FFmpeg
ttadata.h
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1 /*
2  * TTA (The Lossless True Audio) data
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 #ifndef AVCODEC_TTADATA_H
22 #define AVCODEC_TTADATA_H
23 
24 #include "internal.h"
25 
26 #define MAX_ORDER 16
27 typedef struct TTAFilter {
32 } TTAFilter;
33 
34 typedef struct TTARice {
35  uint32_t k0, k1, sum0, sum1;
36 } TTARice;
37 
38 typedef struct TTAChannel {
42 } TTAChannel;
43 
44 extern const uint32_t ff_tta_shift_1[];
45 extern const uint32_t * const ff_tta_shift_16;
46 extern const uint8_t ff_tta_filter_configs[];
47 
48 void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1);
50 #endif /* AVCODEC_TTADATA_H */
MAX_ORDER
#define MAX_ORDER
Definition: ttadata.h:26
TTAChannel::rice
TTARice rice
Definition: ttadata.h:41
internal.h
ff_tta_rice_init
void ff_tta_rice_init(TTARice *c, uint32_t k0, uint32_t k1)
Definition: ttadata.c:40
ff_tta_filter_init
void ff_tta_filter_init(TTAFilter *c, int32_t shift)
Definition: ttadata.c:48
TTAChannel::predictor
int32_t predictor
Definition: ttadata.h:39
ff_tta_filter_configs
const uint8_t ff_tta_filter_configs[]
Definition: ttadata.c:38
TTARice::k1
uint32_t k1
Definition: ttadata.h:35
TTAFilter::dx
int32_t dx[MAX_ORDER]
Definition: ttadata.h:30
TTARice::sum1
uint32_t sum1
Definition: ttadata.h:35
TTAFilter::dl
int32_t dl[MAX_ORDER]
Definition: ttadata.h:31
TTARice::sum0
uint32_t sum0
Definition: ttadata.h:35
TTAFilter
Definition: ttadata.h:27
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
ff_tta_shift_1
const uint32_t ff_tta_shift_1[]
Definition: ttadata.c:23
ff_tta_shift_16
const uint32_t *const ff_tta_shift_16
Definition: ttadata.c:36
TTAFilter::error
int32_t error
Definition: ttadata.h:28
TTAFilter::round
int32_t round
Definition: ttadata.h:28
TTAChannel
Definition: ttadata.h:38
TTARice::k0
uint32_t k0
Definition: ttadata.h:35
TTAFilter::qm
int32_t qm[MAX_ORDER]
Definition: ttadata.h:29
TTAFilter::shift
int32_t shift
Definition: ttadata.h:28
TTARice
Definition: ttadata.h:34
shift
static int shift(int a, int b)
Definition: sonic.c:82
int32_t
int32_t
Definition: audioconvert.c:56
TTAChannel::filter
TTAFilter filter
Definition: ttadata.h:40