1/* 2 * Copyright 2007 Bobby Bingham 3 * Copyright Stefano Sabatini <stefasab gmail com> 4 * Copyright Vitor Sessak <vitor1001 gmail com> 5 * 6 * This file is part of FFmpeg. 7 * 8 * FFmpeg is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU Lesser General Public 10 * License as published by the Free Software Foundation; either 11 * version 2.1 of the License, or (at your option) any later version. 12 * 13 * FFmpeg is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 * Lesser General Public License for more details. 17 * 18 * You should have received a copy of the GNU Lesser General Public 19 * License along with FFmpeg; if not, write to the Free Software 20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 21 */ 22 23#include <string.h> 24#include <stdio.h> 25 26#include "libavutil/avassert.h" 27#include "libavutil/buffer.h" 28#include "libavutil/imgutils.h" 29#include "libavutil/mem.h" 30 31#include "avfilter.h" 32#include "internal.h" 33#include "video.h" 34 35AVFrame *ff_null_get_video_buffer(AVFilterLink *link, int w, int h) 36{ 37 return ff_get_video_buffer(link->dst->outputs[0], w, h); 38} 39 40/* TODO: set the buffer's priv member to a context structure for the whole 41 * filter chain. This will allow for a buffer pool instead of the constant 42 * alloc & free cycle currently implemented. */ 43AVFrame *ff_default_get_video_buffer(AVFilterLink *link, int w, int h) 44{ 45 AVFrame *frame = av_frame_alloc(); 46 int ret; 47 48 if (!frame) 49 return NULL; 50 51 frame->width = w; 52 frame->height = h; 53 frame->format = link->format; 54 55 ret = av_frame_get_buffer(frame, 32); 56 if (ret < 0) 57 av_frame_free(&frame); 58 59 return frame; 60} 61 62#if FF_API_AVFILTERBUFFER 63AVFilterBufferRef * 64avfilter_get_video_buffer_ref_from_arrays(uint8_t * const data[4], const int linesize[4], int perms, 65 int w, int h, enum AVPixelFormat format) 66{ 67 AVFilterBuffer *pic = av_mallocz(sizeof(AVFilterBuffer)); 68 AVFilterBufferRef *picref = av_mallocz(sizeof(AVFilterBufferRef)); 69 70 if (!pic || !picref) 71 goto fail; 72 73 picref->buf = pic; 74 picref->buf->free = ff_avfilter_default_free_buffer; 75 if (!(picref->video = av_mallocz(sizeof(AVFilterBufferRefVideoProps)))) 76 goto fail; 77 78 pic->w = picref->video->w = w; 79 pic->h = picref->video->h = h; 80 81 /* make sure the buffer gets read permission or it's useless for output */ 82 picref->perms = perms | AV_PERM_READ; 83 84 pic->refcount = 1; 85 picref->type = AVMEDIA_TYPE_VIDEO; 86 pic->format = picref->format = format; 87 88 memcpy(pic->data, data, 4*sizeof(data[0])); 89 memcpy(pic->linesize, linesize, 4*sizeof(linesize[0])); 90 memcpy(picref->data, pic->data, sizeof(picref->data)); 91 memcpy(picref->linesize, pic->linesize, sizeof(picref->linesize)); 92 93 pic-> extended_data = pic->data; 94 picref->extended_data = picref->data; 95 96 picref->pts = AV_NOPTS_VALUE; 97 98 return picref; 99 100fail: 101 if (picref && picref->video) 102 av_free(picref->video); 103 av_free(picref); 104 av_free(pic); 105 return NULL; 106} 107#endif 108 109AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h) 110{ 111 AVFrame *ret = NULL; 112 113 av_unused char buf[16]; 114 FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0); 115 116 if (link->dstpad->get_video_buffer) 117 ret = link->dstpad->get_video_buffer(link, w, h); 118 119 if (!ret) 120 ret = ff_default_get_video_buffer(link, w, h); 121 122 return ret; 123} 124