2 * Memory buffer source filter
3 * Copyright (c) 2008 Vitor Sessak
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 #include "vsrc_buffer.h"
30 enum PixelFormat pix_fmt;
31 AVRational pixel_aspect;
32 } BufferSourceContext;
35 int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
36 int64_t pts, AVRational pixel_aspect)
38 BufferSourceContext *c = buffer_filter->priv;
41 av_log(buffer_filter, AV_LOG_ERROR,
42 "Buffering several frames is not supported. "
43 "Please consume all available frames before adding a new one.\n"
48 memcpy(c->frame.data , frame->data , sizeof(frame->data));
49 memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
50 c->frame.interlaced_frame= frame->interlaced_frame;
51 c->frame.top_field_first = frame->top_field_first;
53 c->pixel_aspect = pixel_aspect;
59 static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
61 BufferSourceContext *c = ctx->priv;
63 if(args && sscanf(args, "%d:%d:%d", &c->w, &c->h, &c->pix_fmt) == 3)
66 av_log(ctx, AV_LOG_ERROR, "init() expected 3 arguments:'%s'\n", args);
70 static int query_formats(AVFilterContext *ctx)
72 BufferSourceContext *c = ctx->priv;
73 enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
75 avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
79 static int config_props(AVFilterLink *link)
81 BufferSourceContext *c = link->src->priv;
90 static int request_frame(AVFilterLink *link)
92 BufferSourceContext *c = link->src->priv;
93 AVFilterPicRef *picref;
96 av_log(link->src, AV_LOG_ERROR,
97 "request_frame() called with no available frame!\n");
101 /* This picture will be needed unmodified later for decoding the next
103 picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
107 av_picture_copy((AVPicture *)&picref->data, (AVPicture *)&c->frame,
108 picref->pic->format, link->w, link->h);
110 picref->pts = c->pts;
111 picref->pixel_aspect = c->pixel_aspect;
112 picref->interlaced = c->frame.interlaced_frame;
113 picref->top_field_first = c->frame.top_field_first;
114 avfilter_start_frame(link, avfilter_ref_pic(picref, ~0));
115 avfilter_draw_slice(link, 0, link->h, 1);
116 avfilter_end_frame(link);
117 avfilter_unref_pic(picref);
124 static int poll_frame(AVFilterLink *link)
126 BufferSourceContext *c = link->src->priv;
127 return !!(c->has_frame);
130 AVFilter avfilter_vsrc_buffer =
133 .priv_size = sizeof(BufferSourceContext),
134 .query_formats = query_formats,
138 .inputs = (AVFilterPad[]) {{ .name = NULL }},
139 .outputs = (AVFilterPad[]) {{ .name = "default",
140 .type = AVMEDIA_TYPE_VIDEO,
141 .request_frame = request_frame,
142 .poll_frame = poll_frame,
143 .config_props = config_props, },