author | kergoth <kergoth> | 2002-01-25 22:14:26 (UTC) |
---|---|---|
committer | kergoth <kergoth> | 2002-01-25 22:14:26 (UTC) |
commit | 15318cad33835e4e2dc620d033e43cd930676cdd (patch) (unidiff) | |
tree | c2fa0399a2c47fda8e2cd0092c73a809d17f68eb /core/multimedia/opieplayer/libmpeg3/audio/synthesizers.c | |
download | opie-15318cad33835e4e2dc620d033e43cd930676cdd.zip opie-15318cad33835e4e2dc620d033e43cd930676cdd.tar.gz opie-15318cad33835e4e2dc620d033e43cd930676cdd.tar.bz2 |
Initial revision
Diffstat (limited to 'core/multimedia/opieplayer/libmpeg3/audio/synthesizers.c') (more/less context) (show whitespace changes)
-rw-r--r-- | core/multimedia/opieplayer/libmpeg3/audio/synthesizers.c | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/core/multimedia/opieplayer/libmpeg3/audio/synthesizers.c b/core/multimedia/opieplayer/libmpeg3/audio/synthesizers.c new file mode 100644 index 0000000..71a74b3 --- a/dev/null +++ b/core/multimedia/opieplayer/libmpeg3/audio/synthesizers.c | |||
@@ -0,0 +1,174 @@ | |||
1 | #include "mpeg3audio.h" | ||
2 | #include "../libmpeg3.h" | ||
3 | #include "../mpeg3protos.h" | ||
4 | #include "tables.h" | ||
5 | |||
6 | #define WRITE_SAMPLE(samples, sum) \ | ||
7 | { \ | ||
8 | (*samples) = (sum); \ | ||
9 | } | ||
10 | |||
11 | int mpeg3audio_synth_stereo(mpeg3audio_t *audio, mpeg3_real_t *bandPtr, int channel, mpeg3_real_t *out, int *pnt) | ||
12 | { | ||
13 | const int step = 2; | ||
14 | mpeg3_real_t *samples = out + *pnt; | ||
15 | register mpeg3_real_t sum; | ||
16 | mpeg3_real_t *b0, (*buf)[0x110]; | ||
17 | int bo1; | ||
18 | |||
19 | if(!channel) | ||
20 | { | ||
21 | audio->bo--; | ||
22 | audio->bo &= 0xf; | ||
23 | buf = audio->synth_stereo_buffs[0]; | ||
24 | } | ||
25 | else | ||
26 | { | ||
27 | samples++; | ||
28 | buf = audio->synth_stereo_buffs[1]; | ||
29 | } | ||
30 | |||
31 | if(audio->bo & 0x1) | ||
32 | { | ||
33 | b0 = buf[0]; | ||
34 | bo1 = audio->bo; | ||
35 | mpeg3audio_dct64(buf[1] + ((audio->bo + 1) & 0xf), buf[0] + audio->bo, bandPtr); | ||
36 | } | ||
37 | else | ||
38 | { | ||
39 | b0 = buf[1]; | ||
40 | bo1 = audio->bo + 1; | ||
41 | mpeg3audio_dct64(buf[0] + audio->bo, buf[1] + audio->bo + 1, bandPtr); | ||
42 | } | ||
43 | |||
44 | /*printf("%f %f %f\n", buf[0][0], buf[1][0], bandPtr[0]); */ | ||
45 | |||
46 | { | ||
47 | register int j; | ||
48 | mpeg3_real_t *window = mpeg3_decwin + 16 - bo1; | ||
49 | |||
50 | for(j = 16; j; j--, b0 += 0x10, window += 0x20, samples += step) | ||
51 | { | ||
52 | sum = window[0x0] * b0[0x0]; | ||
53 | sum -= window[0x1] * b0[0x1]; | ||
54 | sum += window[0x2] * b0[0x2]; | ||
55 | sum -= window[0x3] * b0[0x3]; | ||
56 | sum += window[0x4] * b0[0x4]; | ||
57 | sum -= window[0x5] * b0[0x5]; | ||
58 | sum += window[0x6] * b0[0x6]; | ||
59 | sum -= window[0x7] * b0[0x7]; | ||
60 | sum += window[0x8] * b0[0x8]; | ||
61 | sum -= window[0x9] * b0[0x9]; | ||
62 | sum += window[0xA] * b0[0xA]; | ||
63 | sum -= window[0xB] * b0[0xB]; | ||
64 | sum += window[0xC] * b0[0xC]; | ||
65 | sum -= window[0xD] * b0[0xD]; | ||
66 | sum += window[0xE] * b0[0xE]; | ||
67 | sum -= window[0xF] * b0[0xF]; | ||
