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, 106 insertions, 0 deletions

diff --git a/third_party/aom/aomstats.c b/third_party/aom/aomstats.c
new file mode 100644
index 000000000..0cfeea2f1
--- /dev/null
+++ b/third_party/aom/aomstats.c
@@ -0,0 +1,106 @@
+/*
+ * Copyright (c) 2016, Alliance for Open Media. All rights reserved
+ *
+ * This source code is subject to the terms of the BSD 2 Clause License and
+ * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License
+ * was not distributed with this source code in the LICENSE file, you can
+ * obtain it at www.aomedia.org/license/software. If the Alliance for Open
+ * Media Patent License 1.0 was not distributed with this source code in the
+ * PATENTS file, you can obtain it at www.aomedia.org/license/patent.
+ */
+
+#include "./aomstats.h"
+
+#include <math.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "./tools_common.h"
+
+int stats_open_file(stats_io_t *stats, const char *fpf, int pass) {
+  int res;
+  stats->pass = pass;
+
+  if (pass == 0) {
+    stats->file = fopen(fpf, "wb");
+    stats->buf.sz = 0;
+    stats->buf.buf = NULL;
+    res = (stats->file != NULL);
+  } else {
+    size_t nbytes;
+
+    stats->file = fopen(fpf, "rb");
+
+    if (stats->file == NULL) fatal("First-pass stats file does not exist!");
+
+    if (fseek(stats->file, 0, SEEK_END))
+      fatal("First-pass stats file must be seekable!");
+
+    stats->buf.sz = stats->buf_alloc_sz = ftell(stats->file);
+    rewind(stats->file);
+
+    stats->buf.buf = malloc(stats->buf_alloc_sz);
+
+    if (!stats->buf.buf)
+      fatal("Failed to allocate first-pass stats buffer (%lu bytes)",
+            (unsigned int)stats->buf_alloc_sz);
+
+    nbytes = fread(stats->buf.buf, 1, stats->buf.sz, stats->file);
+    res = (nbytes == stats->buf.sz);
+  }
+
+  return res;
+}
+
+int stats_open_mem(stats_io_t *stats, int pass) {
+  int res;
+  stats->pass = pass;
+
+  if (!pass) {
+    stats->buf.sz = 0;
+    stats->buf_alloc_sz = 64 * 1024;
+    stats->buf.buf = malloc(stats->buf_alloc_sz);
+  }
+
+  stats->buf_ptr = stats->buf.buf;
+  res = (stats->buf.buf != NULL);
+  return res;
+}
+
+void stats_close(stats_io_t *stats, int last_pass) {
+  if (stats->file) {
+    if (stats->pass == last_pass) {
+      free(stats->buf.buf);
+    }
+
+    fclose(stats->file);
+    stats->file = NULL;
+  } else {
+    if (stats->pass == last_pass) free(stats->buf.buf);
+  }
+}
+
+void stats_write(stats_io_t *stats, const void *pkt, size_t len) {
+  if (stats->file) {
+    (void)fwrite(pkt, 1, len, stats->file);
+  } else {
+    if (stats->buf.sz + len > stats->buf_alloc_sz) {
+      size_t new_sz = stats->buf_alloc_sz + 64 * 1024;
+      char *new_ptr = realloc(stats->buf.buf, new_sz);
+
+      if (new_ptr) {
+        stats->buf_ptr = new_ptr + (stats->buf_ptr - (char *)stats->buf.buf);
+        stats->buf.buf = new_ptr;
+        stats->buf_alloc_sz = new_sz;
+      } else {
+        fatal("Failed to realloc firstpass stats buffer.");
+      }
+    }
+
+    memcpy(stats->buf_ptr, pkt, len);
+    stats->buf.sz += len;
+    stats->buf_ptr += len;
+  }
+}
+
+aom_fixed_buf_t stats_get(stats_io_t *stats) { return stats->buf; }