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748 lines
32 KiB
C
748 lines
32 KiB
C
/*
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* DCA XLL extension
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*
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* Copyright (C) 2012 Paul B Mahol
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* Copyright (C) 2014 Niels Möller
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/attributes.h"
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#include "libavutil/common.h"
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#include "libavutil/internal.h"
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#include "avcodec.h"
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#include "dca.h"
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#include "dcadata.h"
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#include "get_bits.h"
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#include "unary.h"
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/* Sign as bit 0 */
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static inline int get_bits_sm(GetBitContext *s, unsigned n)
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{
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int x = get_bits(s, n);
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if (x & 1)
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return -(x >> 1) - 1;
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else
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return x >> 1;
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}
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/* Return -1 on error. */
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static int32_t get_dmix_coeff(DCAContext *s, int inverse)
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{
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unsigned code = get_bits(&s->gb, 9);
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int32_t sign = (int32_t) (code >> 8) - 1;
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unsigned idx = code & 0xff;
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int inv_offset = FF_DCA_DMIXTABLE_SIZE -FF_DCA_INV_DMIXTABLE_SIZE;
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if (idx >= FF_DCA_DMIXTABLE_SIZE) {
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av_log(s->avctx, AV_LOG_ERROR,
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"XLL: Invalid channel set downmix code %x\n", code);
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return -1;
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} else if (!inverse) {
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return (ff_dca_dmixtable[idx] ^ sign) - sign;
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} else if (idx < inv_offset) {
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av_log(s->avctx, AV_LOG_ERROR,
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"XLL: Invalid channel set inverse downmix code %x\n", code);
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return -1;
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} else {
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return (ff_dca_inv_dmixtable[idx - inv_offset] ^ sign) - sign;
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}
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}
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static int32_t dca_get_dmix_coeff(DCAContext *s)
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{
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return get_dmix_coeff(s, 0);
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}
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static int32_t dca_get_inv_dmix_coeff(DCAContext *s)
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{
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return get_dmix_coeff(s, 1);
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}
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/* parse XLL header */
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int ff_dca_xll_decode_header(DCAContext *s)
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{
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int hdr_pos, hdr_size;
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av_unused int version, frame_size;
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int i, chset_index;
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/* get bit position of sync header */
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hdr_pos = get_bits_count(&s->gb) - 32;
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version = get_bits(&s->gb, 4) + 1;
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hdr_size = get_bits(&s->gb, 8) + 1;
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frame_size = get_bits_long(&s->gb, get_bits(&s->gb, 5) + 1) + 1;
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s->xll_channels =
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s->xll_residual_channels = 0;
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s->xll_nch_sets = get_bits(&s->gb, 4) + 1;
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s->xll_segments = 1 << get_bits(&s->gb, 4);
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s->xll_log_smpl_in_seg = get_bits(&s->gb, 4);
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s->xll_smpl_in_seg = 1 << s->xll_log_smpl_in_seg;
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s->xll_bits4seg_size = get_bits(&s->gb, 5) + 1;
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s->xll_banddata_crc = get_bits(&s->gb, 2);
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s->xll_scalable_lsb = get_bits1(&s->gb);
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s->xll_bits4ch_mask = get_bits(&s->gb, 5) + 1;
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if (s->xll_scalable_lsb) {
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s->xll_fixed_lsb_width = get_bits(&s->gb, 4);
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if (s->xll_fixed_lsb_width)
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av_log(s->avctx, AV_LOG_WARNING,
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"XLL: fixed lsb width = %d, non-zero not supported.\n",
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s->xll_fixed_lsb_width);
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}
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/* skip to the end of the common header */
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i = get_bits_count(&s->gb);
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if (hdr_pos + hdr_size * 8 > i)
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skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i);
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for (chset_index = 0; chset_index < s->xll_nch_sets; chset_index++) {
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XllChSetSubHeader *chset = &s->xll_chsets[chset_index];
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hdr_pos = get_bits_count(&s->gb);
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hdr_size = get_bits(&s->gb, 10) + 1;
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chset->channels = get_bits(&s->gb, 4) + 1;
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chset->residual_encode = get_bits(&s->gb, chset->channels);
