diff options
Diffstat (limited to 'decoders')
| -rw-r--r-- | decoders/Makefile.am | 1 | ||||
| -rw-r--r-- | decoders/i2s_dump/Makefile.am | 26 | ||||
| -rw-r--r-- | decoders/i2s_dump/__init__.py | 26 | ||||
| -rw-r--r-- | decoders/i2s_dump/pd.py | 107 |
4 files changed, 160 insertions, 0 deletions
diff --git a/decoders/Makefile.am b/decoders/Makefile.am index 34843f2..4ad5930 100644 --- a/decoders/Makefile.am +++ b/decoders/Makefile.am @@ -29,6 +29,7 @@ SUBDIRS = \ i2cdemux \ i2cfilter \ i2s \ + i2s_dump \ jtag \ jtag_stm32 \ lm75 \ diff --git a/decoders/i2s_dump/Makefile.am b/decoders/i2s_dump/Makefile.am new file mode 100644 index 0000000..fda1fff --- /dev/null +++ b/decoders/i2s_dump/Makefile.am @@ -0,0 +1,26 @@ +## +## 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 +## + +pkgdatadir = $(DECODERS_DIR)/i2s_dump + +dist_pkgdata_DATA = __init__.py pd.py + +CLEANFILES = *.pyc + diff --git a/decoders/i2s_dump/__init__.py b/decoders/i2s_dump/__init__.py new file mode 100644 index 0000000..6b24953 --- /dev/null +++ b/decoders/i2s_dump/__init__.py @@ -0,0 +1,26 @@ +## +## 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 * + diff --git a/decoders/i2s_dump/pd.py b/decoders/i2s_dump/pd.py new file mode 100644 index 0000000..8f95a86 --- /dev/null +++ b/decoders/i2s_dump/pd.py @@ -0,0 +1,107 @@ +## +## 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, metadata): + # A filename of 'none' is not allowed (has special meaning). A filename + # of '-' means 'stdout'. + self.f = self.file_open(self.options['filename']) + + def report(self): + pass + + # 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'\x44\xac\x00\x00') # Samplerate (44100) + self.f.write(b'\x88\x58\x01\x00') # Byterate (88200) TODO + 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('%02x%02x' % (lo, hi), 'utf-8')) + self.f.flush() + |