diff options
author | foo86 <foobaz86@gmail.com> | 2016-01-16 11:07:08 +0300 |
---|---|---|
committer | Hendrik Leppkes <h.leppkes@gmail.com> | 2016-01-31 19:09:38 +0300 |
commit | 46089967722f74e794865a044f5f682f26628802 (patch) | |
tree | b4ca91d42d3eb0da3229d217323565738c101f87 /libavcodec/dca_xll.c | |
parent | b552f3afa2a76142c9aa87a89e31e75423b4cd3b (diff) |
avcodec/dca: remove old decoder
Remove all files and functions which are not going to be reused,
and disable all functions and FATE tests temporarily which will be.
Diffstat (limited to 'libavcodec/dca_xll.c')
-rw-r--r-- | libavcodec/dca_xll.c | 747 |
1 files changed, 0 insertions, 747 deletions
diff --git a/libavcodec/dca_xll.c b/libavcodec/dca_xll.c deleted file mode 100644 index 98fd4c8eaa..0000000000 --- a/libavcodec/dca_xll.c +++ /dev/null @@ -1,747 +0,0 @@ -/* - * DCA XLL extension - * - * Copyright (C) 2012 Paul B Mahol - * Copyright (C) 2014 Niels Möller - * - * 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 - */ - -#include "libavutil/attributes.h" -#include "libavutil/common.h" -#include "libavutil/internal.h" - -#include "avcodec.h" -#include "dca.h" -#include "dcadata.h" -#include "get_bits.h" -#include "unary.h" - -/* Sign as bit 0 */ -static inline int get_bits_sm(GetBitContext *s, unsigned n) -{ - int x = get_bits(s, n); - if (x & 1) - return -(x >> 1) - 1; - else - return x >> 1; -} - -/* Return -1 on error. */ -static int32_t get_dmix_coeff(DCAContext *s, int inverse) -{ - unsigned code = get_bits(&s->gb, 9); - int32_t sign = (int32_t) (code >> 8) - 1; - unsigned idx = code & 0xff; - int inv_offset = FF_DCA_DMIXTABLE_SIZE -FF_DCA_INV_DMIXTABLE_SIZE; - if (idx >= FF_DCA_DMIXTABLE_SIZE) { - av_log(s->avctx, AV_LOG_ERROR, - "XLL: Invalid channel set downmix code %x\n", code); - return -1; - } else if (!inverse) { - return (ff_dca_dmixtable[idx] ^ sign) - sign; - } else if (idx < inv_offset) { - av_log(s->avctx, AV_LOG_ERROR, - "XLL: Invalid channel set inverse downmix code %x\n", code); - return -1; - } else { - return (ff_dca_inv_dmixtable[idx - inv_offset] ^ sign) - sign; - } -} - -static int32_t dca_get_dmix_coeff(DCAContext *s) -{ - return get_dmix_coeff(s, 0); -} - -static int32_t dca_get_inv_dmix_coeff(DCAContext *s) -{ - return get_dmix_coeff(s, 1); -} - -/* parse XLL header */ -int ff_dca_xll_decode_header(DCAContext *s) -{ - int hdr_pos, hdr_size; - av_unused int version, frame_size; - int i, chset_index; - - /* get bit position of sync header */ - hdr_pos = get_bits_count(&s->gb) - 32; - - version = get_bits(&s->gb, 4) + 1; - hdr_size = get_bits(&s->gb, 8) + 1; - - frame_size = get_bits_long(&s->gb, get_bits(&s->gb, 5) + 1) + 1; - - s->xll_channels = - s->xll_residual_channels = 0; - s->xll_nch_sets = get_bits(&s->gb, 4) + 1; - s->xll_segments = 1 << get_bits(&s->gb, 4); - s->xll_log_smpl_in_seg = get_bits(&s->gb, 4); - s->xll_smpl_in_seg = 1 << s->xll_log_smpl_in_seg; - s->xll_bits4seg_size = get_bits(&s->gb, 5) + 1; - s->xll_banddata_crc = get_bits(&s->gb, 2); - s->xll_scalable_lsb = get_bits1(&s->gb); - s->xll_bits4ch_mask = get_bits(&s->gb, 5) + 1; - - if (s->xll_scalable_lsb) { - s->xll_fixed_lsb_width = get_bits(&s->gb, 4); - if (s->xll_fixed_lsb_width) - av_log(s->avctx, AV_LOG_WARNING, - "XLL: fixed lsb width = %d, non-zero not supported.