drm_dec.h
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上传日期:2015-12-05
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- /*
- ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
- ** Copyright (C) 2003-2005 M. Bakker, Ahead Software AG, http://www.nero.com
- **
- ** This program is free software; you can redistribute it and/or modify
- ** it under the terms of the GNU General Public License as published by
- ** the Free Software Foundation; either version 2 of the License, or
- ** (at your option) any later version.
- **
- ** This program 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 General Public License for more details.
- **
- ** You should have received a copy of the GNU General Public License
- ** along with this program; if not, write to the Free Software
- ** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
- **
- ** Any non-GPL usage of this software or parts of this software is strictly
- ** forbidden.
- **
- ** Software using this code must display the following message visibly in the
- ** software:
- ** "FAAD2 AAC/HE-AAC/HE-AACv2/DRM decoder (c) Ahead Software, www.nero.com"
- ** in, for example, the about-box or help/startup screen.
- **
- ** Commercial non-GPL licensing of this software is possible.
- ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
- **
- ** $Id: drm_dec.h,v 1.1 2005/11/06 10:54:47 gabest Exp $
- **/
- #ifndef __DRM_DEC_H__
- #define __DRM_DEC_H__
- #ifdef __cplusplus
- extern "C" {
- #endif
- #include "bits.h"
- #define DRM_PARAMETRIC_STEREO 0
- #define DRM_NUM_SA_BANDS 8
- #define DRM_NUM_PAN_BANDS 20
- #define NUM_OF_LINKS 3
- #define NUM_OF_QMF_CHANNELS 64
- #define NUM_OF_SUBSAMPLES 30
- #define MAX_SA_BAND 46
- #define MAX_PAN_BAND 64
- #define MAX_DELAY 5
- typedef struct
- {
- uint8_t drm_ps_data_available;
- uint8_t bs_enable_sa;
- uint8_t bs_enable_pan;
- uint8_t bs_sa_dt_flag;
- uint8_t bs_pan_dt_flag;
- uint8_t g_last_had_sa;
- uint8_t g_last_had_pan;
- int8_t bs_sa_data[DRM_NUM_SA_BANDS];
- int8_t bs_pan_data[DRM_NUM_PAN_BANDS];
-
- int8_t g_sa_index[DRM_NUM_SA_BANDS];
- int8_t g_pan_index[DRM_NUM_PAN_BANDS];
- int8_t g_prev_sa_index[DRM_NUM_SA_BANDS];
- int8_t g_prev_pan_index[DRM_NUM_PAN_BANDS];
- int8_t sa_decode_error;
- int8_t pan_decode_error;
- int8_t g_last_good_sa_index[DRM_NUM_SA_BANDS];
- int8_t g_last_good_pan_index[DRM_NUM_PAN_BANDS];
-
- qmf_t SA[NUM_OF_SUBSAMPLES][MAX_SA_BAND];
- complex_t d_buff[2][MAX_SA_BAND];
- complex_t d2_buff[NUM_OF_LINKS][MAX_DELAY][MAX_SA_BAND];
- uint8_t delay_buf_index_ser[NUM_OF_LINKS];
-
- real_t prev_nrg[MAX_SA_BAND];
- real_t prev_peakdiff[MAX_SA_BAND];
- real_t peakdecay_fast[MAX_SA_BAND];
- } drm_ps_info;
- uint16_t drm_ps_data(drm_ps_info *ps, bitfile *ld);
- drm_ps_info *drm_ps_init(void);
- void drm_ps_free(drm_ps_info *ps);
- uint8_t drm_ps_decode(drm_ps_info *ps, uint8_t guess, qmf_t X_left[38][64], qmf_t X_right[38][64]);
- #ifdef __cplusplus
- }
- #endif
- #endif