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chset->bit_resolution = get_bits(&s->gb, 5) + 1;
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chset->bit_width = get_bits(&s->gb, 5) + 1;
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chset->sampling_frequency = ff_dca_sampling_freqs[get_bits(&s->gb, 4)];
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chset->samp_freq_interp = get_bits(&s->gb, 2);
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chset->replacement_set = get_bits(&s->gb, 2);
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if (chset->replacement_set)
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chset->active_replace_set = get_bits(&s->gb, 1);
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if (s->one2one_map_chtospkr) {
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chset->primary_ch_set = get_bits(&s->gb, 1);
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chset->downmix_coeff_code_embedded = get_bits(&s->gb, 1);
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if (chset->downmix_coeff_code_embedded) {
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chset->downmix_embedded = get_bits(&s->gb, 1);
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if (chset->primary_ch_set) {
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chset->downmix_type = get_bits(&s->gb, 3);
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if (chset->downmix_type > 6) {
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av_log(s->avctx, AV_LOG_ERROR,
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"XLL: Invalid channel set downmix type\n");
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return AVERROR_INVALIDDATA;
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}
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}
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}
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chset->hier_chset = get_bits(&s->gb, 1);
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if (chset->downmix_coeff_code_embedded) {
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/* nDownmixCoeffs is specified as N * M. For a primary
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* channel set, it appears that N = number of
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* channels, and M is the number of downmix channels.
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*
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* For a non-primary channel set, N is specified as
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* number of channels + 1, and M is derived from the
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* channel set hierarchy, and at least in simple cases
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* M is the number of channels in preceding channel
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* sets. */
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if (chset->primary_ch_set) {
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static const char dmix_table[7] = { 1, 2, 2, 3, 3, 4, 4 };
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chset->downmix_ncoeffs = chset->channels * dmix_table[chset->downmix_type];
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} else
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chset->downmix_ncoeffs = (chset->channels + 1) * s->xll_channels;
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if (chset->downmix_ncoeffs > DCA_XLL_DMIX_NCOEFFS_MAX) {
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avpriv_request_sample(s->avctx,
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"XLL: More than %d downmix coefficients",
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DCA_XLL_DMIX_NCOEFFS_MAX);
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return AVERROR_PATCHWELCOME;
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} else if (chset->primary_ch_set) {
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for (i = 0; i < chset->downmix_ncoeffs; i++)
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if ((chset->downmix_coeffs[i] = dca_get_dmix_coeff(s)) == -1)
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return AVERROR_INVALIDDATA;
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} else {
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unsigned c, r;
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for (c = 0, i = 0; c < s->xll_channels; c++, i += chset->channels + 1) {
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if ((chset->downmix_coeffs[i] = dca_get_inv_dmix_coeff(s)) == -1)
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return AVERROR_INVALIDDATA;
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for (r = 1; r <= chset->channels; r++) {
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int32_t coeff = dca_get_dmix_coeff(s);
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if (coeff == -1)
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return AVERROR_INVALIDDATA;
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chset->downmix_coeffs[i + r] =
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(chset->downmix_coeffs[i] * (int64_t) coeff + (1 << 15)) >> 16;
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}
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}
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}
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}
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chset->ch_mask_enabled = get_bits(&s->gb, 1);
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if (chset->ch_mask_enabled)
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chset->ch_mask = get_bits(&s->gb, s->xll_bits4ch_mask);
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else
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/* Skip speaker configuration bits */
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skip_bits_long(&s->gb, 25 * chset->channels);
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} else {
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chset->primary_ch_set = 1;
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chset->downmix_coeff_code_embedded = 0;
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/* Spec: NumChHierChSet = 0, NumDwnMixCodeCoeffs = 0, whatever that means. */
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chset->mapping_coeffs_present = get_bits(&s->gb, 1);
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if (chset->mapping_coeffs_present) {
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avpriv_report_missing_feature(s->avctx, "XLL: mapping coefficients");
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return AVERROR_PATCHWELCOME;
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}
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}
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if (chset->sampling_frequency > 96000)
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chset->num_freq_bands = 2 * (1 + get_bits(&s->gb, 1));
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else
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chset->num_freq_bands = 1;
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if (chset->num_freq_bands > 1) {
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avpriv_report_missing_feature(s->avctx, "XLL: num_freq_bands > 1");
