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, 529 insertions, 0 deletions

diff --git a/third_party/aom/av1/common/thread_common.c b/third_party/aom/av1/common/thread_common.c
new file mode 100644
index 000000000..ca8b1b3bd
--- /dev/null
+++ b/third_party/aom/av1/common/thread_common.c
@@ -0,0 +1,529 @@
+/*
+ * 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_dsp/aom_dsp_common.h"
+#include "aom_mem/aom_mem.h"
+#include "av1/common/entropymode.h"
+#include "av1/common/thread_common.h"
+#include "av1/common/reconinter.h"
+
+#if CONFIG_MULTITHREAD
+static INLINE void mutex_lock(pthread_mutex_t *const mutex) {
+  const int kMaxTryLocks = 4000;
+  int locked = 0;
+  int i;
+
+  for (i = 0; i < kMaxTryLocks; ++i) {
+    if (!pthread_mutex_trylock(mutex)) {
+      locked = 1;
+      break;
+    }
+  }
+
+  if (!locked) pthread_mutex_lock(mutex);
+}
+#endif  // CONFIG_MULTITHREAD
+
+static INLINE void sync_read(AV1LfSync *const lf_sync, int r, int c) {
+#if CONFIG_MULTITHREAD
+  const int nsync = lf_sync->sync_range;
+
+  if (r && !(c & (nsync - 1))) {
+    pthread_mutex_t *const mutex = &lf_sync->mutex_[r - 1];
+    mutex_lock(mutex);
+
+    while (c > lf_sync->cur_sb_col[r - 1] - nsync) {
+      pthread_cond_wait(&lf_sync->cond_[r - 1], mutex);
+    }
+    pthread_mutex_unlock(mutex);
+  }
+#else
+  (void)lf_sync;
+  (void)r;
+  (void)c;
+#endif  // CONFIG_MULTITHREAD
+}
+
+static INLINE void sync_write(AV1LfSync *const lf_sync, int r, int c,
+                              const int sb_cols) {
+#if CONFIG_MULTITHREAD
+  const int nsync = lf_sync->sync_range;
+  int cur;
+  // Only signal when there are enough filtered SB for next row to run.
+  int sig = 1;
+
+  if (c < sb_cols - 1) {
+    cur = c;
+    if (c % nsync) sig = 0;
+  } else {
+    cur = sb_cols + nsync;
+  }
+
+  if (sig) {
+    mutex_lock(&lf_sync->mutex_[r]);
+
+    lf_sync->cur_sb_col[r] = cur;
+
+    pthread_cond_signal(&lf_sync->cond_[r]);
+    pthread_mutex_unlock(&lf_sync->mutex_[r]);
+  }
+#else
+  (void)lf_sync;
+  (void)r;
+  (void)c;
+  (void)sb_cols;
+#endif  // CONFIG_MULTITHREAD
+}
+
+#if !CONFIG_EXT_PARTITION_TYPES
+static INLINE enum lf_path get_loop_filter_path(
+    int y_only, struct macroblockd_plane planes[MAX_MB_PLANE]) {
+  if (y_only)
+    return LF_PATH_444;
+  else if (planes[1].subsampling_y == 1 && planes[1].subsampling_x == 1)
+    return LF_PATH_420;
+  else if (planes[1].subsampling_y == 0 && planes[1].subsampling_x == 0)
+    return LF_PATH_444;
+  else
+    return LF_PATH_SLOW;
+}
+
+static INLINE void loop_filter_block_plane_ver(
+    AV1_COMMON *cm, struct macroblockd_plane planes[MAX_MB_PLANE], int plane,
+    MODE_INFO **mi, int mi_row, int mi_col, enum lf_path path,
+    LOOP_FILTER_MASK *lfm) {
+  if (plane == 0) {
+    av1_filter_block_plane_ss00_ver(cm, &planes[0], mi_row, lfm);
+  } else {
+    switch (path) {
+      case LF_PATH_420:
+        av1_filter_block_plane_ss11_ver(cm, &planes[plane], mi_row, lfm);
+        break;
+      case LF_PATH_444:
+        av1_filter_block_plane_ss00_ver(cm, &planes[plane], mi_row, lfm);
+        break;
+      case LF_PATH_SLOW:
+        av1_filter_block_plane_non420_ver(cm, &planes[plane], mi, mi_row,
+                                          mi_col);
+        break;
+    }
+  }
+}
+
+static INLINE void loop_filter_block_plane_hor(
