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Diffstat (limited to 'plugins/wma/libwma/wmadec.h')
| -rw-r--r-- | plugins/wma/libwma/wmadec.h | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/plugins/wma/libwma/wmadec.h b/plugins/wma/libwma/wmadec.h new file mode 100644 index 00000000..f5a773b0 --- /dev/null +++ b/plugins/wma/libwma/wmadec.h @@ -0,0 +1,197 @@ +/* + * WMA compatible decoder + * Copyright (c) 2002 The FFmpeg Project. + * + * This library 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 of the License, or (at your option) any later version. + * + * This library 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 this library; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#ifndef _WMADEC_H +#define _WMADEC_H + +#include <libasf/asf.h> +#include "ffmpeg_get_bits.h" +#include "types.h" + +//#define TRACE +/* size of blocks */ +#define BLOCK_MIN_BITS 7 +#define BLOCK_MAX_BITS 11 +#define BLOCK_MAX_SIZE (1 << BLOCK_MAX_BITS) + +#define BLOCK_NB_SIZES (BLOCK_MAX_BITS - BLOCK_MIN_BITS + 1) + +/* XXX: find exact max size */ +#define HIGH_BAND_MAX_SIZE 16 + +#define NB_LSP_COEFS 10 + +/* XXX: is it a suitable value ? */ +#define MAX_CODED_SUPERFRAME_SIZE 16384 + +#define M_PI 3.14159265358979323846 + +#define M_PI_F 0x3243f // in fixed 32 format +#define TWO_M_PI_F 0x6487f //in fixed 32 + +#define MAX_CHANNELS 2 + +#define NOISE_TAB_SIZE 8192 + +#define LSP_POW_BITS 7 + + +#if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || (CONFIG_CPU == MCF5250) +/* PP5022/24 and MCF5250 have 128KB of IRAM. 80KB are allocated for codecs */ +#define IBSS_ATTR_WMA_LARGE_IRAM IBSS_ATTR +#define IBSS_ATTR_WMA_XL_IRAM +#define ICONST_ATTR_WMA_XL_IRAM + +#elif defined(CPU_S5L870X) +/* S5L870x has even more IRAM. Use it. */ +#define IBSS_ATTR_WMA_LARGE_IRAM IBSS_ATTR +#define IBSS_ATTR_WMA_XL_IRAM IBSS_ATTR +#define ICONST_ATTR_WMA_XL_IRAM ICONST_ATTR + +#else +/* other PP's and MCF5249 have 96KB of IRAM */ +#define IBSS_ATTR_WMA_LARGE_IRAM +#define IBSS_ATTR_WMA_XL_IRAM +#define ICONST_ATTR_WMA_XL_IRAM + +#endif + + +#define VLCBITS 7 /*7 is the lowest without glitching*/ +#define VLCMAX ((22+VLCBITS-1)/VLCBITS) + +#define EXPVLCBITS 7 +#define EXPMAX ((19+EXPVLCBITS-1)/EXPVLCBITS) + +#define HGAINVLCBITS 9 +#define HGAINMAX ((13+HGAINVLCBITS-1)/HGAINVLCBITS) + + +typedef struct CoefVLCTable +{ + int n; /* total number of codes */ + const uint32_t *huffcodes; /* VLC bit values */ + const uint8_t *huffbits; /* VLC bit size */ + const uint16_t *levels; /* table to build run/level tables */ +} +CoefVLCTable; + +/* Define MEM_ALIGN_ATTR which may be used to align e.g. buffers for faster + * access. */ +#if defined(CPU_ARM) + /* Use ARMs cache alignment. */ + #define MEM_ALIGN_ATTR CACHEALIGN_ATTR + #define MEM_ALIGN_SIZE CACHEALIGN_SIZE +#elif defined(CPU_COLDFIRE) + /* Use fixed alignment of 16 bytes. Speed up only for 'movem' in DRAM. */ + #define MEM_ALIGN_ATTR __attribute__((aligned(16))) + #define MEM_ALIGN_SIZE 16 +#else + /* Align pointer size */ + #define MEM_ALIGN_ATTR __attribute__((aligned(sizeof(intptr_t)))) + #define MEM_ALIGN_SIZE