/* * Copyright © 2019, VideoLAN and dav1d authors * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions are met: * * 1. Redistributions of source code must retain the above copyright notice, this *    list of conditions and the following disclaimer. * * 2. Redistributions in binary form must reproduce the above copyright notice, *    this list of conditions and the following disclaimer in the documentation *    and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE * DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ /* * Dav1dPlay FIFO helper */ typedef struct dp_fifo Dav1dPlayPtrFifo; /* Create a FIFO * * Creates a FIFO with the given capacity. * If the capacity is reached, new inserts into the FIFO * will block until enough space is available again. */Dav1dPlayPtrFifo *dp_fifo_create(size_t capacity); /* Destroy a FIFO * * The FIFO must be empty before it is destroyed! */void dp_fifo_destroy(Dav1dPlayPtrFifo *fifo); /* Shift FIFO * * Return the first item from the FIFO, thereby removing it from * the FIFO and making room for new entries. */void *dp_fifo_shift(Dav1dPlayPtrFifo *fifo); /* Push to FIFO * * Add an item to the end of the FIFO. * If the FIFO is full, this call will block until there is again enough * space in the FIFO, so calling this from the "consumer" thread if no * other thread will call dp_fifo_shift will lead to a deadlock. */void dp_fifo_push(Dav1dPlayPtrFifo *fifo, void *element);