From 4a1ac8c43fcf526b249c3409f1ba54755143a224 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Thu, 10 May 2012 07:58:11 +0200 Subject: lavfi: move buffer management function to a separate file. --- libavfilter/buffer.c | 168 +++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 168 insertions(+) create mode 100644 libavfilter/buffer.c (limited to 'libavfilter/buffer.c') diff --git a/libavfilter/buffer.c b/libavfilter/buffer.c new file mode 100644 index 0000000000..be0da26ea1 --- /dev/null +++ b/libavfilter/buffer.c @@ -0,0 +1,168 @@ +/* + * This file is part of Libav. + * + * Libav is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 of the License, or (at your option) any later version. + * + * Libav is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public + * License along with Libav; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include "libavutil/audioconvert.h" +#include "libavcodec/avcodec.h" + +#include "avfilter.h" +#include "internal.h" + +/* TODO: buffer pool. see comment for avfilter_default_get_video_buffer() */ +void ff_avfilter_default_free_buffer(AVFilterBuffer *ptr) +{ + if (ptr->extended_data != ptr->data) + av_freep(&ptr->extended_data); + av_free(ptr->data[0]); + av_free(ptr); +} + +AVFilterBufferRef *avfilter_ref_buffer(AVFilterBufferRef *ref, int pmask) +{ + AVFilterBufferRef *ret = av_malloc(sizeof(AVFilterBufferRef)); + if (!ret) + return NULL; + *ret = *ref; + if (ref->type == AVMEDIA_TYPE_VIDEO) { + ret->video = av_malloc(sizeof(AVFilterBufferRefVideoProps)); + if (!ret->video) { + av_free(ret); + return NULL; + } + *ret->video = *ref->video; + ret->extended_data = ret->data; + } else if (ref->type == AVMEDIA_TYPE_AUDIO) { + ret->audio = av_malloc(sizeof(AVFilterBufferRefAudioProps)); + if (!ret->audio) { + av_free(ret); + return NULL; + } + *ret->audio = *ref->audio; + + if (ref->extended_data != ref->data) { + int nb_channels = av_get_channel_layout_nb_channels(ref->audio->channel_layout); + if (!(ret->extended_data = av_malloc(sizeof(*ret->extended_data) * + nb_channels))) { + av_freep(&ret->audio); + av_freep(&ret); + return NULL; + } + memcpy(ret->extended_data, ref->extended_data, + sizeof(*ret->extended_data) * nb_channels); + } else + ret->extended_data = ret->data; + } + ret->perms &= pmask; + ret->buf->refcount ++; + return ret; +} + +void avfilter_unref_buffer(AVFilterBufferRef *ref) +{ + if (!ref) + return; + if (!(--ref->buf->refcount)) + ref->buf->free(ref->buf); + if (ref->extended_data != ref->data) + av_freep(&ref->extended_data); + av_free(ref->video); + av_free(ref->audio); + av_free(ref); +} + +int avfilter_copy_frame_props(AVFilterBufferRef *dst, const AVFrame *src) +{ + dst->pts = src->pts; + dst->format = src->format; + + switch (dst->type) { + case AVMEDIA_TYPE_VIDEO: + dst->video->w = src->width; + dst->video->h = src->height; + dst->video->pixel_aspect = src->sample_aspect_ratio; + dst->video->interlaced = src->interlaced_frame; + dst->video->top_field_first = src->top_field_first; + dst->video->key_frame = src->key_frame; + dst->video->pict_type = src->pict_type; + break; + case AVMEDIA_TYPE_AUDIO: + dst->audio->sample_rate = src->sample_rate; + dst->audio->channel_layout = src->channel_layout; + break; + default: + return AVERROR(EINVAL); + } + + return 0; +} + +int avfilter_copy_buf_props(AVFrame *dst, const AVFilterBufferRef *src) +{ + int planes, nb_channels; + + memcpy(dst->data, src->data, sizeof(dst->data)); + memcpy(dst->linesize, src->linesize, sizeof(dst->linesize)); + + dst->pts = src->pts; + dst->format = src->format; + + switch (src->type) { + case AVMEDIA_TYPE_VIDEO: + dst->width = src->video->w; + dst->height = src->video->h; + dst->sample_aspect_ratio = src->video->pixel_aspect; + dst->interlaced_frame = src->video->interlaced; + dst->top_field_first = src->video->top_field_first; + dst->key_frame = src->video->key_frame; + dst->pict_type = src->video->pict_type; + break; + case AVMEDIA_TYPE_AUDIO: + nb_channels = av_get_channel_layout_nb_channels(src->audio->channel_layout); + planes = av_sample_fmt_is_planar(src->format) ? nb_channels : 1; + + if (planes > FF_ARRAY_ELEMS(dst->data)) { + dst->extended_data = av_mallocz(planes * sizeof(*dst->extended_data)); + if (!dst->extended_data) + return AVERROR(ENOMEM); + memcpy(dst->extended_data, src->extended_data, + planes * sizeof(dst->extended_data)); + } else + dst->extended_data = dst->data; + + dst->sample_rate = src->audio->sample_rate; + dst->channel_layout = src->audio->channel_layout; + dst->nb_samples = src->audio->nb_samples; + break; + default: + return AVERROR(EINVAL); + } + + return 0; +} + +void avfilter_copy_buffer_ref_props(AVFilterBufferRef *dst, AVFilterBufferRef *src) +{ + // copy common properties + dst->pts = src->pts; + dst->pos = src->pos; + + switch (src->type) { + case AVMEDIA_TYPE_VIDEO: *dst->video = *src->video; break; + case AVMEDIA_TYPE_AUDIO: *dst->audio = *src->audio; break; + default: break; + } +} -- cgit v1.2.3