GCC Code Coverage Report
Directory: ../../../ffmpeg/ Exec Total Coverage
File: src/libavfilter/fifo.c Lines: 0 37 0.0 %
Date: 2020-10-23 17:01:47 Branches: 0 12 0.0 %

Line Branch Exec Source
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/*
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 * Copyright (c) 2007 Bobby Bingham
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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/**
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 * @file
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 * FIFO buffering filter
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 */
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#include "libavutil/common.h"
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#include "libavutil/mathematics.h"
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#include "audio.h"
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#include "avfilter.h"
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#include "internal.h"
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typedef struct Buf {
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    AVFrame *frame;
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    struct Buf *next;
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} Buf;
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typedef struct FifoContext {
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    Buf  root;
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    Buf *last;   ///< last buffered frame
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    /**
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     * When a specific number of output samples is requested, the partial
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     * buffer is stored here
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     */
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    AVFrame *out;
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    int allocated_samples;      ///< number of samples out was allocated for
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} FifoContext;
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static av_cold int init(AVFilterContext *ctx)
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{
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    FifoContext *s = ctx->priv;
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    s->last = &s->root;
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    return 0;
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}
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static av_cold void uninit(AVFilterContext *ctx)
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{
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    FifoContext *s = ctx->priv;
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    Buf *buf, *tmp;
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    for (buf = s->root.next; buf; buf = tmp) {
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        tmp = buf->next;
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        av_frame_free(&buf->frame);
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        av_free(buf);
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    }
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    av_frame_free(&s->out);
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}
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static int add_to_queue(AVFilterLink *inlink, AVFrame *frame)
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{
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    FifoContext *s = inlink->dst->priv;
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    s->last->next = av_mallocz(sizeof(Buf));
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    if (!s->last->next) {
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        av_frame_free(&frame);
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        return AVERROR(ENOMEM);
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    }
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    s->last = s->last->next;
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    s->last->frame = frame;
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    return 0;
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}
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static void queue_pop(FifoContext *s)
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{
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    Buf *tmp = s->root.next->next;
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    if (s->last == s->root.next)
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        s->last = &s->root;
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    av_freep(&s->root.next);
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    s->root.next = tmp;
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}
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static int request_frame(AVFilterLink *outlink)
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{
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    FifoContext *s = outlink->src->priv;
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    int ret = 0;
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    if (!s->root.next) {
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        if ((ret = ff_request_frame(outlink->src->inputs[0])) < 0)
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            return ret;
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        if (!s->root.next)
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            return 0;
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    }
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    ret = ff_filter_frame(outlink, s->root.next->frame);
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    queue_pop(s);
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    return ret;
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}
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static const AVFilterPad avfilter_vf_fifo_inputs[] = {
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    {
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        .name         = "default",
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        .type         = AVMEDIA_TYPE_VIDEO,
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        .filter_frame = add_to_queue,
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    },
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    { NULL }
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};
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static const AVFilterPad avfilter_vf_fifo_outputs[] = {
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    {
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        .name          = "default",
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        .type          = AVMEDIA_TYPE_VIDEO,
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        .request_frame = request_frame,
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    },
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    { NULL }
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};
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AVFilter ff_vf_fifo = {
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    .name        = "fifo",
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    .description = NULL_IF_CONFIG_SMALL("Buffer input images and send them when they are requested."),
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    .init        = init,
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    .uninit      = uninit,
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    .priv_size   = sizeof(FifoContext),
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    .inputs      = avfilter_vf_fifo_inputs,
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    .outputs     = avfilter_vf_fifo_outputs,
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};
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static const AVFilterPad avfilter_af_afifo_inputs[] = {
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    {
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        .name         = "default",
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        .type         = AVMEDIA_TYPE_AUDIO,
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        .filter_frame = add_to_queue,
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    },
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    { NULL }
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};
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static const AVFilterPad avfilter_af_afifo_outputs[] = {
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    {
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        .name          = "default",
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        .type          = AVMEDIA_TYPE_AUDIO,
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        .request_frame = request_frame,
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    },
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    { NULL }
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};
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AVFilter ff_af_afifo = {
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    .name        = "afifo",
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    .description = NULL_IF_CONFIG_SMALL("Buffer input frames and send them when they are requested."),
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    .init        = init,
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    .uninit      = uninit,
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    .priv_size   = sizeof(FifoContext),
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    .inputs      = avfilter_af_afifo_inputs,
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    .outputs     = avfilter_af_afifo_outputs,
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};