mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-19 14:56:36 +00:00
Code Issues 1 Projects Releases Wiki Activity

ext/ffmpeg/: Add ffvideoscale element (#303727)

Browse source 
Original commit message from CVS:
* ext/ffmpeg/gstffmpeg.c (plugin_init):
* ext/ffmpeg/Makefile.am:
* ext/ffmpeg/gstffmpegscale.c:
Add ffvideoscale element (#303727)

* TODO:
update TODO
This commit is contained in:
Luca Ognibene 2005-05-13 15:46:42 +00:00
parent 1857bd51da
commit eea570791c
5 changed files with 462 additions and 3 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
ChangeLog
View file

@ -1,5 +1,13 @@
2005-05-13 Luca Ognibene <luogni@tin.it>
* ext/ffmpeg/gstffmpeg.c (plugin_init):
* ext/ffmpeg/Makefile.am:
* ext/ffmpeg/gstffmpegscale.c:
Add ffvideoscale element (#303727)
* TODO:
update TODO
* ext/ffmpeg/gstffmpegcodecmap.c (gst_ffmpeg_pixfmt_to_caps):
Add support for GRAY8 colorspace

4
TODO
View file

@ -2,14 +2,14 @@ The never-ending story of new features:
* add more codecs into our codec map
* encoding support lacks:
- event handling (particularly discont/flush and EOS)
* both encoding and decoding lacks:
* encoding lacks:
- prevent data copying
* demux/mux support lacks:
- good testing of exotic formats
- correct caps sets on the pad templates
- event handling in the loop function (mux)
- prevent data copying
* ffvideoscale, ffdeinterlace and other filter elements
* ffdeinterlace and other filter elements
* can we wrap URLProtocol as a source/sink?
If you have cool ideas, add them here or contact the mailinglist:

3
ext/ffmpeg/Makefile.am
View file

@ -8,7 +8,8 @@ libgstffmpeg_la_SOURCES = gstffmpeg.c \
gstffmpegenc.c \
gstffmpegmux.c \
gstffmpegprotocol.c \
gstffmpegcolorspace.c
gstffmpegcolorspace.c \
gstffmpegscale.c
libgstffmpeg_la_CFLAGS = $(GST_CFLAGS) \
-I $(top_srcdir)/gst-libs/ext/ffmpeg/libavformat \

1
ext/ffmpeg/gstffmpeg.c
View file

@ -82,6 +82,7 @@ plugin_init (GstPlugin * plugin)
gst_ffmpegdemux_register (plugin);
gst_ffmpegmux_register (plugin);
gst_ffmpegcsp_register (plugin);
gst_ffmpegscale_register (plugin);
register_protocol (&gstreamer_protocol);

