ffmpeg: add upstream patch

Signed-off-by: Stephan Raue <stephan@openelec.tv>

packages/multimedia/ffmpeg/patches/ffmpeg-99.0011-mpeg4video-Signal-unsupported-GMC-with-more-than-one.patch

@@ -0,0 +1,48 @@
+From 84e9a1784bbd3182b68cefa5e5feae8da8b9e184 Mon Sep 17 00:00:00 2001
+From: popcornmix <popcornmix@gmail.com>
+Date: Fri, 5 Jun 2015 22:48:33 +0100
+Subject: [PATCH] mpeg4video: Signal unsupported GMC with more than one warp
+ point
+
+---
+ libavcodec/avcodec.h       | 1 +
+ libavcodec/mpeg4videodec.c | 4 ++++
+ 2 files changed, 5 insertions(+)
+
+diff --git a/libavcodec/avcodec.h b/libavcodec/avcodec.h
+index 8c7c420..e63dc2d 100644
+--- a/libavcodec/avcodec.h
++++ b/libavcodec/avcodec.h
+@@ -2527,6 +2527,7 @@ typedef struct AVCodecContext {
+ #define FF_BUG_DC_CLIP          4096
+ #define FF_BUG_MS               8192 ///< Work around various bugs in Microsoft's broken decoders.
+ #define FF_BUG_TRUNCATED       16384
++#define FF_BUG_GMC_UNSUPPORTED 32768
+ 
+     /**
+      * strictly follow the standard (MPEG4, ...).
+diff --git a/libavcodec/mpeg4videodec.c b/libavcodec/mpeg4videodec.c
+index 9bf33dd..0b5d3b9 100644
+--- a/libavcodec/mpeg4videodec.c
++++ b/libavcodec/mpeg4videodec.c
+@@ -2179,6 +2179,9 @@ int ff_mpeg4_workaround_bugs(AVCodecContext *avctx)
+ 
+         if (ctx->divx_version >= 0)
+             s->workaround_bugs |= FF_BUG_HPEL_CHROMA;
++
++        if (ctx->num_sprite_warping_points > 1)
++            s->workaround_bugs |= FF_BUG_GMC_UNSUPPORTED;
+     }
+ 
+     if (s->workaround_bugs & FF_BUG_STD_QPEL) {
+@@ -2203,6 +2206,7 @@ int ff_mpeg4_workaround_bugs(AVCodecContext *avctx)
+                s->workaround_bugs, ctx->lavc_build, ctx->xvid_build,
+                ctx->divx_version, ctx->divx_build, s->divx_packed ? "p" : "");
+ 
++    avctx->workaround_bugs = s->workaround_bugs;
+     if (CONFIG_MPEG4_DECODER && ctx->xvid_build >= 0 &&
+         s->codec_id == AV_CODEC_ID_MPEG4 &&
+         avctx->idct_algo == FF_IDCT_AUTO) {
+-- 
+1.9.1
+