~ubuntu-branches/ubuntu/oneiric/xmp/oneiric

Viewing changes to docs/formats/samples.txt

Committer: Bazaar Package Importer
Author(s): Artur Rona
Date: 2010-01-15 01:15:22 UTC
mfrom: (1.1.8 upstream) (4.2.3 squeeze)
Revision ID: james.westby@ubuntu.com-20100115011522-r4otlsg687ee1yx4

Tags: 3.0.0+20090923-1ubuntu1

* Merge from debian testing (LP: #507732).  Reamining changes:
  + Add PulseAudio support:
    - debian/rules: Add --enable-pulseaudio to ./configure
  + RFE Compile with 128 bit mixer:
    - dpatch support

files added:
Makefile.rules

debian/patches/01-rfe_compile_128bit.dpatch

depend

docs/formats/Soundtracker-Samplefiles.txt

docs/formats/d00.txt

docs/formats/it_samples.txt

docs/formats/j2b_format.txt

mod.syfuid.long

src/drivers/smix.c

src/include/config.h

src/loaders/gal4_load.c

src/loaders/gal5_load.c

src/main/drivers.c

src/misc/inflate.c

src/misc/muse.c

src/misc/unlzx.c

src/player/smix.h

src/plugin/tunenet

src/plugin/tunenet/AnnouncePlayer.c

src/plugin/tunenet/ClosePlayer.c

src/plugin/tunenet/DecodeFramePlayer.c

src/plugin/tunenet/DoNotify.c

src/plugin/tunenet/ExitPlayer.c

src/plugin/tunenet/Init.c

src/plugin/tunenet/InitPlayer.c

src/plugin/tunenet/Makefile

src/plugin/tunenet/Obtain.c

src/plugin/tunenet/OpenPlayer.c

src/plugin/tunenet/Release.c

src/plugin/tunenet/SeekPlayer.c

src/plugin/tunenet/TestPlayer.c

src/plugin/tunenet/Vectors.cpp

src/plugin/tunenet/include

src/plugin/tunenet/include/LibBase.h

src/plugin/tunenet/include/TNPlug.xml

src/plugin/tunenet/include/TN_XMP.tnplug_rev.h

src/plugin/tunenet/include/TN_XMP.tnplug_rev.h.in

src/plugin/tunenet/include/inline4

src/plugin/tunenet/include/inline4/TNPlug.h

src/plugin/tunenet/include/interfaces

src/plugin/tunenet/include/interfaces/TNPlug.h

src/plugin/tunenet/include/libraries

src/plugin/tunenet/include/libraries/TNPlug.h

src/plugin/tunenet/include/proto

src/plugin/tunenet/include/proto/TNPlug.h

src/win32/in_xmp.dsp.in

src/win32/xmp.dsp.in

files removed:
among the stars.xm

debian/patches/01-xmp-audacious-extension-mappings.dpatch

debian/patches/02-rfe_compile_128bit.dpatch

docs/formats/samples.txt

lib/Makefile

src/Makefile

src/drivers/callback.c

src/os2

src/os2/Makefile

src/os2/version.c

src/os2/xmp.def

src/os2/xmp2.txt

src/plugin/driver.c

src/win32/libxmp.dsp

src/win32/libxmp.dsw

src/win32/version.c

files modified:
Makefile

Makefile.rules.in

README

configure

configure.in

debian/changelog

debian/control

debian/copyright

debian/patches/00list

debian/rules

docs/CREDITS

docs/ChangeLog

docs/Makefile

docs/README.trackers

docs/formats/Medsynth.txt *

docs/formats/PT-Play_2.1a.s *

docs/formats/PT.Effects_2.1a.txt *

docs/formats/PT.FileFormat_2.1a.txt *

docs/xmp.1

etc/Makefile

etc/xmp.spec

scripts/config.guess

scripts/config.sub

src/drivers/Makefile

src/drivers/aix.c *

src/drivers/alsa.c

src/drivers/alsa05.c

src/drivers/alsa_seq.c

