func: int ff_alloc_entries(AVCodecContext *avctx, int count)
  
  {
  
      int i;
  
  
  
      if (avctx->active_thread_type & FF_THREAD_SLICE)  {
  
          SliceThreadContext *p = avctx->internal->thread_ctx;
  
          p->thread_count  = avctx->thread_count;
  
          p->entries       = av_mallocz_array(count, sizeof(int));
  
  
  
          if (!p->entries) {
  
              return AVERROR(ENOMEM);
  
          }
  
  
  
          p->entries_count  = count;
  
          p->progress_mutex = av_malloc_array(p->thread_count, sizeof(pthread_mutex_t));
  
          p->progress_cond  = av_malloc_array(p->thread_count, sizeof(pthread_cond_t));
  
  
  
          for (i = 0; i < p->thread_count; i++) {
  
              pthread_mutex_init(&p->progress_mutex[i], NULL);
  
              pthread_cond_init(&p->progress_cond[i], NULL);
  
          }
  
      }
  
  
  
      return 0;
  
  }
  