Lines Matching +full:int16 +full:- +full:array

5  * Copyright (C) 1994-1996, Thomas G. Lane.
6  * libjpeg-turbo Modifications:
15  * machine-dependent tuning (e.g., assembly coding).
21  * the DCT is to be performed in-place in that buffer.  Type DCTELEM is int
22  * for 8-bit samples, JLONG for 12-bit samples.  (NOTE: Floating-point DCT
23  * implementations use an array of type FAST_FLOAT, instead.)
24  * The DCT inputs are expected to be signed (range +-CENTERJSAMPLE).
26  * have a range of +-8K for 8-bit data, +-128K for 12-bit data.  This
28  * work in floating-point ones.
51  * to an output sample array.  The routine must dequantize the input data as
53  * pointed to by compptr->dct_table.  The output data is to be placed into the
54  * sample array starting at a specified column.  (Any row offset needed will
55  * be applied to the array pointer before it is passed to the IDCT code.)
78  * Each IDCT routine is responsible for range-limiting its results and
81  * range-limiting step is required.  We use a mask-and-table-lookup method
86 #define IDCT_range_limit(cinfo)  ((cinfo)->sample_range_limit + CENTERJSAMPLE)
154  * Macros for handling fixed-point arithmetic; these are used by many
168  * thus causing a lot of useless floating-point operations at run time.
178 #define DESCALE(x, n)  RIGHT_SHIFT((x) + (ONE << ((n) - 1)), n)
182  * 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a
184  * Unfortunately there is no way to specify a 16x16->32 multiply portably
190 #define MULTIPLY16C16(var, const)  (((INT16)(var)) * ((INT16)(const)))
193 #define MULTIPLY16C16(var, const)  (((INT16)(var)) * ((JLONG)(const)))
203 #define MULTIPLY16V16(var1, var2)  (((INT16)(var1)) * ((INT16)(var2)))