forked from KolibriOS/kolibrios
824 lines
29 KiB
C
824 lines
29 KiB
C
/*
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* Chinese AVS video (AVS1-P2, JiZhun profile) decoder.
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* Copyright (c) 2006 Stefan Gehrer <stefan.gehrer@gmx.de>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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/**
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* @file
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* Chinese AVS video (AVS1-P2, JiZhun profile) decoder
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* @author Stefan Gehrer <stefan.gehrer@gmx.de>
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*/
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#include "avcodec.h"
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#include "get_bits.h"
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#include "golomb.h"
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#include "h264chroma.h"
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#include "mathops.h"
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#include "cavs.h"
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static const uint8_t alpha_tab[64] = {
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0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2, 2, 3, 3,
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4, 4, 5, 5, 6, 7, 8, 9, 10, 11, 12, 13, 15, 16, 18, 20,
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22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,
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46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
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};
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static const uint8_t beta_tab[64] = {
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0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 1, 1, 2, 2, 2,
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2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, 5, 5, 5, 6, 6,
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6, 7, 7, 7, 8, 8, 8, 9, 9, 10, 10, 11, 11, 12, 13, 14,
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15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27
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};
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static const uint8_t tc_tab[64] = {
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0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,
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2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,
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5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9
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};
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/** mark block as unavailable, i.e. out of picture
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* or not yet decoded */
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static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL };
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static const int8_t left_modifier_l[8] = { 0, -1, 6, -1, -1, 7, 6, 7 };
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static const int8_t top_modifier_l[8] = { -1, 1, 5, -1, -1, 5, 7, 7 };
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static const int8_t left_modifier_c[7] = { 5, -1, 2, -1, 6, 5, 6 };
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static const int8_t top_modifier_c[7] = { 4, 1, -1, -1, 4, 6, 6 };
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/*****************************************************************************
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*
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* in-loop deblocking filter
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*
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****************************************************************************/
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static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b)
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{
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if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))
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return 2;
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if ((abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4))
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return 1;
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if (b) {
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mvP += MV_BWD_OFFS;
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mvQ += MV_BWD_OFFS;
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if ((abs(mvP->x - mvQ->x) >= 4) || (abs(mvP->y - mvQ->y) >= 4))
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return 1;
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} else {
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if (mvP->ref != mvQ->ref)
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return 1;
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}
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return 0;
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}
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#define SET_PARAMS \
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alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)]; \
