blob: b649dfd7ee7066034e770b81091e346e3e3e79de
| 1 | /* |
| 2 | * AAC Spectral Band Replication decoding functions |
| 3 | * Copyright (c) 2008-2009 Robert Swain ( rob opendot cl ) |
| 4 | * Copyright (c) 2009-2010 Alex Converse <alex.converse@gmail.com> |
| 5 | * |
| 6 | * This file is part of FFmpeg. |
| 7 | * |
| 8 | * FFmpeg is free software; you can redistribute it and/or |
| 9 | * modify it under the terms of the GNU Lesser General Public |
| 10 | * License as published by the Free Software Foundation; either |
| 11 | * version 2.1 of the License, or (at your option) any later version. |
| 12 | * |
| 13 | * FFmpeg is distributed in the hope that it will be useful, |
| 14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 16 | * Lesser General Public License for more details. |
| 17 | * |
| 18 | * You should have received a copy of the GNU Lesser General Public |
| 19 | * License along with FFmpeg; if not, write to the Free Software |
| 20 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
| 21 | */ |
| 22 | |
| 23 | static void sbr_sum64x5_c(INTFLOAT *z) |
| 24 | { |
| 25 | int k; |
| 26 | for (k = 0; k < 64; k++) { |
| 27 | INTFLOAT f = z[k] + z[k + 64] + z[k + 128] + z[k + 192] + z[k + 256]; |
| 28 | z[k] = f; |
| 29 | } |
| 30 | } |
| 31 | |
| 32 | static void sbr_qmf_deint_bfly_c(INTFLOAT *v, const INTFLOAT *src0, const INTFLOAT *src1) |
| 33 | { |
| 34 | int i; |
| 35 | for (i = 0; i < 64; i++) { |
| 36 | v[ i] = AAC_SRA_R((src0[i] - src1[63 - i]), 5); |
| 37 | v[127 - i] = AAC_SRA_R((src0[i] + src1[63 - i]), 5); |
| 38 | } |
| 39 | } |
| 40 | |
| 41 | static void sbr_hf_apply_noise_0(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m, |
| 42 | const AAC_FLOAT *q_filt, int noise, |
| 43 | int kx, int m_max) |
| 44 | { |
| 45 | sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)1.0, (INTFLOAT)0.0, m_max); |
| 46 | } |
| 47 | |
| 48 | static void sbr_hf_apply_noise_1(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m, |
| 49 | const AAC_FLOAT *q_filt, int noise, |
| 50 | int kx, int m_max) |
| 51 | { |
| 52 | INTFLOAT phi_sign = 1 - 2 * (kx & 1); |
| 53 | sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)0.0, phi_sign, m_max); |
| 54 | } |
| 55 | |
| 56 | static void sbr_hf_apply_noise_2(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m, |
| 57 | const AAC_FLOAT *q_filt, int noise, |
| 58 | int kx, int m_max) |
| 59 | { |
| 60 | sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)-1.0, (INTFLOAT)0.0, m_max); |
| 61 | } |
| 62 | |
| 63 | static void sbr_hf_apply_noise_3(INTFLOAT (*Y)[2], const AAC_FLOAT *s_m, |
| 64 | const AAC_FLOAT *q_filt, int noise, |
| 65 | int kx, int m_max) |
| 66 | { |
| 67 | INTFLOAT phi_sign = 1 - 2 * (kx & 1); |
| 68 | sbr_hf_apply_noise(Y, s_m, q_filt, noise, (INTFLOAT)0.0, -phi_sign, m_max); |
| 69 | } |
| 70 | |
| 71 | av_cold void AAC_RENAME(ff_sbrdsp_init)(SBRDSPContext *s) |
| 72 | { |
| 73 | s->sum64x5 = sbr_sum64x5_c; |
| 74 | s->sum_square = sbr_sum_square_c; |
| 75 | s->neg_odd_64 = sbr_neg_odd_64_c; |
| 76 | s->qmf_pre_shuffle = sbr_qmf_pre_shuffle_c; |
| 77 | s->qmf_post_shuffle = sbr_qmf_post_shuffle_c; |
| 78 | s->qmf_deint_neg = sbr_qmf_deint_neg_c; |
| 79 | s->qmf_deint_bfly = sbr_qmf_deint_bfly_c; |
| 80 | s->autocorrelate = sbr_autocorrelate_c; |
| 81 | s->hf_gen = sbr_hf_gen_c; |
| 82 | s->hf_g_filt = sbr_hf_g_filt_c; |
| 83 | |
| 84 | s->hf_apply_noise[0] = sbr_hf_apply_noise_0; |
| 85 | s->hf_apply_noise[1] = sbr_hf_apply_noise_1; |
| 86 | s->hf_apply_noise[2] = sbr_hf_apply_noise_2; |
| 87 | s->hf_apply_noise[3] = sbr_hf_apply_noise_3; |
| 88 | |
| 89 | #if !USE_FIXED |
| 90 | if (ARCH_ARM) |
| 91 | ff_sbrdsp_init_arm(s); |
| 92 | if (ARCH_X86) |
| 93 | ff_sbrdsp_init_x86(s); |
| 94 | if (ARCH_MIPS) |
| 95 | ff_sbrdsp_init_mips(s); |
| 96 | #endif /* !USE_FIXED */ |
| 97 | } |
| 98 |