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;
39 int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
40 int64_t pts, AVRational pixel_aspect)
42 BufferSourceContext *c = buffer_filter->priv;
45 av_log(buffer_filter, AV_LOG_ERROR,
46 "Buffering several frames is not supported. "
47 "Please consume all available frames before adding a new one.\n"
52 memcpy(c->frame.data , frame->data , sizeof(frame->data));
53 memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
54 c->frame.interlaced_frame= frame->interlaced_frame;
55 c->frame.top_field_first = frame->top_field_first;
57 c->pixel_aspect = pixel_aspect;
63 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
65 BufferSourceContext *c = ctx->priv;
67 if(args && sscanf(args, "%d:%d:%d", &c->w, &c->h, &c->pix_fmt) == 3)
70 av_log(ctx, AV_LOG_ERROR, "init() expected 3 arguments:'%s'\n", args);
74 static int query_formats(AVFilterContext *ctx)
76 BufferSourceContext *c = ctx->priv;
77 enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
79 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
83 static int config_props(AVFilterLink *link)
85 BufferSourceContext *c = link->src->priv;
94 static int request_frame(AVFilterLink *link)
96 BufferSourceContext *c = link->src->priv;
97 AVFilterPicRef *picref;
100 av_log(link->src, AV_LOG_ERROR,
101 "request_frame() called with no available frame!\n");
105 /* This picture will be needed unmodified later for decoding the next
107 picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
111 av_picture_copy((AVPicture *)&picref->data, (AVPicture *)&c->frame,
112 picref->pic->format, link->w, link->h);
114 picref->pts = c->pts;
115 picref->pixel_aspect = c->pixel_aspect;
116 picref->interlaced = c->frame.interlaced_frame;
117 picref->top_field_first = c->frame.top_field_first;
118 avfilter_start_frame(link, avfilter_ref_pic(picref, ~0));
119 avfilter_draw_slice(link, 0, link->h, 1);
120 avfilter_end_frame(link);
121 avfilter_unref_pic(picref);
128 static int poll_frame(AVFilterLink *link)
130 BufferSourceContext *c = link->src->priv;
131 return !!(c->has_frame);
134 AVFilter avfilter_vsrc_buffer =
137 .priv_size = sizeof(BufferSourceContext),
138 .query_formats = query_formats,
142 .inputs = (AVFilterPad[]) {{ .name = NULL }},
143 .outputs = (AVFilterPad[]) {{ .name = "default",
144 .type = AVMEDIA_TYPE_VIDEO,
145 .request_frame = request_frame,
146 .poll_frame = poll_frame,
147 .config_props = config_props, },