core/jni/android/graphics/YuvToJpegEncoder.cpp - platform/frameworks/base.git - Git at Google

 #include "CreateJavaOutputStreamAdaptor.h"
 #include "SkJpegUtility.h"
 #include "YuvToJpegEncoder.h"
 #include <ui/PixelFormat.h>
 #include <hardware/hardware.h>

 #include <jni.h>

 YuvToJpegEncoder* YuvToJpegEncoder::create(int format, int* strides) {
     // Only ImageFormat.NV21 and ImageFormat.YUY2 are supported
     // for now.
     if (format == HAL_PIXEL_FORMAT_YCrCb_420_SP) {
         return new Yuv420SpToJpegEncoder(strides);
     } else if (format == HAL_PIXEL_FORMAT_YCbCr_422_I) {
         return new Yuv422IToJpegEncoder(strides);
     } else {
       return NULL;
     }
 }

 YuvToJpegEncoder::YuvToJpegEncoder(int* strides) : fStrides(strides) {
 }

 bool YuvToJpegEncoder::encode(SkWStream* stream, void* inYuv, int width,
         int height, int* offsets, int jpegQuality) {
     jpeg_compress_struct    cinfo;
     skjpeg_error_mgr        sk_err;
     skjpeg_destination_mgr  sk_wstream(stream);

     cinfo.err = jpeg_std_error(&sk_err);
     sk_err.error_exit = skjpeg_error_exit;
     if (setjmp(sk_err.fJmpBuf)) {
         return false;
     }
     jpeg_create_compress(&cinfo);

     cinfo.dest = &sk_wstream;

     setJpegCompressStruct(&cinfo, width, height, jpegQuality);

     jpeg_start_compress(&cinfo, TRUE);

     compress(&cinfo, (uint8_t*) inYuv, offsets);

     jpeg_finish_compress(&cinfo);

     return true;
 }

 void YuvToJpegEncoder::setJpegCompressStruct(jpeg_compress_struct* cinfo,
         int width, int height, int quality) {
     cinfo->image_width = width;
     cinfo->image_height = height;
     cinfo->input_components = 3;
     cinfo->in_color_space = JCS_YCbCr;
     jpeg_set_defaults(cinfo);

     jpeg_set_quality(cinfo, quality, TRUE);
     jpeg_set_colorspace(cinfo, JCS_YCbCr);
     cinfo->raw_data_in = TRUE;
     cinfo->dct_method = JDCT_IFAST;
     configSamplingFactors(cinfo);
 }

 ///////////////////////////////////////////////////////////////////
 Yuv420SpToJpegEncoder::Yuv420SpToJpegEncoder(int* strides) :
         YuvToJpegEncoder(strides) {
     fNumPlanes = 2;
 }

 void Yuv420SpToJpegEncoder::compress(jpeg_compress_struct* cinfo,
         uint8_t* yuv, int* offsets) {
     SkDebugf("onFlyCompress");
     JSAMPROW y[16];
     JSAMPROW cb[8];
     JSAMPROW cr[8];
     JSAMPARRAY planes[3];
     planes[0] = y;
     planes[1] = cb;
     planes[2] = cr;

     int width = cinfo->image_width;
     int height = cinfo->image_height;
     uint8_t* yPlanar = yuv + offsets[0];
     uint8_t* vuPlanar = yuv + offsets[1]; //width * height;
     uint8_t* uRows = new uint8_t [8 * (width >> 1)];
     uint8_t* vRows = new uint8_t [8 * (width >> 1)];


     // process 16 lines of Y and 8 lines of U/V each time.
     while (cinfo->next_scanline < cinfo->image_height) {
         //deitnerleave u and v
         deinterleave(vuPlanar, uRows, vRows, cinfo->next_scanline, width, height);

         // Jpeg library ignores the rows whose indices are greater than height.
         for (int i = 0; i < 16; i++) {
             // y row
             y[i] = yPlanar + (cinfo->next_scanline + i) * fStrides[0];

             // construct u row and v row
             if ((i & 1) == 0) {
                 // height and width are both halved because of downsampling
                 int offset = (i >> 1) * (width >> 1);
                 cb[i/2] = uRows + offset;
                 cr[i/2] = vRows + offset;
             }
           }
         jpeg_write_raw_data(cinfo, planes, 16);
     }
     delete [] uRows;
     delete [] vRows;

