From 34380af0e1c837e116d12e57155a7057bf3b872b Mon Sep 17 00:00:00 2001
From: Kostya Shishkov <kostya.shishkov@gmail.com>
Date: Tue, 24 Oct 2006 04:57:43 +0000
Subject: [PATCH] 16-bit grayscale support

Originally committed as revision 6778 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/imgconvert.c | 107 ++++++++++++++++++++++++++++++++++++++++
 libavcodec/utils.c      |   2 +
 libavutil/avutil.h      |   8 ++-
 3 files changed, 115 insertions(+), 2 deletions(-)

diff --git a/libavcodec/imgconvert.c b/libavcodec/imgconvert.c
index 7293e58a16..575d47ec01 100644
--- a/libavcodec/imgconvert.c
+++ b/libavcodec/imgconvert.c
@@ -193,6 +193,20 @@ static const PixFmtInfo pix_fmt_info[PIX_FMT_NB] = {
     },
 
     /* gray / mono formats */
+    [PIX_FMT_GRAY16BE] = {
+        .name = "gray16be",
+        .nb_channels = 1,
+        .color_type = FF_COLOR_GRAY,
+        .pixel_type = FF_PIXEL_PLANAR,
+        .depth = 16,
+    },
+    [PIX_FMT_GRAY16LE] = {
+        .name = "gray16le",
+        .nb_channels = 1,
+        .color_type = FF_COLOR_GRAY,
+        .pixel_type = FF_PIXEL_PLANAR,
+        .depth = 16,
+    },
     [PIX_FMT_GRAY8] = {
         .name = "gray",
         .nb_channels = 1,
@@ -427,6 +441,8 @@ int avpicture_fill(AVPicture *picture, uint8_t *ptr,
         picture->data[2] = NULL;
         picture->linesize[0] = width * 4;
         return size * 4;
+    case PIX_FMT_GRAY16BE:
+    case PIX_FMT_GRAY16LE:
     case PIX_FMT_BGR555:
     case PIX_FMT_BGR565:
     case PIX_FMT_RGB555:
@@ -1842,6 +1858,75 @@ static void gray_to_monoblack(AVPicture *dst, const AVPicture *src,
     gray_to_mono(dst, src, width, height, 0x00);
 }
 
