1 /*
2  * Copyright (C) 2017 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 #ifndef VIDEOTEX_H
17 #define VIDEOTEX_H
18 
19 #include "StreamHandler.h"
20 #include "TexWrapper.h"
21 
22 #include <EGL/egl.h>
23 #include <EGL/eglext.h>
24 #include <GLES2/gl2.h>
25 #include <GLES2/gl2ext.h>
26 #include <GLES3/gl3.h>
27 #include <GLES3/gl3ext.h>
28 #include <aidl/android/hardware/automotive/evs/BufferDesc.h>
29 #include <aidl/android/hardware/automotive/evs/IEvsCamera.h>
30 #include <aidl/android/hardware/automotive/evs/IEvsEnumerator.h>
31 #include <aidl/android/hardware/automotive/evs/Stream.h>
32 
33 #include <system/graphics-base.h>
34 
35 class VideoTex final : public TexWrapper {
36     friend VideoTex* createVideoTexture(
37             const std::shared_ptr<aidl::android::hardware::automotive::evs::IEvsEnumerator>& pEnum,
38             const char* evsCameraId,
39             std::unique_ptr<aidl::android::hardware::automotive::evs::Stream> streamCfg,
40             EGLDisplay glDisplay, bool useExternalMemory, android_pixel_format_t format);
41 
42 public:
43     VideoTex() = delete;
44     virtual ~VideoTex();
45 
46     bool refresh();  // returns true if the texture contents were updated
47 
48 private:
49     VideoTex(std::shared_ptr<aidl::android::hardware::automotive::evs::IEvsEnumerator> pEnum,
50              std::shared_ptr<aidl::android::hardware::automotive::evs::IEvsCamera> pCamera,
51              std::shared_ptr<StreamHandler> pStreamHandler, EGLDisplay glDisplay);
52 
53     std::shared_ptr<aidl::android::hardware::automotive::evs::IEvsEnumerator> mEnumerator;
54     std::shared_ptr<aidl::android::hardware::automotive::evs::IEvsCamera> mCamera;
55     std::shared_ptr<StreamHandler> mStreamHandler;
56     aidl::android::hardware::automotive::evs::BufferDesc mImageBuffer;
57 
58     EGLDisplay mDisplay;
59     EGLImageKHR mKHRimage = EGL_NO_IMAGE_KHR;
60 };
61 
62 // Creates a video texture to draw the camera preview.  format is effective only
63 // when useExternalMemory is true.
64 VideoTex* createVideoTexture(
65         const std::shared_ptr<aidl::android::hardware::automotive::evs::IEvsEnumerator>& pEnum,
66         const char* deviceName,
67         std::unique_ptr<aidl::android::hardware::automotive::evs::Stream> streamCfg,
68         EGLDisplay glDisplay, bool useExternalMemory = false,
69         android_pixel_format_t format = HAL_PIXEL_FORMAT_RGBA_8888);
70 
71 #endif  // VIDEOTEX_H
72