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gst/videoscale/gstvideoscale.*: Clean up, port to 0.9. Derives from BaseTransform, implements a transform_caps. Remov...

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Original commit message from CVS:
2005-07-01  Andy Wingo  <wingo@pobox.com>

* gst/videoscale/gstvideoscale.c:
* gst/videoscale/gstvideoscale.h: Clean up, port to 0.9. Derives
from BaseTransform, implements a transform_caps. Removed dead code
including some PAR stuff that was never reached -- should probably
be added back somehow.
This commit is contained in:
Andy Wingo 2005-07-01 17:03:13 +00:00
parent 4063477460
commit 5f91e70f0b
3 changed files with 289 additions and 519 deletions
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8
ChangeLog
View file

@ -1,3 +1,11 @@
2005-07-01 Andy Wingo <wingo@pobox.com>
* gst/videoscale/gstvideoscale.c:
* gst/videoscale/gstvideoscale.h: Clean up, port to 0.9. Derives
from BaseTransform, implements a transform_caps. Removed dead code
including some PAR stuff that was never reached -- should probably
be added back somehow.
2005-07-01 Andy Wingo <wingo@pobox.com>
* gst/videoscale: Merge David's work from 0.8 branch. Changes to

774
gst/videoscale/gstvideoscale.c
View file

@ -1,5 +1,6 @@
/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* Copyright (C) 2005 David Schleef <ds@schleef.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
@ -21,13 +22,15 @@
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "gstvideoscale.h"
#include <gst/video/video.h>
#include <string.h>
#include <gst/video/video.h>
#include "gstvideoscale.h"
#include "vs_image.h"
/* debug variable definition */
GST_DEBUG_CATEGORY (videoscale_debug);
@ -38,17 +41,10 @@ GST_ELEMENT_DETAILS ("Video scaler",
"Resizes video",
"Wim Taymans <wim.taymans@chello.be>");
/* GstVideoscale signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
ARG_METHOD
PROP_0,
PROP_METHOD
/* FILL ME */
};
@ -97,7 +93,7 @@ gst_videoscale_method_get_type (void)
static GEnumValue videoscale_methods[] = {
{GST_VIDEOSCALE_POINT_SAMPLE, "0", "Point Sample (not implemented)"},
{GST_VIDEOSCALE_NEAREST, "1", "Nearest"},
{GST_VIDEOSCALE_BILINEAR, "2", "Bilinear (not implemented)"},
{GST_VIDEOSCALE_BILINEAR, "2", "Bilinear"},
{GST_VIDEOSCALE_BICUBIC, "3", "Bicubic (not implemented)"},
{0, NULL, NULL},
};
@ -118,47 +114,51 @@ gst_videoscale_get_capslist (void)
int i;
caps = gst_caps_new_empty ();
for (i = 0; i < G_N_ELEMENTS (gst_videoscale_format_caps); i++) {
for (i = 0; i < G_N_ELEMENTS (gst_videoscale_format_caps); i++)
gst_caps_append (caps,
gst_caps_copy (gst_static_caps_get (&gst_videoscale_format_caps[i])));
}
gst_caps_make_writable
(gst_static_caps_get (&gst_videoscale_format_caps[i])));
}
return gst_caps_copy (caps);
return caps;
}
static GstPadTemplate *
gst_videoscale_src_template_factory (void)
{
return gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_videoscale_get_capslist ());
gst_caps_ref (gst_videoscale_get_capslist ()));
}
static GstPadTemplate *
gst_videoscale_sink_template_factory (void)
{
return gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_videoscale_get_capslist ());
gst_caps_ref (gst_videoscale_get_capslist ()));
}
static void gst_videoscale_base_init (gpointer g_class);
static void gst_videoscale_class_init (GstVideoscaleClass * klass);
static void gst_videoscale_init (GstVideoscale * videoscale);
static gboolean gst_videoscale_handle_src_event (GstPad * pad,
GstEvent * event);
/* base transform */
static GstCaps *gst_videoscale_transform_caps (GstBaseTransform * trans,
GstPad * pad, GstCaps * caps);
