dpx: sanitize aspect ratio.

Fixes some samples where the ratio is declared as -1/-1.
13 years ago · 8b421fad24
parent 2fc354f90d
commit 8b421fad24
1 changed files with 6 additions and 0 deletions
--- a/libavcodec/dpx.c
+++ b/libavcodec/dpx.c
@ -109,6 +109,12 @@ static int decode_frame(AVCodecContext *avctx,
    buf += 825;
    avctx->sample_aspect_ratio.num = read32(&buf, endian);
    avctx->sample_aspect_ratio.den = read32(&buf, endian);
+    if (avctx->sample_aspect_ratio.num > 0 && avctx->sample_aspect_ratio.den > 0)
+        av_reduce(&avctx->sample_aspect_ratio.num, &avctx->sample_aspect_ratio.den,
+                   avctx->sample_aspect_ratio.num,  avctx->sample_aspect_ratio.den,
+                  0x10000);
+    else
+        avctx->sample_aspect_ratio = (AVRational){ 0, 0 };

    switch (descriptor) {
        case 51: // RGBA