mirrors/gstreamer
mirrors/gstreamer
1
1
Fork 0
mirror of https://gitlab.freedesktop.org/gstreamer/gstreamer.git synced 2024-12-20 07:16:55 +00:00
Code Issues 1 Projects Releases Wiki Activity
gstreamer/gst/videoscale/gstvideoscale.c
Sebastian Dröge a6a125e4ba videoscale: Use passthrough mode if width and height are not changed 
It doesn't matter if the PAR changes or not, processing of every pixel
is only necessary when the width or height changes.
2010-05-13 12:17:31 +02:00

1401 lines
46 KiB
C
Raw Blame History

/* 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
* 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.
*/
/**
* SECTION:element-videoscale
* @see_also: videorate, ffmpegcolorspace
*
* This element resizes video frames. By default the element will try to
* negotiate to the same size on the source and sinkpad so that no scaling
* is needed. It is therefore safe to insert this element in a pipeline to
* get more robust behaviour without any cost if no scaling is needed.
*
* This element supports a wide range of color spaces including various YUV and
* RGB formats and is therefore generally able to operate anywhere in a
* pipeline.
*
* <refsect2>
* <title>Example pipelines</title>
* |[
* gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! ffmpegcolorspace ! videoscale ! ximagesink
* ]| Decode an Ogg/Theora and display the video using ximagesink. Since
* ximagesink cannot perform scaling, the video scaling will be performed by
* videoscale when you resize the video window.
* To create the test Ogg/Theora file refer to the documentation of theoraenc.
* |[
* gst-launch -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoscale ! video/x-raw-yuv, width=50 ! xvimagesink
* ]| Decode an Ogg/Theora and display the video using xvimagesink with a width
* of 50.
* </refsect2>
*
* Last reviewed on 2006-03-02 (0.10.4)
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <string.h>
#include <math.h>
#include <gst/video/video.h>
#include <liboil/liboil.h>
#include "gstvideoscale.h"
#include "vs_image.h"
#include "vs_4tap.h"
/* debug variable definition */
GST_DEBUG_CATEGORY (video_scale_debug);
#define DEFAULT_PROP_METHOD GST_VIDEO_SCALE_BILINEAR
enum
{
PROP_0,
PROP_METHOD
/* FILL ME */
};
#undef GST_VIDEO_SIZE_RANGE
#define GST_VIDEO_SIZE_RANGE "(int) [ 1, 32767]"
static GstStaticCaps gst_video_scale_format_caps[] = {
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBA),
GST_STATIC_CAPS (GST_VIDEO_CAPS_ARGB),
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRA),
GST_STATIC_CAPS (GST_VIDEO_CAPS_ABGR),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGBx),
GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB),
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGRx),
GST_STATIC_CAPS (GST_VIDEO_CAPS_xBGR),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y444")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("v308")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB),
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGR),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y42B")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YUY2")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YVYU")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("UYVY")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YV12")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y41B")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB_16),
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB_15),
GST_STATIC_CAPS ("video/x-raw-gray, "
"bpp = 16, "
"depth = 16, "
"endianness = BYTE_ORDER, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", " "framerate = " GST_VIDEO_FPS_RANGE),
GST_STATIC_CAPS ("video/x-raw-gray, "
"bpp = 8, "
"depth = 8, "
"width = " GST_VIDEO_SIZE_RANGE ", "
"height = " GST_VIDEO_SIZE_RANGE ", " "framerate = " GST_VIDEO_FPS_RANGE),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("Y800"))
};
enum
{
GST_VIDEO_SCALE_RGBA = 0,
GST_VIDEO_SCALE_ARGB,
GST_VIDEO_SCALE_BGRA,
GST_VIDEO_SCALE_ABGR,
GST_VIDEO_SCALE_AYUV,
GST_VIDEO_SCALE_RGBx,
GST_VIDEO_SCALE_xRGB,
GST_VIDEO_SCALE_BGRx,
GST_VIDEO_SCALE_xBGR,
GST_VIDEO_SCALE_Y444,
GST_VIDEO_SCALE_v308,
GST_VIDEO_SCALE_RGB,
GST_VIDEO_SCALE_BGR,
GST_VIDEO_SCALE_Y42B,
GST_VIDEO_SCALE_YUY2,
GST_VIDEO_SCALE_YVYU,
GST_VIDEO_SCALE_UYVY,
GST_VIDEO_SCALE_I420,
GST_VIDEO_SCALE_YV12,
GST_VIDEO_SCALE_Y41B,
GST_VIDEO_SCALE_RGB565,
GST_VIDEO_SCALE_RGB555,
GST_VIDEO_SCALE_GRAY16,
GST_VIDEO_SCALE_GRAY8,
GST_VIDEO_SCALE_Y
};
#define GST_TYPE_VIDEO_SCALE_METHOD (gst_video_scale_method_get_type())
static GType
gst_video_scale_method_get_type (void)
{
static GType video_scale_method_type = 0;
static const GEnumValue video_scale_methods[] = {
{GST_VIDEO_SCALE_NEAREST, "Nearest Neighbour", "nearest-neighbour"},
