libcamera: pipeline: ipu3: frames: Use the request sequence

For all frame indexes, use the same sequence number as generated
by the Request object.

This allows clear matching of what operations occurred to which request.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/libcamera/pipeline/ipu3/frames.cpp

@@ -18,7 +18,6 @@ namespace libcamera {
 LOG_DECLARE_CATEGORY(IPU3)
 
 IPU3Frames::IPU3Frames()
-	: nextId_(0)
 {
 }
 
@@ -31,7 +30,6 @@ void IPU3Frames::init(const std::vector<std::unique_ptr<FrameBuffer>> &paramBuff
 	for (const std::unique_ptr<FrameBuffer> &buffer : statBuffers)
 		availableStatBuffers_.push(buffer.get());
 
-	nextId_ = 0;
 	frameInfo_.clear();
 }
 
@@ -43,7 +41,7 @@ void IPU3Frames::clear()
 
 IPU3Frames::Info *IPU3Frames::create(Request *request)
 {
-	unsigned int id = nextId_++;
+	unsigned int id = request->sequence();
 
 	if (availableParamBuffers_.empty()) {
 		LOG(IPU3, Error) << "Parameters buffer underrun";

src/libcamera/pipeline/ipu3/frames.h

@@ -53,7 +53,6 @@ private:
 	std::queue<FrameBuffer *> availableParamBuffers_;
 	std::queue<FrameBuffer *> availableStatBuffers_;
 
-	unsigned int nextId_;
 	std::map<unsigned int, std::unique_ptr<Info>> frameInfo_;
 };