audio/pcm: Add a proram to play audio files

2 files changed, 55 insertions, 0 deletions

diff --git a/userland/pcm/Makefile b/userland/pcm/Makefile
new file mode 100644
index 0000000..7a558a3
--- /dev/null
+++ b/userland/pcm/Makefile
@@ -0,0 +1,15 @@
+CC="i686-sb-gcc"
+CFLAGS=-ggdb -O0 -Wall -Wextra -pedantic
+LDFLAGS=
+BIN=pcm
+OBJ=pcm.o
+all: $(BIN)
+
+%.o: %.c
+	$(CC) $(CFLAGS) -o $@ -c $<
+
+$(BIN): $(OBJ)
+	$(CC) $(CFLAGS) $(LDFLAGS) -o $@ $^
+
+clean:
+	rm $(BIN) $(OBJ)
diff --git a/userland/pcm/pcm.c b/userland/pcm/pcm.c
new file mode 100644
index 0000000..780bbeb
--- /dev/null
+++ b/userland/pcm/pcm.c
@@ -0,0 +1,40 @@
+#include <assert.h>
+#include <fcntl.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int main(int argc, char **argv) {
+  if (argc < 2) {
+    printf("provide command line arguments dumbass\n");
+    return 1;
+  }
+
+  char *filename = argv[1];
+  int fd = open(filename, O_READ, 0);
+  if (-1 == fd) {
+    perror("open");
+    return 1;
+  }
+  int audio_fd = open("/dev/audio", O_WRITE, 0);
+  if (-1 == audio_fd) {
+    perror("open");
+    return 1;
+  }
+
+  char *buffer = malloc(128000);
+
+  for (;;) {
+    int rc;
+    if (0 == (rc = read(fd, buffer, 128000))) {
+      break;
+    }
+    write(audio_fd, buffer, rc);
+  }
+
+  free(buffer);
+  close(audio_fd);
+  close(fd);
+  return 0;
+}