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Changes 视频镜像处理
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@sinxiaji
sinxiaji committed Jan 6, 2022
1 parent dd1c0a0 commit 8dc08b6
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Showing 2 changed files with 122 additions and 27 deletions.
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149 changes: 122 additions & 27 deletions app/src/main/java/com/example/vcam/VideoToFrames.java
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Original file line number Diff line number Diff line change
Expand Up @@ -275,6 +275,125 @@ private byte[] rotateYUV420Degree90(byte[] data, int imageWidth, int imageHeight
return yuv;
}


/**
* 进行NV21镜像操作
* @param src 原始数据
* @param w 镜像前数据的宽
* @param h 镜像前数据的高
* @return 镜像后的数据
*/
private static void MirrorNv21(byte[] src, int w, int h) { //src是原始yuv数组
int i;
int index;
byte temp;
int a, b;
//mirror y
for (i = 0; i < h; i++) {
a = i * w;
b = (i + 1) * w - 1;
while (a < b) {
temp = src[a];
src[a] = src[b];
src[b] = temp;
a++;
b--;
}
}

// mirror u and v
index = w * h;
for (i = 0; i < h / 2; i++) {
a = i * w;
b = (i + 1) * w - 2;
while (a < b) {
temp = src[a + index];
src[a + index] = src[b + index];
src[b + index] = temp;

temp = src[a + index + 1];
src[a + index + 1] = src[b + index + 1];
src[b + index + 1] = temp;
a+=2;
b-=2;
}
}
}


/**
* 进行I420镜像操作
* @param src 原始数据
* @param w 镜像前数据的宽
* @param h 镜像前数据的高
* @return 镜像后的数据
*/
private static void MirrorI420(byte[] src, int w, int h) { //src是原始yuv数组
int i;
int index;
byte temp;
int a, b;
//mirror y
for (i = 0; i < h; i++) {
a = i * w;
b = (i + 1) * w - 1;
while (a < b) {
temp = src[a];
src[a] = src[b];
src[b] = temp;
a++;
b--;
}
}
//mirror u
index = w * h;//U起始位置
for (i = 0; i < h / 2; i++) {
a = i * w / 2;
b = (i + 1) * w / 2 - 1;
while (a < b) {
temp = src[a + index];
src[a + index] = src[b + index];
src[b + index] = temp;
a++;
b--;
}
}
//mirror v
index = w * h / 4 * 5;//V起始位置
for (i = 0; i < h / 2; i++) {
a = i * w / 2;
b = (i + 1) * w / 2 - 1;
while (a < b) {
temp = src[a + index];
src[a + index] = src[b + index];
src[b + index] = temp;
a++;
b--;
}
}
}

/**
* 进行镜像操作
* @param data 原始数据
* @param width 镜像前数据的宽
* @param height 镜像前数据的高
* @return 镜像后的数据
*/
public static byte[] frameMirror(byte[] data, int width, int height) {
byte tempData;
for (int i = 0; i < height * 3 / 2; i++) {
for (int j = 0; j < width / 2; j++) {
tempData = data[i * width + j];
data[i * width + j] = data[(i + 1) * width - 1 - j];
data[(i + 1) * width - 1 - j] = tempData;
}