\n", - s->xll_fixed_lsb_width); - } - /* skip to the end of the common header */ - i = get_bits_count(&s->gb); - if (hdr_pos + hdr_size * 8 > i) - skip_bits_long(&s->gb, hdr_pos + hdr_size * 8 - i); - - for (chset_index = 0; chset_index < s->xll_nch_sets; chset_index++) { - XllChSetSubHeader *chset = &s->xll_chsets[chset_index]; - hdr_pos = get_bits_count(&s->gb); - hdr_size = get_bits(&s->gb, 10) + 1; - - chset->channels = get_bits(&s->gb, 4) + 1; - chset->residual_encode = get_bits(&s->gb, chset->channels); - chset->bit_resolution = get_bits(&s->gb, 5) + 1; - chset->bit_width = get_bits(&s->gb, 5) + 1; - chset->sampling_frequency = ff_dca_sampling_freqs[get_bits(&s->gb, 4)]; - chset->samp_freq_interp = get_bits(&s->gb, 2); - chset->replacement_set = get_bits(&s->gb, 2); - if (chset->replacement_set) - chset->active_replace_set = get_bits(&s->gb, 1); - - if (s->one2one_map_chtospkr) { - chset->primary_ch_set = get_bits(&s->gb, 1); - chset->downmix_coeff_code_embedded = get_bits(&s->gb, 1); - if (chset->downmix_coeff_code_embedded) { - chset->downmix_embedded = get_bits(&s->gb, 1); - if (chset->primary_ch_set) { - chset->downmix_type = get_bits(&s->gb, 3); - if (chset->downmix_type > 6) { - av_log(s->avctx, AV_LOG_ERROR, - "XLL: Invalid channel set downmix type\n"); - return AVERROR_INVALIDDATA; - } - } - } - chset->hier_chset = get_bits(&s->gb, 1); - - if (chset->downmix_coeff_code_embedded) { - /* nDownmixCoeffs is specified as N * M. For a primary - * channel set, it appears that N = number of - * channels, and M is the number of downmix channels. - * - * For a non-primary channel set, N is specified as - * number of channels + 1, and M is derived from the - * channel set hierarchy, and at least in simple cases - * M is the number of channels in preceding channel - * sets. */ - if (chset->primary_ch_set) { - static const char dmix_table[7] = { 1, 2, 2, 3, 3, 4, 4 }; - chset->downmix_ncoeffs = chset->channels * dmix_table[chset->downmix_type]; - } else - chset->downmix_ncoeffs = (chset->channels + 1) * s->xll_channels; - - if (chset->downmix_ncoeffs > DCA_XLL_DMIX_NCOEFFS_MAX) { - avpriv_request_sample(s->avctx, - "XLL: More than %d downmix coefficients", - DCA_XLL_DMIX_NCOEFFS_MAX); - return AVERROR_PATCHWELCOME; - } else if (chset->primary_ch_set) { - for (i = 0; i < chset->downmix_ncoeffs; i++) - if ((chset->downmix_coeffs[i] = dca_get_dmix_coeff(s)) == -1) - return AVERROR_INVALIDDATA; - } else { - unsigned c, r; - for (c = 0, i = 0; c < s->xll_channels; c++, i += chset->channels + 1) { - if ((chset->downmix_coeffs[i] = dca_get_inv_dmix_coeff(s)) == -1) - return AVERROR_INVALIDDATA; - for (r = 1; r <= chset->channels; r++) { - int32_t coeff = dca_get_dmix_coeff(s); - if (coeff == -1) - return AVERROR_INVALIDDATA; - chset->downmix_coeffs[i + r] = - (chset->downmix_coeffs[i] * (int64_t) coeff + (1 << 15)) >> 16; - } - } - } - } - chset->ch_mask_enabled = get_bits(&s->gb, 1); - if (chset->ch_mask_enabled) - chset->ch_mask = get_bits(&s->gb, s->xll_bits4ch_mask); - else - /* Skip speaker configuration bits */ - skip_bits_long(&s->gb, 25 * chset->channels); - } else { - chset->primary_ch_set = 1; - chset->downmix_coeff_code_embedded = 0; - /* Spec: NumChHierChSet = 0, NumDwnMixCodeCoeffs = 0, whatever that means. */ - chset->mapping_coeffs_present = get_bits(&s->gb, 1); - if (chset->mapping_coeffs_present) { - avpriv_report_missing_feature(s->avctx, "XLL: mapping coefficients"); - return AVERROR_PATCHWELCOME; - } - } - if (chset->sampling_frequency > 96000) - chset->num_freq_bands = 2 * (1 + get_bits(&s->gb, 1)); - else - chset->num_freq_bands = 1; - - if (chset->num_freq_bands > 1) { - avpriv_report_missing_feature(s->avctx, "XLL: num_freq_bands > 1"); - return AVERROR_PATCHWELCOME; - } - - if (get_bits(&s->gb, 1)) { /* pw_ch_decor_enabled */ - int bits = av_ceil_log2(chset->channels); - for (i = 0; i < chset->channels; i++) { - unsigned j = get_bits(&s->gb, bits); - if (j >= chset->channels) { - av_log(s->avctx, AV_LOG_ERROR, - "Original channel order value %u too large, only %d channels.