| /* |
| * Copyright 2015 The WebRTC project authors. All Rights Reserved. |
| * |
| * Use of this source code is governed by a BSD-style license |
| * that can be found in the LICENSE file in the root of the source |
| * tree. An additional intellectual property rights grant can be found |
| * in the file PATENTS. All contributing project authors may |
| * be found in the AUTHORS file in the root of the source tree. |
| */ |
| |
| package org.webrtc; |
| |
| import android.annotation.TargetApi; |
| import android.content.Context; |
| |
| import android.graphics.ImageFormat; |
| import android.hardware.camera2.CameraCharacteristics; |
| import android.hardware.camera2.CameraManager; |
| import android.hardware.camera2.params.StreamConfigurationMap; |
| import android.os.Build; |
| import android.os.SystemClock; |
| import android.util.Range; |
| import android.util.Size; |
| |
| import org.webrtc.CameraEnumerationAndroid.CaptureFormat; |
| import org.webrtc.Logging; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.List; |
| import java.util.Map; |
| |
| @TargetApi(21) |
| public class Camera2Enumerator { |
| private final static String TAG = "Camera2Enumerator"; |
| private final static double NANO_SECONDS_PER_SECOND = 1.0e9; |
| |
| // Each entry contains the supported formats for a given camera index. The formats are enumerated |
| // lazily in getSupportedFormats(), and cached for future reference. |
| private static final Map<String, List<CaptureFormat>> cachedSupportedFormats = |
| new HashMap<String, List<CaptureFormat>>(); |
| |
| public static boolean isSupported() { |
| return Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP; |
| } |
| |
| public static List<CaptureFormat> getSupportedFormats(Context context, String cameraId) { |
| return getSupportedFormats( |
| (CameraManager) context.getSystemService(Context.CAMERA_SERVICE), cameraId); |
| } |
| |
| public static List<CaptureFormat> getSupportedFormats( |
| CameraManager cameraManager, String cameraId) { |
| synchronized (cachedSupportedFormats) { |
| if (cachedSupportedFormats.containsKey(cameraId)) { |
| return cachedSupportedFormats.get(cameraId); |
| } |
| Logging.d(TAG, "Get supported formats for camera index " + cameraId + "."); |
| final long startTimeMs = SystemClock.elapsedRealtime(); |
| |
| final CameraCharacteristics cameraCharacteristics; |
| try { |
| cameraCharacteristics = cameraManager.getCameraCharacteristics(cameraId); |
| } catch (Exception ex) { |
| Logging.e(TAG, "getCameraCharacteristics(): " + ex); |
| return new ArrayList<CaptureFormat>(); |
| } |
| |
| // Calculate default max fps from auto-exposure ranges in case getOutputMinFrameDuration() is |
| // not supported. |
| final Range<Integer>[] fpsRanges = |
| cameraCharacteristics.get(CameraCharacteristics.CONTROL_AE_AVAILABLE_TARGET_FPS_RANGES); |
| int defaultMaxFps = 0; |
| for (Range<Integer> fpsRange : fpsRanges) { |
| defaultMaxFps = Math.max(defaultMaxFps, fpsRange.getUpper()); |
| } |
| |
| final StreamConfigurationMap streamMap = |
| cameraCharacteristics.get(CameraCharacteristics.SCALER_STREAM_CONFIGURATION_MAP); |
| final Size[] sizes = streamMap.getOutputSizes(ImageFormat.YUV_420_888); |
| if (sizes == null) { |
| throw new RuntimeException("ImageFormat.YUV_420_888 not supported."); |
| } |
| |
| final List<CaptureFormat> formatList = new ArrayList<CaptureFormat>(); |
| for (Size size : sizes) { |
| long minFrameDurationNs = 0; |
| try { |
| minFrameDurationNs = streamMap.getOutputMinFrameDuration(ImageFormat.YUV_420_888, size); |
| } catch (Exception e) { |
| // getOutputMinFrameDuration() is not supported on all devices. Ignore silently. |
| } |
| final int maxFps = (minFrameDurationNs == 0) |
| ? defaultMaxFps |
| : (int) Math.round(NANO_SECONDS_PER_SECOND / minFrameDurationNs); |
| formatList.add(new CaptureFormat(size.getWidth(), size.getHeight(), 0, maxFps * 1000)); |
| } |
| cachedSupportedFormats.put(cameraId, formatList); |
| final long endTimeMs = SystemClock.elapsedRealtime(); |
| Logging.d(TAG, "Get supported formats for camera index " + cameraId + " done." |
| + " Time spent: " + (endTimeMs - startTimeMs) + " ms."); |
| return formatList; |
| } |
| } |
| } |