Bound desktop decoder work and drain Android codec with monotonic EOS timestamps

tools/chatgui/src/streamplayer_window.cpp

@@ -309,6 +309,11 @@ void StreamPlayerWindow::decode() {
         int received;
         while ((received = avcodec_receive_frame(decoder, frame)) == 0) {
             decoded++;
+            if (frame->width <= 0 || frame->width > 4096 || frame->height <= 0 || frame->height > 4096) {
+                DEBUG_ERROR(DEBUG_CATEGORY_STREAM, "desktop H264 dimensions invalid id=%llu size=%dx%d",
+                            (unsigned long long)p.id, frame->width, frame->height);
+                fail(text("Invalid stream video dimensions")); p.running = false; break;
+            }
             int64_t pts = frame->best_effort_timestamp == AV_NOPTS_VALUE ? (int64_t)record.pts : frame->best_effort_timestamp;
             { std::lock_guard<std::mutex> guard(p.lock); if (pts < p.clock(nowUs()) - 100000) { discarded++; continue; } }
             converter = sws_getCachedContext(converter, frame->width, frame->height, (AVPixelFormat)frame->format,
@@ -322,6 +327,11 @@ void StreamPlayerWindow::decode() {
             }
             if (record.format.rotation) image = image.transformed(QTransform().rotate(record.format.rotation));
             std::lock_guard<std::mutex> guard(p.lock);
+            if (p.videos.size() >= 4) {
+                DEBUG_ERROR(DEBUG_CATEGORY_STREAM, "desktop video preparation exceeded id=%llu frames=%zu",
+                            (unsigned long long)p.id, p.videos.size());
+                fail(text("Stream video decoder failed")); p.running = false; break;
+            }
             p.videoBytes += (size_t)image.sizeInBytes(); p.videos.push_back({std::move(image), pts});
         }
         if (received != AVERROR(EAGAIN) && received != AVERROR_EOF && p.running) {