FFmpeg: libavcodec/dct32_template.c Source File

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dct32_template.c

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1 /*

2 * Template for the Discrete Cosine Transform for 32 samples

4 *

5 * This file is part of FFmpeg.

6 *

7 * FFmpeg is free software; you can redistribute it and/or

8 * modify it under the terms of the GNU Lesser General Public

9 * License as published by the Free Software Foundation; either

10 * version 2.1 of the License, or (at your option) any later version.

11 *

12 * FFmpeg is distributed in the hope that it will be useful,

13 * but WITHOUT ANY WARRANTY; without even the implied warranty of

14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

15 * Lesser General Public License for more details.

16 *

17 * You should have received a copy of the GNU Lesser General Public

18 * License along with FFmpeg; if not, write to the Free Software

19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

20 */

22 #include "dct32.h"

23 #include "mathops.h"

24 #include "libavutil/internal.h"

26 #ifdef CHECKED

27 #define SUINT int

28 #define SUINT32 int32_t

29 #else

30 #define SUINT unsigned

31 #define SUINT32 uint32_t

32 #endif

34 #if DCT32_FLOAT

35 # define dct32 ff_dct32_float

36 # define FIXHR(x) ((float)(x))

37 # define MULH3(x, y, s) ((s)*(y)*(x))

38 # define INTFLOAT float

39 # define SUINTFLOAT float

40 #else

41 # define dct32 ff_dct32_fixed

42 # define FIXHR(a) ((int)((a) * (1LL<<32) + 0.5))

43 # define MULH3(x, y, s) MULH((s)*(x), y)

44 # define INTFLOAT int

45 # define SUINTFLOAT SUINT

46 #endif

49 /* tab[i][j] = 1.0 / (2.0 * cos(pi*(2*k+1) / 2^(6 - j))) */

51 /* cos(i*pi/64) */

53 #define COS0_0 FIXHR(0.50060299823519630134/2)

54 #define COS0_1 FIXHR(0.50547095989754365998/2)

55 #define COS0_2 FIXHR(0.51544730992262454697/2)

56 #define COS0_3 FIXHR(0.53104259108978417447/2)

57 #define COS0_4 FIXHR(0.55310389603444452782/2)

58 #define COS0_5 FIXHR(0.58293496820613387367/2)

59 #define COS0_6 FIXHR(0.62250412303566481615/2)

60 #define COS0_7 FIXHR(0.67480834145500574602/2)

61 #define COS0_8 FIXHR(0.74453627100229844977/2)

62 #define COS0_9 FIXHR(0.83934964541552703873/2)

63 #define COS0_10 FIXHR(0.97256823786196069369/2)

64 #define COS0_11 FIXHR(1.16943993343288495515/4)

65 #define COS0_12 FIXHR(1.48416461631416627724/4)

66 #define COS0_13 FIXHR(2.05778100995341155085/8)

67 #define COS0_14 FIXHR(3.40760841846871878570/8)

68 #define COS0_15 FIXHR(10.19000812354805681150/32)

70 #define COS1_0 FIXHR(0.50241928618815570551/2)

71 #define COS1_1 FIXHR(0.52249861493968888062/2)

72 #define COS1_2 FIXHR(0.56694403481635770368/2)

73 #define COS1_3 FIXHR(0.64682178335999012954/2)

74 #define COS1_4 FIXHR(0.78815462345125022473/2)

75 #define COS1_5 FIXHR(1.06067768599034747134/4)

76 #define COS1_6 FIXHR(1.72244709823833392782/4)

77 #define COS1_7 FIXHR(5.10114861868916385802/16)

79 #define COS2_0 FIXHR(0.50979557910415916894/2)

80 #define COS2_1 FIXHR(0.60134488693504528054/2)

81 #define COS2_2 FIXHR(0.89997622313641570463/2)

82 #define COS2_3 FIXHR(2.56291544774150617881/8)

84 #define COS3_0 FIXHR(0.54119610014619698439/2)

85 #define COS3_1 FIXHR(1.30656296487637652785/4)

87 #define COS4_0 FIXHR(M_SQRT1_2/2)

89 /* butterfly operator */

90 #define BF(a, b, c, s)\

91 {\

92 tmp0 = val##a + val##b;\

93 tmp1 = val##a - val##b;\

94 val##a = tmp0;\

95 val##b = MULH3(tmp1, c, 1<<(s));\

96 }

98 #define BF0(a, b, c, s)\

99 {\

100 tmp0 = tab[a] + tab[b];\

101 tmp1 = tab[a] - tab[b];\

102 val##a = tmp0;\

103 val##b = MULH3(tmp1, c, 1<<(s));\

104 }

105

106 #define BF1(a, b, c, d)\

107 {\

108 BF(a, b, COS4_0, 1);\

109 BF(c, d,-COS4_0, 1);\

110 val##c += val##d;\

111 }

112

113 #define BF2(a, b, c, d)\

114 {\

115 BF(a, b, COS4_0, 1);\

116 BF(c, d,-COS4_0, 1);\

117 val##c += val##d;\

118 val##a += val##c;\

119 val##c += val##b;\

120 val##b += val##d;\

121 }

122

123 #define ADD(a, b) val##a += val##b

124

125 /* DCT32 without 1/sqrt(2) coef zero scaling. */

126 void dct32(INTFLOAT *out, const INTFLOAT *tab_arg)

