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Debugging with a jupyter notebook

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Jamie Hardt
2018-12-31 16:33:24 -08:00
parent 84f5d0391b
commit 0e21053d4e
4 changed files with 197 additions and 20 deletions
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180
examples/wavinfo.ipynb Normal file
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@@ -0,0 +1,180 @@
{
"cells": [
{
"cell_type": "code",
"execution_count": 1,
"metadata": {},
"outputs": [],
"source": [
"import wavinfo\n",
"import pprint"
]
},
{
"cell_type": "code",
"execution_count": 2,
"metadata": {},
"outputs": [],
"source": [
"pp = pprint.PrettyPrinter(indent=4)"
]
},
{
"cell_type": "code",
"execution_count": 3,
"metadata": {},
"outputs": [],
"source": [
"testfile_path = \"../tests/test_files/\"\n",
"sound_devices_file = testfile_path + \"A101_1.WAV\"\n",
"\n",
"info = wavinfo.WavInfoReader(sound_devices_file)"
]
},
{
"cell_type": "code",
"execution_count": 4,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"WavInfoFormat(audio_format=1, channel_count=2, sample_rate=48000, byte_rate=288000, block_align=6, bits_per_sample=24)\n"
]
}
],
"source": [
"pp.pprint(info.fmt)"
]
},
{
"cell_type": "code",
"execution_count": 5,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"WavBextFormat(description='sSPEED=023.976-ND\\r\\nsTAKE=1\\r\\nsUBITS=$12311801\\r\\nsSWVER=2.67\\r\\nsPROJECT=BMH\\r\\nsSCENE=A101\\r\\nsFILENAME=A101_1.WAV\\r\\nsTAPE=18Y12M31\\r\\nsTRK1=MKH516 A\\r\\nsTRK2=Boom\\r\\nsNOTE=', originator='Sound Dev: 702T S#GR1112089007', originator_ref='USSDVGR1112089007124001008206301', originator_date='2018-12-31', originator_time='12:40:00', time_reference=2190940753, version=1, umid=b'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00', loudness_value=0, loudness_range=0, max_true_peak=0, max_momentary_loudness=0, max_shortterm_loudness=0, coding_history='A=PCM,F=48000,W=24,M=stereo,R=48000,T=2 Ch')\n"
]
}
],
"source": [
"pp.pprint(info.bext)"
]
},
{
"cell_type": "code",
"execution_count": 6,
"metadata": {},
"outputs": [
{
"data": {
"text/plain": [
"('BMH', 'A101', '1', 240239)"
]
},
"execution_count": 6,
"metadata": {},
"output_type": "execute_result"
}
],
"source": [
"info.ixml.project, info.ixml.scene, info.ixml.take, info.data.frame_count"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
},
{
"cell_type": "code",
"execution_count": 7,
"metadata": {},
"outputs": [],
"source": [
"pro_tools_file = testfile_path + \"PT A101_4.A1.wav\""
]
},
{
"cell_type": "code",
"execution_count": 8,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"[ ChunkDescriptor(ident=b'bext', start=20, length=858),\n",
" ChunkDescriptor(ident=b'iXML', start=886, length=5226),\n",
" ChunkDescriptor(ident=b'fmt ', start=6120, length=16),\n",
" ChunkDescriptor(ident=b'data', start=6144, length=864840),\n",
" ChunkDescriptor(ident=b'umid', start=870992, length=24),\n",
" ChunkDescriptor(ident=b'minf', start=871024, length=16),\n",
" ChunkDescriptor(ident=b'regn', start=871048, length=92)]\n"
]
}
],
"source": [
"import wavinfo.wave_parser\n",
"\n",
"with open(pro_tools_file,'rb') as f:\n",
" chunk_tree = wavinfo.wave_parser.parse_chunk(f)\n",
"\n",
"pp.pprint(chunk_tree.children)"
]
},
{
"cell_type": "code",
"execution_count": 9,
"metadata": {},
"outputs": [
{
"name": "stdout",
"output_type": "stream",
"text": [
"WavBextFormat(description='dUBITS=12311804\\r\\ndSCENE=A101\\r\\ndTAKE=4\\r\\ndTAPE=18Y12M31\\r\\ndFRAMERATE=23.976ND\\r\\ndSPEED=023.976-NDF\\r\\ndTRK1=MKH516 A\\r\\ndTRK2=Boom', originator='Sound Dev: 702T S#GR1112089007', originator_ref='aa4CKtcd13Vk', originator_date='2018-12-31', originator_time='12:40:07', time_reference=2191709524, version=0, umid=b'\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00\\x00', loudness_value=0, loudness_range=0, max_true_peak=0, max_momentary_loudness=0, max_shortterm_loudness=0, coding_history='A=PCM,F=48000,W=24,M=stereo,R=48000,T=2 Ch')\n"
]
}
],
"source": [
"ptinfo = wavinfo.WavInfoReader(pro_tools_file)\n",
"\n",
"print(ptinfo.bext)"
]
},
{
"cell_type": "code",
"execution_count": null,
"metadata": {},
"outputs": [],
"source": []
}
],
"metadata": {
"kernelspec": {
"display_name": "Python 3",
"language": "python",
"name": "python3"
},
"language_info": {
"codemirror_mode": {
"name": "ipython",
"version": 3
},
"file_extension": ".py",
"mimetype": "text/x-python",
"name": "python",
"nbconvert_exporter": "python",
"pygments_lexer": "ipython3",
"version": "3.7.2"
}
},
"nbformat": 4,
"nbformat_minor": 2
}

