summaryrefslogtreecommitdiff
path: root/apps/codecs/libwmapro/wma.h
diff options
context:
space:
mode:
Diffstat (limited to 'apps/codecs/libwmapro/wma.h')
-rw-r--r--apps/codecs/libwmapro/wma.h163
1 files changed, 163 insertions, 0 deletions
diff --git a/apps/codecs/libwmapro/wma.h b/apps/codecs/libwmapro/wma.h
new file mode 100644
index 0000000000..11274ad970
--- /dev/null
+++ b/apps/codecs/libwmapro/wma.h
@@ -0,0 +1,163 @@
1/*
2 * WMA compatible codec
3 * Copyright (c) 2002-2007 The FFmpeg Project
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_WMA_H
23#define AVCODEC_WMA_H
24
25#include "get_bits.h"
26#include "put_bits.h"
27#include "dsputil.h"
28#include "fft.h"
29
30/* size of blocks */
31#define BLOCK_MIN_BITS 7
32#define BLOCK_MAX_BITS 11
33#define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS)
34
35#define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1)
36
37/* XXX: find exact max size */
38#define HIGH_BAND_MAX_SIZE 16
39
40#define NB_LSP_COEFS 10
41
42/* XXX: is it a suitable value ? */
43#define MAX_CODED_SUPERFRAME_SIZE 16384
44
45#define MAX_CHANNELS 2
46
47#define NOISE_TAB_SIZE 8192
48
49#define LSP_POW_BITS 7
50
51//FIXME should be in wmadec
52#define VLCBITS 9
53#define VLCMAX ((22+VLCBITS-1)/VLCBITS)
54
55typedef float WMACoef; ///< type for decoded coefficients, int16_t would be enough for wma 1/2
56
57typedef struct CoefVLCTable {
58 int n; ///< total number of codes
59 int max_level;
60 const uint32_t *huffcodes; ///< VLC bit values
61 const uint8_t *huffbits; ///< VLC bit size
62 const uint16_t *levels; ///< table to build run/level tables
63} CoefVLCTable;
64
65typedef struct WMACodecContext {
66 AVCodecContext* avctx;
67 GetBitContext gb;
68 PutBitContext pb;
69 int sample_rate;
70 int nb_channels;
71 int bit_rate;
72 int version; ///< 1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2)
73 int block_align;
74 int use_bit_reservoir;
75 int use_variable_block_len;
76 int use_exp_vlc; ///< exponent coding: 0 = lsp, 1 = vlc + delta
77 int use_noise_coding; ///< true if perceptual noise is added
78 int byte_offset_bits;
79 VLC exp_vlc;
80 int exponent_sizes[BLOCK_NB_SIZES];
81 uint16_t exponent_bands[BLOCK_NB_SIZES][25];
82 int high_band_start[BLOCK_NB_SIZES]; ///< index of first coef in high band
83 int coefs_start; ///< first coded coef
84 int coefs_end[BLOCK_NB_SIZES]; ///< max number of coded coefficients
85 int exponent_high_sizes[BLOCK_NB_SIZES];
86 int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE];
87 VLC hgain_vlc;
88
89 /* coded values in high bands */
90 int high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE];
91 int high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE];
92
93 /* there are two possible tables for spectral coefficients */
94//FIXME the following 3 tables should be shared between decoders
95 VLC coef_vlc[2];
96 uint16_t *run_table[2];
97 float *level_table[2];
98 uint16_t *int_table[2];
99 const CoefVLCTable *coef_vlcs[2];
100 /* frame info */
101 int frame_len; ///< frame length in samples
102 int frame_len_bits; ///< frame_len = 1 << frame_len_bits
103 int nb_block_sizes; ///< number of block sizes
104 /* block info */
105 int reset_block_lengths;
106 int block_len_bits; ///< log2 of current block length
107 int next_block_len_bits; ///< log2 of next block length
108 int prev_block_len_bits; ///< log2 of prev block length
109 int block_len; ///< block length in samples
110 int block_num; ///< block number in current frame
111 int block_pos; ///< current position in frame
112 uint8_t ms_stereo; ///< true if mid/side stereo mode
113 uint8_t channel_coded[MAX_CHANNELS]; ///< true if channel is coded
114 int exponents_bsize[MAX_CHANNELS]; ///< log2 ratio frame/exp. length
115 DECLARE_ALIGNED(16, float, exponents)[MAX_CHANNELS][BLOCK_MAX_SIZE];
116 float max_exponent[MAX_CHANNELS];
117 WMACoef coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE];
118 DECLARE_ALIGNED(16, float, coefs)[MAX_CHANNELS][BLOCK_MAX_SIZE];
119 DECLARE_ALIGNED(16, FFTSample, output)[BLOCK_MAX_SIZE * 2];
120 FFTContext mdct_ctx[BLOCK_NB_SIZES];
121 float *windows[BLOCK_NB_SIZES];
122 /* output buffer for one frame and the last for IMDCT windowing */
123 DECLARE_ALIGNED(16, float, frame_out)[MAX_CHANNELS][BLOCK_MAX_SIZE * 2];
124 /* last frame info */
125 uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + 4]; /* padding added */
126 int last_bitoffset;
127 int last_superframe_len;
128 float noise_table[NOISE_TAB_SIZE];
129 int noise_index;
130 float noise_mult; /* XXX: suppress that and integrate it in the noise array */
131 /* lsp_to_curve tables */
132 float lsp_cos_table[BLOCK_MAX_SIZE];
133 float lsp_pow_e_table[256];
134 float lsp_pow_m_table1[(1 << LSP_POW_BITS)];
135 float lsp_pow_m_table2[(1 << LSP_POW_BITS)];
136 DSPContext dsp;
137
138#ifdef TRACE
139 int frame_count;
140#endif
141} WMACodecContext;
142
143extern const uint16_t ff_wma_critical_freqs[25];
144extern const uint16_t ff_wma_hgain_huffcodes[37];
145extern const uint8_t ff_wma_hgain_huffbits[37];
146extern const float ff_wma_lsp_codebook[NB_LSP_COEFS][16];
147extern const uint32_t ff_aac_scalefactor_code[121];
148extern const uint8_t ff_aac_scalefactor_bits[121];
149
150int av_cold ff_wma_get_frame_len_bits(int sample_rate, int version,
151 unsigned int decode_flags);
152int ff_wma_init(AVCodecContext * avctx, int flags2);
153int ff_wma_total_gain_to_bits(int total_gain);
154int ff_wma_end(AVCodecContext *avctx);
155unsigned int ff_wma_get_large_val(GetBitContext* gb);
156int ff_wma_run_level_decode(AVCodecContext* avctx, GetBitContext* gb,
157 VLC *vlc,
158 const float *level_table, const uint16_t *run_table,
159 int version, WMACoef *ptr, int offset,
160 int num_coefs, int block_len, int frame_len_bits,
161 int coef_nb_bits);
162
163#endif /* AVCODEC_WMA_H */
generated by cgit v1.2.3 (git 2.39.1) at 2024-09-20 04:06:35 +0000