127 {

128 const SUINTFLOAT *tab = tab_arg;

129 SUINTFLOAT tmp0, tmp1;

130

131 SUINTFLOAT val0 , val1 , val2 , val3 , val4 , val5 , val6 , val7 ,

132 val8 , val9 , val10, val11, val12, val13, val14, val15,

133 val16, val17, val18, val19, val20, val21, val22, val23,

134 val24, val25, val26, val27, val28, val29, val30, val31;

135

136 /* pass 1 */

137 BF0( 0, 31, COS0_0 , 1);

138 BF0(15, 16, COS0_15, 5);

139 /* pass 2 */

140 BF( 0, 15, COS1_0 , 1);

141 BF(16, 31,-COS1_0 , 1);

142 /* pass 1 */

143 BF0( 7, 24, COS0_7 , 1);

144 BF0( 8, 23, COS0_8 , 1);

145 /* pass 2 */

146 BF( 7, 8, COS1_7 , 4);

147 BF(23, 24,-COS1_7 , 4);

148 /* pass 3 */

149 BF( 0, 7, COS2_0 , 1);

150 BF( 8, 15,-COS2_0 , 1);

151 BF(16, 23, COS2_0 , 1);

152 BF(24, 31,-COS2_0 , 1);

153 /* pass 1 */

154 BF0( 3, 28, COS0_3 , 1);

155 BF0(12, 19, COS0_12, 2);

156 /* pass 2 */

157 BF( 3, 12, COS1_3 , 1);

158 BF(19, 28,-COS1_3 , 1);

159 /* pass 1 */

160 BF0( 4, 27, COS0_4 , 1);

161 BF0(11, 20, COS0_11, 2);

162 /* pass 2 */

163 BF( 4, 11, COS1_4 , 1);

164 BF(20, 27,-COS1_4 , 1);

165 /* pass 3 */

166 BF( 3, 4, COS2_3 , 3);

167 BF(11, 12,-COS2_3 , 3);

168 BF(19, 20, COS2_3 , 3);

169 BF(27, 28,-COS2_3 , 3);

170 /* pass 4 */

171 BF( 0, 3, COS3_0 , 1);

172 BF( 4, 7,-COS3_0 , 1);

173 BF( 8, 11, COS3_0 , 1);

174 BF(12, 15,-COS3_0 , 1);

175 BF(16, 19, COS3_0 , 1);

176 BF(20, 23,-COS3_0 , 1);

177 BF(24, 27, COS3_0 , 1);

178 BF(28, 31,-COS3_0 , 1);

179

180

181

182 /* pass 1 */

183 BF0( 1, 30, COS0_1 , 1);

184 BF0(14, 17, COS0_14, 3);

185 /* pass 2 */

186 BF( 1, 14, COS1_1 , 1);

187 BF(17, 30,-COS1_1 , 1);

188 /* pass 1 */

189 BF0( 6, 25, COS0_6 , 1);

190 BF0( 9, 22, COS0_9 , 1);

191 /* pass 2 */

192 BF( 6, 9, COS1_6 , 2);

193 BF(22, 25,-COS1_6 , 2);

194 /* pass 3 */

195 BF( 1, 6, COS2_1 , 1);

196 BF( 9, 14,-COS2_1 , 1);

197 BF(17, 22, COS2_1 , 1);

198 BF(25, 30,-COS2_1 , 1);

199

200 /* pass 1 */

201 BF0( 2, 29, COS0_2 , 1);

202 BF0(13, 18, COS0_13, 3);

203 /* pass 2 */

204 BF( 2, 13, COS1_2 , 1);

205 BF(18, 29,-COS1_2 , 1);

206 /* pass 1 */

207 BF0( 5, 26, COS0_5 , 1);

208 BF0(10, 21, COS0_10, 1);

209 /* pass 2 */

210 BF( 5, 10, COS1_5 , 2);

211 BF(21, 26,-COS1_5 , 2);

212 /* pass 3 */

213 BF( 2, 5, COS2_2 , 1);

214 BF(10, 13,-COS2_2 , 1);

215 BF(18, 21, COS2_2 , 1);

216 BF(26, 29,-COS2_2 , 1);

217 /* pass 4 */

218 BF( 1, 2, COS3_1 , 2);

219 BF( 5, 6,-COS3_1 , 2);

220 BF( 9, 10, COS3_1 , 2);

221 BF(13, 14,-COS3_1 , 2);

222 BF(17, 18, COS3_1 , 2);

223 BF(21, 22,-COS3_1 , 2);

224 BF(25, 26, COS3_1 , 2);

225 BF(29, 30,-COS3_1 , 2);

226

227 /* pass 5 */

228 BF1( 0, 1, 2, 3);

229 BF2( 4, 5, 6, 7);

230 BF1( 8, 9, 10, 11);

231 BF2(12, 13, 14, 15);

232 BF1(16, 17, 18, 19);

233 BF2(20, 21, 22, 23);

234 BF1(24, 25, 26, 27);

235 BF2(28, 29, 30, 31);

236

237 /* pass 6 */

238

239 ADD( 8, 12);

240 ADD(12, 10);

241 ADD(10, 14);

242 ADD(14, 9);

243 ADD( 9, 13);

244 ADD(13, 11);

245 ADD(11, 15);

246

247 out[ 0] = val0;

248 out[16] = val1;

249 out[ 8] = val2;

250 out[24] = val3;

251 out[ 4] = val4;

252 out[20] = val5;

253 out[12] = val6;

254 out[28] = val7;

255 out[ 2] = val8;

