summaryrefslogtreecommitdiff
path: root/media/libwebp/dec/quant_dec.c
diff options
context:
space:
mode:
authorJeremy Andrews <athenian200@outlook.com>2021-09-25 16:51:20 -0500
committerJeremy Andrews <athenian200@outlook.com>2021-09-25 16:51:20 -0500
commit8279cddde6bde1b497c83c832c8a2b42cb7937e3 (patch)
treee99e1a875bce5f404f273e05633e3d39ef1befd5 /media/libwebp/dec/quant_dec.c
parent30ceeeff07a10bbd32ae64f33ae2a344e4fe433c (diff)
downloadaura-central-8279cddde6bde1b497c83c832c8a2b42cb7937e3.tar.gz
Issue %3003 - Move libwebp to libs/
Diffstat (limited to 'media/libwebp/dec/quant_dec.c')
-rw-r--r--media/libwebp/dec/quant_dec.c110
1 files changed, 0 insertions, 110 deletions
diff --git a/media/libwebp/dec/quant_dec.c b/media/libwebp/dec/quant_dec.c
deleted file mode 100644
index 6ecaf1c45..000000000
--- a/media/libwebp/dec/quant_dec.c
+++ /dev/null
@@ -1,110 +0,0 @@
-// Copyright 2010 Google Inc. All Rights Reserved.
-//
-// Use of this source code is governed by a BSD-style license
-// that can be found in the COPYING file in the root of the source
-// tree. An additional intellectual property rights grant can be found
-// in the file PATENTS. All contributing project authors may
-// be found in the AUTHORS file in the root of the source tree.
-// -----------------------------------------------------------------------------
-//
-// Quantizer initialization
-//
-// Author: Skal (pascal.massimino@gmail.com)
-
-#include "../dec/vp8i_dec.h"
-
-static WEBP_INLINE int clip(int v, int M) {
- return v < 0 ? 0 : v > M ? M : v;
-}
-
-// Paragraph 14.1
-static const uint8_t kDcTable[128] = {
- 4, 5, 6, 7, 8, 9, 10, 10,
- 11, 12, 13, 14, 15, 16, 17, 17,
- 18, 19, 20, 20, 21, 21, 22, 22,
- 23, 23, 24, 25, 25, 26, 27, 28,
- 29, 30, 31, 32, 33, 34, 35, 36,
- 37, 37, 38, 39, 40, 41, 42, 43,
- 44, 45, 46, 46, 47, 48, 49, 50,
- 51, 52, 53, 54, 55, 56, 57, 58,
- 59, 60, 61, 62, 63, 64, 65, 66,
- 67, 68, 69, 70, 71, 72, 73, 74,
- 75, 76, 76, 77, 78, 79, 80, 81,
- 82, 83, 84, 85, 86, 87, 88, 89,
- 91, 93, 95, 96, 98, 100, 101, 102,
- 104, 106, 108, 110, 112, 114, 116, 118,
- 122, 124, 126, 128, 130, 132, 134, 136,
- 138, 140, 143, 145, 148, 151, 154, 157
-};
-
-static const uint16_t kAcTable[128] = {
- 4, 5, 6, 7, 8, 9, 10, 11,
- 12, 13, 14, 15, 16, 17, 18, 19,
- 20, 21, 22, 23, 24, 25, 26, 27,
- 28, 29, 30, 31, 32, 33, 34, 35,
- 36, 37, 38, 39, 40, 41, 42, 43,
- 44, 45, 46, 47, 48, 49, 50, 51,
- 52, 53, 54, 55, 56, 57, 58, 60,
- 62, 64, 66, 68, 70, 72, 74, 76,
- 78, 80, 82, 84, 86, 88, 90, 92,
- 94, 96, 98, 100, 102, 104, 106, 108,
- 110, 112, 114, 116, 119, 122, 125, 128,
- 131, 134, 137, 140, 143, 146, 149, 152,
- 155, 158, 161, 164, 167, 170, 173, 177,
- 181, 185, 189, 193, 197, 201, 205, 209,
- 213, 217, 221, 225, 229, 234, 239, 245,
- 249, 254, 259, 264, 269, 274, 279, 284
-};
-
-//------------------------------------------------------------------------------
-// Paragraph 9.6
-
-void VP8ParseQuant(VP8Decoder* const dec) {
- VP8BitReader* const br = &dec->br_;
- const int base_q0 = VP8GetValue(br, 7);
- const int dqy1_dc = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0;
- const int dqy2_dc = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0;
- const int dqy2_ac = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0;
- const int dquv_dc = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0;
- const int dquv_ac = VP8Get(br) ? VP8GetSignedValue(br, 4) : 0;
-
- const VP8SegmentHeader* const hdr = &dec->segment_hdr_;
- int i;
-
- for (i = 0; i < NUM_MB_SEGMENTS; ++i) {
- int q;
- if (hdr->use_segment_) {
- q = hdr->quantizer_[i];
- if (!hdr->absolute_delta_) {
- q += base_q0;
- }
- } else {
- if (i > 0) {
- dec->dqm_[i] = dec->dqm_[0];
- continue;
- } else {
- q = base_q0;
- }
- }
- {
- VP8QuantMatrix* const m = &dec->dqm_[i];
- m->y1_mat_[0] = kDcTable[clip(q + dqy1_dc, 127)];
- m->y1_mat_[1] = kAcTable[clip(q + 0, 127)];
-
- m->y2_mat_[0] = kDcTable[clip(q + dqy2_dc, 127)] * 2;
- // For all x in [0..284], x*155/100 is bitwise equal to (x*101581) >> 16.
- // The smallest precision for that is '(x*6349) >> 12' but 16 is a good
- // word size.
- m->y2_mat_[1] = (kAcTable[clip(q + dqy2_ac, 127)] * 101581) >> 16;
- if (m->y2_mat_[1] < 8) m->y2_mat_[1] = 8;
-
- m->uv_mat_[0] = kDcTable[clip(q + dquv_dc, 117)];
- m->uv_mat_[1] = kAcTable[clip(q + dquv_ac, 127)];
-
- m->uv_quant_ = q + dquv_ac; // for dithering strength evaluation
- }
- }
-}
-
-//------------------------------------------------------------------------------
-