From 8e1549820b3ae47969c15cb0b61f6d171cca421e Mon Sep 17 00:00:00 2001
From: jp9000 <obs.jim@gmail.com>
Date: Wed, 31 Dec 2014 00:29:51 -0800
Subject: [PATCH] libobs/media-io: Add frame copying function

---
 libobs/media-io/video-frame.c | 28 ++++++++++++++++++++++++++++
 libobs/media-io/video-frame.h |  4 ++++
 2 files changed, 32 insertions(+)

diff --git a/libobs/media-io/video-frame.c b/libobs/media-io/video-frame.c
index 3a828609f..81f95234a 100644
--- a/libobs/media-io/video-frame.c
+++ b/libobs/media-io/video-frame.c
@@ -86,3 +86,31 @@ void video_frame_init(struct video_frame *frame, enum video_format format,
 	}
 }
 
+void video_frame_copy(struct video_frame *dst, const struct video_frame *src,
+		enum video_format format, uint32_t cy)
+{
+	switch (format) {
+	case VIDEO_FORMAT_NONE:
+		return;
+
+	case VIDEO_FORMAT_I420:
+		memcpy(dst->data[0], src->data[0], src->linesize[0] * cy);
+		memcpy(dst->data[1], src->data[1], src->linesize[1] * cy / 2);
+		memcpy(dst->data[2], src->data[2], src->linesize[2] * cy / 2);
+		break;
+
+	case VIDEO_FORMAT_NV12:
+		memcpy(dst->data[0], src->data[0], src->linesize[0] * cy);
+		memcpy(dst->data[1], src->data[1], src->linesize[1] * cy / 2);
+		break;
+
+	case VIDEO_FORMAT_YVYU:
+	case VIDEO_FORMAT_YUY2:
+	case VIDEO_FORMAT_UYVY:
+	case VIDEO_FORMAT_RGBA:
+	case VIDEO_FORMAT_BGRA:
+	case VIDEO_FORMAT_BGRX:
+		memcpy(dst->data[0], src->data[0], src->linesize[0] * cy);
+		break;
+	}
+}
diff --git a/libobs/media-io/video-frame.h b/libobs/media-io/video-frame.h
index 64f6b5519..4620a2fdb 100644
--- a/libobs/media-io/video-frame.h
+++ b/libobs/media-io/video-frame.h
@@ -53,3 +53,7 @@ static inline void video_frame_destroy(struct video_frame *frame)
 		bfree(frame);
 	}
 }
+
+EXPORT void video_frame_copy(struct video_frame *dst,
+		const struct video_frame *src, enum video_format format,
+		uint32_t height);
-- 
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