video_common.cc revision 7cd8149e2cbad8b1ff6d481c37a4775d3c8cf2fa 
1/*
2 *  Copyright (c) 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
12#include "video_common.h"
13
14#include <sstream>
15
16namespace libyuv {
17
18#define ARRAY_SIZE(x) (static_cast<int>((sizeof(x)/sizeof(x[0]))))
19
20struct FourCCAliasEntry {
21  uint32 alias;
22  uint32 canonical;
23};
24
25static const FourCCAliasEntry kFourCCAliases[] = {
26  {FOURCC_IYUV, FOURCC_I420},
27  {FOURCC_YU12, FOURCC_I420},
28  {FOURCC_YUYV, FOURCC_YUY2},
29  {FOURCC_YUVS, FOURCC_YUY2},
30  {FOURCC_HDYC, FOURCC_UYVY},
31  {FOURCC_2VUY, FOURCC_UYVY},
32  {FOURCC_BA81, FOURCC_BGGR},
33  {FOURCC_JPEG, FOURCC_MJPG},  // Note: JPEG has DHT while MJPG does not.
34  {FOURCC_RGB3, FOURCC_RAW},
35  {FOURCC_BGR3, FOURCC_24BG},
36};
37
38uint32 CanonicalFourCC(uint32 fourcc) {
39  for (int i = 0; i < ARRAY_SIZE(kFourCCAliases); ++i) {
40    if (kFourCCAliases[i].alias == fourcc) {
41      return kFourCCAliases[i].canonical;
42    }
43  }
44  // Not an alias, so return it as-is.
45  return fourcc;
46}
47
48}  // namespace libyuv
49