| 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 | |
| 35 | AVFrame *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. */ |
| 43 | AVFrame *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 |
| 63 | AVFilterBufferRef * |
| 64 | avfilter_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 | |
| 100 | fail: |
| 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 | |
| 109 | AVFrame *ff_get_video_buffer(AVFilterLink *link, int w, int h) |
| 110 | { |
| 111 | AVFrame *ret = NULL; |
| 112 | |
| 113 | FF_TPRINTF_START(NULL, get_video_buffer); ff_tlog_link(NULL, link, 0); |
| 114 | |
| 115 | if (link->dstpad->get_video_buffer) |
| 116 | ret = link->dstpad->get_video_buffer(link, w, h); |
| 117 | |
| 118 | if (!ret) |
| 119 | ret = ff_default_get_video_buffer(link, w, h); |
| 120 | |
| 121 | return ret; |
| 122 | } |