61 lines
2.0 KiB
C
61 lines
2.0 KiB
C
|
#ifndef YuvToJpegEncoder_DEFINED
|
||
|
|
#define YuvToJpegEncoder_DEFINED
|
||
|
|
|
||
|
|
extern "C" {
|
||
|
|
#include "jpeglib.h"
|
||
|
|
#include "jerror.h"
|
||
|
|
}
|
||
|
|
|
||
|
|
class YuvToJpegEncoder {
|
||
|
|
public:
|
||
|
|
/** Create an encoder based on the YUV format.
|
||
|
|
*
|
||
|
|
* @param pixelFormat The yuv pixel format as defined in ui/PixelFormat.h.
|
||
|
|
* @param strides The number of row bytes in each image plane.
|
||
|
|
* @return an encoder based on the pixelFormat.
|
||
|
|
*/
|
||
|
|
static YuvToJpegEncoder* create(int* strides);
|
||
|
|
|
||
|
|
YuvToJpegEncoder(int* strides);
|
||
|
|
|
||
|
|
/** Encode YUV data to jpeg, which is output to a stream.
|
||
|
|
*
|
||
|
|
* @param dest The jpeg output stream.
|
||
|
|
* @param inYuv The input yuv data.
|
||
|
|
* @param width Width of the the Yuv data in terms of pixels.
|
||
|
|
* @param height Height of the Yuv data in terms of pixels.
|
||
|
|
* @param offsets The offsets in each image plane with respect to inYuv.
|
||
|
|
* @param jpegQuality Picture quality in [0, 100].
|
||
|
|
* @return true if successfully compressed the stream.
|
||
|
|
*/
|
||
|
|
bool encode(unsigned char* dest, void* inYuv, int width,
|
||
|
|
int height, int* offsets, int jpegQuality);
|
||
|
|
|
||
|
|
virtual ~YuvToJpegEncoder() {}
|
||
|
|
|
||
|
|
protected:
|
||
|
|
int fNumPlanes;
|
||
|
|
int* fStrides;
|
||
|
|
void setJpegCompressStruct(jpeg_compress_struct* cinfo, int width,
|
||
|
|
int height, int quality);
|
||
|
|
virtual void configSamplingFactors(jpeg_compress_struct* cinfo) = 0;
|
||
|
|
virtual void compress(jpeg_compress_struct* cinfo,
|
||
|
|
uint8_t* yuv, int* offsets) = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
class Yuv420SpToJpegEncoder : public YuvToJpegEncoder {
|
||
|
|
public:
|
||
|
|
Yuv420SpToJpegEncoder(int* strides);
|
||
|
|
virtual ~Yuv420SpToJpegEncoder() {}
|
||
|
|
|
||
|
|
private:
|
||
|
|
void configSamplingFactors(jpeg_compress_struct* cinfo);
|
||
|
|
void deinterleaveYuv(uint8_t* yuv, int width, int height,
|
||
|
|
uint8_t*& yPlanar, uint8_t*& uPlanar, uint8_t*& vPlanar);
|
||
|
|
void deinterleave(uint8_t* vuPlanar, uint8_t* uRows, uint8_t* vRows,
|
||
|
|
int rowIndex, int width);
|
||
|
|
void compress(jpeg_compress_struct* cinfo, uint8_t* yuv, int* offsets);
|
||
|
|
};
|
||
|
|
|
||
|
|
#endif
|