| /* |
| * Copyright 2007 Bobby Bingham |
| * Copyright Stefano Sabatini <stefasab gmail com> |
| * Copyright Vitor Sessak <vitor1001 gmail com> |
| * |
| * 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 <string.h> |
| #include <stdio.h> |
| |
| #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 (!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); |
| |
| 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; |
| |
| 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; |
| } |