sizeof(intptr_t) +#endif + +typedef struct WMADecodeContext +{ + GetBitContext gb; + + int nb_block_sizes; /* number of block sizes */ + + int sample_rate; + int nb_channels; + int bit_rate; + int version; /* 1 = 0x160 (WMAV1), 2 = 0x161 (WMAV2) */ + int block_align; + int use_bit_reservoir; + int use_variable_block_len; + int use_exp_vlc; /* exponent coding: 0 = lsp, 1 = vlc + delta */ + int use_noise_coding; /* true if perceptual noise is added */ + int byte_offset_bits; + VLC exp_vlc; + int exponent_sizes[BLOCK_NB_SIZES]; + uint16_t exponent_bands[BLOCK_NB_SIZES][25]; + int high_band_start[BLOCK_NB_SIZES]; /* index of first coef in high band */ + int coefs_start; /* first coded coef */ + int coefs_end[BLOCK_NB_SIZES]; /* max number of coded coefficients */ + int exponent_high_sizes[BLOCK_NB_SIZES]; + int exponent_high_bands[BLOCK_NB_SIZES][HIGH_BAND_MAX_SIZE]; + VLC hgain_vlc; + + /* coded values in high bands */ + int high_band_coded[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]; + int high_band_values[MAX_CHANNELS][HIGH_BAND_MAX_SIZE]; + + /* there are two possible tables for spectral coefficients */ + VLC coef_vlc[2]; + uint16_t *run_table[2]; + uint16_t *level_table[2]; + /* frame info */ + int frame_len; /* frame length in samples */ + int frame_len_bits; /* frame_len = 1 << frame_len_bits */ + + /* block info */ + int reset_block_lengths; + int block_len_bits; /* log2 of current block length */ + int next_block_len_bits; /* log2 of next block length */ + int prev_block_len_bits; /* log2 of prev block length */ + int block_len; /* block length in samples */ + int block_num; /* block number in current frame */ + int block_pos; /* current position in frame */ + uint8_t ms_stereo; /* true if mid/side stereo mode */ + uint8_t channel_coded[MAX_CHANNELS]; /* true if channel is coded */ + int exponents_bsize[MAX_CHANNELS]; // log2 ratio frame/exp. length + fixed32 exponents[MAX_CHANNELS][BLOCK_MAX_SIZE] MEM_ALIGN_ATTR; + fixed32 max_exponent[MAX_CHANNELS]; + int16_t coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE]; + fixed32 coefs[MAX_CHANNELS][BLOCK_MAX_SIZE]; + fixed32 *windows[BLOCK_NB_SIZES]; + /* output buffer for one frame and the last for IMDCT windowing */ + fixed32 frame_out[MAX_CHANNELS][BLOCK_MAX_SIZE*2]; + + /* last frame info */ + uint8_t last_superframe[MAX_CODED_SUPERFRAME_SIZE + 4] MEM_ALIGN_ATTR; /* padding added */ + int last_bitoffset; + int last_superframe_len; + fixed32 *noise_table; + int noise_index; + fixed32 noise_mult; /* XXX: suppress that and integrate it in the noise array */ + /* lsp_to_curve tables */ + fixed32 lsp_cos_table[BLOCK_MAX_SIZE] MEM_ALIGN_ATTR; + void *lsp_pow_m_table1; + void *lsp_pow_m_table2; + + /* State of current superframe decoding */ + int bit_offset; + int nb_frames; + int current_frame; + +#ifdef TRACE + + int frame_count; +#endif +} +WMADecodeContext; + +int wma_decode_init(WMADecodeContext* s, asf_waveformatex_t *wfx); +int wma_decode_superframe_init(WMADecodeContext* s, + const uint8_t *buf, int buf_size); +int wma_decode_superframe_frame(WMADecodeContext* s, + const uint8_t *buf, int buf_size); +#endif |