diff options
Diffstat (limited to 'media/libvpx/libvpx/vp8/encoder/treewriter.c')
-rw-r--r-- | media/libvpx/libvpx/vp8/encoder/treewriter.c | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/media/libvpx/libvpx/vp8/encoder/treewriter.c b/media/libvpx/libvpx/vp8/encoder/treewriter.c new file mode 100644 index 0000000000..f055f05229 --- /dev/null +++ b/media/libvpx/libvpx/vp8/encoder/treewriter.c @@ -0,0 +1,33 @@ +/* + * Copyright (c) 2010 The WebM project authors. All Rights Reserved. + * + * Use of this source code is governed by a BSD-style license + * that can be found in the LICENSE file in the root of the source + * tree. An additional intellectual property rights grant can be found + * in the file PATENTS. All contributing project authors may + * be found in the AUTHORS file in the root of the source tree. + */ + +#include "treewriter.h" + +static void cost(int *const C, vp8_tree T, const vp8_prob *const P, int i, + int c) { + const vp8_prob p = P[i >> 1]; + + do { + const vp8_tree_index j = T[i]; + const int d = c + vp8_cost_bit(p, i & 1); + + if (j <= 0) { + C[-j] = d; + } else { + cost(C, T, P, j, d); + } + } while (++i & 1); +} +void vp8_cost_tokens(int *c, const vp8_prob *p, vp8_tree t) { + cost(c, t, p, 0, 0); +} +void vp8_cost_tokens2(int *c, const vp8_prob *p, vp8_tree t, int start) { + cost(c, t, p, start, 0); +} |