Initial community commit

Src/f263/Decoder.cpp

@@ -0,0 +1,133 @@
+#include "Decoder.h"
+
+
+bool Decoder::initted;
+unsigned char *Decoder::clp;
+unsigned char Decoder::clp_table[1024];
+
+int Decoder::DecodeFrame(YV12_PLANES *yv12, int *width, int *height, int *keyframe)
+{
+	if (getheader())
+	{
+		if (firstFrame)
+		{
+			if (init())
+				return 1;
+		}
+
+		Frame frame;
+		getpicture(frame);
+		yv12->y.baseAddr = frame[0];
+		yv12->y.rowBytes = coded_picture_width;
+		yv12->u.baseAddr = frame[1];
+		yv12->u.rowBytes = chrom_width;
+		yv12->v.baseAddr = frame[2];
+		yv12->v.rowBytes = chrom_width;
+
+		*width = horizontal_size;
+		*height = vertical_size;
+		*keyframe = (pict_type == PCT_INTRA)?1:0;
+
+		return 0;
+	}
+	return 1;
+}
+
+Decoder::Decoder()
+{
+	for (int cc=0; cc<3; cc++)
+	{
+		refframe[cc]=0;
+		newframe[cc]=0;
+		oldrefframe[cc]=0;
+		edgeframe[cc]=0;
+		edgeframeorig[cc]=0;
+	}
+
+	horizontal_size=0;
+	vertical_size=0;
+	mb_width=0;
+	mb_height=0;
+	coded_picture_width=0;
+	coded_picture_height=0;
+	chrom_width=0;
+	chrom_height=0;
+	pict_type=0;
+	fault=0;
+	refidct=0;
+	quant=0;
+	escapemode=0;
+
+	firstFrame=true;
+	if (!initted)
+	{
+		/* clip table */
+		clp=&clp_table[384];
+
+		for (int i=-384; i<640; i++)
+			clp[i] = (i<0) ? 0 : ((i>255) ? 255 : i);
+
+		initted=true;
+	}
+	idct.init();
+}
+
+Decoder::~Decoder()
+{
+	for (int cc=0; cc<3; cc++)
+	{
+		free(refframe[cc]);
+		free(oldrefframe[cc]);
+		free(edgeframeorig[cc]);
+	}
+}
+
+#define ROUNDUP16(size) (((size)+15) & ~15)
+
+int Decoder::init()
+{
+	int cc;
+	unsigned int size;
+
+	mb_width = (horizontal_size+15)/16;
+	mb_height = (vertical_size +15)/16;
+	coded_picture_width = ROUNDUP16(horizontal_size);
+	coded_picture_height = ROUNDUP16(vertical_size);
+	chrom_width =  coded_picture_width>>1;
+	chrom_height = coded_picture_height>>1;
+
+	if (coded_picture_width >= (65536 - 64)
+		|| coded_picture_height >= (65536 - 64))
+		return 1;
+
+	for (cc=0; cc<3; cc++)
+	{
+		if (cc==0)
+			size = coded_picture_width*coded_picture_height;
+		else
+			size = chrom_width*chrom_height;
+
+		refframe[cc] = (unsigned char *)malloc(size);
+		oldrefframe[cc] = (unsigned char *)malloc(size);
+	}
+
+	for (cc=0; cc<3; cc++)
+	{
+		if (cc==0)
+		{
+			size = (coded_picture_width+64)*(coded_picture_height+64);
+			edgeframeorig[cc] = (unsigned char *)malloc(size);
+
+			edgeframe[cc] = edgeframeorig[cc] + (coded_picture_width+64) * 32 + 32;
+		}
+		else
+		{
+			size = (chrom_width+32)*(chrom_height+32);
+			edgeframeorig[cc] = (unsigned char *)malloc(size);
+
+			edgeframe[cc] = edgeframeorig[cc] + (chrom_width+32) * 16 + 16;
+		}
+	}
+
+	return 0;
+}