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, 209 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/alloccommon.c b/third_party/aom/av1/common/alloccommon.c
new file mode 100644
index 000000000..79d41a9c8
--- /dev/null
+++ b/third_party/aom/av1/common/alloccommon.c
@@ -0,0 +1,209 @@
+/*
+ *
+ * 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 "./aom_config.h"
+#include "aom_mem/aom_mem.h"
+
+#include "av1/common/alloccommon.h"
+#include "av1/common/blockd.h"
+#include "av1/common/entropymode.h"
+#include "av1/common/entropymv.h"
+#include "av1/common/onyxc_int.h"
+
+void av1_set_mb_mi(AV1_COMMON *cm, int width, int height) {
+  // TODO(jingning): Fine tune the loop filter operations and bring this
+  // back to integer multiple of 4 for cb4x4.
+  const int aligned_width = ALIGN_POWER_OF_TWO(width, 3);
+  const int aligned_height = ALIGN_POWER_OF_TWO(height, 3);
+
+  cm->mi_cols = aligned_width >> MI_SIZE_LOG2;
+  cm->mi_rows = aligned_height >> MI_SIZE_LOG2;
+  cm->mi_stride = calc_mi_size(cm->mi_cols);
+
+#if CONFIG_CB4X4
+  cm->mb_cols = (cm->mi_cols + 2) >> 2;
+  cm->mb_rows = (cm->mi_rows + 2) >> 2;
+#else
+  cm->mb_cols = (cm->mi_cols + 1) >> 1;
+  cm->mb_rows = (cm->mi_rows + 1) >> 1;
+#endif
+  cm->MBs = cm->mb_rows * cm->mb_cols;
+}
+
+static int alloc_seg_map(AV1_COMMON *cm, int seg_map_size) {
+  int i;
+
+  for (i = 0; i < NUM_PING_PONG_BUFFERS; ++i) {
+    cm->seg_map_array[i] = (uint8_t *)aom_calloc(seg_map_size, 1);
+    if (cm->seg_map_array[i] == NULL) return 1;
+  }
+  cm->seg_map_alloc_size = seg_map_size;
+
+  // Init the index.
+  cm->seg_map_idx = 0;
+  cm->prev_seg_map_idx = 1;
+
+  cm->current_frame_seg_map = cm->seg_map_array[cm->seg_map_idx];
+  if (!cm->frame_parallel_decode)
+    cm->last_frame_seg_map = cm->seg_map_array[cm->prev_seg_map_idx];
+
+  return 0;
+}
+
+static void free_seg_map(AV1_COMMON *cm) {
+  int i;
+
+  for (i = 0; i < NUM_PING_PONG_BUFFERS; ++i) {
+    aom_free(cm->seg_map_array[i]);
+    cm->seg_map_array[i] = NULL;
+  }
+
+  cm->current_frame_seg_map = NULL;
+
+  if (!cm->frame_parallel_decode) {
+    cm->last_frame_seg_map = NULL;
+  }
+}
+
+void av1_free_ref_frame_buffers(BufferPool *pool) {
+  int i;
+
+  for (i = 0; i < FRAME_BUFFERS; ++i) {
+    if (pool->frame_bufs[i].ref_count > 0 &&
+        pool->frame_bufs[i].raw_frame_buffer.data != NULL) {
+      pool->release_fb_cb(pool->cb_priv, &pool->frame_bufs[i].raw_frame_buffer);
+      pool->frame_bufs[i].ref_count = 0;
+    }
+    aom_free(pool->frame_bufs[i].mvs);
+    pool->frame_bufs[i].mvs = NULL;
+    aom_free_frame_buffer(&pool->frame_bufs[i].buf);
+  }
+}
+
+#if CONFIG_LOOP_RESTORATION
+// Assumes cm->rst_info[p].restoration_tilesize is already initialized
+void av1_alloc_restoration_buffers(AV1_COMMON *cm) {
+  int p;
+  av1_alloc_restoration_struct(cm, &cm->rst_info[0], cm->width, cm->height);
+  for (p = 1; p < MAX_MB_PLANE; ++p)
+    av1_alloc_restoration_struct(
+        cm, &cm->rst_info[p], ROUND_POWER_OF_TWO(cm->width, cm->subsampling_x),
+        ROUND_POWER_OF_TWO(cm->height, cm->subsampling_y));
+  aom_free(cm->rst_internal.tmpbuf);
+  CHECK_MEM_ERROR(cm, cm->rst_internal.tmpbuf,
