server/tests: add test_playback

1 files changed, 99 insertions, 0 deletions

diff --git a/server/tests/test_playback.c b/server/tests/test_playback.c
new file mode 100644
index 00000000..18220eab
--- /dev/null
+++ b/server/tests/test_playback.c
@@ -0,0 +1,99 @@
+#include <stdio.h>
+#include <strings.h>
+#include <sys/select.h>
+#include <math.h>
+
+#include <spice.h>
+#include "test_util.h"
+#include "basic_event_loop.h"
+
+/* test the audio playback interface. Really basic no frils test - create
+ * a single tone sinus sound (easy to hear clicks if it is generated badly
+ * or is transmitted badly).
+ *
+ * TODO: Was going to do white noise to test compression too.
+ *
+ * TODO: gstreamer based test (could be used to play music files so
+ * it has actual merit. Also possibly to simulate network effects?)
+ * */
+
+SpicePlaybackInstance playback_instance;
+
+static const SpicePlaybackInterface playback_sif = {
+    .base.type          = SPICE_INTERFACE_PLAYBACK,
+    .base.description   = "test playback",
+    .base.major_version = SPICE_INTERFACE_PLAYBACK_MAJOR,
+    .base.minor_version = SPICE_INTERFACE_PLAYBACK_MINOR,
+};
+
+uint32_t *frame;
+uint32_t num_samples;
+SpiceTimer *playback_timer;
+int playback_timer_ms;
+SpiceCoreInterface *core;
+
+void playback_timer_cb(void *opaque)
+{
+    static int t = 0;
+    static uint64_t last_sent_usec = 0;
+    static uint64_t samples_to_send;
+    int i;
+    struct timeval cur;
+    uint64_t cur_usec;
+    uint32_t batches;
+
+    if (!frame) {
+        spice_server_playback_get_buffer(&playback_instance, &frame, &num_samples);
+        if (frame) {
+            playback_timer_ms = num_samples ? 1000*num_samples/SPICE_INTERFACE_PLAYBACK_FREQ : 100;
+        } else {
+            /* continue waiting until there is a channel */
+            core->timer_start(playback_timer, playback_timer_ms);
+            return;
+        }
+    }
+    /* we have a channel */
+    gettimeofday(&cur, NULL);
+    cur_usec = cur.tv_usec + cur.tv_sec * 1e6;
+    if (last_sent_usec == 0) {
+        samples_to_send = num_samples;
+    } else {
+        samples_to_send += (cur_usec - last_sent_usec) * SPICE_INTERFACE_PLAYBACK_FREQ / 1e6;
+    }
+    last_sent_usec = cur_usec;
+    batches = samples_to_send / num_samples;
+#if 0
+    printf("samples_to_send = %d, batches = %d\n", samples_to_send, batches);
+#endif
+    samples_to_send -= num_samples * batches;
+    for (;batches > 0 ; --batches) {
+        for (i = 0 ; i < num_samples; ++i) {
+            frame[i] = (((uint16_t)((1<<14)*sin((t+i)/10))) << 16) + (((uint16_t)((1<<14)*sin((t+i)/10))));
+        }
+        t += num_samples;
+        spice_server_playback_put_samples(&playback_instance, frame);
+    }
+    core->timer_start(playback_timer, playback_timer_ms);
+}
+
+int main()
+{
+    SpiceServer *server = spice_server_new();
+    core = basic_event_loop_init();
+
+    spice_server_set_port(server, 5701);
+    spice_server_set_noauth(server);
+    spice_server_init(server, core);
+
+    playback_instance.base.sif = &playback_sif.base;
+    spice_server_add_interface(server, &playback_instance.base);
+    spice_server_playback_start(&playback_instance);
+
+    playback_timer_ms = 100;
+    playback_timer = core->timer_add(playback_timer_cb, NULL);
+    core->timer_start(playback_timer, playback_timer_ms);
+
+    basic_event_loop_mainloop();
+
+    return 0;
+}