Generate test files in various formats during build.

build_utils/waf/ffmpeg.py

@@ -0,0 +1,88 @@
+# -*- mode: python -*-
+
+# @begin:license
+#
+# Copyright (c) 2015-2019, Benjamin Niemann <pink@odahoda.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 Street, Fifth Floor, Boston, MA 02110-1301 USA.
+#
+# @end:license
+
+import os.path
+import subprocess
+import sys
+
+from waflib.Configure import conf
+from waflib.Task import Task
+from waflib import Utils
+
+
+def configure(ctx):
+    ctx.find_program('ffmpeg')
+
+
+class ffmpeg_runner(Task):
+    def __init__(self, args, **kwargs):
+        super().__init__(**kwargs)
+        self.__args = args
+
+    def __str__(self):
+        return self.outputs[0].relpath()
+
+    def keyword(self):
+        return 'Generating'
+
+    def run(self):
+        ctx = self.generator.bld
+        cwd = ctx.srcnode
+
+        cmd = [
+            ctx.env.FFMPEG[0],
+            '-y', '-nostdin',
+            '-i', self.inputs[0].path_from(cwd)
+        ]
+        cmd.extend(self.__args)
+        cmd.append(self.outputs[0].path_from(cwd))
+
+        kw = {
+            'cwd': cwd.abspath(),
+            'stdout': subprocess.PIPE,
+            'stderr': subprocess.STDOUT,
+        }
+        ctx.log_command(cmd, kw)
+        rc, out, _ = Utils.run_process(cmd, kw)
+        if rc:
+            sys.stderr.write(out.decode('utf-8'))
+        return rc
+
+
+@conf
+def run_ffmpeg(ctx, target, source, args, install=None, install_to=None, chmod=0o644):
+    target = ctx.path.get_bld().make_node(target)
+
+    task = ffmpeg_runner(env=ctx.env, args=args)
+    task.set_inputs(ctx.path.find_resource(source))
+    task.set_outputs(target)
+    ctx.add_to_group(task)
+
+    if install is None:
+        install = ctx.in_group(ctx.GRP_BUILD_MAIN)
+
+    if install:
+        if install_to is None:
+            install_to = os.path.join(
+                ctx.env.DATADIR, target.parent.path_from(ctx.bldnode.make_node('data')))
+
+        ctx.install_files(install_to, target, chmod=chmod)

testdata/wscript

@@ -23,8 +23,9 @@
 def build(ctx):
     ctx.static_file('kick-gettinglaid.wav')
     ctx.static_file('future-thunder1.wav')
-    ctx.static_file('future-thunder1.mp3')
-    ctx.static_file('future-thunder1.aac')
+    ctx.run_ffmpeg('future-thunder1.mp3', 'future-thunder1.wav', ['-f', 'mp3'])
+    ctx.run_ffmpeg('future-thunder1.aac', 'future-thunder1.wav', ['-f', 'adts'])
+    ctx.run_ffmpeg('future-thunder1.flac', 'future-thunder1.wav', ['-f', 'flac'])
     ctx.static_file('test1.wav')
     ctx.static_file('symbol.svg')
     ctx.rendered_csound('kick.csnd')

wscript

@@ -116,6 +116,7 @@ def configure(ctx):
     ctx.load('build_utils.waf.plugins', tooldir='.')
     ctx.load('build_utils.waf.svg', tooldir='.')
     ctx.load('build_utils.waf.faust', tooldir='.')
+    ctx.load('build_utils.waf.ffmpeg', tooldir='.')
 
     ctx.check_python_version(minver=(3, 5))
     ctx.check_python_headers(features=['pyext'])