Add experimental camera session prepare API. (c78ac26e) · Commits · e / os / android_frameworks_av

camera/camera2/ICameraDeviceUser.cpp

+25 −2

Original line number	Diff line number	Diff line
		@@ -49,7 +49,8 @@ enum {
		WAIT_UNTIL_IDLE,
		FLUSH,
		PREPARE,
		TEAR_DOWN
		TEAR_DOWN,
		PREPARE2
		};

		namespace {
		@@ -366,6 +367,21 @@ public:
		return reply.readInt32();
		}

		virtual status_t prepare2(int maxCount, int streamId)
		{
		ALOGV("prepare2");
		Parcel data, reply;

		data.writeInterfaceToken(ICameraDeviceUser::getInterfaceDescriptor());
		data.writeInt32(maxCount);
		data.writeInt32(streamId);

		remote()->transact(PREPARE2, data, &reply);

		reply.readExceptionCode();
		return reply.readInt32();
		}

		virtual status_t tearDown(int streamId)
		{
		ALOGV("tearDown");
		@@ -592,7 +608,14 @@ status_t BnCameraDeviceUser::onTransact(
		reply->writeInt32(tearDown(streamId));
		return NO_ERROR;
		} break;

		case PREPARE2: {
		CHECK_INTERFACE(ICameraDeviceUser, data, reply);
		int maxCount = data.readInt32();
		int streamId = data.readInt32();
		reply->writeNoException();
		reply->writeInt32(prepare2(maxCount, streamId));
		return NO_ERROR;
		} break;
		default:
		return BBinder::onTransact(code, data, reply, flags);
		}

+5 −0

Original line number	Diff line number	Diff line
		@@ -139,6 +139,11 @@ public:
		*/
		virtual status_t prepare(int streamId) = 0;

		/**
		* Preallocate up to maxCount buffers for a given output stream asynchronously.
		*/
		virtual status_t prepare2(int maxCount, int streamId) = 0;

		/**
		* Free all unused buffers for a given output stream.
		*/

+37 −0

Original line number	Diff line number	Diff line
		@@ -719,6 +719,43 @@ status_t CameraDeviceClient::prepare(int streamId) {
		return res;
		}

		status_t CameraDeviceClient::prepare2(int maxCount, int streamId) {
		ATRACE_CALL();
		ALOGV("%s", __FUNCTION__);

		status_t res = OK;
		if ( (res = checkPid(__FUNCTION__) ) != OK) return res;

		Mutex::Autolock icl(mBinderSerializationLock);

		// Guard against trying to prepare non-created streams
		ssize_t index = NAME_NOT_FOUND;
		for (size_t i = 0; i < mStreamMap.size(); ++i) {
		if (streamId == mStreamMap.valueAt(i)) {
		index = i;
		break;
		}
		}

		if (index == NAME_NOT_FOUND) {
		ALOGW("%s: Camera %d: Invalid stream ID (%d) specified, no stream created yet",
		__FUNCTION__, mCameraId, streamId);
		return BAD_VALUE;
		}

		if (maxCount <= 0) {
		ALOGE("%s: Camera %d: Invalid maxCount (%d) specified, must be greater than 0.",
		__FUNCTION__, mCameraId, maxCount);
		return BAD_VALUE;
		}

		// Also returns BAD_VALUE if stream ID was not valid, or stream already
		// has been used
		res = mDevice->prepare(maxCount, streamId);

		return res;
		}

		status_t CameraDeviceClient::tearDown(int streamId) {
		ATRACE_CALL();
		ALOGV("%s", __FUNCTION__);

+3 −0

Original line number	Diff line number	Diff line
		@@ -114,6 +114,9 @@ public:
		// Tear down stream resources by freeing its unused buffers
		virtual status_t tearDown(int streamId);

		// Prepare stream by preallocating up to maxCount of its buffers
		virtual status_t prepare2(int maxCount, int streamId);

		/**
		* Interface used by CameraService
		*/

+6 −0

Original line number	Diff line number	Diff line
		@@ -293,6 +293,12 @@ class CameraDeviceBase : public virtual RefBase {
		*/
		virtual status_t tearDown(int streamId) = 0;

		/**
		* Prepare stream by preallocating up to maxCount buffers for it asynchronously.
		* Calls notifyPrepared() once allocation is complete.
		*/
		virtual status_t prepare(int maxCount, int streamId) = 0;

		/**
		* Get the HAL device version.
		*/