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51 lines
1.3 KiB
C
51 lines
1.3 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 VP9_COMMON_VP9_FILTER_H_
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#define VP9_COMMON_VP9_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_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 FILTER_BITS 7
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#define SUBPEL_BITS 4
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#define SUBPEL_MASK ((1 << SUBPEL_BITS) - 1)
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#define SUBPEL_SHIFTS (1 << SUBPEL_BITS)
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#define SUBPEL_TAPS 8
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typedef enum {
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EIGHTTAP = 0,
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EIGHTTAP_SMOOTH = 1,
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EIGHTTAP_SHARP = 2,
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SWITCHABLE_FILTERS = 3, /* Number of switchable filters */
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BILINEAR = 3,
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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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SWITCHABLE_FILTER_CONTEXTS = SWITCHABLE_FILTERS + 1,
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SWITCHABLE = 4 /* should be the last one */
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} INTERP_FILTER;
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typedef int16_t InterpKernel[SUBPEL_TAPS];
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const InterpKernel *vp9_get_interp_kernel(INTERP_FILTER filter);
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#ifdef __cplusplus
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} // extern "C"
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#endif
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#endif // VP9_COMMON_VP9_FILTER_H_
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