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author | Sean Bartell <wingedtachikoma@gmail.com> | 2011-06-25 21:32:25 -0400 |
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committer | Nils Wallménius <nils@rockbox.org> | 2012-04-25 22:13:20 +0200 |
commit | f40bfc9267b13b54e6379dfe7539447662879d24 (patch) | |
tree | 9b20069d5e62809ff434061ad730096836f916f2 /lib/rbcodec/codecs/libwma/wmadec.h | |
parent | a0009907de7a0107d49040d8a180f140e2eff299 (diff) | |
download | rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.tar.gz rockbox-f40bfc9267b13b54e6379dfe7539447662879d24.zip |
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
Diffstat (limited to 'lib/rbcodec/codecs/libwma/wmadec.h')
-rw-r--r-- | lib/rbcodec/codecs/libwma/wmadec.h | 181 |
1 files changed, 181 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libwma/wmadec.h b/lib/rbcodec/codecs/libwma/wmadec.h new file mode 100644 index 0000000000..76429dede1 --- /dev/null +++ b/lib/rbcodec/codecs/libwma/wmadec.h | |||
@@ -0,0 +1,181 @@ | |||
1 | /* | ||
2 | * WMA compatible decoder | ||
3 | * Copyright (c) 2002 The FFmpeg Project. | ||
4 | * | ||
5 | * This library is free software; you can redistribute it and/or | ||
6 | * modify it under the terms of the GNU Lesser General Public | ||
7 | * License as published by the Free Software Foundation; either | ||
8 | * version 2 of the License, or (at your option) any later version. | ||
9 | * | ||
10 | * This library is distributed in the hope that it will be useful, | ||
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | * Lesser General Public License for more details. | ||
14 | * | ||
15 | * You should have received a copy of the GNU Lesser General Public | ||
16 | * License along with this library; if not, write to the Free Software | ||
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
18 | */ | ||
19 | |||
20 | #ifndef _WMADEC_H | ||
21 | #define _WMADEC_H | ||
22 | |||
23 | #include <codecs/libasf/asf.h> | ||
24 | #include "ffmpeg_get_bits.h" | ||
25 | #include "types.h" | ||
26 | |||
27 | //#define TRACE | ||
28 | /* size of blocks */ | ||
29 | #define BLOCK_MIN_BITS 7 | ||
30 | #define BLOCK_MAX_BITS 11 | ||
31 | #define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS) | ||
32 | |||
33 | #define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1) | ||
34 | |||
35 | /* XXX: find exact max size */ | ||
36 | #define HIGH_BAND_MAX_SIZE 16 | ||
37 | |||
38 | #define NB_LSP_COEFS 10 | ||
39 | |||
40 | /* XXX: is it a suitable value ? */ | ||
41 | #define MAX_CODED_SUPERFRAME_SIZE 16384 | ||
42 | |||
43 | #define M_PI 3.14159265358979323846 | ||
44 | |||
45 | #define M_PI_F 0x3243f // in fixed 32 format | ||
46 | #define TWO_M_PI_F 0x6487f //in fixed 32 | ||
47 | |||
48 | #define MAX_CHANNELS 2 | ||
49 | |||
50 | #define NOISE_TAB_SIZE 8192 | ||
51 | |||
52 | #define LSP_POW_BITS 7 | ||
53 | |||
54 | |||
55 | #if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == MCF5250) | ||
56 | /* PP5022/24 and MCF5250 have 128KB of IRAM. 80KB are allocated for codecs */ | ||
57 | #define IBSS_ATTR_WMA_LARGE_IRAM IBSS_ATTR | ||
58 | #define IBSS_ATTR_WMA_XL_IRAM | ||
59 | #define ICONST_ATTR_WMA_XL_IRAM | ||
60 | |||
61 | #elif defined(CPU_S5L870X) | ||
62 | /* S5L870x has even more IRAM. Use it. */ | ||
63 | #define IBSS_ATTR_WMA_LARGE_IRAM IBSS_ATTR | ||
64 | #define IBSS_ATTR_WMA_XL_IRAM IBSS_ATTR | ||
65 | #define ICONST_ATTR_WMA_XL_IRAM ICONST_ATTR | ||
66 | |||
67 | #else | ||
68 | /* other PP's and MCF5249 have 96KB of IRAM */ | ||
69 | #define IBSS_ATTR_WMA_LARGE_IRAM | ||
70 | #define IBSS_ATTR_WMA_XL_IRAM | ||
71 | #define ICONST_ATTR_WMA_XL_IRAM | ||
72 | |||
73 | #endif | ||
74 | |||
75 | |||
76 | #define VLCBITS 7 /*7 is the lowest without glitching*/ | ||
77 | #define VLCMAX ((22+VLCBITS-1)/VLCBITS) | ||
78 | |||
79 | #define EXPVLCBITS 7 | ||
80 | #define EXPMAX ((19+EXPVLCBITS-1)/EXPVLCBITS) | ||
81 | |||
82 | #define HGAINVLCBITS 9 | ||
83 | #define HGAINMAX ((13+HGAINVLCBITS-1)/HGAINVLCBITS) | ||
84 | |||
85 | |||
86 | typedef struct CoefVLCTable | ||
87 | { | ||
88 | int n; /* total number of codes */ | ||
