gstreamer/gst/videodrop/gstvideodrop.c

384 lines
11 KiB
C
Raw Normal View History

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
*
* 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
#include <gstvideodrop.h>
#include <gst/video/video.h>
/* elementfactory information */
Define GstElementDetails as const and also static (when defined as global) Original commit message from CVS: * ext/amrwb/gstamrwbdec.c: * ext/amrwb/gstamrwbenc.c: * ext/amrwb/gstamrwbparse.c: * ext/arts/gst_arts.c: * ext/artsd/gstartsdsink.c: * ext/audiofile/gstafparse.c: * ext/audiofile/gstafsink.c: * ext/audiofile/gstafsrc.c: * ext/audioresample/gstaudioresample.c: * ext/bz2/gstbz2dec.c: * ext/bz2/gstbz2enc.c: * ext/cdaudio/gstcdaudio.c: * ext/directfb/dfbvideosink.c: * ext/divx/gstdivxdec.c: * ext/divx/gstdivxenc.c: * ext/dts/gstdtsdec.c: (gst_dtsdec_base_init): * ext/faac/gstfaac.c: (gst_faac_base_init): * ext/faad/gstfaad.c: * ext/gsm/gstgsmdec.c: * ext/gsm/gstgsmenc.c: * ext/hermes/gsthermescolorspace.c: * ext/ivorbis/vorbisfile.c: * ext/lcs/gstcolorspace.c: * ext/libfame/gstlibfame.c: * ext/libmms/gstmms.c: (gst_mms_base_init): * ext/musepack/gstmusepackdec.c: (gst_musepackdec_base_init): * ext/musicbrainz/gsttrm.c: (gst_musicbrainz_base_init): * ext/nas/nassink.c: (gst_nassink_base_init): * ext/neon/gstneonhttpsrc.c: * ext/sdl/sdlaudiosink.c: * ext/sdl/sdlvideosink.c: * ext/shout/gstshout.c: * ext/snapshot/gstsnapshot.c: * ext/sndfile/gstsf.c: * ext/swfdec/gstswfdec.c: * ext/tarkin/gsttarkindec.c: * ext/tarkin/gsttarkinenc.c: * ext/theora/theoradec.c: * ext/wavpack/gstwavpackdec.c: (gst_wavpack_dec_base_init): * ext/wavpack/gstwavpackparse.c: (gst_wavpack_parse_base_init): * ext/xvid/gstxviddec.c: * ext/xvid/gstxvidenc.c: * gst/cdxaparse/gstcdxaparse.c: (gst_cdxa_parse_base_init): * gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_base_init): * gst/chart/gstchart.c: * gst/colorspace/gstcolorspace.c: * gst/deinterlace/gstdeinterlace.c: * gst/equalizer/gstiirequalizer.c: (gst_iir_equalizer_base_init): * gst/festival/gstfestival.c: * gst/filter/gstbpwsinc.c: * gst/filter/gstiir.c: * gst/filter/gstlpwsinc.c: * gst/freeze/gstfreeze.c: * gst/games/gstpuzzle.c: (gst_puzzle_base_init): * gst/librfb/gstrfbsrc.c: * gst/mixmatrix/mixmatrix.c: * gst/mpeg1sys/gstmpeg1systemencode.c: * gst/mpeg1videoparse/gstmp1videoparse.c: * gst/mpeg2sub/gstmpeg2subt.c: * gst/mpegaudioparse/gstmpegaudioparse.c: * gst/multifilesink/gstmultifilesink.c: * gst/overlay/gstoverlay.c: * gst/passthrough/gstpassthrough.c: * gst/playondemand/gstplayondemand.c: * gst/qtdemux/qtdemux.c: * gst/rtjpeg/gstrtjpegdec.c: * gst/rtjpeg/gstrtjpegenc.c: * gst/smooth/gstsmooth.c: * gst/smoothwave/gstsmoothwave.c: * gst/spectrum/gstspectrum.c: * gst/speed/gstspeed.c: * gst/stereo/gststereo.c: * gst/switch/gstswitch.c: * gst/tta/gstttadec.c: (gst_tta_dec_base_init): * gst/tta/gstttaparse.c: (gst_tta_parse_base_init): * gst/vbidec/gstvbidec.c: * gst/videocrop/gstvideocrop.c: * gst/videodrop/gstvideodrop.c: * gst/virtualdub/gstxsharpen.c: * gst/xingheader/gstxingmux.c: (gst_xing_mux_base_init): * gst/y4m/gsty4mencode.c: * sys/cdrom/gstcdplayer.c: * sys/directdraw/gstdirectdrawsink.c: * sys/directsound/gstdirectsoundsink.c: * sys/glsink/glimagesink.c: * sys/qcam/gstqcamsrc.c: * sys/v4l2/gstv4l2src.c: * sys/vcd/vcdsrc.c: (gst_vcdsrc_base_init): * sys/ximagesrc/ximagesrc.c: Define GstElementDetails as const and also static (when defined as global)
