ICameraService: Add methods to query concurrent streaming camera support.

- getConcurrentStreamingCameraIds() :
        returns a list of combinations of camera ids that may stream
        concurrently.

- isConcurrentSessionConfigurationSupported() :
        queries whether camera devices can support the
        corresponding given session configurations concurrently.

Bug: 77960042

Test: GCA (sanity)
Test: CTS

Change-Id: Iba237118ccf145695a500a2c406713e416e66011
Signed-off-by: Jayant Chowdhary <jchowdhary@google.com>

1 files changed, 129 insertions, 0 deletions

diff --git a/camera/camera2/ConcurrentCamera.cpp b/camera/camera2/ConcurrentCamera.cpp
new file mode 100644
index 0000000000..01a695c979
--- /dev/null
+++ b/camera/camera2/ConcurrentCamera.cpp
@@ -0,0 +1,129 @@
+/*
+ * Copyright (C) 2020 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.
+ */
+
+// #define LOG_NDEBUG 0
+#define LOG_TAG "ConcurrentCamera"
+#include <utils/Log.h>
+#include <utils/String16.h>
+
+#include <camera/camera2/ConcurrentCamera.h>
+
+#include <binder/Parcel.h>
+
+namespace android {
+namespace hardware {
+namespace camera2 {
+namespace utils {
+
+ConcurrentCameraIdCombination::ConcurrentCameraIdCombination() = default;
+
+ConcurrentCameraIdCombination::ConcurrentCameraIdCombination(
+        std::vector<std::string> &&combination) : mConcurrentCameraIds(std::move(combination)) { }
+
+ConcurrentCameraIdCombination::~ConcurrentCameraIdCombination() = default;
+
+status_t ConcurrentCameraIdCombination::readFromParcel(const android::Parcel* parcel) {
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+    status_t err = OK;
+    mConcurrentCameraIds.clear();
+    int32_t cameraIdCount = 0;
+    if ((err = parcel->readInt32(&cameraIdCount)) != OK) {
+        ALOGE("%s: Failed to read the camera id count from parcel: %d", __FUNCTION__, err);
+        return err;
+    }
+    for (int32_t i = 0; i < cameraIdCount; i++) {
+        String16 id;
+        if ((err = parcel->readString16(&id)) != OK) {
+            ALOGE("%s: Failed to read camera id!", __FUNCTION__);
+            return err;
+        }
+        mConcurrentCameraIds.push_back(std::string(String8(id).string()));
+    }
+    return OK;
+}
+
+status_t ConcurrentCameraIdCombination::writeToParcel(android::Parcel* parcel) const {
+
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    status_t err = OK;
+
+    if ((err = parcel->writeInt32(mConcurrentCameraIds.size())) != OK) {
+        ALOGE("%s: Failed to write the camera id count to parcel: %d", __FUNCTION__, err);
+        return err;
+    }
+
+    for (const auto &it : mConcurrentCameraIds) {
+        if ((err = parcel->writeString16(String16(it.c_str()))) != OK) {
+            ALOGE("%s: Failed to write the camera id string to parcel: %d", __FUNCTION__, err);
+            return err;
+        }
+    }
+    return OK;
+}
+
+CameraIdAndSessionConfiguration::CameraIdAndSessionConfiguration() = default;
+CameraIdAndSessionConfiguration::~CameraIdAndSessionConfiguration() = default;
+
+status_t CameraIdAndSessionConfiguration::readFromParcel(const android::Parcel* parcel) {
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+    status_t err = OK;
+    String16 id;
+    if ((err = parcel->readString16(&id)) != OK) {
+        ALOGE("%s: Failed to read camera id!", __FUNCTION__);
+        return err;
+    }
+    if ((err = mSessionConfiguration.readFromParcel(parcel)) != OK) {
+        ALOGE("%s: Failed to read sessionConfiguration!", __FUNCTION__);
+        return err;
+    }
+    mCameraId = std::string(String8(id).string());
+    return OK;
+}
+
+status_t CameraIdAndSessionConfiguration::writeToParcel(android::Parcel* parcel) const {
+
+    if (parcel == nullptr) {
+        ALOGE("%s: Null parcel", __FUNCTION__);
+        return BAD_VALUE;
+    }
+
+    status_t err = OK;
+    if ((err = parcel->writeString16(String16(mCameraId.c_str()))) != OK) {
+        ALOGE("%s: Failed to write camera id!", __FUNCTION__);
+        return err;
+    }
+
+    if ((err = mSessionConfiguration.writeToParcel(parcel) != OK)) {
+        ALOGE("%s: Failed to write session configuration!", __FUNCTION__);
+        return err;
+    }
+    return OK;
+}
+
+} // namespace utils
+} // namespace camera2
+} // namespace hardware
+} // namespace android