diff options
Diffstat (limited to 'ffmpeg/libavcodec/cavs.c')
| -rw-r--r-- | ffmpeg/libavcodec/cavs.c | 790 |
1 files changed, 790 insertions, 0 deletions
diff --git a/ffmpeg/libavcodec/cavs.c b/ffmpeg/libavcodec/cavs.c new file mode 100644 index 0000000..dffd6cc --- /dev/null +++ b/ffmpeg/libavcodec/cavs.c @@ -0,0 +1,790 @@ +/* + * 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 "avcodec.h" +#include "get_bits.h" +#include "golomb.h" +#include "h264chroma.h" +#include "mathops.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)) + 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)) + return 1; + } else { + if (mvP->ref != mvQ->ref) + return 1; + } + return 0; +} + +#define SET_PARAMS \ + alpha = alpha_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)]; \ + beta = beta_tab[av_clip(qp_avg + h->beta_offset, 0, 63)]; \ + tc = tc_tab[av_clip(qp_avg + h->alpha_offset, 0, 63)]; + +/** + * 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]); + 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]); + 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]; + 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->mbx && h->mby) { + 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,int 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,int 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,int 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,int stride) +{ + int x, y, ia; + int ih = 0; + int iv = 0; + uint8_t *cm = ff_cropTbl + 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,int 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,int 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,int 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,int 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,int 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; + int emu=0; + 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; + + 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, + 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; + } + + qpix_op[luma_xy](dest_y, src_y, h->l_stride); //FIXME try variable height perhaps? + + if(emu){ + h->vdsp.emulated_edge_mc(h->edge_emu_buffer, 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, 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 += 2*x_offset + 2*y_offset*h->l_stride; + 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; +} |