FFmpeg: libavcodec/proresdsp.c Source File

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/common.h"
26 #include "idctdsp.h"
27 #include "proresdsp.h"
28 #include "simple_idct.h"
29 
30  #define CLIP_MIN (1 << 2) ///< minimum value for clipping resulting pixels
31  #define CLIP_MAX_10 (1 << 10) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
32  #define CLIP_MAX_12 (1 << 12) - CLIP_MIN - 1 ///< maximum value for clipping resulting pixels
33 
34  #define CLIP_10(x) (av_clip((x), CLIP_MIN, CLIP_MAX_10))
35  #define CLIP_12(x) (av_clip((x), CLIP_MIN, CLIP_MAX_12))
36 
37 /**
38  * Add bias value, clamp and output pixels of a slice
39  */
40 
41  static inline void put_pixel(uint16_t *dst, ptrdiff_t linesize, const int16_t *in, int bits_per_raw_sample) {
42  int x, y, src_offset, dst_offset;
43 
44  for (y = 0, dst_offset = 0; y < 8; y++, dst_offset += linesize) {
45  for (x = 0; x < 8; x++) {
46  src_offset = (y << 3) + x;
47 
48  if (bits_per_raw_sample == 10) {
49  dst[dst_offset + x] = CLIP_10(in[src_offset]);
50  } else {//12b
51  dst[dst_offset + x] = CLIP_12(in[src_offset]);
52  }
53  }
54  }
55 }
56 
57  static void put_pixels_10(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
58 {
59  put_pixel(dst, linesize, in, 10);
60 }
61 
62  static void put_pixels_12(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
63 {
64  put_pixel(dst, linesize, in, 12);
65 }
66 
67  static void prores_idct_put_10_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
68 {
69  ff_prores_idct_10(block, qmat);
70  put_pixels_10(out, linesize >> 1, block);
71 }
72 
73  static void prores_idct_put_12_c(uint16_t *out, ptrdiff_t linesize, int16_t *block, const int16_t *qmat)
74 {
75  ff_prores_idct_12(block, qmat);
76  put_pixels_12(out, linesize >> 1, block);
77 }
78 
79  av_cold int ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx)
80 {
81  if (avctx->bits_per_raw_sample == 10) {
82  dsp->idct_put = prores_idct_put_10_c;
83  dsp->idct_permutation_type = FF_IDCT_PERM_NONE;
84  } else if (avctx->bits_per_raw_sample == 12) {
85  dsp->idct_put = prores_idct_put_12_c;
86  dsp->idct_permutation_type = FF_IDCT_PERM_NONE;
87  } else {
88  return AVERROR_BUG;
89  }
90 
91 #if ARCH_X86
92  ff_proresdsp_init_x86(dsp, avctx);
93 #endif
94 
95  ff_init_scantable_permutation(dsp->idct_permutation,
96  dsp->idct_permutation_type);
97  return 0;
98 }
out
FILE * out
Definition: movenc.c:54
ff_proresdsp_init
av_cold int ff_proresdsp_init(ProresDSPContext *dsp, AVCodecContext *avctx)
Definition: proresdsp.c:79
ProresDSPContext::idct_permutation_type
int idct_permutation_type
Definition: proresdsp.h:31
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:41
put_pixels_12
static void put_pixels_12(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
Definition: proresdsp.c:62
ProresDSPContext
Definition: proresdsp.h:30
av_cold
#define av_cold
Definition: attributes.h:90
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1448
simple_idct.h
CLIP_12
#define CLIP_12(x)
Definition: proresdsp.c:35
ProresDSPContext::idct_permutation
uint8_t idct_permutation[64]
Definition: proresdsp.h:32
FF_IDCT_PERM_NONE
@ FF_IDCT_PERM_NONE
Definition: idctdsp.h:38
CLIP_10
#define CLIP_10(x)
Definition: proresdsp.c:34
attributes.h
proresdsp.h
common.h
idctdsp.h
AVCodecContext
main external API structure.
Definition: avcodec.h:389
ff_prores_idct_12
void ff_prores_idct_12(int16_t *block, const int16_t *qmat)
Definition: simple_idct.c:255
put_pixels_10
static void put_pixels_10(uint16_t *dst, ptrdiff_t linesize, const int16_t *in)
Definition: proresdsp.c:57
ff_prores_idct_10
void ff_prores_idct_10(int16_t *block, const int16_t *qmat)
Special version of ff_simple_idct_int16_10bit() which does dequantization and scales by a factor of 2...
Definition: simple_idct.c:239
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:67
ff_init_scantable_permutation
av_cold void ff_init_scantable_permutation(uint8_t *idct_permutation, enum idct_permutation_type perm_type)
Definition: idctdsp.c:51
ff_proresdsp_init_x86
void ff_proresdsp_init_x86(ProresDSPContext *dsp, AVCodecContext *avctx)
Definition: proresdsp_init.c:33
AVERROR_BUG
#define AVERROR_BUG
Internal bug, also see AVERROR_BUG2.
Definition: error.h:52
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:33
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:73
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