/* * Chinese AVS video (AVS1-P2, JiZhun profile) decoder. * Copyright (c) 2006  Stefan Gehrer <stefan.gehrer@gmx.de> * * This file is part of FFmpeg. * * FFmpeg is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * FFmpeg is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ /** * @file * Chinese AVS video (AVS1-P2, JiZhun profile) decoder * @author Stefan Gehrer <stefan.gehrer@gmx.de> */ #include "libavutil/mem.h"#include "avcodec.h"#include "golomb.h"#include "h264chroma.h"#include "idctdsp.h"#include "mathops.h"#include "qpeldsp.h"#include "cavs.h" static const uint8_t alpha_tab[64] = {     0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  2,  2,  2,  3,  3,     4,  4,  5,  5,  6,  7,  8,  9, 10, 11, 12, 13, 15, 16, 18, 20,    22, 24, 26, 28, 30, 33, 33, 35, 35, 36, 37, 37, 39, 39, 42, 44,    46, 48, 50, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64}; static const uint8_t beta_tab[64] = {     0,  0,  0,  0,  0,  0,  1,  1,  1,  1,  1,  1,  1,  2,  2,  2,     2,  2,  3,  3,  3,  3,  4,  4,  4,  4,  5,  5,  5,  5,  6,  6,     6,  7,  7,  7,  8,  8,  8,  9,  9, 10, 10, 11, 11, 12, 13, 14,    15, 16, 17, 18, 19, 20, 21, 22, 23, 23, 24, 24, 25, 25, 26, 27}; static const uint8_t tc_tab[64] = {    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,    1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 2,    2, 2, 2, 2, 2, 2, 3, 3, 3, 3, 3, 3, 3, 4, 4, 4,    5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9}; /** mark block as unavailable, i.e. out of picture *  or not yet decoded */static const cavs_vector un_mv = { 0, 0, 1, NOT_AVAIL }; static const int8_t left_modifier_l[8] = {  0, -1,  6, -1, -1, 7, 6, 7 };static const int8_t top_modifier_l[8]  = { -1,  1,  5, -1, -1, 5, 7, 7 };static const int8_t left_modifier_c[7] = {  5, -1,  2, -1,  6, 5, 6 };static const int8_t top_modifier_c[7]  = {  4,  1, -1, -1,  4, 6, 6 }; /***************************************************************************** * * in-loop deblocking filter * ****************************************************************************/ static inline int get_bs(cavs_vector *mvP, cavs_vector *mvQ, int b){    if ((mvP->ref == REF_INTRA) || (mvQ->ref == REF_INTRA))        return 2;    if((abs(mvP->x - mvQ->x) >= 4) ||       (abs(mvP->y - mvQ->y) >= 4) ||       (mvP->ref != mvQ->ref))        return 1;    if (b) {        mvP += MV_BWD_OFFS;        mvQ += MV_BWD_OFFS;        if((abs(mvP->x - mvQ->x) >= 4) ||           (abs(mvP->y - mvQ->y) >= 4) ||           (mvP->ref != mvQ->ref))            return 1;    }    return 0;} #define SET_PARAMS                                                \    alpha = alpha_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)];  \    beta  =  beta_tab[av_clip_uintp2(qp_avg + h->beta_offset,  6)];  \    tc    =    tc_tab[av_clip_uintp2(qp_avg + h->alpha_offset, 6)]; /** * in-loop deblocking filter for a single macroblock * * boundary strength (bs) mapping: * * --4---5-- * 0   2   | * | 6 | 7 | * 1   3   | * --------- */void ff_cavs_filter(AVSContext *h, enum cavs_mb mb_type){    uint8_t bs[8];    int qp_avg, alpha, beta, tc;    int i;     /* save un-deblocked lines */    h->topleft_border_y = h->top_border_y[h->mbx * 16 + 15];    h->topleft_border_u = h->top_border_u[h->mbx * 10 + 8];    h->topleft_border_v = h->top_border_v[h->mbx * 10 + 8];    memcpy(&h->top_border_y[h->mbx * 16],     h->cy + 15 * h->l_stride, 16);    memcpy(&h->top_border_u[h->mbx * 10 + 1], h->cu +  7 * h->c_stride, 8);    memcpy(&h->top_border_v[h->mbx * 10 + 1], h->cv +  7 * h->c_stride, 8);    