mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
7daba17fb2
This updates our in-tree copy of libvpx to the v1.3.0 git tag (2e88f2f2ec777259bda1714e72f1ecd2519bceb5) libvpx 1.3.0 adds support for VP9. VP9 support is built but not yet exposed with this commit. Our update.sh script is replaced with update.py that can update the build system to a given git commit. - checkout out upstream git - create platform dependend config files - add/remove changed libvpx files - update moz.build - warn about new build categories in libvpx
116 lines
2.6 KiB
C
116 lines
2.6 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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/****************************************************************************
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*
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* Module Title : vp9_boolhuff.h
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*
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* Description : Bool Coder header file.
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*
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****************************************************************************/
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#ifndef VP9_ENCODER_VP9_BOOLHUFF_H_
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#define VP9_ENCODER_VP9_BOOLHUFF_H_
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#include "vpx_ports/mem.h"
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typedef struct {
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unsigned int lowvalue;
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unsigned int range;
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unsigned int value;
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int count;
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unsigned int pos;
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uint8_t *buffer;
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// Variables used to track bit costs without outputing to the bitstream
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unsigned int measure_cost;
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unsigned long bit_counter;
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} vp9_writer;
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extern const unsigned int vp9_prob_cost[256];
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void vp9_start_encode(vp9_writer *bc, uint8_t *buffer);
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void vp9_stop_encode(vp9_writer *bc);
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DECLARE_ALIGNED(16, extern const unsigned char, vp9_norm[256]);
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static void vp9_write(vp9_writer *br, int bit, int probability) {
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unsigned int split;
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int count = br->count;
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unsigned int range = br->range;
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unsigned int lowvalue = br->lowvalue;
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register unsigned int shift;
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#ifdef ENTROPY_STATS
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#if defined(SECTIONBITS_OUTPUT)
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if (bit)
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Sectionbits[active_section] += vp9_prob_cost[255 - probability];
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else
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Sectionbits[active_section] += vp9_prob_cost[probability];
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#endif
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#endif
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split = 1 + (((range - 1) * probability) >> 8);
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range = split;
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if (bit) {
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lowvalue += split;
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range = br->range - split;
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}
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shift = vp9_norm[range];
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range <<= shift;
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count += shift;
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if (count >= 0) {
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int offset = shift - count;
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if ((lowvalue << (offset - 1)) & 0x80000000) {
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int x = br->pos - 1;
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while (x >= 0 && br->buffer[x] == 0xff) {
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br->buffer[x] = 0;
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x--;
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}
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br->buffer[x] += 1;
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}
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br->buffer[br->pos++] = (lowvalue >> (24 - offset));
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lowvalue <<= offset;
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shift = count;
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lowvalue &= 0xffffff;
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count -= 8;
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}
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lowvalue <<= shift;
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br->count = count;
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br->lowvalue = lowvalue;
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br->range = range;
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}
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static void vp9_write_bit(vp9_writer *w, int bit) {
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vp9_write(w, bit, 128); // vp9_prob_half
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}
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static void vp9_write_literal(vp9_writer *w, int data, int bits) {
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int bit;
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for (bit = bits - 1; bit >= 0; bit--)
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vp9_write_bit(w, 1 & (data >> bit));
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}
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#endif // VP9_ENCODER_VP9_BOOLHUFF_H_
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