+    AV1_COMMON *cm, struct macroblockd_plane planes[MAX_MB_PLANE], int plane,
+    MODE_INFO **mi, int mi_row, int mi_col, enum lf_path path,
+    LOOP_FILTER_MASK *lfm) {
+  if (plane == 0) {
+    av1_filter_block_plane_ss00_hor(cm, &planes[0], mi_row, lfm);
+  } else {
+    switch (path) {
+      case LF_PATH_420:
+        av1_filter_block_plane_ss11_hor(cm, &planes[plane], mi_row, lfm);
+        break;
+      case LF_PATH_444:
+        av1_filter_block_plane_ss00_hor(cm, &planes[plane], mi_row, lfm);
+        break;
+      case LF_PATH_SLOW:
+        av1_filter_block_plane_non420_hor(cm, &planes[plane], mi, mi_row,
+                                          mi_col);
+        break;
+    }
+  }
+}
+#endif
+// Row-based multi-threaded loopfilter hook
+#if CONFIG_PARALLEL_DEBLOCKING
+static int loop_filter_ver_row_worker(AV1LfSync *const lf_sync,
+                                      LFWorkerData *const lf_data) {
+  const int num_planes = lf_data->y_only ? 1 : MAX_MB_PLANE;
+  int mi_row, mi_col;
+#if !CONFIG_EXT_PARTITION_TYPES
+  enum lf_path path = get_loop_filter_path(lf_data->y_only, lf_data->planes);
+#endif
+  for (mi_row = lf_data->start; mi_row < lf_data->stop;
+       mi_row += lf_sync->num_workers * lf_data->cm->mib_size) {
+    MODE_INFO **const mi =
+        lf_data->cm->mi_grid_visible + mi_row * lf_data->cm->mi_stride;
+
+    for (mi_col = 0; mi_col < lf_data->cm->mi_cols;
+         mi_col += lf_data->cm->mib_size) {
+      LOOP_FILTER_MASK lfm;
+      int plane;
+
+      av1_setup_dst_planes(lf_data->planes, lf_data->cm->sb_size,
+                           lf_data->frame_buffer, mi_row, mi_col);
+      av1_setup_mask(lf_data->cm, mi_row, mi_col, mi + mi_col,
+                     lf_data->cm->mi_stride, &lfm);
+
+#if CONFIG_EXT_PARTITION_TYPES
+      for (plane = 0; plane < num_planes; ++plane)
+        av1_filter_block_plane_non420_ver(lf_data->cm, &lf_data->planes[plane],
+                                          mi + mi_col, mi_row, mi_col);
+#else
+
+      for (plane = 0; plane < num_planes; ++plane)
+        loop_filter_block_plane_ver(lf_data->cm, lf_data->planes, plane,
+                                    mi + mi_col, mi_row, mi_col, path, &lfm);
+#endif
+    }
+  }
+  return 1;
+}
+
+static int loop_filter_hor_row_worker(AV1LfSync *const lf_sync,
+                                      LFWorkerData *const lf_data) {
+  const int num_planes = lf_data->y_only ? 1 : MAX_MB_PLANE;
+  const int sb_cols =
+      mi_cols_aligned_to_sb(lf_data->cm) >> lf_data->cm->mib_size_log2;
+  int mi_row, mi_col;
+#if !CONFIG_EXT_PARTITION_TYPES
+  enum lf_path path = get_loop_filter_path(lf_data->y_only, lf_data->planes);
+#endif
+
+  for (mi_row = lf_data->start; mi_row < lf_data->stop;
+       mi_row += lf_sync->num_workers * lf_data->cm->mib_size) {
+    MODE_INFO **const mi =
+        lf_data->cm->mi_grid_visible + mi_row * lf_data->cm->mi_stride;
+
+    for (mi_col = 0; mi_col < lf_data->cm->mi_cols;
+         mi_col += lf_data->cm->mib_size) {
+      const int r = mi_row >> lf_data->cm->mib_size_log2;
+      const int c = mi_col >> lf_data->cm->mib_size_log2;
+      LOOP_FILTER_MASK lfm;
+      int plane;
+
+      // TODO(wenhao.zhang@intel.com): For better parallelization, reorder
+      // the outer loop to column-based and remove the synchronizations here.