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beta = beta_tab[av_clip(qp_avg + h->beta_offset, 0, 63)]; \
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tc = tc_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)];
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/**
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* in-loop deblocking filter for a single macroblock
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*
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* boundary strength (bs) mapping:
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*
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* --4---5--
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* 0 2 |
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* | 6 | 7 |
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* 1 3 |
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* ---------
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*
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*/
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void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type)
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{
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uint8_t bs[8];
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int qp_avg, alpha, beta, tc;
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int i;
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/* save un-deblocked lines */
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h->topleft_border_y = h->top_border_y[h->mbx * 16 + 15];
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h->topleft_border_u = h->top_border_u[h->mbx * 10 + 8];
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h->topleft_border_v = h->top_border_v[h->mbx * 10 + 8];
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memcpy(&h->top_border_y[h->mbx * 16], h->cy + 15 * h->l_stride, 16);
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memcpy(&h->top_border_u[h->mbx * 10 + 1], h->cu + 7 * h->c_stride, 8);
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memcpy(&h->top_border_v[h->mbx * 10 + 1], h->cv + 7 * h->c_stride, 8);
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for (i = 0; i < 8; i++) {
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h->left_border_y[i * 2 + 1] = *(h->cy + 15 + (i * 2 + 0) * h->l_stride);
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h->left_border_y[i * 2 + 2] = *(h->cy + 15 + (i * 2 + 1) * h->l_stride);
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h->left_border_u[i + 1] = *(h->cu + 7 + i * h->c_stride);
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h->left_border_v[i + 1] = *(h->cv + 7 + i * h->c_stride);
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}
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if (!h->loop_filter_disable) {
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/* determine bs */
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if (mb_type == I_8X8)
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memset(bs, 2, 8);
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else {
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memset(bs, 0, 8);
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if (ff_cavs_partition_flags[mb_type] & SPLITV) {
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bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);
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bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);
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}
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if (ff_cavs_partition_flags[mb_type] & SPLITH) {
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bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);
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bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);
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}
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bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);
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bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);
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bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);
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bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);
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}
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if (AV_RN64(bs)) {
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if (h->flags & A_AVAIL) {
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qp_avg = (h->qp + h->left_qp + 1) >> 1;
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SET_PARAMS;
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h->cdsp.cavs_filter_lv(h->cy, h->l_stride, alpha, beta, tc, bs[0], bs[1]);
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h->cdsp.cavs_filter_cv(h->cu, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
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h->cdsp.cavs_filter_cv(h->cv, h->c_stride, alpha, beta, tc, bs[0], bs[1]);
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}
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qp_avg = h->qp;
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SET_PARAMS;
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h->cdsp.cavs_filter_lv(h->cy + 8, h->l_stride, alpha, beta, tc, bs[2], bs[3]);
