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/*
* COOK compatible decoder
* Copyright (c) 2003 Sascha Sommer
* Copyright (c) 2005 Benjamin Larsson
*
* This file is taken from FFmpeg.
*
* FFmpeg 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 2.1 of the License, or (at your option) any later version.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef _COOK_H
#define _COOK_H
#include <inttypes.h>
#include "ffmpeg_bitstream.h"
#include "../librm/rm.h"
#include "cookdata_fixpoint.h"
typedef struct {
int *now;
int *previous;
} cook_gains;
typedef struct cook {
/*
* The following 2 functions provide the lowlevel arithmetic on
* the internal audio buffers.
*/
void (* scalar_dequant)(struct cook *q, int index, int quant_index,
int* subband_coef_index, int* subband_coef_sign,
REAL_T* mlt_p);
void (* interpolate) (struct cook *q, REAL_T* buffer,
int gain_index, int gain_index_next);
GetBitContext gb;
int frame_number;
int block_align;
int extradata_size;
/* stream data */
int nb_channels;
int joint_stereo;
int bit_rate;
int sample_rate;
int samples_per_channel;
int samples_per_frame;
int subbands;
int log2_numvector_size;
int numvector_size; //1 << log2_numvector_size;
int js_subband_start;
int total_subbands;
int num_vectors;
int bits_per_subpacket;
int cookversion;
int mdct_nbits; /* is this the same as one of above? */
/* states */
int random_state;
/* gain buffers */
cook_gains gains1;
cook_gains gains2;
int gain_1[9];
int gain_2[9];
int gain_3[9];
int gain_4[9];
/* VLC data */
int js_vlc_bits;
VLC envelope_quant_index[13];
VLC sqvh[7]; //scalar quantization
VLC ccpl; //channel coupling
/* generatable tables and related variables */
int gain_size_factor;
/* data buffers */
uint8_t decoded_bytes_buffer[1024];
REAL_T mono_mdct_output[2048] __attribute__ ((aligned(16)));
REAL_T mono_previous_buffer1[1024];
REAL_T mono_previous_buffer2[1024];
REAL_T decode_buffer_1[1024];
REAL_T decode_buffer_2[1024];
REAL_T decode_buffer_0[1060]; /* static allocation for joint decode */
} COOKContext;
int cook_decode_init(RMContext *rmctx, COOKContext *q);
int cook_decode_frame(RMContext *rmctx,COOKContext *q,
int32_t *outbuffer, int *data_size,
const uint8_t *inbuffer, int buf_size);
#endif /*_COOK_H */
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