+      sync_read(lf_sync, r, c);
+
+      av1_setup_dst_planes(lf_data->planes, lf_data->cm->sb_size,
+                           lf_data->frame_buffer, mi_row, mi_col);
+      av1_setup_mask(lf_data->cm, mi_row, mi_col, mi + mi_col,
+                     lf_data->cm->mi_stride, &lfm);
+#if CONFIG_EXT_PARTITION_TYPES
+      for (plane = 0; plane < num_planes; ++plane)
+        av1_filter_block_plane_non420_hor(lf_data->cm, &lf_data->planes[plane],
+                                          mi + mi_col, mi_row, mi_col);
+#else
+      for (plane = 0; plane < num_planes; ++plane)
+        loop_filter_block_plane_hor(lf_data->cm, lf_data->planes, plane,
+                                    mi + mi_col, mi_row, mi_col, path, &lfm);
+#endif
+      sync_write(lf_sync, r, c, sb_cols);
+    }
+  }
+  return 1;
+}
+#else  //  CONFIG_PARALLEL_DEBLOCKING
+static int loop_filter_row_worker(AV1LfSync *const lf_sync,
+                                  LFWorkerData *const lf_data) {
+  const int num_planes = lf_data->y_only ? 1 : MAX_MB_PLANE;
+  const int sb_cols =
+      mi_cols_aligned_to_sb(lf_data->cm) >> lf_data->cm->mib_size_log2;
+  int mi_row, mi_col;
+#if !CONFIG_EXT_PARTITION_TYPES
+  enum lf_path path = get_loop_filter_path(lf_data->y_only, lf_data->planes);
+#endif  // !CONFIG_EXT_PARTITION_TYPES
+
+#if CONFIG_EXT_PARTITION
+  printf(
+      "STOPPING: This code has not been modified to work with the "
+      "extended coding unit size experiment");
+  exit(EXIT_FAILURE);
+#endif  // CONFIG_EXT_PARTITION
+
+  for (mi_row = lf_data->start; mi_row < lf_data->stop;
+       mi_row += lf_sync->num_workers * lf_data->cm->mib_size) {
+    MODE_INFO **const mi =
+        lf_data->cm->mi_grid_visible + mi_row * lf_data->cm->mi_stride;
+
+    for (mi_col = 0; mi_col < lf_data->cm->mi_cols;
+         mi_col += lf_data->cm->mib_size) {
+      const int r = mi_row >> lf_data->cm->mib_size_log2;
+      const int c = mi_col >> lf_data->cm->mib_size_log2;
+#if !CONFIG_EXT_PARTITION_TYPES
+      LOOP_FILTER_MASK lfm;
+#endif
+      int plane;
+
+      sync_read(lf_sync, r, c);
+
+      av1_setup_dst_planes(lf_data->planes, lf_data->cm->sb_size,
+                           lf_data->frame_buffer, mi_row, mi_col);
+#if CONFIG_EXT_PARTITION_TYPES
+      for (plane = 0; plane < num_planes; ++plane) {
+        av1_filter_block_plane_non420_ver(lf_data->cm, &lf_data->planes[plane],
+                                          mi + mi_col, mi_row, mi_col);
+        av1_filter_block_plane_non420_hor(lf_data->cm, &lf_data->planes[plane],
+                                          mi + mi_col, mi_row, mi_col);
+      }
+#else
+      av1_setup_mask(lf_data->cm, mi_row, mi_col, mi + mi_col,
+                     lf_data->cm->mi_stride, &lfm);
+
+      for (plane = 0; plane < num_planes; ++plane) {
+        loop_filter_block_plane_ver(lf_data->cm, lf_data->planes, plane,
+                                    mi + mi_col, mi_row, mi_col, path, &lfm);
+        loop_filter_block_plane_hor(lf_data->cm, lf_data->planes, plane,
+                                    mi + mi_col, mi_row, mi_col, path, &lfm);
+      }
+#endif  // CONFIG_EXT_PARTITION_TYPES
+      sync_write(lf_sync, r, c, sb_cols);
+    }
+  }
+  return 1;
+}
+#endif  //  CONFIG_PARALLEL_DEBLOCKING
+
+static void loop_filter_rows_mt(YV12_BUFFER_CONFIG *frame, AV1_COMMON *cm,
+                                struct macroblockd_plane planes[MAX_MB_PLANE],
+                                int start, int stop, int y_only,
+                                AVxWorker *workers, int nworkers,
+                                AV1LfSync *lf_sync) {
+  const AVxWorkerInterface *const winterface = aom_get_worker_interface();
+  // Number of superblock rows and cols
+  const int sb_rows = mi_rows_aligned_to_sb(cm) >> cm->mib_size_log2;
+  // Decoder may allocate more threads than number of tiles based on user's
+  // input.
