Begin work on examples/script.c scene script demo

1 files changed, 125 insertions, 0 deletions

diff --git a/examples/script.c b/examples/script.c
new file mode 100644
index 0000000..f9faccc
--- /dev/null
+++ b/examples/script.c
@@ -0,0 +1,125 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdarg.h>
+#include <string.h>
+#include <sysexits.h>
+#include <fcntl.h>
+#include <math.h>
+
+#include <xas/vox.h>
+#include <xas/audio.h>
+#include <xas/riff.h>
+#include <xas/spatial.h>
+#include <xas/script.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_spatial_scene *scene;
+    xas_script *script;
+
+    xas_spatial_object *synth_l,
+                         *synth_r,
+                         *voice;
+
+    xas_audio_stream *output,
+                       *wave;
+
+    xas_audio_format format = {
+        .channels    = XAS_AUDIO_STEREO,
+        .sample_size = XAS_AUDIO_PCM_16_BIT,
+        .sample_rate = 44100
+    };
+
+    size_t buffer_size = 735;
+
+    xas_spatial_coord speakers[2] = {
+        { -0.09, 0.0, 0.0 },
+        {  0.09, 0.0, 0.0 }
+    };
+
+    if (argc != 2) {
+        usage(argc, argv, "No output file provided");
+    }
+
+    if ((wave = xas_riff_new_file(argv[1],
+                                    format,
+                                    O_WRONLY | O_CREAT | O_TRUNC)) == NULL) {
+        goto error_riff_new_file;
+    }
+
+    if ((scene = xas_spatial_scene_new(format,
+                                         speakers[0],
+                                         speakers[1])) == NULL) {
+        goto error_spatial_scene_new;
+    }
+
+    if ((script = xas_script_new(scene, buffer_size)) == NULL) {
+        goto error_script_new;
+    }
+
+    if ((voice = xas_spatial_scene_add_vox(scene,
+                                             (xas_spatial_coord){ 0.0, 0.0, -20.0 },
+                                             "/usr/bin/text2wave")) == NULL) {
+        goto error_spatial_scene_add_vox;
+    }
+
+    if ((synth_l = xas_spatial_scene_add_synth(scene,
+                                                 (xas_spatial_coord){ -20.0, 0.0, 0.0 },
+                                                 XAS_SYNTH_SINE)) == NULL) {
+        goto error_spatial_scene_add_synth_l;
+    }
+
+    if ((synth_r = xas_spatial_scene_add_synth(scene,
+                                                 (xas_spatial_coord){ 20.0, 0.0, 0.0 },
+                                                 XAS_SYNTH_SINE)) == NULL) {
+        goto error_spatial_scene_add_synth_r;
+    }
+
+    if ((output = xas_spatial_scene_stream_new(scene,
+                                                 buffer_size)) == NULL) {
+        goto error_spatial_scene_stream_new;
+    }
+
+    xas_vox_set_parameter_float(voice->ctx, "Duration_Stretch", 1.3);
+
+    xas_script_add_set_frequency(script, synth_l, (struct timeval){ 0, 0 }, 220);
+    xas_script_add_event_on( script, synth_l, (struct timeval){ 0, 0 });
+    xas_script_add_event_off(script, synth_l, (struct timeval){ 60, 0 });
+
+    xas_script_destroy(script);
+    xas_spatial_scene_destroy(scene);
+    xas_audio_stream_destroy(wave);
+
+    return EX_OK;
+
+error_spatial_scene_stream_new:
+error_spatial_scene_add_synth_r:
+error_spatial_scene_add_synth_l:
+error_spatial_scene_add_vox:
+    xas_script_destroy(script);
+
+error_script_new:
+    xas_spatial_scene_destroy(scene);
+
+error_spatial_scene_new:
+    xas_audio_stream_destroy(wave);
+
+error_riff_new_file:
+    return EX_OSERR;
+}