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* This file is part of Libav.
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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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* 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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* 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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#include "libavutil/channel_layout.h"
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#include "libavutil/common.h"
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#include "libavcodec/avcodec.h"
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/* TODO: buffer pool. see comment for avfilter_default_get_video_buffer() */
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void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr)
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if (ptr->extended_data != ptr->data)
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av_freep(&ptr->extended_data);
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av_free(ptr->data[0]);
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AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask)
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AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef));
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if (ref->type == AVMEDIA_TYPE_VIDEO) {
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ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps));
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*ret->video = *ref->video;
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ret->extended_data = ret->data;
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} else if (ref->type == AVMEDIA_TYPE_AUDIO) {
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ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps));
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*ret->audio = *ref->audio;
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if (ref->extended_data != ref->data) {
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int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout);
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if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) *
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av_freep(&ret->audio);
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memcpy(ret->extended_data, ref->extended_data,
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sizeof(*ret->extended_data) * nb_channels);
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ret->extended_data = ret->data;
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ret->buf->refcount ++;
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void avfilter_unref_buffer(AVFilterBufferRef *ref)
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if (!(--ref->buf->refcount))
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ref->buf->free(ref->buf);
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if (ref->extended_data != ref->data)
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av_freep(&ref->extended_data);
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void avfilter_unref_bufferp(AVFilterBufferRef **ref)
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avfilter_unref_buffer(*ref);
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int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src)
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dst->format = src->format;
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case AVMEDIA_TYPE_VIDEO:
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dst->video->w = src->width;
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dst->video->h = src->height;
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dst->video->pixel_aspect = src->sample_aspect_ratio;
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dst->video->interlaced = src->interlaced_frame;
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dst->video->top_field_first = src->top_field_first;
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dst->video->key_frame = src->key_frame;
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dst->video->pict_type = src->pict_type;
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case AVMEDIA_TYPE_AUDIO:
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dst->audio->sample_rate = src->sample_rate;
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dst->audio->channel_layout = src->channel_layout;
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return AVERROR(EINVAL);
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int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src)
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int planes, nb_channels;
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memcpy(dst->data, src->data, sizeof(dst->data));
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memcpy(dst->linesize, src->linesize, sizeof(dst->linesize));
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dst->format = src->format;
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case AVMEDIA_TYPE_VIDEO:
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dst->width = src->video->w;
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dst->height = src->video->h;
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dst->sample_aspect_ratio = src->video->pixel_aspect;
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dst->interlaced_frame = src->video->interlaced;
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dst->top_field_first = src->video->top_field_first;
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dst->key_frame = src->video->key_frame;
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dst->pict_type = src->video->pict_type;
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case AVMEDIA_TYPE_AUDIO:
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nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout);
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planes = av_sample_fmt_is_planar(src->format) ? nb_channels : 1;
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if (planes > FF_ARRAY_ELEMS(dst->data)) {
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dst->extended_data = av_mallocz(planes * sizeof(*dst->extended_data));
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if (!dst->extended_data)
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return AVERROR(ENOMEM);
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memcpy(dst->extended_data, src->extended_data,
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planes * sizeof(*dst->extended_data));
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dst->extended_data = dst->data;
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dst->sample_rate = src->audio->sample_rate;
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dst->channel_layout = src->audio->channel_layout;
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dst->nb_samples = src->audio->nb_samples;
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return AVERROR(EINVAL);
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void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src)
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// copy common properties
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case AVMEDIA_TYPE_VIDEO: *dst->video = *src->video; break;
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case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break;