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+/*
+ * Copyright 2011 The LibYuv Project Authors. All rights reserved.
+ *
+ * Use of this source code is governed by a BSD-style license
+ * that can be found in the LICENSE file in the root of the source
+ * tree. An additional intellectual property rights grant can be found
+ * in the file PATENTS. All contributing project authors may
+ * be found in the AUTHORS file in the root of the source tree.
+ */
+
+
+#include "libyuv/video_common.h"
+
+#ifdef __cplusplus
+namespace libyuv {
+extern "C" {
+#endif
+
+#define ARRAY_SIZE(x) (int)(sizeof(x) / sizeof(x[0]))
+
+struct FourCCAliasEntry {
+ uint32 alias;
+ uint32 canonical;
+};
+
+static const struct FourCCAliasEntry kFourCCAliases[] = {
+ {FOURCC_IYUV, FOURCC_I420},
+ {FOURCC_YU12, FOURCC_I420},
+ {FOURCC_YU16, FOURCC_I422},
+ {FOURCC_YU24, FOURCC_I444},
+ {FOURCC_YUYV, FOURCC_YUY2},
+ {FOURCC_YUVS, FOURCC_YUY2}, // kCMPixelFormat_422YpCbCr8_yuvs
+ {FOURCC_HDYC, FOURCC_UYVY},
+ {FOURCC_2VUY, FOURCC_UYVY}, // kCMPixelFormat_422YpCbCr8
+ {FOURCC_JPEG, FOURCC_MJPG}, // Note: JPEG has DHT while MJPG does not.
+ {FOURCC_DMB1, FOURCC_MJPG},
+ {FOURCC_BA81, FOURCC_BGGR}, // deprecated.
+ {FOURCC_RGB3, FOURCC_RAW },
+ {FOURCC_BGR3, FOURCC_24BG},
+ {FOURCC_CM32, FOURCC_BGRA}, // kCMPixelFormat_32ARGB
+ {FOURCC_CM24, FOURCC_RAW }, // kCMPixelFormat_24RGB
+ {FOURCC_L555, FOURCC_RGBO}, // kCMPixelFormat_16LE555
+ {FOURCC_L565, FOURCC_RGBP}, // kCMPixelFormat_16LE565
+ {FOURCC_5551, FOURCC_RGBO}, // kCMPixelFormat_16LE5551
+};
+// TODO(fbarchard): Consider mapping kCMPixelFormat_32BGRA to FOURCC_ARGB.
+// {FOURCC_BGRA, FOURCC_ARGB}, // kCMPixelFormat_32BGRA
+
+LIBYUV_API
+uint32 CanonicalFourCC(uint32 fourcc) {
+ int i;
+ for (i = 0; i < ARRAY_SIZE(kFourCCAliases); ++i) {
+ if (kFourCCAliases[i].alias == fourcc) {
+ return kFourCCAliases[i].canonical;
+ }
+ }
+ // Not an alias, so return it as-is.
+ return fourcc;
+}
+
+#ifdef __cplusplus
+} // extern "C"
+} // namespace libyuv
+#endif
+