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package invalid.lena.scrcpy;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertNotNull;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
public class VideoStreamTest {
// ---- recording sink ----
private static final class RecordingFrames implements VideoFrames {
static final class Cfg { final int fourcc, w, h; Cfg(int f,int w,int h){this.fourcc=f;this.w=w;this.h=h;} }
static final class Feed { final byte[] data; final long ptsUs; final boolean isCfg, isKey;
Feed(byte[] d,long p,boolean c,boolean k){data=d;ptsUs=p;isCfg=c;isKey=k;} }
final List<Cfg> configs = new ArrayList<>();
final List<Cfg> reconfigs = new ArrayList<>();
final List<Feed> feeds = new ArrayList<>();
int releases = 0;
@Override public void configure(int f, int w, int h) { configs.add(new Cfg(f, w, h)); }
@Override public void reconfigure(int f, int w, int h) { reconfigs.add(new Cfg(f, w, h)); }
@Override public void feed(byte[] d, long pts, boolean c, boolean k){ feeds.add(new Feed(d, pts, c, k)); }
@Override public void release() { releases++; }
}
// ---- byte builders ----
private static byte[] fourcc(int v) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
new DataOutputStream(bos).writeInt(v);
return bos.toByteArray();
}
private static byte[] sessionMeta(int w, int h, boolean clientResize) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(bos);
out.writeInt(0x80000000 | (clientResize ? 1 : 0));
out.writeInt(w);
out.writeInt(h);
return bos.toByteArray();
}
private static byte[] frame(long ptsAndFlags, byte[] payload) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
DataOutputStream out = new DataOutputStream(bos);
out.writeLong(ptsAndFlags);
out.writeInt(payload.length);
out.write(payload);
return bos.toByteArray();
}
private static byte[] cat(byte[]... parts) throws IOException {
ByteArrayOutputStream bos = new ByteArrayOutputStream();
for (byte[] p : parts) bos.write(p);
return bos.toByteArray();
}
private static void runUntilEof(VideoStream s) {
s.run(); // returns when the InputStream hits EOF (IOException)
}
// ---- tests ----
@Test
public void happyPath_configureCsdKeyframeDelta() throws Exception {
byte[] csd = new byte[]{0x67, 0x42, (byte)0xe0, 0x1e}; // bogus SPS-ish
byte[] keyframe = new byte[]{1, 2, 3, 4, 5};
byte[] delta = new byte[]{6, 7, 8};
long PTS_CFG = 1L << 62; // CONFIG
long PTS_KEY = (1L << 61) | 1_000_000L; // KEYFRAME, pts=1s
long PTS_DELT = 2_000_000L; // pts=2s
byte[] bytes = cat(
fourcc(Wire.CODEC_H264),
sessionMeta(1080, 2400, false),
frame(PTS_CFG, csd),
frame(PTS_KEY, keyframe),
frame(PTS_DELT, delta));
RecordingFrames sink = new RecordingFrames();
VideoStream s = new VideoStream(new ByteArrayInputStream(bytes), sink,
(w, h) -> {});
runUntilEof(s);
assertEquals(1, sink.configs.size());
assertEquals(Wire.CODEC_H264, sink.configs.get(0).fourcc);
assertEquals(1080, sink.configs.get(0).w);
assertEquals(2400, sink.configs.get(0).h);
assertEquals(3, sink.feeds.size());
assertTrue("first is config", sink.feeds.get(0).isCfg);
assertEquals(0L, sink.feeds.get(0).ptsUs); // CONFIG strips pts to 0
assertEquals(4, sink.feeds.get(0).data.length);
// keyframe: keyframe flag is stripped from ptsUs
assertEquals(1_000_000L, sink.feeds.get(1).ptsUs);
assertEquals(5, sink.feeds.get(1).data.length);
assertTrue("second is keyframe", sink.feeds.get(1).isKey);
assertEquals(2_000_000L, sink.feeds.get(2).ptsUs);
}
@Test
public void sessionMetaResizeTriggersReconfigure() throws Exception {
byte[] bytes = cat(
fourcc(Wire.CODEC_H264),
sessionMeta(1080, 2400, false),
frame(1L << 62, new byte[]{1}), // config
sessionMeta(720, 1600, true), // resize
frame(1L << 61, new byte[]{2})); // keyframe at new size
RecordingFrames sink = new RecordingFrames();
new VideoStream(new ByteArrayInputStream(bytes), sink, null).run();
assertEquals(1, sink.configs.size());
assertEquals(1, sink.reconfigs.size());
assertEquals(720, sink.reconfigs.get(0).w);
assertEquals(1600, sink.reconfigs.get(0).h);
}
@Test
public void sizeListenerFiresOnEachSessionMeta() throws Exception {
byte[] bytes = cat(
fourcc(Wire.CODEC_H264),
sessionMeta(1080, 2400, false),
frame(1L << 62, new byte[]{1}),
sessionMeta(720, 1600, false),
frame(1L << 61, new byte[]{2}));
List<int[]> sizes = new ArrayList<>();
RecordingFrames sink = new RecordingFrames();
new VideoStream(new ByteArrayInputStream(bytes), sink,
(w, h) -> sizes.add(new int[]{w, h})).run();
assertEquals(2, sizes.size());
assertEquals(1080, sizes.get(0)[0]);
assertEquals(720, sizes.get(1)[0]);
}
@Test
public void disabledCodecExits() throws Exception {
byte[] bytes = fourcc(0);
RecordingFrames sink = new RecordingFrames();
new VideoStream(new ByteArrayInputStream(bytes), sink, null).run();
assertEquals(0, sink.configs.size());
assertEquals(0, sink.feeds.size());
}
@Test
public void frameBeforeSessionMetaIsRejected() throws Exception {
// A frame header arriving without a preceding session-meta should
// raise - the stream is unconfigured.
byte[] bytes = cat(
fourcc(Wire.CODEC_H264),
frame(1L << 62, new byte[]{1, 2, 3})); // config-flag set, but no meta first
RecordingFrames sink = new RecordingFrames();
new VideoStream(new ByteArrayInputStream(bytes), sink, null).run();
// The loop should have aborted without feeding anything.
assertEquals(0, sink.feeds.size());
assertEquals(0, sink.configs.size());
}
@Test
public void payloadIntegrity() throws Exception {
byte[] payload = new byte[1024];
for (int i = 0; i < payload.length; i++) payload[i] = (byte) (i & 0xff);
byte[] bytes = cat(
fourcc(Wire.CODEC_H264),
sessionMeta(640, 480, false),
frame(1L << 62, payload));
RecordingFrames sink = new RecordingFrames();
new VideoStream(new ByteArrayInputStream(bytes), sink, null).run();
assertNotNull(sink.feeds.isEmpty() ? null : sink.feeds.get(0));
byte[] got = sink.feeds.get(0).data;
assertEquals(payload.length, got.length);
for (int i = 0; i < payload.length; i++) {
assertEquals("byte " + i, payload[i], got[i]);
}
}
}
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