mp3dec_own_fp.h

audio-video-codecs.rar语音编解码器

/*//////////////////////////////////////////////////////////////////////////////
//
//                  INTEL CORPORATION PROPRIETARY INFORMATION
//     This software is supplied under the terms of a license agreement or
//     nondisclosure agreement with Intel Corporation and may not be copied
//     or disclosed except in accordance with the terms of that agreement.
//          Copyright(c) 2005-2007 Intel Corporation. All Rights Reserved.
//
*/

#ifndef __MP3DEC_OWN_FP_H__
#define __MP3DEC_OWN_FP_H__

#include "math.h"
#include "mp3dec_own.h"

#ifdef __cplusplus
extern "C" {
#endif

typedef Ipp32f samplefloat[NUM_CHANNELS][1152];
typedef Ipp32f samplefloatrw[NUM_CHANNELS][36][32];

struct _MP3Dec {
    MP3Dec_com com;
    VM_ALIGN16_DECL(Ipp32u) global[1152 * NUM_CHANNELS * 2 + 576];
    VM_ALIGN16_DECL(Ipp32f) prevblk[2][576];
    VM_ALIGN16_DECL(Ipp32f) mc_pred_buf[2][8][36+9];
    VM_ALIGN16_DECL(Ipp32f) mc_lfe_buf[17];

    samplefloat *smpl_xr;       // out of dequantizer
    samplefloat *smpl_ro;       // out of reordering
    samplefloat *smpl_re;       // out of antialiasing
    samplefloatrw *smpl_rw;     // out of imdct
    samplefloat *smpl_sb;       // out of subband synth

    Ipp32f GlobalScaleFactor[2][2];

    IppsMDCTInvSpec_32f *pMDCTSpecShort;
    IppsMDCTInvSpec_32f *pMDCTSpecLong;
    IppsFilterSpec_PQMF_MP3 *pPQMFSpec[NUM_CHANNELS];
    Ipp8u *pqmf_mem;
    Ipp32s pqmf_size;

    Ipp8u *mdct_buffer;

    Ipp32s dctnum_prev[2];

    Ipp16s m_ptr[NUM_CHANNELS][2];
    Ipp16s m_even[NUM_CHANNELS];
};

extern Ipp32f mp3dec_scale_values[64];

Ipp32s mp3dec_decode_data_LayerI(MP3Dec *state);
Ipp32s mp3dec_decode_data_LayerII(MP3Dec *state);
MP3Status mp3dec_decode_data_LayerIII(MP3Dec *state);

void mp3dec_dequantize_sample_mc_l2(MP3Dec *state);
void mp3dec_mc_denormalize_sample_l2(MP3Dec *state);
void mp3dec_dequantize_sample_mc_l2 (MP3Dec *state);
void mp3dec_mc_lfe_l2(MP3Dec *state, Ipp32f *out);
void mp3dec_mc_dematricing (MP3Dec *state);
void mp3dec_mc_denormalizing (MP3Dec *state);

#ifdef __cplusplus
}
#endif

#endif