c456b35fdf
This adds Debargha's DCT/DWT hybrid and a regular 32x32 DCT, and adds code all over the place to wrap that in the bitstream/encoder/decoder/RD. Some implementation notes (these probably need careful review): - token range is extended by 1 bit, since the value range out of this transform is [-16384,16383]. - the coefficients coming out of the FDCT are manually scaled back by 1 bit, or else they won't fit in int16_t (they are 17 bits). Because of this, the RD error scoring does not right-shift the MSE score by two (unlike for 4x4/8x8/16x16). - to compensate for this loss in precision, the quantizer is halved also. This is currently a little hacky. - FDCT and IDCT is double-only right now. Needs a fixed-point impl. - There are no default probabilities for the 32x32 transform yet; I'm simply using the 16x16 luma ones. A future commit will add newly generated probabilities for all transforms. - No ADST version. I don't think we'll add one for this level; if an ADST is desired, transform-size selection can scale back to 16x16 or lower, and use an ADST at that level. Additional notes specific to Debargha's DWT/DCT hybrid: - coefficient scale is different for the top/left 16x16 (DCT-over-DWT) block than for the rest (DWT pixel differences) of the block. Therefore, RD error scoring isn't easily scalable between coefficient and pixel domain. Thus, unfortunately, we need to compute the RD distortion in the pixel domain until we figure out how to scale these appropriately. Change-Id: I00386f20f35d7fabb19aba94c8162f8aee64ef2b
47 lines
1.6 KiB
C
47 lines
1.6 KiB
C
/*
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* Copyright (c) 2010 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_INVTRANS_H_
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#define VP9_COMMON_VP9_INVTRANS_H_
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#include "vpx_ports/config.h"
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#include "vp9/common/vp9_blockd.h"
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extern void vp9_inverse_transform_b_4x4(MACROBLOCKD *xd, int block, int pitch);
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extern void vp9_inverse_transform_mb_4x4(MACROBLOCKD *xd);
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extern void vp9_inverse_transform_mby_4x4(MACROBLOCKD *xd);
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extern void vp9_inverse_transform_mbuv_4x4(MACROBLOCKD *xd);
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extern void vp9_inverse_transform_b_8x8(short *input_dqcoeff,
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short *output_coeff, int pitch);
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extern void vp9_inverse_transform_mb_8x8(MACROBLOCKD *xd);
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extern void vp9_inverse_transform_mby_8x8(MACROBLOCKD *xd);
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extern void vp9_inverse_transform_mbuv_8x8(MACROBLOCKD *xd);
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extern void vp9_inverse_transform_b_16x16(short *input_dqcoeff,
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short *output_coeff, int pitch);
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extern void vp9_inverse_transform_mb_16x16(MACROBLOCKD *xd);
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extern void vp9_inverse_transform_mby_16x16(MACROBLOCKD *xd);
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#if CONFIG_TX32X32 && CONFIG_SUPERBLOCKS
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extern void vp9_inverse_transform_sby_32x32(SUPERBLOCKD *xd_sb);
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extern void vp9_inverse_transform_sbuv_16x16(SUPERBLOCKD *xd_sb);
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#endif
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#endif // __INC_INVTRANS_H
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