2 * Copyright (c) Stefano Sabatini | stefasab at gmail.com
3 * Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/avassert.h"
23 #include "libavutil/channel_layout.h"
24 #include "libavutil/common.h"
25 #include "libavcodec/avcodec.h"
31 AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples)
33 return ff_get_audio_buffer(link->dst->outputs[0], nb_samples);
36 AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples)
38 AVFrame *frame = av_frame_alloc();
39 int channels = link->channels;
42 av_assert0(channels == av_get_channel_layout_nb_channels(link->channel_layout) || !av_get_channel_layout_nb_channels(link->channel_layout));
47 frame->nb_samples = nb_samples;
48 frame->format = link->format;
49 av_frame_set_channels(frame, link->channels);
50 frame->channel_layout = link->channel_layout;
51 frame->sample_rate = link->sample_rate;
52 ret = av_frame_get_buffer(frame, 0);
54 av_frame_free(&frame);
58 av_samples_set_silence(frame->extended_data, 0, nb_samples, channels,
65 AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples)
69 if (link->dstpad->get_audio_buffer)
70 ret = link->dstpad->get_audio_buffer(link, nb_samples);
73 ret = ff_default_get_audio_buffer(link, nb_samples);