chromium/third_party/dav1d/libdav1d/src/thread_task.c

/*
 * Copyright © 2018, VideoLAN and dav1d authors
 * Copyright © 2018, Two Orioles, LLC
 * 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.
 */

#include "config.h"

#include "common/frame.h"

#include "src/thread_task.h"
#include "src/fg_apply.h"

// This function resets the cur pointer to the first frame theoretically
// executable after a task completed (ie. each time we update some progress or
// insert some tasks in the queue).
// When frame_idx is set, it can be either from a completed task, or from tasks
// inserted in the queue, in which case we have to make sure the cur pointer
// isn't past this insert.
// The special case where frame_idx is UINT_MAX is to handle the reset after
// completing a task and locklessly signaling progress. In this case we don't
// enter a critical section, which is needed for this function, so we set an
// atomic for a delayed handling, happening here. Meaning we can call this
// function without any actual update other than what's in the atomic, hence
// this special case.
static inline int reset_task_cur(const Dav1dContext *const c,
                                 struct TaskThreadData *const ttd,
                                 unsigned frame_idx)
{ … }

static inline void reset_task_cur_async(struct TaskThreadData *const ttd,
                                        unsigned frame_idx, unsigned n_frames)
{ … }

static void insert_tasks_between(Dav1dFrameContext *const f,
                                 Dav1dTask *const first, Dav1dTask *const last,
                                 Dav1dTask *const a, Dav1dTask *const b,
                                 const int cond_signal)
{ … }

static void insert_tasks(Dav1dFrameContext *const f,
                         Dav1dTask *const first, Dav1dTask *const last,
                         const int cond_signal)
{ … }

static inline void insert_task(Dav1dFrameContext *const f,
                               Dav1dTask *const t, const int cond_signal)
{ … }

static inline void add_pending(Dav1dFrameContext *const f, Dav1dTask *const t) { … }

static inline int merge_pending_frame(Dav1dFrameContext *const f) { … }

static inline int merge_pending(const Dav1dContext *const c) { … }

static int create_filter_sbrow(Dav1dFrameContext *const f,
                               const int pass, Dav1dTask **res_t)
{ … }

int dav1d_task_create_tile_sbrow(Dav1dFrameContext *const f, const int pass,
                                 const int cond_signal)
{ … }

void dav1d_task_frame_init(Dav1dFrameContext *const f) { … }

void dav1d_task_delayed_fg(Dav1dContext *const c, Dav1dPicture *const out,
                           const Dav1dPicture *const in)
{ … }

static inline int ensure_progress(struct TaskThreadData *const ttd,
                                  Dav1dFrameContext *const f,
                                  Dav1dTask *const t, const enum TaskType type,
                                  atomic_int *const state, int *const target)
{ … }

static inline int check_tile(Dav1dTask *const t, Dav1dFrameContext *const f,
                             const int frame_mt)
{ … }

static inline int get_frame_progress(const Dav1dContext *const c,
                                     const Dav1dFrameContext *const f)
{ … }

static inline void abort_frame(Dav1dFrameContext *const f, const int error) { … }

static inline void delayed_fg_task(const Dav1dContext *const c,
                                   struct TaskThreadData *const ttd)
{ … }

void *dav1d_worker_task(void *data) { … }