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h->cdsp.cavs_filter_lh(h->cy + 8 * h->l_stride, h->l_stride, alpha, beta, tc, bs[6], bs[7]);
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if (h->flags & B_AVAIL) {
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qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;
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SET_PARAMS;
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h->cdsp.cavs_filter_lh(h->cy, h->l_stride, alpha, beta, tc, bs[4], bs[5]);
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h->cdsp.cavs_filter_ch(h->cu, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
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h->cdsp.cavs_filter_ch(h->cv, h->c_stride, alpha, beta, tc, bs[4], bs[5]);
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}
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}
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}
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h->left_qp = h->qp;
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h->top_qp[h->mbx] = h->qp;
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}
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#undef SET_PARAMS
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/*****************************************************************************
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*
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* spatial intra prediction
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*
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****************************************************************************/
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void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,
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uint8_t **left, int block)
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{
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int i;
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switch (block) {
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case 0:
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*left = h->left_border_y;
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h->left_border_y[0] = h->left_border_y[1];
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memset(&h->left_border_y[17], h->left_border_y[16], 9);
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memcpy(&top[1], &h->top_border_y[h->mbx * 16], 16);
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top[17] = top[16];
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top[0] = top[1];
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if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))
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h->left_border_y[0] = top[0] = h->topleft_border_y;
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break;
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case 1:
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*left = h->intern_border_y;
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for (i = 0; i < 8; i++)
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h->intern_border_y[i + 1] = *(h->cy + 7 + i * h->l_stride);
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memset(&h->intern_border_y[9], h->intern_border_y[8], 9);
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h->intern_border_y[0] = h->intern_border_y[1];
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memcpy(&top[1], &h->top_border_y[h->mbx * 16 + 8], 8);
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if (h->flags & C_AVAIL)
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memcpy(&top[9], &h->top_border_y[(h->mbx + 1) * 16], 8);
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else
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memset(&top[9], top[8], 9);
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top[17] = top[16];
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top[0] = top[1];
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if (h->flags & B_AVAIL)
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h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];
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break;
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case 2:
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*left = &h->left_border_y[8];
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memcpy(&top[1], h->cy + 7 * h->l_stride, 16);
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top[17] = top[16];
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top[0] = top[1];
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if (h->flags & A_AVAIL)
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top[0] = h->left_border_y[8];
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break;
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case 3:
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*left = &h->intern_border_y[8];
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for (i = 0; i < 8; i++)
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h->intern_border_y[i + 9] = *(h->cy + 7 + (i + 8) * h->l_stride);
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memset(&h->intern_border_y[17], h->intern_border_y[16], 9);
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memcpy(&top[0], h->cy + 7 + 7 * h->l_stride, 9);
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memset(&top[9], top[8], 9);
