Do not queue invalid PTS

Configuration packets produced by MediaCodec have no valid PTS, and do
not produce frame. Do not queue their (invalid) PTS not to break the
matching between frames and their PTS.

app/src/decoder.c

@@ -19,6 +19,7 @@
 #define BUFSIZE 0x10000
 
 #define HEADER_SIZE 12
+#define NO_PTS UINT64_C(-1)
 
 static struct frame_meta *frame_meta_new(uint64_t pts) {
     struct frame_meta *meta = malloc(sizeof(*meta));
@@ -89,7 +90,7 @@ static int read_packet_with_meta(void *opaque, uint8_t *buf, int buf_size) {
         uint64_t pts = buffer_read64be(header);
         state->remaining = buffer_read32be(&header[8]);
 
-        if (!receiver_state_push_meta(state, pts)) {
+        if (pts != NO_PTS && !receiver_state_push_meta(state, pts)) {
             LOGE("Could not store PTS for recording");
             // we cannot save the PTS, the recording would be broken
             return -1;

server/src/main/java/com/genymobile/scrcpy/ScreenEncoder.java

@@ -23,6 +23,7 @@ public class ScreenEncoder implements Device.RotationListener {
     private static final int REPEAT_FRAME_DELAY = 6; // repeat after 6 frames
 
     private static final int MICROSECONDS_IN_ONE_SECOND = 1_000_000;
+    private static final int NO_PTS = -1;
 
     private final AtomicBoolean rotationChanged = new AtomicBoolean();
     private final ByteBuffer headerBuffer = ByteBuffer.allocate(12);
@@ -119,7 +120,7 @@ public class ScreenEncoder implements Device.RotationListener {
 
         long pts;
         if ((bufferInfo.flags & MediaCodec.BUFFER_FLAG_CODEC_CONFIG) != 0) {
-            pts = 0; // non-media data packet
+            pts = NO_PTS; // non-media data packet
         } else {
             if (ptsOrigin == 0) {
                 ptsOrigin = bufferInfo.presentationTimeUs;