Import aom library

This is the reference implementation for the Alliance for Open Media's av1 video code.

The commit used was 4d668d7feb1f8abd809d1bca0418570a7f142a36.

1 files changed, 158 insertions, 0 deletions

diff --git a/third_party/aom/tools/ftfy.sh b/third_party/aom/tools/ftfy.sh
new file mode 100755
index 000000000..315da1af5
--- /dev/null
+++ b/third_party/aom/tools/ftfy.sh
@@ -0,0 +1,158 @@
+#!/bin/sh
+self="$0"
+dirname_self=$(dirname "$self")
+
+usage() {
+  cat <<EOF >&2
+Usage: $self [option]
+
+This script applies a whitespace transformation to the commit at HEAD. If no
+options are given, then the modified files are left in the working tree.
+
+Options:
+  -h, --help     Shows this message
+  -n, --dry-run  Shows a diff of the changes to be made.
+  --amend        Squashes the changes into the commit at HEAD
+                     This option will also reformat the commit message.
+  --commit       Creates a new commit containing only the whitespace changes
+  --msg-only     Reformat the commit message only, ignore the patch itself.
+
+EOF
+  rm -f ${CLEAN_FILES}
+  exit 1
+}
+
+
+log() {
+  echo "${self##*/}: $@" >&2
+}
+
+
+aom_style() {
+  for f; do
+    case "$f" in
+      *.h|*.c|*.cc)
+        clang-format -i --style=file "$f"
+        ;;
+    esac
+  done
+}
+
+
+apply() {
+  [ $INTERSECT_RESULT -ne 0 ] && patch -p1 < "$1"
+}
+
+
+commit() {
+  LAST_CHANGEID=$(git show | awk '/Change-Id:/{print $2}')
+  if [ -z "$LAST_CHANGEID" ]; then
+    log "HEAD doesn't have a Change-Id, unable to generate a new commit"
+    exit 1
+  fi
+
+  # Build a deterministic Change-Id from the parent's
+  NEW_CHANGEID=${LAST_CHANGEID}-styled
+  NEW_CHANGEID=I$(echo $NEW_CHANGEID | git hash-object --stdin)
+
+  # Commit, preserving authorship from the parent commit.
+  git commit -a -C HEAD > /dev/null
+  git commit --amend -F- << EOF
+Cosmetic: Fix whitespace in change ${LAST_CHANGEID:0:9}
+
+Change-Id: ${NEW_CHANGEID}
+EOF
+}
+
+
+show_commit_msg_diff() {
+  if [ $DIFF_MSG_RESULT -ne 0 ]; then
+    log "Modified commit message:"
+    diff -u "$ORIG_COMMIT_MSG" "$NEW_COMMIT_MSG" | tail -n +3
+  fi
+}
+
+
+amend() {
+  show_commit_msg_diff
+  if [ $DIFF_MSG_RESULT -ne 0 ] || [ $INTERSECT_RESULT -ne 0 ]; then
+    git commit -a --amend -F "$NEW_COMMIT_MSG"
+  fi
+}
+
+
+diff_msg() {
+  git log -1 --format=%B > "$ORIG_COMMIT_MSG"
+  "${dirname_self}"/wrap-commit-msg.py \
+      < "$ORIG_COMMIT_MSG" > "$NEW_COMMIT_MSG"
+  cmp -s "$ORIG_COMMIT_MSG" "$NEW_COMMIT_MSG"
+  DIFF_MSG_RESULT=$?
+}
+
+
+# Temporary files
+ORIG_DIFF=orig.diff.$$
+MODIFIED_DIFF=modified.diff.$$
+FINAL_DIFF=final.diff.$$
+ORIG_COMMIT_MSG=orig.commit-msg.$$
+NEW_COMMIT_MSG=new.commit-msg.$$
+CLEAN_FILES="${ORIG_DIFF} ${MODIFIED_DIFF} ${FINAL_DIFF}"
+CLEAN_FILES="${CLEAN_FILES} ${ORIG_COMMIT_MSG} ${NEW_COMMIT_MSG}"
+
+# Preconditions
+[ $# -lt 2 ] || usage
+
+if ! clang-format -version >/dev/null 2>&1; then
+  log "clang-format not found"
+  exit 1
+fi
+
+if ! git diff --quiet HEAD; then
+  log "Working tree is dirty, commit your changes first"
+  exit 1
+fi
+
+# Need to be in the root
+cd "$(git rev-parse --show-toplevel)"
+
+# Collect the original diff
+git show > "${ORIG_DIFF}"
+
+# Apply the style guide on new and modified files and collect its diff
+for f in $(git diff HEAD^ --name-only -M90 --diff-filter=AM); do
+  case "$f" in
+    third_party/*) continue;;
+  esac
+  aom_style "$f"
+done
+git diff --no-color --no-ext-diff > "${MODIFIED_DIFF}"
+
+# Intersect the two diffs
+"${dirname_self}"/intersect-diffs.py \
+    "${ORIG_DIFF}" "${MODIFIED_DIFF}" > "${FINAL_DIFF}"
+INTERSECT_RESULT=$?
+git reset --hard >/dev/null
+
+# Fixup the commit message
+diff_msg
+
+# Handle options
+if [ -n "$1" ]; then
+  case "$1" in
+    -h|--help) usage;;
+    -n|--dry-run) cat "${FINAL_DIFF}"; show_commit_msg_diff;;
+    --commit) apply "${FINAL_DIFF}"; commit;;
+    --amend) apply "${FINAL_DIFF}"; amend;;
+    --msg-only) amend;;
+    *) usage;;
+  esac
+else
+  apply "${FINAL_DIFF}"
+  if ! git diff --quiet; then
+    log "Formatting changes applied, verify and commit."
+    log "See also: http://www.webmproject.org/code/contribute/conventions/"
+    git diff --stat
+  fi
+fi
+
+rm -f ${CLEAN_FILES}