Negotiate actual Android modes and replace single encoder on IDR

tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoEngine.kt

@@ -35,8 +35,8 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
     private val manager = context.getSystemService(CameraManager::class.java)
     private val player = CallVideoPlayer(id) { message -> handler.post { report(message) } }
     @Volatile private var stopped = false
-    private var encoders = emptyMap<Int, String>()
-    private var caps = ByteArray(80)
+    private var encoders = emptyMap<Int, CallVideoCodec.Companion.Encoder>()
+    private var caps = ByteArray(64)
     private var wanted = CallVideoSettings()
     private var active: CallVideoSettings? = null
     private var format: CallVideoFormat? = null
@@ -67,6 +67,8 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
     init {
         handler.post {
             try {
+                val decoders = CallVideoCodec.probeDecoders()
+                player.decoders(decoders)
                 encoders = CallVideoCodec.probe()
                 if (stopped) return@post
                 val cameras = CameraLensManager.enumerate(manager).mapNotNull { lens ->
@@ -76,15 +78,17 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
                     if (sizes.isEmpty()) null else CallVideoCamera(lens.cameraId, lens.label, sizes)
                 }
                 val bytes = ByteBuffer.wrap(caps).order(ByteOrder.BIG_ENDIAN)
-                repeat(2) { for (codec in 1..2) {
-                    if (encoders.containsKey(codec)) bytes.putShort(1280).putShort(720).putShort(30).putInt(1280 * 720 * 30)
-                        .putInt(4_000_000).putInt(1_000_000).put(if (codec == 1) 31 else 93).put(0)
-                    else bytes.position(bytes.position() + 20)
+                repeat(2) { direction -> for (codec in 1..2) {
+                    val profile = if (direction == 0) encoders[codec]?.profile else decoders[codec]?.profiles
+                    val level = if (direction == 0) encoders[codec]?.level else if (codec == 1) 31 else 93
+                    if (profile != null && level != null) bytes.putShort(1280).putShort(720).putShort(30).putInt(1280 * 720 * 30)
+                        .putInt(4_000_000).put(level.toByte()).put(profile.toByte())
+                    else bytes.position(bytes.position() + 16)
                 } }
                 check(CallVideoNative.open(id, caps)) { "Video port unavailable" }
                 wanted = wanted.copy(camera = cameras.firstOrNull()?.id.orEmpty())
                 mutable.value = mutable.value.copy(ready = true, cameras = cameras, codecs = encoders.keys.toList(), settings = wanted)
-                report(if (encoders.isEmpty()) "No verified video codec" else "Video ready")
+                report(if (encoders.isEmpty()) "Receive-only video" else "Video ready")
                 tick()
             } catch (e: Exception) { fail("Video setup: ${e.message}") }
         }
@@ -133,15 +137,35 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
         val cameraInfo = manager.getCameraCharacteristics(wanted.camera)
         val rotation = cameraInfo.get(CameraCharacteristics.SENSOR_ORIENTATION) ?: 0
         val desired = CallVideoFormat(++generation, wanted.width, wanted.height, rotation = rotation, codec = wanted.codec)
-        val selected = CallVideoNative.choose(caps, peer, desired.array()) ?: error("No common codec for selected resolution")
-        // MediaCodec получает фиксированный 3.1; ряд backend не умеет понижать маркировку level для меньшего размера.
-        val next = CallVideoFormat.from(selected).let { it.copy(level = if (it.codec == 1) 31 else 93) }
-        val candidate = CallVideoCodec(next, 1_000_000, checkNotNull(encoders[next.codec]))
-        closeCamera(); encoder?.close(); encoder = candidate; format = next; active = wanted
-        pendingRequest = 0; confirmingRequest = 0; request = 0; lastKey = -1; needKey = true; lastPts = -1
-        check(CallVideoNative.format(id, next.array(), candidate.bitrate)) { "Video format rejected" }
-        mutable.value = mutable.value.copy(bitrate = candidate.bitrate)
-        if (!closing) openCamera()
+        val previous = encoder; val previousFormat = format; val previousSettings = active
+        val previousName = previous?.name; val previousRate = previous?.bitrate
+        previous?.close(); encoder = null
+        for (codec in if (wanted.codec == 0) listOf(2, 1) else listOf(wanted.codec)) {
+            val implementation = encoders[codec] ?: continue
+            val selected = CallVideoNative.choose(caps, peer, desired.copy(codec = codec).array()) ?: continue
+            var candidate: CallVideoCodec? = null
+            try {
+                candidate = CallVideoCodec(CallVideoFormat.from(selected), 1_000_000, implementation.name)
+                candidate.prepare()
+                val next = candidate.format
+                check(CallVideoNative.supported(caps, peer, next.array())) { "Actual encoder format exceeds peer capabilities: $next" }
+                check(CallVideoNative.format(id, next.array(), candidate.bitrate)) { "Video format rejected" }
+                closeCamera(); encoder = candidate; format = next; active = wanted
+                pendingRequest = 0; confirmingRequest = 0; request = 0; lastKey = -1; needKey = true
+                mutable.value = mutable.value.copy(bitrate = candidate.bitrate)
+                if (!closing) openCamera()
+                return
+            } catch (e: Exception) {
+                candidate?.close()
+                LogManager.addLog("WARN", "call", "video mode rejected codec=$codec name=${implementation.name}: ${e.message}")
+            }
+        }
+        if (previousFormat != null && previousSettings != null && previousName != null && previousRate != null) {
+            encoder = CallVideoCodec(previousFormat, previousRate, previousName).also { it.prepare(); check(it.format == previousFormat) }
+            wanted = previousSettings; needKey = true
+            mutable.value = mutable.value.copy(settings = wanted)
+            report("Selected mode unavailable; previous video restored")
+        } else fail("No compatible encoder for selected video mode")
     }
     @SuppressLint("MissingPermission")
     private fun openCamera() {
@@ -152,7 +176,9 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
         sensorOffset = null
         val nextReader = ImageReader.newInstance(f.width, f.height, ImageFormat.YUV_420_888, 3); reader = nextReader
         nextReader.setOnImageAvailableListener({ source ->
-            val image = source.acquireLatestImage() ?: return@setOnImageAvailableListener
+            val image = try { source.acquireLatestImage() } catch (e: IllegalStateException) {
+                LogManager.addLog("WARN", "call", "closed camera reader token=$token/$cameraToken: ${e.message}"); null
+            } ?: return@setOnImageAvailableListener
             try {
                 if (stopped || token != cameraToken || !wanted.enabled) return@setOnImageAvailableListener
                 val now = System.nanoTime()
@@ -164,15 +190,21 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
                 val key = needKey || lastKey < 0 || pts - lastKey >= 1_000_000
                 if (key && pendingRequest != 0L) {
                     val requestId = pendingRequest; pendingRequest = 0
+                    val old = checkNotNull(encoder); val oldRate = old.bitrate; val name = old.name
+                    old.close(); encoder = null
                     try {
-                        val candidate = CallVideoCodec(f, pendingRate, checkNotNull(encoders[f.codec]))
-                        encoder?.close(); encoder = candidate; confirmingRequest = requestId; needKey = true
+                        encoder = CallVideoCodec(f, pendingRate, name)
+                        encoder!!.prepare(); check(encoder!!.format == f) { "Bitrate change altered encoder format" }
+                        confirmingRequest = requestId; needKey = true
                         report("Applying ${pendingRate / 1000} kbit/s on IDR")
                     } catch (e: Exception) {
-                        CallVideoNative.applied(id, f.generation, requestId, 0); throw e
+                        LogManager.addLog("WARN", "call", "video bitrate replacement failed: ${e.message}; restoring $oldRate")
+                        encoder?.close(); encoder = CallVideoCodec(f, oldRate, name)
+                        encoder!!.prepare(); check(encoder!!.format == f)
+                        confirmingRequest = requestId; needKey = true
                     }
                 }
-                if (encoder?.submit(image, pts, key) == true) { lastPts = pts; if (key) lastKey = pts }
+                if (encoder?.submit(image, pts, key) == true) lastPts = pts
                 drain()
             } catch (e: Exception) { fail("Camera encode: ${e.message}") }
             finally { image.close() }
@@ -215,6 +247,7 @@ class CallVideoEngine(private val context: Context, private val id: Long) {
         val codec = encoder ?: return; val f = format ?: return
         for (p in codec.drain()) {
             encodedBytes += p.bytes.size; encodedFrames++
+            if (p.key) lastKey = p.pts
             if (confirmingRequest != 0L && p.key) {
                 CallVideoNative.applied(id, f.generation, confirmingRequest, codec.bitrate); confirmingRequest = 0
                 mutable.value = mutable.value.copy(bitrate = codec.bitrate)