68 | |||
69 | WRITE_SAMPLE(samples, sum); | ||
70 | } | ||
71 | |||
72 | sum = window[0x0] * b0[0x0]; | ||
73 | sum += window[0x2] * b0[0x2]; | ||
74 | sum += window[0x4] * b0[0x4]; | ||
75 | sum += window[0x6] * b0[0x6]; | ||
76 | sum += window[0x8] * b0[0x8]; | ||
77 | sum += window[0xA] * b0[0xA]; | ||
78 | sum += window[0xC] * b0[0xC]; | ||
79 | sum += window[0xE] * b0[0xE]; | ||
80 | WRITE_SAMPLE(samples, sum); | ||
81 | b0 -= 0x10; | ||
82 | window -= 0x20; | ||
83 | samples += step; | ||
84 | window += bo1 << 1; | ||
85 | |||
86 | for(j = 15; j; j--, b0 -= 0x10, window -= 0x20, samples += step) | ||
87 | { | ||
88 | sum = -window[-0x1] * b0[0x0]; | ||
89 | sum -= window[-0x2] * b0[0x1]; | ||
90 | sum -= window[-0x3] * b0[0x2]; | ||
91 | sum -= window[-0x4] * b0[0x3]; | ||
92 | sum -= window[-0x5] * b0[0x4]; | ||
93 | sum -= window[-0x6] * b0[0x5]; | ||
94 | sum -= window[-0x7] * b0[0x6]; | ||
95 | sum -= window[-0x8] * b0[0x7]; | ||
96 | sum -= window[-0x9] * b0[0x8]; | ||
97 | sum -= window[-0xA] * b0[0x9]; | ||
98 | sum -= window[-0xB] * b0[0xA]; | ||
99 | sum -= window[-0xC] * b0[0xB]; | ||
100 | sum -= window[-0xD] * b0[0xC]; | ||
101 | sum -= window[-0xE] * b0[0xD]; | ||
102 | sum -= window[-0xF] * b0[0xE]; | ||
103 | sum -= window[-0x0] * b0[0xF]; | ||
104 | |||
105 | WRITE_SAMPLE(samples, sum); | ||
106 | } | ||
107 | } | ||
108 | *pnt += 64; | ||
109 | |||
110 | return 0; | ||
111 | } | ||
112 | |||
113 | int mpeg3audio_synth_mono(mpeg3audio_t *audio, mpeg3_real_t *bandPtr, mpeg3_real_t *samples, int *pnt) | ||
114 | { | ||
115 | mpeg3_real_t *samples_tmp = audio->synth_mono_buff; | ||
116 | mpeg3_real_t *tmp1 = samples_tmp; | ||
117 | int i, ret; | ||
118 | int pnt1 = 0; | ||
119 | |||
120 | ret = mpeg3audio_synth_stereo(audio, bandPtr, 0, samples_tmp, &pnt1); | ||
121 | samples += *pnt; | ||
122 | |||
123 | for(i = 0; i < 32; i++) | ||
124 | { | ||
125 | *samples = *tmp1; | ||
126 | samples++; | ||
127 | tmp1 += 2; | ||
128 | } | ||
129 | *pnt += 32; | ||
130 | |||
131 | return ret; | ||
132 | } | ||
133 | |||
134 | |||
135 | /* Call this after every seek to reset the buffers */ | ||
136 | int mpeg3audio_reset_synths(mpeg3audio_t *audio) | ||
137 | { | ||
138 | int i, j, k; | ||
139 | for(i = 0; i < 2; i++) | ||
140 | { | ||
141 | for(j = 0; j < 2; j++) | ||
142 | { | ||
143 | for(k = 0; k < 0x110; k++) | ||
144 | { | ||
145 | audio->synth_stereo_buffs[i][j][k] = 0; | ||
146 | } | ||
147 | } | ||
148 | } | ||
149 | for(i = 0; i < 64; i++) | ||
150 | { | ||
151 | audio->synth_mono_buff[i] = 0; | ||
152 | audio->layer2_scfsi_buf[i] = 0; | ||
153 | } | ||
154 | for(i = 0; i < 2; i++) | ||
155 | { | ||
156 | for(j = 0; j < 2; j++) | ||
157 | { | ||
158 | for(k = 0; k < SBLIMIT * SSLIMIT; k++) | ||
159 | { | ||
160 | audio->mp3_block[i][j][k] = 0; | ||
161 | } | ||
162 | } | ||
163 | } | ||
164 | audio->mp3_blc[0] = 0; | ||
165 | audio->mp3_blc[1] = 0; | ||
166 | for(i = 0; i < audio->channels; i++) | ||
167 | { | ||
168 | for(j = 0; j < AC3_N / 2; j++) | ||
169 | { | ||
170 | audio->ac3_delay[i][j] = 0; | ||
171 | } | ||
172 | } | ||
173 | return 0; | ||
174 | } | ||