{GST_VIDEO_SCALE_BILINEAR, "Bilinear", "bilinear"},
{GST_VIDEO_SCALE_4TAP, "4-tap", "4-tap"},
{0, NULL, NULL},
};
if (!video_scale_method_type) {
video_scale_method_type =
g_enum_register_static ("GstVideoScaleMethod", video_scale_methods);
}
return video_scale_method_type;
}
static GstCaps *
gst_video_scale_get_capslist (void)
{
static GstCaps *caps = NULL;
static volatile gsize inited = 0;
if (g_once_init_enter (&inited)) {
gint i;
g_assert (caps == NULL);
caps = gst_caps_new_empty ();
for (i = 0; i < G_N_ELEMENTS (gst_video_scale_format_caps); i++)
gst_caps_append (caps,
gst_caps_make_writable
(gst_static_caps_get (&gst_video_scale_format_caps[i])));
g_once_init_leave (&inited, 1);
}
return caps;
}
static GstPadTemplate *
gst_video_scale_src_template_factory (void)
{
return gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
gst_caps_ref (gst_video_scale_get_capslist ()));
}
static GstPadTemplate *
gst_video_scale_sink_template_factory (void)
{
return gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
gst_caps_ref (gst_video_scale_get_capslist ()));
}
static void gst_video_scale_finalize (GstVideoScale * videoscale);
static gboolean gst_video_scale_src_event (GstBaseTransform * trans,
GstEvent * event);
/* base transform vmethods */
static GstCaps *gst_video_scale_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps);
static gboolean gst_video_scale_set_caps (GstBaseTransform * trans,
GstCaps * in, GstCaps * out);
static gboolean gst_video_scale_get_unit_size (GstBaseTransform * trans,
GstCaps * caps, guint * size);
static GstFlowReturn gst_video_scale_transform (GstBaseTransform * trans,
GstBuffer * in, GstBuffer * out);
static void gst_video_scale_fixate_caps (GstBaseTransform * base,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps);
static void gst_video_scale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_video_scale_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
GST_BOILERPLATE (GstVideoScale, gst_video_scale, GstVideoFilter,
GST_TYPE_VIDEO_FILTER);
static void
gst_video_scale_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details_simple (element_class,
"Video scaler", "Filter/Effect/Video",
"Resizes video", "Wim Taymans <wim.taymans@chello.be>");
gst_element_class_add_pad_template (element_class,
gst_video_scale_sink_template_factory ());
gst_element_class_add_pad_template (element_class,
gst_video_scale_src_template_factory ());
}
static void
gst_video_scale_class_init (GstVideoScaleClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
gobject_class->finalize = (GObjectFinalizeFunc) gst_video_scale_finalize;
gobject_class->set_property = gst_video_scale_set_property;
gobject_class->get_property = gst_video_scale_get_property;
g_object_class_install_property (gobject_class, PROP_METHOD,
g_param_spec_enum ("method", "method", "method",
GST_TYPE_VIDEO_SCALE_METHOD, DEFAULT_PROP_METHOD,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
trans_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_video_scale_transform_caps);
trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_video_scale_set_caps);
trans_class->get_unit_size =
GST_DEBUG_FUNCPTR (gst_video_scale_get_unit_size);
trans_class->transform = GST_DEBUG_FUNCPTR (gst_video_scale_transform);
trans_class->fixate_caps = GST_DEBUG_FUNCPTR (gst_video_scale_fixate_caps);
trans_class->src_event = GST_DEBUG_FUNCPTR (gst_video_scale_src_event);
}
static void
gst_video_scale_init (GstVideoScale * videoscale, GstVideoScaleClass * klass)
{
videoscale->tmp_buf = NULL;
videoscale->method = DEFAULT_PROP_METHOD;
}
static void
gst_video_scale_finalize (GstVideoScale * videoscale)
{
if (videoscale->tmp_buf)
g_free (videoscale->tmp_buf);
G_OBJECT_CLASS (parent_class)->finalize (G_OBJECT (videoscale));
}
static void
gst_video_scale_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoScale *vscale = GST_VIDEO_SCALE (object);
switch (prop_id) {
case PROP_METHOD:
GST_OBJECT_LOCK (vscale);
vscale->method = g_value_get_enum (value);
GST_OBJECT_UNLOCK (vscale);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_video_scale_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
GstVideoScale *vscale = GST_VIDEO_SCALE (object);
switch (prop_id) {
case PROP_METHOD:
GST_OBJECT_LOCK (vscale);
g_value_set_enum (value, vscale->method);
GST_OBJECT_UNLOCK (vscale);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstCaps *
gst_video_scale_transform_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps)
{
GstCaps *ret;
GstStructure *structure;
/* this function is always called with a simple caps */
g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), NULL);
ret = gst_caps_copy (caps);
structure = gst_structure_copy (gst_caps_get_structure (ret, 0));
gst_structure_set (structure,