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break;
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}
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}
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void ff_cavs_load_intra_pred_chroma(AVSContext *h)
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{
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/* extend borders by one pixel */
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h->left_border_u[9] = h->left_border_u[8];
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h->left_border_v[9] = h->left_border_v[8];
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h->top_border_u[h->mbx * 10 + 9] = h->top_border_u[h->mbx * 10 + 8];
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h->top_border_v[h->mbx * 10 + 9] = h->top_border_v[h->mbx * 10 + 8];
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if (h->mbx && h->mby) {
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h->top_border_u[h->mbx * 10] = h->left_border_u[0] = h->topleft_border_u;
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h->top_border_v[h->mbx * 10] = h->left_border_v[0] = h->topleft_border_v;
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} else {
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h->left_border_u[0] = h->left_border_u[1];
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h->left_border_v[0] = h->left_border_v[1];
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h->top_border_u[h->mbx * 10] = h->top_border_u[h->mbx * 10 + 1];
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h->top_border_v[h->mbx * 10] = h->top_border_v[h->mbx * 10 + 1];
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}
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}
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static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int y;
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uint64_t a = AV_RN64(&top[1]);
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for (y = 0; y < 8; y++)
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*((uint64_t *)(d + y * stride)) = a;
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}
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static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int y;
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uint64_t a;
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for (y = 0; y < 8; y++) {
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a = left[y + 1] * 0x0101010101010101ULL;
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*((uint64_t *)(d + y * stride)) = a;
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}
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}
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static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int y;
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uint64_t a = 0x8080808080808080ULL;
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for (y = 0; y < 8; y++)
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*((uint64_t *)(d + y * stride)) = a;
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}
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static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int x, y, ia;
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int ih = 0;
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int iv = 0;
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const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP;
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for (x = 0; x < 4; x++) {
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ih += (x + 1) * (top[5 + x] - top[3 - x]);
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iv += (x + 1) * (left[5 + x] - left[3 - x]);
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}
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ia = (top[8] + left[8]) << 4;
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ih = (17 * ih + 16) >> 5;
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iv = (17 * iv + 16) >> 5;
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for (y = 0; y < 8; y++)
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for (x = 0; x < 8; x++)
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d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];
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}
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#define LOWPASS(ARRAY, INDEX) \
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((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2)
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static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int x, y;
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for (y = 0; y < 8; y++)
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for (x = 0; x < 8; x++)
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d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;
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}
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static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int x, y;
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for (y = 0; y < 8; y++)
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for (x = 0; x < 8; x++)
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d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;
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}
