Support for acting as a wifi display sink. (fbe9d81f) · Commits · e / os / android_frameworks_av

media/libmediaplayerservice/nuplayer/NuPlayer.cpp

+2 −2

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	@@ -293,8 +293,8 @@ void NuPlayer::onMessageReceived(const sp<AMessage> &msg) {
	break;		break;
	}		}

	if (mAudioDecoder == NULL && mAudioSink != NULL \|\|		if ((mAudioDecoder == NULL && mAudioSink != NULL)
	mVideoDecoder == NULL && mNativeWindow != NULL) {		\|\| (mVideoDecoder == NULL && mNativeWindow != NULL)) {
	msg->post(100000ll);		msg->post(100000ll);
	mScanSourcesPending = true;		mScanSourcesPending = true;
	}		}

media/libstagefright/wifi-display/Android.mk

+4 −0

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	@@ -5,6 +5,10 @@ include $(CLEAR_VARS)
	LOCAL_SRC_FILES:= \		LOCAL_SRC_FILES:= \
	ANetworkSession.cpp \		ANetworkSession.cpp \
	ParsedMessage.cpp \		ParsedMessage.cpp \
			sink/LinearRegression.cpp \
			sink/RTPSink.cpp \
			sink/TunnelRenderer.cpp \
			sink/WifiDisplaySink.cpp \
	source/Converter.cpp \		source/Converter.cpp \
	source/PlaybackSession.cpp \		source/PlaybackSession.cpp \
	source/RepeaterSource.cpp \		source/RepeaterSource.cpp \

media/libstagefright/wifi-display/sink/LinearRegression.cpp

0 → 100644

+110 −0

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			/*
			* Copyright 2012, 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 "LinearRegression"
			#include <utils/Log.h>

			#include "LinearRegression.h"

			#include <math.h>
			#include <string.h>

			namespace android {

			LinearRegression::LinearRegression(size_t historySize)
			: mHistorySize(historySize),
			mCount(0),
			mHistory(new Point[mHistorySize]),
			mSumX(0.0),
			mSumY(0.0) {
			}

			LinearRegression::~LinearRegression() {
			delete[] mHistory;
			mHistory = NULL;
			}

			void LinearRegression::addPoint(float x, float y) {
			if (mCount == mHistorySize) {
			const Point &oldest = mHistory[0];

			mSumX -= oldest.mX;
			mSumY -= oldest.mY;

			memmove(&mHistory[0], &mHistory[1], (mHistorySize - 1) * sizeof(Point));
			--mCount;
			}

			Point *newest = &mHistory[mCount++];
			newest->mX = x;
			newest->mY = y;

			mSumX += x;
			mSumY += y;
			}

			bool LinearRegression::approxLine(float n1, float n2, float *b) const {
			static const float kEpsilon = 1.0E-4;

			if (mCount < 2) {
			return false;
			}

			float sumX2 = 0.0f;
			float sumY2 = 0.0f;
			float sumXY = 0.0f;

			float meanX = mSumX / (float)mCount;
			float meanY = mSumY / (float)mCount;

			for (size_t i = 0; i < mCount; ++i) {
			const Point &p = mHistory[i];

			float x = p.mX - meanX;
			float y = p.mY - meanY;

			sumX2 += x * x;
			sumY2 += y * y;
			sumXY += x * y;
			}

			float T = sumX2 + sumY2;
			float D = sumX2 * sumY2 - sumXY * sumXY;
			float root = sqrt(T * T * 0.25 - D);

			float L1 = T * 0.5 - root;

			if (fabs(sumXY) > kEpsilon) {
			*n1 = 1.0;
			n2 = (2.0 L1 - sumX2) / sumXY;

			float mag = sqrt((n1) (n1) + (n2) * (*n2));

			*n1 /= mag;
			*n2 /= mag;
			} else {
			*n1 = 0.0;
			*n2 = 1.0;
			}

			b = (n1) * meanX + (n2) meanY;

			return true;
			}

			} // namespace android

media/libstagefright/wifi-display/sink/LinearRegression.h

0 → 100644

+52 −0

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			/*
			* Copyright 2012, 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.
			*/

			#ifndef LINEAR_REGRESSION_H_

			#define LINEAR_REGRESSION_H_

			#include <sys/types.h>
			#include <media/stagefright/foundation/ABase.h>

			namespace android {

			// Helper class to fit a line to a set of points minimizing the sum of
			// squared (orthogonal) distances from line to individual points.
			struct LinearRegression {
			LinearRegression(size_t historySize);
			~LinearRegression();

			void addPoint(float x, float y);

			bool approxLine(float n1, float n2, float *b) const;

			private:
			struct Point {
			float mX, mY;
			};

			size_t mHistorySize;
			size_t mCount;
			Point *mHistory;

			float mSumX, mSumY;

			DISALLOW_EVIL_CONSTRUCTORS(LinearRegression);
			};

			} // namespace android

			#endif // LINEAR_REGRESSION_H_

media/libstagefright/wifi-display/sink/RTPSink.cpp

0 → 100644

+806 −0

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