add MappedBuffer & co

1 files changed, 67 insertions, 0 deletions

diff --git a/libkmstest/mappedbuffer.cpp b/libkmstest/mappedbuffer.cpp
new file mode 100644
index 0000000..40d5f37
--- /dev/null
+++ b/libkmstest/mappedbuffer.cpp
@@ -0,0 +1,67 @@
+#include <map>
+
+#include "mappedbuffer.h"
+
+using namespace std;
+
+namespace kms {
+
+struct FormatPlaneInfo
+{
+	uint8_t bitspp;	/* bits per (macro) pixel */
+	uint8_t xsub;
+	uint8_t ysub;
+};
+
+struct FormatInfo
+{
+	uint8_t num_planes;
+	struct FormatPlaneInfo planes[4];
+};
+
+static const map<PixelFormat, FormatInfo> format_info_array = {
+	/* YUV packed */
+	{ PixelFormat::UYVY, { 1, { { 32, 2, 1 } }, } },
+	{ PixelFormat::YUYV, { 1, { { 32, 2, 1 } }, } },
+	{ PixelFormat::YVYU, { 1, { { 32, 2, 1 } }, } },
+	{ PixelFormat::VYUY, { 1, { { 32, 2, 1 } }, } },
+	/* YUV semi-planar */
+	{ PixelFormat::NV12, { 2, { { 8, 1, 1, }, { 16, 2, 2 } }, } },
+	{ PixelFormat::NV21, { 2, { { 8, 1, 1, }, { 16, 2, 2 } }, } },
+	/* RGB16 */
+	{ PixelFormat::RGB565, { 1, { { 16, 1, 1 } }, } },
+	/* RGB32 */
+	{ PixelFormat::XRGB8888, { 1, { { 32, 1, 1 } }, } },
+	{ PixelFormat::XBGR8888, { 1, { { 32, 1, 1 } }, } },
+	{ PixelFormat::ARGB8888, { 1, { { 32, 1, 1 } }, } },
+	{ PixelFormat::ABGR8888, { 1, { { 32, 1, 1 } }, } },
+};
+
+MappedCPUBuffer::MappedCPUBuffer(uint32_t width, uint32_t height, PixelFormat format)
+	: m_width(width), m_height(height), m_format(format)
+{
+	const FormatInfo& format_info = format_info_array.at(m_format);
+
+	m_num_planes = format_info.num_planes;
+
+	for (unsigned i = 0; i < format_info.num_planes; ++i) {
+		const FormatPlaneInfo& pi = format_info.planes[i];
+		FramebufferPlane& plane = m_planes[i];
+
+		plane.stride = width * pi.bitspp / 8 / pi.xsub;
+		plane.size = plane.stride * height/ pi.ysub;
+		plane.offset = 0;
+		plane.map = new uint8_t[plane.size];
+	}
+}
+
+MappedCPUBuffer::~MappedCPUBuffer()
+{
+	for (unsigned i = 0; i < m_num_planes; ++i) {
+		FramebufferPlane& plane = m_planes[i];
+
+		delete plane.map;
+	}
+}
+
+}