 }

 void Yuv420SpToJpegEncoder::deinterleave(uint8_t* vuPlanar, uint8_t* uRows,
         uint8_t* vRows, int rowIndex, int width, int height) {
     int numRows = (height - rowIndex) / 2;
     if (numRows > 8) numRows = 8;
     for (int row = 0; row < numRows; ++row) {
         int offset = ((rowIndex >> 1) + row) * fStrides[1];
         uint8_t* vu = vuPlanar + offset;
         for (int i = 0; i < (width >> 1); ++i) {
             int index = row * (width >> 1) + i;
             uRows[index] = vu[1];
             vRows[index] = vu[0];
             vu += 2;
         }
     }
 }

 void Yuv420SpToJpegEncoder::configSamplingFactors(jpeg_compress_struct* cinfo) {
     // cb and cr are horizontally downsampled and vertically downsampled as well.
     cinfo->comp_info[0].h_samp_factor = 2;
     cinfo->comp_info[0].v_samp_factor = 2;
     cinfo->comp_info[1].h_samp_factor = 1;
     cinfo->comp_info[1].v_samp_factor = 1;
     cinfo->comp_info[2].h_samp_factor = 1;
     cinfo->comp_info[2].v_samp_factor = 1;
 }

 ///////////////////////////////////////////////////////////////////////////////
 Yuv422IToJpegEncoder::Yuv422IToJpegEncoder(int* strides) :
         YuvToJpegEncoder(strides) {
     fNumPlanes = 1;
 }

 void Yuv422IToJpegEncoder::compress(jpeg_compress_struct* cinfo,
         uint8_t* yuv, int* offsets) {
     SkDebugf("onFlyCompress_422");
     JSAMPROW y[16];
     JSAMPROW cb[16];
     JSAMPROW cr[16];
     JSAMPARRAY planes[3];
     planes[0] = y;
     planes[1] = cb;
     planes[2] = cr;

     int width = cinfo->image_width;
     int height = cinfo->image_height;
     uint8_t* yRows = new uint8_t [16 * width];
     uint8_t* uRows = new uint8_t [16 * (width >> 1)];
     uint8_t* vRows = new uint8_t [16 * (width >> 1)];

     uint8_t* yuvOffset = yuv + offsets[0];

     // process 16 lines of Y and 16 lines of U/V each time.
     while (cinfo->next_scanline < cinfo->image_height) {
         deinterleave(yuvOffset, yRows, uRows, vRows, cinfo->next_scanline, width, height);

         // Jpeg library ignores the rows whose indices are greater than height.
         for (int i = 0; i < 16; i++) {
             // y row
             y[i] = yRows + i * width;

             // construct u row and v row
             // width is halved because of downsampling
             int offset = i * (width >> 1);
             cb[i] = uRows + offset;
             cr[i] = vRows + offset;
         }

         jpeg_write_raw_data(cinfo, planes, 16);
     }
     delete [] yRows;
     delete [] uRows;
     delete [] vRows;
 }


 void Yuv422IToJpegEncoder::deinterleave(uint8_t* yuv, uint8_t* yRows, uint8_t* uRows,
         uint8_t* vRows, int rowIndex, int width, int height) {
     int numRows = height - rowIndex;
     if (numRows > 16) numRows = 16;
     for (int row = 0; row < numRows; ++row) {
         uint8_t* yuvSeg = yuv + (rowIndex + row) * fStrides[0];
         for (int i = 0; i < (width >> 1); ++i) {
             int indexY = row * width + (i << 1);
             int indexU = row * (width >> 1) + i;
             yRows[indexY] = yuvSeg[0];
             yRows[indexY + 1] = yuvSeg[2];
             uRows[indexU] = yuvSeg[1];
             vRows[indexU] = yuvSeg[3];
             yuvSeg += 4;
         }
     }
 }