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return AVERROR_PATCHWELCOME;
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}
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if (get_bits(&s->gb, 1)) { /* pw_ch_decor_enabled */
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int bits = av_ceil_log2(chset->channels);
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for (i = 0; i < chset->channels; i++) {
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unsigned j = get_bits(&s->gb, bits);
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if (j >= chset->channels) {
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av_log(s->avctx, AV_LOG_ERROR,
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"Original channel order value %u too large, only %d channels.\n",
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j, chset->channels);
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return AVERROR_INVALIDDATA;
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}
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chset->orig_chan_order[0][i] = j;
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chset->orig_chan_order_inv[0][j] = i;
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}
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for (i = 0; i < chset->channels / 2; i++) {
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if (get_bits(&s->gb, 1)) /* bChPFlag */
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chset->pw_ch_pairs_coeffs[0][i] = get_bits_sm(&s->gb, 7);
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else
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chset->pw_ch_pairs_coeffs[0][i] = 0;
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}
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} else {
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for (i = 0; i < chset->channels; i++)
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chset->orig_chan_order[0][i] =
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chset->orig_chan_order_inv[0][i] = i;
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for (i = 0; i < chset->channels / 2; i++)
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chset->pw_ch_pairs_coeffs[0][i] = 0;
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}
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/* Adaptive prediction order */
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chset->adapt_order_max[0] = 0;
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for (i = 0; i < chset->channels; i++) {
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chset->adapt_order[0][i] = get_bits(&s->gb, 4);
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if (chset->adapt_order_max[0] < chset->adapt_order[0][i])
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chset->adapt_order_max[0] = chset->adapt_order[0][i];
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}
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/* Fixed prediction order, used in case the adaptive order
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* above is zero */
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for (i = 0; i < chset->channels; i++)
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chset->fixed_order[0][i] =
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chset->adapt_order[0][i] ? 0 : get_bits(&s->gb, 2);
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for (i = 0; i < chset->channels; i++) {
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unsigned j;
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for (j = 0; j < chset->adapt_order[0][i]; j++)
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chset->lpc_refl_coeffs_q_ind[0][i][j] = get_bits(&s->gb, 8);
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}
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if (s->xll_scalable_lsb) {
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chset->lsb_fsize[0] = get_bits(&s->gb, s->xll_bits4seg_size);
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for (i = 0; i < chset->channels; i++)
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chset->scalable_lsbs[0][i] = get_bits(&s->gb, 4);
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for (i = 0; i < chset->channels; i++)
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chset->bit_width_adj_per_ch[0][i] = get_bits(&s->gb, 4);
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} else {
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memset(chset->scalable_lsbs[0], 0,
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chset->channels * sizeof(chset->scalable_lsbs[0][0]));
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memset(chset->bit_width_adj_per_ch[0], 0,
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chset->channels * sizeof(chset->bit_width_adj_per_ch[0][0]));
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}
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s->xll_channels += chset->channels;
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s->xll_residual_channels += chset->channels -
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av_popcount(chset->residual_encode);
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/* FIXME: Parse header data for extra frequency bands. */
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/* Skip to end of channel set sub header. */
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i = get_bits_count(&s->gb);
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if (hdr_pos + 8 * hdr_size < i) {
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av_log(s->avctx, AV_LOG_ERROR,
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"chset header too large, %d bits, should be <= %d bits\n",
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i - hdr_pos, 8 * hdr_size);
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return AVERROR_INVALIDDATA;
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}
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if (hdr_pos + 8 * hdr_size > i)
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skip_bits_long(&s->gb, hdr_pos + 8 * hdr_size - i);
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}
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return 0;
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}
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/* parse XLL navigation table */
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int ff_dca_xll_decode_navi(DCAContext *s, int asset_end)
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{
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int nbands, band, chset, seg, data_start;
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/* FIXME: Supports only a single frequency band */
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nbands = 1;
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for (band = 0; band < nbands; band++) {
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s->xll_navi.band_size[band] = 0;
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for (seg = 0; seg < s->xll_segments; seg++) {
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/* Note: The spec, ETSI TS 102 114 V1.4.1 (2012-09), says
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* we should read a base value for segment_size from the
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* stream, before reading the sizes of the channel sets.
