mirror of https://git.ffmpeg.org/ffmpeg.git
197 lines
7.3 KiB
C
197 lines
7.3 KiB
C
/*
|
|
* 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 "libavutil/common.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_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_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_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] -= ((c->median[n] + (128 >> (n)) - 2) / (128 >> (n))) * 2U
|
|
#define INC_MED(n) c->median[n] += ((c->median[n] + (128 >> (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
|
|
static const uint8_t wp_exp2_table[256] = {
|
|
0x00, 0x01, 0x01, 0x02, 0x03, 0x03, 0x04, 0x05, 0x06, 0x06, 0x07, 0x08, 0x08, 0x09, 0x0a, 0x0b,
|
|
0x0b, 0x0c, 0x0d, 0x0e, 0x0e, 0x0f, 0x10, 0x10, 0x11, 0x12, 0x13, 0x13, 0x14, 0x15, 0x16, 0x16,
|
|
0x17, 0x18, 0x19, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1d, 0x1e, 0x1f, 0x20, 0x20, 0x21, 0x22, 0x23,
|
|
0x24, 0x24, 0x25, 0x26, 0x27, 0x28, 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2c, 0x2d, 0x2e, 0x2f, 0x30,
|
|
0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x3a, 0x3b, 0x3c, 0x3d,
|
|
0x3e, 0x3f, 0x40, 0x41, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x48, 0x49, 0x4a, 0x4b,
|
|
0x4c, 0x4d, 0x4e, 0x4f, 0x50, 0x51, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a,
|
|
0x5b, 0x5c, 0x5d, 0x5e, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69,
|
|
0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79,
|
|
0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x87, 0x88, 0x89, 0x8a,
|
|
0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b,
|
|
0x9c, 0x9d, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad,
|
|
0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0,
|
|
0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc8, 0xc9, 0xca, 0xcb, 0xcd, 0xce, 0xcf, 0xd0, 0xd2, 0xd3, 0xd4,
|
|
0xd6, 0xd7, 0xd8, 0xd9, 0xdb, 0xdc, 0xdd, 0xde, 0xe0, 0xe1, 0xe2, 0xe4, 0xe5, 0xe6, 0xe8, 0xe9,
|
|
0xea, 0xec, 0xed, 0xee, 0xf0, 0xf1, 0xf2, 0xf4, 0xf5, 0xf6, 0xf8, 0xf9, 0xfa, 0xfc, 0xfd, 0xff
|
|
};
|
|
|
|
static const uint8_t wp_log2_table [] = {
|
|
0x00, 0x01, 0x03, 0x04, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x10, 0x11, 0x12, 0x14, 0x15,
|
|
0x16, 0x18, 0x19, 0x1a, 0x1c, 0x1d, 0x1e, 0x20, 0x21, 0x22, 0x24, 0x25, 0x26, 0x28, 0x29, 0x2a,
|
|
0x2c, 0x2d, 0x2e, 0x2f, 0x31, 0x32, 0x33, 0x34, 0x36, 0x37, 0x38, 0x39, 0x3b, 0x3c, 0x3d, 0x3e,
|
|
0x3f, 0x41, 0x42, 0x43, 0x44, 0x45, 0x47, 0x48, 0x49, 0x4a, 0x4b, 0x4d, 0x4e, 0x4f, 0x50, 0x51,
|
|
0x52, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59, 0x5a, 0x5c, 0x5d, 0x5e, 0x5f, 0x60, 0x61, 0x62, 0x63,
|
|
0x64, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, 0x70, 0x71, 0x72, 0x74, 0x75,
|
|
0x76, 0x77, 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, 0x80, 0x81, 0x82, 0x83, 0x84, 0x85,
|
|
0x86, 0x87, 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, 0x90, 0x91, 0x92, 0x93, 0x94, 0x95,
|
|
0x96, 0x97, 0x98, 0x99, 0x9a, 0x9b, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, 0xa0, 0xa1, 0xa2, 0xa3, 0xa4,
|
|
0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb2,
|
|
0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc0,
|
|
0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcb, 0xcc, 0xcd, 0xce,
|
|
0xcf, 0xd0, 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd8, 0xd9, 0xda, 0xdb,
|
|
0xdc, 0xdc, 0xdd, 0xde, 0xdf, 0xe0, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe4, 0xe5, 0xe6, 0xe7, 0xe7,
|
|
0xe8, 0xe9, 0xea, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xee, 0xef, 0xf0, 0xf1, 0xf1, 0xf2, 0xf3, 0xf4,
|
|
0xf4, 0xf5, 0xf6, 0xf7, 0xf7, 0xf8, 0xf9, 0xf9, 0xfa, 0xfb, 0xfc, 0xfc, 0xfd, 0xfe, 0xff, 0xff
|
|
};
|
|
|
|
static av_always_inline int wp_exp2(int16_t val)
|
|
{
|
|
int res, neg = 0;
|
|
|
|
if (val < 0) {
|
|
val = -val;
|
|
neg = 1;
|
|
}
|
|
|
|
res = 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;
|
|
}
|
|
|
|
static av_always_inline int wp_log2(int32_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) + wp_log2_table[(val << (9 - bits)) & 0xFF];
|
|
else
|
|
return (bits << 8) + wp_log2_table[(val >> (bits - 9)) & 0xFF];
|
|
}
|
|
|
|
#endif /* AVCODEC_WAVPACK_H */
|