gstreamer/ext/ffmpeg/gstffmpegdeinterlace.c
2011-06-08 18:04:07 +02:00

220 lines
6.6 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* This file:
* Copyright (C) 2005 Luca Ognibene <luogni@tin.it>
* Copyright (C) 2006 Martin Zlomek <martin.zlomek@itonis.tv>
*
* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#ifdef HAVE_FFMPEG_UNINSTALLED
# include <avcodec.h>
#else
# include <libavcodec/avcodec.h>
#endif
#include <gst/gst.h>
#include <gst/video/video.h>
#include "gstffmpeg.h"
#include "gstffmpegcodecmap.h"
#include "gstffmpegutils.h"
typedef struct _GstFFMpegDeinterlace
{
GstElement element;
GstPad *sinkpad, *srcpad;
gint width, height;
gint to_size;
enum PixelFormat pixfmt;
AVPicture from_frame, to_frame;
} GstFFMpegDeinterlace;
typedef struct _GstFFMpegDeinterlaceClass
{
GstElementClass parent_class;
} GstFFMpegDeinterlaceClass;
#define GST_TYPE_FFMPEGDEINTERLACE \
(gst_ffmpegdeinterlace_get_type())
#define GST_FFMPEGDEINTERLACE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FFMPEGDEINTERLACE,GstFFMpegDeinterlace))
#define GST_FFMPEGDEINTERLACE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FFMPEGDEINTERLACE,GstFFMpegDeinterlace))
#define GST_IS_FFMPEGDEINTERLACE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FFMPEGDEINTERLACE))
#define GST_IS_FFMPEGDEINTERLACE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FFMPEGDEINTERLACE))
GType gst_ffmpegdeinterlace_get_type (void);
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
G_DEFINE_TYPE (GstFFMpegDeinterlace, gst_ffmpegdeinterlace, GST_TYPE_ELEMENT);
static GstFlowReturn gst_ffmpegdeinterlace_chain (GstPad * pad,
GstBuffer * inbuf);
static void
gst_ffmpegdeinterlace_class_init (GstFFMpegDeinterlaceClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_details_simple (element_class,
"FFMPEG Deinterlace element", "Filter/Effect/Video/Deinterlace",
"Deinterlace video", "Luca Ognibene <luogni@tin.it>");
}
static gboolean
gst_ffmpegdeinterlace_sink_event (GstPad * pad, GstEvent * event)
{
GstFFMpegDeinterlace *deinterlace =
GST_FFMPEGDEINTERLACE (gst_pad_get_parent (pad));
gboolean ret = FALSE;
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_CAPS:
{
GstStructure *structure;
AVCodecContext *ctx;
GstCaps *caps, *src_caps;
gst_event_parse_caps (event, &caps);
structure = gst_caps_get_structure (caps, 0);
if (!gst_structure_get_int (structure, "width", &deinterlace->width) ||
!gst_structure_get_int (structure, "height", &deinterlace->height)) {
goto done;
}
ctx = avcodec_alloc_context ();
ctx->width = deinterlace->width;
ctx->height = deinterlace->height;
ctx->pix_fmt = PIX_FMT_NB;
gst_ffmpeg_caps_with_codectype (AVMEDIA_TYPE_VIDEO, caps, ctx);
if (ctx->pix_fmt == PIX_FMT_NB) {
av_free (ctx);
goto done;
}
deinterlace->pixfmt = ctx->pix_fmt;
av_free (ctx);
deinterlace->to_size =
avpicture_get_size (deinterlace->pixfmt, deinterlace->width,
deinterlace->height);
src_caps = gst_caps_copy (caps);
gst_event_unref (event);
gst_caps_set_simple (src_caps, "interlaced", G_TYPE_BOOLEAN, FALSE, NULL);
event = gst_event_new_caps (src_caps);
gst_caps_unref (src_caps);
}
break;
default:
break;
}
ret = gst_pad_push_event (deinterlace->srcpad, event);
done:
gst_object_unref (deinterlace);
return ret;
}
static void
gst_ffmpegdeinterlace_init (GstFFMpegDeinterlace * deinterlace)
{
deinterlace->sinkpad =
gst_pad_new_from_static_template (&sink_factory, "sink");
gst_pad_set_event_function (deinterlace->sinkpad,
gst_ffmpegdeinterlace_sink_event);
gst_pad_set_chain_function (deinterlace->sinkpad,
gst_ffmpegdeinterlace_chain);
gst_element_add_pad (GST_ELEMENT (deinterlace), deinterlace->sinkpad);
deinterlace->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
gst_element_add_pad (GST_ELEMENT (deinterlace), deinterlace->srcpad);
deinterlace->pixfmt = PIX_FMT_NB;
}
static GstFlowReturn
gst_ffmpegdeinterlace_chain (GstPad * pad, GstBuffer * inbuf)
{
GstFFMpegDeinterlace *deinterlace =
GST_FFMPEGDEINTERLACE (gst_pad_get_parent (pad));
GstBuffer *outbuf = NULL;
GstFlowReturn result;
guint8 *from_data, *to_data;
gsize from_size, to_size;
outbuf = gst_buffer_new_and_alloc (deinterlace->to_size);
from_data = gst_buffer_map (inbuf, &from_size, NULL, GST_MAP_READ);
gst_ffmpeg_avpicture_fill (&deinterlace->from_frame, from_data,
deinterlace->pixfmt, deinterlace->width, deinterlace->height);
to_data = gst_buffer_map (outbuf, &to_size, NULL, GST_MAP_WRITE);
gst_ffmpeg_avpicture_fill (&deinterlace->to_frame, to_data,
deinterlace->pixfmt, deinterlace->width, deinterlace->height);
avpicture_deinterlace (&deinterlace->to_frame, &deinterlace->from_frame,
deinterlace->pixfmt, deinterlace->width, deinterlace->height);
gst_buffer_unmap (outbuf, to_data, to_size);
gst_buffer_unmap (inbuf, from_data, from_size);
gst_buffer_copy_into (outbuf, inbuf, GST_BUFFER_COPY_TIMESTAMPS, 0, -1);
result = gst_pad_push (deinterlace->srcpad, outbuf);
gst_buffer_unref (inbuf);
return result;
}
gboolean
gst_ffmpegdeinterlace_register (GstPlugin * plugin)
{
return gst_element_register (plugin, "ffdeinterlace",
GST_RANK_NONE, GST_TYPE_FFMPEGDEINTERLACE);
}