 void Yuv422IToJpegEncoder::configSamplingFactors(jpeg_compress_struct* cinfo) {
     // cb and cr are horizontally downsampled and vertically downsampled as well.
     cinfo->comp_info[0].h_samp_factor = 2;
     cinfo->comp_info[0].v_samp_factor = 2;
     cinfo->comp_info[1].h_samp_factor = 1;
     cinfo->comp_info[1].v_samp_factor = 2;
     cinfo->comp_info[2].h_samp_factor = 1;
     cinfo->comp_info[2].v_samp_factor = 2;
 }
 ///////////////////////////////////////////////////////////////////////////////

 static jboolean YuvImage_compressToJpeg(JNIEnv* env, jobject, jbyteArray inYuv,
         int format, int width, int height, jintArray offsets,
         jintArray strides, int jpegQuality, jobject jstream,
         jbyteArray jstorage) {
     jbyte* yuv = env->GetByteArrayElements(inYuv, NULL);
     SkWStream* strm = CreateJavaOutputStreamAdaptor(env, jstream, jstorage);

     jint* imgOffsets = env->GetIntArrayElements(offsets, NULL);
     jint* imgStrides = env->GetIntArrayElements(strides, NULL);
     YuvToJpegEncoder* encoder = YuvToJpegEncoder::create(format, imgStrides);
     if (encoder == NULL) {
         return false;
     }
     encoder->encode(strm, yuv, width, height, imgOffsets, jpegQuality);

     delete encoder;
     env->ReleaseByteArrayElements(inYuv, yuv, 0);
     env->ReleaseIntArrayElements(offsets, imgOffsets, 0);
     env->ReleaseIntArrayElements(strides, imgStrides, 0);
     return true;
 }
 ///////////////////////////////////////////////////////////////////////////////

 #include <android_runtime/AndroidRuntime.h>

 static JNINativeMethod gYuvImageMethods[] = {
     {   "nativeCompressToJpeg",  "([BIII[I[IILjava/io/OutputStream;[B)Z",
         (void*)YuvImage_compressToJpeg }
 };

 #define kClassPathName  "android/graphics/YuvImage"

 int register_android_graphics_YuvImage(JNIEnv* env)
 {
     return android::AndroidRuntime::registerNativeMethods(env, kClassPathName,
             gYuvImageMethods, SK_ARRAY_COUNT(gYuvImageMethods));
 }
	#include "CreateJavaOutputStreamAdaptor.h"
	#include "SkJpegUtility.h"
	#include "YuvToJpegEncoder.h"
	#include <ui/PixelFormat.h>
	#include <hardware/hardware.h>

	#include <jni.h>

	YuvToJpegEncoder* YuvToJpegEncoder::create(int format, int* strides) {
	// Only ImageFormat.NV21 and ImageFormat.YUY2 are supported
	// for now.
	if (format == HAL_PIXEL_FORMAT_YCrCb_420_SP) {
	return new Yuv420SpToJpegEncoder(strides);
	} else if (format == HAL_PIXEL_FORMAT_YCbCr_422_I) {
	return new Yuv422IToJpegEncoder(strides);
	} else {
	return NULL;
	}
	}

	YuvToJpegEncoder::YuvToJpegEncoder(int* strides) : fStrides(strides) {
	}

	bool YuvToJpegEncoder::encode(SkWStream* stream, void* inYuv, int width,
	int height, int* offsets, int jpegQuality) {
	jpeg_compress_struct cinfo;
	skjpeg_error_mgr sk_err;
	skjpeg_destination_mgr sk_wstream(stream);

	cinfo.err = jpeg_std_error(&sk_err);
	sk_err.error_exit = skjpeg_error_exit;
	if (setjmp(sk_err.fJmpBuf)) {
	return false;
	}
	jpeg_create_compress(&cinfo);

	cinfo.dest = &sk_wstream;

	setJpegCompressStruct(&cinfo, width, height, jpegQuality);

	jpeg_start_compress(&cinfo, TRUE);

	compress(&cinfo, (uint8_t*) inYuv, offsets);

	jpeg_finish_compress(&cinfo);

	return true;
	}

	void YuvToJpegEncoder::setJpegCompressStruct(jpeg_compress_struct* cinfo,
	int width, int height, int quality) {
	cinfo->image_width = width;
	cinfo->image_height = height;
	cinfo->input_components = 3;
	cinfo->in_color_space = JCS_YCbCr;
	jpeg_set_defaults(cinfo);

	jpeg_set_quality(cinfo, quality, TRUE);
	jpeg_set_colorspace(cinfo, JCS_YCbCr);
	cinfo->raw_data_in = TRUE;
	cinfo->dct_method = JDCT_IFAST;
	configSamplingFactors(cinfo);
	}