"width", GST_TYPE_INT_RANGE, 1, G_MAXINT,
"height", GST_TYPE_INT_RANGE, 1, G_MAXINT, NULL);
/* if pixel aspect ratio, make a range of it */
if (gst_structure_has_field (structure, "pixel-aspect-ratio")) {
gst_structure_set (structure,
"pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 1, G_MAXINT, G_MAXINT, 1,
NULL);
}
gst_caps_merge_structure (ret, gst_structure_copy (structure));
gst_structure_free (structure);
GST_DEBUG_OBJECT (trans, "returning caps: %" GST_PTR_FORMAT, ret);
return ret;
}
static int
gst_video_scale_get_format (GstCaps * caps)
{
gint i;
GstCaps *scaps;
for (i = 0; i < G_N_ELEMENTS (gst_video_scale_format_caps); i++) {
scaps = gst_static_caps_get (&gst_video_scale_format_caps[i]);
if (gst_caps_can_intersect (caps, scaps)) {
return i;
}
}
return -1;
}
/* calculate the size of a buffer */
static gboolean
gst_video_scale_prepare_size (GstVideoScale * videoscale, gint format,
VSImage * img, gint width, gint height, guint * size)
{
gboolean res = TRUE;
img->width = width;
img->height = height;
switch (format) {
case GST_VIDEO_SCALE_RGBx:
case GST_VIDEO_SCALE_xRGB:
case GST_VIDEO_SCALE_BGRx:
case GST_VIDEO_SCALE_xBGR:
case GST_VIDEO_SCALE_RGBA:
case GST_VIDEO_SCALE_ARGB:
case GST_VIDEO_SCALE_BGRA:
case GST_VIDEO_SCALE_ABGR:
case GST_VIDEO_SCALE_AYUV:
img->stride = img->width * 4;
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_Y444:
img->stride = GST_ROUND_UP_4 (img->width);
*size = img->stride * img->height * 3;
break;
case GST_VIDEO_SCALE_RGB:
case GST_VIDEO_SCALE_BGR:
case GST_VIDEO_SCALE_v308:
img->stride = GST_ROUND_UP_4 (img->width * 3);
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_Y42B:
img->stride = GST_ROUND_UP_4 (img->width);
*size =
(GST_ROUND_UP_4 (img->width) +
GST_ROUND_UP_8 (img->width)) * img->height;
break;
case GST_VIDEO_SCALE_YUY2:
case GST_VIDEO_SCALE_YVYU:
case GST_VIDEO_SCALE_UYVY:
img->stride = GST_ROUND_UP_4 (img->width * 2);
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_Y41B:
img->stride = GST_ROUND_UP_4 (img->width);
*size =
(GST_ROUND_UP_4 (img->width) +
(GST_ROUND_UP_16 (img->width) / 2)) * img->height;
break;
case GST_VIDEO_SCALE_Y:
case GST_VIDEO_SCALE_GRAY8:
img->stride = GST_ROUND_UP_4 (img->width);
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_GRAY16:
img->stride = GST_ROUND_UP_4 (img->width * 2);
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
{
gulong img_u_stride, img_u_height;
img->stride = GST_ROUND_UP_4 (img->width);
img_u_height = GST_ROUND_UP_2 (img->height) / 2;
img_u_stride = GST_ROUND_UP_4 (img->stride / 2);
*size = img->stride * GST_ROUND_UP_2 (img->height) +
2 * img_u_stride * img_u_height;
break;
}
case GST_VIDEO_SCALE_RGB565:
img->stride = GST_ROUND_UP_4 (img->width * 2);
*size = img->stride * img->height;
break;
case GST_VIDEO_SCALE_RGB555:
img->stride = GST_ROUND_UP_4 (img->width * 2);
*size = img->stride * img->height;
break;
default:
goto unknown_format;
}
return res;
/* ERRORS */
unknown_format:
{
GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL),
("Unsupported format %d", videoscale->format));
return FALSE;
}
}
static gboolean
parse_caps (GstCaps * caps, gint * format, gint * width, gint * height,
gboolean * interlaced)
{
gboolean ret;
GstStructure *structure;
structure = gst_caps_get_structure (caps, 0);
ret = gst_structure_get_int (structure, "width", width);
ret &= gst_structure_get_int (structure, "height", height);
if (format)
*format = gst_video_scale_get_format (caps);
if (interlaced) {
*interlaced = FALSE;
gst_structure_get_boolean (structure, "interlaced", interlaced);
}
return ret;
}
static gboolean
gst_video_scale_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (trans);
gboolean ret;
const GstStructure *ins, *outs;
gint from_dar_n, from_dar_d, to_dar_n, to_dar_d;
gint from_par_n, from_par_d, to_par_n, to_par_d;
ret = parse_caps (in, &videoscale->format, &videoscale->from_width,
&videoscale->from_height, &videoscale->interlaced);
ret &=
parse_caps (out, NULL, &videoscale->to_width, &videoscale->to_height,
NULL);
if (!ret)
goto done;
if (!(ret = gst_video_scale_prepare_size (videoscale, videoscale->format,
&videoscale->src, videoscale->from_width, videoscale->from_height,
&videoscale->src_size)))
/* prepare size has posted an error when it returns FALSE */
goto done;
if (!(ret = gst_video_scale_prepare_size (videoscale, videoscale->format,
&videoscale->dest, videoscale->to_width, videoscale->to_height,
&videoscale->dest_size)))
/* prepare size has posted an error when it returns FALSE */
goto done;
if (videoscale->tmp_buf)
g_free (videoscale->tmp_buf);
videoscale->tmp_buf =
g_malloc (videoscale->dest.stride * 4 * (videoscale->interlaced ? 2 : 1));
ins = gst_caps_get_structure (in, 0);
outs = gst_caps_get_structure (out, 0);
