1. ffmpeg
  2. Commit cf13f204ccea9c4ce8a0e9d27e2e507dc0cb8842
Browse code

Add "Memory buffer source filter" from SOC. This is needed by the current SOC-ffmpeg.c code.

Originally committed as revision 23039 to svn://svn.ffmpeg.org/ffmpeg/trunk

Michael Niedermayer authored on 2010/05/07 10:25:00
Showing 2 changed files
libavfilter/vsrc_buffer.c
History View file @ cf13f20
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+/*
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+ * Memory buffer source filter
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+ * Copyright (c) 2008 Vitor Sessak
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+ *
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+ * This file is part of FFmpeg.
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+ *
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+ * FFmpeg is free software; you can redistribute it and/or
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+ * modify it under the terms of the GNU Lesser General Public
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+ * License as published by the Free Software Foundation; either
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+ * version 2.1 of the License, or (at your option) any later version.
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+ *
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+ * FFmpeg is distributed in the hope that it will be useful,
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+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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+ * Lesser General Public License for more details.
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+ *
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+ * You should have received a copy of the GNU Lesser General Public
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+ * License along with FFmpeg; if not, write to the Free Software
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+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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+ */
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+
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+#include "avfilter.h"
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+#include "vsrc_buffer.h"
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+
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+typedef struct {
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+    int64_t           pts;
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+    AVFrame           frame;
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+    int               has_frame;
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+    int               h, w, pix_fmt;
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+    AVRational        pixel_aspect;
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+} BufferSourceContext;
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+
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+
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+int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
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+                             int64_t pts, AVRational pixel_aspect)
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+{
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+    BufferSourceContext *c = buffer_filter->priv;
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+
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+    if (c->has_frame) {
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+        av_log(buffer_filter, AV_LOG_ERROR,
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+               "Buffering several frames is not supported. "
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+               "Please consume all available frames before adding a new one.\n"
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+            );
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+        //return -1;
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+    }
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+
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+    memcpy(c->frame.data    , frame->data    , sizeof(frame->data));
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+    memcpy(c->frame.linesize, frame->linesize, sizeof(frame->linesize));
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+    c->pts = pts;
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+    c->pixel_aspect = pixel_aspect;
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+    c->has_frame = 1;
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+
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+    return 0;
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+}
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+
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+static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
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+{
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+    BufferSourceContext *c = ctx->priv;
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+
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+    if(args && sscanf(args, "%d:%d:%d", &c->w, &c->h, &c->pix_fmt) == 3)
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+        return 0;
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+
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+    av_log(ctx, AV_LOG_ERROR, "init() expected 3 arguments:'%s'\n", args);
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+    return -1;
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+}
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+
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+static int query_formats(AVFilterContext *ctx)
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+{
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+    BufferSourceContext *c = ctx->priv;
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+    enum PixelFormat pix_fmts[] = { c->pix_fmt, PIX_FMT_NONE };
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+
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+    avfilter_set_common_formats(ctx, avfilter_make_format_list(pix_fmts));
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+    return 0;
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+}
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+
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+static int config_props(AVFilterLink *link)
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+{
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+    BufferSourceContext *c = link->src->priv;
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+
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+    link->w = c->w;
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+    link->h = c->h;
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+
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+    return 0;
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+}
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+
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+
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+static int request_frame(AVFilterLink *link)
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+{
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+    BufferSourceContext *c = link->src->priv;
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+    AVFilterPicRef *picref;
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+
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+    if (!c->has_frame) {
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+        av_log(link->src, AV_LOG_ERROR,
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+               "request_frame() called with no available frame!\n");
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+        //return -1;
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+    }
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+
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+    /* This picture will be needed unmodified later for decoding the next
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+     * frame */
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+    picref = avfilter_get_video_buffer(link, AV_PERM_WRITE | AV_PERM_PRESERVE |
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+                                       AV_PERM_REUSE2,
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+                                       link->w, link->h);
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+
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+    av_picture_copy((AVPicture *)&picref->data, (AVPicture *)&c->frame,
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+                    picref->pic->format, link->w, link->h);
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+
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+    picref->pts = c->pts;
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+    picref->pixel_aspect = c->pixel_aspect;
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+    avfilter_start_frame(link, avfilter_ref_pic(picref, ~0));
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+    avfilter_draw_slice(link, 0, link->h, 1);
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+    avfilter_end_frame(link);
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+    avfilter_unref_pic(picref);
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+
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+    c->has_frame = 0;
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+
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+    return 0;
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+}
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+
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+static int poll_frame(AVFilterLink *link)
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+{
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+    BufferSourceContext *c = link->src->priv;
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+    return !!(c->has_frame);
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+}
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+
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+AVFilter avfilter_vsrc_buffer =
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+{
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+    .name      = "buffer",
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+    .priv_size = sizeof(BufferSourceContext),
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+    .query_formats = query_formats,
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+
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+    .init      = init,
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+
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+    .inputs    = (AVFilterPad[]) {{ .name = NULL }},
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+    .outputs   = (AVFilterPad[]) {{ .name            = "default",
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+                                    .type            = AVMEDIA_TYPE_VIDEO,
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+                                    .request_frame   = request_frame,
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+                                    .poll_frame      = poll_frame,
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+                                    .config_props    = config_props, },
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+                                  { .name = NULL}},
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+};
libavfilter/vsrc_buffer.h
History View file @ cf13f20
0 140 
new file mode 100644
... ... 
@@ -0,0 +1,24 @@
0 
+/*
1 
+ * Memory buffer source filter
2 
+ * Copyright (c) 2008 Vitor Sessak
3 
+ *
4 
+ * This file is part of FFmpeg.
5 
+ *
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.
10 
+ *
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.
15 
+ *
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
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+ */
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+
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+int av_vsrc_buffer_add_frame(AVFilterContext *buffer_filter, AVFrame *frame,
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+                             int64_t pts, AVRational pixel_aspect);
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+