2006-04-25 21:56:38 +00:00
static const GstElementDetails videodrop_details =
Unify the long descriptions in the plugin details (#337263). Original commit message from CVS: Patch by: j^ <j at bootlab dot org> * ext/amrwb/gstamrwbdec.c: * ext/amrwb/gstamrwbenc.c: * ext/amrwb/gstamrwbparse.c: * ext/arts/gst_arts.c: * ext/artsd/gstartsdsink.c: * ext/audiofile/gstafparse.c: * ext/audiofile/gstafsink.c: * ext/audiofile/gstafsrc.c: * ext/cdaudio/gstcdaudio.c: * ext/directfb/dfbvideosink.c: * ext/divx/gstdivxdec.c: * ext/divx/gstdivxenc.c: * ext/dts/gstdtsdec.c: (gst_dtsdec_base_init): * ext/faac/gstfaac.c: (gst_faac_base_init): * ext/faad/gstfaad.c: * ext/gsm/gstgsmdec.c: * ext/gsm/gstgsmenc.c: * ext/hermes/gsthermescolorspace.c: * ext/ivorbis/vorbisfile.c: * ext/lcs/gstcolorspace.c: * ext/libfame/gstlibfame.c: * ext/libmms/gstmms.c: (gst_mms_base_init): * ext/musicbrainz/gsttrm.c: (gst_musicbrainz_base_init): * ext/nas/nassink.c: (gst_nassink_base_init): * ext/neon/gstneonhttpsrc.c: * ext/polyp/polypsink.c: (gst_polypsink_base_init): * ext/sdl/sdlaudiosink.c: * ext/sdl/sdlvideosink.c: * ext/shout/gstshout.c: * ext/snapshot/gstsnapshot.c: * ext/sndfile/gstsf.c: * ext/tarkin/gsttarkindec.c: * ext/tarkin/gsttarkinenc.c: * ext/theora/theoradec.c: * ext/wavpack/gstwavpackdec.c: (gst_wavpack_dec_base_init): * ext/wavpack/gstwavpackparse.c: (gst_wavpack_parse_base_init): * ext/xvid/gstxviddec.c: * ext/xvid/gstxvidenc.c: * gst/cdxaparse/gstcdxaparse.c: (gst_cdxa_parse_base_init): * gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_base_init): * gst/chart/gstchart.c: * gst/equalizer/gstiirequalizer.c: (gst_iir_equalizer_base_init): * gst/festival/gstfestival.c: * gst/filter/gstiir.c: * gst/filter/gstlpwsinc.c: * gst/freeze/gstfreeze.c: * gst/games/gstpuzzle.c: (gst_puzzle_base_init): * gst/mixmatrix/mixmatrix.c: * gst/mpeg1sys/gstmpeg1systemencode.c: * gst/mpeg1videoparse/gstmp1videoparse.c: * gst/mpeg2sub/gstmpeg2subt.c: * gst/mpegaudioparse/gstmpegaudioparse.c: * gst/multifilesink/gstmultifilesink.c: * gst/overlay/gstoverlay.c: * gst/passthrough/gstpassthrough.c: * gst/playondemand/gstplayondemand.c: * gst/qtdemux/qtdemux.c: * gst/rtjpeg/gstrtjpegdec.c: * gst/rtjpeg/gstrtjpegenc.c: * gst/smooth/gstsmooth.c: * gst/tta/gstttadec.c: (gst_tta_dec_base_init): * gst/tta/gstttaparse.c: (gst_tta_parse_base_init): * gst/videocrop/gstvideocrop.c: * gst/videodrop/gstvideodrop.c: * gst/virtualdub/gstxsharpen.c: * gst/xingheader/gstxingmux.c: (gst_xing_mux_base_init): * gst/y4m/gsty4mencode.c: Unify the long descriptions in the plugin details (#337263).
