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, 103 insertions, 0 deletions

diff --git a/third_party/aom/av1/decoder/inspection.c b/third_party/aom/av1/decoder/inspection.c
new file mode 100644
index 000000000..2e8a61087
--- /dev/null
+++ b/third_party/aom/av1/decoder/inspection.c
@@ -0,0 +1,103 @@
+/*
+ * Copyright (c) 2017, 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 "av1/decoder/decoder.h"
+#include "av1/decoder/inspection.h"
+#include "av1/common/enums.h"
+#if CONFIG_CDEF
+#include "av1/common/cdef.h"
+#endif
+
+void ifd_init(insp_frame_data *fd, int frame_width, int frame_height) {
+  fd->mi_cols = ALIGN_POWER_OF_TWO(frame_width, 3) >> MI_SIZE_LOG2;
+  fd->mi_rows = ALIGN_POWER_OF_TWO(frame_height, 3) >> MI_SIZE_LOG2;
+  fd->mi_grid = (insp_mi_data *)aom_malloc(sizeof(insp_mi_data) * fd->mi_rows *
+                                           fd->mi_cols);
+}
+
+void ifd_clear(insp_frame_data *fd) {
+  aom_free(fd->mi_grid);
+  fd->mi_grid = NULL;
+}
+
+/* TODO(negge) This function may be called by more than one thread when using
+               a multi-threaded decoder and this may cause a data race. */
+int ifd_inspect(insp_frame_data *fd, void *decoder) {
+  struct AV1Decoder *pbi = (struct AV1Decoder *)decoder;
+  AV1_COMMON *const cm = &pbi->common;
+  // TODO(negge): Should this function just call ifd_clear() and ifd_init()?
+  if (fd->mi_rows != cm->mi_rows || fd->mi_cols != cm->mi_cols) {
+    return 0;
+  }
+  fd->show_frame = cm->show_frame;
+  fd->frame_type = cm->frame_type;
+  fd->base_qindex = cm->base_qindex;
+  fd->tile_mi_cols = cm->tile_width;
+  fd->tile_mi_rows = cm->tile_height;
+#if CONFIG_ACCOUNTING
+  fd->accounting = &pbi->accounting;
+#endif
+#if CONFIG_CDEF
+// TODO(negge): copy per frame CDEF data
+#endif
+  int i, j;
+  for (i = 0; i < MAX_SEGMENTS; i++) {
+    for (j = 0; j < 2; j++) {
+      fd->y_dequant[i][j] = cm->y_dequant[i][j];
+      fd->uv_dequant[i][j] = cm->uv_dequant[i][j];
+    }
+  }
+  for (j = 0; j < cm->mi_rows; j++) {
+    for (i = 0; i < cm->mi_cols; i++) {
+      const MB_MODE_INFO *mbmi =
+          &cm->mi_grid_visible[j * cm->mi_stride + i]->mbmi;
+      insp_mi_data *mi = &fd->mi_grid[j * cm->mi_cols + i];
+      // Segment
+      mi->segment_id = mbmi->segment_id;
+      // Motion Vectors
+      mi->mv[0].row = mbmi->mv[0].as_mv.row;
+      mi->mv[0].col = mbmi->mv[0].as_mv.col;
+      mi->mv[1].row = mbmi->mv[1].as_mv.row;
+      mi->mv[1].col = mbmi->mv[1].as_mv.col;
+      // Reference Frames
+      mi->ref_frame[0] = mbmi->ref_frame[0];
+      mi->ref_frame[1] = mbmi->ref_frame[1];
+      // Prediction Mode
+      mi->mode = mbmi->mode;
+      // Prediction Mode for Chromatic planes
+      if (mi->mode < INTRA_MODES) {
+        mi->uv_mode = mbmi->uv_mode;
+      } else {
+        mi->uv_mode = INTRA_INVALID;
+      }
+      // Block Size
+      mi->sb_type = mbmi->sb_type;
+      // Skip Flag
+      mi->skip = mbmi->skip;
+#if CONFIG_DUAL_FILTER
+      mi->filter[0] = mbmi->interp_filter[0];
+      mi->filter[1] = mbmi->interp_filter[1];
+#else
+      mi->filter = mbmi->interp_filter;
+#endif
+      // Transform
+      mi->tx_type = mbmi->tx_type;
+      mi->tx_size = mbmi->tx_size;
+
+#if CONFIG_CDEF
+      mi->cdef_level = cm->cdef_strengths[mbmi->cdef_strength] / CLPF_STRENGTHS;
+      mi->cdef_strength =
+          cm->cdef_strengths[mbmi->cdef_strength] % CLPF_STRENGTHS;
+      mi->cdef_strength += mi->cdef_strength == 3;
+#endif
+    }
+  }
+  return 1;
+}