apps/codecs/libcook/cook.h

   1 /*
   2  * COOK compatible decoder
   3  * Copyright (c) 2003 Sascha Sommer
   4  * Copyright (c) 2005 Benjamin Larsson
   5  *
   6  * This file is taken from FFmpeg.
   7  *
   8  * FFmpeg is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * FFmpeg is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with FFmpeg; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22 #ifndef _COOK_H
  23 #define _COOK_H
  24
  25 #include <inttypes.h>
  26 #include "ffmpeg_bitstream.h"
  27 #include "../librm/rm.h"
  28 #include "cookdata_fixpoint.h"
  29
  30 typedef struct {
  31     int *now;
  32     int *previous;
  33 } cook_gains;
  34
  35 typedef struct cook {
  36     /*
  37      * The following 2 functions provide the lowlevel arithmetic on
  38      * the internal audio buffers.
  39      */
  40     void (* scalar_dequant)(struct cook *q, int index, int quant_index,
  41                             int* subband_coef_index, int* subband_coef_sign,
  42                             REAL_T* mlt_p);
  43
  44     void (* interpolate) (struct cook *q, REAL_T* buffer,
  45                           int gain_index, int gain_index_next);
  46
  47     GetBitContext       gb;
  48     int                 frame_number;
  49     int                 block_align;
  50     int                 extradata_size;
  51     /* stream data */
  52     int                 nb_channels;
  53     int                 joint_stereo;
  54     int                 bit_rate;
  55     int                 sample_rate;
  56     int                 samples_per_channel;
  57     int                 samples_per_frame;
  58     int                 subbands;
  59     int                 log2_numvector_size;
  60     int                 numvector_size;                //1 << log2_numvector_size;
  61     int                 js_subband_start;
  62     int                 total_subbands;
  63     int                 num_vectors;
  64     int                 bits_per_subpacket;
  65     int                 cookversion;
  66     /* states */
  67     int                 random_state;
  68
  69     /* gain buffers */
  70     cook_gains          gains1;
  71     cook_gains          gains2;
  72     int                 gain_1[9];
  73     int                 gain_2[9];
  74     int                 gain_3[9];
  75     int                 gain_4[9];
  76
  77     /* VLC data */
  78     int                 js_vlc_bits;
  79     VLC                 envelope_quant_index[13];
  80     VLC                 sqvh[7];          //scalar quantization
  81     VLC                 ccpl;             //channel coupling
  82
  83     /* generatable tables and related variables */
  84     int                 gain_size_factor;
  85
  86     /* data buffers */
  87
  88     uint8_t             decoded_bytes_buffer[1024];
  89     REAL_T mono_mdct_output[2048] __attribute__ ((aligned(16)));
  90     REAL_T              mono_previous_buffer1[1024];
  91     REAL_T              mono_previous_buffer2[1024];
  92     REAL_T              decode_buffer_1[1024];
  93     REAL_T              decode_buffer_2[1024];
  94     REAL_T              decode_buffer_0[1060]; /* static allocation for joint decode */
  95 } COOKContext;
  96
  97 int cook_decode_init(RMContext *rmctx, COOKContext *q);
  98 int cook_decode_frame(RMContext *rmctx,COOKContext *q,
  99                       int16_t *outbuffer, int *data_size,
 100                       const uint8_t *inbuffer, int buf_size);
 101 #endif /*_COOK_H */