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111 lines
3.7 KiB
111 lines
3.7 KiB
/* |
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* Copyright (c) Stefano Sabatini | stefasab at gmail.com |
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* Copyright (c) S.N. Hemanth Meenakshisundaram | smeenaks at ucsd.edu |
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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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#include "libavutil/avassert.h" |
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#include "libavutil/channel_layout.h" |
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#include "libavutil/common.h" |
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#include "libavutil/cpu.h" |
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#include "audio.h" |
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#include "avfilter.h" |
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#include "framepool.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 = NULL; |
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int channels = link->ch_layout.nb_channels; |
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#if FF_API_OLD_CHANNEL_LAYOUT |
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FF_DISABLE_DEPRECATION_WARNINGS |
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int channel_layout_nb_channels = av_get_channel_layout_nb_channels(link->channel_layout); |
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int align = av_cpu_max_align(); |
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av_assert0(channels == channel_layout_nb_channels || !channel_layout_nb_channels); |
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FF_ENABLE_DEPRECATION_WARNINGS |
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#endif |
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if (!link->frame_pool) { |
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link->frame_pool = ff_frame_pool_audio_init(av_buffer_allocz, channels, |
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nb_samples, link->format, align); |
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if (!link->frame_pool) |
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return NULL; |
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} else { |
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int pool_channels = 0; |
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int pool_nb_samples = 0; |
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int pool_align = 0; |
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enum AVSampleFormat pool_format = AV_SAMPLE_FMT_NONE; |
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if (ff_frame_pool_get_audio_config(link->frame_pool, |
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&pool_channels, &pool_nb_samples, |
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&pool_format, &pool_align) < 0) { |
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return NULL; |
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} |
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if (pool_channels != channels || pool_nb_samples < nb_samples || |
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pool_format != link->format || pool_align != align) { |
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ff_frame_pool_uninit((FFFramePool **)&link->frame_pool); |
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link->frame_pool = ff_frame_pool_audio_init(av_buffer_allocz, channels, |
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nb_samples, link->format, align); |
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if (!link->frame_pool) |
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return NULL; |
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} |
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} |
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frame = ff_frame_pool_get(link->frame_pool); |
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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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#if FF_API_OLD_CHANNEL_LAYOUT |
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FF_DISABLE_DEPRECATION_WARNINGS |
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frame->channel_layout = link->channel_layout; |
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FF_ENABLE_DEPRECATION_WARNINGS |
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#endif |
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if (link->ch_layout.order != AV_CHANNEL_ORDER_UNSPEC && |
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av_channel_layout_copy(&frame->ch_layout, &link->ch_layout) < 0) { |
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av_frame_free(&frame); |
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return NULL; |
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} |
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frame->sample_rate = link->sample_rate; |
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av_samples_set_silence(frame->extended_data, 0, nb_samples, channels, 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_buffer.audio) |
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ret = link->dstpad->get_buffer.audio(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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