static gboolean gst_videoscale_set_caps (GstBaseTransform * trans,
GstCaps * in, GstCaps * out);
static GstFlowReturn gst_videoscale_transform (GstBaseTransform * trans,
GstBuffer * in, GstBuffer ** out);
static void gst_videoscale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_videoscale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_videoscale_finalize (GObject * object);
static void gst_videoscale_chain (GstPad * pad, GstData * _data);
static GstCaps *gst_videoscale_get_capslist (void);
static GstElementClass *parent_class = NULL;
/*static guint gst_videoscale_signals[LAST_SIGNAL] = { 0 }; */
GType
gst_videoscale_get_type (void)
@ -179,7 +179,7 @@ gst_videoscale_get_type (void)
};
videoscale_type =
g_type_register_static (GST_TYPE_ELEMENT, "GstVideoscale",
g_type_register_static (GST_TYPE_BASE_TRANSFORM, "GstVideoscale",
&videoscale_info, 0);
}
return videoscale_type;
@ -197,44 +197,89 @@ gst_videoscale_base_init (gpointer g_class)
gst_element_class_add_pad_template (element_class,
gst_videoscale_src_template_factory ());
}
static void
gst_videoscale_class_init (GstVideoscaleClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseTransformClass *trans_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
trans_class = (GstBaseTransformClass *) klass;
g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_METHOD, g_param_spec_enum ("method", "method", "method", GST_TYPE_VIDEOSCALE_METHOD, 0, G_PARAM_READWRITE)); /* CHECKME! */
parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
gobject_class->finalize = gst_videoscale_finalize;
gobject_class->set_property = gst_videoscale_set_property;
gobject_class->get_property = gst_videoscale_get_property;
g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_METHOD,
g_param_spec_enum ("method", "method", "method",
GST_TYPE_VIDEOSCALE_METHOD, 0, G_PARAM_READWRITE));
trans_class->transform_caps = gst_videoscale_transform_caps;
trans_class->set_caps = gst_videoscale_set_caps;
trans_class->transform = gst_videoscale_transform;
parent_class = g_type_class_peek_parent (klass);
}
static void
gst_videoscale_init (GstVideoscale * videoscale)
{
GstBaseTransform *trans = GST_BASE_TRANSFORM (videoscale);
gst_pad_set_event_function (trans->srcpad, gst_videoscale_handle_src_event);
videoscale->method = GST_VIDEOSCALE_NEAREST;
/*videoscale->method = GST_VIDEOSCALE_BILINEAR; */
/*videoscale->method = GST_VIDEOSCALE_POINT_SAMPLE; */
}
static void
gst_videoscale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoscale *src = GST_VIDEOSCALE (object);
switch (prop_id) {
case PROP_METHOD:
src->method = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_videoscale_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoscale *src = GST_VIDEOSCALE (object);
switch (prop_id) {
case PROP_METHOD:
g_value_set_enum (value, src->method);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstCaps *
gst_videoscale_getcaps (GstPad * pad)
gst_videoscale_transform_caps (GstBaseTransform * trans, GstPad * pad,
GstCaps * caps)
{
GstVideoscale *videoscale;
GstCaps *caps;
GstPad *otherpad;
GstCaps *ret;
int i;
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
videoscale = GST_VIDEOSCALE (trans);
otherpad = (pad == videoscale->srcpad) ? videoscale->sinkpad :
videoscale->srcpad;
caps = gst_pad_get_allowed_caps (otherpad);
ret = gst_caps_make_writable (gst_caps_ref (caps));
GST_DEBUG_OBJECT (pad, "othercaps of otherpad %s:%s are: %" GST_PTR_FORMAT,
GST_DEBUG_PAD_NAME (otherpad), caps);
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 (ret); i++) {
GstStructure *structure = gst_caps_get_structure (ret, i);