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* But that's apparently incorrect. */
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s->xll_navi.segment_size[band][seg] = 0;
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for (chset = 0; chset < s->xll_nch_sets; chset++)
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if (band < s->xll_chsets[chset].num_freq_bands) {
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s->xll_navi.chset_size[band][seg][chset] =
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get_bits(&s->gb, s->xll_bits4seg_size) + 1;
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s->xll_navi.segment_size[band][seg] +=
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s->xll_navi.chset_size[band][seg][chset];
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}
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s->xll_navi.band_size[band] += s->xll_navi.segment_size[band][seg];
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}
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}
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/* Align to 8 bits and skip 16-bit CRC. */
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skip_bits_long(&s->gb, 16 + ((-get_bits_count(&s->gb)) & 7));
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data_start = get_bits_count(&s->gb);
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if (data_start + 8 * s->xll_navi.band_size[0] > asset_end) {
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av_log(s->avctx, AV_LOG_ERROR,
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"XLL: Data in NAVI table exceeds containing asset\n"
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"start: %d (bit), size %u (bytes), end %d (bit), error %u\n",
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data_start, s->xll_navi.band_size[0], asset_end,
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data_start + 8 * s->xll_navi.band_size[0] - asset_end);
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return AVERROR_INVALIDDATA;
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}
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init_get_bits(&s->xll_navi.gb, s->gb.buffer + data_start / 8,
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8 * s->xll_navi.band_size[0]);
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return 0;
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}
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static void dca_xll_inv_adapt_pred(int *samples, int nsamples, unsigned order,
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const int *prev, const uint8_t *q_ind)
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{
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static const uint16_t table[0x81] = {
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0, 3070, 5110, 7140, 9156, 11154, 13132, 15085,
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17010, 18904, 20764, 22588, 24373, 26117, 27818, 29474,
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31085, 32648, 34164, 35631, 37049, 38418, 39738, 41008,
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42230, 43404, 44530, 45609, 46642, 47630, 48575, 49477,
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50337, 51157, 51937, 52681, 53387, 54059, 54697, 55302,
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55876, 56421, 56937, 57426, 57888, 58326, 58741, 59132,
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59502, 59852, 60182, 60494, 60789, 61066, 61328, 61576,
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61809, 62029, 62236, 62431, 62615, 62788, 62951, 63105,
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63250, 63386, 63514, 63635, 63749, 63855, 63956, 64051,
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64140, 64224, 64302, 64376, 64446, 64512, 64573, 64631,
