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annotate Lib/sunau.py @ 4566:6403c94de50d legacy-trunk

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Added safeguard against failure in __del__.
author Guido van Rossum <guido@python.org>
date Wed, 27 Nov 1996 19:39:58 +0000
parents 18451dca9469
children 8b49c918a25f
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 # Stuff to parse Sun and NeXT audio files.
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2 #
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3 # An audio consists of a header followed by the data. The structure
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4 # of the header is as follows.
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5 #
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6 # +---------------+
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7 # | magic word |
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8 # +---------------+
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9 # | header size |
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10 # +---------------+
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11 # | data size |
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12 # +---------------+
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13 # | encoding |
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14 # +---------------+
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15 # | sample rate |
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16 # +---------------+
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17 # | # of channels |
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18 # +---------------+
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19 # | info |
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20 # | |
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21 # +---------------+
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22 #
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23 # The magic word consists of the 4 characters '.snd'. Apart from the
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24 # info field, all header fields are 4 bytes in size. They are all
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25 # 32-bit unsigned integers encoded in big-endian byte order.
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26 #
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27 # The header size really gives the start of the data.
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28 # The data size is the physical size of the data. From the other
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29 # parameter the number of frames can be calculated.
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30 # The encoding gives the way in which audio samples are encoded.
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31 # Possible values are listed below.
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32 # The info field currently consists of an ASCII string giving a
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33 # human-readable description of the audio file. The info field is
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34 # padded with NUL bytes to the header size.
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35 #
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36 # Usage.
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37 #
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38 # Reading audio files:
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39 # f = sunau.open(file, 'r')
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40 # where file is either the name of a file or an open file pointer.
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41 # The open file pointer must have methods read(), seek(), and close().
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42 # When the setpos() and rewind() methods are not used, the seek()
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43 # method is not necessary.
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44 #
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45 # This returns an instance of a class with the following public methods:
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46 # getnchannels() -- returns number of audio channels (1 for
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47 # mono, 2 for stereo)
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48 # getsampwidth() -- returns sample width in bytes
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49 # getframerate() -- returns sampling frequency
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50 # getnframes() -- returns number of audio frames
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51 # getcomptype() -- returns compression type ('NONE' for AIFF files)
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52 # getcompname() -- returns human-readable version of
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53 # compression type ('not compressed' for AIFF files)
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54 # getparams() -- returns a tuple consisting of all of the
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55 # above in the above order
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56 # getmarkers() -- returns None (for compatibility with the
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57 # aifc module)
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58 # getmark(id) -- raises an error since the mark does not
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59 # exist (for compatibility with the aifc module)
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60 # readframes(n) -- returns at most n frames of audio
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61 # rewind() -- rewind to the beginning of the audio stream
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62 # setpos(pos) -- seek to the specified position
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63 # tell() -- return the current position
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64 # close() -- close the instance (make it unusable)
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65 # The position returned by tell() and the position given to setpos()
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66 # are compatible and have nothing to do with the actual postion in the
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67 # file.
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68 # The close() method is called automatically when the class instance
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69 # is destroyed.
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70 #
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71 # Writing audio files:
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72 # f = sunau.open(file, 'w')
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73 # where file is either the name of a file or an open file pointer.
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74 # The open file pointer must have methods write(), tell(), seek(), and
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75 # close().
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76 #
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77 # This returns an instance of a class with the following public methods:
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78 # setnchannels(n) -- set the number of channels
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79 # setsampwidth(n) -- set the sample width
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80 # setframerate(n) -- set the frame rate
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81 # setnframes(n) -- set the number of frames
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82 # setcomptype(type, name)
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83 # -- set the compression type and the
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84 # human-readable compression type
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85 # setparams(nchannels, sampwidth, framerate, nframes, comptype, compname)
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86 # -- set all parameters at once
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87 # tell() -- return current position in output file
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88 # writeframesraw(data)
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89 # -- write audio frames without pathing up the
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90 # file header
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91 # writeframes(data)
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92 # -- write audio frames and patch up the file header
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93 # close() -- patch up the file header and close the
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94 # output file
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95 # You should set the parameters before the first writeframesraw or
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96 # writeframes. The total number of frames does not need to be set,
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97 # but when it is set to the correct value, the header does not have to
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98 # be patched up.
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99 # It is best to first set all parameters, perhaps possibly the
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100 # compression type, and then write audio frames using writeframesraw.
