From 92b099daf4b8ef93513e38b43899cb8458a2fde3 Mon Sep 17 00:00:00 2001
From: Vittorio Giovara <vittorio.giovara@gmail.com>
Date: Mon, 7 Apr 2014 17:19:53 +0200
Subject: [PATCH] swscale: support converting YVYU422 pixel format

---
 libswscale/input.c  | 15 +++++++++++++++
 libswscale/output.c | 13 ++++++++++++-
 libswscale/utils.c  |  1 +
 3 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/libswscale/input.c b/libswscale/input.c
index 2e8d43f446..c1cfd7cf7d 100644
--- a/libswscale/input.c
+++ b/libswscale/input.c
@@ -385,6 +385,17 @@ static void yuy2ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
     assert(src1 == src2);
 }
 
+static void yvy2ToUV_c(uint8_t *dstU, uint8_t *dstV, const uint8_t *src1,
+                       const uint8_t *src2, int width, uint32_t *unused)
+{
+    int i;
+    for (i = 0; i < width; i++) {
+        dstV[i] = src1[4 * i + 1];
+        dstU[i] = src1[4 * i + 3];
+    }
+    assert(src1 == src2);
+}
+
 static void bswap16Y_c(uint8_t *_dst, const uint8_t *_src, int width,
                        uint32_t *unused)
 {
@@ -677,6 +688,9 @@ av_cold void ff_sws_init_input_funcs(SwsContext *c)
     case AV_PIX_FMT_YUYV422:
         c->chrToYV12 = yuy2ToUV_c;
         break;
+    case AV_PIX_FMT_YVYU422:
+        c->chrToYV12 = yvy2ToUV_c;
+        break;
     case AV_PIX_FMT_UYVY422:
         c->chrToYV12 = uyvyToUV_c;
         break;
@@ -974,6 +988,7 @@ av_cold void ff_sws_init_input_funcs(SwsContext *c)
         break;
 #endif
     case AV_PIX_FMT_YUYV422:
+    case AV_PIX_FMT_YVYU422:
     case AV_PIX_FMT_Y400A:
         c->lumToYV12 = yuy2ToY_c;
         break;
diff --git a/libswscale/output.c b/libswscale/output.c
index e1d01b0f40..125d998836 100644
--- a/libswscale/output.c
+++ b/libswscale/output.c
@@ -450,7 +450,12 @@ YUV2PACKEDWRAPPER(yuv2mono,, black, AV_PIX_FMT_MONOBLACK)
         dest[pos + 1] = U;  \
         dest[pos + 2] = Y2; \
         dest[pos + 3] = V;  \
-    } else { \
+    } else if (target == AV_PIX_FMT_YVYU422) { \
+        dest[pos + 0] = Y1; \
+        dest[pos + 1] = V;  \
+        dest[pos + 2] = Y2; \
+        dest[pos + 3] = U;  \
+    } else { /* AV_PIX_FMT_UYVY422 */ \
         dest[pos + 0] = U;  \
         dest[pos + 1] = Y1; \
         dest[pos + 2] = V;  \
@@ -569,6 +574,7 @@ yuv2422_1_c_template(SwsContext *c, const int16_t *buf0,
 #undef output_pixels
 
 YUV2PACKEDWRAPPER(yuv2, 422, yuyv422, AV_PIX_FMT_YUYV422)
+YUV2PACKEDWRAPPER(yuv2, 422, yvyu422, AV_PIX_FMT_YVYU422)
 YUV2PACKEDWRAPPER(yuv2, 422, uyvy422, AV_PIX_FMT_UYVY422)
 
 #define R_B ((target == AV_PIX_FMT_RGB48LE || target == AV_PIX_FMT_RGB48BE) ? R : B)
@@ -1576,6 +1582,11 @@ av_cold void ff_sws_init_output_funcs(SwsContext *c,
         *yuv2packed2 = yuv2yuyv422_2_c;
         *yuv2packedX = yuv2yuyv422_X_c;
         break;
+    case AV_PIX_FMT_YVYU422:
+        *yuv2packed1 = yuv2yvyu422_1_c;
+        *yuv2packed2 = yuv2yvyu422_2_c;
+        *yuv2packedX = yuv2yvyu422_X_c;
+        break;
     case AV_PIX_FMT_UYVY422:
         *yuv2packed1 = yuv2uyvy422_1_c;
         *yuv2packed2 = yuv2uyvy422_2_c;
diff --git a/libswscale/utils.c b/libswscale/utils.c
index e438c88d0d..6af41f8b30 100644
--- a/libswscale/utils.c
+++ b/libswscale/utils.c
@@ -92,6 +92,7 @@ static const FormatEntry format_entries[AV_PIX_FMT_NB] = {
     [AV_PIX_FMT_YUVJ420P]    = { 1, 1 },
     [AV_PIX_FMT_YUVJ422P]    = { 1, 1 },
     [AV_PIX_FMT_YUVJ444P]    = { 1, 1 },
+    [AV_PIX_FMT_YVYU422]     = { 1, 1 },
     [AV_PIX_FMT_UYVY422]     = { 1, 1 },
     [AV_PIX_FMT_UYYVYY411]   = { 0, 0 },
     [AV_PIX_FMT_BGR8]        = { 1, 1 },