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64686, 64737, 64785, 64830, 64873, 64913, 64950, 64986,
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65019, 65050, 65079, 65107, 65133, 65157, 65180, 65202,
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65222, 65241, 65259, 65275, 65291, 65306, 65320, 65333,
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65345, 65357, 65368, 65378, 65387, 65396, 65405, 65413,
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65420, 65427, 65434, 65440, 65446, 65451, 65456, 65461,
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65466, 65470, 65474, 65478, 65481, 65485, 65488, 65491,
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65535, /* Final value is for the -128 corner case, see below. */
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};
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int c[DCA_XLL_AORDER_MAX];
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int64_t s;
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unsigned i, j;
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for (i = 0; i < order; i++) {
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if (q_ind[i] & 1)
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/* The index value 0xff corresponds to a lookup of entry 0x80 in
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* the table, and no value is provided in the specification. */
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c[i] = -table[(q_ind[i] >> 1) + 1];
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else
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c[i] = table[q_ind[i] >> 1];
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}
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/* The description in the spec is a bit convoluted. We can convert
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* the reflected values to direct values in place, using a
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* sequence of reflections operating on two values. */
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for (i = 1; i < order; i++) {
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/* i = 1: scale c[0]
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* i = 2: reflect c[0] <-> c[1]
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* i = 3: scale c[1], reflect c[0] <-> c[2]
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* i = 4: reflect c[0] <-> c[3] reflect c[1] <-> c[2]
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* ... */
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if (i & 1)
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c[i / 2] += ((int64_t) c[i] * c[i / 2] + 0x8000) >> 16;
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for (j = 0; j < i / 2; j++) {
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int r0 = c[j];
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int r1 = c[i - j - 1];
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c[j] += ((int64_t) c[i] * r1 + 0x8000) >> 16;
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c[i - j - 1] += ((int64_t) c[i] * r0 + 0x8000) >> 16;
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}
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}
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/* Apply predictor. */
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/* NOTE: Processing samples in this order means that the
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* predictor is applied to the newly reconstructed samples. */
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if (prev) {
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for (i = 0; i < order; i++) {
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for (j = s = 0; j < i; j++)
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s += (int64_t) c[j] * samples[i - 1 - j];
