| /external/tensorflow/tensorflow/python/ops/signal/ |
| dct_ops.py | 32 """Checks that DCT/IDCT arguments are compatible and well formed."""
152 @tf_export("signal.idct", v1=["signal.idct", "spectral.idct"])
153 def idct(input, type=2, n=None, axis=-1, norm=None, name=None): # pylint: disable=redefined-builtin function
154 """Computes the 1D [Inverse Discrete Cosine Transform (DCT)][idct] of `input`.
161 `signal == idct(dct(signal)) * 0.5 / signal.shape[-1]`.
163 `signal == idct(dct(signal, norm='ortho'), norm='ortho')`.
166 Equivalent to scipy.fftpack.idct for Type-I, Type-II and Type-III DCT.
167 https://docs.scipy.org/doc/scipy-0.14.0/reference/generated/scipy.fftpack.idct.htm
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| /frameworks/av/media/libstagefright/codecs/m4v_h263/dec/src/ |
| idct.cpp | 24 inverse discrete cosine transform (IDCT).
32 #include "idct.h"
38 FUNCTION NAME: idct
40 INPUT AND OUTPUT DEFINITIONS FOR idct
57 blk points to the found IDCT values for an 8r8 image block.
66 FUNCTION DESCRIPTION FOR idct
70 dimensional inverse discrete cosine transform (IDCT).
80 2-D IDCT can be separated as horizontal(row-wise) and vertical(column-wise)
81 1-D IDCTs. Therefore, 2-D IDCT values are found by the following two steps:
82 1. Find horizontal 1-D IDCT values for each row from 8r8 dequantized DC
344 void idct( function
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| /external/libjpeg-turbo/ |
| jddctmgr.c | 15 * This code selects a particular IDCT implementation to be used,
17 * is executed per IDCT step, only during output pass setup.
19 * Note that the IDCT routines are responsible for performing coefficient
20 * dequantization as well as the IDCT proper. This module sets up the
21 * dequantization multiplier table needed by the IDCT routine.
38 * to a multiplier table that will actually be used by the IDCT routine.
39 * The multiplier table contents are IDCT-method-dependent. To support
40 * application changes in IDCT method between scans, we can remake the
45 * to zeroes; the result of the IDCT will be a neutral gray level.
54 /* This array contains the IDCT method code that each multiplier tabl
99 my_idct_ptr idct = (my_idct_ptr)cinfo->idct; local
332 my_idct_ptr idct; local
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| jpeglib.h | 146 * reflecting any scaling we choose to apply during the IDCT step.
148 * Note that different components may receive different IDCT scalings.
159 * and similarly for height. For decompression, IDCT scaling is included, so
185 /* Private per-component storage for DCT or IDCT subsystem. */
244 /* DCT/IDCT algorithm options. */
500 J_DCT_METHOD dct_method; /* IDCT algorithm selector */
654 * rows of each component. Therefore, the IDCT output contains
703 struct jpeg_inverse_dct *idct; member in struct:jpeg_decompress_struct
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| /external/mesa3d/src/gallium/auxiliary/vl/ |
| vl_mpeg12_decoder.h | 97 struct vl_idct_buffer idct[VL_NUM_COMPONENTS]; member in struct:vl_mpeg12_buffer
|
| vl_mpeg12_decoder.c | 257 &buffer->idct[i], idct_source_sv[i],
265 vl_idct_cleanup_buffer(&buffer->idct[i - 1]);
280 vl_idct_cleanup_buffer(&buf->idct[i]);
812 vl_idct_flush(i ? &dec->idct_c : &dec->idct_y, &buf->idct[i], buf->num_ycbcr_blocks[i]);
829 vl_idct_prepare_stage2(i ? &dec->idct_c : &dec->idct_y, &buf->idct[plane]);
1076 struct vl_idct *idct = mc == &dec->mc_y ? &dec->idct_y : &dec->idct_c; local
1097 struct vl_idct *idct = mc == &dec->mc_y ? &dec->idct_y : &dec->idct_c; local
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| /cts/apps/CtsVerifier/libs/ |
| opencv3-android.jar | |