256 out[18] = val9;

257 out[10] = val10;

258 out[26] = val11;

259 out[ 6] = val12;

260 out[22] = val13;

261 out[14] = val14;

262 out[30] = val15;

263

264 ADD(24, 28);

265 ADD(28, 26);

266 ADD(26, 30);

267 ADD(30, 25);

268 ADD(25, 29);

269 ADD(29, 27);

270 ADD(27, 31);

271

272 out[ 1] = val16 + val24;

273 out[17] = val17 + val25;

274 out[ 9] = val18 + val26;

275 out[25] = val19 + val27;

276 out[ 5] = val20 + val28;

277 out[21] = val21 + val29;

278 out[13] = val22 + val30;

279 out[29] = val23 + val31;

280 out[ 3] = val24 + val20;

281 out[19] = val25 + val21;

282 out[11] = val26 + val22;

283 out[27] = val27 + val23;

284 out[ 7] = val28 + val18;

285 out[23] = val29 + val19;

286 out[15] = val30 + val17;

287 out[31] = val31;

288 }

out

FILE * out

Definition: movenc.c:55

COS1_0

#define COS1_0

Definition: dct32_template.c:70

COS0_12

#define COS0_12

Definition: dct32_template.c:65

COS0_2

#define COS0_2

Definition: dct32_template.c:55

COS1_7

#define COS1_7

Definition: dct32_template.c:77

COS1_6

#define COS1_6

Definition: dct32_template.c:76

tab

static const struct twinvq_data tab

Definition: twinvq_data.h:10345

COS3_0

#define COS3_0

Definition: dct32_template.c:84

COS1_5

#define COS1_5

Definition: dct32_template.c:75

COS0_10

#define COS0_10

Definition: dct32_template.c:63

COS0_7

#define COS0_7

Definition: dct32_template.c:60

COS1_3

#define COS1_3

Definition: dct32_template.c:73

COS1_1

#define COS1_1

Definition: dct32_template.c:71

ADD

#define ADD(a, b)

Definition: dct32_template.c:123

COS0_4

#define COS0_4

Definition: dct32_template.c:57

mathops.h

dct32.h

COS0_11

#define COS0_11

Definition: dct32_template.c:64

COS0_1

#define COS0_1

Definition: dct32_template.c:54

COS1_2

#define COS1_2

Definition: dct32_template.c:72

#define BF(a, b, c, s)

Definition: dct32_template.c:90

COS0_5

#define COS0_5

Definition: dct32_template.c:58

internal.h

COS3_1

#define COS3_1

Definition: dct32_template.c:85

COS0_13

#define COS0_13

Definition: dct32_template.c:66

COS0_3

#define COS0_3

Definition: dct32_template.c:56

BF1

#define BF1(a, b, c, d)

Definition: dct32_template.c:106

COS0_14

#define COS0_14

Definition: dct32_template.c:67

COS2_0

#define COS2_0

Definition: dct32_template.c:79

BF0

#define BF0(a, b, c, s)

Definition: dct32_template.c:98

COS2_3

#define COS2_3

Definition: dct32_template.c:82

COS0_15

#define COS0_15

Definition: dct32_template.c:68

COS1_4

#define COS1_4

Definition: dct32_template.c:74

dct32

#define dct32

Definition: dct32_template.c:41

COS0_6

#define COS0_6

Definition: dct32_template.c:59

SUINTFLOAT

#define SUINTFLOAT

Definition: dct32_template.c:45

COS2_1

#define COS2_1

Definition: dct32_template.c:80

COS2_2

#define COS2_2

Definition: dct32_template.c:81

COS0_0

#define COS0_0

Definition: dct32_template.c:53

COS0_9

#define COS0_9

Definition: dct32_template.c:62

BF2

#define BF2(a, b, c, d)

Definition: dct32_template.c:113

INTFLOAT

float INTFLOAT

Definition: aac_defines.h:101

COS0_8

#define COS0_8

Definition: dct32_template.c:61

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