diff options
Diffstat (limited to 'drivers/webpold/dec/quant.c')
| -rw-r--r-- | drivers/webpold/dec/quant.c | 113 |
1 files changed, 0 insertions, 113 deletions
diff --git a/drivers/webpold/dec/quant.c b/drivers/webpold/dec/quant.c deleted file mode 100644 index d54097af0d..0000000000 --- a/drivers/webpold/dec/quant.c +++ /dev/null @@ -1,113 +0,0 @@ -// Copyright 2010 Google Inc. All Rights Reserved. -// -// This code is licensed under the same terms as WebM: -// Software License Agreement: http://www.webmproject.org/license/software/ -// Additional IP Rights Grant: http://www.webmproject.org/license/additional/ -// ----------------------------------------------------------------------------- -// -// Quantizer initialization -// -// Author: Skal (pascal.massimino@gmail.com) - -#include "./vp8i.h" - -#if defined(__cplusplus) || defined(c_plusplus) -extern "C" { -#endif - -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)]; - } - } -} - -//------------------------------------------------------------------------------ - -#if defined(__cplusplus) || defined(c_plusplus) -} // extern "C" -#endif |