/*

 * Copyright (c) 2012 Andrew D'Addesio

 * Copyright (c) 2013-2014 Mozilla Corporation

 * Copyright (c) 2017 Rostislav Pehlivanov <atomnuker@gmail.com>

 *

 * 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_OPUS_RC_H

#define AVCODEC_OPUS_RC_H

#include <stdint.h>

#include "libavcodec/get_bits.h"

#include "opus.h"

#define opus_ilog(i) (av_log2(i) + !!(i))

typedef struct RawBitsContext {

    const uint8_t *position;

    uint32_t bytes;

    uint32_t cachelen;

    uint32_t cacheval;

} RawBitsContext;

typedef struct OpusRangeCoder {

    GetBitContext gb;

    RawBitsContext rb;

    uint32_t range;

    uint32_t value;

    uint32_t total_bits;

    /* Encoder */

    uint8_t buf[OPUS_MAX_FRAME_SIZE + 12]; /* memcpy vs (memmove + overreading) */

    uint8_t *rng_cur;                      /* Current range coded byte */

    int ext;                               /* Awaiting propagation */

    int rem;                               /* Carryout flag */

    /* Encoding stats */

    int waste;

} OpusRangeCoder;

/**

 * CELT: estimate bits of entropy that have thus far been consumed for the

 *       current CELT frame, to integer and fractional (1/8th bit) precision

 */

static av_always_inline uint32_t opus_rc_tell(const OpusRangeCoder *rc)

{

    return rc->total_bits - av_log2(rc->range) - 1;

}

Unexecuted instantiation: enc.c:opus_rc_tell

Unexecuted instantiation: enc_psy.c:opus_rc_tell

Unexecuted instantiation: pvq.c:opus_rc_tell

Unexecuted instantiation: rc.c:opus_rc_tell

celt.c:opus_rc_tell

Line

Count

Source

63

89.9k

{

64

89.9k

    return rc->total_bits - av_log2(rc->range) - 1;

65

89.9k

}

dec.c:opus_rc_tell

Line

Count

Source

63

262k

{

64

262k

    return rc->total_bits - av_log2(rc->range) - 1;

65

262k

}

dec_celt.c:opus_rc_tell

Line

Count

Source

63

3.94M

{

64

3.94M

    return rc->total_bits - av_log2(rc->range) - 1;

65

3.94M

}

Unexecuted instantiation: silk.c:opus_rc_tell

static av_always_inline uint32_t opus_rc_tell_frac(const OpusRangeCoder *rc)

{

    uint32_t i, total_bits, rcbuffer, range;

    total_bits = rc->total_bits << 3;

    rcbuffer   = av_log2(rc->range) + 1;

    range      = rc->range >> (rcbuffer-16);

    for (i = 0; i < 3; i++) {

        int bit;

        range = range * range >> 15;

        bit = range >> 16;

        rcbuffer = rcbuffer << 1 | bit;

        range >>= bit;

    }

    return total_bits - rcbuffer;

}

Unexecuted instantiation: enc.c:opus_rc_tell_frac

Unexecuted instantiation: enc_psy.c:opus_rc_tell_frac

pvq.c:opus_rc_tell_frac

Line

Count

Source

68

2.48M

{

69

2.48M

    uint32_t i, total_bits, rcbuffer, range;

70

71

2.48M

    total_bits = rc->total_bits << 3;

72

2.48M

    rcbuffer   = av_log2(rc->range) + 1;

73

2.48M

    range      = rc->range >> (rcbuffer-16);

74

75

9.94M

    for (i = 0; i < 3; i++) {

76

7.46M

        int bit;

77

7.46M

        range = range * range >> 15;

78

7.46M

        bit = range >> 16;

79

7.46M

        rcbuffer = rcbuffer << 1 | bit;

80

7.46M

        range >>= bit;

81

7.46M

    }

82

83

2.48M

    return total_bits - rcbuffer;

