From 647b2eda0a033b7c966ec38d2b3d86275307112d Mon Sep 17 00:00:00 2001
From: XANTRONIX Development
Date: Tue, 1 Feb 2022 20:44:47 -0500
Subject: Add examples/say.c

---
 examples/Makefile |   2 +-
 examples/say.c    | 120 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 121 insertions(+), 1 deletion(-)
 create mode 100644 examples/say.c

diff --git a/examples/Makefile b/examples/Makefile
index 20adaea..537d103 100644
--- a/examples/Makefile
+++ b/examples/Makefile
@@ -7,7 +7,7 @@ INCLUDE_PATH	= ../include
 CFLAGS		+= -I$(INCLUDE_PATH)
 LDFLAGS		+= -L../src -lxas -lm
 
-EXAMPLES	= test open
+EXAMPLES	= test open say
 
 all: $(EXAMPLES)
 
diff --git a/examples/say.c b/examples/say.c
new file mode 100644
index 0000000..92d2b19
--- /dev/null
+++ b/examples/say.c
@@ -0,0 +1,120 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sysexits.h>
+#include <fcntl.h>
+#include <math.h>
+
+#include <xas/audio.h>
+#include <xas/mixer.h>
+#include <xas/riff.h>
+#include <xas/vox.h>
+
+static void usage(int argc, char **argv, const char *message, ...) {
+    va_list args;
+
+    va_start(args, message);
+
+    if (message) {
+        vfprintf(stderr, message, args);
+        fputc('\n', stderr);
+    }
+
+    va_end(args);
+
+    fprintf(stderr, "usage: %s output.wav\n", argv[0]);
+
+    exit(EX_USAGE);
+}
+
+int main(int argc, char **argv) {
+    xas_mixer *mixer;
+
+    xas_audio_stream *input,
+                       *output;
+
+    xas_vox *vox;
+
+    size_t sample_rate = 44100,
+           buffer_size =  4096,
+           duration_s  =    60,
+           i;
+
+    if (argc != 2) {
+        usage(argc, argv, "No output file provided");
+    }
+
+    if ((output = xas_riff_new_file(argv[1],
+                                      XAS_AUDIO_STREAM_PCM_16_BIT,
+                                      sample_rate,
+                                      XAS_AUDIO_STREAM_STEREO,
+                                      O_WRONLY | O_CREAT | O_TRUNC)) == NULL) {
+        goto error_riff_new_file;
+    }
+
+    if ((vox = xas_vox_new("/usr/bin/text2wave",
+                             XAS_AUDIO_STREAM_PCM_16_BIT,
+                             sample_rate,
+                             buffer_size,
+                             NULL)) == NULL) {
+        goto error_vox_new;
+    }
+
+    if ((input = xas_vox_stream_new(vox)) == NULL) {
+        goto error_vox_stream_new;
+    }
+
+    if ((mixer = xas_mixer_new(XAS_AUDIO_STREAM_PCM_16_BIT,
+                                 sample_rate,
+                                 XAS_AUDIO_STREAM_STEREO,
+                                 buffer_size)) == NULL) {
+        goto error_mixer_new;
+    }
+
+    if (xas_mixer_input_add(mixer, input, 1.0, -1.0) == NULL) {
+        goto error_mixer_input_add;
+    }
+
+    xas_vox_say(vox, "I want to eat your soul.  You don't understand.  I really want to eat your soul.\n");
+
+    for (i=0; i<duration_s; i++) {
+        void *buf;
+        ssize_t readlen;
+
+        if ((readlen = xas_audio_stream_read(mixer->output,
+                                               &buf,
+                                               buffer_size)) < 0) {
+            goto error_audio_stream_read;
+        }
+
+        if (xas_audio_stream_write(output, buf, readlen) < 0) {
+            goto error_audio_stream_write;
+        }
+    }
+
+    xas_audio_stream_flush(output);
+
+    xas_mixer_destroy(mixer);
+    xas_audio_stream_destroy(input);
+    xas_audio_stream_destroy(output);
+
+    return EX_OK;
+
+error_audio_stream_write:
+error_audio_stream_read:
+error_mixer_input_add:
+    xas_mixer_destroy(mixer);
+
+error_mixer_new:
+    xas_audio_stream_destroy(input);
+
+error_vox_stream_new:
+    xas_vox_destroy(vox);
+
+error_vox_new:
+    xas_audio_stream_destroy(output);
+
+error_riff_new_file:
+    return EX_OSERR;
+}
-- 
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