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101 # When all frames have been written, either call writeframes('') or
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102 # close() to patch up the sizes in the header.
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103 # The close() method is called automatically when the class instance
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104 # is destroyed.
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105
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106 # from <multimedia/audio_filehdr.h>
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107 AUDIO_FILE_MAGIC = 0x2e736e64
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108 AUDIO_FILE_ENCODING_MULAW_8 = 1
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109 AUDIO_FILE_ENCODING_LINEAR_8 = 2
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110 AUDIO_FILE_ENCODING_LINEAR_16 = 3
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111 AUDIO_FILE_ENCODING_LINEAR_24 = 4
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112 AUDIO_FILE_ENCODING_LINEAR_32 = 5
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113 AUDIO_FILE_ENCODING_FLOAT = 6
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114 AUDIO_FILE_ENCODING_DOUBLE = 7
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115 AUDIO_FILE_ENCODING_ADPCM_G721 = 23
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116 AUDIO_FILE_ENCODING_ADPCM_G722 = 24
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117 AUDIO_FILE_ENCODING_ADPCM_G723_3 = 25
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118 AUDIO_FILE_ENCODING_ADPCM_G723_5 = 26
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119 AUDIO_FILE_ENCODING_ALAW_8 = 27
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120
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121 # from <multimedia/audio_hdr.h>
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122 AUDIO_UNKNOWN_SIZE = 0xFFFFFFFFL # ((unsigned)(~0))
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123
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124 _simple_encodings = [AUDIO_FILE_ENCODING_MULAW_8,
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125 AUDIO_FILE_ENCODING_LINEAR_8,
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126 AUDIO_FILE_ENCODING_LINEAR_16,
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127 AUDIO_FILE_ENCODING_LINEAR_24,
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diff changeset
128 AUDIO_FILE_ENCODING_LINEAR_32,
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129 AUDIO_FILE_ENCODING_ALAW_8]
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130
2971
d23d73b4e58a Temporary fix for access statement.
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parents: 1542
diff changeset
131 Error = 'sunau.Error'
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132
1419
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133 def _read_u32(file):
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diff changeset
134 x = 0L
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diff changeset
135 for i in range(4):
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parents:
diff changeset
136 byte = file.read(1)
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parents:
diff changeset
137 if byte == '':
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Sjoerd Mullender <sjoerd@acm.org>
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diff changeset
138 raise EOFError
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parents:
diff changeset
139 x = x*256 + ord(byte)
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diff changeset
140 return x
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141
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
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diff changeset
142 def _write_u32(file, x):
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parents:
diff changeset
143 data = []
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144 for i in range(4):
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diff changeset
145 d, m = divmod(x, 256)
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diff changeset
146 data.insert(0, m)
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diff changeset
147 x = d
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148 for i in range(4):
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149 file.write(chr(int(data[i])))
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150
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
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151 class Au_read:
4078
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152 ## access _file, _soundpos, _hdr_size, _data_size, _encoding, \
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153 ## _sampwidth, _framesize, _framerate, _nchannels, \
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154 ## _info: private
1437
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155
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156 def __init__(self, f):
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157 if type(f) == type(''):
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4047f224efdb Use __builtin__ instead of builtin
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diff changeset
158 import __builtin__
4047f224efdb Use __builtin__ instead of builtin
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diff changeset
159 f = __builtin__.open(f, 'r')
1437
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160 self.initfp(f)
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161
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diff changeset
162 def __del__(self):
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parents: 1435
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163 if self._file:
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164 self.close()
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165
1419
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166 def initfp(self, file):
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167 self._file = file
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168 self._soundpos = 0
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169 magic = int(_read_u32(file))
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170 if magic != AUDIO_FILE_MAGIC:
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parents:
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171 raise Error, 'bad magic number'
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172 self._hdr_size = int(_read_u32(file))
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173 if self._hdr_size < 24:
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Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
174 raise Error, 'header size too small'
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parents:
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175 if self._hdr_size > 100:
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Sjoerd Mullender <sjoerd@acm.org>
parents:
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176 raise Error, 'header size rediculously large'
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Sjoerd Mullender <sjoerd@acm.org>
parents:
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177 self._data_size = _read_u32(file)
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178 if self._data_size != AUDIO_UNKNOWN_SIZE:
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179 self._data_size = int(self._data_size)
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180 self._encoding = int(_read_u32(file))
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181 if self._encoding not in _simple_encodings:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
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parents:
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182 raise Error, 'encoding not (yet) supported'
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parents:
diff changeset
183 if self._encoding in (AUDIO_FILE_ENCODING_MULAW_8,
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184 AUDIO_FILE_ENCODING_LINEAR_8,
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parents:
diff changeset
185 AUDIO_FILE_ENCODING_ALAW_8):
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186 self._sampwidth = 2
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Sjoerd Mullender <sjoerd@acm.org>
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187 self._framesize = 1
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diff changeset
188 elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_16:
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189 self._framesize = self._sampwidth = 2
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190 elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_24:
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191 self._framesize = self._sampwidth = 3
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192 elif self._encoding == AUDIO_FILE_ENCODING_LINEAR_32:
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diff changeset
193 self._framesize = self._sampwidth = 4
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parents:
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194 else:
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Sjoerd Mullender <sjoerd@acm.org>
parents:
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195 raise Error, 'unknown encoding'
