IQ.Pilot Release Commit @ f2a861c

iqpilot/system/camerad/cameras/nv12_info.h

@@ -0,0 +1,22 @@
+#pragma once
+
+#include <cassert>
+#include <cstdint>
+#include <tuple>
+
+#include "third_party/linux/include/msm_media_info.h"
+
+// Returns NV12 aligned (stride, y_height, uv_height, buffer_size) for the given frame dimensions.
+inline std::tuple<uint32_t, uint32_t, uint32_t, uint32_t> get_nv12_info(int width, int height) {
+  const uint32_t stride = VENUS_Y_STRIDE(COLOR_FMT_NV12, width);
+  const uint32_t y_height = VENUS_Y_SCANLINES(COLOR_FMT_NV12, height);
+  const uint32_t uv_height = VENUS_UV_SCANLINES(COLOR_FMT_NV12, height);
+  const uint32_t size = VENUS_BUFFER_SIZE(COLOR_FMT_NV12, width, height);
+
+  // Sanity checks for NV12 format assumptions
+  assert(stride == VENUS_UV_STRIDE(COLOR_FMT_NV12, width));
+  assert(y_height / 2 == uv_height);
+  assert((stride * y_height) % 0x1000 == 0);  // uv_offset must be page-aligned
+
+  return {stride, y_height, uv_height, size};
+}