avfilter/fifo: Remove (a)fifo filters

Obsolete since 4ca1fb9d2a91757c8c4c34dd456abf340e3f765f.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>

doc/filters.texi

@@ -14122,15 +14122,6 @@ For example:
 ffmpeg -i in.vob -vf "fieldorder=bff" out.dv
 @end example
 
-@section fifo, afifo
-
-Buffer input images and send them when they are requested.
-
-It is mainly useful when auto-inserted by the libavfilter
-framework.
-
-It does not take parameters.
-
 @section fillborders
 
 Fill borders of the input video, without changing video stream dimensions.

libavfilter/Makefile

@@ -16,7 +16,6 @@ OBJS = allfilters.o                                                     \
        colorspace.o                                                     \
        ccfifo.o                                                         \
        drawutils.o                                                      \
-       fifo.o                                                           \
        formats.o                                                        \
        framepool.o                                                      \
        framequeue.o                                                     \

libavfilter/allfilters.c

@@ -611,8 +611,6 @@ extern  const AVFilter ff_asrc_abuffer;
 extern  const AVFilter ff_vsrc_buffer;
 extern  const AVFilter ff_asink_abuffer;
 extern  const AVFilter ff_vsink_buffer;
-extern const AVFilter ff_af_afifo;
-extern const AVFilter ff_vf_fifo;
 
 #include "libavfilter/filter_list.c"
 

libavfilter/fifo.c

@@ -1,165 +0,0 @@
-/*
- * Copyright (c) 2007 Bobby Bingham
- *
- * This file is part of FFmpeg.
- *
- * FFmpeg is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2.1 of the License, or (at your option) any later version.
- *
- * FFmpeg is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-/**
- * @file
- * FIFO buffering filter
- */
-
-#include "libavutil/common.h"
-#include "libavutil/mathematics.h"
-
-#include "audio.h"
-#include "avfilter.h"
-#include "internal.h"
-
-typedef struct Buf {
-    AVFrame *frame;
-    struct Buf *next;
-} Buf;
-
-typedef struct FifoContext {
-    Buf  root;
-    Buf *last;   ///< last buffered frame
-
-    /**
-     * When a specific number of output samples is requested, the partial
-     * buffer is stored here
-     */
-    AVFrame *out;
-    int allocated_samples;      ///< number of samples out was allocated for
-} FifoContext;
-
-static av_cold int init(AVFilterContext *ctx)
-{
-    FifoContext *s = ctx->priv;
-    s->last = &s->root;
-
-    return 0;
-}
-
-static av_cold void uninit(AVFilterContext *ctx)
-{
-    FifoContext *s = ctx->priv;
-    Buf *buf, *tmp;
-
-    for (buf = s->root.next; buf; buf = tmp) {
-        tmp = buf->next;
-        av_frame_free(&buf->frame);
-        av_free(buf);
-    }
-
-    av_frame_free(&s->out);
-}
-
-static int add_to_queue(AVFilterLink *inlink, AVFrame *frame)
-{
-    FifoContext *s = inlink->dst->priv;
-
-    s->last->next = av_mallocz(sizeof(Buf));
-    if (!s->last->next) {
-        av_frame_free(&frame);
-        return AVERROR(ENOMEM);
-    }
-
-    s->last = s->last->next;
-    s->last->frame = frame;
-
-    return 0;
-}
-
-static void queue_pop(FifoContext *s)
-{
-    Buf *tmp = s->root.next->next;
-    if (s->last == s->root.next)
-        s->last = &s->root;
-    av_freep(&s->root.next);
-    s->root.next = tmp;
-}
-
-static int request_frame(AVFilterLink *outlink)
-{
-    FifoContext *s = outlink->src->priv;
-    int ret = 0;
-
-    if (!s->root.next) {
-        if ((ret = ff_request_frame(outlink->src->inputs[0])) < 0)
-            return ret;
-        if (!s->root.next)
-            return 0;
-    }
-    ret = ff_filter_frame(outlink, s->root.next->frame);
-    queue_pop(s);
-    return ret;
-}
-
-static const AVFilterPad avfilter_vf_fifo_inputs[] = {
-    {
-        .name         = "default",
-        .type         = AVMEDIA_TYPE_VIDEO,
-        .filter_frame = add_to_queue,
-    },
-};
-
-static const AVFilterPad avfilter_vf_fifo_outputs[] = {
-    {
-        .name          = "default",
-        .type          = AVMEDIA_TYPE_VIDEO,
-        .request_frame = request_frame,
-    },
-};
-
-const AVFilter ff_vf_fifo = {
-    .name        = "fifo",
-    .description = NULL_IF_CONFIG_SMALL("Buffer input images and send them when they are requested."),
-    .init        = init,
-    .uninit      = uninit,
-    .priv_size   = sizeof(FifoContext),
-    .flags       = AVFILTER_FLAG_METADATA_ONLY,
-    FILTER_INPUTS(avfilter_vf_fifo_inputs),
-    FILTER_OUTPUTS(avfilter_vf_fifo_outputs),
-};
-
-static const AVFilterPad avfilter_af_afifo_inputs[] = {
-    {
-        .name         = "default",
-        .type         = AVMEDIA_TYPE_AUDIO,
-        .filter_frame = add_to_queue,
-    },
-};
-
-static const AVFilterPad avfilter_af_afifo_outputs[] = {
-    {
-        .name          = "default",
-        .type          = AVMEDIA_TYPE_AUDIO,
-        .request_frame = request_frame,
-    },
-};
-
-const AVFilter ff_af_afifo = {
-    .name        = "afifo",
-    .description = NULL_IF_CONFIG_SMALL("Buffer input frames and send them when they are requested."),
-    .init        = init,
-    .uninit      = uninit,
-    .priv_size   = sizeof(FifoContext),
-    .flags       = AVFILTER_FLAG_METADATA_ONLY,
-    FILTER_INPUTS(avfilter_af_afifo_inputs),
-    FILTER_OUTPUTS(avfilter_af_afifo_outputs),
-};