FFmpeg
proresdsp.c
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1 /*
2  * Apple ProRes compatible decoder
3  *
4  * Copyright (c) 2010-2011 Maxim Poliakovski
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 #include "libavutil/attributes.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/common.h"
27 #include "libavutil/intreadwrite.h"
28 #include "idctdsp.h"
29 #include "proresdsp.h"
30 
31 #define IN_IDCT_DEPTH 16
32 #define PRORES_ONLY
33 
34 #define BIT_DEPTH 10
35 #define EXTRA_SHIFT
36 #include "simple_idct_template.c"
37 #undef BIT_DEPTH
38 #undef EXTRA_SHIFT
39 
40 #define BIT_DEPTH 12
41 #include "simple_idct_template.c"
42 #undef BIT_DEPTH
43 
44 /**
45  * Special version of ff_simple_idct_int16_10bit() which does dequantization
46  * and scales by a factor of 2 more between the two IDCTs to account
47  * for larger scale of input coefficients.
48  */
49 static void prores_idct_10(int16_t *restrict block, const int16_t *restrict qmat)
50 {
51  for (int i = 0; i < 64; i++)
52  block[i] *= qmat[i];
53 
54  for (int i = 0; i < 8; i++)
55  idctRowCondDC_extrashift_10(block + i*8, 2);
56 
57  for (int i = 0; i < 8; i++) {
58  block[i] += 8192;
59  idctSparseCol_extrashift_10(block + i);
60  }
61 }
62 
63 static void prores_idct_12(int16_t *restrict block, const int16_t *restrict qmat)
64 {
65  for (int i = 0; i < 64; i++)
66  block[i] *= qmat[i];
67 
68  for (int i = 0; i < 8; i++)
69  idctRowCondDC_int16_12bit(block + i*8, 0);
70 
71  for (int i = 0; i < 8; i++) {
72  block[i] += 8192;
73  idctSparseCol_int16_12bit(block + i);
74  }
75 }
76 
77 #define CLIP_MIN (1 << 2) ///< minimum value for clipping resulting pixels
78 #define CLIP_MAX_10 (1 << 10) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
79 #define CLIP_MAX_12 (1 << 12) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
80 
81 #define CLIP_10(x) (av_clip((x), CLIP_MIN, CLIP_MAX_10))
82 #define CLIP_12(x) (av_clip((x), CLIP_MIN, CLIP_MAX_12))
83 
84 /**
85  * Add bias value, clamp and output pixels of a slice
86  */
87 
88 static inline void put_pixel(uint16_t *dst, ptrdiff_t linesize, const int16_t *in, int bits_per_raw_sample) {
89  for (int y = 0; y < 8; y++, dst += linesize) {
90  for (int x = 0; x < 8; x++) {
91  int src_offset = (y << 3) + x;
92 
93  if (bits_per_raw_sample == 10) {
94  dst[x] = CLIP_10(in[src_offset]);
95  } else {//12b
96  dst[x] = CLIP_12(in[src_offset]);
97  }
98  }
99  }
100 }
101 
102 static void put_pixels_10(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
103 {
104  put_pixel(dst, linesize, in, 10);
105 }
106 
107 static void put_pixels_12(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
108 {
109  put_pixel(dst, linesize, in, 12);
110 }
111 
112 static void prores_idct_put_10_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
113 {
114  prores_idct_10(block, qmat);
115  put_pixels_10(out, linesize >> 1, block);
116 }
117 
118 static void prores_idct_put_12_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
119 {
120  prores_idct_12(block, qmat);
121  put_pixels_12(out, linesize >> 1, block);
122 }
123 
124 av_cold void ff_proresdsp_init(ProresDSPContext *dsp, int bits_per_raw_sample)
125 {
126  if (bits_per_raw_sample == 10) {
129  } else {
130  av_assert1(bits_per_raw_sample == 12);
133  }
134 
135 #if ARCH_X86
136  ff_proresdsp_init_x86(dsp, bits_per_raw_sample);
137 #endif
138 
140  dsp->idct_permutation_type);
141 }
out
FILE * out
Definition: movenc.c:55
ProresDSPContext::idct_permutation_type
int idct_permutation_type
Definition: proresdsp.h:30
ff_proresdsp_init_x86
void ff_proresdsp_init_x86(ProresDSPContext *dsp, int bits_per_raw_sample)
Definition: proresdsp_init.c:33
put_pixel
static void put_pixel(uint16_t *dst, ptrdiff_t linesize, const int16_t *in, int bits_per_raw_sample)
Add bias value, clamp and output pixels of a slice.
Definition: proresdsp.c:88
put_pixels_12
static void put_pixels_12(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
Definition: proresdsp.c:107
ProresDSPContext
Definition: proresdsp.h:29
prores_idct_10
static void prores_idct_10(int16_t *restrict block, const int16_t *restrict qmat)
Special version of ff_simple_idct_int16_10bit() which does dequantization and scales by a factor of 2...
Definition: proresdsp.c:49
avassert.h
av_cold
#define av_cold
Definition: attributes.h:90
intreadwrite.h
CLIP_12
#define CLIP_12(x)
Definition: proresdsp.c:82
ProresDSPContext::idct_permutation
uint8_t idct_permutation[64]
Definition: proresdsp.h:31
ff_proresdsp_init
av_cold void ff_proresdsp_init(ProresDSPContext *dsp, int bits_per_raw_sample)
Definition: proresdsp.c:124
dst
uint8_t ptrdiff_t const uint8_t ptrdiff_t int intptr_t intptr_t int int16_t * dst
Definition: dsp.h:83
FF_IDCT_PERM_NONE
@ FF_IDCT_PERM_NONE
Definition: idctdsp.h:28
CLIP_10
#define CLIP_10(x)
Definition: proresdsp.c:81
attributes.h
proresdsp.h
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
common.h
av_assert1
#define av_assert1(cond)
assert() equivalent, that does not lie in speed critical code.
Definition: avassert.h:56
idctdsp.h
prores_idct_12
static void prores_idct_12(int16_t *restrict block, const int16_t *restrict qmat)
Definition: proresdsp.c:63
put_pixels_10
static void put_pixels_10(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
Definition: proresdsp.c:102
prores_idct_put_10_c
static void prores_idct_put_10_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
Definition: proresdsp.c:112
ff_init_scantable_permutation
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
Definition: idctdsp.c:39
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
ProresDSPContext::idct_put
void(* idct_put)(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
Definition: proresdsp.h:32
prores_idct_put_12_c
static void prores_idct_put_12_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
Definition: proresdsp.c:118
simple_idct_template.c