+  const int tile_cols = cm->tile_cols;
+  const int num_workers = AOMMIN(nworkers, tile_cols);
+  int i;
+
+#if CONFIG_EXT_PARTITION
+  printf(
+      "STOPPING: This code has not been modified to work with the "
+      "extended coding unit size experiment");
+  exit(EXIT_FAILURE);
+#endif  // CONFIG_EXT_PARTITION
+
+  if (!lf_sync->sync_range || sb_rows != lf_sync->rows ||
+      num_workers > lf_sync->num_workers) {
+    av1_loop_filter_dealloc(lf_sync);
+    av1_loop_filter_alloc(lf_sync, cm, sb_rows, cm->width, num_workers);
+  }
+
+// Set up loopfilter thread data.
+// The decoder is capping num_workers because it has been observed that using
+// more threads on the loopfilter than there are cores will hurt performance
+// on Android. This is because the system will only schedule the tile decode
+// workers on cores equal to the number of tile columns. Then if the decoder
+// tries to use more threads for the loopfilter, it will hurt performance
+// because of contention. If the multithreading code changes in the future
+// then the number of workers used by the loopfilter should be revisited.
+
+#if CONFIG_PARALLEL_DEBLOCKING
+  // Initialize cur_sb_col to -1 for all SB rows.
+  memset(lf_sync->cur_sb_col, -1, sizeof(*lf_sync->cur_sb_col) * sb_rows);
+
+  // Filter all the vertical edges in the whole frame
+  for (i = 0; i < num_workers; ++i) {
+    AVxWorker *const worker = &workers[i];
+    LFWorkerData *const lf_data = &lf_sync->lfdata[i];
+
+    worker->hook = (AVxWorkerHook)loop_filter_ver_row_worker;
+    worker->data1 = lf_sync;
+    worker->data2 = lf_data;
+
+    // Loopfilter data
+    av1_loop_filter_data_reset(lf_data, frame, cm, planes);
+    lf_data->start = start + i * cm->mib_size;
+    lf_data->stop = stop;
+    lf_data->y_only = y_only;
+
+    // Start loopfiltering
+    if (i == num_workers - 1) {
+      winterface->execute(worker);
+    } else {
+      winterface->launch(worker);
+    }
+  }
+
+  // Wait till all rows are finished
+  for (i = 0; i < num_workers; ++i) {
+    winterface->sync(&workers[i]);
+  }
+
+  memset(lf_sync->cur_sb_col, -1, sizeof(*lf_sync->cur_sb_col) * sb_rows);
+  // Filter all the horizontal edges in the whole frame
+  for (i = 0; i < num_workers; ++i) {
+    AVxWorker *const worker = &workers[i];
+    LFWorkerData *const lf_data = &lf_sync->lfdata[i];
+
+    worker->hook = (AVxWorkerHook)loop_filter_hor_row_worker;
+    worker->data1 = lf_sync;
+    worker->data2 = lf_data;
+
+    // Loopfilter data
+    av1_loop_filter_data_reset(lf_data, frame, cm, planes);
+    lf_data->start = start + i * cm->mib_size;
+    lf_data->stop = stop;
+    lf_data->y_only = y_only;
+
+    // Start loopfiltering
+    if (i == num_workers - 1) {
+      winterface->execute(worker);
+    } else {
+      winterface->launch(worker);
+    }
+  }
+
+  // Wait till all rows are finished
+  for (i = 0; i < num_workers; ++i) {
+    winterface->sync(&workers[i]);
+  }
+#else   // CONFIG_PARALLEL_DEBLOCKING
+  // Initialize cur_sb_col to -1 for all SB rows.
+  memset(lf_sync->cur_sb_col, -1, sizeof(*lf_sync->cur_sb_col) * sb_rows);
+
+  for (i = 0; i < num_workers; ++i) {
+    AVxWorker *const worker = &workers[i];
+    LFWorkerData *const lf_data = &lf_sync->lfdata[i];
+
+    worker->hook = (AVxWorkerHook)loop_filter_row_worker;
+    worker->data1 = lf_sync;
+    worker->data2 = lf_data;
+
+    // Loopfilter data
+    av1_loop_filter_data_reset(lf_data, frame, cm, planes);
+    lf_data->start = start + i * cm->mib_size;
+    lf_data->stop = stop;
+    lf_data->y_only = y_only;
+
+    // Start loopfiltering
+    if (i == num_workers - 1) {
+      winterface->execute(worker);
+    } else {
+      winterface->launch(worker);
+    }
+  }
+
+  // Wait till all rows are finished
+  for (i = 0; i < num_workers; ++i) {
+    winterface->sync(&workers[i]);
+  }
+#endif  // CONFIG_PARALLEL_DEBLOCKING
+}
+
+void av1_loop_filter_frame_mt(YV12_BUFFER_CONFIG *frame, AV1_COMMON *cm,
+                              struct macroblockd_plane planes[MAX_MB_PLANE],
+                              int frame_filter_level, int y_only,
+                              int partial_frame, AVxWorker *workers,
+                              int num_workers, AV1LfSync *lf_sync) {
+  int start_mi_row, end_mi_row, mi_rows_to_filter;
+
+  if (!frame_filter_level) return;
+
+  start_mi_row = 0;
+  mi_rows_to_filter = cm->mi_rows;
+  if (partial_frame && cm->mi_rows > 8) {
+    start_mi_row = cm->mi_rows >> 1;
+    start_mi_row &= 0xfffffff8;
+    mi_rows_to_filter = AOMMAX(cm->mi_rows / 8, 8);
+  }
+  end_mi_row = start_mi_row + mi_rows_to_filter;
+  av1_loop_filter_frame_init(cm, frame_filter_level);
+
+  loop_filter_rows_mt(frame, cm, planes, start_mi_row, end_mi_row, y_only,
+                      workers, num_workers, lf_sync);
+}
+
+// Set up nsync by width.