if (!gst_structure_get_fraction (ins, "pixel-aspect-ratio", &from_par_n,
&from_par_d))
from_par_n = from_par_d = 1;
if (!gst_structure_get_fraction (outs, "pixel-aspect-ratio", &to_par_n,
&to_par_d))
to_par_n = to_par_d = 1;
if (!gst_util_fraction_multiply (videoscale->from_width,
videoscale->from_height, from_par_n, from_par_d, &from_dar_n,
&from_dar_d)) {
from_dar_n = from_dar_d = -1;
}
if (!gst_util_fraction_multiply (videoscale->to_width, videoscale->to_height,
to_par_n, to_par_d, &to_dar_n, &to_dar_d)) {
to_dar_n = to_dar_d = -1;
}
if (to_dar_n != from_dar_n || to_dar_d != from_dar_d)
GST_WARNING_OBJECT (videoscale, "Can't keep DAR!");
gst_base_transform_set_passthrough (trans,
(videoscale->from_width == videoscale->to_width
&& videoscale->from_height == videoscale->to_height));
GST_DEBUG_OBJECT (videoscale, "from=%dx%d (par=%d/%d dar=%d/%d), size %d "
"-> to=%dx%d (par=%d/%d dar=%d/%d), size %d",
videoscale->from_width, videoscale->from_height, from_par_n, from_par_d,
from_dar_n, from_dar_d, videoscale->src_size, videoscale->to_width,
videoscale->to_height, to_par_n, to_par_d, to_dar_n, to_dar_d,
videoscale->dest_size);
done:
return ret;
}
static gboolean
gst_video_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
guint * size)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (trans);
gint format, width, height;
VSImage img;
g_assert (size);
if (!parse_caps (caps, &format, &width, &height, NULL))
return FALSE;
if (!gst_video_scale_prepare_size (videoscale, format, &img, width, height,
size))
return FALSE;
return TRUE;
}
static void
gst_video_scale_fixate_caps (GstBaseTransform * base, GstPadDirection direction,
GstCaps * caps, GstCaps * othercaps)
{
GstStructure *ins, *outs;
const GValue *from_par, *to_par;
GValue fpar = { 0, }, tpar = {
0,};
g_return_if_fail (gst_caps_is_fixed (caps));
GST_DEBUG_OBJECT (base, "trying to fixate othercaps %" GST_PTR_FORMAT
" based on caps %" GST_PTR_FORMAT, othercaps, caps);
ins = gst_caps_get_structure (caps, 0);
outs = gst_caps_get_structure (othercaps, 0);
from_par = gst_structure_get_value (ins, "pixel-aspect-ratio");
to_par = gst_structure_get_value (outs, "pixel-aspect-ratio");
/* If we're fixating from the sinkpad we always set the PAR and
* assume that missing PAR on the sinkpad means 1/1 and
* missing PAR on the srcpad means undefined
*/
if (direction == GST_PAD_SINK) {
if (!from_par) {
g_value_init (&fpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&fpar, 1, 1);
from_par = &fpar;
}
if (!to_par) {
g_value_init (&tpar, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range_full (&tpar, 1, G_MAXINT, G_MAXINT, 1);
to_par = &tpar;
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 1,
G_MAXINT, G_MAXINT, 1, NULL);
}
} else {
if (!to_par) {
g_value_init (&tpar, GST_TYPE_FRACTION);
gst_value_set_fraction (&tpar, 1, 1);
to_par = &tpar;
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION, 1, 1,
NULL);
}
if (!from_par) {
g_value_init (&fpar, GST_TYPE_FRACTION_RANGE);
gst_value_set_fraction_range_full (&fpar, 1, G_MAXINT, G_MAXINT, 1);
from_par = &fpar;
}
}
/* we have both PAR but they might not be fixated */
{
gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d;
gint w = 0, h = 0;
gint from_dar_n, from_dar_d;
gint num, den;
/* from_par should be fixed */
g_return_if_fail (gst_value_is_fixed (from_par));
from_par_n = gst_value_get_fraction_numerator (from_par);
from_par_d = gst_value_get_fraction_denominator (from_par);
gst_structure_get_int (ins, "width", &from_w);
gst_structure_get_int (ins, "height", &from_h);
/* if both width and height are already fixed, we can't do anything
* about it anymore */
if (gst_structure_get_int (outs, "width", &w)
&& gst_structure_get_int (outs, "height", &h)) {
guint n, d;
GST_DEBUG_OBJECT (base, "dimensions already set to %dx%d, not fixating",
w, h);
if (!gst_value_is_fixed (to_par)) {
if (gst_video_calculate_display_ratio (&n, &d, from_w, from_h,
from_par_n, from_par_d, w, h)) {
GST_DEBUG_OBJECT (base, "fixating to_par to %dx%d", num, den);
if (gst_structure_has_field (outs, "pixel-aspect-ratio"))
gst_structure_fixate_field_nearest_fraction (outs,
"pixel-aspect-ratio", n, d);
else
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
n, d, NULL);
}
}
goto done;
}
/* Calculate input DAR */
if (!gst_util_fraction_multiply (from_w, from_h, from_par_n, from_par_d,
&from_dar_n, &from_dar_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
GST_DEBUG_OBJECT (base, "Input DAR is %d/%d", from_dar_n, from_dar_d);
/* If either width or height are fixed there's not much we
* can do either except choosing a height or width and PAR
* that matches the DAR as good as possible
*/
if (h) {
GstStructure *tmp;
gint set_w, set_par_n, set_par_d;
GST_DEBUG_OBJECT (base, "height is fixed (%d)", h);
