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ext/ffmpeg/: Port of ffvideoscale to 0.10.

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Original commit message from CVS:
Reviewed by : Edward Hervey  <edward@fluendo.com>
* ext/ffmpeg/Makefile.am:
* ext/ffmpeg/gstffmpeg.c: (plugin_init):
* ext/ffmpeg/gstffmpegscale.c: (gst_ffmpegscale_base_init),
(gst_ffmpegscale_class_init), (gst_ffmpegscale_init),
(gst_ffmpegscale_finalize), (gst_ffmpegscale_transform_caps),
(gst_ffmpegscale_fixate_caps), (gst_ffmpegscale_get_unit_size),
(gst_ffmpegscale_set_caps), (gst_ffmpegscale_transform),
(gst_ffmpegscale_handle_src_event), (gst_ffmpegscale_register):
Port of ffvideoscale to 0.10.
Closes #332557
This commit is contained in:
Edward Hervey 2006-03-01 15:08:08 +00:00
parent a96a9ed0c5
commit 1b5a9e3fca
4 changed files with 306 additions and 339 deletions
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15
ChangeLog
View file

@ -1,3 +1,18 @@
2006-03-01 Michal Benes <michal dot benes at xeris dot cz>
Reviewed by : Edward Hervey <edward@fluendo.com>
* ext/ffmpeg/Makefile.am:
* ext/ffmpeg/gstffmpeg.c: (plugin_init):
* ext/ffmpeg/gstffmpegscale.c: (gst_ffmpegscale_base_init),
(gst_ffmpegscale_class_init), (gst_ffmpegscale_init),
(gst_ffmpegscale_finalize), (gst_ffmpegscale_transform_caps),
(gst_ffmpegscale_fixate_caps), (gst_ffmpegscale_get_unit_size),
(gst_ffmpegscale_set_caps), (gst_ffmpegscale_transform),
(gst_ffmpegscale_handle_src_event), (gst_ffmpegscale_register):
Port of ffvideoscale to 0.10.
Closes #332557
2006-03-01 Josef Zlomek <josef dot zlomek at itonis dot tv>
Reviewed by : Edward Hervey <edward@fluendo.com>

14
ext/ffmpeg/Makefile.am
View file

@ -1,14 +1,14 @@
plugin_LTLIBRARIES = libgstffmpeg.la
libgstffmpeg_la_SOURCES = gstffmpeg.c \
libgstffmpeg_la_SOURCES = gstffmpeg.c \
gstffmpegprotocol.c \
gstffmpegcodecmap.c \
gstffmpegdec.c \
gstffmpegenc.c \
gstffmpegdeinterlace.c \
gstffmpegdec.c \
gstffmpegdemux.c \
gstffmpegprotocol.c
# gstffmpegmux.c \
# gstffmpegscale.c
gstffmpegdeinterlace.c \
gstffmpegscale.c
# gstffmpegmux.c
libgstffmpeg_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) \
-I $(top_srcdir)/gst-libs/ext/ffmpeg/libavformat \
@ -16,7 +16,7 @@ libgstffmpeg_la_CFLAGS = $(GST_CFLAGS) $(GST_PLUGINS_BASE_CFLAGS) \
-I $(top_srcdir)/gst-libs/ext/ffmpeg/libavcodec
libgstffmpeg_la_LIBADD = \
$(top_builddir)/gst-libs/ext/ffmpeg/libavformat/libavformat.la \
$(GST_LIBS)
$(GST_BASE_LIBS)
libgstffmpeg_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
noinst_HEADERS = \

4
ext/ffmpeg/gstffmpeg.c
View file

@ -109,12 +109,12 @@ plugin_init (GstPlugin * plugin)
gst_ffmpegenc_register (plugin);
gst_ffmpegdec_register (plugin);
gst_ffmpegdeinterlace_register (plugin);
gst_ffmpegdemux_register (plugin);
gst_ffmpegdeinterlace_register (plugin);
gst_ffmpegscale_register (plugin);
#if 0
gst_ffmpegmux_register (plugin);
gst_ffmpegcsp_register (plugin);
gst_ffmpegscale_register (plugin);
#endif
register_protocol (&gstreamer_protocol);

