Initial commit

.git-hooks/pre-commit/check_untracked.py

@@ -0,0 +1,47 @@
+#!/usr/bin/env python
+
+import subprocess
+import os
+import pdb
+import fnmatch
+
+import sys
+
+def main():
+    p = subprocess.Popen(["git", "rev-parse", "--show-toplevel"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = p.communicate()
+
+    out = out.strip('\n')
+    track_filepath = os.path.join(out, ".gittrack")
+
+    p = subprocess.Popen(["git", "ls-files", out, "--exclude-standard", "--others"], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
+    out, err = p.communicate()
+
+    out = out.splitlines()
+
+    try:
+        with open(track_filepath) as f:
+            content = f.read().splitlines()
+    except IOError:
+        return 0
+
+
+    untracked = []
+    for filepath in out:
+        for name in content:
+            if fnmatch.fnmatch(filepath, name):
+                untracked.append(filepath)
+
+    if untracked:
+        print "The following files are not tracked: "
+        for i in untracked:
+            print i
+        print "Please either stage these files for the commit or add them to the project's .gitignore to disregard them."
+        return 1
+    else:
+        return 0
+
+
+
+if __name__ == "__main__":
+    exit(main())

.gitignore

@@ -0,0 +1,37 @@
+.DS_Store
+bin/
+# Compiled Object files
+*.slo
+*.lo
+*.o
+*.obj
+
+# Precompiled Headers
+*.gch
+*.pch
+
+# Compiled Dynamic libraries
+*.so
+*.dylib
+*.dll
+
+# Fortran module files
+*.mod
+*.smod
+
+# Compiled Static libraries
+*.lai
+*.la
+*.a
+*.lib
+
+# Executables
+*.exe
+*.out
+*.app
+
+# Log files
+*.log
+
+external/
+CMakeFiles/

.overcommit.yml

@@ -0,0 +1,41 @@
+# Use this file to configure the Overcommit hooks you wish to use. This will
+# extend the default configuration defined in:
+# https://github.com/brigade/overcommit/blob/master/config/default.yml
+#
+# At the topmost level of this YAML file is a key representing type of hook
+# being run (e.g. pre-commit, commit-msg, etc.). Within each type you can
+# customize each hook, such as whether to only run it on certain files (via
+# `include`), whether to only display output if it fails (via `quiet`), etc.
+#
+# For a complete list of hooks, see:
+# https://github.com/brigade/overcommit/tree/master/lib/overcommit/hook
+#
+# For a complete list of options that you can use to customize hooks, see:
+# https://github.com/brigade/overcommit#configuration
+#
+# Uncomment the following lines to make the configuration take effect.
+
+#PreCommit:
+#  RuboCop:
+#    enabled: true
+#    on_warn: fail # Treat all warnings as failures
+#
+#  TrailingWhitespace:
+#    enabled: true
+#    exclude:
+#      - '**/db/structure.sql' # Ignore trailing whitespace in generated files
+#
+#PostCheckout:
+#  ALL: # Special hook name that customizes all hooks of this type
+#    quiet: true # Change all post-checkout hooks to only display output on failure
+#
+#  IndexTags:
+#    enabled: true # Generate a tags file with `ctags` each time HEAD changes
+
+
+PreCommit:
+  CheckUntracked:
+    enabled: true
+    quiet: false
+    description: 'Check for files that should be tracked or ignored.'
+    required_executable: './.git-hooks/pre-commit/check_untracked.py'

build

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+../Bela/scripts/build_project.sh ./src/ -p Assignment_1

run

@@ -0,0 +1,3 @@
+#!/usr/bin/env bash
+
+../Bela/scripts/run_project.sh Assignment_1

