1/*
2 *  Copyright 2011 The LibYuv Project Authors. All rights reserved.
3 *
4 *  Use of this source code is governed by a BSD-style license
5 *  that can be found in the LICENSE file in the root of the source
6 *  tree. An additional intellectual property rights grant can be found
7 *  in the file PATENTS. All contributing project authors may
8 *  be found in the AUTHORS file in the root of the source tree.
9 */
10
11#include "libyuv/video_common.h"
12
13#ifdef __cplusplus
14namespace libyuv {
15extern "C" {
16#endif
17
18#define ARRAY_SIZE(x) (int)(sizeof(x) / sizeof(x[0]))
19
20struct FourCCAliasEntry {
21  uint32 alias;
22  uint32 canonical;
23};
24
25static const struct FourCCAliasEntry kFourCCAliases[] = {
26    {FOURCC_IYUV, FOURCC_I420},
27    {FOURCC_YU12, FOURCC_I420},
28    {FOURCC_YU16, FOURCC_I422},
29    {FOURCC_YU24, FOURCC_I444},
30    {FOURCC_YUYV, FOURCC_YUY2},
31    {FOURCC_YUVS, FOURCC_YUY2},  // kCMPixelFormat_422YpCbCr8_yuvs
32    {FOURCC_HDYC, FOURCC_UYVY},
33    {FOURCC_2VUY, FOURCC_UYVY},  // kCMPixelFormat_422YpCbCr8
34    {FOURCC_JPEG, FOURCC_MJPG},  // Note: JPEG has DHT while MJPG does not.
35    {FOURCC_DMB1, FOURCC_MJPG},
36    {FOURCC_BA81, FOURCC_BGGR},  // deprecated.
37    {FOURCC_RGB3, FOURCC_RAW},
38    {FOURCC_BGR3, FOURCC_24BG},
39    {FOURCC_CM32, FOURCC_BGRA},  // kCMPixelFormat_32ARGB
40    {FOURCC_CM24, FOURCC_RAW},   // kCMPixelFormat_24RGB
41    {FOURCC_L555, FOURCC_RGBO},  // kCMPixelFormat_16LE555
42    {FOURCC_L565, FOURCC_RGBP},  // kCMPixelFormat_16LE565
43    {FOURCC_5551, FOURCC_RGBO},  // kCMPixelFormat_16LE5551
44};
45// TODO(fbarchard): Consider mapping kCMPixelFormat_32BGRA to FOURCC_ARGB.
46//  {FOURCC_BGRA, FOURCC_ARGB},  // kCMPixelFormat_32BGRA
47
48LIBYUV_API
49uint32 CanonicalFourCC(uint32 fourcc) {
50  int i;
51  for (i = 0; i < ARRAY_SIZE(kFourCCAliases); ++i) {
52    if (kFourCCAliases[i].alias == fourcc) {
53      return kFourCCAliases[i].canonical;
54    }
55  }
56  // Not an alias, so return it as-is.
57  return fourcc;
58}
59
60#ifdef __cplusplus
61}  // extern "C"
62}  // namespace libyuv
63#endif
64