	///////////////////////////////////////////////////////////////////
	Yuv420SpToJpegEncoder::Yuv420SpToJpegEncoder(int* strides) :
	YuvToJpegEncoder(strides) {
	fNumPlanes = 2;
	}

	void Yuv420SpToJpegEncoder::compress(jpeg_compress_struct* cinfo,
	uint8_t* yuv, int* offsets) {
	SkDebugf("onFlyCompress");
	JSAMPROW y[16];
	JSAMPROW cb[8];
	JSAMPROW cr[8];
	JSAMPARRAY planes[3];
	planes[0] = y;
	planes[1] = cb;
	planes[2] = cr;

	int width = cinfo->image_width;
	int height = cinfo->image_height;
	uint8_t* yPlanar = yuv + offsets[0];
	uint8_t* vuPlanar = yuv + offsets[1]; //width * height;
	uint8_t* uRows = new uint8_t [8 * (width >> 1)];
	uint8_t* vRows = new uint8_t [8 * (width >> 1)];


	// process 16 lines of Y and 8 lines of U/V each time.
	while (cinfo->next_scanline < cinfo->image_height) {
	//deitnerleave u and v
	deinterleave(vuPlanar, uRows, vRows, cinfo->next_scanline, width, height);

	// Jpeg library ignores the rows whose indices are greater than height.
	for (int i = 0; i < 16; i++) {
	// y row
	y[i] = yPlanar + (cinfo->next_scanline + i) * fStrides[0];

	// construct u row and v row
	if ((i & 1) == 0) {
	// height and width are both halved because of downsampling
	int offset = (i >> 1) * (width >> 1);
	cb[i/2] = uRows + offset;
	cr[i/2] = vRows + offset;
	}
	}
	jpeg_write_raw_data(cinfo, planes, 16);
	}
	delete [] uRows;
	delete [] vRows;

	}

	void Yuv420SpToJpegEncoder::deinterleave(uint8_t* vuPlanar, uint8_t* uRows,
	uint8_t* vRows, int rowIndex, int width, int height) {
	int numRows = (height - rowIndex) / 2;
	if (numRows > 8) numRows = 8;
	for (int row = 0; row < numRows; ++row) {
	int offset = ((rowIndex >> 1) + row) * fStrides[1];
	uint8_t* vu = vuPlanar + offset;
	for (int i = 0; i < (width >> 1); ++i) {
	int index = row * (width >> 1) + i;
	uRows[index] = vu[1];
	vRows[index] = vu[0];
	vu += 2;
	}
	}
	}

	void Yuv420SpToJpegEncoder::configSamplingFactors(jpeg_compress_struct* cinfo) {
	// cb and cr are horizontally downsampled and vertically downsampled as well.
	cinfo->comp_info[0].h_samp_factor = 2;
	cinfo->comp_info[0].v_samp_factor = 2;
	cinfo->comp_info[1].h_samp_factor = 1;
	cinfo->comp_info[1].v_samp_factor = 1;
	cinfo->comp_info[2].h_samp_factor = 1;
	cinfo->comp_info[2].v_samp_factor = 1;
	}

	///////////////////////////////////////////////////////////////////////////////
	Yuv422IToJpegEncoder::Yuv422IToJpegEncoder(int* strides) :
	YuvToJpegEncoder(strides) {
	fNumPlanes = 1;
	}

	void Yuv422IToJpegEncoder::compress(jpeg_compress_struct* cinfo,
	uint8_t* yuv, int* offsets) {
	SkDebugf("onFlyCompress_422");
	JSAMPROW y[16];
	JSAMPROW cb[16];
	JSAMPROW cr[16];
	JSAMPARRAY planes[3];
	planes[0] = y;
	planes[1] = cb;
	planes[2] = cr;

	int width = cinfo->image_width;
	int height = cinfo->image_height;
	uint8_t* yRows = new uint8_t [16 * width];
	uint8_t* uRows = new uint8_t [16 * (width >> 1)];
	uint8_t* vRows = new uint8_t [16 * (width >> 1)];

	uint8_t* yuvOffset = yuv + offsets[0];