for (i = 0; i < 8; i++) {        h->left_border_y[i * 2 + 1] = *(h->cy + 15 + (i * 2 + 0) * h->l_stride);        h->left_border_y[i * 2 + 2] = *(h->cy + 15 + (i * 2 + 1) * h->l_stride);        h->left_border_u[i + 1]     = *(h->cu + 7  +  i          * h->c_stride);        h->left_border_v[i + 1]     = *(h->cv + 7  +  i          * h->c_stride);    }    if (!h->loop_filter_disable) {        /* determine bs */        if (mb_type == I_8X8)            memset(bs, 2, 8);        else {            memset(bs, 0, 8);            if (ff_cavs_partition_flags[mb_type] & SPLITV) {                bs[2] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X1], mb_type > P_8X8);                bs[3] = get_bs(&h->mv[MV_FWD_X2], &h->mv[MV_FWD_X3], mb_type > P_8X8);            }            if (ff_cavs_partition_flags[mb_type] & SPLITH) {                bs[6] = get_bs(&h->mv[MV_FWD_X0], &h->mv[MV_FWD_X2], mb_type > P_8X8);                bs[7] = get_bs(&h->mv[MV_FWD_X1], &h->mv[MV_FWD_X3], mb_type > P_8X8);            }            bs[0] = get_bs(&h->mv[MV_FWD_A1], &h->mv[MV_FWD_X0], mb_type > P_8X8);            bs[1] = get_bs(&h->mv[MV_FWD_A3], &h->mv[MV_FWD_X2], mb_type > P_8X8);            bs[4] = get_bs(&h->mv[MV_FWD_B2], &h->mv[MV_FWD_X0], mb_type > P_8X8);            bs[5] = get_bs(&h->mv[MV_FWD_B3], &h->mv[MV_FWD_X1], mb_type > P_8X8);        }        if (AV_RN64(bs)) {            if (h->flags & A_AVAIL) {                qp_avg = (h->qp + h->left_qp + 1) >> 1;                SET_PARAMS;                h->cdsp.cavs_filter_lv(h->cy, h->l_stride, alpha, beta, tc, bs[0], bs[1]);                qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->left_qp] + 1) >> 1;                SET_PARAMS;                h->cdsp.cavs_filter_cv(h->cu, h->c_stride, alpha, beta, tc, bs[0], bs[1]);                h->cdsp.cavs_filter_cv(h->cv, h->c_stride, alpha, beta, tc, bs[0], bs[1]);            }            qp_avg = h->qp;            SET_PARAMS;            h->cdsp.cavs_filter_lv(h->cy + 8,               h->l_stride, alpha, beta, tc, bs[2], bs[3]);            h->cdsp.cavs_filter_lh(h->cy + 8 * h->l_stride, h->l_stride, alpha, beta, tc, bs[6], bs[7]);             if (h->flags & B_AVAIL) {                qp_avg = (h->qp + h->top_qp[h->mbx] + 1) >> 1;                SET_PARAMS;                h->cdsp.cavs_filter_lh(h->cy, h->l_stride, alpha, beta, tc, bs[4], bs[5]);                qp_avg = (ff_cavs_chroma_qp[h->qp] + ff_cavs_chroma_qp[h->top_qp[h->mbx]] + 1) >> 1;                SET_PARAMS;                h->cdsp.cavs_filter_ch(h->cu, h->c_stride, alpha, beta, tc, bs[4], bs[5]);                h->cdsp.cavs_filter_ch(h->cv, h->c_stride, alpha, beta, tc, bs[4], bs[5]);            }        }    }    h->left_qp        = h->qp;    h->top_qp[h->mbx] = h->qp;} #undef SET_PARAMS /***************************************************************************** * * spatial intra prediction * ****************************************************************************/ void ff_cavs_load_intra_pred_luma(AVSContext *h, uint8_t *top,                                  uint8_t **left, int block){    int i;     switch (block) {    case 0:        *left               = h->left_border_y;        h->left_border_y[0] = h->left_border_y[1];        memset(&h->left_border_y[17], h->left_border_y[16], 9);        memcpy(&top[1], &h->top_border_y[h->mbx * 16], 16);        top[17] = top[16];        top[0]  = top[1];        if ((h->flags & A_AVAIL) && (h->flags & B_AVAIL))            h->left_border_y[0] = top[0] = h->topleft_border_y;        break;    case 