Line data    Source code

       1             : /*
       2             :  * Copyright (c) 2016, Alliance for Open Media. All rights reserved
       3             :  *
       4             :  * This source code is subject to the terms of the BSD 2 Clause License and
       5             :  * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
       6             :  * was not distributed with this source code in the LICENSE file, you can
       7             :  * obtain it at www.aomedia.org/license/software. If the Alliance for Open
       8             :  * Media Patent License 1.0 was not distributed with this source code in the
       9             :  * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
      10             :  */
      11             : 
      12             : #ifndef AOM_DSP_INV_TXFM_H_
      13             : #define AOM_DSP_INV_TXFM_H_
      14             : 
      15             : #include <assert.h>
      16             : 
      17             : #include "./aom_config.h"
      18             : #include "aom_dsp/txfm_common.h"
      19             : #include "aom_ports/mem.h"
      20             : 
      21             : #ifdef __cplusplus
      22             : extern "C" {
      23             : #endif
      24             : 
      25           0 : static INLINE tran_high_t dct_const_round_shift(tran_high_t input) {
      26           0 :   tran_high_t rv = ROUND_POWER_OF_TWO(input, DCT_CONST_BITS);
      27           0 :   return rv;
      28             : }
      29             : 
      30           0 : static INLINE tran_high_t check_range(tran_high_t input, int bd) {
      31             : #if CONFIG_COEFFICIENT_RANGE_CHECKING
      32             :   // For valid AV1 input streams, intermediate stage coefficients should always
      33             :   // stay within the range of a signed 16 bit integer. Coefficients can go out
      34             :   // of this range for invalid/corrupt AV1 streams. However, strictly checking
      35             :   // this range for every intermediate coefficient can burdensome for a decoder,
      36             :   // therefore the following assertion is only enabled when configured with
      37             :   // --enable-coefficient-range-checking.
      38             :   // For valid highbitdepth AV1 streams, intermediate stage coefficients will
      39             :   // stay within the ranges:
      40             :   // - 8 bit: signed 16 bit integer
      41             :   // - 10 bit: signed 18 bit integer
      42             :   // - 12 bit: signed 20 bit integer
      43             :   const int32_t int_max = (1 << (7 + bd)) - 1;
      44             :   const int32_t int_min = -int_max - 1;
      45             :   assert(int_min <= input);
      46             :   assert(input <= int_max);
      47             :   (void)int_min;
      48             : #endif  // CONFIG_COEFFICIENT_RANGE_CHECKING
      49             :   (void)bd;
      50           0 :   return input;
      51             : }
      52             : 
      53             : #define WRAPLOW(x) ((int32_t)check_range(x, 8))
      54             : #if CONFIG_HIGHBITDEPTH
      55             : #define HIGHBD_WRAPLOW(x, bd) ((int32_t)check_range((x), bd))
      56             : #endif  // CONFIG_HIGHBITDEPTH
      57             : 
      58             : void aom_idct4_c(const tran_low_t *input, tran_low_t *output);
      59             : void aom_idct8_c(const tran_low_t *input, tran_low_t *output);
      60             : void aom_idct16_c(const tran_low_t *input, tran_low_t *output);
      61             : void aom_idct32_c(const tran_low_t *input, tran_low_t *output);
      62             : void aom_iadst4_c(const tran_low_t *input, tran_low_t *output);
      63             : void aom_iadst8_c(const tran_low_t *input, tran_low_t *output);
      64             : void aom_iadst16_c(const tran_low_t *input, tran_low_t *output);
      65             : 
      66             : #if CONFIG_HIGHBITDEPTH
      67             : void aom_highbd_idct4_c(const tran_low_t *input, tran_low_t *output, int bd);
      68             : void aom_highbd_idct8_c(const tran_low_t *input, tran_low_t *output, int bd);
      69             : void aom_highbd_idct16_c(const tran_low_t *input, tran_low_t *output, int bd);
      70             : void aom_highbd_idct32_c(const tran_low_t *input, tran_low_t *output, int bd);
      71             : 
      72             : void aom_highbd_iadst4_c(const tran_low_t *input, tran_low_t *output, int bd);
      73             : void aom_highbd_iadst8_c(const tran_low_t *input, tran_low_t *output, int bd);
      74             : void aom_highbd_iadst16_c(const tran_low_t *input, tran_low_t *output, int bd);
      75             : 
      76           0 : static INLINE uint16_t highbd_clip_pixel_add(uint16_t dest, tran_high_t trans,
      77             :                                              int bd) {
      78           0 :   trans = HIGHBD_WRAPLOW(trans, bd);
      79           0 :   return clip_pixel_highbd(dest + (int)trans, bd);
      80             : }
      81             : #endif
      82             : 
      83           0 : static INLINE uint8_t clip_pixel_add(uint8_t dest, tran_high_t trans) {
      84           0 :   trans = WRAPLOW(trans);
      85           0 :   return clip_pixel(dest + (int)trans);
      86             : }
      87             : #ifdef __cplusplus
      88             : }  // extern "C"
      89             : #endif
      90             : 
      91             : #endif  // AOM_DSP_INV_TXFM_H_