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static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int x, y;
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for (y = 0; y < 8; y++)
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for (x = 0; x < 8; x++)
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if (x == y)
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d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;
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else if (x > y)
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d[y * stride + x] = LOWPASS(top, x - y);
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else
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d[y * stride + x] = LOWPASS(left, y - x);
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}
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static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int x, y;
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for (y = 0; y < 8; y++)
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for (x = 0; x < 8; x++)
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d[y * stride + x] = LOWPASS(left, y + 1);
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}
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static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, int stride)
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{
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int x, y;
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for (y = 0; y < 8; y++)
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for (x = 0; x < 8; x++)
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d[y * stride + x] = LOWPASS(top, x + 1);
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}
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#undef LOWPASS
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static inline void modify_pred(const int8_t *mod_table, int *mode)
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{
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*mode = mod_table[*mode];
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if (*mode < 0) {
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av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");
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*mode = 0;
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}
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}
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void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv)
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{
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/* save pred modes before they get modified */
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h->pred_mode_Y[3] = h->pred_mode_Y[5];
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h->pred_mode_Y[6] = h->pred_mode_Y[8];
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h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];
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h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];
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/* modify pred modes according to availability of neighbour samples */
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if (!(h->flags & A_AVAIL)) {
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modify_pred(left_modifier_l, &h->pred_mode_Y[4]);
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modify_pred(left_modifier_l, &h->pred_mode_Y[7]);
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modify_pred(left_modifier_c, pred_mode_uv);
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}
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if (!(h->flags & B_AVAIL)) {
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modify_pred(top_modifier_l, &h->pred_mode_Y[4]);
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modify_pred(top_modifier_l, &h->pred_mode_Y[5]);
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modify_pred(top_modifier_c, pred_mode_uv);
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}
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}
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/*****************************************************************************
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*
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* motion compensation
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*
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****************************************************************************/
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static inline void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height,
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int delta, int list, uint8_t *dest_y,
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uint8_t *dest_cb, uint8_t *dest_cr,
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int src_x_offset, int src_y_offset,
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qpel_mc_func *qpix_op,
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h264_chroma_mc_func chroma_op, cavs_vector *mv)
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{
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const int mx = mv->x + src_x_offset * 8;
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const int my = mv->y + src_y_offset * 8;
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const int luma_xy = (mx & 3) + ((my & 3) << 2);
