['right', 'Right channel'],
['warnings', 'Warnings'],
]
+ binary = (
+ ('wav', 'WAV file'),
+ )
def __init__(self, **kwargs):
self.samplerate = None
self.first_sample = None
self.start_sample = None
self.wordlength = -1
+ self.wrote_wav_header = False
def start(self):
self.out_proto = self.register(srd.OUTPUT_PYTHON)
+ self.out_bin = self.register(srd.OUTPUT_BINARY)
self.out_ann = self.register(srd.OUTPUT_ANN)
def metadata(self, key, value):
def putpb(self, data):
self.put(self.start_sample, self.samplenum, self.out_proto, data)
+ def putbin(self, data):
+ self.put(self.start_sample, self.samplenum, self.out_bin, data)
+
def putb(self, data):
self.put(self.start_sample, self.samplenum, self.out_ann, data)
return 'I²S: %d %d-bit samples received at %sHz' % \
(self.samplesreceived, self.wordlength, samplerate)
+ def wav_header(self):
+ # Chunk descriptor
+ h = b'RIFF'
+ h += b'\x24\x80\x00\x00' # Chunk size (2084)
+ h += b'WAVE'
+ # Fmt subchunk
+ h += b'fmt '
+ h += b'\x10\x00\x00\x00' # Subchunk size (16 bytes)
+ h += b'\x01\x00' # Audio format (0x0001 == PCM)
+ h += b'\x02\x00' # Number of channels (2)
+ h += b'\x80\x3e\x00\x00' # Samplerate (16000)
+ h += b'\x00\x7d\x00\x00' # Byterate (32000)
+ h += b'\x04\x00' # Blockalign (4)
+ h += b'\x10\x00' # Bits per sample (16)
+ # Data subchunk
+ h += b'data'
+ h += b'\xff\xff\x00\x00' # Subchunk size (65535 bytes) TODO
+ return h
+
+ def wav_sample(self, sample):
+ # TODO: This currently assumes U32 samples, and converts to S16.
+ s = sample >> 16
+ if s >= 0x8000:
+ s -= 0x10000
+ lo, hi = s & 0xff, (s >> 8) & 0xff
+ return bytes([lo, hi])
+
def decode(self, ss, es, data):
if self.samplerate is None:
raise Exception("Cannot decode without samplerate.")
# Only submit the sample, if we received the beginning of it.
if self.start_sample != None:
+
+ if not self.wrote_wav_header:
+ self.put(0, 0, self.out_bin, (0, self.wav_header()))
+ self.wrote_wav_header = True
+
self.samplesreceived += 1
idx = 0 if self.oldws else 1
self.putpb(['DATA', [c3, self.data]])
self.putb([idx, ['%s: %s' % (c1, v), '%s: %s' % (c2, v),
'%s: %s' % (c3, v), c3]])
+ self.putbin((0, self.wav_sample(self.data)))
# Check that the data word was the correct length.
if self.wordlength != -1 and self.wordlength != self.bitcount:
+++ /dev/null
-##
-## This file is part of the libsigrokdecode project.
-##
-## Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-'''
-TODO.
-'''
-
-from .pd import *
-
+++ /dev/null
-##
-## This file is part of the libsigrokdecode project.
-##
-## Copyright (C) 2013 Uwe Hermann <uwe@hermann-uwe.de>
-##
-## This program is free software; you can redistribute it and/or modify
-## it under the terms of the GNU General Public License as published by
-## the Free Software Foundation; either version 2 of the License, or
-## (at your option) any later version.
-##
-## This program is distributed in the hope that it will be useful,
-## but WITHOUT ANY WARRANTY; without even the implied warranty of
-## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-## GNU General Public License for more details.
-##
-## You should have received a copy of the GNU General Public License
-## along with this program; if not, write to the Free Software
-## Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
-##
-
-import sigrokdecode as srd
-import os
-import sys
-
-class Decoder(srd.Decoder):
- api_version = 1
- id = 'i2s_dump'
- name = 'I²S dump'
- longname = 'I²S dump'
- desc = 'Output decoded I²S data to a file.'
- license = 'gplv2+'
- inputs = ['i2s']
- outputs = []
- probes = []
- optional_probes = []
- options = {
- 'format': ['File format for the output data', 'wav'],
- 'filename': ['File name for the output data', '-'],
- }
- annotations = []
-
- def __init__(self, **kwargs):
- self.wrote_header = False
- self.f = None
-
- def file_open(self, filename):
- if filename == 'none':
- return None
- elif filename == '-':
- return sys.stdout
- else:
- return open(filename, 'wb')
-
- def start(self):
- # A filename of 'none' is not allowed (has special meaning). A filename
- # of '-' means 'stdout'.
- self.f = self.file_open(self.options['filename'])
-
- # TODO: Lots of hard-coded fields in here.
- def write_wav_header(self):
- # Chunk descriptor
- self.f.write(b'RIFF')
- self.f.write(b'\x24\x80\x00\x00') # Chunk size (2084)
- self.f.write(b'WAVE')
-
- # Fmt subchunk
- self.f.write(b'fmt ')
- self.f.write(b'\x10\x00\x00\x00') # Subchunk size (16 bytes)
- self.f.write(b'\x01\x00') # Audio format (0x0001 == PCM)
- self.f.write(b'\x02\x00') # Number of channels (2)
- self.f.write(b'\x80\x3e\x00\x00') # Samplerate (16000)
- self.f.write(b'\x00\x7d\x00\x00') # Byterate (32000)
- self.f.write(b'\x04\x00') # Blockalign (4)
- self.f.write(b'\x10\x00') # Bits per sample (16)
-
- # Data subchunk
- self.f.write(b'data')
- self.f.write(b'\xff\xff\x00\x00') # Subchunk size (65535 bytes) TODO
-
- self.f.flush()
-
- def decode(self, ss, es, data):
- ptype, pdata = data
-
- if ptype != 'DATA':
- return
-
- channel, sample = pdata
-
- if self.wrote_header == False:
- self.write_wav_header()
- self.wrote_header = True
-
- # Output the next sample to 'filename'.
- # TODO: Data: first left channel, then right channel.
- if self.f != None:
- # TODO: This currently assumes U32 samples, and converts to S16.
- s = sample >> 16
- if s >= 0x8000:
- s -= 0x10000
- lo, hi = s & 0xff, (s >> 8) & 0xff
- self.f.write(bytes([lo, hi]))
- self.f.flush()
-
projects / libsigrokdecode.git / commitdiff