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2021-12-07 Fred Gleason <fredg@paravelsystems.com>

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* Added an 'Export()' method to the 'rivwebpyapi' API.

Signed-off-by: Fred Gleason <fredg@paravelsystems.com>
This commit is contained in:
Fred Gleason
2021-12-07 11:35:54 -05:00
parent 0dd11053fb
commit fa28a37c47
4 changed files with 191 additions and 0 deletions
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89
apis/rivwebpyapi/api/rivwebpyapi.py
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@@ -27,6 +27,17 @@ from urllib.parse import urlparse
from xml.sax.handler import ContentHandler
import xml.sax
#
# Audio Formats
#
AUDIO_FORMAT_PCM16_WAV=0
AUDIO_FORMAT_PCM24_WAV=7
AUDIO_FORMAT_MPEG_L2_WAV=6
AUDIO_FORMAT_MPEG_L2_NATIVE=2
AUDIO_FORMAT_MPEG_L3_NATIVE=3
AUDIO_FORMAT_FLAC=4
AUDIO_FORMAT_OGG_VORBIS=5
class RivWebPyApi_ListHandler(ContentHandler):
def __init__(self,base_tag,fields):
self.__output=[]
@@ -618,6 +629,84 @@ class rivwebpyapi(object):
if(r.status_code!=requests.codes.ok):
r.raise_for_status()
def Export(self,filename,cart_number,cut_number,audio_format,channels,
sample_rate,bit_rate,quality,start_point,end_point,
normalization_level,enable_metadata):
"""
Export audio data from the audio store (file).
Takes the following arguments:
filename - Location to save the exported audio file (string).
cart_number - The number of the desired cart, in the range
1 - 999999 (integer)
cut_number - The number of the desired cut, in the range
1 - 999 (integer)
audio_format - Format of the exported audio (AUDIO_FORMAT)
channels - Channel count of the exported audio (integer)
sample_rate - Sample rate of the exported audio (integer,
samples/sec)
bit_rate - Bit rate of the export audio [MPEG formats only]
(integer, bits/sec)
quality - Quality [OggVorbis only] (integer, -1 - 10)
start_point - Start point of audio export (integer, mS from
absolute start of stored audio)
end_point - End point of audio export (integer, mS from
absolute start of stored audio)
normalization_level - Normalization level, 0 = no normalization
(integer, dBFS)
enable_metadata - Encode metadata into exported file (boolean)
"""
if((cart_number<1)or(cart_number>999999)):
raise ValueError('invalid cart number')
if((cut_number<1)or(cut_number>999)):
raise ValueError('invalid cut number')
#
# Build the WebAPI arguments
#
postdata={
'COMMAND': '1',
'LOGIN_NAME': self.__connection_username,
'PASSWORD': self.__connection_password,
'CART_NUMBER': str(cart_number),
'CUT_NUMBER': str(cut_number),
'FORMAT': str(audio_format),
'CHANNELS': str(channels),
'SAMPLE_RATE': str(sample_rate),
'BIT_RATE': str(bit_rate),
'QUALITY': str(quality),
'START_POINT': str(start_point),
'END_POINT': str(end_point),
'NORMALIZATION_LEVEL': str(normalization_level)
}
if(enable_metadata):
postdata['ENABLE_METADATA']='1'
else:
postdata['ENABLE_METADATA']='0'
#
# Fetch the audio data
#
r=requests.post(self.__connection_url,data=postdata,stream=True)
if(r.status_code!=requests.codes.ok):
r.raise_for_status()
with open(filename,'wb') as handle:
for block in r.iter_content(1024):
handle.write(block)
def ListCart(self,cart_number,include_cuts=False):
"""
Returns the metadata associated with a Rivendell cart