tools/chatgui-android/app/src/main/java/com/utun/chat/data/CallVideoPlayer.kt

@@ -7,8 +7,10 @@ import android.view.Surface
 internal class CallVideoPlayer(private val id: Long, private val failure: (String) -> Unit) {
     @Volatile private var running = true
     @Volatile private var target: Surface? = null
+    @Volatile private var verified = emptyMap<Int, CallVideoCodec.Companion.Decoder>()
     private val worker = Thread(::loop, "call-video-rx").apply { start() }
     fun surface(surface: Surface?) { target = surface }
+    fun decoders(value: Map<Int, CallVideoCodec.Companion.Decoder>) { verified = value }
     fun stop() { running = false; worker.join() }
 
     private fun loop() {
@@ -65,7 +67,9 @@ internal class CallVideoPlayer(private val id: Long, private val failure: (Strin
                                 if (!key) { pending = null; CallVideoNative.requestKey(id); continue }
                                 CallVideoCodec.validateKey(data, next)
                                 val type = StreamVideoCodec.fromId(next.codec); val config = type.unpackKey(data).first
-                                decoder = MediaCodec.createDecoderByType(type.mime)
+                                val implementation = checkNotNull(verified[next.codec]) { "No verified decoder" }
+                                check(implementation.profiles and next.profile != 0) { "Unsupported decoder profile" }
+                                decoder = MediaCodec.createByCodecName(implementation.name)
                                 decoder!!.configure(type.decoderFormat(next.width, next.height, next.rotation, config), surface, null, 0)
                                 decoder!!.start(); format = next; lastProgress = now
                                 LogManager.addLog("INFO", "call", "video decoder started call=$id format=$next")