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 16, 4096,
@ -242,347 +287,174 @@ gst_videoscale_getcaps (GstPad * pad)
gst_structure_remove_field (structure, "pixel-aspect-ratio");
}
GST_DEBUG_OBJECT (pad, "returning caps: %" GST_PTR_FORMAT, caps);
return caps;
GST_DEBUG_OBJECT (pad, "returning caps: %" GST_PTR_FORMAT, ret);
return ret;
}
static int
gst_videoscale_get_format (const GstCaps * caps)
gst_videoscale_get_format (GstCaps * caps)
{
int i;
GstCaps *icaps;
GstCaps *icaps, *scaps;
for (i = 0; i < G_N_ELEMENTS (gst_videoscale_format_caps); i++) {
icaps = gst_caps_intersect (caps,
gst_static_caps_get (&gst_videoscale_format_caps[i]));
scaps = gst_static_caps_get (&gst_videoscale_format_caps[i]);
icaps = gst_caps_intersect (caps, scaps);
if (!gst_caps_is_empty (icaps)) {
gst_caps_free (icaps);
gst_caps_unref (icaps);
return i;
}
gst_caps_free (icaps);
gst_caps_unref (icaps);
}
return -1;
}
static GstPadLinkReturn
gst_videoscale_link (GstPad * pad, const GstCaps * caps)
{
GstVideoscale *videoscale;
GstPadLinkReturn ret;
GstPad *otherpad;
GstCaps *othercaps, *newcaps;
GstStructure *otherstructure, *structure, *newstructure;
int format;
int height = 0, width = 0, newwidth, newheight;
const GValue *par = NULL, *otherpar;
GST_DEBUG_OBJECT (pad, "_link with caps %" GST_PTR_FORMAT, caps);
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
otherpad = (pad == videoscale->srcpad) ? videoscale->sinkpad :
videoscale->srcpad;
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", &width);
ret &= gst_structure_get_int (structure, "height", &height);
par = gst_structure_get_value (structure, "pixel-aspect-ratio");
format = gst_videoscale_get_format (caps);
if (!ret || format == -1)
return GST_PAD_LINK_REFUSED;
GST_DEBUG_OBJECT (videoscale,
"trying to set caps %" GST_PTR_FORMAT " on pad %s:%s for passthru",
caps, GST_DEBUG_PAD_NAME (otherpad));
ret = gst_pad_try_set_caps (otherpad, caps);
if (GST_PAD_LINK_SUCCESSFUL (ret)) {
/* cool, we can use passthru */
GST_DEBUG_OBJECT (videoscale, "passthru works");
GST_FLAG_SET (videoscale, GST_ELEMENT_WORK_IN_PLACE);
videoscale->passthru = TRUE;
newwidth = width;
newheight = height;
goto beach;
}
GST_FLAG_UNSET (videoscale, GST_ELEMENT_WORK_IN_PLACE);
/* no passthru, so try to convert */
GST_DEBUG_OBJECT (videoscale, "no passthru");
/* copy caps to find which one works for the otherpad */
newcaps = gst_caps_copy (caps);
newstructure = gst_caps_get_structure (newcaps, 0);
/* iterate over other pad's caps, find a nice conversion.
* For calculations, we only use the first because we
* (falsely) assume that all caps have the same PAR and
* size values. */
othercaps = gst_pad_get_allowed_caps (otherpad);
otherstructure = gst_caps_get_structure (othercaps, 0);
otherpar = gst_structure_get_value (otherstructure, "pixel-aspect-ratio");
if (par && otherpar) {
gint num, den, onum, oden;
gboolean keep_h, w_align, h_align, w_inc;
/* otherpar can be a list */
if (G_VALUE_TYPE (otherpar) == GST_TYPE_LIST)
otherpar = gst_value_list_get_value (otherpar, 0);
num = gst_value_get_fraction_numerator (par);
den = gst_value_get_fraction_denominator (par);
onum = gst_value_get_fraction_numerator (otherpar);
oden = gst_value_get_fraction_denominator (otherpar);
w_align = (width * num * oden % (den * onum) == 0);
h_align = (height * den * onum % (num * oden) == 0);
w_inc = (num * oden > den * onum);
/* decide whether to change width or height */
if (w_align && w_inc)
keep_h = TRUE;
else if (h_align && !w_inc)
keep_h = FALSE;
else if (w_align)
keep_h = TRUE;
else if (h_align)
keep_h = FALSE;
else
keep_h = w_inc;
/* take par into effect */
if (keep_h) {
