CTandroidAV.java 文件源码

byte[] jpegFromPreview(byte[] currentPreview) {

        ByteArrayOutputStream baos = new ByteArrayOutputStream();

        Parameters parameters = mCamera.getParameters();
        Size size = parameters.getPreviewSize();
        YuvImage image = new YuvImage(currentPreview, parameters.getPreviewFormat(), size.width, size.height, null);

        image.compressToJpeg(new Rect(0, 0, image.getWidth(), image.getHeight()), quality, baos);

        byte[] jpeg = baos.toByteArray();
        float rotation = (float) 0.;
        if (cameraId == 1 && mDisplay.getRotation() == Surface.ROTATION_0)
                rotation = (float) 270.;
        else if (cameraId == 0 && mDisplay.getRotation() == Surface.ROTATION_0)
                rotation = (float) 90.;

        if (debug) Log.i(TAG, "cameraId: " + cameraId + ", getRotation: " + mDisplay.getRotation() + ", rotation: " + rotation);

        if (rotation != 0.) {
            // This is the same image as the preview but in JPEG and not rotated
            Bitmap bitmap = BitmapFactory.decodeByteArray(jpeg, 0, jpeg.length);
            ByteArrayOutputStream rotatedStream = new ByteArrayOutputStream();

            // Rotate the Bitmap
            Matrix matrix = new Matrix();
            matrix.postRotate(rotation);

            // We rotate the same Bitmap
            bitmap = Bitmap.createBitmap(bitmap, 0, 0, image.getWidth(), image.getHeight(), matrix, false);

            // We dump the rotated Bitmap to the stream
            bitmap.compress(CompressFormat.JPEG, 50, rotatedStream);
            jpeg = rotatedStream.toByteArray();
            // whew
        }
        return jpeg;
    }