/* If the PAR is fixed too, there's not much to do
* except choosing the width that is nearest to the
* width with the same DAR */
if (gst_value_is_fixed (to_par)) {
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
GST_DEBUG_OBJECT (base, "PAR is fixed %d/%d", to_par_n, to_par_d);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
to_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (h, num, den);
gst_structure_fixate_field_nearest_int (outs, "width", w);
goto done;
}
/* The PAR is not fixed and it's quite likely that we can set
* an arbitrary PAR. */
/* Check if we can keep the input width */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
/* Might have failed but try to keep the DAR nonetheless by
* adjusting the PAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, h, set_w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
gst_structure_free (tmp);
goto done;
}
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
/* Check if the adjusted PAR is accepted */
if (set_par_n == to_par_n && set_par_d == to_par_d) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w,
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
NULL);
goto done;
}
/* Otherwise scale the width to the new PAR and check if the
* adjusted with is accepted. If all that fails we can't keep
* the DAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (h, num, den);
gst_structure_fixate_field_nearest_int (outs, "width", w);
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
} else if (w) {
GstStructure *tmp;
gint set_h, set_par_n, set_par_d;
GST_DEBUG_OBJECT (base, "width is fixed (%d)", w);
/* If the PAR is fixed too, there's not much to do
* except choosing the height that is nearest to the
* height with the same DAR */
if (gst_value_is_fixed (to_par)) {
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
GST_DEBUG_OBJECT (base, "PAR is fixed %d/%d", to_par_n, to_par_d);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_d,
to_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
h = (guint) gst_util_uint64_scale_int (w, den, num);
gst_structure_fixate_field_nearest_int (outs, "height", h);
goto done;
}
/* The PAR is not fixed and it's quite likely that we can set
* an arbitrary PAR. */
/* Check if we can keep the input height */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
/* Might have failed but try to keep the DAR nonetheless by
* adjusting the PAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
gst_structure_free (tmp);
goto done;
}
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
/* Check if the adjusted PAR is accepted */
if (set_par_n == to_par_n && set_par_d == to_par_d) {
gst_structure_set (outs, "height", G_TYPE_INT, set_h,
"pixel-aspect-ratio", GST_TYPE_FRACTION, set_par_n, set_par_d,
NULL);
goto done;
}
/* Otherwise scale the height to the new PAR and check if the
* adjusted with is accepted. If all that fails we can't keep
* the DAR */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
h = (guint) gst_util_uint64_scale_int (w, den, num);
gst_structure_fixate_field_nearest_int (outs, "height", h);
gst_structure_set (outs, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
} else if (gst_value_is_fixed (to_par)) {
GstStructure *tmp;
gint set_h, set_w, f_h, f_w;
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
/* Calculate scale factor for the PAR change */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, to_par_n,
to_par_d, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
/* Try to keep the input height (because of interlacing) */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
/* This might have failed but try to scale the width
* to keep the DAR nonetheless */
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
gst_structure_fixate_field_nearest_int (tmp, "width", w);
gst_structure_get_int (tmp, "width", &set_w);
gst_structure_free (tmp);
/* We kept the DAR and the height is nearest to the original height */
if (set_w == w) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
goto done;
}
f_h = set_h;
f_w = set_w;
/* If the former failed, try to keep the input width at least */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
/* This might have failed but try to scale the width
* to keep the DAR nonetheless */
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
gst_structure_fixate_field_nearest_int (tmp, "height", h);
gst_structure_get_int (tmp, "height", &set_h);
gst_structure_free (tmp);
/* We kept the DAR and the width is nearest to the original width */
if (set_h == h) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, NULL);
goto done;
}
/* If all this failed, keep the height that was nearest to the orignal
* height and the nearest possible width. This changes the DAR but
* there's not much else to do here.
