From 3dd2f87e61d3c02493a02efca146569dc771cb86 Mon Sep 17 00:00:00 2001
From: Jai Menon <realityman@gmx.net>
Date: Thu, 2 Apr 2009 12:15:04 +0000
Subject: [PATCH] Map MOV fourcc YUV2 correctly to PIX_FMT_YUYV422.

Patch by Jai Menon

Originally committed as revision 18316 to svn://svn.ffmpeg.org/ffmpeg/trunk
---
 libavcodec/raw.c    |  1 +
 libavcodec/rawdec.c | 12 ++++++++++++
 libavcodec/rawenc.c | 11 ++++++++++-
 libavformat/isom.c  |  2 +-
 4 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/libavcodec/raw.c b/libavcodec/raw.c
index 28d6b0129b..c79c0125f7 100644
--- a/libavcodec/raw.c
+++ b/libavcodec/raw.c
@@ -51,6 +51,7 @@ const PixelFormatTag ff_raw_pixelFormatTags[] = {
     /* quicktime */
     { PIX_FMT_UYVY422, MKTAG('2', 'v', 'u', 'y') },
     { PIX_FMT_UYVY422, MKTAG('A', 'V', 'U', 'I') }, /* FIXME merge both fields */
+    { PIX_FMT_YUYV422, MKTAG('y', 'u', 'v', '2') },
     { PIX_FMT_PAL8,    MKTAG('W', 'R', 'A', 'W') },
 
     { PIX_FMT_NONE, 0 },
diff --git a/libavcodec/rawdec.c b/libavcodec/rawdec.c
index db44f0c8b4..963e148aa1 100644
--- a/libavcodec/rawdec.c
+++ b/libavcodec/rawdec.c
@@ -26,6 +26,7 @@
 
 #include "avcodec.h"
 #include "raw.h"
+#include "libavutil/intreadwrite.h"
 
 typedef struct RawVideoContext {
     unsigned char * buffer;  /* block of memory for holding one frame */
@@ -144,6 +145,17 @@ static int raw_decode(AVCodecContext *avctx,
         picture->data[2] = tmp;
     }
 
+    if(avctx->codec_tag == AV_RL32("yuv2") &&
+       avctx->pix_fmt   == PIX_FMT_YUYV422) {
+        int x, y;
+        uint8_t *line = picture->data[0];
+        for(y = 0; y < avctx->height; y++) {
+            for(x = 0; x < avctx->width; x++)
+                line[2*x + 1] ^= 0x80;
+            line += picture->linesize[0];
+        }
+    }
+
     *data_size = sizeof(AVPicture);
     return buf_size;
 }
diff --git a/libavcodec/rawenc.c b/libavcodec/rawenc.c
index 4e560333e1..82a543ad46 100644
--- a/libavcodec/rawenc.c
+++ b/libavcodec/rawenc.c
@@ -26,6 +26,7 @@
 
 #include "avcodec.h"
 #include "raw.h"
+#include "libavutil/intreadwrite.h"
 
 static av_cold int raw_init_encoder(AVCodecContext *avctx)
 {
@@ -40,8 +41,16 @@ static av_cold int raw_init_encoder(AVCodecContext *avctx)
 static int raw_encode(AVCodecContext *avctx,
                             unsigned char *frame, int buf_size, void *data)
 {
-    return avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
+    int ret = avpicture_layout((AVPicture *)data, avctx->pix_fmt, avctx->width,
                                                avctx->height, frame, buf_size);
+
+    if(avctx->codec_tag == AV_RL32("yuv2") && ret > 0 &&
+       avctx->pix_fmt   == PIX_FMT_YUYV422) {
+        int x;
+        for(x = 1; x < avctx->height*avctx->width*2; x += 2)
+            frame[x] ^= 0x80;
+    }
+    return ret;
 }
 
 AVCodec rawvideo_encoder = {
diff --git a/libavformat/isom.c b/libavformat/isom.c
index b78d65e8fb..a4b89bdf07 100644
--- a/libavformat/isom.c
+++ b/libavformat/isom.c
@@ -61,7 +61,7 @@ const AVCodecTag codec_movvideo_tags[] = {
 /*  { CODEC_ID_, MKTAG('I', 'V', '5', '0') }, *//* Indeo 5.0 */
 
     { CODEC_ID_RAWVIDEO, MKTAG('r', 'a', 'w', ' ') }, /* Uncompressed RGB */
-/*  { CODEC_ID_RAWVIDEO, MKTAG('Y', 'u', 'v', '2') }, *//* Uncompressed YUV422 */
+    { CODEC_ID_RAWVIDEO, MKTAG('y', 'u', 'v', '2') }, /* Uncompressed YUV422 */
     { CODEC_ID_RAWVIDEO, MKTAG('A', 'V', 'U', 'I') }, /* YUV with alpha-channel (AVID Uncompressed) */
     { CODEC_ID_RAWVIDEO, MKTAG('2', 'v', 'u', 'y') }, /* UNCOMPRESSED 8BIT 4:2:2 */