From a20aa15969794e2a61e1273af9ffa8efea140c03 Mon Sep 17 00:00:00 2001
From: wm4 <wm4@nowhere>
Date: Thu, 10 Apr 2014 00:07:25 +0200
Subject: [PATCH] sws_utils: remove custom GBRP conversion

We needed this because the OSD rendering path used GBRP for RGB
rendering, and not all swscale versions supported this conversion. But
recently we've dropped support for very old ffmpeg/libav versions, so
this isn't needed anymore.
---
 video/sws_utils.c | 48 -----------------------------------------------
 1 file changed, 48 deletions(-)

diff --git a/video/sws_utils.c b/video/sws_utils.c
index 4a6814b986..d8fd492473 100644
--- a/video/sws_utils.c
+++ b/video/sws_utils.c
@@ -97,49 +97,6 @@ static int mp_csp_to_sws_colorspace(enum mp_csp csp)
     }
 }
 
-// component_offset[]: byte index of each r (0), g (1), b (2), a (3) component
-static void planarize32(struct mp_image *dst, struct mp_image *src,
-                        int component_offset[4])
-{
-    for (int y = 0; y < dst->h; y++) {
-        for (int p = 0; p < 3; p++) {
-            uint8_t *d_line = dst->planes[p] + y * dst->stride[p];
-            uint8_t *s_line = src->planes[0] + y * src->stride[0];
-            s_line += component_offset[(p + 1) % 3]; // GBR => RGB
-            for (int x = 0; x < dst->w; x++) {
-                d_line[x] = s_line[x * 4];
-            }
-        }
-    }
-}
-
-#define SET_COMPS(comp, r, g, b, a) \
-    { (comp)[0] = (r); (comp)[1] = (g); (comp)[2] = (b); (comp)[3] = (a); }
-
-static int to_gbrp(struct mp_image *dst, struct mp_image *src,
-                   int my_sws_flags)
-{
-    struct mp_image *temp = NULL;
-    int comp[4];
-
-    switch (src->imgfmt) {
-    case IMGFMT_ABGR: SET_COMPS(comp, 3, 2, 1, 0); break;
-    case IMGFMT_BGRA: SET_COMPS(comp, 2, 1, 0, 3); break;
-    case IMGFMT_ARGB: SET_COMPS(comp, 1, 2, 3, 0); break;
-    case IMGFMT_RGBA: SET_COMPS(comp, 0, 1, 2, 3); break;
-    default:
-        temp = mp_image_alloc(IMGFMT_RGBA, dst->w, dst->h);
-        mp_image_swscale(temp, src, my_sws_flags);
-        src = temp;
-        SET_COMPS(comp, 0, 1, 2, 3);
-    }
-
-    planarize32(dst, src, comp);
-
-    talloc_free(temp);
-    return 0;
-}
-
 static bool cache_valid(struct mp_sws_context *ctx)
 {
     struct mp_sws_context *old = ctx->cached;
@@ -280,11 +237,6 @@ int mp_sws_reinit(struct mp_sws_context *ctx)
 int mp_sws_scale(struct mp_sws_context *ctx, struct mp_image *dst,
                  struct mp_image *src)
 {
-    // Hack for older swscale versions which don't support this.
-    // We absolutely need this in the OSD rendering path.
-    if (dst->imgfmt == IMGFMT_GBRP && !sws_isSupportedOutput(AV_PIX_FMT_GBRP))
-        return to_gbrp(dst, src, ctx->flags);
-
     mp_image_params_from_image(&ctx->src, src);
     mp_image_params_from_image(&ctx->dst, dst);