X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=bmusb%2Fbmusb.h;h=a484496bd6be5cd0aa83512258c0e87f75a79978;hb=HEAD;hp=a72ed8b04cc377ea57076ee309123a92cf34f85f;hpb=b18056fe32dd46134d7f12165bfa083378f2d9bb;p=bmusb

diff --git a/bmusb/bmusb.h b/bmusb/bmusb.h
index a72ed8b..cec84d9 100644
--- a/bmusb/bmusb.h
+++ b/bmusb/bmusb.h
@@ -31,6 +31,7 @@ class FrameAllocator {
 	struct Frame {
 		uint8_t *data = nullptr;
 		uint8_t *data2 = nullptr;  // Only if interleaved == true.
+		uint8_t *data_copy = nullptr;  // Will get a non-interleaved copy if not nullptr.
 		size_t len = 0;  // Number of bytes we actually have.
 		size_t size = 0;  // Number of bytes we have room for.
 		size_t overflow = 0;
@@ -72,6 +73,22 @@ class FrameAllocator {
 	// if so, the frame in progress will be dropped.
 	virtual Frame alloc_frame() = 0;
 
+	// Similar to alloc_frame(), with two additional restrictions:
+	//
+	//  - The width, height and stride given must be correct
+	//    (can not be changed after the call).
+	//  - create_frame(), unlike alloc_frame(), is allowed to sleep
+	//    (so bmusb will never call it, but in Nageru, other producers
+	//    might)
+	//
+	// These two restrictions are relevant for Nageru, since it means that
+	// it can make frame_copy point directly into a VA-API buffer to avoid
+	// an extra copy.
+	virtual Frame create_frame(size_t width, size_t height, size_t stride)
+	{
+		return alloc_frame();
+	}
+
 	virtual void release_frame(Frame frame) = 0;
 };
 
@@ -162,7 +179,13 @@ enum PixelFormat {
 	// (ie., first all Y', then all Cb, then all Cr). bmusb doesn't
 	// produce this, nor does it specify a mechanism to describe
 	// the precise details of the format.
-	PixelFormat_8BitYCbCrPlanar
+	PixelFormat_8BitYCbCrPlanar,
+
+	// These exist only so that the type is guaranteed wide enough
+	// to contain values up to 127. CaptureInterface instances
+	// are free to use them as they see fit for private uses.
+	PixelFormat_Unused100 = 100,
+	PixelFormat_Unused127 = 127
 };
 
 typedef std::function<void(uint16_t timecode,