Merge pull request #1487 from pipecat-ai/smallwebrtc_ios_support

SmallWebRTCTransport: Improvements to work with mobile

examples/p2p-webrtc/video-transform/client/typescript/src/style.css

@@ -32,6 +32,7 @@ select {
 
 .status-bar {
     display: flex;
+    flex-wrap: wrap;
     justify-content: space-between;
     align-items: center;
     padding: 10px;
@@ -69,6 +70,7 @@ button:disabled {
     padding: 20px;
     margin-bottom: 20px;
     display: flex;
+    flex-wrap: wrap;
 }
 
 .bot-container {
@@ -79,8 +81,8 @@ button:disabled {
 }
 
 #bot-video-container {
-    width: 640px;
-    height: 360px;
+    width: 90%;
+    aspect-ratio: 16 / 9;
     background-color: #e0e0e0;
     border-radius: 8px;
     overflow: hidden;
@@ -98,10 +100,18 @@ button:disabled {
 .debug-panel {
     background-color: #fff;
     border-radius: 8px;
-    padding-left: 20px;
     width: 50%;
 }
 
+@media (max-width: 768px) {
+    .bot-container {
+        width: 100%;
+    }
+    .debug-panel {
+        width: 100%;
+    }
+}
+
 .debug-panel h3 {
     margin: 0 0 10px 0;
     font-size: 16px;
@@ -109,10 +119,9 @@ button:disabled {
 }
 
 #debug-log {
-    height: 500px;
+    height: 360px;
     overflow-y: auto;
     background-color: #f8f8f8;
-    padding: 10px;
     border-radius: 4px;
     font-family: monospace;
     font-size: 12px;

src/pipecat/transports/network/small_webrtc.py

@@ -138,6 +138,13 @@ class RawVideoTrack(VideoStreamTrack):
 
 
 class SmallWebRTCClient:
+    FORMAT_CONVERSIONS = {
+        "yuv420p": cv2.COLOR_YUV2RGB_I420,
+        "yuvj420p": cv2.COLOR_YUV2RGB_I420,  # OpenCV treats both the same
+        "nv12": cv2.COLOR_YUV2RGB_NV12,
+        "gray": cv2.COLOR_GRAY2RGB,
+    }
+
     def __init__(self, webrtc_connection: SmallWebRTCConnection, callbacks: SmallWebRTCCallbacks):
         self._webrtc_connection = webrtc_connection
         self._closing = False
@@ -176,6 +183,30 @@ class SmallWebRTCClient:
         async def on_app_message(connection: SmallWebRTCConnection, message: Any):
             await self._handle_app_message(message)
 
+    def _convert_frame(self, frame_array: np.ndarray, format_name: str) -> np.ndarray:
+        """
+        Convert a given frame to RGB format based on the input format.
+
+        Args:
+            frame_array (np.ndarray): The input frame.
+            format_name (str): The format of the input frame.
+
+        Returns:
+            np.ndarray: The converted RGB frame.
+
+        Raises:
+            ValueError: If the format is unsupported.
+        """
+        if format_name.startswith("rgb"):  # Already in RGB, no conversion needed
+            return frame_array
+
+        conversion_code = SmallWebRTCClient.FORMAT_CONVERSIONS.get(format_name)
+
+        if conversion_code is None:
+            raise ValueError(f"Unsupported format: {format_name}")
+
+        return cv2.cvtColor(frame_array, conversion_code)
+
     async def read_video_frame(self):
         """
         Reads a video frame from the given MediaStreamTrack, converts it to RGB,
@@ -203,21 +234,9 @@ class SmallWebRTCClient:
                 continue
 
             format_name = frame.format.name
-
             # Convert frame to NumPy array in its native format
             frame_array = frame.to_ndarray(format=format_name)
-
-            # Handle different formats dynamically
-            if format_name == "yuv420p":
-                frame_rgb = cv2.cvtColor(frame_array, cv2.COLOR_YUV2RGB_I420)
-            elif format_name == "nv12":
-                frame_rgb = cv2.cvtColor(frame_array, cv2.COLOR_YUV2RGB_NV12)
-            elif format_name == "gray":
-                frame_rgb = cv2.cvtColor(frame_array, cv2.COLOR_GRAY2RGB)
-            elif format_name.startswith("rgb"):  # Already RGB, no conversion needed
-                frame_rgb = frame_array
-            else:
-                raise ValueError(f"Unsupported format: {format_name}")
+            frame_rgb = self._convert_frame(frame_array, format_name)
 
             image_frame = InputImageRawFrame(
                 image=frame_rgb.tobytes(),