1:        *left = h->intern_border_y;        for (i = 0; i < 8; i++)            h->intern_border_y[i + 1] = *(h->cy + 7 + i * h->l_stride);        memset(&h->intern_border_y[9], h->intern_border_y[8], 9);        h->intern_border_y[0] = h->intern_border_y[1];        memcpy(&top[1], &h->top_border_y[h->mbx * 16 + 8], 8);        if (h->flags & C_AVAIL)            memcpy(&top[9], &h->top_border_y[(h->mbx + 1) * 16], 8);        else            memset(&top[9], top[8], 9);        top[17] = top[16];        top[0]  = top[1];        if (h->flags & B_AVAIL)            h->intern_border_y[0] = top[0] = h->top_border_y[h->mbx * 16 + 7];        break;    case 2:        *left = &h->left_border_y[8];        memcpy(&top[1], h->cy + 7 * h->l_stride, 16);        top[17] = top[16];        top[0]  = top[1];        if (h->flags & A_AVAIL)            top[0] = h->left_border_y[8];        break;    case 3:        *left = &h->intern_border_y[8];        for (i = 0; i < 8; i++)            h->intern_border_y[i + 9] = *(h->cy + 7 + (i + 8) * h->l_stride);        memset(&h->intern_border_y[17], h->intern_border_y[16], 9);        memcpy(&top[0], h->cy + 7 + 7 * h->l_stride, 9);        memset(&top[9], top[8], 9);        break;    }} void ff_cavs_load_intra_pred_chroma(AVSContext *h){    /* extend borders by one pixel */    h->left_border_u[9]              = h->left_border_u[8];    h->left_border_v[9]              = h->left_border_v[8];    if(h->flags & C_AVAIL) {        h->top_border_u[h->mbx*10 + 9] = h->top_border_u[h->mbx*10 + 11];        h->top_border_v[h->mbx*10 + 9] = h->top_border_v[h->mbx*10 + 11];    } else {        h->top_border_u[h->mbx * 10 + 9] = h->top_border_u[h->mbx * 10 + 8];        h->top_border_v[h->mbx * 10 + 9] = h->top_border_v[h->mbx * 10 + 8];    }    if((h->flags & A_AVAIL) && (h->flags & B_AVAIL)) {        h->top_border_u[h->mbx * 10] = h->left_border_u[0] = h->topleft_border_u;        h->top_border_v[h->mbx * 10] = h->left_border_v[0] = h->topleft_border_v;    } else {        h->left_border_u[0]          = h->left_border_u[1];        h->left_border_v[0]          = h->left_border_v[1];        h->top_border_u[h->mbx * 10] = h->top_border_u[h->mbx * 10 + 1];        h->top_border_v[h->mbx * 10] = h->top_border_v[h->mbx * 10 + 1];    }} static void intra_pred_vert(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int y;    uint64_t a = AV_RN64(&top[1]);    for (y = 0; y < 8; y++)        *((uint64_t *)(d + y * stride)) = a;} static void intra_pred_horiz(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int y;    uint64_t a;    for (y = 0; y < 8; y++) {        a = left[y + 1] * 0x0101010101010101ULL;        *((uint64_t *)(d + y * stride)) = a;    }} static void intra_pred_dc_128(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int y;    uint64_t a = 0x8080808080808080ULL;    for (y = 0; y < 8; y++)        *((uint64_t *)(d + y * stride)) = a;} static void intra_pred_plane(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int x, y, ia;    int ih = 0;    int iv = 0;    const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP;     for (x = 0; x < 4; x++) {        ih += (x + 1) *  (top[5 + x] -  top[3 - x]);        iv += (x + 1) * (left[5 + x] - left[3 - x]);    }    ia = (top[8] + left[8]) << 4;    ih = (17 * ih + 16) >> 5;    iv = (17 * iv + 16) >> 5;    for (y = 0; y < 8; y++)        for (x = 0; x < 8; x++)            d[y * stride + x] = cm[(ia + (x - 3) * ih + (y - 3) * iv + 16) >> 5];} #define LOWPASS(ARRAY, INDEX)                                           \    ((ARRAY[(INDEX) - 1] + 2 * ARRAY[(INDEX)] + ARRAY[(INDEX) + 1] + 2) >> 2) static void intra_pred_lp(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int x, y;    for (y = 0; y < 8; y++)        for (x = 0; x < 8; x++)            d[y * stride + x] = (LOWPASS(top, x + 1) + LOWPASS(left, y + 1)) >> 1;} static void intra_pred_down_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int x, y;    for (y = 0; y < 8; y++)        for (x = 0; x < 8; x++)            d[y * stride + x] = (LOWPASS(top, x + y + 2) + LOWPASS(left, x + y + 2)) >> 1;} static void intra_pred_down_right(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int x, y;    for (y = 0; y < 8; y++)        for (x = 0; x < 8; x++)            if (x == y)                d[y * stride + x] = (left[1] + 2 * top[0] + top[1] + 2) >> 2;            else if (x > y)                d[y * stride + x] = LOWPASS(top, x - y);            else                d[y * stride + x] = LOWPASS(left, y - x);} static void intra_pred_lp_left(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int x, y;    for (y = 0; y < 8; y++)        for (x = 0; x < 8; x++)            d[y * stride + x] = LOWPASS(left, y + 1);} static void intra_pred_lp_top(uint8_t *d, uint8_t *top, uint8_t *left, ptrdiff_t stride){    int x, y;    for (y = 0; y < 8; y++)        for (x = 0; x < 8; x++)            d[y * stride + x] = LOWPASS(top, x + 1);} #undef LOWPASS static inline void modify_pred(const int8_t *mod_table, int *mode){    *mode = mod_table[*mode];    if (*mode < 0) {        av_log(NULL, AV_LOG_ERROR, "Illegal intra prediction mode\n");        *mode = 0;    }} void ff_cavs_modify_mb_i(AVSContext *h, int *pred_mode_uv){    /* save pred modes before they get modified */    h->pred_mode_Y[3]             = h->pred_mode_Y[5];    h->pred_mode_Y[6]             = h->pred_mode_Y[8];    h->top_pred_Y[h->mbx * 2 + 0] = h->pred_mode_Y[7];    h->top_pred_Y[h->mbx * 2 + 1] = h->pred_mode_Y[8];     /* modify pred modes according to availability of neighbour samples */    if (!(h->flags & A_AVAIL)) {        modify_pred(left_modifier_l, &h->pred_mode_Y[4]);        modify_pred(left_modifier_l, &h->pred_mode_Y[7]);        modify_pred(left_modifier_c, pred_mode_uv);    }    if (!(h->flags & B_AVAIL)) {        modify_pred(top_modifier_l, &h->pred_mode_Y[4]);        modify_pred(top_modifier_l, &h->pred_mode_Y[5]);        modify_pred(top_modifier_c, pred_mode_uv);    }} /***************************************************************************** * * motion compensation * ****************************************************************************/ static inline void mc_dir_part(AVSContext *h, AVFrame *pic, int chroma_height,                               int delta, int list, uint8_t *dest_y,                               uint8_t *dest_cb, uint8_t *dest_cr,                               int src_x_offset, int src_y_offset,                               qpel_mc_func *qpix_op,                               h264_chroma_mc_func chroma_op, cavs_vector *mv){    const int mx         = mv->x + src_x_offset * 8;    const int my         = mv->y + src_y_offset * 8;    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,                                 src_y - 2 - 2 * h->l_stride,                                 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, src_cb,                                 h->c_stride, 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, src_cr,                                 h->c_stride, 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],

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