mirror of https://github.com/FFmpeg/FFmpeg.git
Cleanup and integration by Diego Biurrun. Signed-off-by: Diego Biurrun <diego@biurrun.de>pull/125/head
Niels Möller
11 years ago
committed by
Diego Biurrun
parent
4da5aacc7e
commit
217e4ff4d1
10 changed files with 1718 additions and 32 deletions
@ -0,0 +1,747 @@ |
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/*
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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); |
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} |
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} |
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for (i = order; i < nsamples; i++) { |
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for (j = s = 0; j < order; j++) |
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s += (int64_t) c[j] * samples[i - 1 - j]; |
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/* NOTE: Equations seem to imply addition, while the
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* pseudocode seems to use subtraction.*/ |
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samples[i] -= av_clip((s + 0x8000) >> 16, -0x1000000, 0xffffff); |
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} |
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} |
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|
||||
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 bits = params->pancABIT0[param_index]; |
||||
int part0 = params->nSamplPart0[param_index]; |
||||
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; |
||||
} |
||||
Loading…
Reference in new issue