2 * Copyright (c) 2008 Vitor Sessak
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * memory buffer source filter
27 #include "vsrc_buffer.h"
34 enum PixelFormat pix_fmt;
35 AVRational pixel_aspect;
36 } BufferSourceContext;
38 int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
39 int64_t pts, AVRational pixel_aspect)
41 BufferSourceContext *c = buffer_filter->priv;
44 av_log(buffer_filter, AV_LOG_ERROR,
45 "Buffering several frames is not supported. "
46 "Please consume all available frames before adding a new one.\n"
51 memcpy(c->frame.data , frame->data , sizeof(frame->data));
52 memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
53 c->frame.interlaced_frame= frame->interlaced_frame;
54 c->frame.top_field_first = frame->top_field_first;
56 c->pixel_aspect = pixel_aspect;
62 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
64 BufferSourceContext *c = ctx->priv;
66 if (args && sscanf(args, "%d:%d:%d", &c->w, &c->h, &c->pix_fmt) == 3)
69 av_log(ctx, AV_LOG_ERROR, "init() expected 3 arguments:'%s'\n", args);
73 static int query_formats(AVFilterContext *ctx)
75 BufferSourceContext *c = ctx->priv;
76 enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
78 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
82 static int config_props(AVFilterLink *link)
84 BufferSourceContext *c = link->src->priv;
92 static int request_frame(AVFilterLink *link)
94 BufferSourceContext *c = link->src->priv;
95 AVFilterPicRef *picref;
98 av_log(link->src, AV_LOG_ERROR,
99 "request_frame() called with no available frame!\n");
103 /* This picture will be needed unmodified later for decoding the next
105 picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
109 av_picture_copy((AVPicture *)&picref->data, (AVPicture *)&c->frame,
110 picref->pic->format, link->w, link->h);
112 picref->pts = c->pts;
113 picref->pixel_aspect = c->pixel_aspect;
114 picref->interlaced = c->frame.interlaced_frame;
115 picref->top_field_first = c->frame.top_field_first;
116 avfilter_start_frame(link, avfilter_ref_pic(picref, ~0));
117 avfilter_draw_slice(link, 0, link->h, 1);
118 avfilter_end_frame(link);
119 avfilter_unref_pic(picref);
126 static int poll_frame(AVFilterLink *link)
128 BufferSourceContext *c = link->src->priv;
129 return !!(c->has_frame);
132 AVFilter avfilter_vsrc_buffer = {
134 .description = NULL_IF_CONFIG_SMALL("Buffer video frames, and make them accessible to the filterchain."),
135 .priv_size = sizeof(BufferSourceContext),
136 .query_formats = query_formats,
140 .inputs = (AVFilterPad[]) {{ .name = NULL }},
141 .outputs = (AVFilterPad[]) {{ .name = "default",
142 .type = AVMEDIA_TYPE_VIDEO,
143 .request_frame = request_frame,
144 .poll_frame = poll_frame,
145 .config_props = config_props, },