89 | const uint32_t *huffcodes; /* VLC bit values */ | ||
90 | const uint8_t *huffbits; /* VLC bit size */ | ||
91 | const uint16_t *levels; /* table to build run/level tables */ | ||
92 | } | ||
93 | CoefVLCTable; | ||
94 | |||
95 | typedef struct WMADecodeContext | ||
96 | { | ||
97 | GetBitContext gb; | ||
98 | |||
99 | int nb_block_sizes; /* number of block sizes */ | ||
100 | |||
101 | int sample_rate; | ||
102 | int nb_channels; | ||
103 | int bit_rate; | ||
104 | int version; /* 1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2) */ | ||
105 | int block_align; | ||
106 | int use_bit_reservoir; | ||
107 | int use_variable_block_len; | ||
108 | int use_exp_vlc; /* exponent coding: 0 = lsp, 1 = vlc + delta */ | ||
109 | int use_noise_coding; /* true if perceptual noise is added */ | ||
110 | int byte_offset_bits; | ||
111 | VLC exp_vlc; | ||
112 | int exponent_sizes[BLOCK_NB_SIZES]; | ||
113 | uint16_t exponent_bands[BLOCK_NB_SIZES][25]; | ||
114 | int high_band_start[BLOCK_NB_SIZES]; /* index of first coef in high band */ | ||
115 | int coefs_start; /* first coded coef */ | ||
116 | int coefs_end[BLOCK_NB_SIZES]; /* max number of coded coefficients */ | ||
117 | int exponent_high_sizes[BLOCK_NB_SIZES]; | ||
118 | int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]; | ||
119 | VLC hgain_vlc; | ||
120 | |||
121 | /* coded values in high bands */ | ||
122 | int high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]; | ||
123 | int high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]; | ||
124 | |||
125 | /* there are two possible tables for spectral coefficients */ | ||
126 | VLC coef_vlc[2]; | ||
127 | uint16_t *run_table[2]; | ||
128 | uint16_t *level_table[2]; | ||
129 | /* frame info */ | ||
130 | int frame_len; /* frame length in samples */ | ||
131 | int frame_len_bits; /* frame_len = 1 << frame_len_bits */ | ||
132 | |||
133 | /* block info */ | ||
134 | int reset_block_lengths; | ||
135 | int block_len_bits; /* log2 of current block length */ | ||
136 | int next_block_len_bits; /* log2 of next block length */ | ||
137 | int prev_block_len_bits; /* log2 of prev block length */ | ||
138 | int block_len; /* block length in samples */ | ||
139 | int block_num; /* block number in current frame */ | ||
140 | int block_pos; /* current position in frame */ | ||
141 | uint8_t ms_stereo; /* true if mid/side stereo mode */ | ||
142 | uint8_t channel_coded[MAX_CHANNELS]; /* true if channel is coded */ | ||
143 | int exponents_bsize[MAX_CHANNELS]; // log2 ratio frame/exp. length | ||
144 | fixed32 exponents[MAX_CHANNELS][BLOCK_MAX_SIZE] MEM_ALIGN_ATTR; | ||
145 | fixed32 max_exponent[MAX_CHANNELS]; | ||
146 | int16_t coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE]; | ||
147 | fixed32 (*coefs)[MAX_CHANNELS][BLOCK_MAX_SIZE]; | ||
148 | fixed32 *windows[BLOCK_NB_SIZES]; | ||
149 | /* output buffer for one frame and the last for IMDCT windowing */ | ||
150 | fixed32 (*frame_out)[MAX_CHANNELS][BLOCK_MAX_SIZE*2]; | ||
151 | |||
152 | /* last frame info */ | ||
153 | uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + 4] MEM_ALIGN_ATTR; /* padding added */ | ||
154 | int last_bitoffset; | ||
155 | int last_superframe_len; | ||
156 | fixed32 *noise_table; | ||
157 | int noise_index; | ||
158 | fixed32 noise_mult; /* XXX: suppress that and integrate it in the noise array */ | ||
159 | /* lsp_to_curve tables */ | ||
160 | fixed32 lsp_cos_table[BLOCK_MAX_SIZE] MEM_ALIGN_ATTR; | ||
161 | void *lsp_pow_m_table1; | ||
162 | void *lsp_pow_m_table2; | ||
163 | |||
164 | /* State of current superframe decoding */ | ||
165 | int bit_offset; | ||
166 | int nb_frames; | ||
167 | int current_frame; | ||
168 | |||
169 | #ifdef TRACE | ||
170 | |||
171 | int frame_count; | ||
172 | #endif | ||
173 | } | ||
174 | WMADecodeContext; | ||
175 | |||
176 | int wma_decode_init(WMADecodeContext* s, asf_waveformatex_t *wfx); | ||
177 | int wma_decode_superframe_init(WMADecodeContext* s, | ||
178 | const uint8_t *buf, int buf_size); | ||
179 | int wma_decode_superframe_frame(WMADecodeContext* s, | ||
180 | const uint8_t *buf, int buf_size); | ||
181 | #endif | ||