84

2.48M

}

Unexecuted instantiation: rc.c:opus_rc_tell_frac

celt.c:opus_rc_tell_frac

Line

Count

Source

68

3.21M

{

69

3.21M

    uint32_t i, total_bits, rcbuffer, range;

70

71

3.21M

    total_bits = rc->total_bits << 3;

72

3.21M

    rcbuffer   = av_log2(rc->range) + 1;

73

3.21M

    range      = rc->range >> (rcbuffer-16);

74

75

12.8M

    for (i = 0; i < 3; i++) {

76

9.63M

        int bit;

77

9.63M

        range = range * range >> 15;

78

9.63M

        bit = range >> 16;

79

9.63M

        rcbuffer = rcbuffer << 1 | bit;

80

9.63M

        range >>= bit;

81

9.63M

    }

82

83

3.21M

    return total_bits - rcbuffer;

84

3.21M

}

Unexecuted instantiation: dec.c:opus_rc_tell_frac

Unexecuted instantiation: dec_celt.c:opus_rc_tell_frac

Unexecuted instantiation: silk.c:opus_rc_tell_frac

uint32_t ff_opus_rc_dec_cdf(OpusRangeCoder *rc, const uint16_t *cdf);

void     ff_opus_rc_enc_cdf(OpusRangeCoder *rc, int val, const uint16_t *cdf);

uint32_t ff_opus_rc_dec_log(OpusRangeCoder *rc, uint32_t bits);

void     ff_opus_rc_enc_log(OpusRangeCoder *rc, int val, uint32_t bits);

uint32_t ff_opus_rc_dec_uint_step(OpusRangeCoder *rc, int k0);

void     ff_opus_rc_enc_uint_step(OpusRangeCoder *rc, uint32_t val, int k0);

uint32_t ff_opus_rc_dec_uint_tri(OpusRangeCoder *rc, int qn);

void     ff_opus_rc_enc_uint_tri(OpusRangeCoder *rc, uint32_t k, int qn);

uint32_t ff_opus_rc_dec_uint(OpusRangeCoder *rc, uint32_t size);

void     ff_opus_rc_enc_uint(OpusRangeCoder *rc, uint32_t val, uint32_t size);

uint32_t ff_opus_rc_get_raw(OpusRangeCoder *rc, uint32_t count);

void     ff_opus_rc_put_raw(OpusRangeCoder *rc, uint32_t val, uint32_t count);

int      ff_opus_rc_dec_laplace(OpusRangeCoder *rc, uint32_t symbol, int decay);

void     ff_opus_rc_enc_laplace(OpusRangeCoder *rc, int *value, uint32_t symbol, int decay);

int      ff_opus_rc_dec_init(OpusRangeCoder *rc, const uint8_t *data, int size);

void     ff_opus_rc_dec_raw_init(OpusRangeCoder *rc, const uint8_t *rightend, uint32_t bytes);

void     ff_opus_rc_enc_end(OpusRangeCoder *rc, uint8_t *dst, int size);

void     ff_opus_rc_enc_init(OpusRangeCoder *rc);

#define OPUS_RC_CHECKPOINT_UPDATE(rc) \

    rc_rollback_bits = opus_rc_tell_frac(rc); \

    rc_rollback_ctx  = *rc

#define OPUS_RC_CHECKPOINT_SPAWN(rc) \

    uint32_t rc_rollback_bits = opus_rc_tell_frac(rc); \

    OpusRangeCoder rc_rollback_ctx = *rc \

#define OPUS_RC_CHECKPOINT_BITS(rc) \

    (opus_rc_tell_frac(rc) - rc_rollback_bits)

#define OPUS_RC_CHECKPOINT_ROLLBACK(rc) \

    memcpy(rc, &rc_rollback_ctx, sizeof(OpusRangeCoder)); \

#endif /* AVCODEC_OPUS_RC_H */