3
wavinfo/wave_ixml_reader.py
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@@ -9,10 +9,7 @@ class WavIXMLFormat:
self.parsed = ET.fromstring(xml) self.parsed = ET.fromstring(xml)
def _get_text_value(self, xpath): def _get_text_value(self, xpath):
print("xpath",xpath)
print("search", "./" + xpath)
e = self.parsed.find("./" + xpath) e = self.parsed.find("./" + xpath)
print("result was", e)
if e is not None: if e is not None:
return e.text return e.text

3
wavinfo/wave_parser.py
View File

@@ -1,9 +1,6 @@
import struct import struct
from .wave_ixml_reader import WavIXMLFormat
from collections import namedtuple from collections import namedtuple
ListChunkDescriptor = namedtuple('ListChunk' , 'signature children') ListChunkDescriptor = namedtuple('ListChunk' , 'signature children')

31
wavinfo/wave_reader.py
View File

@@ -2,8 +2,10 @@ import struct
from collections import namedtuple from collections import namedtuple
WavDataDescriptor = namedtuple('WavDataDescriptor','byte_count frame_count') from .wave_parser import parse_chunk
from .wave_ixml_reader import WavIXMLFormat
WavDataDescriptor = namedtuple('WavDataDescriptor','byte_count frame_count')
WavInfoFormat = namedtuple("WavInfoFormat",'audio_format channel_count sample_rate byte_rate block_align bits_per_sample') WavInfoFormat = namedtuple("WavInfoFormat",'audio_format channel_count sample_rate byte_rate block_align bits_per_sample')
@@ -27,11 +29,11 @@ class WavInfoReader():
self.main_list = chunks.children self.main_list = chunks.children
f.seek(0) f.seek(0)
self.fmt = self._get_format(self.main_list,f) self.fmt = self._get_format(f)
self.bext = self._get_bext(self.main_list,f) self.bext = self._get_bext(f)
self.ixml = self._get_ixml(self.main_list,f) self.ixml = self._get_ixml(f)
self.data = delf._describe_data(self.main_list,f) self.data = self._describe_data(f)
def _find_chunk_data(self, ident, from_stream, default_none=False): def _find_chunk_data(self, ident, from_stream, default_none=False):
chunk_descriptor = None chunk_descriptor = None
@@ -49,12 +51,13 @@ class WavInfoReader():
def _describe_data(self,f): def _describe_data(self,f):
data_chunk = next(c for c in self.main_list if c.ident == b'data') data_chunk = next(c for c in self.main_list if c.ident == b'data')
return WavDataDescriptor(byte_count= data_chunk.length, frame_count= data_chunk.length / self.fmt.block_align) return WavDataDescriptor(byte_count= data_chunk.length,
frame_count= int(data_chunk.length / self.fmt.block_align))
def _get_format(self,chunks,f): def _get_format(self,f):
fmt_data = se._find_chunk_data(b'fmt ',f) fmt_data = self._find_chunk_data(b'fmt ',f)
# The format chunk is # The format chunk is
# audio_format U16 # audio_format U16
@@ -63,7 +66,7 @@ class WavInfoReader():
# byte_rate U32 == SampleRate * NumChannels * BitsPerSample/8 # byte_rate U32 == SampleRate * NumChannels * BitsPerSample/8
# block_align U16 == NumChannels * BitsPerSample/8 # block_align U16 == NumChannels * BitsPerSample/8
# bits_per_sampl U16 # bits_per_sampl U16
packstring = "<HHIIHH", packstring = "<HHIIHH"
rest_starts = struct.calcsize(packstring) rest_starts = struct.calcsize(packstring)
unpacked = struct.unpack(packstring, fmt_data[:rest_starts]) unpacked = struct.unpack(packstring, fmt_data[:rest_starts])
@@ -82,9 +85,9 @@ class WavInfoReader():
bits_per_sample = unpacked[5] bits_per_sample = unpacked[5]
) )
def _get_bext(self,chunks,f): def _get_bext(self,f):
bext_data = self._find_chunk_data(b'bext',f,default_none=True bext_data = self._find_chunk_data(b'bext',f,default_none=True)
# description[256] # description[256]
# originator[32] # originator[32]
@@ -104,7 +107,7 @@ class WavInfoReader():
# maxshorttermloudness S16 (LUFS*100) # maxshorttermloudness S16 (LUFS*100)
# reserved[180] # reserved[180]
# codinghistory [] # codinghistory []
if bext_data == None: if bext_data is None:
return None return None
packstring = "<256s"+ "32s" + "32s" + "10s" + "8s" + "QH" + "64s" + "hhhhh" + "180s" packstring = "<256s"+ "32s" + "32s" + "10s" + "8s" + "QH" + "64s" + "hhhhh" + "180s"
@@ -128,10 +131,10 @@ class WavInfoReader():
coding_history = bext_data[rest_starts:].decode('ascii').rstrip(' \t\r\n\0') coding_history = bext_data[rest_starts:].decode('ascii').rstrip(' \t\r\n\0')
) )
def _get_ixml(self,chunks,f): def _get_ixml(self,f):
ixml_data = self._find_chunk_data(b'iXML',f,default_none=True) ixml_data = self._find_chunk_data(b'iXML',f,default_none=True)
if ixml_data == None: if ixml_data is None:
return None return None
ixml_string = ixml_data.decode('utf-8') ixml_string = ixml_data.decode('utf-8')