2006-04-06 11:35:26 +00:00
GST_ELEMENT_DETAILS ("Frame dropper",
"Filter/Effect/Video",
Unify the long descriptions in the plugin details (#337263). Original commit message from CVS: Patch by: j^ <j at bootlab dot org> * ext/amrwb/gstamrwbdec.c: * ext/amrwb/gstamrwbenc.c: * ext/amrwb/gstamrwbparse.c: * ext/arts/gst_arts.c: * ext/artsd/gstartsdsink.c: * ext/audiofile/gstafparse.c: * ext/audiofile/gstafsink.c: * ext/audiofile/gstafsrc.c: * ext/cdaudio/gstcdaudio.c: * ext/directfb/dfbvideosink.c: * ext/divx/gstdivxdec.c: * ext/divx/gstdivxenc.c: * ext/dts/gstdtsdec.c: (gst_dtsdec_base_init): * ext/faac/gstfaac.c: (gst_faac_base_init): * ext/faad/gstfaad.c: * ext/gsm/gstgsmdec.c: * ext/gsm/gstgsmenc.c: * ext/hermes/gsthermescolorspace.c: * ext/ivorbis/vorbisfile.c: * ext/lcs/gstcolorspace.c: * ext/libfame/gstlibfame.c: * ext/libmms/gstmms.c: (gst_mms_base_init): * ext/musicbrainz/gsttrm.c: (gst_musicbrainz_base_init): * ext/nas/nassink.c: (gst_nassink_base_init): * ext/neon/gstneonhttpsrc.c: * ext/polyp/polypsink.c: (gst_polypsink_base_init): * ext/sdl/sdlaudiosink.c: * ext/sdl/sdlvideosink.c: * ext/shout/gstshout.c: * ext/snapshot/gstsnapshot.c: * ext/sndfile/gstsf.c: * ext/tarkin/gsttarkindec.c: * ext/tarkin/gsttarkinenc.c: * ext/theora/theoradec.c: * ext/wavpack/gstwavpackdec.c: (gst_wavpack_dec_base_init): * ext/wavpack/gstwavpackparse.c: (gst_wavpack_parse_base_init): * ext/xvid/gstxviddec.c: * ext/xvid/gstxvidenc.c: * gst/cdxaparse/gstcdxaparse.c: (gst_cdxa_parse_base_init): * gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_base_init): * gst/chart/gstchart.c: * gst/equalizer/gstiirequalizer.c: (gst_iir_equalizer_base_init): * gst/festival/gstfestival.c: * gst/filter/gstiir.c: * gst/filter/gstlpwsinc.c: * gst/freeze/gstfreeze.c: * gst/games/gstpuzzle.c: (gst_puzzle_base_init): * gst/mixmatrix/mixmatrix.c: * gst/mpeg1sys/gstmpeg1systemencode.c: * gst/mpeg1videoparse/gstmp1videoparse.c: * gst/mpeg2sub/gstmpeg2subt.c: * gst/mpegaudioparse/gstmpegaudioparse.c: * gst/multifilesink/gstmultifilesink.c: * gst/overlay/gstoverlay.c: * gst/passthrough/gstpassthrough.c: * gst/playondemand/gstplayondemand.c: * gst/qtdemux/qtdemux.c: * gst/rtjpeg/gstrtjpegdec.c: * gst/rtjpeg/gstrtjpegenc.c: * gst/smooth/gstsmooth.c: * gst/tta/gstttadec.c: (gst_tta_dec_base_init): * gst/tta/gstttaparse.c: (gst_tta_parse_base_init): * gst/videocrop/gstvideocrop.c: * gst/videodrop/gstvideodrop.c: * gst/virtualdub/gstxsharpen.c: * gst/xingheader/gstxingmux.c: (gst_xing_mux_base_init): * gst/y4m/gsty4mencode.c: Unify the long descriptions in the plugin details (#337263).