612
ext/ffmpeg/gstffmpegscale.c
View file

@ -2,6 +2,7 @@
* 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
@ -23,133 +24,151 @@
#include "config.h"
#endif
#include <gst/gst.h>
#ifdef HAVE_FFMPEG_UNINSTALLED
#include <avcodec.h>
#else
#include <ffmpeg/avcodec.h>
#endif
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#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
typedef struct _GstFFMpegScale
{
GstElement element;
GstBaseTransform element;
GstPad *sinkpad, *srcpad;
gint from_width, from_height;
gint to_width, to_height;
gint in_width, in_height;
gint out_width, out_height;
enum PixelFormat pixfmt;
AVPicture from_frame, to_frame;
GstCaps *sinkcaps;
guint to_size;
ImgReSampleContext *res;
} GstFFMpegScale;
gboolean passthru;
};
struct _GstFFMpegScaleClass
typedef struct _GstFFMpegScaleClass
{
GstElementClass parent_class;
};
GstBaseTransformClass parent_class;
} GstFFMpegScaleClass;
/* elementfactory information */
static GstElementDetails ffmpegscale_details = {
"FFMPEG Scale element",
"Filter/Converter/Video",
"Converts video from one resolution to another",
"Luca Ognibene <luogni@tin.it>",
};
#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,GstFFMpegScaleClass))
#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))
/* Signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
};
static GstStaticPadTemplate gst_ffmpegscale_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
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 gst_ffmpegscale_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420"))
);
GST_BOILERPLATE (GstFFMpegScale, gst_ffmpegscale, GstBaseTransform,
GST_TYPE_BASE_TRANSFORM);
static GType gst_ffmpegscale_get_type (void);
static void gst_ffmpegscale_finalize (GObject * object);
static void gst_ffmpegscale_base_init (GstFFMpegScaleClass * klass);
static void gst_ffmpegscale_class_init (GstFFMpegScaleClass * klass);
static void gst_ffmpegscale_init (GstFFMpegScale * space);
static GstCaps *gst_ffmpegscale_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps);
static void gst_ffmpegscale_fixate_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static gboolean gst_ffmpegscale_get_unit_size (GstBaseTransform * trans,
GstCaps * caps, guint * size);
static gboolean gst_ffmpegscale_set_caps (GstBaseTransform * trans,
GstCaps * incaps, GstCaps * outcaps);
static GstFlowReturn gst_ffmpegscale_transform (GstBaseTransform * trans,
GstBuffer * inbuf, GstBuffer * outbuf);
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 gboolean gst_ffmpegscale_handle_src_event (GstPad * pad,
GstEvent * event);
static GstPadLinkReturn
gst_ffmpegscale_pad_link (GstPad * pad, const GstCaps * caps);
static void
gst_ffmpegscale_base_init (gpointer g_class)
{
static GstElementDetails plugin_details = {
"FFMPEG Scale element",
"Filter/Converter/Video",
"Converts video from one resolution to another",
"Luca Ognibene <luogni@tin.it>",
};
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
static void gst_ffmpegscale_chain (GstPad * pad, GstData * data);
static GstStateChangeReturn gst_ffmpegscale_change_state (GstElement * element,
GstStateChange transition);
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 (element_class, &plugin_details);
}
static GstElementClass *parent_class = NULL;
static void
gst_ffmpegscale_class_init (GstFFMpegScaleClass * klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
GstBaseTransformClass *trans_class = GST_BASE_TRANSFORM_CLASS (klass);
/*static guint gst_ffmpegscale_signals[LAST_SIGNAL] = { 0 }; */
gobject_class->finalize = gst_ffmpegscale_finalize;
trans_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_ffmpegscale_transform_caps);
trans_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_ffmpegscale_fixate_caps);
trans_class->get_unit_size =
GST_DEBUG_FUNCPTR (gst_ffmpegscale_get_unit_size);
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_ffmpegscale_set_caps);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_ffmpegscale_transform);
trans_class->passthrough_on_same_caps = TRUE;
}
static void
gst_ffmpegscale_init (GstFFMpegScale * scale, GstFFMpegScaleClass * klass)
{
GstBaseTransform *trans = GST_BASE_TRANSFORM (scale);
gst_pad_set_event_function (trans->srcpad, gst_ffmpegscale_handle_src_event);
scale->pixfmt = PIX_FMT_NB;
scale->res = NULL;
}
static void
gst_ffmpegscale_finalize (GObject * object)
{
GstFFMpegScale *scale = GST_FFMPEGSCALE (object);
if (scale->res != NULL)
img_resample_close (scale->res);
