1 files changed, 162 insertions, 0 deletions

diff --git a/apps/codecs/libwma/wmadec.h b/apps/codecs/libwma/wmadec.h
new file mode 100644
index 0000000000..89c100daba
--- /dev/null
+++ b/apps/codecs/libwma/wmadec.h
@@ -0,0 +1,162 @@
+#ifndef _WMADEC_H
+#define _WMADEC_H
+
+#include "asf.h"
+#include "common.h"  /* For GetBitContext */
+//#include "dsputil.h"  /* For MDCTContext */
+
+
+//#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
+
+#define VLC_TYPE int16_t
+
+typedef struct VLC
+{
+    int bits;
+    VLC_TYPE (*table)[2]; ///< code, bits
+    int table_size, table_allocated;
+}
+VLC;
+
+#define fixed32         int32_t
+#define fixed64         int64_t
+
+typedef fixed32 FFTSample;
+
+typedef struct FFTComplex
+{
+    fixed32 re, im;
+}
+FFTComplex;
+
+typedef struct FFTContext
+{
+    int nbits;
+    int inverse;
+    uint16_t *revtab;
+    FFTComplex *exptab;
+    FFTComplex *exptab1; /* only used by SSE code */
+    int (*fft_calc)(struct FFTContext *s, FFTComplex *z);
+}
+FFTContext;
+
+typedef struct MDCTContext
+{
+    int n;  /* size of MDCT (i.e. number of input data * 2) */
+    int nbits; /* n = 2^nbits */
+    /* pre/post rotation tables */
+    fixed32 *tcos;
+    fixed32 *tsin;
+    FFTContext fft;
+}
+MDCTContext;
+
+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 */
+    fixed32 exponents[MAX_CHANNELS][BLOCK_MAX_SIZE];
+    fixed32 max_exponent[MAX_CHANNELS];
+    int16_t coefs1[MAX_CHANNELS][BLOCK_MAX_SIZE];
+    fixed32 coefs[MAX_CHANNELS][BLOCK_MAX_SIZE];
+    MDCTContext mdct_ctx[BLOCK_NB_SIZES];
+    fixed32 *windows[BLOCK_NB_SIZES];
+    FFTComplex mdct_tmp[BLOCK_MAX_SIZE]; /* temporary storage for imdct */
+    /* 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]; /* padding added */
+    int last_bitoffset;
+    int last_superframe_len;
+    fixed32 noise_table[NOISE_TAB_SIZE];
+    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];
+    fixed64 lsp_pow_e_table[256];
+    fixed64 lsp_pow_m_table1[(1 << LSP_POW_BITS)];
+    fixed64 lsp_pow_m_table2[(1 << LSP_POW_BITS)];
+
+#ifdef TRACE
+
+    int frame_count;
+#endif
+}
+WMADecodeContext;
+
+int wma_decode_init(WMADecodeContext* s, asf_waveformatex_t *wfx);
+int wma_decode_superframe(WMADecodeContext* s,
+                          void *data, int *data_size,
+                          uint8_t *buf, int buf_size);
+int wma_decode_end(WMADecodeContext *s);
+
+#endif