxim Pashchenkov
3befdb4ae8
Merge pull request #16604 from Volskig:mp/ocv-gapi-zero-height-mat
G-API: Zero-height mat is cause of crash

* Added check for zero-height Mat case

* Refactoring, added validate_input_arg func

* No bool function now
2020-03-10 14:44:16 +03:00
Alexey Smirnov
0d456f9111
Merge pull request #16118 from smirnov-alexey:as/gopaque
G-API: GOpaque implementation

* Stub initial copypasted solution

* Fix mov test and add a couple of others

* Fix warnings

* More code coverage and tests

* fix macos warning

* address review comments

* Address review comments and fix indentation

* Fix build on armv7
2020-01-30 21:08:11 +03:00
Alexander Alekhin
5265db82c7 Merge pull request #16409 from smirnov-alexey:as/gapi_fix_standalone_streaming 2020-01-24 08:47:57 +00:00
Smirnov Alexey
e5ed22bd5b Fix linkage in standalone mode 2020-01-22 17:51:16 +03:00
Brian Wignall
659ffaddb4 Fix spelling typos 2019-12-26 06:45:03 -05:00
Dmitry Matveev
9a18330f3a Merge pull request #16081 from dmatveev:dm/ocv42_gapi_bugfixes
G-API: Fix various issues for 4.2 release

* G-API: Fix issues reported by Coverity

- Fixed: passing values by value instead of passing by reference

* G-API: Fix redundant std::move()'s in return statements

Fixes #15903

* G-API: Added a smarter handling of Stop messages in the pipeline

- This should fix the "expected 100, got 99 frames" problem
- Fixes #15882

* G-API: Pass enum instead of GKernelPackage in Streaming test parameters

- Likely fixes #15836

* G-API: Address review issues in new bugfix comments
2019-12-10 13:31:42 +03:00
Pinaev Danil
5e3a7ac8a7 Merge pull request #16031 from aDanPin:dm/streaming_auto_meta
G-API-NG/Streaming: don't require explicit metadata in compileStreaming()

* First probably working version
Hardcode gose to setSource() :)

* Pre final version of move metadata declaration from compileStreaming() to setSource().

* G-API-NG/Streaming: recovered the existing Streaming functionality

- The auto-meta test is disabling since it crashes.
- Restored .gitignore

* G-API-NG/Streaming: Made the meta-less compileStreaming() work

- Works fine even with OpenCV backend;
- Fluid doesn't support such kind of compilation so far - to be fixed

* G-API-NG/Streaming: Fix Fluid to support meta-less compilation

- Introduced a notion of metadata-sensitive passes and slightly
  refactored GCompiler and GFluidBackend to support that
- Fixed a TwoVideoSourcesFail test on streaming

* Add three smoke streaming tests to gapi_streaming_tests.
All three teste run pipeline with two different input sets
1) SmokeTest_Two_Const_Mats test run pipeline with two const Mats
2) SmokeTest_One_Video_One_Const_Scalar test run pipleline with Mat(video source) and const Scalar
3) SmokeTest_One_Video_One_Const_Vector test run pipeline with Mat(video source) and const Vector
 # Please enter the commit message for your changes. Lines starting

* style fix

* Some review stuff

* Some review stuff
2019-12-03 19:14:13 +03:00
atalaman
a7acb8805f Merge pull request #15869 from TolyaTalamanov:at/plaidml-backend
G-API: Implement PlaidML2 backend

* PlaidML backend init version

* Add test

* Support multiply inputs/outputs in PlaidML2 backend

* Fix comment to review

* Add HAVE_PLAIDML macros

* Move plaidml tests to separate file

* Fix comment to review

* Fix cmake warning

* Fix comments to review

* Fix typos

overload -> overflow

* Fix comments to review

* Clean up

* Remove spaces from cmake scripts
* Disable tests with bitwise operations

* Use plaidml::exec::Binder
2019-11-27 18:21:00 +03:00
Ruslan Garnov
e89c1103ff Returned GModel::mkDataNode() overload for external backends 2019-10-22 18:57:31 +03:00
Dmitry Matveev
2477103707 Merge pull request #15216 from dmatveev:dm/ng-0010-g-api-streaming-api
* G-API-NG/Streaming: Introduced a Streaming API

Now a GComputation can be compiled in a special "streaming" way
and then "played" on a video stream.