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static GstCaps *
gst_ffmpegscale_getcaps (GstPad * pad)
gst_ffmpegscale_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps)
{
GstFFMpegScale *filter;
GstCaps *othercaps;
GstCaps *caps;
GstPad *otherpad;
gint i;
filter = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
GstFFMpegScale *scale = GST_FFMPEGSCALE (trans);
GstCaps *retcaps;
int i;
otherpad = (pad == filter->srcpad) ? filter->sinkpad : filter->srcpad;
retcaps = gst_caps_copy (caps);
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);
for (i = 0; i < gst_caps_get_size (retcaps); i++) {
GstStructure *structure = gst_caps_get_structure (retcaps, i);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 16, 4096,
@ -157,34 +176,105 @@ gst_ffmpegscale_getcaps (GstPad * pad)
gst_structure_remove_field (structure, "pixel-aspect-ratio");
}
GST_DEBUG ("getcaps are: %" GST_PTR_FORMAT, caps);
return caps;
return retcaps;
}
static GstPadLinkReturn
gst_ffmpegscale_pad_link (GstPad * pad, const GstCaps * caps)
static void
gst_ffmpegscale_fixate_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstStructure *structure;
GstStructure *instructure = gst_caps_get_structure (caps, 0);
GstStructure *outstructure = gst_caps_get_structure (othercaps, 0);
const GValue *in_par, *out_par;
in_par = gst_structure_get_value (instructure, "pixel-aspect-ratio");
out_par = gst_structure_get_value (outstructure, "pixel-aspect-ratio");
if (in_par && out_par) {
GValue out_ratio = { 0, }; /* w/h of output video */
int in_w, in_h, in_par_n, in_par_d, out_par_n, out_par_d;
int count = 0, w = 0, h = 0, num, den;
/* if both width and height are already fixed, we can't do anything
* about it anymore */
if (gst_structure_get_int (outstructure, "width", &w))
++count;
if (gst_structure_get_int (outstructure, "height", &h))
++count;
if (count == 2) {
GST_DEBUG_OBJECT (trans, "dimensions already set to %dx%d, not fixating",
w, h);
return;
}
gst_structure_get_int (instructure, "width", &in_w);
gst_structure_get_int (instructure, "height", &in_h);
in_par_n = gst_value_get_fraction_numerator (in_par);
in_par_d = gst_value_get_fraction_denominator (in_par);
out_par_n = gst_value_get_fraction_numerator (out_par);
out_par_d = gst_value_get_fraction_denominator (out_par);
g_value_init (&out_ratio, GST_TYPE_FRACTION);
gst_value_set_fraction (&out_ratio, in_w * in_par_n * out_par_d,
in_h * in_par_d * out_par_n);
num = gst_value_get_fraction_numerator (&out_ratio);
den = gst_value_get_fraction_denominator (&out_ratio);
GST_DEBUG_OBJECT (trans,
"scaling input with %dx%d and PAR %d/%d to output PAR %d/%d",
in_w, in_h, in_par_n, in_par_d, out_par_n, out_par_d);
GST_DEBUG_OBJECT (trans, "resulting output should respect ratio of %d/%d",
num, den);
/* now find a width x height that respects this display ratio.
* prefer those that have one of w/h the same as the incoming video
* using wd / hd = num / den */
/* start with same height, because of interlaced video */
/* check hd / den is an integer scale factor, and scale wd with the PAR */
if (in_h % den == 0) {
GST_DEBUG_OBJECT (trans, "keeping video height");
h = in_h;
w = h * num / den;
} else if (in_w % num == 0) {
GST_DEBUG_OBJECT (trans, "keeping video width");
w = in_w;
h = w * den / num;
} else {
GST_DEBUG_OBJECT (trans, "approximating but keeping video height");
h = in_h;
w = h * num / den;
}
GST_DEBUG_OBJECT (trans, "scaling to %dx%d", w, h);
/* now fixate */
gst_structure_fixate_field_nearest_int (outstructure, "width", w);
gst_structure_fixate_field_nearest_int (outstructure, "height", h);
} else {
gint width, height;
if (gst_structure_get_int (instructure, "width", &width)) {
if (gst_structure_has_field (outstructure, "width"))
gst_structure_fixate_field_nearest_int (outstructure, "width", width);
}
if (gst_structure_get_int (instructure, "height", &height)) {
if (gst_structure_has_field (outstructure, "height"))
gst_structure_fixate_field_nearest_int (outstructure, "height", height);
}
}
}
static gboolean
gst_ffmpegscale_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
guint * size)
{
GstStructure *structure = gst_caps_get_structure (caps, 0);
gint width, height;
AVCodecContext *ctx;
GstFFMpegScale *scale;
GstPad *otherpad;
GstPadLinkReturn ret;
int height, width;
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);
if (!gst_structure_get_int (structure, "width", &width))
return FALSE;
if (!gst_structure_get_int (structure, "height", &height))
