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https://github.com/FFmpeg/FFmpeg.git
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50ea7389ec
Lots of audio filters use very simple inputs or outputs: An array with a single AVFilterPad whose name is "default" and whose type is AVMEDIA_TYPE_AUDIO; everything else is unset. Given that we never use pointer equality for inputs or outputs*, we can simply use a single AVFilterPad instead of dozens; this even saves .data.rel.ro (4784B here) as well as relocations. *: In fact, several filters (like the filters in af_biquads.c) already use the same inputs; furthermore, ff_filter_alloc() duplicates the input and output pads so that we do not even work with the pads directly. Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/*
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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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#include "audio.h"
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#include "avfilter.h"
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#include "internal.h"
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static int filter_frame(AVFilterLink *inlink, AVFrame *in)
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{
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AVFilterLink *outlink = inlink->dst->outputs[0];
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AVFrame *out = ff_get_audio_buffer(outlink, in->nb_samples);
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int ret;
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if (!out) {
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ret = AVERROR(ENOMEM);
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goto fail;
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}
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ret = av_frame_copy_props(out, in);
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if (ret < 0)
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goto fail;
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ret = av_frame_copy(out, in);
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if (ret < 0)
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goto fail;
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av_frame_free(&in);
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return ff_filter_frame(outlink, out);
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fail:
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av_frame_free(&in);
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av_frame_free(&out);
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return ret;
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}
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static const AVFilterPad acopy_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 = filter_frame,
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},
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};
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const AVFilter ff_af_acopy = {
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.name = "acopy",
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.description = NULL_IF_CONFIG_SMALL("Copy the input audio unchanged to the output."),
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.flags = AVFILTER_FLAG_METADATA_ONLY,
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FILTER_INPUTS(acopy_inputs),
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FILTER_OUTPUTS(ff_audio_default_filterpad),
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};
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