first commit

play_raw_audio.c

@@ -0,0 +1,54 @@
+// install libpulse-dev or libpulse package depending on your distro
+// compile: gcc -Wall play_raw_audio_file.c -lpulse-simple
+
+#include "play_raw_audio.h"
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <pulse/simple.h>
+#include <pulse/error.h>
+
+int play_raw_audio(char file_name[]) {
+	int pa_error = 0;
+    char content[1024] = "";
+
+    int myfd = open(file_name, O_RDONLY);
+	if (myfd == -1) {
+		perror("Failed to open audio file");
+		return 1;
+	}
+
+    pa_simple* simple = NULL;
+    pa_sample_spec ss;
+    ss.format = PA_SAMPLE_S16LE;
+    ss.rate = 48000;
+    ss.channels = 2;
+
+    // Temporarily redirect stderr to /dev/null
+	// because pulseaudio prints to stderr even though it does not set any error codes
+	FILE *original_stderr = stderr;
+	stderr = fopen("/dev/null", "w");
+
+    simple = pa_simple_new(NULL, "Audio Playback", PA_STREAM_PLAYBACK, NULL, "playback", &ss, NULL, NULL, &pa_error);
+
+	// Restore stderr
+	stderr = original_stderr;
+
+    int i = 0;
+    while (read(myfd, content, sizeof(content))) {
+      // skip the first 1024 bytes to not play the file header
+      if (i != 0) {
+		pa_simple_write(simple, content, sizeof(content), &pa_error);
+      }
+      i++;
+    }
+
+    pa_simple_drain(simple, NULL);
+
+    pa_simple_free(simple);
+
+    close(myfd);
+
+    return 0;
+}
+