gstreamer/subprojects/gst-plugins-good/ext/libpng/gstpngenc.h
Tim-Philipp Müller d69885e0f7 pngenc: output one frame only in snapshot mode
In snapshot mode pngenc should output exactly one frame
and then return FLOW_EOS to upstream. If upstream sends
more input frames before shutting down, it should keep
returning FLOW_EOS but not output any more encoded frames.

After a flushing seek it should output frames again though.

Fixes #3069.

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/5546>
2023-10-27 05:47:37 +00:00

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1.6 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2012 Collabora Ltd.
* Author : Edward Hervey <edward@collabora.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_PNGENC_H__
#define __GST_PNGENC_H__
#include <gst/gst.h>
#include <gst/video/gstvideoencoder.h>
#include <png.h>
G_BEGIN_DECLS
#define GST_TYPE_PNGENC (gst_pngenc_get_type())
G_DECLARE_FINAL_TYPE (GstPngEnc, gst_pngenc, GST, PNGENC, GstVideoEncoder)
struct _GstPngEnc
{
GstVideoEncoder parent;
GstVideoCodecState *input_state;
GstMemory *output_mem;
GstMapInfo output_map;
gsize output_mem_pos;
png_structp png_struct_ptr;
png_infop png_info_ptr;
gint png_color_type;
gint depth;
guint compression_level;
gboolean snapshot;
guint frame_count;
};
GST_ELEMENT_REGISTER_DECLARE (pngenc);
G_END_DECLS
#endif /* __GST_PNGENC_H__ */