+static void gray_to_gray16(AVPicture *dst, const AVPicture *src,
+                              int width, int height)
+{
+    int x, y, src_wrap, dst_wrap;
+    uint8_t *s, *d;
+    s = src->data[0];
+    src_wrap = src->linesize[0] - width;
+    d = dst->data[0];
+    dst_wrap = dst->linesize[0] - width * 2;
+    for(y=0; y<height; y++){
+        for(x=0; x<width; x++){
+            *d++ = *s;
+            *d++ = *s++;
+        }
+        s += src_wrap;
+        d += dst_wrap;
+    }
+}
+
+static void gray16_to_gray(AVPicture *dst, const AVPicture *src,
+                              int width, int height)
+{
+    int x, y, src_wrap, dst_wrap;
+    uint8_t *s, *d;
+    s = src->data[0];
+    src_wrap = src->linesize[0] - width * 2;
+    d = dst->data[0];
+    dst_wrap = dst->linesize[0] - width;
+    for(y=0; y<height; y++){
+        for(x=0; x<width; x++){
+            *d++ = *s;
+            s += 2;
+        }
+        s += src_wrap;
+        d += dst_wrap;
+    }
+}
+
+static void gray16be_to_gray(AVPicture *dst, const AVPicture *src,
+                              int width, int height)
+{
+    gray16_to_gray(dst, src, width, height);
+}
+
+static void gray16le_to_gray(AVPicture *dst, const AVPicture *src,
+                              int width, int height)
+{
+    gray16_to_gray(dst, src + 1, width, height);
+}
+
+static void gray16_to_gray16(AVPicture *dst, const AVPicture *src,
+                              int width, int height)
+{
+    int x, y, src_wrap, dst_wrap;
+    uint16_t *s, *d;
+    s = src->data[0];
+    src_wrap = (src->linesize[0] - width * 2)/2;
+    d = dst->data[0];
+    dst_wrap = (dst->linesize[0] - width * 2)/2;
+    for(y=0; y<height; y++){
+        for(x=0; x<width; x++){
+            *d++ = bswap_16(*s++);
+        }
+        s += src_wrap;
+        d += dst_wrap;
+    }
+}
+
+
 typedef struct ConvertEntry {
     void (*convert)(AVPicture *dst,
                     const AVPicture *src, int width, int height);
@@ -2024,6 +2109,22 @@ static const ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
             .convert = rgb565_to_gray
         },
     },
+    [PIX_FMT_GRAY16BE] = {
+        [PIX_FMT_GRAY8] = {
+            .convert = gray16be_to_gray
+        },
+        [PIX_FMT_GRAY16LE] = {
+            .convert = gray16_to_gray16
+        },
+    },
+    [PIX_FMT_GRAY16LE] = {
+        [PIX_FMT_GRAY8] = {
+            .convert = gray16le_to_gray
+        },
+        [PIX_FMT_GRAY16BE] = {
+            .convert = gray16_to_gray16
+        },
+    },
     [PIX_FMT_GRAY8] = {
         [PIX_FMT_RGB555] = {
             .convert = gray_to_rgb555
@@ -2046,6 +2147,12 @@ static const ConvertEntry convert_table[PIX_FMT_NB][PIX_FMT_NB] = {
         [PIX_FMT_MONOBLACK] = {
             .convert = gray_to_monoblack
         },
+        [PIX_FMT_GRAY16LE] = {
+            .convert = gray_to_gray16
+        },
+        [PIX_FMT_GRAY16BE] = {
+            .convert = gray_to_gray16
+        },
     },
     [PIX_FMT_MONOWHITE] = {
         [PIX_FMT_GRAY8] = {
diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index ef0e167190..848d6047a2 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -177,6 +177,8 @@ void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height){
     case PIX_FMT_YUV422P:
     case PIX_FMT_YUV444P:
     case PIX_FMT_GRAY8:
+    case PIX_FMT_GRAY16BE:
+    case PIX_FMT_GRAY16LE:
     case PIX_FMT_YUVJ420P:
     case PIX_FMT_YUVJ422P:
     case PIX_FMT_YUVJ444P:
diff --git a/libavutil/avutil.h b/libavutil/avutil.h
index ff34d8c2bb..a83882de1d 100644
--- a/libavutil/avutil.h
+++ b/libavutil/avutil.h
@@ -34,8 +34,8 @@ extern "C" {
 #define AV_STRINGIFY(s)         AV_TOSTRING(s)
 #define AV_TOSTRING(s) #s
 
-#define LIBAVUTIL_VERSION_INT   ((49<<16)+(0<<8)+1)
-#define LIBAVUTIL_VERSION       49.0.1
+#define LIBAVUTIL_VERSION_INT   ((49<<16)+(0<<8)+2)
+#define LIBAVUTIL_VERSION       49.0.2
 #define LIBAVUTIL_BUILD         LIBAVUTIL_VERSION_INT
 
 #define LIBAVUTIL_IDENT         "Lavu" AV_STRINGIFY(LIBAVUTIL_VERSION)
@@ -105,6 +105,8 @@ enum PixelFormat {
     PIX_FMT_RGB32_1,   ///< Packed RGB 8:8:8, 32bpp, (msb)8R 8G 8B 8A(lsb), in cpu endianness
     PIX_FMT_BGR32_1,   ///< Packed RGB 8:8:8, 32bpp, (msb)8B 8G 8R 8A(lsb), in cpu endianness
 
+    PIX_FMT_GRAY16BE,  ///<        Y        , 16bpp, big-endian
+    PIX_FMT_GRAY16LE,  ///<        Y        , 16bpp, little-endian
     PIX_FMT_NB,        ///< number of pixel formats, DO NOT USE THIS if you want to link with shared libav* because the number of formats might differ between versions
 };
 
@@ -113,11 +115,13 @@ enum PixelFormat {
 #define PIX_FMT_BGRA PIX_FMT_BGR32_1
 #define PIX_FMT_ARGB PIX_FMT_RGB32
 #define PIX_FMT_ABGR PIX_FMT_BGR32
+#define PIX_FMT_GRAY16 PIX_FMT_GRAY16BE
 #else
 #define PIX_FMT_RGBA PIX_FMT_BGR32
 #define PIX_FMT_BGRA PIX_FMT_RGB32
 #define PIX_FMT_ARGB PIX_FMT_BGR32_1
 #define PIX_FMT_ABGR PIX_FMT_RGB32_1
+#define PIX_FMT_GRAY16 PIX_FMT_GRAY16LE
 #endif
 
 #if LIBAVUTIL_VERSION_INT < (50<<16)