Currently only VideoCapture is supported as an input source.

* G-API-NG/Streaming: added threading & real streaming

* G-API-NG/Streaming: Added tests & docs on Copy kernel

- Added very simple pipeline tests, not all data types are covered yet
  (in fact, only GMat is tested now);
- Started testing non-OCV backends in the streaming mode;
- Added required fixes to Fluid backend, likely it works OK now;
- Added required fixes to OCL backend, and now it is likely broken
- Also added a UMat-based (OCL) version of Copy kernel

* G-API-NG/Streaming: Added own concurrent queue class

- Used only if TBB is not available

* G-API-NG/Streaming: Fixing various issues

- Added missing header to CMakeLists.txt
- Fixed various CI issues and warnings

* G-API-NG/Streaming: Fixed a compile-time GScalar queue deadlock

- GStreamingExecutor blindly created island's input queues for
  compile-time (value-initialized) GScalars which didn't have any
  producers, making island actor threads wait there forever

* G-API-NG/Streaming: Dropped own version of Copy kernel

One was added into master already

* G-API-NG/Streaming: Addressed GArray<T> review comments

- Added tests on mov()
- Removed unnecessary changes in garray.hpp

* G-API-NG/Streaming: Added Doxygen comments to new public APIs

Also fixed some other comments in the code

* G-API-NG/Streaming: Removed debug info, added some comments & renamed vars

* G-API-NG/Streaming: Fixed own-vs-cv abstraction leak

- Now every island is triggered with own:: (instead of cv::)
  data objects as inputs;
- Changes in Fluid backend required to support cv::Mat/Scalar were
  reverted;

* G-API-NG/Streaming: use holds_alternative<> instead of index/index_of test

- Also fixed regression test comments
- Also added metadata check comments for GStreamingCompiled

* G-API-NG/Streaming: Made start()/stop() more robust

- Fixed various possible deadlocks
- Unified the shutdown code
- Added more tests covering different corner cases on start/stop

* G-API-NG/Streaming: Finally fixed Windows crashes

In fact the problem hasn't been Windows-only.
Island thread popped data from queues without preserving the Cmd
objects and without taking the ownership over data acquired so when
islands started to process the data, this data may be already freed.

Linux version worked only by occasion.

* G-API-NG/Streaming: Fixed (I hope so) Windows warnings

* G-API-NG/Streaming: fixed typos in internal comments

- Also added some more explanation on Streaming/OpenCL status

* G-API-NG/Streaming: Added more unit tests on streaming

- Various start()/stop()/setSource() call flow combinations

* G-API-NG/Streaming: Added tests on own concurrent bounded queue

* G-API-NG/Streaming: Added more tests on various data types, + more

- Vector/Scalar passed as input;
- Vector/Scalar passed in-between islands;
- Some more assertions;
- Also fixed a deadlock problem when inputs are mixed (1 constant, 1 stream)

* G-API-NG/Streaming: Added tests on output data types handling

- Vector
- Scalar

* G-API-NG/Streaming: Fixed test issues with IE + Windows warnings

* G-API-NG/Streaming: Decoupled G-API from videoio

- Now the core G-API doesn't use a cv::VideoCapture directly,
  it comes in via an abstract interface;
- Polished a little bit the setSource()/start()/stop() semantics,
  now setSource() is mandatory before ANY call to start().

* G-API-NG/Streaming: Fix STANDALONE build (errors brought by render)
2019-10-18 19:29:58 +03:00