[vlc-devel] [PATCH] vmem: allow clients get and update additional format info

[Sergey Radionov]

---
 modules/video_output/vmem.c | 37 +++++++++++++++++++++++++++++++------
 1 file changed, 31 insertions(+), 6 deletions(-)

diff --git a/modules/video_output/vmem.c b/modules/video_output/vmem.c
index 5a6d869..ed640b8 100644
--- a/modules/video_output/vmem.c
+++ b/modules/video_output/vmem.c
@@ -3,6 +3,7 @@
  *****************************************************************************
  * Copyright (C) 2008 VLC authors and VideoLAN
  * Copyrgiht (C) 2010 Rémi Denis-Courmont
+ * Copyrgiht (C) 2016 Sergey Radionov <rsatom at gmail.com>
  *
  * Authors: Sam Hocevar <sam at zoy.org>
  *
@@ -168,6 +169,20 @@ static int Open(vlc_object_t *object)
     video_format_t fmt;
     video_format_ApplyRotation(&fmt, &vd->fmt);
 
+    enum {fmt_len, fmt_offset, fmt_visible_len, fmt_sar, fmt_update};
+    unsigned fmt_x[] = {
+        fmt.i_width,
+        fmt.i_x_offset,
+        fmt.i_visible_width,
+        vd->source.i_sar_num,
+        FALSE
+    };
+    unsigned fmt_y[] = {
+        fmt.i_height,
+        fmt.i_y_offset,
+        fmt.i_visible_height,
+        vd->source.i_sar_den,
+        FALSE };
     if (setup != NULL) {
         char chroma[5];
 
@@ -176,7 +191,7 @@ static int Open(vlc_object_t *object)
         memset(sys->pitches, 0, sizeof(sys->pitches));
         memset(sys->lines, 0, sizeof(sys->lines));
 
-        sys->count = setup(&sys->opaque, chroma, &fmt.i_width, &fmt.i_height,
+        sys->count = setup(&sys->opaque, chroma, fmt_x, fmt_y,
                            sys->pitches, sys->lines);
         if (sys->count == 0) {
             msg_Err(vd, "video format setup failure (no pictures)");
@@ -190,8 +205,8 @@ static int Open(vlc_object_t *object)
         fmt.i_chroma = vlc_fourcc_GetCodecFromString(VIDEO_ES, chroma);
         free(chroma);
 
-        fmt.i_width  = var_InheritInteger(vd, "vmem-width");
-        fmt.i_height = var_InheritInteger(vd, "vmem-height");
+        fmt_x[fmt_len]  = var_InheritInteger(vd, "vmem-width");
+        fmt_y[fmt_len] = var_InheritInteger(vd, "vmem-height");
         sys->pitches[0] = var_InheritInteger(vd, "vmem-pitch");
         sys->lines[0] = fmt.i_height;
         for (size_t i = 1; i < PICTURE_PLANE_MAX; i++)
@@ -202,9 +217,19 @@ static int Open(vlc_object_t *object)
         sys->count = 1;
         sys->cleanup = NULL;
     }
-    fmt.i_x_offset = fmt.i_y_offset = 0;
-    fmt.i_visible_width = fmt.i_width;
-    fmt.i_visible_height = fmt.i_height;
+
+    fmt.i_width = fmt_x[fmt_len];
+    fmt.i_height = fmt_y[fmt_len];
+    if (fmt_x[fmt_update] || fmt_y[fmt_update]) {
+        fmt.i_x_offset = fmt_x[fmt_offset];
+        fmt.i_y_offset = fmt_y[fmt_offset];
+        fmt.i_visible_width = fmt_x[fmt_visible_len];
+        fmt.i_visible_height = fmt_y[fmt_visible_len];
+    } else {
+        fmt.i_x_offset = fmt.i_y_offset = 0;
+        fmt.i_visible_width = fmt.i_width;
+        fmt.i_visible_height = fmt.i_height;
+    }
 
     if (!fmt.i_chroma) {
         msg_Err(vd, "vmem-chroma should be 4 characters long");
-- 
2.6.3.windows.1