return FALSE;
ctx = avcodec_alloc_context ();
ctx->width = width;
@ -193,258 +283,120 @@ gst_ffmpegscale_pad_link (GstPad * pad, const GstCaps * caps)
gst_ffmpeg_caps_with_codectype (CODEC_TYPE_VIDEO, caps, ctx);
if (ctx->pix_fmt == PIX_FMT_NB) {
av_free (ctx);
return FALSE;
}
/* we disable ourself here */
return GST_PAD_LINK_REFUSED;
*size = (guint) avpicture_get_size (ctx->pix_fmt, ctx->width, ctx->height);
av_free (ctx);
return TRUE;
}
static gboolean
gst_ffmpegscale_set_caps (GstBaseTransform * trans, GstCaps * incaps,
GstCaps * outcaps)
{
GstFFMpegScale *scale = GST_FFMPEGSCALE (trans);
GstStructure *instructure = gst_caps_get_structure (incaps, 0);
GstStructure *outstructure = gst_caps_get_structure (outcaps, 0);
gint par_num, par_den;
AVCodecContext *ctx;
if (!gst_structure_get_int (instructure, "width", &scale->in_width))
return FALSE;
if (!gst_structure_get_int (instructure, "height", &scale->in_height))
return FALSE;
if (!gst_structure_get_int (outstructure, "width", &scale->out_width))
return FALSE;
if (!gst_structure_get_int (outstructure, "height", &scale->out_height))
return FALSE;
if (gst_structure_get_fraction (instructure, "pixel-aspect-ratio",
&par_num, &par_den)) {
gst_structure_set (outstructure,
"pixel-aspect-ratio", GST_TYPE_FRACTION,
par_num * scale->in_width / scale->out_width,
par_den * scale->in_height / scale->out_height, NULL);
}
ctx = avcodec_alloc_context ();
ctx->width = scale->in_width;
ctx->height = scale->in_height;
ctx->pix_fmt = PIX_FMT_NB;
gst_ffmpeg_caps_with_codectype (CODEC_TYPE_VIDEO, incaps, ctx);
if (ctx->pix_fmt == PIX_FMT_NB) {
av_free (ctx);
return FALSE;
}
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->res = img_resample_init (scale->out_width, scale->out_height,
scale->in_width, scale->in_height);
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;
return TRUE;
}
static GType
gst_ffmpegscale_get_type (void)
static GstFlowReturn
gst_ffmpegscale_transform (GstBaseTransform * trans, GstBuffer * inbuf,
GstBuffer * outbuf)
{
static GType ffmpegscale_type = 0;
GstFFMpegScale *scale = GST_FFMPEGSCALE (trans);
AVPicture in_frame, out_frame;
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,
};
gst_buffer_stamp (outbuf, inbuf);
ffmpegscale_type = g_type_register_static (GST_TYPE_ELEMENT,
"GstFFMpegScale", &ffmpegscale_info, 0);
}
gst_ffmpeg_avpicture_fill (&in_frame,
GST_BUFFER_DATA (inbuf),
scale->pixfmt, scale->in_width, scale->in_height);
return ffmpegscale_type;
gst_ffmpeg_avpicture_fill (&out_frame,
GST_BUFFER_DATA (outbuf),
scale->pixfmt, scale->out_width, scale->out_height);
img_resample (scale->res, &out_frame, &in_frame);
return GST_FLOW_OK;
}
static void
gst_ffmpegscale_base_init (GstFFMpegScaleClass * klass)
static gboolean
gst_ffmpegscale_handle_src_event (GstPad * pad, GstEvent * event)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
GstFFMpegScale *scale = GST_FFMPEGSCALE (gst_pad_get_parent (pad));
GstStructure *structure;
gdouble pointer;
gst_element_class_set_details (element_class, &ffmpegscale_details);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
event =
GST_EVENT (gst_mini_object_make_writable (GST_MINI_OBJECT (event)));
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_and_set_caps (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_stamp (outbuf, (const GstBuffer *) inbuf);
gst_buffer_unref (inbuf);
gst_pad_push (scale->srcpad, GST_DATA (outbuf));
}
static GstStateChangeReturn
gst_ffmpegscale_change_state (GstElement * element, GstStateChange transition)
{
GstFFMpegScale *scale;
scale = GST_FFMPEGSCALE (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
if (scale->res != NULL)
img_resample_close (scale->res);
structure = gst_event_get_structure (event);
if (gst_structure_get_double (structure, "pointer_x", &pointer)) {
gst_structure_set (structure,
"pointer_x", G_TYPE_DOUBLE,
pointer * scale->in_width / scale->out_width, NULL);
}
if (gst_structure_get_double (structure, "pointer_y", &pointer)) {
gst_structure_set (structure,
"pointer_y", G_TYPE_DOUBLE,
pointer * scale->in_height / scale->out_height, NULL);
}
break;
}
if (parent_class->change_state)
return parent_class->change_state (element, transition);
return GST_STATE_CHANGE_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;
}
return gst_pad_event_default (pad, event);
}
gboolean
gst_ffmpegscale_register (GstPlugin * plugin)
{
return gst_element_register (plugin, "ffvideoscale",
GST_RANK_NONE, GST_TYPE_FFMPEGSCALE);
}