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for (; j < order; j++)
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s += (int64_t) c[j] * prev[DCA_XLL_AORDER_MAX + i - 1 - j];
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|
|
samples[i] -= av_clip((s + 0x8000) >> 16, -0x1000000, 0xffffff);
|
|
}
|
|
}
|
|
for (i = order; i < nsamples; i++) {
|
|
for (j = s = 0; j < order; j++)
|
|
s += (int64_t) c[j] * samples[i - 1 - j];
|
|
|
|
/* NOTE: Equations seem to imply addition, while the
|
|
* pseudocode seems to use subtraction.*/
|
|
samples[i] -= av_clip((s + 0x8000) >> 16, -0x1000000, 0xffffff);
|
|
}
|
|
}
|
|
|
|
int ff_dca_xll_decode_audio(DCAContext *s, AVFrame *frame)
|
|
{
|
|
/* FIXME: Decodes only the first frequency band. */
|
|
int seg, chset_i;
|
|
|
|
/* Coding parameters for each channel set. */
|
|
struct coding_params {
|
|
int seg_type;
|
|
int rice_code_flag[16];
|
|
int pancAuxABIT[16];
|
|
int pancABIT0[16]; /* Not sure what this is */
|
|
int pancABIT[16]; /* Not sure what this is */
|
|
int nSamplPart0[16];
|
|
} param_state[16];
|
|
|
|
GetBitContext *gb = &s->xll_navi.gb;
|
|
int *history;
|
|
|
|
/* Layout: First the sample buffer for one segment per channel,
|
|
* followed by history buffers of DCA_XLL_AORDER_MAX samples for
|
|
* each channel. */
|
|
av_fast_malloc(&s->xll_sample_buf, &s->xll_sample_buf_size,
|
|
(s->xll_smpl_in_seg + DCA_XLL_AORDER_MAX) *
|
|
s->xll_channels * sizeof(*s->xll_sample_buf));
|
|
if (!s->xll_sample_buf)
|
|
return AVERROR(ENOMEM);
|
|
|
|
history = s->xll_sample_buf + s->xll_smpl_in_seg * s->xll_channels;
|
|
|
|
for (seg = 0; seg < s->xll_segments; seg++) {
|
|
unsigned in_channel;
|
|
|
|
for (chset_i = in_channel = 0; chset_i < s->xll_nch_sets; chset_i++) {
|
|
/* The spec isn't very explicit, but I think the NAVI sizes are in bytes. */
|
|
int end_pos = get_bits_count(gb) +
|
|
8 * s->xll_navi.chset_size[0][seg][chset_i];
|
|
int i, j;
|
|
struct coding_params *params = ¶m_state[chset_i];
|
|
/* I think this flag means that we should keep seg_type and
|
|
* other parameters from the previous segment. */
|
|
int use_seg_state_code_param;
|
|
XllChSetSubHeader *chset = &s->xll_chsets[chset_i];
|
|
if (in_channel >= s->avctx->channels)
|
|
/* FIXME: Could go directly to next segment */
|
|
goto next_chset;
|
|
|
|
if (s->avctx->sample_rate != chset->sampling_frequency) {
|
|
av_log(s->avctx, AV_LOG_WARNING,
|
|
"XLL: unexpected chset sample rate %d, expected %d\n",
|
|
chset->sampling_frequency, s->avctx->sample_rate);
|
|
goto next_chset;
|
|
}
|
|
if (seg != 0)
|
|
use_seg_state_code_param = get_bits(gb, 1);
|
|
else
|
|
use_seg_state_code_param = 0;
|
|
|
|
if (!use_seg_state_code_param) {
|
|
int num_param_sets, i;
|
|
unsigned bits4ABIT;
|
|
|
|
params->seg_type = get_bits(gb, 1);
|
|
num_param_sets = params->seg_type ? 1 : chset->channels;
|
|
|
|
if (chset->bit_width > 16) {
|
|
bits4ABIT = 5;
|
|
} else {
|
|
if (chset->bit_width > 8)
|
|
bits4ABIT = 4;
|
|
else
|
|
bits4ABIT = 3;
|
|
if (s->xll_nch_sets > 1)
|
|
bits4ABIT++;
|
|
}
|
|
|
|
for (i = 0; i < num_param_sets; i++) {
|
|
params->rice_code_flag[i] = get_bits(gb, 1);
|
|
if (!params->seg_type && params->rice_code_flag[i] && get_bits(gb, 1))
|
|
params->pancAuxABIT[i] = get_bits(gb, bits4ABIT) + 1;
|
|
else
|
|
params->pancAuxABIT[i] = 0;
|
|
}
|
|
|
|
for (i = 0; i < num_param_sets; i++) {
|
|
if (!seg) {
|
|
/* Parameters for part 1 */
|
|
params->pancABIT0[i] = get_bits(gb, bits4ABIT);
|
|
if (params->rice_code_flag[i] == 0 && params->pancABIT0[i] > 0)
|
|
/* For linear code */
|
|
params->pancABIT0[i]++;
|
|
|
|
/* NOTE: In the spec, not indexed by band??? */
|
|
if (params->seg_type == 0)
|
|
params->nSamplPart0[i] = chset->adapt_order[0][i];
|
|
else
|
|
params->nSamplPart0[i] = chset->adapt_order_max[0];
|
|
} else
|
|
params->nSamplPart0[i] = 0;
|
|
|
|
/* Parameters for part 2 */
