From 10e26bc782b512e275fe860f2c8330b0b9277410 Mon Sep 17 00:00:00 2001 From: Benjamin Larsson Date: Tue, 17 Apr 2007 20:53:39 +0000 Subject: Atrac3 decoder. Originally committed as revision 8747 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/atrac3data.h | 133 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 133 insertions(+) create mode 100644 libavcodec/atrac3data.h (limited to 'libavcodec/atrac3data.h') diff --git a/libavcodec/atrac3data.h b/libavcodec/atrac3data.h new file mode 100644 index 0000000000..0017d60c06 --- /dev/null +++ b/libavcodec/atrac3data.h @@ -0,0 +1,133 @@ +/* + * Atrac 3 compatible decoder data + * Copyright (c) 2006-2007 Maxim Poliakovski + * Copyright (c) 2006-2007 Benjamin Larsson + * + * 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 + */ + +/** + * @file atrac3data.h + * Atrac 3 AKA RealAudio 8 compatible decoder data + */ + +/* VLC tables */ + +static const uint8_t huffcode1[9] = { + 0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F, +}; + +static const uint8_t huffbits1[9] = { + 1,3,3,4,4,5,5,5,5, +}; + +static const uint8_t huffcode2[5] = { + 0x0,0x4,0x5,0x6,0x7, +}; + +static const uint8_t huffbits2[5] = { + 1,3,3,3,3, +}; + +static const uint8_t huffcode3[7] = { +0x0,0x4,0x5,0xC,0xD,0xE,0xF, +}; + +static const uint8_t huffbits3[7] = { + 1,3,3,4,4,4,4, +}; + +static const uint8_t huffcode4[9] = { + 0x0,0x4,0x5,0xC,0xD,0x1C,0x1D,0x1E,0x1F, +}; + +static const uint8_t huffbits4[9] = { + 1,3,3,4,4,5,5,5,5, +}; + +static const uint8_t huffcode5[15] = { + 0x0,0x2,0x3,0x8,0x9,0xA,0xB,0x1C,0x1D,0x3C,0x3D,0x3E,0x3F,0xC,0xD, +}; + +static const uint8_t huffbits5[15] = { + 2,3,3,4,4,4,4,5,5,6,6,6,6,4,4 +}; + +static const uint8_t huffcode6[31] = { + 0x0,0x2,0x3,0x4,0x5,0x6,0x7,0x14,0x15,0x16,0x17,0x18,0x19,0x34,0x35, + 0x36,0x37,0x38,0x39,0x3A,0x3B,0x78,0x79,0x7A,0x7B,0x7C,0x7D,0x7E,0x7F,0x8,0x9, +}; + +static const uint8_t huffbits6[31] = { + 3,4,4,4,4,4,4,5,5,5,5,5,5,6,6,6,6,6,6,6,6,7,7,7,7,7,7,7,7,4,4 +}; + +static const uint8_t huffcode7[63] = { + 0x0,0x8,0x9,0xA,0xB,0xC,0xD,0xE,0xF,0x10,0x11,0x24,0x25,0x26,0x27,0x28, + 0x29,0x2A,0x2B,0x2C,0x2D,0x2E,0x2F,0x30,0x31,0x32,0x33,0x68,0x69,0x6A,0x6B,0x6C, + 0x6D,0x6E,0x6F,0x70,0x71,0x72,0x73,0x74,0x75,0xEC,0xED,0xEE,0xEF,0xF0,0xF1,0xF2, + 0xF3,0xF4,0xF5,0xF6,0xF7,0xF8,0xF9,0xFA,0xFB,0xFC,0xFD,0xFE,0xFF,0x2,0x3, +}; + +static const uint8_t huffbits7[63] = { + 3,5,5,5,5,5,5,5,5,5,5,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,6,7,7,7,7,7, + 7,7,7,7,7,7,7,7,7,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,8,4,4 +}; + +static const uint8_t huff_tab_sizes[7] = { + 9, 5, 7, 9, 15, 31, 63, +}; + +static const uint8_t* huff_codes[7] = { + huffcode1,huffcode2,huffcode3,huffcode4,huffcode5,huffcode6,huffcode7, +}; + +static const uint8_t* huff_bits[7] = { + huffbits1,huffbits2,huffbits3,huffbits4,huffbits5,huffbits6,huffbits7, +}; + +/* selector tables */ + +static const uint8_t CLCLengthTab[8] = {0, 4, 3, 3, 4, 4, 5, 6}; +static const int8_t seTab_0[4] = {0, 1, -2, -1}; +static const int8_t decTable1[18] = {0,0, 0,1, 0,-1, 1,0, -1,0, 1,1, 1,-1, -1,1, -1,-1}; + + +/* tables for the scalefactor decoding */ + +static const float iMaxQuant[8] = { + 0.0, 1.0/1.5, 1.0/2.5, 1.0/3.5, 1.0/4.5, 1.0/7.5, 1.0/15.5, 1.0/31.5 +}; + +static const uint16_t subbandTab[33] = { + 0, 8, 16, 24, 32, 40, 48, 56, 64, 80, 96, 112, 128, 144, 160, 176, 192, 224, + 256, 288, 320, 352, 384, 416, 448, 480, 512, 576, 640, 704, 768, 896, 1024 +}; + +/* transform data */ + +static const float qmf_48tap_half[24] = { + -0.00001461907, -0.00009205479, -0.000056157569, 0.00030117269, + 0.0002422519,-0.00085293897, -0.0005205574, 0.0020340169, + 0.00078333891, -0.0042153862, -0.00075614988, 0.0078402944, + -0.000061169922, -0.01344162, 0.0024626821, 0.021736089, + -0.007801671, -0.034090221, 0.01880949, 0.054326009, + -0.043596379, -0.099384367, 0.13207909, 0.46424159 +}; + +/* joint stereo related tables */ +static const float matrixCoeffs[8] = {0.0, 2.0, 2.0, 2.0, 0.0, 0.0, 1.0, 1.0}; -- cgit v1.2.3