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-rw-r--r--media/libvpx/vp9/common/vp9_frame_buffers.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/media/libvpx/vp9/common/vp9_frame_buffers.c b/media/libvpx/vp9/common/vp9_frame_buffers.c
new file mode 100644
index 000000000..0f41d6698
--- /dev/null
+++ b/media/libvpx/vp9/common/vp9_frame_buffers.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2014 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 <assert.h>
+
+#include "vp9/common/vp9_frame_buffers.h"
+#include "vpx_mem/vpx_mem.h"
+
+int vp9_alloc_internal_frame_buffers(InternalFrameBufferList *list) {
+ assert(list != NULL);
+ vp9_free_internal_frame_buffers(list);
+
+ list->num_internal_frame_buffers =
+ VP9_MAXIMUM_REF_BUFFERS + VPX_MAXIMUM_WORK_BUFFERS;
+ list->int_fb =
+ (InternalFrameBuffer *)vpx_calloc(list->num_internal_frame_buffers,
+ sizeof(*list->int_fb));
+ return (list->int_fb == NULL);
+}
+
+void vp9_free_internal_frame_buffers(InternalFrameBufferList *list) {
+ int i;
+
+ assert(list != NULL);
+
+ for (i = 0; i < list->num_internal_frame_buffers; ++i) {
+ vpx_free(list->int_fb[i].data);
+ list->int_fb[i].data = NULL;
+ }
+ vpx_free(list->int_fb);
+ list->int_fb = NULL;
+}
+
+int vp9_get_frame_buffer(void *cb_priv, size_t min_size,
+ vpx_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) {
+ int_fb_list->int_fb[i].data =
+ (uint8_t *)vpx_realloc(int_fb_list->int_fb[i].data, min_size);
+ if (!int_fb_list->int_fb[i].data)
+ return -1;
+
+ // This memset is needed for fixing valgrind error from C loop filter
+ // due to access uninitialized memory in frame border. It could be
+ // removed if border is totally removed.
+ memset(int_fb_list->int_fb[i].data, 0, min_size);
+ 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 vp9_release_frame_buffer(void *cb_priv, vpx_codec_frame_buffer_t *fb) {
+ InternalFrameBuffer *const int_fb = (InternalFrameBuffer *)fb->priv;
+ (void)cb_priv;
+ if (int_fb)
+ int_fb->in_use = 0;
+ return 0;
+}