|
|
uint8_t *src_y = pic->data[0] + (mx >> 2) + (my >> 2) * h->l_stride;
|
|
uint8_t *src_cb = pic->data[1] + (mx >> 3) + (my >> 3) * h->c_stride;
|
|
uint8_t *src_cr = pic->data[2] + (mx >> 3) + (my >> 3) * h->c_stride;
|
|
int extra_width = 0;
|
|
int extra_height = extra_width;
|
|
const int full_mx = mx >> 2;
|
|
const int full_my = my >> 2;
|
|
const int pic_width = 16 * h->mb_width;
|
|
const int pic_height = 16 * h->mb_height;
|
|
int emu = 0;
|
|
|
|
if (!pic->data[0])
|
|
return;
|
|
if (mx & 7)
|
|
extra_width -= 3;
|
|
if (my & 7)
|
|
extra_height -= 3;
|
|
|
|
if (full_mx < 0 - extra_width ||
|
|
full_my < 0 - extra_height ||
|
|
full_mx + 16 /* FIXME */ > pic_width + extra_width ||
|
|
full_my + 16 /* FIXME */ > pic_height + extra_height) {
|
|
h->vdsp.emulated_edge_mc(h->edge_emu_buffer, h->l_stride,
|
|
src_y - 2 - 2 * h->l_stride, h->l_stride,
|
|
16 + 5, 16 + 5 /* FIXME */,
|
|
full_mx - 2, full_my - 2,
|
|
pic_width, pic_height);
|
|
src_y = h->edge_emu_buffer + 2 + 2 * h->l_stride;
|
|
emu = 1;
|
|
}
|
|
|
|
// FIXME try variable height perhaps?
|
|
qpix_op[luma_xy](dest_y, src_y, h->l_stride);
|
|
|
|
if (emu) {
|
|
h->vdsp.emulated_edge_mc(h->edge_emu_buffer, h->c_stride, src_cb,
|
|
h->c_stride,
|
|
9, 9 /* FIXME */,
|
|
mx >> 3, my >> 3,
|
|
pic_width >> 1, pic_height >> 1);
|
|
src_cb = h->edge_emu_buffer;
|
|
}
|
|
chroma_op(dest_cb, src_cb, h->c_stride, chroma_height, mx & 7, my & 7);
|
|
|
|
if (emu) {
|
|
h->vdsp.emulated_edge_mc(h->edge_emu_buffer, h->c_stride, src_cr,
|
|
h->c_stride,
|
|
9, 9 /* FIXME */,
|
|
mx >> 3, my >> 3,
|
|
pic_width >> 1, pic_height >> 1);
|
|
src_cr = h->edge_emu_buffer;
|
|
}
|
|
chroma_op(dest_cr, src_cr, h->c_stride, chroma_height, mx & 7, my & 7);
|
|
}
|
|
|
|
static inline void mc_part_std(AVSContext *h, int chroma_height, int delta,
|
|
uint8_t *dest_y,
|
|
uint8_t *dest_cb,
|
|
uint8_t *dest_cr,
|
|
int x_offset, int y_offset,
|
|
qpel_mc_func *qpix_put,
|
|
h264_chroma_mc_func chroma_put,
|
|
qpel_mc_func *qpix_avg,
|
|
h264_chroma_mc_func chroma_avg,
|
|
cavs_vector *mv)
|
|
{
|
|
qpel_mc_func *qpix_op = qpix_put;
|
|
h264_chroma_mc_func chroma_op = chroma_put;
|
|
|
|
dest_y += x_offset * 2 + y_offset * h->l_stride * 2;
|
|
dest_cb += x_offset + y_offset * h->c_stride;
|
|
dest_cr += x_offset + y_offset * h->c_stride;
|
|
x_offset += 8 * h->mbx;
|
|
y_offset += 8 * h->mby;
|
|
|
|
if (mv->ref >= 0) {
|
|
AVFrame *ref = h->DPB[mv->ref].f;
|
|
mc_dir_part(h, ref, chroma_height, delta, 0,
|
|
dest_y, dest_cb, dest_cr, x_offset, y_offset,
|
|
qpix_op, chroma_op, mv);
|
|
|
|
qpix_op = qpix_avg;
|
|
chroma_op = chroma_avg;
|
|
}
|
|
|
|
if ((mv + MV_BWD_OFFS)->ref >= 0) {
|
|
AVFrame *ref = h->DPB[0].f;
|
|
mc_dir_part(h, ref, chroma_height, delta, 1,
|
|
dest_y, dest_cb, dest_cr, x_offset, y_offset,
|
|
qpix_op, chroma_op, mv + MV_BWD_OFFS);
|
|
}
|
|
}
|
|
|
|
void ff_cavs_inter(AVSContext *h, enum cavs_mb mb_type)
|
|
{
|
|
if (ff_cavs_partition_flags[mb_type] == 0) { // 16x16
|
|
mc_part_std(h, 8, 0, h->cy, h->cu, h->cv, 0, 0,
|
|
h->cdsp.put_cavs_qpel_pixels_tab[0],
|
|
h->h264chroma.put_h264_chroma_pixels_tab[0],
|
|
h->cdsp.avg_cavs_qpel_pixels_tab[0],
|
|
h->h264chroma.avg_h264_chroma_pixels_tab[0],
|
|
&h->mv[MV_FWD_X0]);
|
|
} else {
|
|
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 0,
|
|
h->cdsp.put_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.put_h264_chroma_pixels_tab[1],
|
|
h->cdsp.avg_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.avg_h264_chroma_pixels_tab[1],
|
|
&h->mv[MV_FWD_X0]);
|
|
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 0,
|
|
h->cdsp.put_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.put_h264_chroma_pixels_tab[1],
|
|
h->cdsp.avg_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.avg_h264_chroma_pixels_tab[1],
|
|
&h->mv[MV_FWD_X1]);
|
|
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 0, 4,
|
|
h->cdsp.put_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.put_h264_chroma_pixels_tab[1],
|
|
h->cdsp.avg_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.avg_h264_chroma_pixels_tab[1],
|
|
&h->mv[MV_FWD_X2]);
|
|
mc_part_std(h, 4, 0, h->cy, h->cu, h->cv, 4, 4,
|
|
h->cdsp.put_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.put_h264_chroma_pixels_tab[1],
|
|
h->cdsp.avg_cavs_qpel_pixels_tab[1],
|
|
h->h264chroma.avg_h264_chroma_pixels_tab[1],
|
|
&h->mv[MV_FWD_X3]);
|
|
}
|
|
}
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* motion vector prediction
|
|
*
|
|
****************************************************************************/
|
|
|
|
static inline void scale_mv(AVSContext *h, int *d_x, int *d_y,
|
|
cavs_vector *src, int distp)
|
|
{
|
|
int den = h->scale_den[src->ref];
|
|
|
|
*d_x = (src->x * distp * den + 256 + (src->x >> 31)) >> 9;
|
|
*d_y = (src->y * distp * den + 256 + (src->y >> 31)) >> 9;
|
|
}
|
|
|
|
static inline void mv_pred_median(AVSContext *h,
|
|
cavs_vector *mvP,
|
|
cavs_vector *mvA,
|
|
cavs_vector *mvB,
|
|
cavs_vector *mvC)
|
|
{
|
|
int ax, ay, bx, by, cx, cy;
|
|
int len_ab, len_bc, len_ca, len_mid;
|
|
|
|
/* scale candidates according to their temporal span */
|
|
scale_mv(h, &ax, &ay, mvA, mvP->dist);
|
|
scale_mv(h, &bx, &by, mvB, mvP->dist);
|
|
scale_mv(h, &cx, &cy, mvC, mvP->dist);
|
|
/* find the geometrical median of the three candidates */
|
|
len_ab = abs(ax - bx) + abs(ay - by);
|
|
len_bc = abs(bx - cx) + abs(by - cy);
|
|
len_ca = abs(cx - ax) + abs(cy - ay);
|
|
len_mid = mid_pred(len_ab, len_bc, len_ca);
|
|
