H010ToAR30 and H010ToARGB optimized YUV buffering

Reduce allocations of row buffers to 1 alloc/free.
Do 2 rows at a time to avoid converting U and V planes twice.

Bug: libyuv:715
Test: LibYUVConvertTest.H010ToAR30_Opt
Change-Id: I2f3a03b4875df5e3b969112a78a1a0b28399fa2f
Reviewed-on: https://chromium-review.googlesource.com/816021
Reviewed-by: Cheng Wang <wangcheng@google.com>

1 files changed, 9 insertions, 17 deletions

diff --git a/docs/formats.md b/docs/formats.md
index 550e14bc..3973e5d5 100644
--- a/docs/formats.md
+++ b/docs/formats.md
@@ -35,9 +35,8 @@ This is how OSX formats map to libyuv
 # FOURCC (Four Charactacter Code) List
 
 The following is extracted from video_common.h as a complete list of formats supported by libyuv.
-
     enum FourCC {
-      // 8 Primary YUV formats: 5 planar, 2 biplanar, 2 packed.
+      // 9 Primary YUV formats: 5 planar, 2 biplanar, 2 packed.
       FOURCC_I420 = FOURCC('I', '4', '2', '0'),
       FOURCC_I422 = FOURCC('I', '4', '2', '2'),
       FOURCC_I444 = FOURCC('I', '4', '4', '4'),
@@ -46,38 +45,34 @@ The following is extracted from video_common.h as a complete list of formats sup
       FOURCC_NV12 = FOURCC('N', 'V', '1', '2'),
       FOURCC_YUY2 = FOURCC('Y', 'U', 'Y', '2'),
       FOURCC_UYVY = FOURCC('U', 'Y', 'V', 'Y'),
+      FOURCC_H010 = FOURCC('H', '0', '1', '0'),  // unofficial fourcc. 10 bit lsb
 
-      // 1 Secondary YUV formats: row biplanar.
+      // 1 Secondary YUV format: row biplanar.
       FOURCC_M420 = FOURCC('M', '4', '2', '0'),
 
-      // 9 Primary RGB formats: 4 32 bpp, 2 24 bpp, 3 16 bpp.
+      // 10 Primary RGB formats: 4 32 bpp, 2 24 bpp, 3 16 bpp, 1 10 bpc
       FOURCC_ARGB = FOURCC('A', 'R', 'G', 'B'),
       FOURCC_BGRA = FOURCC('B', 'G', 'R', 'A'),
       FOURCC_ABGR = FOURCC('A', 'B', 'G', 'R'),
-      FOURCC_AR30 = FOURCC('A', 'R', '3', '0'),
+      FOURCC_AR30 = FOURCC('A', 'R', '3', '0'),  // 10 bit per channel. 2101010.
       FOURCC_24BG = FOURCC('2', '4', 'B', 'G'),
-      FOURCC_RAW  = FOURCC('r', 'a', 'w', ' '),
+      FOURCC_RAW = FOURCC('r', 'a', 'w', ' '),
       FOURCC_RGBA = FOURCC('R', 'G', 'B', 'A'),
       FOURCC_RGBP = FOURCC('R', 'G', 'B', 'P'),  // rgb565 LE.
       FOURCC_RGBO = FOURCC('R', 'G', 'B', 'O'),  // argb1555 LE.
       FOURCC_R444 = FOURCC('R', '4', '4', '4'),  // argb4444 LE.
 
-      // 4 Secondary RGB formats: 4 Bayer Patterns.
-      FOURCC_RGGB = FOURCC('R', 'G', 'G', 'B'),
-      FOURCC_BGGR = FOURCC('B', 'G', 'G', 'R'),
-      FOURCC_GRBG = FOURCC('G', 'R', 'B', 'G'),
-      FOURCC_GBRG = FOURCC('G', 'B', 'R', 'G'),
-
       // 1 Primary Compressed YUV format.
       FOURCC_MJPG = FOURCC('M', 'J', 'P', 'G'),
 
-      // 5 Auxiliary YUV variations: 3 with U and V planes are swapped, 1 Alias.
+      // 7 Auxiliary YUV variations: 3 with U and V planes are swapped, 1 Alias.
       FOURCC_YV12 = FOURCC('Y', 'V', '1', '2'),
       FOURCC_YV16 = FOURCC('Y', 'V', '1', '6'),
       FOURCC_YV24 = FOURCC('Y', 'V', '2', '4'),
       FOURCC_YU12 = FOURCC('Y', 'U', '1', '2'),  // Linux version of I420.
       FOURCC_J420 = FOURCC('J', '4', '2', '0'),
-      FOURCC_J400 = FOURCC('J', '4', '0', '0'),
+      FOURCC_J400 = FOURCC('J', '4', '0', '0'),  // unofficial fourcc
+      FOURCC_H420 = FOURCC('H', '4', '2', '0'),  // unofficial fourcc
 
       // 14 Auxiliary aliases.  CanonicalFourCC() maps these to canonical fourcc.
       FOURCC_IYUV = FOURCC('I', 'Y', 'U', 'V'),  // Alias for I420.
@@ -98,9 +93,6 @@ The following is extracted from video_common.h as a complete list of formats sup
       FOURCC_L565 = FOURCC('L', '5', '6', '5'),  // Alias for RGBP.
       FOURCC_5551 = FOURCC('5', '5', '5', '1'),  // Alias for RGBO.
 
-      // 1 Auxiliary compressed YUV format set aside for capturer.
-      FOURCC_H264 = FOURCC('H', '2', '6', '4'),
-
 # Planar YUV
       The following formats contains a full size Y plane followed by 1 or 2
         planes for UV: I420, I422, I444, I400, NV21, NV12, I400