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diff changeset
196 self._framerate = int(_read_u32(file))
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197 self._nchannels = int(_read_u32(file))
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198 self._framesize = self._framesize * self._nchannels
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parents:
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199 if self._hdr_size > 24:
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Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
200 self._info = file.read(self._hdr_size - 24)
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parents:
diff changeset
201 for i in range(len(self._info)):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
202 if self._info[i] == '\0':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
203 self._info = self._info[:i]
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
204 break
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Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
205 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
206 self._info = ''
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
207
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
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diff changeset
208 def getfp(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
209 return self._file
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parents:
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210
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
211 def getnchannels(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
212 return self._nchannels
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parents:
diff changeset
213
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
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214 def getsampwidth(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
215 return self._sampwidth
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
216
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
217 def getframerate(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
218 return self._framerate
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
219
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
220 def getnframes(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
221 if self._data_size == AUDIO_UNKNOWN_SIZE:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
222 return AUDIO_UNKNOWN_SIZE
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
223 if self._encoding in _simple_encodings:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
224 return self._data_size / self._framesize
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Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
225 return 0 # XXX--must do some arithmetic here
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Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
226
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
227 def getcomptype(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
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parents:
diff changeset
228 if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
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parents:
diff changeset
229 return 'ULAW'
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parents:
diff changeset
230 elif self._encoding == AUDIO_FILE_ENCODING_ALAW_8:
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Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
231 return 'ALAW'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
232 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
233 return 'NONE'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
234
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
235 def getcompname(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
236 if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
237 return 'CCITT G.711 u-law'
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parents:
diff changeset
238 elif self._encoding == AUDIO_FILE_ENCODING_ALAW_8:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
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parents:
diff changeset
239 return 'CCITT G.711 A-law'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
240 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
241 return 'not compressed'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
242
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
243 def getparams(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
244 return self.getnchannels(), self.getsampwidth(), \
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
245 self.getframerate(), self.getnframes(), \
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parents:
diff changeset
246 self.getcomptype(), self.getcompname()
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parents:
diff changeset
247
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
248 def getmarkers(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
249 return None
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
250
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
251 def getmark(self, id):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
252 raise Error, 'no marks'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
253
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
254 def readframes(self, nframes):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
255 if self._encoding in _simple_encodings:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
256 if nframes == AUDIO_UNKNOWN_SIZE:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
257 data = self._file.read()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
258 else:
1539
5a17c43dcff0 aifc.py: framerate should be an int.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1481
diff changeset
259 data = self._file.read(nframes * self._framesize * self._nchannels)
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
260 if self._encoding == AUDIO_FILE_ENCODING_MULAW_8:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
261 import audioop
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
262 data = audioop.ulaw2lin(data, self._sampwidth)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
263 return data
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
264 return None # XXX--not implemented yet
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
265
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
266 def rewind(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
267 self._soundpos = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
268 self._file.seek(self._hdr_size)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
269
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
270 def tell(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
271 return self._soundpos
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
272
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
273 def setpos(self, pos):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
274 if pos < 0 or pos > self.getnframes():
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
275 raise Error, 'position not in range'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
276 self._file.seek(pos * self._framesize + self._hdr_size)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
277 self._soundpos = pos
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
278
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
279 def close(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
280 self._file = None
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
281
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
282 class Au_write:
4078
18451dca9469 Get rid of access statement
Guido van Rossum <guido@python.org>
parents: 2971
diff changeset
283 ## access _file, _framerate, _nchannels, _sampwidth, _framesize, \
18451dca9469 Get rid of access statement
Guido van Rossum <guido@python.org>
parents: 2971
diff changeset
284 ## _nframes, _nframeswritten, _datawritten, _info, \
18451dca9469 Get rid of access statement
Guido van Rossum <guido@python.org>
parents: 2971
diff changeset
285 ## _comptype: private
1437
e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1435
diff changeset
286
1435
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__()
Guido van Rossum <guido@python.org>
parents: 1424
diff changeset
287 def __init__(self, f):
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__()
Guido van Rossum <guido@python.org>
parents: 1424
diff changeset
288 if type(f) == type(''):
1540
4047f224efdb Use __builtin__ instead of builtin
Guido van Rossum <guido@python.org>
parents: 1539
diff changeset
289 import __builtin__
4047f224efdb Use __builtin__ instead of builtin
Guido van Rossum <guido@python.org>
parents: 1539
diff changeset
290 f = __builtin__.open(f, 'w')
1435
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__()
Guido van Rossum <guido@python.org>
parents: 1424
diff changeset
291 self.initfp(f)
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
292
1437
e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1435
diff changeset
293 def __del__(self):
e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1435
diff changeset
294 if self._file:
e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1435
diff changeset
295 self.close()
e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1435
diff changeset
296
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
297 def initfp(self, file):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
298 self._file = file