if (len_mid == len_ab) {
|
|
mvP->x = cx;
|
|
mvP->y = cy;
|
|
} else if (len_mid == len_bc) {
|
|
mvP->x = ax;
|
|
mvP->y = ay;
|
|
} else {
|
|
mvP->x = bx;
|
|
mvP->y = by;
|
|
}
|
|
}
|
|
|
|
void ff_cavs_mv(AVSContext *h, enum cavs_mv_loc nP, enum cavs_mv_loc nC,
|
|
enum cavs_mv_pred mode, enum cavs_block size, int ref)
|
|
{
|
|
cavs_vector *mvP = &h->mv[nP];
|
|
cavs_vector *mvA = &h->mv[nP-1];
|
|
cavs_vector *mvB = &h->mv[nP-4];
|
|
cavs_vector *mvC = &h->mv[nC];
|
|
const cavs_vector *mvP2 = NULL;
|
|
|
|
mvP->ref = ref;
|
|
mvP->dist = h->dist[mvP->ref];
|
|
if (mvC->ref == NOT_AVAIL)
|
|
mvC = &h->mv[nP - 5]; // set to top-left (mvD)
|
|
if (mode == MV_PRED_PSKIP &&
|
|
(mvA->ref == NOT_AVAIL ||
|
|
mvB->ref == NOT_AVAIL ||
|
|
(mvA->x | mvA->y | mvA->ref) == 0 ||
|
|
(mvB->x | mvB->y | mvB->ref) == 0)) {
|
|
mvP2 = &un_mv;
|
|
/* if there is only one suitable candidate, take it */
|
|
} else if (mvA->ref >= 0 && mvB->ref < 0 && mvC->ref < 0) {
|
|
mvP2 = mvA;
|
|
} else if (mvA->ref < 0 && mvB->ref >= 0 && mvC->ref < 0) {
|
|
mvP2 = mvB;
|
|
} else if (mvA->ref < 0 && mvB->ref < 0 && mvC->ref >= 0) {
|
|
mvP2 = mvC;
|
|
} else if (mode == MV_PRED_LEFT && mvA->ref == ref) {
|
|
mvP2 = mvA;
|
|
} else if (mode == MV_PRED_TOP && mvB->ref == ref) {
|
|
mvP2 = mvB;
|
|
} else if (mode == MV_PRED_TOPRIGHT && mvC->ref == ref) {
|
|
mvP2 = mvC;
|
|
}
|
|
if (mvP2) {
|
|
mvP->x = mvP2->x;
|
|
mvP->y = mvP2->y;
|
|
} else
|
|
mv_pred_median(h, mvP, mvA, mvB, mvC);
|
|
|
|
if (mode < MV_PRED_PSKIP) {
|
|
mvP->x += get_se_golomb(&h->gb);
|
|
mvP->y += get_se_golomb(&h->gb);
|
|
}
|
|
set_mvs(mvP, size);
|
|
}
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* macroblock level
|
|
*
|
|
****************************************************************************/
|
|
|
|
/**
|
|
* initialise predictors for motion vectors and intra prediction
|
|
*/
|
|
void ff_cavs_init_mb(AVSContext *h)
|
|
{
|
|
int i;
|
|
|
|
/* copy predictors from top line (MB B and C) into cache */
|
|
for (i = 0; i < 3; i++) {
|
|
h->mv[MV_FWD_B2 + i] = h->top_mv[0][h->mbx * 2 + i];
|
|
h->mv[MV_BWD_B2 + i] = h->top_mv[1][h->mbx * 2 + i];
|
|
}
|
|
h->pred_mode_Y[1] = h->top_pred_Y[h->mbx * 2 + 0];
|
|
h->pred_mode_Y[2] = h->top_pred_Y[h->mbx * 2 + 1];
|
|
/* clear top predictors if MB B is not available */
|
|
if (!(h->flags & B_AVAIL)) {
|
|
h->mv[MV_FWD_B2] = un_mv;
|
|
h->mv[MV_FWD_B3] = un_mv;
|
|
h->mv[MV_BWD_B2] = un_mv;
|
|
h->mv[MV_BWD_B3] = un_mv;
|
|
h->pred_mode_Y[1] = h->pred_mode_Y[2] = NOT_AVAIL;
|
|
h->flags &= ~(C_AVAIL | D_AVAIL);
|
|
} else if (h->mbx) {
|
|
h->flags |= D_AVAIL;
|
|
}
|
|
if (h->mbx == h->mb_width - 1) // MB C not available
|
|
h->flags &= ~C_AVAIL;
|
|
/* clear top-right predictors if MB C is not available */
|
|
if (!(h->flags & C_AVAIL)) {
|
|
h->mv[MV_FWD_C2] = un_mv;
|
|
h->mv[MV_BWD_C2] = un_mv;
|
|
}
|
|
/* clear top-left predictors if MB D is not available */
|
|
if (!(h->flags & D_AVAIL)) {
|
|
h->mv[MV_FWD_D3] = un_mv;
|
|
h->mv[MV_BWD_D3] = un_mv;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* save predictors for later macroblocks and increase
|
|
* macroblock address
|
|
* @return 0 if end of frame is reached, 1 otherwise
|
|
*/
|
|
int ff_cavs_next_mb(AVSContext *h)
|
|
{
|
|
int i;
|
|
|
|
h->flags |= A_AVAIL;
|
|
h->cy += 16;
|
|
h->cu += 8;
|
|
h->cv += 8;
|
|
/* copy mvs as predictors to the left */
|
|
for (i = 0; i <= 20; i += 4)
|
|
h->mv[i] = h->mv[i + 2];
|
|
/* copy bottom mvs from cache to top line */
|
|
h->top_mv[0][h->mbx * 2 + 0] = h->mv[MV_FWD_X2];
|
|
h->top_mv[0][h->mbx * 2 + 1] = h->mv[MV_FWD_X3];
|
|
h->top_mv[1][h->mbx * 2 + 0] = h->mv[MV_BWD_X2];
|
|
h->top_mv[1][h->mbx * 2 + 1] = h->mv[MV_BWD_X3];
|
|
/* next MB address */
|
|
h->mbidx++;
|
|
h->mbx++;
|
|
if (h->mbx == h->mb_width) { // New mb line
|
|
h->flags = B_AVAIL | C_AVAIL;
|
|
/* clear left pred_modes */
|
|
h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
|
|
/* clear left mv predictors */
|
|
for (i = 0; i <= 20; i += 4)
|
|
h->mv[i] = un_mv;
|
|
h->mbx = 0;
|
|
h->mby++;
|
|
/* re-calculate sample pointers */
|
|
h->cy = h->cur.f->data[0] + h->mby * 16 * h->l_stride;
|
|
h->cu = h->cur.f->data[1] + h->mby * 8 * h->c_stride;
|
|
h->cv = h->cur.f->data[2] + h->mby * 8 * h->c_stride;
|
|
if (h->mby == h->mb_height) { // Frame end
|
|
return 0;
|
|
}
|
|
}
|
|
return 1;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* frame level
|
|
*
|
|
****************************************************************************/
|
|
|
|
int ff_cavs_init_pic(AVSContext *h)
|
|
{
|
|
int i;
|
|
|
|
/* clear some predictors */
|
|
for (i = 0; i <= 20; i += 4)
|
|
h->mv[i] = un_mv;
|
|
h->mv[MV_BWD_X0] = ff_cavs_dir_mv;
|
|
set_mvs(&h->mv[MV_BWD_X0], BLK_16X16);
|
|
h->mv[MV_FWD_X0] = ff_cavs_dir_mv;
|
|
set_mvs(&h->mv[MV_FWD_X0], BLK_16X16);
|
|
h->pred_mode_Y[3] = h->pred_mode_Y[6] = NOT_AVAIL;
|
|
h->cy = h->cur.f->data[0];
|
|
h->cu = h->cur.f->data[1];
|
|
h->cv = h->cur.f->data[2];
|
|
h->l_stride = h->cur.f->linesize[0];
|
|
h->c_stride = h->cur.f->linesize[1];
|
|
h->luma_scan[2] = 8 * h->l_stride;
|
|
h->luma_scan[3] = 8 * h->l_stride + 8;
|
|
h->mbx = h->mby = h->mbidx = 0;
|
|
h->flags = 0;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*****************************************************************************
|
|
*
|
|
* headers and interface
|
|
*
|
|
****************************************************************************/
|
|
|
|
/**
|
|
* some predictions require data from the top-neighbouring macroblock.