	// process 16 lines of Y and 16 lines of U/V each time.
	while (cinfo->next_scanline < cinfo->image_height) {
	deinterleave(yuvOffset, yRows, uRows, vRows, cinfo->next_scanline, width, height);

	// Jpeg library ignores the rows whose indices are greater than height.
	for (int i = 0; i < 16; i++) {
	// y row
	y[i] = yRows + i * width;

	// construct u row and v row
	// width is halved because of downsampling
	int offset = i * (width >> 1);
	cb[i] = uRows + offset;
	cr[i] = vRows + offset;
	}

	jpeg_write_raw_data(cinfo, planes, 16);
	}
	delete [] yRows;
	delete [] uRows;
	delete [] vRows;
	}


	void Yuv422IToJpegEncoder::deinterleave(uint8_t* yuv, uint8_t* yRows, uint8_t* uRows,
	uint8_t* vRows, int rowIndex, int width, int height) {
	int numRows = height - rowIndex;
	if (numRows > 16) numRows = 16;
	for (int row = 0; row < numRows; ++row) {
	uint8_t* yuvSeg = yuv + (rowIndex + row) * fStrides[0];
	for (int i = 0; i < (width >> 1); ++i) {
	int indexY = row * width + (i << 1);
	int indexU = row * (width >> 1) + i;
	yRows[indexY] = yuvSeg[0];
	yRows[indexY + 1] = yuvSeg[2];
	uRows[indexU] = yuvSeg[1];
	vRows[indexU] = yuvSeg[3];
	yuvSeg += 4;
	}
	}
	}

	void Yuv422IToJpegEncoder::configSamplingFactors(jpeg_compress_struct* cinfo) {
	// cb and cr are horizontally downsampled and vertically downsampled as well.
	cinfo->comp_info[0].h_samp_factor = 2;
	cinfo->comp_info[0].v_samp_factor = 2;
	cinfo->comp_info[1].h_samp_factor = 1;
	cinfo->comp_info[1].v_samp_factor = 2;
	cinfo->comp_info[2].h_samp_factor = 1;
	cinfo->comp_info[2].v_samp_factor = 2;
	}
	///////////////////////////////////////////////////////////////////////////////

	static jboolean YuvImage_compressToJpeg(JNIEnv* env, jobject, jbyteArray inYuv,
	int format, int width, int height, jintArray offsets,
	jintArray strides, int jpegQuality, jobject jstream,
	jbyteArray jstorage) {
	jbyte* yuv = env->GetByteArrayElements(inYuv, NULL);
	SkWStream* strm = CreateJavaOutputStreamAdaptor(env, jstream, jstorage);

	jint* imgOffsets = env->GetIntArrayElements(offsets, NULL);
	jint* imgStrides = env->GetIntArrayElements(strides, NULL);
	YuvToJpegEncoder* encoder = YuvToJpegEncoder::create(format, imgStrides);
	if (encoder == NULL) {
	return false;
	}
	encoder->encode(strm, yuv, width, height, imgOffsets, jpegQuality);

	delete encoder;
	env->ReleaseByteArrayElements(inYuv, yuv, 0);
	env->ReleaseIntArrayElements(offsets, imgOffsets, 0);
	env->ReleaseIntArrayElements(strides, imgStrides, 0);
	return true;
	}
	///////////////////////////////////////////////////////////////////////////////

	#include <android_runtime/AndroidRuntime.h>

	static JNINativeMethod gYuvImageMethods[] = {
	{ "nativeCompressToJpeg", "([BIII[I[IILjava/io/OutputStream;[B)Z",
	(void*)YuvImage_compressToJpeg }
	};

	#define kClassPathName "android/graphics/YuvImage"

	int register_android_graphics_YuvImage(JNIEnv* env)
	{
	return android::AndroidRuntime::registerNativeMethods(env, kClassPathName,
	gYuvImageMethods, SK_ARRAY_COUNT(gYuvImageMethods));
	}