newwidth = width * num / den;
newheight = height;
} else {
newwidth = width;
newheight = height * den / num;
}
} else {
/* (at least) one has no par, so it should accept the other */
newwidth = width;
newheight = height;
}
/* size: don't check return values. We honestly don't care. */
gst_structure_set_value (newstructure, "width",
gst_structure_get_value (otherstructure, "width"));
gst_structure_set_value (newstructure, "height",
gst_structure_get_value (otherstructure, "height"));
gst_caps_structure_fixate_field_nearest_int (newstructure, "width", newwidth);
gst_caps_structure_fixate_field_nearest_int (newstructure,
"height", newheight);
gst_structure_get_int (newstructure, "width", &newwidth);
gst_structure_get_int (newstructure, "height", &newheight);
/* obviously, keep PAR if we got one */
if (otherpar)
gst_structure_set_value (newstructure, "pixel-aspect-ratio", otherpar);
GST_DEBUG_OBJECT (videoscale,
"trying to set caps %" GST_PTR_FORMAT " on pad %s:%s for non-passthru",
caps, GST_DEBUG_PAD_NAME (otherpad));
/* try - bail out if fail */
ret = gst_pad_try_set_caps (otherpad, newcaps);
if (GST_PAD_LINK_FAILED (ret))
return ret;
videoscale->passthru = FALSE;
beach:
/* whee, works. Save for use in _chain and get moving. */
if (pad == videoscale->srcpad) {
videoscale->to_width = width;
videoscale->to_height = height;
videoscale->from_width = newwidth;
videoscale->from_height = newheight;
} else {
videoscale->from_width = width;
videoscale->from_height = height;
videoscale->to_width = newwidth;
videoscale->to_height = newheight;
}
videoscale->format = format;
GST_DEBUG_OBJECT (videoscale, "work completed");
return GST_PAD_LINK_OK;
}
static GstCaps *
gst_videoscale_src_fixate (GstPad * pad, const GstCaps * caps)
{
GstVideoscale *videoscale;
GstCaps *newcaps;
int i;
gboolean ret = TRUE;
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
GST_DEBUG_OBJECT (pad, "asked to fixate caps %" GST_PTR_FORMAT, caps);
/* don't mess with fixation if we don't have a sink pad PAR */
if (!videoscale->from_par) {
GST_DEBUG_OBJECT (videoscale, "no PAR to scale from, not fixating");
return NULL;
}
/* for each structure, if it contains a pixel aspect ratio,
* fix width and height */
newcaps = gst_caps_copy (caps);
for (i = 0; i < gst_caps_get_size (newcaps); i++) {
const GValue *to_par;
GstStructure *structure = gst_caps_get_structure (newcaps, i);
to_par = gst_structure_get_value (structure, "pixel-aspect-ratio");
if (to_par) {
GValue to_ratio = { 0, }; /* w/h of output video */
int from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d;
int count = 0;
int w = 0, h = 0;
int num, den;
/* if both width and height are already fixed, we can't do anything
* about it anymore */
if (gst_structure_get_int (structure, "width", &w))
++count;
if (gst_structure_get_int (structure, "height", &h))
++count;
if (count == 2) {
GST_DEBUG_OBJECT (videoscale,
"dimensions already set to %dx%d, not fixating", w, h);
return NULL;
}
from_w = videoscale->from_width;
from_h = videoscale->from_height;
from_par_n = gst_value_get_fraction_numerator (videoscale->from_par);
from_par_d = gst_value_get_fraction_denominator (videoscale->from_par);
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
g_value_init (&to_ratio, GST_TYPE_FRACTION);
gst_value_set_fraction (&to_ratio, from_w * from_par_n * to_par_d,
from_h * from_par_d * to_par_n);
num = gst_value_get_fraction_numerator (&to_ratio);
den = gst_value_get_fraction_denominator (&to_ratio);
GST_DEBUG_OBJECT (videoscale,
"scaling input with %dx%d and PAR %d/%d to output PAR %d/%d",
from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d);
