msvideo1enc: get rid of small repeated allocation

[nihav.git] / nihav-ms / src / codecs / msvideo1enc.rs

diff --git a/nihav-ms/src/codecs/msvideo1enc.rs b/nihav-ms/src/codecs/msvideo1enc.rs
index ff6189b24427ec06bef063fa5b43f12f186bdf94..8a6281d6217718985cb00bbe8ba41586abce1a6e 100644 (file)
--- a/nihav-ms/src/codecs/msvideo1enc.rs
+++ b/nihav-ms/src/codecs/msvideo1enc.rs
@@ -50,7 +50,8 @@ impl VQElement for Pixel16 {
         for i in 0..31 {
             offs[i + 1] = offs[i] + counts[i];
         }
-        let mut dst = vec![Pixel16(0); arr.len()];
+        let mut dst = [Pixel16(0); 16];
+        assert!(dst.len() >= arr.len());
         for pix in arr.iter() {
             let (r, g, b) = pix.unpack();
             let idx = match component {
@@ -61,7 +62,8 @@ impl VQElement for Pixel16 {
             dst[offs[idx]] = *pix;
             offs[idx] += 1;
         }
-        arr.copy_from_slice(dst.as_slice());
+        let len = arr.len();
+        arr.copy_from_slice(&dst[..len]);
     }
     fn max_dist_component(min: &Self, max: &Self) -> usize {
         let (r0, g0, b0) = max.unpack();
@@ -571,6 +573,6 @@ mod test {
             };
         //test_encoding_to_file(&dec_config, &enc_config, enc_params);
         test_encoding_md5(&dec_config, &enc_config, enc_params,
-                          &[0x8f0d3f66, 0xb91a6ee5, 0x59e4933e, 0x59c6fb0b]);
+                          &[0x0fc27a11, 0x04337f5d, 0xb8037362, 0xc4f69d8b]);
     }
 }