\n", - j, chset->channels); - return AVERROR_INVALIDDATA; - } - chset->orig_chan_order[0][i] = j; - chset->orig_chan_order_inv[0][j] = i; - } - for (i = 0; i < chset->channels / 2; i++) { - if (get_bits(&s->gb, 1)) /* bChPFlag */ - chset->pw_ch_pairs_coeffs[0][i] = get_bits_sm(&s->gb, 7); - else - chset->pw_ch_pairs_coeffs[0][i] = 0; - } - } else { - for (i = 0; i < chset->channels; i++) - chset->orig_chan_order[0][i] = - chset->orig_chan_order_inv[0][i] = i; - for (i = 0; i < chset->channels / 2; i++) - chset->pw_ch_pairs_coeffs[0][i] = 0; - } - /* Adaptive prediction order */ - chset->adapt_order_max[0] = 0; - for (i = 0; i < chset->channels; i++) { - chset->adapt_order[0][i] = get_bits(&s->gb, 4); - if (chset->adapt_order_max[0] < chset->adapt_order[0][i]) - chset->adapt_order_max[0] = chset->adapt_order[0][i]; - } - /* Fixed prediction order, used in case the adaptive order - * above is zero */ - for (i = 0; i < chset->channels; i++) - chset->fixed_order[0][i] = - chset->adapt_order[0][i] ? 0 : get_bits(&s->gb, 2); - - for (i = 0; i < chset->channels; i++) { - unsigned j; - for (j = 0; j < chset->adapt_order[0][i]; j++) - chset->lpc_refl_coeffs_q_ind[0][i][j] = get_bits(&s->gb, 8); - } - - if (s->xll_scalable_lsb) { - chset->lsb_fsize[0] = get_bits(&s->gb, s->xll_bits4seg_size); - - for (i = 0; i < chset->channels; i++) - chset->scalable_lsbs[0][i] = get_bits(&s->gb, 4); - for (i = 0; i < chset->channels; i++) - chset->bit_width_adj_per_ch[0][i] = get_bits(&s->gb, 4); - } else { - memset(chset->scalable_lsbs[0], 0, - chset->channels * sizeof(chset->scalable_lsbs[0][0])); - memset(chset->bit_width_adj_per_ch[0], 0, - chset->channels * sizeof(chset->bit_width_adj_per_ch[0][0])); - } - - s->xll_channels += chset->channels; - s->xll_residual_channels += chset->channels - - av_popcount(chset->residual_encode); - - /* FIXME: Parse header data for extra frequency bands. */ - - /* Skip to end of channel set sub header. */ - i = get_bits_count(&s->gb); - if (hdr_pos + 8 * hdr_size < i) { - av_log(s->avctx, AV_LOG_ERROR, - "chset header too large, %d bits, should be <= %d bits\n", - i - hdr_pos, 8 * hdr_size); - return AVERROR_INVALIDDATA; - } - if (hdr_pos + 8 * hdr_size > i) - skip_bits_long(&s->gb, hdr_pos + 8 * hdr_size - i); - } - return 0; -} - -/* parse XLL navigation table */ -int ff_dca_xll_decode_navi(DCAContext *s, int asset_end) -{ - int nbands, band, chset, seg, data_start; - - /* FIXME: Supports only a single frequency band */ - nbands = 1; - - for (band = 0; band < nbands; band++) { - s->xll_navi.band_size[band] = 0; - for (seg = 0; seg < s->xll_segments; seg++) { - /* Note: The spec, ETSI TS 102 114 V1.4.1 (2012-09), says - * we should read a base value for segment_size from the - * stream, before reading the sizes of the channel sets. - * But that's apparently incorrect. */ - s->xll_navi.segment_size[band][seg] = 0; - - for (chset = 0; chset < s->xll_nch_sets; chset++) - if (band < s->xll_chsets[chset].num_freq_bands) { - s->xll_navi.chset_size[band][seg][chset] = - get_bits(&s->gb, s->xll_bits4seg_size) + 