GST_DEBUG_OBJECT (videoscale,
"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 (from_h % den == 0) {
GST_DEBUG_OBJECT (videoscale, "keeping video height");
h = from_h;
w = h * num / den;
} else if (from_w % num == 0) {
GST_DEBUG_OBJECT (videoscale, "keeping video width");
w = from_w;
h = w * den / num;
} else {
GST_DEBUG_OBJECT (videoscale, "approximating but keeping video height");
h = from_h;
w = h * num / den;
}
GST_DEBUG_OBJECT (videoscale, "scaling to %dx%d", w, h);
/* now fixate */
ret &=
gst_caps_structure_fixate_field_nearest_int (structure, "width", w);
ret &=
gst_caps_structure_fixate_field_nearest_int (structure, "height", h);
}
}
if (ret)
return newcaps;
gst_caps_free (newcaps);
return NULL;
}
static void
gst_videoscale_init (GstVideoscale * videoscale)
{
GST_DEBUG_OBJECT (videoscale, "_init");
videoscale->sinkpad =
gst_pad_new_from_template (gst_videoscale_sink_template_factory (),
"sink");
gst_element_add_pad (GST_ELEMENT (videoscale), videoscale->sinkpad);
gst_pad_set_chain_function (videoscale->sinkpad, gst_videoscale_chain);
gst_pad_set_link_function (videoscale->sinkpad, gst_videoscale_link);
gst_pad_set_getcaps_function (videoscale->sinkpad, gst_videoscale_getcaps);
videoscale->srcpad =
gst_pad_new_from_template (gst_videoscale_src_template_factory (), "src");
gst_element_add_pad (GST_ELEMENT (videoscale), videoscale->srcpad);
gst_pad_set_event_function (videoscale->srcpad,
gst_videoscale_handle_src_event);
gst_pad_set_link_function (videoscale->srcpad, gst_videoscale_link);
gst_pad_set_getcaps_function (videoscale->srcpad, gst_videoscale_getcaps);
gst_pad_set_fixate_function (videoscale->srcpad, gst_videoscale_src_fixate);
videoscale->method = GST_VIDEOSCALE_NEAREST;
/*videoscale->method = GST_VIDEOSCALE_BILINEAR; */
/*videoscale->method = GST_VIDEOSCALE_POINT_SAMPLE; */
}
static gboolean
gst_videoscale_handle_src_event (GstPad * pad, GstEvent * event)
gst_videoscale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
{
GstVideoscale *videoscale;
double a;
gboolean ret;
GstStructure *structure;
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
videoscale = GST_VIDEOSCALE (trans);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
event = GST_EVENT (gst_data_copy_on_write (GST_DATA (event)));
structure = event->event_data.structure.structure;
if (gst_structure_get_double (structure, "pointer_x", &a)) {
gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
a * videoscale->from_width / videoscale->to_width, NULL);
}
if (gst_structure_get_double (structure, "pointer_y", &a)) {
gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
a * videoscale->from_height / videoscale->to_height, NULL);
}
return gst_pad_event_default (pad, event);
break;
default:
GST_DEBUG_OBJECT (videoscale, "passing on non-NAVIGATION event %p",
event);
return gst_pad_event_default (pad, event);
break;
}
structure = gst_caps_get_structure (in, 0);
ret = gst_structure_get_int (structure, "width", &videoscale->from_width);
ret &= gst_structure_get_int (structure, "height", &videoscale->from_height);
structure = gst_caps_get_structure (out, 0);
ret &= gst_structure_get_int (structure, "width", &videoscale->to_width);
ret &= gst_structure_get_int (structure, "height", &videoscale->to_height);
/* fixme: par */
GST_DEBUG_OBJECT (videoscale, "from=%dx%d to=%dx%d",
videoscale->from_width, videoscale->from_height,
videoscale->to_width, videoscale->to_height);
videoscale->format = gst_videoscale_get_format (in);
return ret;
}
#define ROUND_UP_2(x) (((x)+1)&~1)
#define ROUND_UP_4(x) (((x)+3)&~3)
#define ROUND_UP_8(x) (((x)+7)&~7)
static void