}
return data;
}

//90度旋转
public static byte[] rotateYUV420SP(byte[] src, int width, int height) {
byte[] dst = new byte[src.length];
int wh = width * height;
Expand Down Expand Up @@ -337,17 +456,14 @@ public static byte[] I420Tonv21(byte[] i420bytes, int width, int height) {
private void decodeFramesToImage(MediaCodec decoder, MediaExtractor extractor, MediaFormat mediaFormat) {
boolean is_first = false;
long startWhen = 0;
XposedBridge.log("【VCAM】【decodeFramesToImage】1");
MediaCodec.BufferInfo info = new MediaCodec.BufferInfo();
XposedBridge.log("【VCAM】【decodeFramesToImage】2");
decoder.configure(mediaFormat, play_surf, null, 0);
boolean sawInputEOS = false;
boolean sawOutputEOS = false;
decoder.start();
XposedBridge.log("【VCAM】【decodeFramesToImage】3");
final int width = mediaFormat.getInteger(MediaFormat.KEY_WIDTH);
final int height = mediaFormat.getInteger(MediaFormat.KEY_HEIGHT);
XposedBridge.log("【VCAM】【decodeFramesToImage】4 width："+width+"h:"+height);
XposedBridge.log("【VCAM】【decodeFramesToImage】 width："+width+"h:"+height);
int outputFrameCount = 0;
while (!sawOutputEOS && !stopDecode) {
if (!sawInputEOS) {
Expand All @@ -365,15 +481,12 @@ private void decodeFramesToImage(MediaCodec decoder, MediaExtractor extractor, M
}
}
}
XposedBridge.log("【VCAM】【decodeFramesToImage】5");
int outputBufferId = decoder.dequeueOutputBuffer(info, DEFAULT_TIMEOUT_US);
XposedBridge.log("【VCAM】【decodeFramesToImage】6");
if (outputBufferId >= 0) {
if ((info.flags & MediaCodec.BUFFER_FLAG_END_OF_STREAM) != 0) {
XposedBridge.log("【VCAM】【decodeFramesToImage】 end");
sawOutputEOS = true;
}
XposedBridge.log("【VCAM】【decodeFramesToImage】7");
boolean doRender = (info.size != 0);
if (doRender) {
outputFrameCount++;
Expand All @@ -384,15 +497,10 @@ private void decodeFramesToImage(MediaCodec decoder, MediaExtractor extractor, M
startWhen = System.currentTimeMillis();
is_first = true;
}
XposedBridge.log("【VCAM】【decodeFramesToImage】8");
if (play_surf == null) {
XposedBridge.log("【VCAM】【decodeFramesToImage】9");
Image image = decoder.getOutputImage(outputBufferId);
XposedBridge.log("【VCAM】【decodeFramesToImage】10");
ByteBuffer buffer = image.getPlanes()[0].getBuffer();
XposedBridge.log("【VCAM】【decodeFramesToImage】11");
byte[] arr = new byte[buffer.remaining()];
XposedBridge.log("【VCAM】【decodeFramesToImage】12 arr"+arr.length);
buffer.get(arr);
if (mQueue != null) {
try {
Expand All @@ -401,44 +509,31 @@ private void decodeFramesToImage(MediaCodec decoder, MediaExtractor extractor, M
XposedBridge.log("【VCAM】" + e.toString());
}
}
XposedBridge.log("【VCAM】【decodeFramesToImage】13 ");
if (outputImageFormat != null) {
XposedBridge.log("【VCAM】【decodeFramesToImage】14 ");
XposedBridge.log("【VCAM】【decodeFramesToImage】14 getFormat()"+image.getFormat());

// I420Tonv21

byte[] buffer1=getDataFromImage(image, COLOR_FormatI420);
XposedBridge.log("【VCAM】【decodeFramesToImage】15 ");
// buffer1=rotateYUV420Degree90(buffer1,width,height);
XposedBridge.log("【VCAM】【decodeFramesToImage】15-2 ");
buffer1=I420Tonv21(buffer1,width,height);
XposedBridge.log("【VCAM】【decodeFramesToImage】16 ");
MirrorNv21(buffer1,width,height);
if(height>width)
{
//90度旋转
XposedBridge.log("【VCAM】【decodeFramesToImage】进行 90度旋转");
buffer1=rotateYUV420SP(buffer1,width,height);
}
XposedBridge.log("【VCAM】【decodeFramesToImage】17 ");
HookMain.data_buffer = buffer1;
}
XposedBridge.log("【VCAM】【decodeFramesToImage】18 ");
image.close();
}
long sleepTime = info.presentationTimeUs / 1000 - (System.currentTimeMillis() - startWhen);
XposedBridge.log("【VCAM】【decodeFramesToImage】19 ");
if (sleepTime > 0) {
try {
XposedBridge.log("【VCAM】【decodeFramesToImage】20 ");
Thread.sleep(sleepTime);
} catch (InterruptedException e) {
XposedBridge.log("【VCAM】" + e.toString());
XposedBridge.log("【VCAM】线程延迟出错");
}
}
XposedBridge.log("【VCAM】【decodeFramesToImage】21 ");
decoder.releaseOutputBuffer(outputBufferId, true);
XposedBridge.log("【VCAM】【decodeFramesToImage】22 ");
}
}
}
Expand Down

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