+                  (int32_t *)aom_memalign(16, RESTORATION_TMPBUF_SIZE));
+}
+
+void av1_free_restoration_buffers(AV1_COMMON *cm) {
+  int p;
+  for (p = 0; p < MAX_MB_PLANE; ++p)
+    av1_free_restoration_struct(&cm->rst_info[p]);
+  aom_free(cm->rst_internal.tmpbuf);
+  cm->rst_internal.tmpbuf = NULL;
+}
+#endif  // CONFIG_LOOP_RESTORATION
+
+void av1_free_context_buffers(AV1_COMMON *cm) {
+  int i;
+  cm->free_mi(cm);
+  free_seg_map(cm);
+  for (i = 0; i < MAX_MB_PLANE; i++) {
+    aom_free(cm->above_context[i]);
+    cm->above_context[i] = NULL;
+  }
+  aom_free(cm->above_seg_context);
+  cm->above_seg_context = NULL;
+#if CONFIG_VAR_TX
+  aom_free(cm->above_txfm_context);
+  cm->above_txfm_context = NULL;
+#endif
+}
+
+int av1_alloc_context_buffers(AV1_COMMON *cm, int width, int height) {
+  int new_mi_size;
+
+  av1_set_mb_mi(cm, width, height);
+  new_mi_size = cm->mi_stride * calc_mi_size(cm->mi_rows);
+  if (cm->mi_alloc_size < new_mi_size) {
+    cm->free_mi(cm);
+    if (cm->alloc_mi(cm, new_mi_size)) goto fail;
+  }
+
+  if (cm->seg_map_alloc_size < cm->mi_rows * cm->mi_cols) {
+    // Create the segmentation map structure and set to 0.
+    free_seg_map(cm);
+    if (alloc_seg_map(cm, cm->mi_rows * cm->mi_cols)) goto fail;
+  }
+
+  if (cm->above_context_alloc_cols < cm->mi_cols) {
+    // TODO(geza.lore): These are bigger than they need to be.
+    // cm->tile_width would be enough but it complicates indexing a
+    // little elsewhere.
+    const int aligned_mi_cols =
+        ALIGN_POWER_OF_TWO(cm->mi_cols, MAX_MIB_SIZE_LOG2);
+    int i;
+
+    for (i = 0; i < MAX_MB_PLANE; i++) {
+      aom_free(cm->above_context[i]);
+      cm->above_context[i] = (ENTROPY_CONTEXT *)aom_calloc(
+          2 * aligned_mi_cols, sizeof(*cm->above_context[0]));
+      if (!cm->above_context[i]) goto fail;
+    }
+
+    aom_free(cm->above_seg_context);
+    cm->above_seg_context = (PARTITION_CONTEXT *)aom_calloc(
+        aligned_mi_cols, sizeof(*cm->above_seg_context));
+    if (!cm->above_seg_context) goto fail;
+
+#if CONFIG_VAR_TX
+    aom_free(cm->above_txfm_context);
+    cm->above_txfm_context = (TXFM_CONTEXT *)aom_calloc(
+        aligned_mi_cols, sizeof(*cm->above_txfm_context));
+    if (!cm->above_txfm_context) goto fail;
+#endif
+
+    cm->above_context_alloc_cols = aligned_mi_cols;
+  }
+
+  return 0;
+
+fail:
+  // clear the mi_* values to force a realloc on resync
+  av1_set_mb_mi(cm, 0, 0);
+  av1_free_context_buffers(cm);
+  return 1;
+}
+
+void av1_remove_common(AV1_COMMON *cm) {
+  av1_free_context_buffers(cm);
+
+  aom_free(cm->fc);
+  cm->fc = NULL;
+  aom_free(cm->frame_contexts);
+  cm->frame_contexts = NULL;
+}
+
+void av1_init_context_buffers(AV1_COMMON *cm) {
+  cm->setup_mi(cm);
+  if (cm->last_frame_seg_map && !cm->frame_parallel_decode)
+    memset(cm->last_frame_seg_map, 0, cm->mi_rows * cm->mi_cols);
+}
+
+void av1_swap_current_and_last_seg_map(AV1_COMMON *cm) {
+  // Swap indices.
+  const int tmp = cm->seg_map_idx;
+  cm->seg_map_idx = cm->prev_seg_map_idx;
+  cm->prev_seg_map_idx = tmp;
+
+  cm->current_frame_seg_map = cm->seg_map_array[cm->seg_map_idx];
+  cm->last_frame_seg_map = cm->seg_map_array[cm->prev_seg_map_idx];
+}