|
|
params->pancABIT[i] = get_bits(gb, bits4ABIT);
|
|
if (params->rice_code_flag[i] == 0 && params->pancABIT[i] > 0)
|
|
/* For linear code */
|
|
params->pancABIT[i]++;
|
|
}
|
|
}
|
|
for (i = 0; i < chset->channels; i++) {
|
|
int param_index = params->seg_type ? 0 : i;
|
|
int part0 = params->nSamplPart0[param_index];
|
|
int bits = part0 ? params->pancABIT0[param_index] : 0;
|
|
int *sample_buf = s->xll_sample_buf +
|
|
(in_channel + i) * s->xll_smpl_in_seg;
|
|
|
|
if (!params->rice_code_flag[param_index]) {
|
|
/* Linear code */
|
|
if (bits)
|
|
for (j = 0; j < part0; j++)
|
|
sample_buf[j] = get_bits_sm(gb, bits);
|
|
else
|
|
memset(sample_buf, 0, part0 * sizeof(sample_buf[0]));
|
|
|
|
/* Second part */
|
|
bits = params->pancABIT[param_index];
|
|
if (bits)
|
|
for (j = part0; j < s->xll_smpl_in_seg; j++)
|
|
sample_buf[j] = get_bits_sm(gb, bits);
|
|
else
|
|
memset(sample_buf + part0, 0,
|
|
(s->xll_smpl_in_seg - part0) * sizeof(sample_buf[0]));
|
|
} else {
|
|
int aux_bits = params->pancAuxABIT[param_index];
|
|
|
|
for (j = 0; j < part0; j++) {
|
|
/* FIXME: Is this identical to Golomb code? */
|
|
int t = get_unary(gb, 1, 33) << bits;
|
|
/* FIXME: Could move this test outside of the loop, for efficiency. */
|
|
if (bits)
|
|
t |= get_bits(gb, bits);
|
|
sample_buf[j] = (t & 1) ? -(t >> 1) - 1 : (t >> 1);
|
|
}
|
|
|
|
/* Second part */
|
|
bits = params->pancABIT[param_index];
|
|
|
|
/* Follow the spec's suggestion of using the
|
|
* buffer also to store the hybrid-rice flags. */
|
|
memset(sample_buf + part0, 0,
|
|
(s->xll_smpl_in_seg - part0) * sizeof(sample_buf[0]));
|
|
|
|
if (aux_bits > 0) {
|
|
/* For hybrid rice encoding, some samples are linearly
|
|
* coded. According to the spec, "nBits4SamplLoci" bits
|
|
* are used for each index, but this value is not
|
|
* defined. I guess we should use log2(xll_smpl_in_seg)
|
|
* bits. */
|
|
int count = get_bits(gb, s->xll_log_smpl_in_seg);
|
|
av_log(s->avctx, AV_LOG_DEBUG, "aux count %d (bits %d)\n",
|
|
count, s->xll_log_smpl_in_seg);
|
|
|
|
for (j = 0; j < count; j++)
|
|
sample_buf[get_bits(gb, s->xll_log_smpl_in_seg)] = 1;
|
|
}
|
|
for (j = part0; j < s->xll_smpl_in_seg; j++) {
|
|
if (!sample_buf[j]) {
|
|
int t = get_unary(gb, 1, 33);
|
|
if (bits)
|
|
t = (t << bits) | get_bits(gb, bits);
|
|
sample_buf[j] = (t & 1) ? -(t >> 1) - 1 : (t >> 1);
|
|
} else
|
|
sample_buf[j] = get_bits_sm(gb, aux_bits);
|
|
}
|
|
}
|
|
}
|
|
|
|
for (i = 0; i < chset->channels; i++) {
|
|
unsigned adapt_order = chset->adapt_order[0][i];
|
|
int *sample_buf = s->xll_sample_buf +
|
|
(in_channel + i) * s->xll_smpl_in_seg;
|
|
int *prev = history + (in_channel + i) * DCA_XLL_AORDER_MAX;
|
|
|
|
if (!adapt_order) {
|
|
unsigned order;
|
|
for (order = chset->fixed_order[0][i]; order > 0; order--) {
|
|
unsigned j;
|
|
for (j = 1; j < s->xll_smpl_in_seg; j++)
|
|
sample_buf[j] += sample_buf[j - 1];
|
|
}
|
|
} else
|
|
/* Inverse adaptive prediction, in place. */
|
|
dca_xll_inv_adapt_pred(sample_buf, s->xll_smpl_in_seg,
|
|
adapt_order, seg ? prev : NULL,
|
|
chset->lpc_refl_coeffs_q_ind[0][i]);
|
|
memcpy(prev, sample_buf + s->xll_smpl_in_seg - DCA_XLL_AORDER_MAX,
|
|
DCA_XLL_AORDER_MAX * sizeof(*prev));
|
|
}
|
|
for (i = 1; i < chset->channels; i += 2) {
|
|
int coeff = chset->pw_ch_pairs_coeffs[0][i / 2];
|
|
if (coeff != 0) {
|
|
int *sample_buf = s->xll_sample_buf +
|
|
(in_channel + i) * s->xll_smpl_in_seg;
|
|
int *prev = sample_buf - s->xll_smpl_in_seg;
|
|
unsigned j;
|
|
for (j = 0; j < s->xll_smpl_in_seg; j++)
|
|
/* Shift is unspecified, but should apparently be 3. */
|
|
sample_buf[j] += ((int64_t) coeff * prev[j] + 4) >> 3;
|
|
}
|
|
}
|
|
|
|
if (s->xll_scalable_lsb) {
|
|
int lsb_start = end_pos - 8 * chset->lsb_fsize[0] -
|
|
8 * (s->xll_banddata_crc & 2);
|
|
int done;
|
|
i = get_bits_count(gb);
|
|