2006-04-06 11:35:26 +00:00
"Re-FPS'es video by dropping frames",
"Ronald Bultje <rbultje@ronald.bitfreak.net>");
/* GstVideodrop signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_SPEED
/* FILL ME */
};
static GstStaticPadTemplate gst_videodrop_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ YUY2, I420, YV12, YUYV, UYVY }")
)
);
static GstStaticPadTemplate gst_videodrop_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("{ YUY2, I420, YV12, YUYV, UYVY }")
)
);
static void gst_videodrop_base_init (gpointer g_class);
static void gst_videodrop_class_init (GstVideodropClass * klass);
static void gst_videodrop_init (GstVideodrop * videodrop);
static void gst_videodrop_chain (GstPad * pad, GstData * _data);
static void gst_videodrop_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_videodrop_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstStateChangeReturn gst_videodrop_change_state (GstElement * element,
GstStateChange transition);
static GstElementClass *parent_class = NULL;
/*static guint gst_videodrop_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_videodrop_get_type (void)
{
static GType videodrop_type = 0;
if (!videodrop_type) {
static const GTypeInfo videodrop_info = {
sizeof (GstVideodropClass),
gst_videodrop_base_init,
NULL,
(GClassInitFunc) gst_videodrop_class_init,
NULL,
NULL,
sizeof (GstVideodrop),
0,
(GInstanceInitFunc) gst_videodrop_init,
};
videodrop_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstVideodrop", &videodrop_info, 0);
}
return videodrop_type;
}
static void
gst_videodrop_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &videodrop_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_videodrop_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_videodrop_src_template));
}
static void
gst_videodrop_class_init (GstVideodropClass * klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
parent_class = g_type_class_peek_parent (klass);
g_object_class_install_property (object_class, ARG_SPEED,
g_param_spec_float ("speed", "Speed",
"Output speed (relative to input)", 0.01, 100, 1, G_PARAM_READWRITE));
object_class->set_property = gst_videodrop_set_property;
object_class->get_property = gst_videodrop_get_property;
element_class->change_state = gst_videodrop_change_state;
}
static GstCaps *
gst_videodrop_getcaps (GstPad * pad)
{
GstVideodrop *videodrop;
GstPad *otherpad;
GstCaps *caps, *copy, *copy2 = NULL;
int i;
gdouble otherfps;
GstStructure *structure;
gboolean negotiated;
videodrop = GST_VIDEODROP (gst_pad_get_parent (pad));
otherpad = (pad == videodrop->srcpad) ? videodrop->sinkpad :
videodrop->srcpad;
negotiated = gst_pad_is_negotiated (otherpad);
otherfps = (pad == videodrop->srcpad) ? videodrop->from_fps :
videodrop->to_fps;
caps = gst_pad_get_allowed_caps (otherpad);
copy = gst_caps_copy (caps);
if (negotiated) {
copy2 = gst_caps_copy (caps);
}
for (i = 0; i < gst_caps_get_size (caps); i++) {
structure = gst_caps_get_structure (caps, i);
gst_structure_set (structure,
"framerate", GST_TYPE_DOUBLE_RANGE, 0.0, G_MAXDOUBLE, NULL);
}
if ((negotiated) && (videodrop->speed != 1.0)) {