src/drivers/amiga.c

src/drivers/arts.c

src/drivers/beos.c

src/drivers/bsd.c

src/drivers/debug.c

src/drivers/esd.c

src/drivers/file.c

src/drivers/hpux.c

src/drivers/nas.c

src/drivers/netbsd.c

src/drivers/openbsd.c

src/drivers/os2_dart.c

src/drivers/oss.c

src/drivers/oss_seq.c

src/drivers/osx.c

src/drivers/pulseaudio.c

src/drivers/qnx.c

src/drivers/sgi.c

src/drivers/sndio.c

src/drivers/solaris.c

src/drivers/wav.c

src/drivers/win32.c

src/include/Makefile

src/include/common.h

src/include/driver.h

src/include/mixer.h

src/include/period.h

src/include/xmp.h

src/include/xxm.h

src/loaders/669_load.c

src/loaders/Makefile

src/loaders/amf_load.c

src/loaders/fnk_load.c

src/loaders/gdm_load.c

src/loaders/iff.c

src/loaders/iff.h

src/loaders/imf_load.c

src/loaders/it_load.c

src/loaders/masi_load.c

src/loaders/mdl_load.c

src/loaders/med3_load.c

src/loaders/med4_load.c

src/loaders/mmd1_load.c

src/loaders/mmd3_load.c

src/loaders/mod_load.c

src/loaders/prowizard/Makefile

src/loaders/prowizard/mp.c

src/loaders/prowizard/prowiz.c

src/loaders/prowizard/prun1.c

src/loaders/prowizard/tdd.c

src/loaders/rtm_load.c

src/loaders/s3m_load.c

src/loaders/stm_load.c

src/loaders/stx_load.c

src/loaders/xm_load.c

src/main/Makefile

src/main/main.c

src/main/options.c

src/misc/Makefile

src/misc/control.c

src/misc/load.c

src/misc/mmcmp.c

src/misc/ppdepack.c

src/player/Makefile

src/player/driver.c

src/player/effects.c

src/player/fmopl.c

src/player/formats.c

src/player/mixer.c

src/player/period.c

src/player/player.c

src/player/player.h

src/player/readrc.c

src/player/scan.c

src/player/synth.c

src/player/ulaw.c

src/plugin/Makefile

src/plugin/audacious.c

src/plugin/bmp.c

src/plugin/winamp.c

src/plugin/xmms.c

src/win32/Makefile

src/win32/config.h

src/win32/in_xmp.dsp

src/win32/xmp.dsp

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added added

removed removed

docs/formats/samples.txt

How to decompess .IT samples:

Basic structure:

Offset Length Meaning

0 2 (word) <Compressed byte count>

2 <Compressed byte count> Compressed sample data

The size of the uncompressed data is 32kb or the remainder of the sample,

whichever is less.

Code to decompress sample data:

Each procedure is given DS:SI as the compressed buffer, ES:DI points to the

destination buffer for the sample. CX = <Decompressed byte count>

These routines haven't been optimised at all - they are the ones that have

been used in IT itself, so they should be sufficiently fast.

;��

Proc D_Decompress16BitData

PushAD

Mov BP, CX

Mov CX, 1100h

ShR BP, 1

Xor DX, DX

Xor BX, BX

D_Decompress16BitData1:

Push CX

Mov EAX, [SI]

Mov CL, DL

ShR EAX, CL

Add DL, CH

Mov CX, DX

ShR CX, 3

Add SI, CX

And DL, 7

Pop CX

Cmp CH, 6

JA D_Decompress16BitA

ShL EAX, CL

Cmp AX, 8000h

JE D_Decompress16BitDepthChange1

D_Decompress16BitD:

SAR AX, CL

D_Decompress16BitC:

Add BX, AX

Mov [ES:DI], BX

Add DI, 2

Dec BP

JNZ D_Decompress16BitData1

PopAD

Ret

D_Decompress16BitDepthChange1:

ShR EAX, 16

And AL, 15

Inc AX

Add DL, 4

D_Decompress16BitDepthChange3:

Cmp AL, CH

SBB AL, 0FFh

Mov CL, 16

Mov CH, AL

Sub CL, AL

AdC CL, 0

Jmp D_Decompress16BitData1

D_Decompress16BitA:

Cmp CH, 16

JA D_Decompress16BitB

Push DX

Mov EDX, 10000h

ShR EDX, CL

Dec DX

And AX, DX

ShR DX, 1

Add DX, 8

Cmp AX, DX

JA D_Decompress16BitE

Sub DX, 16

100

Cmp AX, DX

101

JBE D_Decompress16BitE

102

103

Sub AX, DX

104

Pop DX

105

Jmp D_Decompress16BitDepthChange3

106

107

D_Decompress16BitE:

108

Pop DX

109

ShL AX, CL

110

Jmp D_Decompress16BitD

111

112

D_Decompress16BitB:

113

Test EAX, 10000h

114

JZ D_Decompress16BitC

115

116

Mov CL, 16

117

Inc AX

118

119

Sub CL, AL

120

Mov CH, AL

121

122

Jmp D_Decompress16BitData1

123

124

EndP D_Decompress16BitData

125

126

;��

127

128

Proc D_Decompress8BitData

129

130

PushA

131

Mov BP, CX

132

133

Mov BX, 900h

134

Xor CX, CX

135

Xor DX, DX

136

137

D_Decompress8BitData1:

138

Push CX

139

Mov AX, [SI]

140

Mov CL, CH

141

142

ShR AX, CL

143

Pop CX

144

145

Add CH, BH

146

Mov DL, CH

147

And CH, 7

148

ShR DL, 3

149

Add SI, DX

150

151

Cmp BH, 6

152

JA D_Decompress8BitA

153

154

ShL AX, CL

155

156

Cmp AL, 80h

157

JE D_Decompress8BitDepthChange1

158

159

D_Decompress8BitWriteData2:

160

SAR AL, CL

161

162

D_Decompress8BitWriteData:

163

Add BL, AL

164

Mov [ES:DI], BL

165

166

Inc DI

167

Dec BP

168

169

JNZ D_Decompress8BitData1

170

PopA

171

Ret

172

173

D_Decompress8BitDepthChange1:

174

Mov AL, AH

175

Add CH, 3

176

177

And AL, 7

178

Mov DL, CH

179

180

And CH, 7

181

ShR DL, 3

182

183

Add SI, DX

184

Jmp D_Decompress8BitD

185

186

D_Decompress8BitA:

187

Cmp BH, 8

188

JA D_Decompress8BitC

189

JE D_Decompress8BitB

190

191

ShL AL, 1

192

Cmp AL, 78h

193

JB D_Decompress8BitWriteData2

194

Cmp AL, 86h

195

JA D_Decompress8BitWriteData2

196

197

ShR AL, 1

198

Sub AL, 3Ch

199

Jmp D_Decompress8BitD

200

201

D_Decompress8BitB:

202

Cmp AL, 7Ch

203

JB D_Decompress8BitWriteData

204

Cmp AL, 83h

205

JA D_Decompress8BitWriteData

206

207

Sub AL, 7Ch

208

209

D_Decompress8BitD:

210

Mov CL, 8

211

Inc AX

212

213

Cmp AL, BH

214

SBB AL, 0FFh

215

Mov BH, AL

216

Sub CL, AL

217

AdC CL, 0

218

219

Jmp D_Decompress8BitData1

220

221

D_Decompress8BitC:

222

And AX, 1FFh

223

224

Test AX, 100h

225

JZ D_Decompress8BitWriteData

226

227

Jmp D_Decompress8BitD

228

229

EndP D_Decompress8BitData

230

231

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