+static INLINE int get_sync_range(int width) {
+  // nsync numbers are picked by testing. For example, for 4k
+  // video, using 4 gives best performance.
+  if (width < 640)
+    return 1;
+  else if (width <= 1280)
+    return 2;
+  else if (width <= 4096)
+    return 4;
+  else
+    return 8;
+}
+
+// Allocate memory for lf row synchronization
+void av1_loop_filter_alloc(AV1LfSync *lf_sync, AV1_COMMON *cm, int rows,
+                           int width, int num_workers) {
+  lf_sync->rows = rows;
+#if CONFIG_MULTITHREAD
+  {
+    int i;
+
+    CHECK_MEM_ERROR(cm, lf_sync->mutex_,
+                    aom_malloc(sizeof(*lf_sync->mutex_) * rows));
+    if (lf_sync->mutex_) {
+      for (i = 0; i < rows; ++i) {
+        pthread_mutex_init(&lf_sync->mutex_[i], NULL);
+      }
+    }
+
+    CHECK_MEM_ERROR(cm, lf_sync->cond_,
+                    aom_malloc(sizeof(*lf_sync->cond_) * rows));
+    if (lf_sync->cond_) {
+      for (i = 0; i < rows; ++i) {
+        pthread_cond_init(&lf_sync->cond_[i], NULL);
+      }
+    }
+  }
+#endif  // CONFIG_MULTITHREAD
+
+  CHECK_MEM_ERROR(cm, lf_sync->lfdata,
+                  aom_malloc(num_workers * sizeof(*lf_sync->lfdata)));
+  lf_sync->num_workers = num_workers;
+
+  CHECK_MEM_ERROR(cm, lf_sync->cur_sb_col,
+                  aom_malloc(sizeof(*lf_sync->cur_sb_col) * rows));
+
+  // Set up nsync.
+  lf_sync->sync_range = get_sync_range(width);
+}
+
+// Deallocate lf synchronization related mutex and data
+void av1_loop_filter_dealloc(AV1LfSync *lf_sync) {
+  if (lf_sync != NULL) {
+#if CONFIG_MULTITHREAD
+    int i;
+
+    if (lf_sync->mutex_ != NULL) {
+      for (i = 0; i < lf_sync->rows; ++i) {
+        pthread_mutex_destroy(&lf_sync->mutex_[i]);
+      }
+      aom_free(lf_sync->mutex_);
+    }
+    if (lf_sync->cond_ != NULL) {
+      for (i = 0; i < lf_sync->rows; ++i) {
+        pthread_cond_destroy(&lf_sync->cond_[i]);
+      }
+      aom_free(lf_sync->cond_);
+    }
+#endif  // CONFIG_MULTITHREAD
+    aom_free(lf_sync->lfdata);
+    aom_free(lf_sync->cur_sb_col);
+    // clear the structure as the source of this call may be a resize in which
+    // case this call will be followed by an _alloc() which may fail.
+    av1_zero(*lf_sync);
+  }
+}
+
+// Accumulate frame counts. FRAME_COUNTS consist solely of 'unsigned int'
+// members, so we treat it as an array, and sum over the whole length.
+void av1_accumulate_frame_counts(FRAME_COUNTS *acc_counts,
+                                 FRAME_COUNTS *counts) {
+  unsigned int *const acc = (unsigned int *)acc_counts;
+  const unsigned int *const cnt = (unsigned int *)counts;
+
+  const unsigned int n_counts = sizeof(FRAME_COUNTS) / sizeof(unsigned int);
+  unsigned int i;
+
+  for (i = 0; i < n_counts; i++) acc[i] += cnt[i];
+}