449
ext/ffmpeg/gstffmpegscale.c Normal file
View file

@ -0,0 +1,449 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* This file:
* Copyright (C) 2005 Luca Ognibene <luogni@tin.it>
*
* 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 <gst/gst.h>
#ifdef HAVE_FFMPEG_UNINSTALLED
#include <avcodec.h>
#else
#include <ffmpeg/avcodec.h>
#endif
#include <gst/video/video.h>
#include "gstffmpeg.h"
#include "gstffmpegcodecmap.h"
#define GST_TYPE_FFMPEGSCALE \
(gst_ffmpegscale_get_type())
#define GST_FFMPEGSCALE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_FFMPEGSCALE,GstFFMpegScale))
#define GST_FFMPEGSCALE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_FFMPEGSCALE,GstFFMpegScale))
#define GST_IS_FFMPEGSCALE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_FFMPEGSCALE))
#define GST_IS_FFMPEGSCALE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_FFMPEGSCALE))
typedef struct _GstFFMpegScale GstFFMpegScale;
typedef struct _GstFFMpegScaleClass GstFFMpegScaleClass;
struct _GstFFMpegScale
{
GstElement element;
GstPad *sinkpad, *srcpad;
gint from_width, from_height;
gint to_width, to_height;
enum PixelFormat pixfmt;
AVPicture from_frame, to_frame;
GstCaps *sinkcaps;
guint to_size;
ImgReSampleContext *res;
gboolean passthru;
};
struct _GstFFMpegScaleClass
{
GstElementClass parent_class;
};
/* elementfactory information */
static GstElementDetails ffmpegscale_details = {
"FFMPEG Scale element",
"Filter/Converter/Video",
"Converts video from one resolution to another",
"Luca Ognibene <luogni@tin.it>",
};
/* Signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
};
static GstStaticPadTemplate gst_ffmpegscale_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
static GstStaticPadTemplate gst_ffmpegscale_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
static GType gst_ffmpegscale_get_type (void);
static void gst_ffmpegscale_base_init (GstFFMpegScaleClass * klass);
static void gst_ffmpegscale_class_init (GstFFMpegScaleClass * klass);
static void gst_ffmpegscale_init (GstFFMpegScale * space);
static void gst_ffmpegscale_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_ffmpegscale_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
static GstPadLinkReturn
gst_ffmpegscale_pad_link (GstPad * pad, const GstCaps * caps);
static void gst_ffmpegscale_chain (GstPad * pad, GstData * data);
static GstElementStateReturn gst_ffmpegscale_change_state (GstElement * element);
static GstElementClass *parent_class = NULL;
/*static guint gst_ffmpegscale_signals[LAST_SIGNAL] = { 0 }; */
static GstCaps *
gst_ffmpegscale_getcaps (GstPad * pad)
{
GstFFMpegScale *filter;
GstCaps *othercaps;
GstCaps *caps;
GstPad *otherpad;
gint i;
filter = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
othercaps = gst_pad_get_allowed_caps (otherpad);
caps = gst_caps_intersect (othercaps, gst_pad_get_pad_template_caps (pad));
gst_caps_free (othercaps);
for (i = 0; i < gst_caps_get_size (caps); i++) {
GstStructure *structure = gst_caps_get_structure (caps, i);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 16, 4096,
"height", GST_TYPE_INT_RANGE, 16, 4096, NULL);
gst_structure_remove_field (structure, "pixel-aspect-ratio");
}
GST_DEBUG ("getcaps are: %" GST_PTR_FORMAT, caps);
return caps;
}
static GstPadLinkReturn
gst_ffmpegscale_pad_link (GstPad * pad, const GstCaps * caps)
{
GstStructure *structure;
AVCodecContext *ctx;
GstFFMpegScale *scale;
const GstCaps *othercaps;
GstPad *otherpad;
GstPadLinkReturn ret;
int height, width;
double framerate;
const GValue *par = NULL;
gchar *caps_string;
caps_string = gst_caps_to_string (caps);
GST_DEBUG ("ffmpegscale _link %s\n", caps_string);
g_free (caps_string);
scale = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
otherpad = (pad == scale->srcpad) ? scale->sinkpad :
scale->srcpad;
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", &width);
ret &= gst_structure_get_int (structure, "height", &height);
ctx = avcodec_alloc_context ();
ctx->width = width;
ctx->height = height;
ctx->pix_fmt = PIX_FMT_NB;
gst_ffmpeg_caps_with_codectype (CODEC_TYPE_VIDEO, caps, ctx);
if (ctx->pix_fmt == PIX_FMT_NB) {
av_free (ctx);
/* we disable ourself here */
return GST_PAD_LINK_REFUSED;
}
scale->pixfmt = ctx->pix_fmt;
av_free (ctx);
ret = gst_pad_try_set_caps (otherpad, caps);
if (ret == GST_PAD_LINK_OK) {
/* cool, we can use passthru */
scale->to_width = width;
scale->to_height = height;
scale->from_width = width;
scale->from_height = height;
scale->passthru = TRUE;
GST_FLAG_SET (scale, GST_ELEMENT_WORK_IN_PLACE);
return GST_PAD_LINK_OK;
}
if (gst_pad_is_negotiated (otherpad)) {
GstCaps *newcaps = gst_caps_copy (caps);
if (pad == scale->srcpad) {
gst_caps_set_simple (newcaps,
"width", G_TYPE_INT, scale->from_width,
"height", G_TYPE_INT, scale->from_height, NULL);
