/*

 * WavPack decoder/encoder common code

 * Copyright (c) 2006,2011 Konstantin Shishkov

 *

 * This file is part of 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 AVCODEC_WAVPACK_H

#define AVCODEC_WAVPACK_H

#include <limits.h>

#include <stdint.h>

#include "libavutil/attributes.h"

#include "libavutil/intmath.h"

#define MAX_TERMS      16

#define MAX_TERM        8

#define WV_HEADER_SIZE    32

#define WV_MONO           0x00000004

#define WV_JOINT_STEREO   0x00000010

#define WV_CROSS_DECORR   0x00000020

#define WV_FLOAT_DATA     0x00000080

#define WV_INT32_DATA     0x00000100

#define WV_FALSE_STEREO   0x40000000

#define WV_DSD_DATA       0x80000000

#define WV_HYBRID_MODE    0x00000008

#define WV_HYBRID_SHAPE   0x00000008

#define WV_HYBRID_BITRATE 0x00000200

#define WV_HYBRID_BALANCE 0x00000400

#define WV_INITIAL_BLOCK  0x00000800

#define WV_FINAL_BLOCK    0x00001000

#define WV_MONO_DATA    (WV_MONO | WV_FALSE_STEREO)

#define WV_SINGLE_BLOCK (WV_INITIAL_BLOCK | WV_FINAL_BLOCK)

#define WV_FLT_SHIFT_ONES 0x01

#define WV_FLT_SHIFT_SAME 0x02

#define WV_FLT_SHIFT_SENT 0x04

#define WV_FLT_ZERO_SENT  0x08

#define WV_FLT_ZERO_SIGN  0x10

#define WV_MAX_CHANNELS   (1 << 12)

#define WV_MAX_SAMPLES    150000

enum WP_ID_Flags {

    WP_IDF_MASK   = 0x3F,

    WP_IDF_IGNORE = 0x20,

    WP_IDF_ODD    = 0x40,

    WP_IDF_LONG   = 0x80

};

enum WP_ID {

    WP_ID_DUMMY = 0,

    WP_ID_ENCINFO,

    WP_ID_DECTERMS,

    WP_ID_DECWEIGHTS,

    WP_ID_DECSAMPLES,

    WP_ID_ENTROPY,

    WP_ID_HYBRID,

    WP_ID_SHAPING,

    WP_ID_FLOATINFO,

    WP_ID_INT32INFO,

    WP_ID_DATA,

    WP_ID_CORR,

    WP_ID_EXTRABITS,

    WP_ID_CHANINFO,

    WP_ID_DSD_DATA,

    WP_ID_SAMPLE_RATE = 0x27,

};

typedef struct Decorr {

    int delta;

    int value;

    int weightA;

    int weightB;

    int samplesA[MAX_TERM];

    int samplesB[MAX_TERM];

    int sumA;

    int sumB;

} Decorr;

typedef struct WvChannel {

    int median[3];

    int slow_level, error_limit;

    unsigned bitrate_acc, bitrate_delta;

} WvChannel;

// macros for manipulating median values

#define GET_MED(n) ((c->median[n] >> 4) + 1)

#define DEC_MED(n) c->median[n] -= ((int)(c->median[n] + (128U >> (n)) - 2) / (128 >> (n))) * 2U

#define INC_MED(n) c->median[n] += ((int)(c->median[n] + (128U >> (n))    ) / (128 >> (n))) * 5U

// macros for applying weight

#define UPDATE_WEIGHT_CLIP(weight, delta, samples, in) \

    if ((samples) && (in)) { \

        if (((samples) ^ (in)) < 0) { \

            (weight) -= (delta); \

            if ((weight) < -1024) \

                (weight) = -1024; \

        } else { \

            (weight) += (delta); \

            if ((weight) > 1024) \

                (weight) = 1024; \

        } \

    }

static const int wv_rates[16] = {

     6000,  8000,  9600, 11025, 12000, 16000,  22050, 24000,

    32000, 44100, 48000, 64000, 88200, 96000, 192000,     0

};

// exponent table copied from WavPack source

extern const uint8_t ff_wp_exp2_table[256];

extern const uint8_t ff_wp_log2_table[256];

static av_always_inline int wp_exp2(int16_t val)

{

    int res, neg = 0;

    if (val < 0) {

        val = -val;

        neg = 1;

    }

    res   = ff_wp_exp2_table[val & 0xFF] | 0x100;

    val >>= 8;

    if (val > 31U)

        return INT_MIN;

    res   = (val > 9) ? (res << (val - 9)) : (res >> (9 - val));

    return neg ? -res : res;

}

Unexecuted instantiation: wavpackenc.c:wp_exp2

Unexecuted instantiation: wavpackdata.c:wp_exp2

wavpack.c:wp_exp2

Line

Count

Source

135

518k

{

136

518k

    int res, neg = 0;

137

138

518k

    if (val < 0) {

139

39.4k

        val = -val;

140

39.4k

        neg = 1;

141

39.4k

    }

142

143

518k

    res   = ff_wp_exp2_table[val & 0xFF] | 0x100;

144

518k

    val >>= 8;

145

518k

    if (val > 31U)

146

51.8k

        return INT_MIN;

147

467k

    res   = (val > 9) ? (res << (val - 9)) : (res >> (9 - val));

148

467k

    return neg ? -res : res;

149

518k

}

static av_always_inline int wp_log2(uint32_t val)

{

    int bits;

    if (!val)

        return 0;

    if (val == 1)

        return 256;

    val += val >> 9;

    bits = av_log2(val) + 1;

    if (bits < 9)

        return (bits << 8) + ff_wp_log2_table[(val << (9 - bits)) & 0xFF];

    else

        return (bits << 8) + ff_wp_log2_table[(val >> (bits - 9)) & 0xFF];

}

Unexecuted instantiation: wavpackenc.c:wp_log2

Unexecuted instantiation: wavpackdata.c:wp_log2

wavpack.c:wp_log2

Line

Count

Source

152

2.70M

{

153

2.70M

    int bits;

154

155

2.70M

    if (!val)

156

635k

        return 0;

157

2.06M

    if (val == 1)

158

50.6k

        return 256;

159

2.01M

    val += val >> 9;

160

2.01M

    bits = av_log2(val) + 1;

161

2.01M

    if (bits < 9)

162

263k

        return (bits << 8) + ff_wp_log2_table[(val << (9 - bits)) & 0xFF];

163

1.75M

    else

164

1.75M

        return (bits << 8) + ff_wp_log2_table[(val >> (bits - 9)) & 0xFF];

165

2.01M

}

#endif /* AVCODEC_WAVPACK_H */