1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
|
/*
* Copyright (C) 2011 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.
*/
package com.android.camera.panorama;
import android.util.Log;
/**
* Class to handle the processing of each frame by Mosaicer.
*/
public class MosaicFrameProcessor {
private static final boolean LOGV = true;
private static final String TAG = "MosaicFrameProcessor";
private static final int NUM_FRAMES_IN_BUFFER = 2;
private static final int MAX_NUMBER_OF_FRAMES = 100;
private static final int FRAME_COUNT_INDEX = 9;
private static final int X_COORD_INDEX = 2;
private static final int Y_COORD_INDEX = 5;
private Mosaic mMosaicer;
private final byte[][] mFrames = new byte[NUM_FRAMES_IN_BUFFER][]; // Space for N frames
private final long [] mFrameTimestamp = new long[NUM_FRAMES_IN_BUFFER];
private float mTranslationLastX;
private float mTranslationLastY;
private int mFillIn = 0;
private int mTotalFrameCount = 0;
private long mLastProcessedFrameTimestamp = 0;
private int mLastProcessFrameIdx = -1;
private int mCurrProcessFrameIdx = -1;
private ProgressListener mProgressListener;
private float mCompassValueX;
private float mCompassValueY;
private float mCompassValueXStart;
private float mCompassValueYStart;
private int mCompassThreshold;
private int mTraversedAngleX;
private int mTraversedAngleY;
private float mTranslationRate;
private int mPreviewWidth;
private int mPreviewHeight;
private int mPreviewBufferSize;
public interface ProgressListener {
public void onProgress(boolean isFinished, float translationRate,
int traversedAngleX, int traversedAngleY);
}
public MosaicFrameProcessor(int sweepAngle, int previewWidth, int previewHeight, int bufSize) {
mMosaicer = new Mosaic();
mCompassThreshold = sweepAngle;
mPreviewWidth = previewWidth;
mPreviewHeight = previewHeight;
mPreviewBufferSize = bufSize;
}
public void setProgressListener(ProgressListener listener) {
mProgressListener = listener;
}
public void initialize() {
setupMosaicer(mPreviewWidth, mPreviewHeight, mPreviewBufferSize);
reset();
}
public void clear() {
mMosaicer.freeMosaicMemory();
for (int i = 0; i < NUM_FRAMES_IN_BUFFER; i++) {
mFrames[i] = null;
}
}
private void setupMosaicer(int previewWidth, int previewHeight, int bufSize) {
Log.v(TAG, "setupMosaicer w, h=" + previewWidth + ',' + previewHeight + ',' + bufSize);
mMosaicer.allocateMosaicMemory(previewWidth, previewHeight);
for (int i = 0; i < NUM_FRAMES_IN_BUFFER; i++) {
mFrames[i] = new byte[bufSize];
}
mFillIn = 0;
if (mMosaicer != null) {
mMosaicer.reset();
}
}
public void reset() {
// reset() can be called even if MosaicFrameProcessor is not initialized.
// Only counters will be changed.
mTotalFrameCount = 0;
mFillIn = 0;
mLastProcessedFrameTimestamp = 0;
mLastProcessFrameIdx = -1;
mCurrProcessFrameIdx = -1;
mMosaicer.reset();
}
public void createMosaic(boolean highRes) {
mMosaicer.createMosaic(highRes);
}
public byte[] getFinalMosaicNV21() {
return mMosaicer.getFinalMosaicNV21();
}
// Processes the last filled image frame through the mosaicer and
// updates the UI to show progress.
// When done, processes and displays the final mosaic.
public void processFrame(byte[] data) {
if (mFrames[mFillIn] == null) {
// clear() is called and buffers are cleared, stop computation.
// This can happen when the onPause() is called in the activity, but still some frames
// are not processed yet and thus the callback may be invoked.
return;
}
long t1 = System.currentTimeMillis();
mFrameTimestamp[mFillIn] = t1;
System.arraycopy(data, 0, mFrames[mFillIn], 0, data.length);
mCurrProcessFrameIdx = mFillIn;
mFillIn = ((mFillIn + 1) % NUM_FRAMES_IN_BUFFER);
// Check that we are trying to process a frame different from the
// last one processed (useful if this class was running asynchronously)
if (mCurrProcessFrameIdx != mLastProcessFrameIdx) {
mLastProcessFrameIdx = mCurrProcessFrameIdx;
// Access the image data and the timestamp associated with it...
byte[] currentFrame = mFrames[mCurrProcessFrameIdx];
long timestamp = mFrameTimestamp[mCurrProcessFrameIdx];
// Keep track of what compass bearing we started at...
if (mTotalFrameCount == 0) { // First frame
mCompassValueXStart = mCompassValueX;
mCompassValueYStart = mCompassValueY;
}
// By what angle has the camera moved since start of capture?
mTraversedAngleX = (int) PanoUtil.calculateDifferenceBetweenAngles(
mCompassValueX, mCompassValueXStart);
mTraversedAngleY = (int) PanoUtil.calculateDifferenceBetweenAngles(
mCompassValueY, mCompassValueYStart);
if (mTotalFrameCount <= MAX_NUMBER_OF_FRAMES
&& mTraversedAngleX < mCompassThreshold
&& mTraversedAngleY < mCompassThreshold) {
// If we are still collecting new frames for the current mosaic,
// process the new frame.
translateFrame(currentFrame, timestamp);
// Publish progress of the ongoing processing
if (mProgressListener != null) {
mProgressListener.onProgress(false, mTranslationRate,
mTraversedAngleX, mTraversedAngleY);
}
} else {
if (mProgressListener != null) {
mProgressListener.onProgress(true, mTranslationRate,
mTraversedAngleX, mTraversedAngleY);
}
}
}
}
public void translateFrame(final byte[] data, long now) {
float deltaTime = (now - mLastProcessedFrameTimestamp) / 1000.0f;
mLastProcessedFrameTimestamp = now;
float[] frameData = mMosaicer.setSourceImage(data);
mTotalFrameCount = (int) frameData[FRAME_COUNT_INDEX];
float translationCurrX = frameData[X_COORD_INDEX];
float translationCurrY = frameData[Y_COORD_INDEX];
mTranslationRate = Math.max(Math.abs(translationCurrX - mTranslationLastX),
Math.abs(translationCurrY - mTranslationLastY)) / deltaTime;
mTranslationLastX = translationCurrX;
mTranslationLastY = translationCurrY;
}
public void updateCompassValue(float valueX, float valueY) {
mCompassValueX = valueX;
mCompassValueY = valueY;
}
}
|