gst_videoscale_chain (GstPad * pad, GstData * _data)
/* returns size of output buffer */
static gulong
gst_videoscale_prepare_sizes (GstVideoscale * videoscale, VSImage * src,
VSImage * dest, gboolean reset_source)
{
gulong size = 0;
if (reset_source) {
src->width = videoscale->from_width;
src->height = videoscale->from_height;
}
dest->width = videoscale->to_width;
dest->height = videoscale->to_height;
switch (videoscale->format) {
case GST_VIDEOSCALE_RGBx:
case GST_VIDEOSCALE_xRGB:
case GST_VIDEOSCALE_BGRx:
case GST_VIDEOSCALE_xBGR:
case GST_VIDEOSCALE_AYUV:
src->stride = src->width * 4;
dest->stride = dest->width * 4;
size = dest->stride * dest->height;
break;
case GST_VIDEOSCALE_RGB:
case GST_VIDEOSCALE_BGR:
src->stride = ROUND_UP_4 (src->width * 3);
dest->stride = ROUND_UP_4 (dest->width * 3);
size = dest->stride * dest->height;
break;
case GST_VIDEOSCALE_YUY2:
case GST_VIDEOSCALE_YVYU:
case GST_VIDEOSCALE_UYVY:
src->stride = ROUND_UP_4 (src->width * 2);
dest->stride = ROUND_UP_4 (dest->width * 2);
size = dest->stride * dest->height;
break;
case GST_VIDEOSCALE_Y:
src->stride = ROUND_UP_4 (src->width);
dest->stride = ROUND_UP_4 (dest->width);
size = dest->stride * dest->height;
break;
case GST_VIDEOSCALE_I420:
case GST_VIDEOSCALE_YV12:
{
gulong dest_u_stride;
gulong dest_u_height;
src->stride = ROUND_UP_4 (src->width);
dest->stride = ROUND_UP_4 (dest->width);
dest_u_height = ROUND_UP_2 (dest->height) / 2;
dest_u_stride = ROUND_UP_4 (dest->stride / 2);
size = dest->stride * ROUND_UP_2 (dest->height) +
2 * dest_u_stride * dest_u_height;
break;
}
case GST_VIDEOSCALE_RGB565:
src->stride = ROUND_UP_4 (src->width * 2);
dest->stride = ROUND_UP_4 (dest->width * 2);
size = dest->stride * dest->height;
break;
case GST_VIDEOSCALE_RGB555:
src->stride = ROUND_UP_4 (src->width * 2);
dest->stride = ROUND_UP_4 (dest->width * 2);
size = dest->stride * dest->height;
break;
default:
g_warning ("don't know how to scale");
break;
}
return size;
}
static void
gst_videoscale_prepare_images (GstVideoscale * videoscale, GstBuffer * in,
GstBuffer * out, VSImage * src, VSImage * src_u, VSImage * src_v,
VSImage * dest, VSImage * dest_u, VSImage * dest_v)
{
src->pixels = GST_BUFFER_DATA (in);
dest->pixels = GST_BUFFER_DATA (out);
switch (videoscale->format) {
case GST_VIDEOSCALE_I420:
case GST_VIDEOSCALE_YV12:
src_u->pixels = src->pixels + ROUND_UP_2 (src->height) * src->stride;
src_u->height = ROUND_UP_2 (src->height) / 2;
src_u->width = ROUND_UP_2 (src->width) / 2;
src_u->stride = ROUND_UP_4 (src->stride / 2);
memcpy (src_v, src_u, sizeof (src_v));
src_v->pixels = src_u->pixels + src_u->height * src_u->stride;
dest_u->pixels = dest->pixels + ROUND_UP_2 (dest->height) * dest->stride;
dest_u->height = ROUND_UP_2 (dest->height) / 2;
dest_u->width = ROUND_UP_2 (dest->width) / 2;
dest_u->stride = ROUND_UP_4 (dest->stride / 2);
memcpy (dest_v, dest_u, sizeof (dest_v));
dest_v->pixels = dest_u->pixels + dest_u->height * dest_u->stride;
break;
default:
break;
}
}
static GstFlowReturn
gst_videoscale_transform (GstBaseTransform * trans, GstBuffer * in,
GstBuffer ** out)
{
GstBuffer *buf = GST_BUFFER (_data);
GstVideoscale *videoscale;
GstFlowReturn ret;
gulong size;
GstBuffer *outbuf;
VSImage dest;
VSImage src;
VSImage dest_u;
@ -591,109 +463,28 @@ gst_videoscale_chain (GstPad * pad, GstData * _data)
VSImage src_v;
guint8 *tmpbuf;
g_return_if_fail (pad != NULL);
g_return_if_fail (GST_IS_PAD (pad));
g_return_if_fail (buf != NULL);
videoscale = GST_VIDEOSCALE (trans);
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
/* FIXME: I can't figure out how passthru would work in 0.9 */
