static int dvvideo_init(AVCodecContext *avctx) { DVVideoContext *s = avctx->priv_data; DSPContext dsp; static int done=0; int i, j; if (!done) { VLC dv_vlc; uint16_t new_dv_vlc_bits[NB_DV_VLC*2]; uint8_t new_dv_vlc_len[NB_DV_VLC*2]; uint8_t new_dv_vlc_run[NB_DV_VLC*2]; int16_t new_dv_vlc_level[NB_DV_VLC*2]; done = 1; dv_vlc_map = av_mallocz_static(DV_VLC_MAP_LEV_SIZE*DV_VLC_MAP_RUN_SIZE*sizeof(struct dv_vlc_pair)); if (!dv_vlc_map) return -ENOMEM; /* dv_anchor lets each thread know its Id */ dv_anchor = av_malloc(12*27*sizeof(void*)); if (!dv_anchor) { return -ENOMEM; } for (i=0; i<12*27; i++) dv_anchor[i] = (void*)(size_t)i; /* it's faster to include sign bit in a generic VLC parsing scheme */ for (i=0, j=0; i<NB_DV_VLC; i++, j++) { new_dv_vlc_bits[j] = dv_vlc_bits[i]; new_dv_vlc_len[j] = dv_vlc_len[i]; new_dv_vlc_run[j] = dv_vlc_run[i]; new_dv_vlc_level[j] = dv_vlc_level[i]; if (dv_vlc_level[i]) { new_dv_vlc_bits[j] <<= 1; new_dv_vlc_len[j]++; j++; new_dv_vlc_bits[j] = (dv_vlc_bits[i] << 1) | 1; new_dv_vlc_len[j] = dv_vlc_len[i] + 1; new_dv_vlc_run[j] = dv_vlc_run[i]; new_dv_vlc_level[j] = -dv_vlc_level[i]; } } /* NOTE: as a trick, we use the fact the no codes are unused to accelerate the parsing of partial codes */ init_vlc(&dv_vlc, TEX_VLC_BITS, j, new_dv_vlc_len, 1, 1, new_dv_vlc_bits, 2, 2, 0); dv_rl_vlc = av_malloc(dv_vlc.table_size * sizeof(RL_VLC_ELEM)); if (!dv_rl_vlc) { av_free(dv_anchor); return -ENOMEM; } for(i = 0; i < dv_vlc.table_size; i++){ int code= dv_vlc.table[i][0]; int len = dv_vlc.table[i][1]; int level, run; if(len<0){ //more bits needed run= 0; level= code; } else { run= new_dv_vlc_run[code] + 1; level= new_dv_vlc_level[code]; } dv_rl_vlc[i].len = len; dv_rl_vlc[i].level = level; dv_rl_vlc[i].run = run; } free_vlc(&dv_vlc); for (i = 0; i < NB_DV_VLC - 1; i++) { if (dv_vlc_run[i] >= DV_VLC_MAP_RUN_SIZE) continue; #ifdef DV_CODEC_TINY_TARGET if (dv_vlc_level[i] >= DV_VLC_MAP_LEV_SIZE) continue; #endif if (dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size != 0) continue; dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].vlc = dv_vlc_bits[i] << (!!dv_vlc_level[i]); dv_vlc_map[dv_vlc_run[i]][dv_vlc_level[i]].size = dv_vlc_len[i] + (!!dv_vlc_level[i]); } for (i = 0; i < DV_VLC_MAP_RUN_SIZE; i++) { #ifdef DV_CODEC_TINY_TARGET for (j = 1; j < DV_VLC_MAP_LEV_SIZE; j++) { if (dv_vlc_map[i][j].size == 0) { dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + dv_vlc_map[0][j].size; } } #else for (j = 1; j < DV_VLC_MAP_LEV_SIZE/2; j++) { if (dv_vlc_map[i][j].size == 0) { dv_vlc_map[i][j].vlc = dv_vlc_map[0][j].vlc | (dv_vlc_map[i-1][0].vlc << (dv_vlc_map[0][j].size)); dv_vlc_map[i][j].size = dv_vlc_map[i-1][0].size + dv_vlc_map[0][j].size; } dv_vlc_map[i][((uint16_t)(-j))&0x1ff].vlc = dv_vlc_map[i][j].vlc | 1; dv_vlc_map[i][((uint16_t)(-j))&0x1ff].size = dv_vlc_map[i][j].size; } #endif } } /* Generic DSP setup */ dsputil_init(&dsp, avctx); s->get_pixels = dsp.get_pixels; /* 88DCT setup */ s->fdct[0] = dsp.fdct; s->idct_put[0] = dsp.idct_put; for (i=0; i<64; i++) s->dv_zigzag[0][i] = dsp.idct_permutation[ff_zigzag_direct[i]]; /* 248DCT setup */ s->fdct[1] = dsp.fdct248; s->idct_put[1] = simple_idct248_put; // FIXME: need to add it to DSP if(avctx->lowres){ for (i=0; i<64; i++){ int j= ff_zigzag248_direct[i]; s->dv_zigzag[1][i] = dsp.idct_permutation[(j&7) + (j&8)*4 + (j&48)/2]; } }else memcpy(s->dv_zigzag[1], ff_zigzag248_direct, 64); /* XXX: do it only for constant case */ dv_build_unquantize_tables(s, dsp.idct_permutation); /* FIXME: I really don't think this should be here */ if (dv_codec_profile(avctx)) avctx->pix_fmt = dv_codec_profile(avctx)->pix_fmt; avctx->coded_frame = &s->picture; s->avctx= avctx; return 0; }