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https://git.videolan.org/git/ffmpeg.git
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df4c7ae9db
This is required for the pending lavfi indev extension, also consistent with the video buffer sink.
98 lines
3.1 KiB
C
98 lines
3.1 KiB
C
/*
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* Copyright (c) 2011 Stefano Sabatini
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* Copyright (c) 2011 Mina Nagy Zaki
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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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* audio buffer sink
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*/
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#include "avfilter.h"
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#include "asink_abuffer.h"
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static void filter_samples(AVFilterLink *link, AVFilterBufferRef *samplesref)
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{
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}
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static int init(AVFilterContext *ctx, const char *args, void *opaque)
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{
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if (!opaque) {
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av_log(ctx, AV_LOG_ERROR, "Opaque field required, please pass"
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" an initialized ABufferSinkContext");
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return AVERROR(EINVAL);
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}
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memcpy(ctx->priv, opaque, sizeof(ABufferSinkContext));
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return 0;
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}
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static int query_formats(AVFilterContext *ctx)
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{
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ABufferSinkContext *abuffersink = ctx->priv;
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AVFilterFormats *formats = NULL;
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if (!(formats = avfilter_make_format_list(abuffersink->sample_fmts)))
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return AVERROR(ENOMEM);
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avfilter_set_common_sample_formats(ctx, formats);
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if (!(formats = avfilter_make_format64_list(abuffersink->channel_layouts)))
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return AVERROR(ENOMEM);
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avfilter_set_common_channel_layouts(ctx, formats);
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if (!(formats = avfilter_make_format_list(abuffersink->packing_fmts)))
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return AVERROR(ENOMEM);
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avfilter_set_common_packing_formats(ctx, formats);
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return 0;
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}
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int av_asink_abuffer_get_audio_buffer_ref(AVFilterContext *abuffersink,
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AVFilterBufferRef **samplesref,
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int av_unused flags)
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{
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int ret;
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AVFilterLink * const inlink = abuffersink->inputs[0];
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if ((ret = avfilter_request_frame(inlink)))
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return ret;
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if (!inlink->cur_buf)
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return AVERROR(EINVAL);
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*samplesref = inlink->cur_buf;
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inlink->cur_buf = NULL;
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return 0;
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}
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AVFilter avfilter_asink_abuffersink = {
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.name = "abuffersink",
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.description = NULL_IF_CONFIG_SMALL("Buffer audio frames, and make them available to the end of the filter graph."),
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.init = init,
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.priv_size = sizeof(ABufferSinkContext),
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.query_formats = query_formats,
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.inputs = (AVFilterPad[]) {{ .name = "default",
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.type = AVMEDIA_TYPE_AUDIO,
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.filter_samples = filter_samples,
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.min_perms = AV_PERM_READ, },
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{ .name = NULL }},
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.outputs = (AVFilterPad[]) {{ .name = NULL }},
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};
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