if (videoscale->passthru) {
gst_pad_push (videoscale->srcpad, GST_DATA (buf));
return;
size = gst_videoscale_prepare_sizes (videoscale, &src, &dest, TRUE);
if (!size) {
ret = GST_FLOW_UNEXPECTED;
goto done;
}
GST_LOG_OBJECT (videoscale,
"from=%dx%d to=%dx%d",
videoscale->from_width, videoscale->from_height,
videoscale->to_width, videoscale->to_height);
*out = NULL;
ret = gst_pad_alloc_buffer (trans->srcpad,
GST_BUFFER_OFFSET_NONE, size, GST_PAD_CAPS (trans->srcpad), out);
if (ret != GST_FLOW_OK)
goto done;
gst_buffer_stamp (*out, in);
src.pixels = GST_BUFFER_DATA (buf);
src.width = videoscale->from_width;
src.height = videoscale->from_height;
/* output size could have changed, prepare again */
gst_videoscale_prepare_sizes (videoscale, &src, &dest, FALSE);
dest.width = videoscale->to_width;
dest.height = videoscale->to_height;
switch (videoscale->format) {
case GST_VIDEOSCALE_RGBx:
case GST_VIDEOSCALE_xRGB:
case GST_VIDEOSCALE_BGRx:
case GST_VIDEOSCALE_xBGR:
case GST_VIDEOSCALE_AYUV:
src.stride = videoscale->from_width * 4;
dest.stride = videoscale->to_width * 4;
size = dest.stride * dest.height;
break;
case GST_VIDEOSCALE_RGB:
case GST_VIDEOSCALE_BGR:
src.stride = ROUND_UP_4 (videoscale->from_width * 3);
dest.stride = ROUND_UP_4 (videoscale->to_width * 3);
size = dest.stride * dest.height;
break;
case GST_VIDEOSCALE_YUY2:
case GST_VIDEOSCALE_YVYU:
case GST_VIDEOSCALE_UYVY:
src.stride = ROUND_UP_4 (videoscale->from_width * 2);
dest.stride = ROUND_UP_4 (videoscale->to_width * 2);
size = dest.stride * dest.height;
break;
case GST_VIDEOSCALE_Y:
src.stride = ROUND_UP_4 (videoscale->from_width);
dest.stride = ROUND_UP_4 (videoscale->to_width);
size = dest.stride * dest.height;
break;
case GST_VIDEOSCALE_I420:
case GST_VIDEOSCALE_YV12:
src.stride = ROUND_UP_4 (videoscale->from_width);
dest.stride = ROUND_UP_4 (videoscale->to_width);
src_u.pixels = src.pixels + ROUND_UP_2 (src.height) * src.stride;
src_u.height = ROUND_UP_2 (src.height) / 2;
src_u.width = ROUND_UP_2 (src.width) / 2;
src_u.stride = ROUND_UP_4 (src.stride / 2);
dest_u.height = ROUND_UP_2 (dest.height) / 2;
dest_u.width = ROUND_UP_2 (dest.width) / 2;
dest_u.stride = ROUND_UP_4 (dest.stride / 2);
memcpy (&src_v, &src_u, sizeof (src_v));
src_v.pixels = src_u.pixels + src_u.height * src_u.stride;
memcpy (&dest_v, &dest_u, sizeof (dest_v));
size = dest.stride * ROUND_UP_2 (dest.height) +
2 * dest_u.stride * dest_u.height;
break;
case GST_VIDEOSCALE_RGB565:
src.stride = ROUND_UP_4 (videoscale->from_width * 2);
dest.stride = ROUND_UP_4 (videoscale->to_width * 2);
size = dest.stride * dest.height;
break;
case GST_VIDEOSCALE_RGB555:
src.stride = ROUND_UP_4 (videoscale->from_width * 2);
dest.stride = ROUND_UP_4 (videoscale->to_width * 2);
size = dest.stride * dest.height;
break;
default:
g_warning ("don't know how to scale");
gst_buffer_unref (buf);
return;
}
outbuf = gst_pad_alloc_buffer (videoscale->srcpad,
GST_BUFFER_OFFSET_NONE, size);
gst_buffer_stamp (outbuf, buf);
dest.pixels = GST_BUFFER_DATA (outbuf);
switch (videoscale->format) {
case GST_VIDEOSCALE_I420:
case GST_VIDEOSCALE_YV12:
dest_u.pixels = dest.pixels + ROUND_UP_2 (dest.height) * dest.stride;
dest_v.pixels = dest_u.pixels + dest_u.height * dest_u.stride;
break;
default:
break;
}
gst_videoscale_prepare_images (videoscale, in, *out, &src, &src_u, &src_v,
&dest, &dest_u, &dest_v);
tmpbuf = g_malloc (dest.stride * 2);
@ -787,66 +578,41 @@ gst_videoscale_chain (GstPad * pad, GstData * _data)
g_free (tmpbuf);
GST_LOG_OBJECT (videoscale, "pushing buffer of %d bytes",
GST_BUFFER_SIZE (outbuf));
GST_BUFFER_SIZE (*out));
