97 строки
2.7 KiB
C
97 строки
2.7 KiB
C
/*
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* Copyright (c) 2011 The WebM project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef VP10_COMMON_FILTER_H_
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#define VP10_COMMON_FILTER_H_
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#include "./vpx_config.h"
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#include "vpx/vpx_integer.h"
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#include "vpx_dsp/vpx_filter.h"
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#include "vpx_ports/mem.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define EIGHTTAP_REGULAR 0
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#define EIGHTTAP_SMOOTH 1
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#define MULTITAP_SHARP 2
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#if CONFIG_EXT_INTERP
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#define MAX_SUBPEL_TAPS 12
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#define SUPPORT_NONINTERPOLATING_FILTERS 0 /* turn it on for experimentation */
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#define SWITCHABLE_FILTERS 5 /* Number of switchable filters */
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#if SWITCHABLE_FILTERS >= 4
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#define EIGHTTAP_SMOOTH2 3
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#endif
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#if SWITCHABLE_FILTERS == 5
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#define MULTITAP_SHARP2 4
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#endif // SWITCHABLE_FILTERS
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#else
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#define SWITCHABLE_FILTERS 3 /* Number of switchable filters */
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#endif // CONFIG_EXT_INTERP
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#define USE_TEMPORALFILTER_12TAP 1
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#if USE_TEMPORALFILTER_12TAP
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#define TEMPORALFILTER_12TAP (SWITCHABLE_FILTERS + 1)
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#endif
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// The codec can operate in four possible inter prediction filter mode:
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// 8-tap, 8-tap-smooth, 8-tap-sharp, and switching between the three.
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#define BILINEAR (SWITCHABLE_FILTERS)
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#define SWITCHABLE (SWITCHABLE_FILTERS + 1) /* the last one */
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#define SWITCHABLE_FILTER_CONTEXTS (SWITCHABLE_FILTERS + 1)
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typedef uint8_t INTERP_FILTER;
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#if CONFIG_EXT_INTRA
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typedef enum {
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INTRA_FILTER_LINEAR,
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INTRA_FILTER_8TAP,
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INTRA_FILTER_8TAP_SHARP,
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INTRA_FILTER_8TAP_SMOOTH,
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INTRA_FILTERS,
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} INTRA_FILTER;
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extern const InterpKernel *vp10_intra_filter_kernels[INTRA_FILTERS];
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#endif // CONFIG_EXT_INTRA
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typedef struct InterpFilterParams {
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const int16_t* filter_ptr;
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uint16_t taps;
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uint16_t subpel_shifts;
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} InterpFilterParams;
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InterpFilterParams vp10_get_interp_filter_params(
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const INTERP_FILTER interp_filter);
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const int16_t *vp10_get_interp_filter_kernel(
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const INTERP_FILTER interp_filter);
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static INLINE const int16_t* vp10_get_interp_filter_subpel_kernel(
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const InterpFilterParams filter_params, const int subpel) {
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return filter_params.filter_ptr + filter_params.taps * subpel;
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}
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static INLINE int vp10_is_interpolating_filter(
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const INTERP_FILTER interp_filter) {
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const InterpFilterParams ip = vp10_get_interp_filter_params(interp_filter);
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return (ip.filter_ptr[ip.taps / 2 - 1] == 128);
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP10_COMMON_FILTER_H_
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