For each word it can speak, you will record an audiofile for that word. You can use the audiotool to do this, but remember that you must remove the headers from these files.
Part 1
Make a directory for this assignment.
Make subdirectories called withheaders and withoutheaders
which will contain the audio files.
Create audio files in withheaders which correspond to your
speaking each of the following:
When you get done you should have at least 25 audio files.
Try playing each with audioplay.
Copy all of these into withoutheaders and remove the headers.
You can remove headers with audioconvert. For example, in the
Part 2
Add the function:
Also write a function:
Write a main program which tests this by playing a few words in sequence.
Part 3
Add the function:
Write a main program to test these. The main program should take a single
string command line parameter. For example, if your main program is called
testpart3 you might test this with something like:
Part 4
Write a main program which takes no command line arguments and uses your
audio object to say two sentences. The first sentence will be:
It should also print each sentence to standard output before syaing it.
Use a delay of 100 milliseconds between words.
Notes:
audioconvert -f raw -o ../withoutheaders/program.au program.au
Get the audio object called Program 3.4 in PUP from
/usr/local/courses/cs3733/pup/ch03/raw/prog03.04.c.
Change the name of this file to audiolib.c.
Make a file audiolib.h that contains prototypes for the functions
in audiolib.c.
int initialize_audio_files(char *dir);
which takes a directory
name and reads all of the files from that directory into an array of
file_data structures.
It returns 0 on success and -1 on failure.
You can just use get_directory_files from your previous assignment.
If you got less than 25 out of 30 on assignment 3, you may use my implementation
without penalty. If you got over 25 on assignment 3 and you use my
directory_utilities implementation, your score on assignment 3
will be reduced to 25. My implmentation can be found in
/usr/local/courses/cs3733/spring2000/assign3.
int play_word(char *str);
which plays the audiofile corresponding to the word str.
This just appends .au to str and looks up the corresponding
entry in the the array created by get_directory_files, and sends the
corresponding data to the audio device. The function returns the size
of the audio file, or -1 if it is not in the list. In checking the name of the
file, use strcasecmp instead of strcmp so that the
difference between upper and lower case letters is ignored.
Add the function:
int play_sentence(char *str, int delay)
to the audio object. It parses the string into words and plays the words
one at a time. It pauses delay milliseconds between words.
It returns 0 on success and -1 if any of the words could
not be found or another error occurred. Use usleep for the delay,
but note that usleep sleeps for a given number of microseconds.
You may assume that the delay argument is less than 1000.
int play_integer(unsigned int n)
which plays the integer one digit at a time.
It returns 0 on success and -1 on failure.
For example, if n = 1352,
you would hear the words "one three five two."
Do not include any delay between the individual digits.
testpart3 "this program was written by yourname"
Modify play_word so that if the word passed contains only a
string of digits, it will use play_integer to play this word.
In this case it should return 0.
This program was written by ...
where it says your name at the end.
The second sentence will be of the form:
This process has ID x and the parent process has ID y.
where x and y are replaced by the appropriate process IDs.
Print out all of your source code and hand it in.
Be prepared to demonstrate your programs.