text: /*
   *  Copyright (c) 2010 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 "./vpx_config.h"
  #include "vpx_mem/vpx_mem.h"
  
  #include "vp9/common/vp9_alloccommon.h"
  #include "vp9/common/vp9_blockd.h"
  #include "vp9/common/vp9_entropymode.h"
  #include "vp9/common/vp9_entropymv.h"
  #include "vp9/common/vp9_onyxc_int.h"
  
  // TODO(hkuang): Don't need to lock the whole pool after implementing atomic
  // frame reference count.
  void lock_buffer_pool(BufferPool *const pool) {
  #if CONFIG_MULTITHREAD
    pthread_mutex_lock(&pool->pool_mutex);
  #else
    (void)pool;
  #endif
  }
  
  void unlock_buffer_pool(BufferPool *const pool) {
  #if CONFIG_MULTITHREAD
    pthread_mutex_unlock(&pool->pool_mutex);
  #else
    (void)pool;
  #endif
  }
  
  void vp9_set_mb_mi(VP9_COMMON *cm, int width, int height) {
    const int aligned_width = ALIGN_POWER_OF_TWO(width, MI_SIZE_LOG2);
    const int aligned_height = ALIGN_POWER_OF_TWO(height, MI_SIZE_LOG2);
  
    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);
  
    cm->mb_cols = (cm->mi_cols + 1) >> 1;
    cm->mb_rows = (cm->mi_rows + 1) >> 1;
    cm->MBs = cm->mb_rows * cm->mb_cols;
  }
  
  static int alloc_seg_map(VP9_COMMON *cm, int seg_map_size) {
    int i;
  
    for (i = 0; i < NUM_PING_PONG_BUFFERS; ++i) {
      cm->seg_map_array[i] = (uint8_t *)vpx_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(VP9_COMMON *cm) {
    int i;
  
    for (i = 0; i < NUM_PING_PONG_BUFFERS; ++i) {
      vpx_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 vp9_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;
      }
      vpx_free(pool->frame_bufs[i].mvs);
      pool->frame_bufs[i].mvs = NULL;
      vpx_free_frame_buffer(&pool->frame_bufs[i].buf);
    }
  }
  
  void vp9_free_postproc_buffers(VP9_COMMON *cm) {
  #if CONFIG_VP9_POSTPROC
    vpx_free_frame_buffer(&cm->post_proc_buffer);
    vpx_free_frame_buffer(&cm->post_proc_buffer_int);
    vpx_free(cm->postproc_state.limits);
    cm->postproc_state.limits = NULL;
    vpx_free(cm->postproc_state.generated_noise);
    cm->postproc_state.generated_noise = NULL;
  #else
    (void)cm;
  #endif
  }
  
  void vp9_free_context_buffers(VP9_COMMON *cm) {
    cm->free_mi(cm);
    free_seg_map(cm);
    vpx_free(cm->above_context);
    cm->above_context = NULL;
    vpx_free(cm->above_seg_context);
    cm->above_seg_context = NULL;
    vpx_free(cm->lf.lfm);
    cm->lf.lfm = NULL;
  }
  
  int vp9_alloc_loop_filter(VP9_COMMON *cm) {
    vpx_free(cm->lf.lfm);
    // Each lfm holds bit masks for all the 8x8 blocks in a 64x64 region.  The
    // stride and rows are rounded up / truncated to a multiple of 8.
    cm->lf.lfm_stride = (cm->mi_cols + (MI_BLOCK_SIZE - 1)) >> 3;
    cm->lf.lfm = (LOOP_FILTER_MASK *)vpx_calloc(
        ((cm->mi_rows + (MI_BLOCK_SIZE - 1)) >> 3) * cm->lf.lfm_stride,
        sizeof(*cm->lf.lfm));
    if (!cm->lf.lfm) return 1;
    return 0;
  }
  
  int vp9_alloc_context_buffers(VP9_COMMON *cm, int width, int height) {
    int new_mi_size;
  
    vp9_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) {
      vpx_free(cm->above_context);
      cm->above_context = (ENTROPY_CONTEXT *)vpx_calloc(
          2 * mi_cols_aligned_to_sb(cm->mi_cols) * MAX_MB_PLANE,
          sizeof(*cm->above_context));
      if (!cm->above_context) goto fail;
  
      vpx_free(cm->above_seg_context);
      cm->above_seg_context = (PARTITION_CONTEXT *)vpx_calloc(
          mi_cols_aligned_to_sb(cm->mi_cols), sizeof(*cm->above_seg_context));
      if (!cm->above_seg_context) goto fail;
      cm->above_context_alloc_cols = cm->mi_cols;
    }
  
    if (vp9_alloc_loop_filter(cm)) goto fail;
  
    return 0;
  
  fail:
    // clear the mi_* values to force a realloc on resync
    vp9_set_mb_mi(cm, 0, 0);
    vp9_free_context_buffers(cm);
    return 1;
  }
  
  void vp9_remove_common(VP9_COMMON *cm) {
    vp9_free_context_buffers(cm);
  
    vpx_free(cm->fc);
    cm->fc = NULL;
    vpx_free(cm->frame_contexts);
    cm->frame_contexts = NULL;
  }
  
  void vp9_init_context_buffers(VP9_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 vp9_swap_current_and_last_seg_map(VP9_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];
  }
  