if (i > lsb_start) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"chset data lsb exceeds NAVI size, end_pos %d, lsb_start %d, pos %d\n",
|
|
end_pos, lsb_start, i);
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (i < lsb_start)
|
|
skip_bits_long(gb, lsb_start - i);
|
|
|
|
for (i = done = 0; i < chset->channels; i++) {
|
|
int bits = chset->scalable_lsbs[0][i];
|
|
if (bits > 0) {
|
|
/* The channel reordering is conceptually done
|
|
* before adding the lsb:s, so we need to do
|
|
* the inverse permutation here. */
|
|
unsigned pi = chset->orig_chan_order_inv[0][i];
|
|
int *sample_buf = s->xll_sample_buf +
|
|
(in_channel + pi) * s->xll_smpl_in_seg;
|
|
int adj = chset->bit_width_adj_per_ch[0][i];
|
|
int msb_shift = bits;
|
|
unsigned j;
|
|
|
|
if (adj > 0)
|
|
msb_shift += adj - 1;
|
|
|
|
for (j = 0; j < s->xll_smpl_in_seg; j++)
|
|
sample_buf[j] = (sample_buf[j] << msb_shift) +
|
|
(get_bits(gb, bits) << adj);
|
|
|
|
done += bits * s->xll_smpl_in_seg;
|
|
}
|
|
}
|
|
if (done > 8 * chset->lsb_fsize[0]) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"chset lsb exceeds lsb_size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
}
|
|
|
|
/* Store output. */
|
|
for (i = 0; i < chset->channels; i++) {
|
|
int *sample_buf = s->xll_sample_buf +
|
|
(in_channel + i) * s->xll_smpl_in_seg;
|
|
int shift = 1 - chset->bit_resolution;
|
|
int out_channel = chset->orig_chan_order[0][i];
|
|
float *out;
|
|
|
|
/* XLL uses the channel order C, L, R, and we want L,
|
|
* R, C. FIXME: Generalize. */
|
|
if (chset->ch_mask_enabled &&
|
|
(chset->ch_mask & 7) == 7 && out_channel < 3)
|
|
out_channel = out_channel ? out_channel - 1 : 2;
|
|
|
|
out_channel += in_channel;
|
|
if (out_channel >= s->avctx->channels)
|
|
continue;
|
|
|
|
out = (float *) frame->extended_data[out_channel];
|
|
out += seg * s->xll_smpl_in_seg;
|
|
|
|
/* NOTE: A one bit means residual encoding is *not* used. */
|
|
if ((chset->residual_encode >> i) & 1) {
|
|
/* Replace channel samples.
|
|
* FIXME: Most likely not the right thing to do. */
|
|
for (j = 0; j < s->xll_smpl_in_seg; j++)
|
|
out[j] = ldexpf(sample_buf[j], shift);
|
|
} else {
|
|
/* Add residual signal to core channel */
|
|
for (j = 0; j < s->xll_smpl_in_seg; j++)
|
|
out[j] += ldexpf(sample_buf[j], shift);
|
|
}
|
|
}
|
|
|
|
if (chset->downmix_coeff_code_embedded &&
|
|
!chset->primary_ch_set && chset->hier_chset) {
|
|
/* Undo hierarchical downmix of earlier channels. */
|
|
unsigned mix_channel;
|
|
for (mix_channel = 0; mix_channel < in_channel; mix_channel++) {
|
|
float *mix_buf;
|
|
const int *col;
|
|
float coeff;
|
|
unsigned row;
|
|
/* Similar channel reorder C, L, R vs L, R, C reorder. */
|
|
if (chset->ch_mask_enabled &&
|
|
(chset->ch_mask & 7) == 7 && mix_channel < 3)
|
|
mix_buf = (float *) frame->extended_data[mix_channel ? mix_channel - 1 : 2];
|
|
else
|
|
mix_buf = (float *) frame->extended_data[mix_channel];
|
|
|
|
mix_buf += seg * s->xll_smpl_in_seg;
|
|
col = &chset->downmix_coeffs[mix_channel * (chset->channels + 1)];
|
|
|
|
/* Scale */
|
|
coeff = ldexpf(col[0], -16);
|
|
for (j = 0; j < s->xll_smpl_in_seg; j++)
|
|
mix_buf[j] *= coeff;
|
|
|
|
for (row = 0;
|
|
row < chset->channels && in_channel + row < s->avctx->channels;
|
|
row++)
|
|
if (col[row + 1]) {
|
|
const float *new_channel =
|
|
(const float *) frame->extended_data[in_channel + row];
|
|
new_channel += seg * s->xll_smpl_in_seg;
|
|
coeff = ldexpf(col[row + 1], -15);
|
|
for (j = 0; j < s->xll_smpl_in_seg; j++)
|
|
mix_buf[j] -= coeff * new_channel[j];
|
|
}
|
|
}
|
|
}
|
|
|
|
next_chset:
|
|
in_channel += chset->channels;
|
|
/* Skip to next channel set using the NAVI info. */
|
|
i = get_bits_count(gb);
|
|
if (i > end_pos) {
|
|
av_log(s->avctx, AV_LOG_ERROR,
|
|
"chset data exceeds NAVI size\n");
|
|
return AVERROR_INVALIDDATA;
|
|
}
|
|
if (i < end_pos)
|
|
skip_bits_long(gb, end_pos - i);
|
|
}
|
|
}
|
|
return 0;
|
|
}
|