[PATCH spice-protocol v3 2/5] Add a message to control guest streaming

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Allows server to tell codec and start/stop the streaming
---
 spice/stream-device.h | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/spice/stream-device.h b/spice/stream-device.h
index 427095b..0185fbd 100644
--- a/spice/stream-device.h
+++ b/spice/stream-device.h
@@ -81,6 +81,8 @@ typedef enum StreamMsgType {
     STREAM_TYPE_FORMAT,
     /* stream data */
     STREAM_TYPE_DATA,
+    /* server ask to start a new stream */
+    STREAM_TYPE_START_STOP,
 } StreamMsgType;
 
 /* Generic extension capabilities.
@@ -125,4 +127,21 @@ typedef struct StreamMsgData {
     uint8_t data[0];
 } StreamMsgData;
 
+/* Tell to stop current stream and possibly start a new one.
+ * This message is sent by the host to the guest.
+ * Allows to communicate the codecs supported by the clients.
+ * The agent should stop the old stream and if any codec in the
+ * list is supported start streaming (as Mjpeg is always supported
+ * agent should stop only on a real stop request).
+ *
+ * States allowed: any
+ *   state will change to Idle (no codecs) or Ready
+ */
+typedef struct StreamMsgStartStop {
+    /* supported codecs, 0 to stop streaming */
+    uint8_t num_codecs;
+    /* as defined in SpiceVideoCodecType enumeration */
+    uint8_t codecs[0];
+} StreamMsgStartStop;
+
 #endif /* SPICE_STREAM_DEVICE_H_ */
-- 
2.13.5

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