1 files changed, 116 insertions, 0 deletions
diff --git a/usr.bin/aucat/wav.c b/usr.bin/aucat/wav.c
new file mode 100644
index 00000000000..ae85e809f13
--- /dev/null
+++ b/usr.bin/aucat/wav.c
@@ -0,0 +1,116 @@
+#include <sys/types.h>
+#include <err.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+#include "conf.h"
+#include "wav.h"
+
+/*
+ * max data of a .wav file. The total file size must be smaller than
+ * 2^31, and we also have to leave some space for the headers (around 40
+ * bytes)
+ */ 
+#define WAV_DATAMAX	(0x7fff0000)
+
+struct fileops wav_ops = {
+	"wav",
+	sizeof(struct wav),
+	wav_close,
+	wav_read,
+	wav_write,
+	NULL, /* start */
+	NULL, /* stop */
+	pipe_nfds,
+	pipe_pollfd,
+	pipe_revents
+};
+
+struct wav *
+wav_new_in(struct fileops *ops, int fd, char *name,
+    struct aparams *par, unsigned hdr)
+{
+	struct wav *f;
+
+	f = (struct wav *)pipe_new(ops, fd, name);
+	if (hdr == HDR_WAV) {
+		if (!wav_readhdr(f->pipe.fd, par, &f->rbytes))
+			exit(1);
+		f->hpar = *par;
+	} else
+		f->rbytes = -1;
+	f->hdr = 0;
+	return f;
+}
+
+struct wav *
+wav_new_out(struct fileops *ops, int fd, char *name,
+    struct aparams *par, unsigned hdr)
+{
+	struct wav *f;
+
+	f = (struct wav *)pipe_new(ops, fd, name);
+	if (hdr == HDR_WAV) {
+		if (!wav_writehdr(f->pipe.fd, par))
+			exit(1);
+		f->hpar = *par;
+		f->wbytes = WAV_DATAMAX;
+	} else
+		f->wbytes = -1;
+	f->hdr = hdr;
+	return f;
+}
+
+unsigned
+wav_read(struct file *file, unsigned char *data, unsigned count)
+{
+	struct wav *f = (struct wav *)file;
+	unsigned n;
+
+	if (f->rbytes >= 0 && count > f->rbytes) {
+		count = f->rbytes; /* file->rbytes fits in count */
+		if (count == 0) {
+			DPRINTFN(2, "wav_read: %s: complete\n", f->pipe.file.name);
+			file_eof(&f->pipe.file);
+			return 0;
+		}
+	}
+	n = pipe_read(file, data, count);
+	if (f->rbytes >= 0)
+		f->rbytes -= n;
+	return n;
+}
+
+
+unsigned
+wav_write(struct file *file, unsigned char *data, unsigned count)
+{
+	struct wav *f = (struct wav *)file;
+	unsigned n;
+	
+	if (f->wbytes >= 0 && count > f->wbytes) {
+		count = f->wbytes; /* wbytes fits in count */
+		if (count == 0) {
+			DPRINTFN(2, "wav_write: %s: complete\n",
+			    f->pipe.file.name);
+			file_hup(&f->pipe.file);
+			return 0;
+		}
+	}
+	n = pipe_write(file, data, count);
+	if (f->wbytes >= 0)
+		f->wbytes -= n;
+	return n;
+}
+
+void
+wav_close(struct file *file)
+{
+	struct wav *f = (struct wav *)file;
+
+	if (f->hdr == HDR_WAV)
+		wav_writehdr(f->pipe.fd, &f->hpar);
+	pipe_close(file);
+}