diff options
Diffstat (limited to 'lib/rbcodec/codecs/libtremor/ffmpeg_stuff.h')
-rw-r--r-- | lib/rbcodec/codecs/libtremor/ffmpeg_stuff.h | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/lib/rbcodec/codecs/libtremor/ffmpeg_stuff.h b/lib/rbcodec/codecs/libtremor/ffmpeg_stuff.h new file mode 100644 index 0000000000..d7fa846507 --- /dev/null +++ b/lib/rbcodec/codecs/libtremor/ffmpeg_stuff.h | |||
@@ -0,0 +1,140 @@ | |||
1 | /** | ||
2 | * @file | ||
3 | * Common code for Vorbis I encoder and decoder | ||
4 | * @author Denes Balatoni ( dbalatoni programozo hu ) | ||
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 | /* render_line and friend taken from ffmpeg (libavcodec/vorbis.c) */ | ||
24 | |||
25 | #include "misc.h" | ||
26 | |||
27 | static inline void render_line_unrolled(int x, int y, int x1, | ||
28 | int sy, int ady, int adx, | ||
29 | const ogg_int32_t *lookup, ogg_int32_t *buf) | ||
30 | { | ||
31 | int err = -adx; | ||
32 | x -= x1 - 1; | ||
33 | buf += x1 - 1; | ||
34 | while (++x < 0) { | ||
35 | err += ady; | ||
36 | if (err >= 0) { | ||
37 | err += ady - adx; | ||
38 | y += sy; | ||
39 | buf[x] = MULT31_SHIFT15(buf[x],lookup[y]); | ||
40 | x++; | ||
41 | } | ||
42 | buf[x] = MULT31_SHIFT15(buf[x],lookup[y]); | ||
43 | } | ||
44 | if (x <= 0) { | ||
45 | if (err + ady >= 0) | ||
46 | y += sy; | ||
47 | buf[x] = MULT31_SHIFT15(buf[x],lookup[y]); | ||
48 | } | ||
49 | } | ||
50 | |||
51 | static inline void render_line(int x0, int y0, int x1, int y1, | ||
52 | const ogg_int32_t *lookup, ogg_int32_t *buf) | ||
53 | { | ||
54 | int dy = y1 - y0; | ||
55 | int adx = x1 - x0; | ||
56 | int ady = abs(dy); | ||
57 | int sy = dy < 0 ? -1 : 1; | ||
58 | buf[x0] = MULT31_SHIFT15(buf[x0],lookup[y0]); | ||
59 | if (ady*2 <= adx) { // optimized common case | ||
60 | render_line_unrolled(x0, y0, x1, sy, ady, adx, lookup, buf); | ||
61 | } else { | ||
62 | int base = dy / adx; | ||
63 | int x = x0; | ||
64 | int y = y0; | ||
65 | int err = -adx; | ||
66 | ady -= abs(base) * adx; | ||
67 | while (++x < x1) { | ||
68 | y += base; | ||
69 | err += ady; | ||
70 | if (err >= 0) { | ||
71 | err -= adx; | ||
72 | y += sy; | ||
73 | } | ||
74 | buf[x] = MULT31_SHIFT15(buf[x],lookup[y]); | ||
75 | } | ||
76 | } | ||
77 | } | ||
78 | |||
79 | #ifndef INCL_OPTIMIZED_VECTOR_FMUL_WINDOW | ||
80 | #define INCL_OPTIMIZED_VECTOR_FMUL_WINDOW | ||
81 | static inline void ff_vector_fmul_window_c(ogg_int32_t *dst, const ogg_int32_t *src0, | ||
82 | const ogg_int32_t *src1, const ogg_int32_t *win, int len){ | ||
83 | int i,j; | ||
84 | dst += len; | ||
85 | win += len; | ||
86 | src0+= len; | ||
87 | for(i=-len, j=len-1; i<0; i++, j--) { | ||
88 | ogg_int32_t s0 = src0[i]; | ||
89 | ogg_int32_t s1 = src1[j]; | ||
90 | ogg_int32_t wi = win[i]; | ||
91 | ogg_int32_t wj = win[j]; | ||
92 | XNPROD31(s0, s1, wj, wi, &dst[i], &dst[j]); | ||
93 | /* | ||
94 | dst[i] = MULT31(s0,wj) - MULT31(s1,wi); | ||
95 | dst[j] = MULT31(s0,wi) + MULT31(s1,wj); | ||
96 | */ | ||
97 | } | ||
98 | } | ||
99 | #endif | ||
100 | |||
101 | static inline void copy_normalize(ogg_int32_t *dst, ogg_int32_t *src, int len) | ||
102 | { | ||
103 | memcpy(dst, src, len * sizeof(ogg_int32_t)); | ||
104 | } | ||
105 | |||
106 | static inline void window_overlap_add(unsigned int blocksize, unsigned int lastblock, | ||
107 | unsigned int bs0, unsigned int bs1, int ch, | ||
108 | const ogg_int32_t *win, vorbis_dsp_state *v) | ||
109 | { | ||
110 | unsigned retlen = (blocksize + lastblock) / 4; | ||
111 | int j; | ||
112 | for (j = 0; j < ch; j++) { | ||
113 | ogg_int32_t *residue = v->residues[v->ri] + j * blocksize / 2; | ||
114 | ogg_int32_t *saved = v->saved_ptr[j]; | ||
115 | ogg_int32_t *ret = v->floors + j * retlen; | ||
116 | ogg_int32_t *buf = residue; | ||
117 | |||
118 | if (v->W == v->lW) { | ||
119 | ff_vector_fmul_window_c(ret, saved, buf, win, blocksize / 4); | ||
120 | } else if (v->W > v->lW) { | ||
121 | ff_vector_fmul_window_c(ret, saved, buf, win, bs0 / 4); | ||
122 | copy_normalize(ret+bs0/2, buf+bs0/4, (bs1-bs0)/4); | ||
123 | } else { | ||
124 | copy_normalize(ret, saved, (bs1 - bs0) / 4); | ||
125 | ff_vector_fmul_window_c(ret + (bs1 - bs0) / 4, saved + (bs1 - bs0) / 4, buf, win, bs0 / 4); | ||
126 | } | ||
127 | if (v->residues[1] == NULL) { | ||
128 | memcpy(saved, buf + blocksize / 4, blocksize / 4 * sizeof(ogg_int32_t)); | ||
129 | v->saved_ptr[j] = v->saved + j * bs1 / 4; | ||
130 | } else { | ||
131 | v->saved_ptr[j] = buf + blocksize / 4; | ||
132 | } | ||
133 | |||
134 | v->pcmb[j] = ret; | ||
135 | } | ||
136 | |||
137 | if (v->residues[1] != NULL) { | ||
138 | v->ri ^= 1; | ||
139 | } | ||
140 | } | ||