for (i = 0; i < gst_caps_get_size (copy2); i++) {
structure = gst_caps_get_structure (copy2, i);
gst_structure_set (structure,
"framerate", G_TYPE_DOUBLE, otherfps * videodrop->speed, NULL);
}
gst_caps_append (copy2, copy);
copy = copy2;
}
gst_caps_append (copy, caps);
return copy;
}
static GstPadLinkReturn
gst_videodrop_link (GstPad * pad, const GstCaps * caps)
{
GstVideodrop *videodrop;
GstStructure *structure;
gboolean ret;
double fps;
GstPad *otherpad;
videodrop = GST_VIDEODROP (gst_pad_get_parent (pad));
otherpad = (pad == videodrop->srcpad) ? videodrop->sinkpad :
videodrop->srcpad;
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_double (structure, "framerate", &fps);
if (!ret)
return GST_PAD_LINK_REFUSED;
if (pad == videodrop->srcpad) {
videodrop->to_fps = fps;
} else {
videodrop->from_fps = fps;
}
if (gst_pad_is_negotiated (otherpad)) {
/*
* Ensure that the other side talks the format we're trying to set
*/
GstCaps *newcaps = gst_caps_copy (caps);
if (pad == videodrop->srcpad) {
gst_caps_set_simple (newcaps,
"framerate", G_TYPE_DOUBLE, videodrop->from_fps, NULL);
} else {
gst_caps_set_simple (newcaps,
"framerate", G_TYPE_DOUBLE, videodrop->to_fps, NULL);
}
ret = gst_pad_try_set_caps (otherpad, newcaps);
if (GST_PAD_LINK_FAILED (ret)) {
return GST_PAD_LINK_REFUSED;
}
}
return GST_PAD_LINK_OK;
}
static void
gst_videodrop_init (GstVideodrop * videodrop)
{
renamed GST_FLAGS macros to GST_OBJECT_FLAGS moved bitshift from macro to enum definition Original commit message from CVS: * examples/indexing/indexmpeg.c: (main): * ext/artsd/gstartsdsink.c: (gst_artsdsink_open_audio), (gst_artsdsink_close_audio), (gst_artsdsink_change_state): * ext/artsd/gstartsdsink.h: * ext/audiofile/gstafparse.c: (gst_afparse_open_file), (gst_afparse_close_file): * ext/audiofile/gstafparse.h: * ext/audiofile/gstafsink.c: (gst_afsink_open_file), (gst_afsink_close_file), (gst_afsink_chain), (gst_afsink_change_state): * ext/audiofile/gstafsink.h: * ext/audiofile/gstafsrc.c: (gst_afsrc_open_file), (gst_afsrc_close_file), (gst_afsrc_change_state): * ext/audiofile/gstafsrc.h: * ext/cdaudio/gstcdaudio.c: (gst_cdaudio_init): * ext/directfb/directfbvideosink.c: (gst_directfbvideosink_init): * ext/dts/gstdtsdec.c: (gst_dtsdec_init): * ext/jack/gstjack.h: * ext/jack/gstjackbin.c: (gst_jack_bin_init), (gst_jack_bin_change_state): * ext/musepack/gstmusepackdec.c: (gst_musepackdec_init): * ext/musicbrainz/gsttrm.c: (gst_musicbrainz_init): * ext/nas/nassink.c: (gst_nassink_open_audio), (gst_nassink_close_audio), (gst_nassink_change_state): * ext/nas/nassink.h: * ext/polyp/polypsink.c: (gst_polypsink_init): * ext/sdl/sdlvideosink.c: (gst_sdlvideosink_change_state): * ext/sdl/sdlvideosink.h: * ext/smoothwave/gstsmoothwave.c: (gst_smoothwave_init): * ext/sndfile/gstsf.c: (gst_sf_set_property), (gst_sf_change_state), (gst_sf_release_request_pad), (gst_sf_open_file), (gst_sf_close_file), (gst_sf_loop): * ext/sndfile/gstsf.h: * ext/swfdec/gstswfdec.c: (gst_swfdec_init): * ext/tarkin/gsttarkindec.c: (gst_tarkindec_init): * gst/apetag/apedemux.c: (gst_ape_demux_init): * gst/cdxaparse/gstcdxaparse.c: (gst_cdxaparse_init): * gst/cdxaparse/gstcdxastrip.c: (gst_cdxastrip_init): * gst/festival/gstfestival.c: (gst_festival_change_state): * gst/festival/gstfestival.h: * gst/mpeg2sub/gstmpeg2subt.c: (gst_mpeg2subt_init): * gst/multifilesink/gstmultifilesink.c: (gst_multifilesink_init), (gst_multifilesink_set_location), (gst_multifilesink_open_file), (gst_multifilesink_close_file), (gst_multifilesink_next_file), (gst_multifilesink_pad_query), (gst_multifilesink_handle_event), (gst_multifilesink_chain), (gst_multifilesink_change_state): * gst/multifilesink/gstmultifilesink.h: * gst/videodrop/gstvideodrop.c: (gst_videodrop_init): * sys/cdrom/gstcdplayer.c: (cdplayer_init): * sys/dxr3/dxr3audiosink.c: (dxr3audiosink_init), (dxr3audiosink_open), (dxr3audiosink_close), (dxr3audiosink_chain_pcm), (dxr3audiosink_chain_ac3), (dxr3audiosink_change_state): * sys/dxr3/dxr3audiosink.h: * sys/dxr3/dxr3spusink.c: (dxr3spusink_init), (dxr3spusink_open), (dxr3spusink_close), (dxr3spusink_chain), (dxr3spusink_change_state): * sys/dxr3/dxr3spusink.h: * sys/dxr3/dxr3videosink.c: (dxr3videosink_init), (dxr3videosink_open), (dxr3videosink_close), (dxr3videosink_write_data), (dxr3videosink_change_state): * sys/dxr3/dxr3videosink.h: * sys/glsink/glimagesink.c: (gst_glimagesink_init): * sys/qcam/gstqcamsrc.c: (gst_qcamsrc_change_state), (gst_qcamsrc_open), (gst_qcamsrc_close): * sys/qcam/gstqcamsrc.h: * sys/v4l2/gstv4l2src.c: (gst_v4l2src_init): * sys/vcd/vcdsrc.c: (gst_vcdsrc_set_property), (gst_vcdsrc_get), (gst_vcdsrc_open_file), (gst_vcdsrc_close_file), (gst_vcdsrc_change_state), (gst_vcdsrc_recalculate): * sys/vcd/vcdsrc.h: renamed GST_FLAGS macros to GST_OBJECT_FLAGS moved bitshift from macro to enum definition
2005-10-12 14:29:55 +00:00
GST_OBJECT_FLAG_SET (videodrop, GST_ELEMENT_EVENT_AWARE);
GST_DEBUG ("gst_videodrop_init");
videodrop->sinkpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_videodrop_sink_template), "sink");
gst_element_add_pad (GST_ELEMENT (videodrop), videodrop->sinkpad);
gst_pad_set_chain_function (videodrop->sinkpad, gst_videodrop_chain);
gst_pad_set_getcaps_function (videodrop->sinkpad, gst_videodrop_getcaps);
gst_pad_set_link_function (videodrop->sinkpad, gst_videodrop_link);
videodrop->srcpad =
gst_pad_new_from_template (gst_static_pad_template_get
(&gst_videodrop_src_template), "src");
gst_element_add_pad (GST_ELEMENT (videodrop), videodrop->srcpad);
gst_pad_set_getcaps_function (videodrop->srcpad, gst_videodrop_getcaps);
gst_pad_set_link_function (videodrop->srcpad, gst_videodrop_link);
videodrop->inited = FALSE;
videodrop->total = videodrop->pass = 0;
videodrop->speed = 1.;
videodrop->time_adjust = 0;
}
static void
gst_videodrop_chain (GstPad * pad, GstData * data)
{
GstVideodrop *videodrop = GST_VIDEODROP (gst_pad_get_parent (pad));
GstBuffer *buf;
if (GST_IS_EVENT (data)) {
GstEvent *event = GST_EVENT (data);
if (GST_EVENT_TYPE (event) == GST_EVENT_DISCONTINUOUS) {
/* since we rely on timestamps of the source, we need to handle
* changes in time carefully. */
