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68 lines
2.0 KiB
68 lines
2.0 KiB
/* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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 "libavutil/channel_layout.h" |
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#include "libavutil/common.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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AVFrame *ff_null_get_audio_buffer(AVFilterLink *link, int nb_samples) |
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{ |
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return ff_get_audio_buffer(link->dst->outputs[0], nb_samples); |
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} |
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AVFrame *ff_default_get_audio_buffer(AVFilterLink *link, int nb_samples) |
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{ |
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AVFrame *frame = av_frame_alloc(); |
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int channels = av_get_channel_layout_nb_channels(link->channel_layout); |
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int ret; |
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if (!frame) |
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return NULL; |
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frame->nb_samples = nb_samples; |
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frame->format = link->format; |
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frame->channel_layout = link->channel_layout; |
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frame->sample_rate = link->sample_rate; |
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ret = av_frame_get_buffer(frame, 0); |
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if (ret < 0) { |
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av_frame_free(&frame); |
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return NULL; |
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} |
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av_samples_set_silence(frame->extended_data, 0, nb_samples, channels, |
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link->format); |
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return frame; |
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} |
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AVFrame *ff_get_audio_buffer(AVFilterLink *link, int nb_samples) |
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{ |
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AVFrame *ret = NULL; |
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if (link->dstpad->get_audio_buffer) |
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ret = link->dstpad->get_audio_buffer(link, nb_samples); |
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if (!ret) |
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ret = ff_default_get_audio_buffer(link, nb_samples); |
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return ret; |
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}
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