| Line | Branch | Exec | 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 | #define USE_FIXED 1 | ||
| 33 | |||
| 34 | #include "libavutil/thread.h" | ||
| 35 | |||
| 36 | #include "libavcodec/aac_defines.h" | ||
| 37 | |||
| 38 | #include "libavcodec/avcodec.h" | ||
| 39 | #include "aacdec.h" | ||
| 40 | #include "libavcodec/aactab.h" | ||
| 41 | #include "libavcodec/sinewin_fixed_tablegen.h" | ||
| 42 | #include "libavcodec/kbdwin.h" | ||
| 43 | #include "libavcodec/cbrt_data.h" | ||
| 44 | #include "libavcodec/aacsbr.h" | ||
| 45 | |||
| 46 | DECLARE_ALIGNED(32, static int, aac_kbd_long_1024_fixed)[1024]; | ||
| 47 | DECLARE_ALIGNED(32, static int, aac_kbd_short_128_fixed)[128]; | ||
| 48 | DECLARE_ALIGNED(32, static int, aac_kbd_long_960_fixed)[960]; | ||
| 49 | DECLARE_ALIGNED(32, static int, aac_kbd_short_120_fixed)[120]; | ||
| 50 | DECLARE_ALIGNED(32, static int, aac_kbd_long_768_fixed)[768]; | ||
| 51 | DECLARE_ALIGNED(32, static int, aac_kbd_short_96_fixed)[96]; | ||
| 52 | |||
| 53 | 18 | static void init_tables_fixed_fn(void) | |
| 54 | { | ||
| 55 | 18 | ff_cbrt_tableinit_fixed(); | |
| 56 | |||
| 57 | 18 | ff_kbd_window_init_fixed(aac_kbd_long_1024_fixed, 4.0, 1024); | |
| 58 | 18 | ff_kbd_window_init_fixed(aac_kbd_short_128_fixed, 6.0, 128); | |
| 59 | |||
| 60 | 18 | ff_kbd_window_init_fixed(aac_kbd_long_960_fixed, 4.0, 960); | |
| 61 | 18 | ff_kbd_window_init_fixed(aac_kbd_short_120_fixed, 6.0, 120); | |
| 62 | |||
| 63 | 18 | ff_aac_sbr_init_fixed(); | |
| 64 | |||
| 65 | 18 | init_sine_windows_fixed(); | |
| 66 | 18 | } | |
| 67 | |||
| 68 | static const int cce_scale_fixed[8] = { | ||
| 69 | Q30(1.0), //2^(0/8) | ||
| 70 | Q30(1.0905077327), //2^(1/8) | ||
| 71 | Q30(1.1892071150), //2^(2/8) | ||
| 72 | Q30(1.2968395547), //2^(3/8) | ||
| 73 | Q30(1.4142135624), //2^(4/8) | ||
| 74 | Q30(1.5422108254), //2^(5/8) | ||
| 75 | Q30(1.6817928305), //2^(6/8) | ||
| 76 | Q30(1.8340080864), //2^(7/8) | ||
| 77 | }; | ||
| 78 | |||
| 79 | /** Dequantization-related */ | ||
| 80 | #include "aacdec_fixed_dequant.h" | ||
| 81 | |||
| 82 | #include "aacdec_fixed_coupling.h" | ||
| 83 | #include "aacdec_fixed_prediction.h" | ||
| 84 | #include "aacdec_dsp_template.c" | ||
| 85 | #include "aacdec_proc_template.c" | ||
| 86 | |||
| 87 | 23 | av_cold int ff_aac_decode_init_fixed(AVCodecContext *avctx) | |
| 88 | { | ||
| 89 | static AVOnce init_fixed_once = AV_ONCE_INIT; | ||
| 90 | 23 | AACDecContext *ac = avctx->priv_data; | |
| 91 | |||
| 92 | 23 | ac->is_fixed = 1; | |
| 93 | 23 | avctx->sample_fmt = AV_SAMPLE_FMT_S32P; | |
| 94 | |||
| 95 | 23 | aac_dsp_init_fixed(&ac->dsp); | |
| 96 | 23 | aac_proc_init_fixed(&ac->proc); | |
| 97 | |||
| 98 | 23 | ac->fdsp = avpriv_alloc_fixed_dsp(avctx->flags & AV_CODEC_FLAG_BITEXACT); | |
| 99 |
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23 | if (!ac->fdsp) |
| 100 | ✗ | return AVERROR(ENOMEM); | |
| 101 | |||
| 102 | 23 | ff_thread_once(&init_fixed_once, init_tables_fixed_fn); | |
| 103 | |||
| 104 | 23 | return ff_aac_decode_init(avctx); | |
| 105 | } | ||
| 106 |