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-rw-r--r--media/libaom/src/av1/common/frame_buffers.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/media/libaom/src/av1/common/frame_buffers.c b/media/libaom/src/av1/common/frame_buffers.c
new file mode 100644
index 000000000..fd6c4bc79
--- /dev/null
+++ b/media/libaom/src/av1/common/frame_buffers.c
@@ -0,0 +1,91 @@
+/*
+ * 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 <assert.h>
+
+#include "av1/common/frame_buffers.h"
+#include "aom_mem/aom_mem.h"
+
+int av1_alloc_internal_frame_buffers(InternalFrameBufferList *list) {
+ assert(list != NULL);
+ av1_free_internal_frame_buffers(list);
+
+ list->num_internal_frame_buffers =
+ AOM_MAXIMUM_REF_BUFFERS + AOM_MAXIMUM_WORK_BUFFERS;
+ list->int_fb = (InternalFrameBuffer *)aom_calloc(
+ list->num_internal_frame_buffers, sizeof(*list->int_fb));
+ return (list->int_fb == NULL);
+}
+
+void av1_free_internal_frame_buffers(InternalFrameBufferList *list) {
+ int i;
+
+ assert(list != NULL);
+
+ for (i = 0; i < list->num_internal_frame_buffers; ++i) {
+ aom_free(list->int_fb[i].data);
+ list->int_fb[i].data = NULL;
+ }
+ aom_free(list->int_fb);
+ list->int_fb = NULL;
+}
+
+void av1_zero_unused_internal_frame_buffers(InternalFrameBufferList *list) {
+ int i;
+
+ assert(list != NULL);
+
+ for (i = 0; i < list->num_internal_frame_buffers; ++i) {
+ if (list->int_fb[i].data && !list->int_fb[i].in_use)
+ memset(list->int_fb[i].data, 0, list->int_fb[i].size);
+ }
+}
+
+int av1_get_frame_buffer(void *cb_priv, size_t min_size,
+ aom_codec_frame_buffer_t *fb) {
+ int i;
+ InternalFrameBufferList *const int_fb_list =
+ (InternalFrameBufferList *)cb_priv;
+ if (int_fb_list == NULL) return -1;
+
+ // Find a free frame buffer.
+ for (i = 0; i < int_fb_list->num_internal_frame_buffers; ++i) {
+ if (!int_fb_list->int_fb[i].in_use) break;
+ }
+
+ if (i == int_fb_list->num_internal_frame_buffers) return -1;
+
+ if (int_fb_list->int_fb[i].size < min_size) {
+ aom_free(int_fb_list->int_fb[i].data);
+ // The data must be zeroed to fix a valgrind error from the C loop filter
+ // due to access uninitialized memory in frame border. It could be
+ // skipped if border were totally removed.
+ int_fb_list->int_fb[i].data = (uint8_t *)aom_calloc(1, min_size);
+ if (!int_fb_list->int_fb[i].data) return -1;
+ int_fb_list->int_fb[i].size = min_size;
+ }
+
+ fb->data = int_fb_list->int_fb[i].data;
+ fb->size = int_fb_list->int_fb[i].size;
+ int_fb_list->int_fb[i].in_use = 1;
+
+ // Set the frame buffer's private data to point at the internal frame buffer.
+ fb->priv = &int_fb_list->int_fb[i];
+ return 0;
+}
+
+int av1_release_frame_buffer(void *cb_priv, aom_codec_frame_buffer_t *fb) {
+ InternalFrameBuffer *const int_fb = (InternalFrameBuffer *)fb->priv;
+ (void)cb_priv;
+ if (int_fb) int_fb->in_use = 0;
+ fb->priv = NULL;
+ return 0;
+}