/src/ffmpeg/libavcodec/aac/aacdec_float_coupling.h
Line | Count | Source |
1 | | /* |
2 | | * AAC decoder |
3 | | * Copyright (c) 2005-2006 Oded Shimon ( ods15 ods15 dyndns org ) |
4 | | * Copyright (c) 2006-2007 Maxim Gavrilov ( maxim.gavrilov gmail com ) |
5 | | * Copyright (c) 2008-2013 Alex Converse <alex.converse@gmail.com> |
6 | | * |
7 | | * AAC LATM decoder |
8 | | * Copyright (c) 2008-2010 Paul Kendall <paul@kcbbs.gen.nz> |
9 | | * Copyright (c) 2010 Janne Grunau <janne-libav@jannau.net> |
10 | | * |
11 | | * AAC decoder fixed-point implementation |
12 | | * Copyright (c) 2013 |
13 | | * MIPS Technologies, Inc., California. |
14 | | * |
15 | | * This file is part of FFmpeg. |
16 | | * |
17 | | * FFmpeg is free software; you can redistribute it and/or |
18 | | * modify it under the terms of the GNU Lesser General Public |
19 | | * License as published by the Free Software Foundation; either |
20 | | * version 2.1 of the License, or (at your option) any later version. |
21 | | * |
22 | | * FFmpeg is distributed in the hope that it will be useful, |
23 | | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
24 | | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
25 | | * Lesser General Public License for more details. |
26 | | * |
27 | | * You should have received a copy of the GNU Lesser General Public |
28 | | * License along with FFmpeg; if not, write to the Free Software |
29 | | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
30 | | */ |
31 | | |
32 | | #ifndef AVCODEC_AAC_AACDEC_FLOAT_COUPLING_H |
33 | | #define AVCODEC_AAC_AACDEC_FLOAT_COUPLING_H |
34 | | |
35 | | #include "aacdec.h" |
36 | | |
37 | | /** |
38 | | * Apply dependent channel coupling (applied before IMDCT). |
39 | | * |
40 | | * @param index index into coupling gain array |
41 | | */ |
42 | | static void AAC_RENAME(apply_dependent_coupling)(AACDecContext *ac, |
43 | | SingleChannelElement *target, |
44 | | ChannelElement *cce, int index) |
45 | 373k | { |
46 | 373k | IndividualChannelStream *ics = &cce->ch[0].ics; |
47 | 373k | const uint16_t *offsets = ics->swb_offset; |
48 | 373k | float *dest = target->coeffs; |
49 | 373k | const float *src = cce->ch[0].coeffs; |
50 | 373k | int g, i, group, k, idx = 0; |
51 | 373k | if (ac->oc[1].m4ac.object_type == AOT_AAC_LTP) { |
52 | 52.0k | av_log(ac->avctx, AV_LOG_ERROR, |
53 | 52.0k | "Dependent coupling is not supported together with LTP\n"); |
54 | 52.0k | return; |
55 | 52.0k | } |
56 | 350k | for (g = 0; g < ics->num_window_groups; g++) { |
57 | 133k | for (i = 0; i < ics->max_sfb; i++, idx++) { |
58 | 104k | if (cce->ch[0].band_type[idx] != ZERO_BT) { |
59 | 43.8k | const float gain = cce->coup.gain[index][idx]; |
60 | 92.4k | for (group = 0; group < ics->group_len[g]; group++) { |
61 | 531k | for (k = offsets[i]; k < offsets[i + 1]; k++) { |
62 | | // FIXME: SIMDify |
63 | 482k | dest[group * 128 + k] += gain * src[group * 128 + k]; |
64 | 482k | } |
65 | 48.6k | } |
66 | 43.8k | } |
67 | 104k | } |
68 | 29.0k | dest += ics->group_len[g] * 128; |
69 | 29.0k | src += ics->group_len[g] * 128; |
70 | 29.0k | } |
71 | 321k | } |
72 | | |
73 | | /** |
74 | | * Apply independent channel coupling (applied after IMDCT). |
75 | | * |
76 | | * @param index index into coupling gain array |
77 | | */ |
78 | | static void AAC_RENAME(apply_independent_coupling)(AACDecContext *ac, |
79 | | SingleChannelElement *target, |
80 | | ChannelElement *cce, int index) |
81 | 22.9k | { |
82 | 22.9k | const float gain = cce->coup.gain[index][0]; |
83 | 22.9k | const float *src = cce->ch[0].output; |
84 | 22.9k | float *dest = target->output; |
85 | 22.9k | const int len = 1024 << (ac->oc[1].m4ac.sbr == 1); |
86 | | |
87 | 22.9k | ac->fdsp->vector_fmac_scalar(dest, src, gain, len); |
88 | 22.9k | } |
89 | | |
90 | | #endif /* AVCODEC_AAC_AACDEC_FLOAT_COUPLING_H */ |