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
299 self._framerate = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
300 self._nchannels = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
301 self._sampwidth = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
302 self._framesize = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
303 self._nframes = AUDIO_UNKNOWN_SIZE
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
304 self._nframeswritten = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
305 self._datawritten = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
306 self._datalength = 0
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
307 self._info = ''
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
308 self._comptype = 'ULAW' # default is U-law
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
309
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
310 def setnchannels(self, nchannels):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
311 if self._nframeswritten:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
312 raise Error, 'cannot change parameters after starting to write'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
313 if nchannels not in (1, 2, 4):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
314 raise Error, 'only 1, 2, or 4 channels supported'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
315 self._nchannels = nchannels
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
316
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
317 def getnchannels(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
318 if not self._nchannels:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
319 raise Error, 'number of channels not set'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
320 return self._nchannels
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
321
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
322 def setsampwidth(self, sampwidth):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
323 if self._nframeswritten:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
324 raise Error, 'cannot change parameters after starting to write'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
325 if sampwidth not in (1, 2, 4):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
326 raise Error, 'bad sample width'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
327 self._sampwidth = sampwidth
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
328
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
329 def getsampwidth(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
330 if not self._framerate:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
331 raise Error, 'sample width not specified'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
332 return self._sampwidth
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
333
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
334 def setframerate(self, framerate):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
335 if self._nframeswritten:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
336 raise Error, 'cannot change parameters after starting to write'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
337 self._framerate = framerate
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
338
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
339 def getframerate(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
340 if not self._framerate:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
341 raise Error, 'frame rate not set'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
342 return self._framerate
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
343
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
344 def setnframes(self, nframes):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
345 if self._nframeswritten:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
346 raise Error, 'cannot change parameters after starting to write'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
347 if nframes < 0:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
348 raise Error, '# of frames cannot be negative'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
349 self._nframes = nframes
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
350
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
351 def getnframes(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
352 return self._nframeswritten
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
353
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
354 def setcomptype(self, type, name):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
355 if type in ('NONE', 'ULAW'):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
356 self._comptype = type
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
357 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
358 raise Error, 'unknown compression type'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
359
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
360 def getcomptype(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
361 return self._comptype
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
362
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
363 def getcompname(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
364 if self._comptype == 'ULAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
365 return 'CCITT G.711 u-law'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
366 elif self._comptype == 'ALAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
367 return 'CCITT G.711 A-law'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
368 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
369 return 'not compressed'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
370
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
371 def setparams(self, (nchannels, sampwidth, framerate, nframes, comptype, compname)):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
372 self.setnchannels(nchannels)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
373 self.setsampwidth(sampwidth)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
374 self.setframerate(framerate)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
375 self.setnframes(nframes)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
376 self.setcomptype(comptype, compname)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
377
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
378 def getparams(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
379 return self.getnchannels(), self.getsampwidth(), \
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
380 self.getframerate(), self.getnframes(), \
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
381 self.getcomptype(), self.getcompname()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
382
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
383 def tell(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
384 return self._nframeswritten
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
385
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
386 def writeframesraw(self, data):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
387 self._ensure_header_written()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
388 nframes = len(data) / self._framesize
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
389 if self._comptype == 'ULAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
390 import audioop
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
391 data = audioop.lin2ulaw(data, self._sampwidth)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
392 self._file.write(data)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
393 self._nframeswritten = self._nframeswritten + nframes
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
394 self._datawritten = self._datawritten + len(data)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
395
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
396 def writeframes(self, data):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
397 self.writeframesraw(data)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
398 if self._nframeswritten != self._nframes or \
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
399 self._datalength != self._datawritten:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
400 self._patchheader()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
401
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
402 def close(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
403 self._ensure_header_written()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
404 if self._nframeswritten != self._nframes or \
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
405 self._datalength != self._datawritten:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
406 self._patchheader()
1424
a2f2a8bd56f9 Don't close the file explicitly.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1419
diff changeset
407 self._file.flush()
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
408 self._file = None
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
409
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
410 #
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
411 # private methods
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
412 #
4078
18451dca9469 Get rid of access statement
Guido van Rossum <guido@python.org>
parents: 2971
diff changeset
413 ## if 0: access *: private
1437
e499116d45e4 aifc.py, sunau.py: Adapted comments; added access statements.
