/*
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* Copyright 2017 Rockchip Electronics Co. LTD
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define MODULE_TAG "hal_vp8e_putbit"
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#include "hal_vp8e_base.h"
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#include "hal_vp8e_putbit.h"
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#define TRACE_BIT_STREAM(v,n)
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MPP_RET vp8e_set_buffer(Vp8ePutBitBuf *bitbuf, RK_U8 *data, RK_S32 size)
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{
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if ((bitbuf == NULL) || (data == NULL) || (size < 1))
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return MPP_NOK;
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bitbuf->data = data;
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bitbuf->p_data = data;
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bitbuf->size = size;
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bitbuf->range = 255;
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bitbuf->bottom = 0;
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bitbuf->bits_left = 24;
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bitbuf->byte_cnt = 0;
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return MPP_OK;
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}
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MPP_RET vp8e_put_bool(Vp8ePutBitBuf *bitbuf, RK_S32 prob, RK_S32 bool_value)
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{
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RK_S32 bits = 0;
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RK_S32 length_bits = 0;
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RK_S32 split = 1 + ((bitbuf->range - 1) * prob >> 8);
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if (bool_value) {
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bitbuf->bottom += split;
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bitbuf->range -= split;
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} else {
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bitbuf->range = split;
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}
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while (bitbuf->range < 128) {
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if (bitbuf->bottom < 0) {
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RK_U8 *data = bitbuf->data;
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while (*--data == 255) {
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*data = 0;
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}
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(*data)++;
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}
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bitbuf->range <<= 1;
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bitbuf->bottom <<= 1;
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if (!--bitbuf->bits_left) {
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length_bits += 8;
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bits <<= 8;
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bits |= (bitbuf->bottom >> 24) & 0xff;
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TRACE_BIT_STREAM(bits & 0xff, 8);
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*bitbuf->data++ = (bitbuf->bottom >> 24) & 0xff;
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bitbuf->byte_cnt++;
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bitbuf->bottom &= 0xffffff; /* Keep 3 bytes */
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bitbuf->bits_left = 8;
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}
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}
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return MPP_OK;
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}
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MPP_RET vp8e_put_lit(Vp8ePutBitBuf *bitbuf, RK_S32 value,
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RK_S32 number)
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{
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while (number--) {
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vp8e_put_bool(bitbuf, 128, (value >> number) & 0x1);
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}
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return MPP_OK;
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}
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MPP_RET vp8e_put_byte(Vp8ePutBitBuf *bitbuf, RK_S32 byte)
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{
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*bitbuf->data++ = byte;
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bitbuf->byte_cnt++;
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return MPP_OK;
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}
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MPP_RET vp8e_buffer_gap(Vp8ePutBitBuf *bitbuf, RK_S32 gap)
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{
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if ((bitbuf->data - bitbuf->p_data) + gap > bitbuf->size) {
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bitbuf->size = 0;
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return MPP_NOK;
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}
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return MPP_OK;
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}
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MPP_RET vp8e_buffer_overflow(Vp8ePutBitBuf *bitbuf)
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{
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if (bitbuf->size > 0)
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return MPP_OK;
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return MPP_NOK;
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}
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