gint64 time;
if (gst_event_discont_get_value (event, GST_FORMAT_TIME, &time)) {
videodrop->total = videodrop->pass = 0;
videodrop->time_adjust = time;
} else {
GST_ELEMENT_ERROR (videodrop, STREAM, TOO_LAZY, (NULL),
("Received discont, but no time information"));
gst_event_unref (event);
return;
}
/* FIXME: increase timestamp / speed */
}
gst_pad_event_default (pad, event);
return;
}
buf = GST_BUFFER (data);
videodrop->total++;
GST_DEBUG ("Received buffer at %u:%02u:%02u:%09u, fps=%lf, pass=%"
G_GUINT64_FORMAT " of " G_GUINT64_FORMAT ", speed=%lf",
(guint) (GST_BUFFER_TIMESTAMP (buf) / (GST_SECOND * 60 * 60)),
(guint) ((GST_BUFFER_TIMESTAMP (buf) / (GST_SECOND * 60)) % 60),
(guint) ((GST_BUFFER_TIMESTAMP (buf) / GST_SECOND) % 60),
(guint) (GST_BUFFER_TIMESTAMP (buf) % GST_SECOND),
videodrop->to_fps, videodrop->total, videodrop->pass, videodrop->speed);
while (((GST_BUFFER_TIMESTAMP (buf) - videodrop->time_adjust) /
videodrop->speed * videodrop->to_fps / GST_SECOND) >=
videodrop->pass) {
/* since we write to the struct (time/duration), we need a new struct,
* but we don't want to copy around data - a subbuffer is the easiest
* way to accomplish that... */
GstBuffer *copy = gst_buffer_create_sub (buf, 0, GST_BUFFER_SIZE (buf));
/* adjust timestamp/duration and push forward */
GST_BUFFER_TIMESTAMP (copy) = (videodrop->time_adjust / videodrop->speed) +
GST_SECOND * videodrop->pass / videodrop->to_fps;
GST_BUFFER_DURATION (copy) = GST_SECOND / videodrop->to_fps;
GST_DEBUG ("Sending out buffer from out %u:%02u:%02u:%09u",
(guint) (GST_BUFFER_TIMESTAMP (copy) / (GST_SECOND * 60 * 60)),
(guint) ((GST_BUFFER_TIMESTAMP (copy) / (GST_SECOND * 60)) % 60),
(guint) ((GST_BUFFER_TIMESTAMP (copy) / GST_SECOND) % 60),
(guint) (GST_BUFFER_TIMESTAMP (copy) % GST_SECOND));
gst_pad_push (videodrop->srcpad, GST_DATA (copy));
videodrop->pass++;
}
gst_buffer_unref (buf);
}
static void
gst_videodrop_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstVideodrop *videodrop = GST_VIDEODROP (object);
switch (prop_id) {
case ARG_SPEED:
videodrop->speed = g_value_get_float (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_videodrop_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstVideodrop *videodrop = GST_VIDEODROP (object);
switch (prop_id) {
case ARG_SPEED:
g_value_set_float (value, videodrop->speed);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstStateChangeReturn
gst_videodrop_change_state (GstElement * element, GstStateChange transition)
{
GstVideodrop *videodrop = GST_VIDEODROP (element);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
videodrop->inited = FALSE;
videodrop->time_adjust = 0;
videodrop->total = videodrop->pass = 0;
break;
default:
break;
}
if (parent_class->change_state)
return parent_class->change_state (element, transition);
return GST_STATE_CHANGE_SUCCESS;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "videodrop", GST_RANK_NONE,
GST_TYPE_VIDEODROP);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videodrop",
"Re-FPS'es video",
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)