*/
gst_structure_set (outs, "width", G_TYPE_INT, f_w, "height", G_TYPE_INT,
f_h, NULL);
goto done;
} else {
GstStructure *tmp;
gint set_h, set_w, set_par_n, set_par_d, tmp2;
/* width, height and PAR are not fixed but passthrough is not possible */
/* First try to keep the height and width as good as possible
* and scale PAR */
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", from_h);
gst_structure_get_int (tmp, "height", &set_h);
gst_structure_fixate_field_nearest_int (tmp, "width", from_w);
gst_structure_get_int (tmp, "width", &set_w);
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_h, set_w,
&to_par_n, &to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
gst_structure_fixate_field_nearest_fraction (tmp, "pixel-aspect-ratio",
to_par_n, to_par_d);
gst_structure_get_fraction (tmp, "pixel-aspect-ratio", &set_par_n,
&set_par_d);
gst_structure_free (tmp);
if (set_par_n == to_par_n && set_par_d == to_par_d) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* Otherwise try to scale width to keep the DAR with the set
* PAR and height */
if (!gst_util_fraction_multiply (from_dar_n, from_dar_d, set_par_d,
set_par_n, &num, &den)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
goto done;
}
w = (guint) gst_util_uint64_scale_int (set_h, num, den);
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "width", w);
gst_structure_get_int (tmp, "width", &tmp2);
gst_structure_free (tmp);
if (tmp2 == w) {
gst_structure_set (outs, "width", G_TYPE_INT, tmp2, "height",
G_TYPE_INT, set_h, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* ... or try the same with the height */
h = (guint) gst_util_uint64_scale_int (set_w, den, num);
tmp = gst_structure_copy (outs);
gst_structure_fixate_field_nearest_int (tmp, "height", h);
gst_structure_get_int (tmp, "height", &tmp2);
gst_structure_free (tmp);
if (tmp2 == h) {
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, tmp2, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
goto done;
}
/* If all fails we can't keep the DAR and take the nearest values
* for everything from the first try */
gst_structure_set (outs, "width", G_TYPE_INT, set_w, "height",
G_TYPE_INT, set_h, "pixel-aspect-ratio", GST_TYPE_FRACTION,
set_par_n, set_par_d, NULL);
}
}
done:
GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps);
if (from_par == &fpar)
g_value_unset (&fpar);
if (to_par == &tpar)
g_value_unset (&tpar);
}
static gboolean
gst_video_scale_prepare_image (gint format, GstBuffer * buf,
VSImage * img, VSImage * img_u, VSImage * img_v, gint step,
gboolean interlaced)
{
gboolean res = TRUE;
switch (format) {
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
img_u->pixels =
GST_BUFFER_DATA (buf) + GST_ROUND_UP_2 (img->height) * img->stride;
img_u->height = GST_ROUND_UP_2 (img->height) / 2;
img_u->width = GST_ROUND_UP_2 (img->width) / 2;
img_u->stride = GST_ROUND_UP_4 (img_u->width);
memcpy (img_v, img_u, sizeof (*img_v));
img_v->pixels = img_u->pixels + img_u->height * img_u->stride;
if (interlaced && step == 1) {
img_v->pixels += img_v->stride;
img_u->pixels += img_u->stride;
}
if (interlaced) {
img_u->height = (img_u->height / 2) + ((step == 0
&& img_u->height % 2 == 1) ? 1 : 0);
img_u->stride *= 2;
img_v->height = (img_v->height / 2) + ((step == 0
&& img_v->height % 2 == 1) ? 1 : 0);
img_v->stride *= 2;
}
break;
case GST_VIDEO_SCALE_Y444:
img_u->pixels =
GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height;
img_u->height = img->height;
img_u->width = img->width;
img_u->stride = img->stride;
memcpy (img_v, img_u, sizeof (*img_v));
img_v->pixels =
GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height * 2;
if (interlaced && step == 1) {
img_v->pixels += img_v->stride;
img_u->pixels += img_u->stride;
}
if (interlaced) {
img_u->height = (img_u->height / 2) + ((step == 0
&& img_u->height % 2 == 1) ? 1 : 0);
img_u->stride *= 2;
img_v->height = (img_v->height / 2) + ((step == 0
&& img_v->height % 2 == 1) ? 1 : 0);