gst_pad_push (videoscale->srcpad, GST_DATA (outbuf));
gst_buffer_unref (buf);
done:
gst_buffer_unref (in);
return ret;
}
static void
gst_videoscale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoscale *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VIDEOSCALE (object));
src = GST_VIDEOSCALE (object);
GST_DEBUG_OBJECT (src, "gst_videoscale_set_property");
switch (prop_id) {
case ARG_METHOD:
src->method = g_value_get_enum (value);
break;
default:
break;
}
}
static void
gst_videoscale_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoscale *src;
/* it's not null if we got it, but it might not be ours */
g_return_if_fail (GST_IS_VIDEOSCALE (object));
src = GST_VIDEOSCALE (object);
switch (prop_id) {
case ARG_METHOD:
g_value_set_enum (value, src->method);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
/* maybe these free's should go in a state change instead;
* in that case, we'd probably also want to clear from/to width/height there. */
static void
gst_videoscale_finalize (GObject * object)
static gboolean
gst_videoscale_handle_src_event (GstPad * pad, GstEvent * event)
{
GstVideoscale *videoscale;
double a;
GstStructure *structure;
videoscale = GST_VIDEOSCALE (object);
videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad));
g_free (videoscale->from_par);
g_free (videoscale->to_par);
G_OBJECT_CLASS (parent_class)->finalize (object);
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
event =
GST_EVENT (gst_mini_object_make_writable (GST_MINI_OBJECT (event)));
structure = event->event_data.structure.structure;
if (gst_structure_get_double (structure, "pointer_x", &a)) {
gst_structure_set (structure, "pointer_x", G_TYPE_DOUBLE,
a * videoscale->from_width / videoscale->to_width, NULL);
}
if (gst_structure_get_double (structure, "pointer_y", &a)) {
gst_structure_set (structure, "pointer_y", G_TYPE_DOUBLE,
a * videoscale->from_height / videoscale->to_height, NULL);
}
return gst_pad_event_default (pad, event);
default:
GST_DEBUG_OBJECT (videoscale, "passing on non-NAVIGATION event %p",
event);
return gst_pad_event_default (pad, event);
}
}
static gboolean

26
gst/videoscale/gstvideoscale.h
View file

@ -23,16 +23,16 @@
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
G_BEGIN_DECLS
/* debugging */
GST_DEBUG_CATEGORY_EXTERN (videoscale_debug);
#define GST_CAT_DEFAULT videoscale_debug
#define GST_TYPE_VIDEOSCALE \
(gst_videoscale_get_type())
#define GST_VIDEOSCALE(obj) \
@ -44,6 +44,7 @@ GST_DEBUG_CATEGORY_EXTERN (videoscale_debug);
#define GST_IS_VIDEOSCALE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VIDEOSCALE))
typedef enum {
GST_VIDEOSCALE_POINT_SAMPLE,
GST_VIDEOSCALE_NEAREST,
@ -51,13 +52,13 @@ typedef enum {
GST_VIDEOSCALE_BICUBIC
} GstVideoScaleMethod;
typedef struct _GstVideoscale GstVideoscale;
typedef struct _GstVideoscaleClass GstVideoscaleClass;
struct _GstVideoscale {
GstElement element;
GstPad *sinkpad,*srcpad;
struct _GstVideoscale {
GstBaseTransform element;
/* video state */
gboolean inited;
@ -66,8 +67,6 @@ struct _GstVideoscale {
gint to_height;
gint from_width;
gint from_height;
GValue *to_par; /* pixel aspect ratio of sink pad */
GValue *from_par; /* pixel aspect ratio of src pad */
gboolean passthru;
float framerate;
@ -78,17 +77,14 @@ struct _GstVideoscale {
};
struct _GstVideoscaleClass {
GstElementClass parent_class;
GstBaseTransformClass parent_class;
};
GType gst_videoscale_get_type(void);
void gst_videoscale_setup(GstVideoscale *);
#define gst_videoscale_scale(scale, src, dest) (scale)->scale_cc((scale), (src), (dest))
#ifdef __cplusplus
}
#endif /* __cplusplus */
G_END_DECLS
#endif /* __GST_VIDEOSCALE_H__ */