X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavcodec%2Fdnxhdenc.c;h=e4c6274ae43baccc92cc61816007926efbe811f9;hb=bd36ec55bef7c446079e192655d065fd86483876;hp=e1f99706f7473a8591a0eae043abfe85a4ee9a65;hpb=173715d2918a8b2674e2d93e74d36df037ce4409;p=ffmpeg

diff --git a/libavcodec/dnxhdenc.c b/libavcodec/dnxhdenc.c
index e1f99706f74..e4c6274ae43 100644
--- a/libavcodec/dnxhdenc.c
+++ b/libavcodec/dnxhdenc.c
@@ -578,9 +578,8 @@ static int dnxhd_encode_thread(AVCodecContext *avctx, void *arg, int jobnr, int
 
         for (i = 0; i < 8; i++) {
             DCTELEM *block = ctx->blocks[i];
-            int last_index, overflow;
-            int n = dnxhd_switch_matrix(ctx, i);
-            last_index = ctx->m.dct_quantize(&ctx->m, block, 4&(2*i), qscale, &overflow);
+            int overflow, n = dnxhd_switch_matrix(ctx, i);
+            int last_index = ctx->m.dct_quantize(&ctx->m, block, 4&(2*i), qscale, &overflow);
             //START_TIMER;
             dnxhd_encode_block(ctx, block, last_index, n);
             //STOP_TIMER("encode_block");
@@ -680,7 +679,8 @@ static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)
                 int qscale = 1;
                 int mb = y*ctx->m.mb_width+x;
                 for (q = 1; q < avctx->qmax; q++) {
-                    unsigned score = ctx->mb_rc[q][mb].bits*lambda+(ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);
+                    unsigned score = ctx->mb_rc[q][mb].bits*lambda+
+                        ((unsigned)ctx->mb_rc[q][mb].ssd<<LAMBDA_FRAC_BITS);
                     if (score < min) {
                         min = score;
                         qscale = q;
@@ -707,7 +707,7 @@ static int dnxhd_encode_rdo(AVCodecContext *avctx, DNXHDEncContext *ctx)
                 lambda = (lambda+last_higher)>>1;
             else
                 lambda -= down_step;
-            down_step *= 5; // XXX tune ?
+            down_step = FFMIN((int64_t)down_step*5, INT_MAX);
             up_step = 1<<LAMBDA_FRAC_BITS;
             lambda = FFMAX(1, lambda);
             if (lambda == last_lower)