[vlc-devel] [PATCH] dxva2: support IMC3

[Rafaël Carré]

It's the only output format on my GMA 3150
It is identical to YV12 except:
 - U & V are swapped
 - U & V pitch is identical to Y pitch (first half is plane data,
 second plane is padding)
---
 modules/codec/avcodec/dxva2.c |   20 ++++++++++++++++++++
 1 files changed, 20 insertions(+), 0 deletions(-)

diff --git a/modules/codec/avcodec/dxva2.c b/modules/codec/avcodec/dxva2.c
index b60ffea..240d772 100644
--- a/modules/codec/avcodec/dxva2.c
+++ b/modules/codec/avcodec/dxva2.c
@@ -280,6 +280,7 @@ typedef struct {
 static const d3d_format_t d3d_formats[] = {
     { "YV12",   MAKEFOURCC('Y','V','1','2'),    VLC_CODEC_YV12 },
     { "NV12",   MAKEFOURCC('N','V','1','2'),    VLC_CODEC_NV12 },
+    { "IMC3",   MAKEFOURCC('I','M','C','3'),    VLC_CODEC_YV12 },
 
     { NULL, 0, 0 }
 };
@@ -467,6 +468,24 @@ static int Extract(vlc_va_t *external, picture_t *picture, AVFrame *ff)
         CopyFromYv12(picture, plane, pitch,
                      va->width, va->height,
                      &va->surface_cache);
+    } else if (va->render == MAKEFOURCC('I','M','C','3')) {
+        uint8_t *plane[3] = {
+            lock.pBits,
+            (uint8_t*)lock.pBits + lock.Pitch * va->surface_height,
+            (uint8_t*)lock.pBits + lock.Pitch * va->surface_height
+                                 + lock.Pitch * (va->surface_height/2)
+        };
+        size_t  pitch[3] = {
+            lock.Pitch,
+            lock.Pitch,
+            lock.Pitch,
+        };
+        CopyFromYv12(picture, plane, pitch,
+                     va->width, va->height,
+                     &va->surface_cache);
+        uint8_t *v = picture->p[1].p_pixels;
+        picture->p[1].p_pixels = picture->p[2].p_pixels;
+        picture->p[2].p_pixels = v;
     } else {
         assert(va->render == MAKEFOURCC('N','V','1','2'));
         uint8_t *plane[2] = {
@@ -1062,6 +1081,7 @@ static void DxCreateVideoConversion(vlc_va_dxva2_t *va)
 {
     switch (va->render) {
     case MAKEFOURCC('N','V','1','2'):
+    case MAKEFOURCC('I','M','C','3'):
         va->output = MAKEFOURCC('Y','V','1','2');
         break;
     default:
-- 
1.7.8.3