avcodec: Constify AVCodecs

[ffmpeg] / libavcodec / rscc.c

diff --git a/libavcodec/rscc.c b/libavcodec/rscc.c
index 7d4e842cd3f81b52c788f81258616a8e2abd1781..0ec54ac1b05815408cdcf75d4b3ce314ca81fa55 100644 (file)
--- a/libavcodec/rscc.c
+++ b/libavcodec/rscc.c
@@ -43,6 +43,7 @@
 
 #include "avcodec.h"
 #include "bytestream.h"
+#include "decode.h"
 #include "internal.h"
 
 #define TILE_SIZE 8
@@ -199,6 +200,12 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
         /* If necessary, uncompress tiles, and hijack the bytestream reader */
         if (packed_tiles_size != tiles_nb * TILE_SIZE) {
             uLongf length = tiles_nb * TILE_SIZE;
+
+            if (bytestream2_get_bytes_left(gbc) < packed_tiles_size) {
+                ret = AVERROR_INVALIDDATA;
+                goto end;
+            }
+
             inflated_tiles = av_malloc(length);
             if (!inflated_tiles) {
                 ret = AVERROR(ENOMEM);
@@ -294,6 +301,10 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
             ret = AVERROR_INVALIDDATA;
             goto end;
         }
+        if (ctx->inflated_size < pixel_size) {
+            ret = AVERROR_INVALIDDATA;
+            goto end;
+        }
         ret = uncompress(ctx->inflated_buf, &len, gbc->buffer, packed_size);
         if (ret) {
             av_log(avctx, AV_LOG_ERROR, "Pixel deflate error %d.\n", ret);
@@ -304,7 +315,7 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
     }
 
     /* Allocate when needed */
-    ret = ff_reget_buffer(avctx, ctx->reference);
+    ret = ff_reget_buffer(avctx, ctx->reference, 0);
     if (ret < 0)
         goto end;
 
@@ -336,17 +347,8 @@ static int rscc_decode_frame(AVCodecContext *avctx, void *data,
 
     /* Palette handling */
     if (avctx->pix_fmt == AV_PIX_FMT_PAL8) {
-        int size;
-        const uint8_t *palette = av_packet_get_side_data(avpkt,
-                                                         AV_PKT_DATA_PALETTE,
-                                                         &size);
-        if (palette && size == AVPALETTE_SIZE) {
-            frame->palette_has_changed = 1;
-            memcpy(ctx->palette, palette, AVPALETTE_SIZE);
-        } else if (palette) {
-            av_log(avctx, AV_LOG_ERROR, "Palette size %d is wrong\n", size);
-        }
-        memcpy (frame->data[1], ctx->palette, AVPALETTE_SIZE);
+        frame->palette_has_changed = ff_copy_palette(ctx->palette, avpkt, avctx);
+        memcpy(frame->data[1], ctx->palette, AVPALETTE_SIZE);
     }
     // We only return a picture when enough of it is undamaged, this avoids copying nearly broken frames around
     if (ctx->valid_pixels < ctx->inflated_size)
@@ -360,7 +362,7 @@ end:
     return ret;
 }
 
-AVCodec ff_rscc_decoder = {
+const AVCodec ff_rscc_decoder = {
     .name           = "rscc",
     .long_name      = NULL_IF_CONFIG_SMALL("innoHeim/Rsupport Screen Capture Codec"),
     .type           = AVMEDIA_TYPE_VIDEO,