src/main.cpp

@@ -0,0 +1,106 @@
+/*
+ * assignment1_crossover
+ * RTDSP 2017
+ *
+ * First assignment for ECS732 RTDSP, to implement a 2-way audio crossover
+ * using the BeagleBone Black.
+ *
+ * Andrew McPherson and Victor Zappi
+ * Edited by Becky Stewart
+ * Queen Mary, University of London
+ */
+
+#include <unistd.h>
+#include <iostream>
+#include <cstdlib>
+#include <libgen.h>
+#include <signal.h>
+#include <getopt.h>
+#include <Bela.h>
+
+using namespace std;
+
+// Handle Ctrl-C by requesting that the audio rendering stop
+void interrupt_handler(int var)
+{
+	gShouldStop = true;
+}
+
+// Print usage information
+void usage(const char * processName)
+{
+	cerr << "Usage: " << processName << " [options]" << endl;
+
+	Bela_usage();
+
+	cerr << "   --help [-h]:                Print this menu\n";
+}
+
+int main(int argc, char *argv[])
+{
+	BelaInitSettings settings;	// Standard audio settings
+	float frequency = 1000.0;	// Frequency of crossover
+
+	struct option customOptions[] =
+	{
+		{"help", 0, NULL, 'h'},
+		{"frequency", 1, NULL, 'f'},
+		{NULL, 0, NULL, 0}
+	};
+
+	// Set default settings
+	Bela_defaultSettings(&settings);
+
+	// Parse command-line arguments
+	while (1) {
+		int c;
+		if ((c = Bela_getopt_long(argc, argv, "hf:", customOptions, &settings)) < 0)
+				break;
+		switch (c) {
+		case 'h':
+				usage(basename(argv[0]));
+				exit(0);
+        case 'f':
+        		frequency = atof(optarg);
+        		if(frequency < 20.0)
+        			frequency = 20.0;
+        		if(frequency > 5000.0)
+        			frequency = 5000.0;
+        		break;
+		case '?':
+		default:
+				usage(basename(argv[0]));
+				exit(1);
+		}
+	}
+
+	// Initialise the PRU audio device
+	if(Bela_initAudio(&settings, &frequency) != 0) {
+		cout << "Error: unable to initialise audio" << endl;
+		return -1;
+	}
+
+	// Start the audio device running
+	if(Bela_startAudio()) {
+		cout << "Error: unable to start real-time audio" << endl;
+		return -1;
+	}
+
+	// Set up interrupt handler to catch Control-C
+	signal(SIGINT, interrupt_handler);
+	signal(SIGTERM, interrupt_handler);
+
+	// Run until told to stop
+	while(!gShouldStop) {
+		usleep(100000);
+	}
+
+	// Stop the audio device
+	Bela_stopAudio();
+
+	// Clean up any resources allocated for audio
+	Bela_cleanupAudio();
+
+	// All done!
+	return 0;
+}

src/render.cpp

@@ -0,0 +1,72 @@
+/*
+ * assignment1_crossover
+ * RTDSP 2017
+ *
+ * First assignment for ECS732 RTDSP, to implement a 2-way audio crossover
+ * using the BeagleBone Black.
+ *
+ * Andrew McPherson and Victor Zappi
+ * Modified by Becky Stewart
+ * Queen Mary, University of London
+ */
+
+#include <Bela.h>
+#include <cmath>
+#include <Utilities.h>
+
+/* TASK: declare any global variables you need here */
+
+// setup() is called once before the audio rendering starts.
+// Use it to perform any initialisation and allocation which is dependent
+// on the period size or sample rate.
+//
+// userData holds an opaque pointer to a data structure that was passed
+// in from the call to initAudio().
+//
+// Return true on success; returning false halts the program.
+
+bool setup(BelaContext *context, void *userData)
+{
+	float crossoverFrequency;
+	// Retrieve a parameter passed in from the initAudio() call
+	if(userData != 0)
+		crossoverFrequency = *(float *)userData;
+
+	/* TASK:
+	 * Calculate the filter coefficients based on the given
+	 * crossover frequency.
+	 *
+	 * Initialise any previous state (clearing buffers etc.)
+	 * to prepare for calls to render()
+	 */
+
+	return true;
+}
+
+// render() is called regularly at the highest priority by the audio engine.
+// Input and output are given from the audio hardware and the other
+// ADCs and DACs (if available). If only audio is available, numMatrixFrames
+// will be 0.
+
+void render(BelaContext *context, void *userData)
+{
+	/* TASK:
+	 * Mix the two input channels together.
+	 *
+	 * Apply a lowpass filter and a highpass filter, sending the
+	 * lowpass output to the left channel and the highpass output
+	 * to the right channel.
+	 */
+}
+
+// cleanup_render() is called once at the end, after the audio has stopped.
+// Release any resources that were allocated in initialise_render().
+
+void cleanup(BelaContext *context, void *userData)
+{
+	/* TASK:
+	 * If you allocate any memory, be sure to release it here.
+	 * You may or may not need anything in this function, depending
+	 * on your implementation.
+	 */
+}