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
14 namespace libyuv {
15 extern "C" {
16 #endif
17
18 #define ARRAY_SIZE(x) (int)(sizeof(x) / sizeof(x[0]))
19
20 struct FourCCAliasEntry {
21 uint32 alias;
22 uint32 canonical;
23 };
24
25 static 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
48 LIBYUV_API
CanonicalFourCC(uint32 fourcc)49 uint32 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