| /* |
| * Copyright (C) 2018 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #pragma once |
| |
| /* |
| * Contains declarations for video playback camera API that is used by the |
| * camera emulator. |
| */ |
| |
| #include "android/camera/camera-common.h" |
| #include "android/utils/compiler.h" |
| |
| #include <stdint.h> |
| |
| ANDROID_BEGIN_HEADER |
| |
| // Get the preferred pixel format for the video playback camera, which should be |
| // used for maximum performance. If the preferred format is not supported by the |
| // guest camera_videoplayback_read_frame will perform colorspace conversion. |
| // |
| // Returns a V4L2_PIX_FMT_* pixel format. |
| uint32_t camera_videoplayback_preferred_format(); |
| |
| // Initializes camera device descriptor, and connects to the camera device. |
| // |
| // Returns null on failure. On success, the CameraDevice must be closed with |
| // camera_videoplayback_close. |
| // |
| // |name| - The name of the device to open. Unused for videoplayback. |
| // |inp_channel| - Input channel for the webcam. Unused for videoplayback. |
| // |
| // Returns initialized camera device descriptor on success, or NULL on failure. |
| CameraDevice* camera_videoplayback_open(const char* name, int inp_channel); |
| |
| // Starts capturing frames from the CameraDevice. |
| // |
| // |cd| - Camera descriptor representing a camera device, must have been opened |
| // with the camera_videoplayback_open API. |
| // |pixel_format| - Pixel format for the captured frames, preferably the format |
| // returned from camera_videoplayback_preferred_format. |
| // |width|, |height| - Frame dimensions for the captured video frame. Must match |
| // dimensions supported by the camera for the pixel format |
| // defined by the |pixel_format| parameter. |
| // |
| // Returns 0 on success, or non-zero on failure. |
| int camera_videoplayback_start_capturing(CameraDevice* cd, |
| uint32_t pixel_format, |
| int frame_width, |
| int frame_height); |
| |
| // Stops capturing frames from the camera device. |
| // |
| // |cd| - Camera descriptor representing a camera device, must have been opened |
| // with the camera_videoplayback_open API. |
| // |
| // Returns 0 on success, or non-zero on failure. |
| int camera_videoplayback_stop_capturing(CameraDevice* cd); |
| |
| // Captures a frame from the camera device. |
| // |
| // |cd| - Camera descriptor representing a camera device, must have been opened |
| // with the camera_videoplayback_open API. |
| // |result_frame| - ClientFrame struct containing an array of framebuffers |
| // where to convert the frame. |
| // |r_scale|, |g_scale|, |b_scale| - White balance scale. |
| // |exp_comp| - Exposure compensation. |
| // |
| // Returns 0 on success, or non-zero on failure. |
| int camera_videoplayback_read_frame(CameraDevice* cd, |
| ClientFrame* result_frame, |
| float r_scale, |
| float g_scale, |
| float b_scale, |
| float exp_comp); |
| |
| // Closes the camera device, which was opened from the camera_videoplayback_open |
| // API. |
| // |
| // |cd| - Camera descriptor representing a camera device, must have been opened |
| // with the camera_videoplayback_open API. |
| void camera_videoplayback_close(CameraDevice* cd); |
| |
| ANDROID_END_HEADER |
