The Tor Browser: media/libyuv/source/video

Incorporate requested changes from Mozilla in review:
https://bugzilla.mozilla.org/show_bug.cgi?id=1123480#c6

     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  */

    12 #include "libyuv/video_common.h"

    14 #ifdef __cplusplus

    15 namespace libyuv {

    16 extern "C" {

    17 #endif

    19 #define ARRAY_SIZE(x) (int)(sizeof(x) / sizeof(x[0]))

    21 struct FourCCAliasEntry {

    22   uint32 alias;

    23   uint32 canonical;

    24 };

    26 static const struct FourCCAliasEntry kFourCCAliases[] = {

    27   {FOURCC_IYUV, 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},

    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

    48 LIBYUV_API

    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 }

    60 #ifdef __cplusplus

    61 }  // extern "C"

    62 }  // namespace libyuv

    63 #endif

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