Sjoerd Mullender <sjoerd@acm.org>
parents: 1435
diff changeset
414
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
415 def _ensure_header_written(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
416 if not self._nframeswritten:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
417 if not self._nchannels:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
418 raise Error, '# of channels not specified'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
419 if not self._sampwidth:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
420 raise Error, 'sample width not specified'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
421 if not self._framerate:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
422 raise Error, 'frame rate not specified'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
423 self._write_header()
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
424
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
425 def _write_header(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
426 if self._comptype == 'NONE':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
427 if self._sampwidth == 1:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
428 encoding = AUDIO_FILE_ENCODING_LINEAR_8
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
429 self._framesize = 1
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
430 elif self._sampwidth == 2:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
431 encoding = AUDIO_FILE_ENCODING_LINEAR_16
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
432 self._framesize = 2
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
433 elif self._sampwidth == 4:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
434 encoding = AUDIO_FILE_ENCODING_LINEAR_32
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
435 self._framesize = 4
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
436 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
437 raise Error, 'internal error'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
438 elif self._comptype == 'ULAW':
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
439 encoding = AUDIO_FILE_ENCODING_MULAW_8
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
440 self._framesize = 1
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
441 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
442 raise Error, 'internal error'
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
443 self._framesize = self._framesize * self._nchannels
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
444 _write_u32(self._file, AUDIO_FILE_MAGIC)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
445 header_size = 25 + len(self._info)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
446 header_size = (header_size + 7) & ~7
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
447 _write_u32(self._file, header_size)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
448 if self._nframes == AUDIO_UNKNOWN_SIZE:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
449 length = AUDIO_UNKNOWN_SIZE
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
450 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
451 length = self._nframes * self._framesize
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
452 _write_u32(self._file, length)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
453 self._datalength = length
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
454 _write_u32(self._file, encoding)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
455 _write_u32(self._file, self._framerate)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
456 _write_u32(self._file, self._nchannels)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
457 self._file.write(self._info)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
458 self._file.write('\0'*(header_size - len(self._info) - 24))
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
459
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
460 def _patchheader(self):
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
461 self._file.seek(8)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
462 _write_u32(self._file, self._datawritten)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
463 self._datalength = self._datawritten
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
464 self._file.seek(0, 2)
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
465
1435
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__()
Guido van Rossum <guido@python.org>
parents: 1424
diff changeset
466 def open(f, mode):
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
467 if mode == 'r':
1435
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__()
Guido van Rossum <guido@python.org>
parents: 1424
diff changeset
468 return Au_read(f)
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
469 elif mode == 'w':
1435
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__()
Guido van Rossum <guido@python.org>
parents: 1424
diff changeset
470 return Au_write(f)
1419
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
471 else:
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
472 raise Error, "mode must be 'r' or 'w'"
204001dddcc3 aifc.py: added missing tell() method in AIFC write class;
Sjoerd Mullender <sjoerd@acm.org>
parents:
diff changeset
473
1435
560ec7030817 * Mass change: get rid of all init() methods, in favor of __init__()
Guido van Rossum <guido@python.org>
parents: 1424
diff changeset
474 openfp = open