} else {
gst_caps_set_simple (newcaps,
"width", G_TYPE_INT, scale->to_width,
"height", G_TYPE_INT, scale->to_height, NULL);
}
ret = gst_pad_try_set_caps (otherpad, newcaps);
gst_caps_free (newcaps);
if (GST_PAD_LINK_FAILED (ret)) {
return GST_PAD_LINK_REFUSED;
}
}
scale->passthru = FALSE;
GST_FLAG_UNSET (scale, GST_ELEMENT_WORK_IN_PLACE);
if (pad == scale->srcpad) {
scale->to_width = width;
scale->to_height = height;
} else {
scale->from_width = width;
scale->from_height = height;
}
if (gst_pad_is_negotiated (otherpad)) {
scale->to_size = avpicture_get_size (scale->pixfmt, scale->to_width, scale->to_height);
if (scale->res != NULL) img_resample_close (scale->res);
scale->res = img_resample_init (scale->to_width, scale->to_height,
scale->from_width, scale->from_height);
}
return GST_PAD_LINK_OK;
}
static GType
gst_ffmpegscale_get_type (void)
{
static GType ffmpegscale_type = 0;
if (!ffmpegscale_type) {
static const GTypeInfo ffmpegscale_info = {
sizeof (GstFFMpegScaleClass),
(GBaseInitFunc) gst_ffmpegscale_base_init,
NULL,
(GClassInitFunc) gst_ffmpegscale_class_init,
NULL,
NULL,
sizeof (GstFFMpegScale),
0,
(GInstanceInitFunc) gst_ffmpegscale_init,
};
ffmpegscale_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstFFMpegScale", &ffmpegscale_info, 0);
}
return ffmpegscale_type;
}
static void
gst_ffmpegscale_base_init (GstFFMpegScaleClass * klass)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
gst_element_class_set_details (element_class, &ffmpegscale_details);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_ffmpegscale_src_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_ffmpegscale_sink_template));
}
static void
gst_ffmpegscale_class_init (GstFFMpegScaleClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->set_property = gst_ffmpegscale_set_property;
gobject_class->get_property = gst_ffmpegscale_get_property;
gstelement_class->change_state = gst_ffmpegscale_change_state;
}
static void
gst_ffmpegscale_init (GstFFMpegScale * scale)
{
scale->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get
(&gst_ffmpegscale_sink_template),
"sink");
gst_pad_set_link_function (scale->sinkpad, gst_ffmpegscale_pad_link);
gst_pad_set_getcaps_function (scale->sinkpad, gst_ffmpegscale_getcaps);
gst_pad_set_chain_function (scale->sinkpad, gst_ffmpegscale_chain);
gst_element_add_pad (GST_ELEMENT (scale), scale->sinkpad);
scale->srcpad = gst_pad_new_from_template (gst_static_pad_template_get
(&gst_ffmpegscale_src_template),
"src");
gst_element_add_pad (GST_ELEMENT (scale), scale->srcpad);
gst_pad_set_link_function (scale->srcpad, gst_ffmpegscale_pad_link);
gst_pad_set_getcaps_function (scale->srcpad, gst_ffmpegscale_getcaps);
scale->pixfmt = PIX_FMT_NB;
scale->passthru = FALSE;
scale->res = NULL;
}
static void
gst_ffmpegscale_chain (GstPad * pad, GstData * data)
{
GstBuffer *inbuf = GST_BUFFER (data);
GstFFMpegScale *scale;
GstBuffer *outbuf = NULL;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (inbuf != NULL);
scale = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
g_return_if_fail (scale != NULL);
g_return_if_fail (GST_IS_FFMPEGSCALE (scale));
if (!GST_PAD_IS_USABLE (scale->srcpad)) {
gst_buffer_unref (inbuf);
return;
}
if (scale->passthru == TRUE) {
gst_pad_push (scale->srcpad, GST_DATA (inbuf));
return ;
}
outbuf = gst_pad_alloc_buffer (scale->srcpad, GST_BUFFER_OFFSET_NONE, scale->to_size);
gst_ffmpeg_avpicture_fill (&scale->from_frame,
GST_BUFFER_DATA (inbuf),
scale->pixfmt,
scale->from_width, scale->from_height);
gst_ffmpeg_avpicture_fill (&scale->to_frame,
GST_BUFFER_DATA (outbuf),
scale->pixfmt,
scale->to_width, scale->to_height);
img_resample (scale->res, &scale->to_frame, &scale->from_frame);
gst_buffer_unref (inbuf);
gst_pad_push (scale->srcpad, GST_DATA (outbuf));
}
static GstElementStateReturn
gst_ffmpegscale_change_state (GstElement * element)
{
GstFFMpegScale *scale;
scale = GST_FFMPEGSCALE (element);
switch (GST_STATE_TRANSITION (element)) {
case GST_STATE_READY_TO_NULL:
img_resample_close (scale->res);
break;
}
if (parent_class->change_state)
return parent_class->change_state (element);
return GST_STATE_SUCCESS;
}
static void
gst_ffmpegscale_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstFFMpegScale *scale;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FFMPEGSCALE (object));
scale = GST_FFMPEGSCALE (object);
switch (prop_id) {
default:
break;
}
}
static void
gst_ffmpegscale_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstFFMpegScale *scale;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_FFMPEGSCALE (object));
scale = GST_FFMPEGSCALE (object);
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
gboolean
gst_ffmpegscale_register (GstPlugin * plugin)
{
return gst_element_register (plugin, "ffvideoscale",
GST_RANK_NONE, GST_TYPE_FFMPEGSCALE);
}