From 8992cb1d0d07edc33d274f6d7924ecdf6f83d994 Mon Sep 17 00:00:00 2001 From: Tim Redfern Date: Thu, 5 Sep 2013 17:57:22 +0100 Subject: making act segmenter --- ffmpeg/libavfilter/video.c | 157 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 157 insertions(+) create mode 100644 ffmpeg/libavfilter/video.c (limited to 'ffmpeg/libavfilter/video.c') diff --git a/ffmpeg/libavfilter/video.c b/ffmpeg/libavfilter/video.c new file mode 100644 index 0000000..b274070 --- /dev/null +++ b/ffmpeg/libavfilter/video.c @@ -0,0 +1,157 @@ +/* + * Copyright 2007 Bobby Bingham + * Copyright Stefano Sabatini + * Copyright Vitor Sessak + * + * This file is part of FFmpeg. + * + * FFmpeg 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. + * + * FFmpeg 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 FFmpeg; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#include +#include + +#include "libavutil/avassert.h" +#include "libavutil/buffer.h" +#include "libavutil/imgutils.h" +#include "libavutil/mem.h" + +#include "avfilter.h" +#include "internal.h" +#include "video.h" + +AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h) +{ + return ff_get_video_buffer(link->dst->outputs[0], w, h); +} + +/* TODO: set the buffer's priv member to a context structure for the whole + * filter chain. This will allow for a buffer pool instead of the constant + * alloc & free cycle currently implemented. */ +AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h) +{ + AVFrame *frame = av_frame_alloc(); + int ret; + +#if 0 //POOL + AVFilterPool *pool = link->pool; + if (pool) { + for (i = 0; i < POOL_SIZE; i++) { + picref = pool->pic[i]; + if (picref && picref->buf->format == link->format && picref->buf->w == w && picref->buf->h == h) { + AVFilterBuffer *pic = picref->buf; + pool->pic[i] = NULL; + pool->count--; + av_assert0(!picref->video->qp_table); + picref->video->w = w; + picref->video->h = h; + picref->perms = full_perms; + picref->format = link->format; + pic->refcount = 1; + memcpy(picref->data, pic->data, sizeof(picref->data)); + memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize)); + pool->refcount++; + return picref; + } + } + } else { + pool = link->pool = av_mallocz(sizeof(AVFilterPool)); + pool->refcount = 1; + } +#endif + if (!frame) + return NULL; + + frame->width = w; + frame->height = h; + frame->format = link->format; + + ret = av_frame_get_buffer(frame, 32); + if (ret < 0) + av_frame_free(&frame); + +#if 0 //POOL + memset(data[0], 128, i); + + picref->buf->priv = pool; + picref->buf->free = NULL; + pool->refcount++; +#endif + + return frame; +} + +#if FF_API_AVFILTERBUFFER +AVFilterBufferRef * +avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms, + int w, int h, enum AVPixelFormat format) +{ + AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer)); + AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef)); + + if (!pic || !picref) + goto fail; + + picref->buf = pic; + picref->buf->free = ff_avfilter_default_free_buffer; + if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps)))) + goto fail; + + pic->w = picref->video->w = w; + pic->h = picref->video->h = h; + + /* make sure the buffer gets read permission or it's useless for output */ + picref->perms = perms | AV_PERM_READ; + + pic->refcount = 1; + picref->type = AVMEDIA_TYPE_VIDEO; + pic->format = picref->format = format; + + memcpy(pic->data, data, 4*sizeof(data[0])); + memcpy(pic->linesize, linesize, 4*sizeof(linesize[0])); + memcpy(picref->data, pic->data, sizeof(picref->data)); + memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize)); + + pic-> extended_data = pic->data; + picref->extended_data = picref->data; + + picref->pts = AV_NOPTS_VALUE; + + return picref; + +fail: + if (picref && picref->video) + av_free(picref->video); + av_free(picref); + av_free(pic); + return NULL; +} +#endif + +AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h) +{ + AVFrame *ret = NULL; + + av_unused char buf[16]; + FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0); + + if (link->dstpad->get_video_buffer) + ret = link->dstpad->get_video_buffer(link, w, h); + + if (!ret) + ret = ff_default_get_video_buffer(link, w, h); + + return ret; +} -- cgit v1.2.3