diff options
Diffstat (limited to 'thirdparty/libvpx/vp8/decoder/detokenize.c')
| -rw-r--r-- | thirdparty/libvpx/vp8/decoder/detokenize.c | 245 |
1 files changed, 0 insertions, 245 deletions
diff --git a/thirdparty/libvpx/vp8/decoder/detokenize.c b/thirdparty/libvpx/vp8/decoder/detokenize.c deleted file mode 100644 index fcc7533c50..0000000000 --- a/thirdparty/libvpx/vp8/decoder/detokenize.c +++ /dev/null @@ -1,245 +0,0 @@ -/* - * Copyright (c) 2010 The WebM project authors. All Rights Reserved. - * - * Use of this source code is governed by a BSD-style license - * that can be found in the LICENSE 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. - */ - - -#include "vp8/common/blockd.h" -#include "onyxd_int.h" -#include "vpx_mem/vpx_mem.h" -#include "vpx_ports/mem.h" -#include "detokenize.h" - -void vp8_reset_mb_tokens_context(MACROBLOCKD *x) -{ - ENTROPY_CONTEXT *a_ctx = ((ENTROPY_CONTEXT *)x->above_context); - ENTROPY_CONTEXT *l_ctx = ((ENTROPY_CONTEXT *)x->left_context); - - memset(a_ctx, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1); - memset(l_ctx, 0, sizeof(ENTROPY_CONTEXT_PLANES)-1); - - /* Clear entropy contexts for Y2 blocks */ - if (!x->mode_info_context->mbmi.is_4x4) - { - a_ctx[8] = l_ctx[8] = 0; - } -} - -/* - ------------------------------------------------------------------------------ - Residual decoding (Paragraph 13.2 / 13.3) -*/ -static const uint8_t kBands[16 + 1] = { - 0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7, - 0 /* extra entry as sentinel */ -}; - -static const uint8_t kCat3[] = { 173, 148, 140, 0 }; -static const uint8_t kCat4[] = { 176, 155, 140, 135, 0 }; -static const uint8_t kCat5[] = { 180, 157, 141, 134, 130, 0 }; -static const uint8_t kCat6[] = - { 254, 254, 243, 230, 196, 177, 153, 140, 133, 130, 129, 0 }; -static const uint8_t* const kCat3456[] = { kCat3, kCat4, kCat5, kCat6 }; -static const uint8_t kZigzag[16] = { - 0, 1, 4, 8, 5, 2, 3, 6, 9, 12, 13, 10, 7, 11, 14, 15 -}; - -#define VP8GetBit vp8dx_decode_bool -#define NUM_PROBAS 11 -#define NUM_CTX 3 - -/* for const-casting */ -typedef const uint8_t (*ProbaArray)[NUM_CTX][NUM_PROBAS]; - -static int GetSigned(BOOL_DECODER *br, int value_to_sign) -{ - int split = (br->range + 1) >> 1; - VP8_BD_VALUE bigsplit = (VP8_BD_VALUE)split << (VP8_BD_VALUE_SIZE - 8); - int v; - - if(br->count < 0) - vp8dx_bool_decoder_fill(br); - - if ( br->value < bigsplit ) - { - br->range = split; - v= value_to_sign; - } - else - { - br->range = br->range-split; - br->value = br->value-bigsplit; - v = -value_to_sign; - } - br->range +=br->range; - br->value +=br->value; - br->count--; - - return v; -} -/* - Returns the position of the last non-zero coeff plus one - (and 0 if there's no coeff at all) -*/ -static int GetCoeffs(BOOL_DECODER *br, ProbaArray prob, - int ctx, int n, int16_t* out) -{ - const uint8_t* p = prob[n][ctx]; - if (!VP8GetBit(br, p[0])) - { /* first EOB is more a 'CBP' bit. */ - return 0; - } - while (1) - { - ++n; - if (!VP8GetBit(br, p[1])) - { - p = prob[kBands[n]][0]; - } - else - { /* non zero coeff */ - int v, j; - if (!VP8GetBit(br, p[2])) - { - p = prob[kBands[n]][1]; - v = 1; - } - else - { - if (!VP8GetBit(br, p[3])) - { - if (!VP8GetBit(br, p[4])) - { - v = 2; - } - else - { - v = 3 + VP8GetBit(br, p[5]); - } - } - else - { - if (!VP8GetBit(br, p[6])) - { - if (!VP8GetBit(br, p[7])) - { - v = 5 + VP8GetBit(br, 159); - } else - { - v = 7 + 2 * VP8GetBit(br, 165); - v += VP8GetBit(br, 145); - } - } - else - { - const uint8_t* tab; - const int bit1 = VP8GetBit(br, p[8]); - const int bit0 = VP8GetBit(br, p[9 + bit1]); - const int cat = 2 * bit1 + bit0; - v = 0; - for (tab = kCat3456[cat]; *tab; ++tab) - { - v += v + VP8GetBit(br, *tab); - } - v += 3 + (8 << cat); - } - } - p = prob[kBands[n]][2]; - } - j = kZigzag[n - 1]; - - out[j] = GetSigned(br, v); - - if (n == 16 || !VP8GetBit(br, p[0])) - { /* EOB */ - return n; - } - } - if (n == 16) - { - return 16; - } - } -} - -int vp8_decode_mb_tokens(VP8D_COMP *dx, MACROBLOCKD *x) -{ - BOOL_DECODER *bc = x->current_bc; - const FRAME_CONTEXT * const fc = &dx->common.fc; - char *eobs = x->eobs; - - int i; - int nonzeros; - int eobtotal = 0; - - short *qcoeff_ptr; - ProbaArray coef_probs; - ENTROPY_CONTEXT *a_ctx = ((ENTROPY_CONTEXT *)x->above_context); - ENTROPY_CONTEXT *l_ctx = ((ENTROPY_CONTEXT *)x->left_context); - ENTROPY_CONTEXT *a; - ENTROPY_CONTEXT *l; - int skip_dc = 0; - - qcoeff_ptr = &x->qcoeff[0]; - - if (!x->mode_info_context->mbmi.is_4x4) - { - a = a_ctx + 8; - l = l_ctx + 8; - - coef_probs = fc->coef_probs [1]; - - nonzeros = GetCoeffs(bc, coef_probs, (*a + *l), 0, qcoeff_ptr + 24 * 16); - *a = *l = (nonzeros > 0); - - eobs[24] = nonzeros; - eobtotal += nonzeros - 16; - - coef_probs = fc->coef_probs [0]; - skip_dc = 1; - } - else - { - coef_probs = fc->coef_probs [3]; - skip_dc = 0; - } - - for (i = 0; i < 16; ++i) - { - a = a_ctx + (i&3); - l = l_ctx + ((i&0xc)>>2); - - nonzeros = GetCoeffs(bc, coef_probs, (*a + *l), skip_dc, qcoeff_ptr); - *a = *l = (nonzeros > 0); - - nonzeros += skip_dc; - eobs[i] = nonzeros; - eobtotal += nonzeros; - qcoeff_ptr += 16; - } - - coef_probs = fc->coef_probs [2]; - - a_ctx += 4; - l_ctx += 4; - for (i = 16; i < 24; ++i) - { - a = a_ctx + ((i > 19)<<1) + (i&1); - l = l_ctx + ((i > 19)<<1) + ((i&3)>1); - - nonzeros = GetCoeffs(bc, coef_probs, (*a + *l), 0, qcoeff_ptr); - *a = *l = (nonzeros > 0); - - eobs[i] = nonzeros; - eobtotal += nonzeros; - qcoeff_ptr += 16; - } - - return eobtotal; -} - |