1; - s->xll_navi.segment_size[band][seg] += - s->xll_navi.chset_size[band][seg][chset]; - } - s->xll_navi.band_size[band] += s->xll_navi.segment_size[band][seg]; - } - } - /* Align to 8 bits and skip 16-bit CRC. */ - skip_bits_long(&s->gb, 16 + ((-get_bits_count(&s->gb)) & 7)); - - data_start = get_bits_count(&s->gb); - if (data_start + 8 * s->xll_navi.band_size[0] > asset_end) { - av_log(s->avctx, AV_LOG_ERROR, - "XLL: Data in NAVI table exceeds containing asset\n" - "start: %d (bit), size %u (bytes), end %d (bit), error %u\n", - data_start, s->xll_navi.band_size[0], asset_end, - data_start + 8 * s->xll_navi.band_size[0] - asset_end); - return AVERROR_INVALIDDATA; - } - init_get_bits(&s->xll_navi.gb, s->gb.buffer + data_start / 8, - 8 * s->xll_navi.band_size[0]); - return 0; -} - -static void dca_xll_inv_adapt_pred(int *samples, int nsamples, unsigned order, - const int *prev, const uint8_t *q_ind) -{ - static const uint16_t table[0x81] = { - 0, 3070, 5110, 7140, 9156, 11154, 13132, 15085, - 17010, 18904, 20764, 22588, 24373, 26117, 27818, 29474, - 31085, 32648, 34164, 35631, 37049, 38418, 39738, 41008, - 42230, 43404, 44530, 45609, 46642, 47630, 48575, 49477, - 50337, 51157, 51937, 52681, 53387, 54059, 54697, 55302, - 55876, 56421, 56937, 57426, 57888, 58326, 58741, 59132, - 59502, 59852, 60182, 60494, 60789, 61066, 61328, 61576, - 61809, 62029, 62236, 62431, 62615, 62788, 62951, 63105, - 63250, 63386, 63514, 63635, 63749, 63855, 63956, 64051, - 64140, 64224, 64302, 64376, 64446, 64512, 64573, 64631, - 64686, 64737, 64785, 64830, 64873, 64913, 64950, 64986, - 65019, 65050, 65079, 65107, 65133, 65157, 65180, 65202, - 65222, 65241, 65259, 65275, 65291, 65306, 65320, 65333, - 65345, 65357, 65368, 65378, 65387, 65396, 65405, 65413, - 65420, 65427, 65434, 65440, 65446, 65451, 65456, 65461, - 65466, 65470, 65474, 65478, 65481, 65485, 65488, 65491, - 65535, /* Final value is for the -128 corner case, see below. */ - }; - int c[DCA_XLL_AORDER_MAX]; - int64_t s; - unsigned i, j; - - for (i = 0; i < order; i++) { - if (q_ind[i] & 1) - /* The index value 0xff corresponds to a lookup of entry 0x80 in - * the table, and no value is provided in the specification. */ - c[i] = -table[(q_ind[i] >> 1) + 1]; - else - c[i] = table[q_ind[i] >> 1]; - } - /* The description in the spec is a bit convoluted. We can convert - * the reflected values to direct values in place, using a - * sequence of reflections operating on two values. */ - for (i = 1; i < order; i++) { - /* i = 1: scale c[0] - * i = 2: reflect c[0] <-> c[1] - * i = 3: scale c[1], reflect c[0] <-> c[2] - * i = 4: reflect c[0] <-> c[3] reflect c[1] <-> c[2] - * ... */ - if (i & 1) - c[i / 2] += ((int64_t) c[i] * c[i / 2] + 0x8000) >> 16; - for (j = 0; j < i / 2; j++) { - int r0 = c[j]; - int r1 = c[i - j - 1]; - c[j] += ((int64_t) c[i] * r1 + 0x8000) >> 16; - c[i - j - 1] += ((int64_t) c[i] * r0 + 0x8000) >> 16; - } - } - /* Apply predictor. */ - /* NOTE: Processing samples in this order means that the - * predictor is applied to the newly reconstructed samples. */ - if (prev) { - for (i = 0; i < order; i++) { - for (j = s = 0; j < i; j++) - s += (int64_t) c[j] * samples[i - 1 - j]; - for (; j < order; j++) - s += (int64_t) c[j] * prev[DCA_XLL_AORDER_MAX + i - 1 - j]; - - samples[i] -= av_clip_intp2((s + 0x8000) >> 16, 24); - } - } - 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_intp2((s + 0x8000) >> 16, 24); - } -} - -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; -} |