|
|
* this data has to be stored for one complete row of macroblocks
|
|
* and this storage space is allocated here
|
|
*/
|
|
void ff_cavs_init_top_lines(AVSContext *h)
|
|
{
|
|
/* alloc top line of predictors */
|
|
h->top_qp = av_mallocz(h->mb_width);
|
|
h->top_mv[0] = av_mallocz((h->mb_width * 2 + 1) * sizeof(cavs_vector));
|
|
h->top_mv[1] = av_mallocz((h->mb_width * 2 + 1) * sizeof(cavs_vector));
|
|
h->top_pred_Y = av_mallocz(h->mb_width * 2 * sizeof(*h->top_pred_Y));
|
|
h->top_border_y = av_mallocz((h->mb_width + 1) * 16);
|
|
h->top_border_u = av_mallocz(h->mb_width * 10);
|
|
h->top_border_v = av_mallocz(h->mb_width * 10);
|
|
|
|
/* alloc space for co-located MVs and types */
|
|
h->col_mv = av_mallocz(h->mb_width * h->mb_height * 4 *
|
|
sizeof(cavs_vector));
|
|
h->col_type_base = av_mallocz(h->mb_width * h->mb_height);
|
|
h->block = av_mallocz(64 * sizeof(int16_t));
|
|
}
|
|
|
|
av_cold int ff_cavs_init(AVCodecContext *avctx)
|
|
{
|
|
AVSContext *h = avctx->priv_data;
|
|
|
|
ff_dsputil_init(&h->dsp, avctx);
|
|
ff_h264chroma_init(&h->h264chroma, 8);
|
|
ff_videodsp_init(&h->vdsp, 8);
|
|
ff_cavsdsp_init(&h->cdsp, avctx);
|
|
ff_init_scantable_permutation(h->dsp.idct_permutation,
|
|
h->cdsp.idct_perm);
|
|
ff_init_scantable(h->dsp.idct_permutation, &h->scantable, ff_zigzag_direct);
|
|
|
|
h->avctx = avctx;
|
|
avctx->pix_fmt = AV_PIX_FMT_YUV420P;
|
|
|
|
h->cur.f = av_frame_alloc();
|
|
h->DPB[0].f = av_frame_alloc();
|
|
h->DPB[1].f = av_frame_alloc();
|
|
if (!h->cur.f || !h->DPB[0].f || !h->DPB[1].f) {
|
|
ff_cavs_end(avctx);
|
|
return AVERROR(ENOMEM);
|
|
}
|
|
|
|
h->luma_scan[0] = 0;
|
|
h->luma_scan[1] = 8;
|
|
h->intra_pred_l[INTRA_L_VERT] = intra_pred_vert;
|
|
h->intra_pred_l[INTRA_L_HORIZ] = intra_pred_horiz;
|
|
h->intra_pred_l[INTRA_L_LP] = intra_pred_lp;
|
|
h->intra_pred_l[INTRA_L_DOWN_LEFT] = intra_pred_down_left;
|
|
h->intra_pred_l[INTRA_L_DOWN_RIGHT] = intra_pred_down_right;
|
|
h->intra_pred_l[INTRA_L_LP_LEFT] = intra_pred_lp_left;
|
|
h->intra_pred_l[INTRA_L_LP_TOP] = intra_pred_lp_top;
|
|
h->intra_pred_l[INTRA_L_DC_128] = intra_pred_dc_128;
|
|
h->intra_pred_c[INTRA_C_LP] = intra_pred_lp;
|
|
h->intra_pred_c[INTRA_C_HORIZ] = intra_pred_horiz;
|
|
h->intra_pred_c[INTRA_C_VERT] = intra_pred_vert;
|
|
h->intra_pred_c[INTRA_C_PLANE] = intra_pred_plane;
|
|
h->intra_pred_c[INTRA_C_LP_LEFT] = intra_pred_lp_left;
|
|
h->intra_pred_c[INTRA_C_LP_TOP] = intra_pred_lp_top;
|
|
h->intra_pred_c[INTRA_C_DC_128] = intra_pred_dc_128;
|
|
h->mv[7] = un_mv;
|
|
h->mv[19] = un_mv;
|
|
return 0;
|
|
}
|
|
|
|
av_cold int ff_cavs_end(AVCodecContext *avctx)
|
|
{
|
|
AVSContext *h = avctx->priv_data;
|
|
|
|
av_frame_free(&h->cur.f);
|
|
av_frame_free(&h->DPB[0].f);
|
|
av_frame_free(&h->DPB[1].f);
|
|
|
|
av_free(h->top_qp);
|
|
av_free(h->top_mv[0]);
|
|
av_free(h->top_mv[1]);
|
|
av_free(h->top_pred_Y);
|
|
av_free(h->top_border_y);
|
|
av_free(h->top_border_u);
|
|
av_free(h->top_border_v);
|
|
av_free(h->col_mv);
|
|
av_free(h->col_type_base);
|
|
av_free(h->block);
|
|
av_freep(&h->edge_emu_buffer);
|
|
return 0;
|
|
}
|