[FFmpeg-devel] [PATCH]lavc/rscc: Support pal8

[Carl Eugen Hoyos]

Hi!

Attached patch fixes the colours for the sample in ticket #5611.

Please comment, Carl Eugen
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From 7af0c224f5c0fd8dec095ba5333a87257ffccd85 Mon Sep 17 00:00:00 2001
From: Carl Eugen Hoyos <cehoyos at ag.or.at>
Date: Mon, 19 Sep 2016 19:12:12 +0200
Subject: [PATCH] lavc/rscc: Support pal8 in rscc.

Fixes the colours for the sample in ticket #5611.
---
 libavcodec/rscc.c |   16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/libavcodec/rscc.c b/libavcodec/rscc.c
index 3b3703c..6d4b5af 100644
--- a/libavcodec/rscc.c
+++ b/libavcodec/rscc.c
@@ -31,7 +31,7 @@
  * and it can be deflated or not. Similarly, pixel data comes after the header
  * and a variable size value, and it can be deflated or just raw.
  *
- * Supports: GRAY8, BGRA, BGR24, RGB555, RGB8
+ * Supports: PAL8, BGRA, BGR24, RGB555, RGB8
  */
 
 #include <stdint.h>
@@ -58,6 +58,8 @@ typedef struct RsccContext {
     Tile *tiles;
     unsigned int tiles_size;
     int component_size;
+    uint32_t pal[AVPALETTE_COUNT];
+    int pal_size;
 
     /* zlib interaction */
     uint8_t *inflated_buf;
@@ -86,10 +88,18 @@ static av_cold int rscc_init(AVCodecContext *avctx)
         avctx->pix_fmt = AV_PIX_FMT_BGRA;
         ctx->component_size = 4;
     } else if (avctx->codec_tag == MKTAG('R', 'S', 'C', 'C')) {
+        int i;
+        uint8_t *pal;
         ctx->component_size = avctx->bits_per_coded_sample / 8;
         switch (avctx->bits_per_coded_sample) {
         case 8:
-            avctx->pix_fmt = AV_PIX_FMT_GRAY8;
+            avctx->pix_fmt = AV_PIX_FMT_PAL8;
+            pal = avctx->extradata;
+            ctx->pal_size = FFMIN(avctx->extradata_size, AVPALETTE_SIZE);
+            for (i = 0; i < ctx->pal_size / 4; i++) {
+                ctx->pal[i] = 0xFFU << 24 | AV_RL32(pal);
+                pal += 4;
+            }
             break;
         case 16:
             avctx->pix_fmt = AV_PIX_FMT_RGB555LE;
@@ -308,6 +318,8 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
     } else {
         frame->pict_type = AV_PICTURE_TYPE_P;
     }
+    if (avctx->pix_fmt == AV_PIX_FMT_PAL8)
+        memcpy(frame->data[1], ctx->pal, ctx->pal_size);
     *got_frame = 1;
 
 end:
-- 
1.7.10.4