- int i, j;
- MPCContext *c = avctx->priv_data;
- GetBitContext gb;
- uint8_t buf[16];
- float f1=1.20050805774840750476 * 256;
- static int vlc_inited = 0;
-
- if(avctx->extradata_size < 16){
- av_log(avctx, AV_LOG_ERROR, "Too small extradata size (%i)!\n", avctx->extradata_size);
- return -1;
- }
- memset(c->oldDSCF, 0, sizeof(c->oldDSCF));
- c->rnd = 0xDEADBEEF;
- dsputil_init(&c->dsp, avctx);
- c->dsp.bswap_buf(buf, avctx->extradata, 4);
- ff_mpa_synth_init(mpa_window);
- init_get_bits(&gb, buf, 128);
-
- c->IS = get_bits1(&gb);
- c->MSS = get_bits1(&gb);
- c->bands = get_bits(&gb, 6);
- if(c->bands >= BANDS){
- av_log(avctx, AV_LOG_ERROR, "Too many bands: %i\n", c->bands);
- return -1;
- }
- skip_bits(&gb, 88);
- c->gapless = get_bits1(&gb);
- c->lastframelen = get_bits(&gb, 11);
- av_log(avctx, AV_LOG_DEBUG, "IS: %d, MSS: %d, TG: %d, LFL: %d, bands: %d\n",
- c->IS, c->MSS, c->gapless, c->lastframelen, c->bands);
- c->frames_to_skip = 0;
-
- if(vlc_inited) return 0;
- av_log(avctx, AV_LOG_DEBUG, "Initing VLC\n");
- if(init_vlc(&scfi_vlc, MPC7_SCFI_BITS, MPC7_SCFI_SIZE,
- &mpc7_scfi[1], 2, 1,
- &mpc7_scfi[0], 2, 1, INIT_VLC_USE_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init SCFI VLC\n");
- return -1;
- }
- if(init_vlc(&dscf_vlc, MPC7_DSCF_BITS, MPC7_DSCF_SIZE,
- &mpc7_dscf[1], 2, 1,
- &mpc7_dscf[0], 2, 1, INIT_VLC_USE_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init DSCF VLC\n");
- return -1;
- }
- if(init_vlc(&hdr_vlc, MPC7_HDR_BITS, MPC7_HDR_SIZE,
- &mpc7_hdr[1], 2, 1,
- &mpc7_hdr[0], 2, 1, INIT_VLC_USE_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init HDR VLC\n");
- return -1;
- }
- for(i = 0; i < MPC7_QUANT_VLC_TABLES; i++){
- for(j = 0; j < 2; j++){
- if(init_vlc(&quant_vlc[i][j], 9, mpc7_quant_vlc_sizes[i],
- &mpc7_quant_vlc[i][j][1], 4, 2,
- &mpc7_quant_vlc[i][j][0], 4, 2, INIT_VLC_USE_STATIC)){
- av_log(avctx, AV_LOG_ERROR, "Cannot init QUANT VLC %i,%i\n",i,j);
- return -1;
- }
- }
- }
- vlc_inited = 1;
- return 0;
-}
-
-// XXX replace with something better
-static int av_always_inline mpc_rnd(MPCContext *c)
-{
- c->rnd = c->rnd * 27 + 17;
- return c->rnd;