• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
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 
put_pixel(uint16_t * dst,ptrdiff_t linesize,const int16_t * in,int bits_per_raw_sample)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 
put_pixels_10(uint16_t * dst,ptrdiff_t linesize,const int16_t * in)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 
put_pixels_12(uint16_t * dst,ptrdiff_t linesize,const int16_t * in)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 
prores_idct_put_10_c(uint16_t * out,ptrdiff_t linesize,int16_t * block,const int16_t * qmat)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 
prores_idct_put_12_c(uint16_t * out,ptrdiff_t linesize,int16_t * block,const int16_t * qmat)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 
ff_proresdsp_init(ProresDSPContext * dsp,AVCodecContext * avctx)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 
94     ff_init_scantable_permutation(dsp->idct_permutation,
95                                   dsp->idct_permutation_type);
96     return 0;
97 }
98