img_v->stride *= 2;
}
break;
case GST_VIDEO_SCALE_Y42B:
img_u->pixels =
GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height;
img_u->height = img->height;
img_u->width = GST_ROUND_UP_2 (img->width) / 2;
img_u->stride = GST_ROUND_UP_8 (img->width) / 2;
memcpy (img_v, img_u, sizeof (*img_v));
img_v->pixels =
GST_BUFFER_DATA (buf) + (GST_ROUND_UP_4 (img->width) +
(GST_ROUND_UP_8 (img->width) / 2)) * img->height;
if (interlaced && step == 1) {
img_v->pixels += img_v->stride;
img_u->pixels += img_u->stride;
}
if (interlaced) {
img_u->height = (img_u->height / 2) + ((step == 0
&& img_u->height % 2 == 1) ? 1 : 0);
img_u->stride *= 2;
img_v->height = (img_v->height / 2) + ((step == 0
&& img_v->height % 2 == 1) ? 1 : 0);
img_v->stride *= 2;
}
break;
case GST_VIDEO_SCALE_Y41B:
img_u->pixels =
GST_BUFFER_DATA (buf) + GST_ROUND_UP_4 (img->width) * img->height;
img_u->height = img->height;
img_u->width = GST_ROUND_UP_4 (img->width) / 4;
img_u->stride = GST_ROUND_UP_16 (img->width) / 4;
memcpy (img_v, img_u, sizeof (*img_v));
img_v->pixels =
GST_BUFFER_DATA (buf) + (GST_ROUND_UP_4 (img->width) +
(GST_ROUND_UP_16 (img->width) / 4)) * img->height;
if (interlaced && step == 1) {
img_v->pixels += img_v->stride;
img_u->pixels += img_u->stride;
}
if (interlaced) {
img_u->height = (img_u->height / 2) + ((step == 0
&& img_u->height % 2 == 1) ? 1 : 0);
img_u->stride *= 2;
img_v->height = (img_v->height / 2) + ((step == 0
&& img_v->height % 2 == 1) ? 1 : 0);
img_v->stride *= 2;
}
break;
default:
break;
}
return res;
}
static GstFlowReturn
gst_video_scale_transform (GstBaseTransform * trans, GstBuffer * in,
GstBuffer * out)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (trans);
GstFlowReturn ret = GST_FLOW_OK;
VSImage dest = videoscale->dest;
VSImage src = videoscale->src;
VSImage dest_u = { NULL, };
VSImage dest_v = { NULL, };
VSImage src_u = { NULL, };
VSImage src_v = { NULL, };
gint method;
gint step;
gboolean interlaced = videoscale->interlaced;
GST_OBJECT_LOCK (videoscale);
method = videoscale->method;
GST_OBJECT_UNLOCK (videoscale);
src.pixels = GST_BUFFER_DATA (in);
dest.pixels = GST_BUFFER_DATA (out);
/* For interlaced content we have to run two times with half height
* and doubled stride */
if (interlaced) {
dest.height /= 2;
src.height /= 2;
dest.stride *= 2;
src.stride *= 2;
}
if (src.height < 4 && method == GST_VIDEO_SCALE_4TAP)
method = GST_VIDEO_SCALE_BILINEAR;
for (step = 0; step < (interlaced ? 2 : 1); step++) {
gst_video_scale_prepare_image (videoscale->format, in, &videoscale->src,
&src_u, &src_v, step, interlaced);
gst_video_scale_prepare_image (videoscale->format, out, &videoscale->dest,
&dest_u, &dest_v, step, interlaced);
if (step == 0 && interlaced) {
if (videoscale->from_height % 2 == 1) {
src.height += 1;
}
if (videoscale->to_height % 2 == 1) {
dest.height += 1;
}
} else if (step == 1 && interlaced) {
if (videoscale->from_height % 2 == 1) {
src.height -= 1;
}
if (videoscale->to_height % 2 == 1) {
dest.height -= 1;
}
src.pixels += (src.stride / 2);
dest.pixels += (dest.stride / 2);
}
switch (method) {
case GST_VIDEO_SCALE_NEAREST:
GST_LOG_OBJECT (videoscale, "doing nearest scaling");
switch (videoscale->format) {
case GST_VIDEO_SCALE_RGBx:
case GST_VIDEO_SCALE_xRGB:
case GST_VIDEO_SCALE_BGRx:
case GST_VIDEO_SCALE_xBGR:
case GST_VIDEO_SCALE_RGBA:
case GST_VIDEO_SCALE_ARGB:
case GST_VIDEO_SCALE_BGRA:
case GST_VIDEO_SCALE_ABGR:
case GST_VIDEO_SCALE_AYUV:
vs_image_scale_nearest_RGBA (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB:
case GST_VIDEO_SCALE_BGR:
case GST_VIDEO_SCALE_v308:
vs_image_scale_nearest_RGB (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_YUY2:
case GST_VIDEO_SCALE_YVYU:
vs_image_scale_nearest_YUYV (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_UYVY:
vs_image_scale_nearest_UYVY (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_Y:
case GST_VIDEO_SCALE_GRAY8:
