/* * AAC decoder * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org ) * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com ) * Copyright (c) 2008-2013 Alex Converse <alex.converse@gmail.com> * * AAC LATM decoder * Copyright (c) 2008-2010 Paul Kendall <paul@kcbbs.gen.nz> * Copyright (c) 2010      Janne Grunau <janne-libav@jannau.net> * * AAC decoder fixed-point implementation * Copyright (c) 2013 *      MIPS Technologies, Inc., California. * * 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 */ #ifndef AVCODEC_AAC_AACDEC_FLOAT_COUPLING_H#define AVCODEC_AAC_AACDEC_FLOAT_COUPLING_H #include "aacdec.h" /** * Apply dependent channel coupling (applied before IMDCT). * * @param   index   index into coupling gain array */static void AAC_RENAME(apply_dependent_coupling)(AACDecContext *ac,                                                 SingleChannelElement *target,                                                 ChannelElement *cce, int index){    IndividualChannelStream *ics = &cce->ch[0].ics;    const uint16_t *offsets = ics->swb_offset;    float *dest = target->coeffs;    const float *src = cce->ch[0].coeffs;    int g, i, group, k, idx = 0;    if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP) {        av_log(ac->avctx, AV_LOG_ERROR,               "Dependent coupling is not supported together with LTP\n");        return;    }    for (g = 0; g < ics->num_window_groups; g++) {        for (i = 0; i < ics->max_sfb; i++, idx++) {            if (cce->ch[0].band_type[idx] != ZERO_BT) {                const float gain = cce->coup.gain[index][idx];                for (group = 0; group < ics->group_len[g]; group++) {                    for (k = offsets[i]; k < offsets[i + 1]; k++) {                        // FIXME: SIMDify                        dest[group * 128 + k] += gain * src[group * 128 + k];                    }                }            }        }        dest += ics->group_len[g] * 128;        src  += ics->group_len[g] * 128;    }} /** * Apply independent channel coupling (applied after IMDCT). * * @param   index   index into coupling gain array */static void AAC_RENAME(apply_independent_coupling)(AACDecContext *ac,                                                   SingleChannelElement *target,                                                   ChannelElement *cce, int index){    const float gain = cce->coup.gain[index][0];    const float *src = cce->ch[0].output;    float *dest = target->output;    const int len = 1024 << (ac->oc[1].m4ac.sbr == 1);     ac->fdsp->vector_fmac_scalar(dest, src, gain, len);} #endif /* AVCODEC_AAC_AACDEC_FLOAT_COUPLING_H */