vs_image_scale_nearest_Y (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_GRAY16:
vs_image_scale_nearest_Y16 (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
case GST_VIDEO_SCALE_Y444:
case GST_VIDEO_SCALE_Y42B:
case GST_VIDEO_SCALE_Y41B:
vs_image_scale_nearest_Y (&dest, &src, videoscale->tmp_buf);
vs_image_scale_nearest_Y (&dest_u, &src_u, videoscale->tmp_buf);
vs_image_scale_nearest_Y (&dest_v, &src_v, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB565:
vs_image_scale_nearest_RGB565 (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB555:
vs_image_scale_nearest_RGB555 (&dest, &src, videoscale->tmp_buf);
break;
default:
goto unsupported;
}
break;
case GST_VIDEO_SCALE_BILINEAR:
GST_LOG_OBJECT (videoscale, "doing bilinear scaling");
switch (videoscale->format) {
case GST_VIDEO_SCALE_RGBx:
case GST_VIDEO_SCALE_xRGB:
case GST_VIDEO_SCALE_BGRx:
case GST_VIDEO_SCALE_xBGR:
case GST_VIDEO_SCALE_RGBA:
case GST_VIDEO_SCALE_ARGB:
case GST_VIDEO_SCALE_BGRA:
case GST_VIDEO_SCALE_ABGR:
case GST_VIDEO_SCALE_AYUV:
vs_image_scale_linear_RGBA (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB:
case GST_VIDEO_SCALE_BGR:
case GST_VIDEO_SCALE_v308:
vs_image_scale_linear_RGB (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_YUY2:
case GST_VIDEO_SCALE_YVYU:
vs_image_scale_linear_YUYV (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_UYVY:
vs_image_scale_linear_UYVY (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_Y:
case GST_VIDEO_SCALE_GRAY8:
vs_image_scale_linear_Y (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_GRAY16:
vs_image_scale_linear_Y16 (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
case GST_VIDEO_SCALE_Y444:
case GST_VIDEO_SCALE_Y42B:
case GST_VIDEO_SCALE_Y41B:
vs_image_scale_linear_Y (&dest, &src, videoscale->tmp_buf);
vs_image_scale_linear_Y (&dest_u, &src_u, videoscale->tmp_buf);
vs_image_scale_linear_Y (&dest_v, &src_v, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB565:
vs_image_scale_linear_RGB565 (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB555:
vs_image_scale_linear_RGB555 (&dest, &src, videoscale->tmp_buf);
break;
default:
goto unsupported;
}
break;
case GST_VIDEO_SCALE_4TAP:
GST_LOG_OBJECT (videoscale, "doing 4tap scaling");
switch (videoscale->format) {
case GST_VIDEO_SCALE_RGBx:
case GST_VIDEO_SCALE_xRGB:
case GST_VIDEO_SCALE_BGRx:
case GST_VIDEO_SCALE_xBGR:
case GST_VIDEO_SCALE_RGBA:
case GST_VIDEO_SCALE_ARGB:
case GST_VIDEO_SCALE_BGRA:
case GST_VIDEO_SCALE_ABGR:
case GST_VIDEO_SCALE_AYUV:
vs_image_scale_4tap_RGBA (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB:
case GST_VIDEO_SCALE_BGR:
case GST_VIDEO_SCALE_v308:
vs_image_scale_4tap_RGB (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_YUY2:
case GST_VIDEO_SCALE_YVYU:
vs_image_scale_4tap_YUYV (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_UYVY:
vs_image_scale_4tap_UYVY (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_Y:
case GST_VIDEO_SCALE_GRAY8:
vs_image_scale_4tap_Y (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_GRAY16:
vs_image_scale_4tap_Y16 (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_I420:
case GST_VIDEO_SCALE_YV12:
case GST_VIDEO_SCALE_Y444:
case GST_VIDEO_SCALE_Y42B:
case GST_VIDEO_SCALE_Y41B:
vs_image_scale_4tap_Y (&dest, &src, videoscale->tmp_buf);
vs_image_scale_4tap_Y (&dest_u, &src_u, videoscale->tmp_buf);
vs_image_scale_4tap_Y (&dest_v, &src_v, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB565:
vs_image_scale_4tap_RGB565 (&dest, &src, videoscale->tmp_buf);
break;
case GST_VIDEO_SCALE_RGB555:
vs_image_scale_4tap_RGB555 (&dest, &src, videoscale->tmp_buf);
break;
default:
goto unsupported;
}
break;
default:
goto unknown_mode;
}
}
GST_LOG_OBJECT (videoscale, "pushing buffer of %d bytes",
GST_BUFFER_SIZE (out));
return ret;
/* ERRORS */
unsupported:
{
GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL),
("Unsupported format %d for scaling method %d",
videoscale->format, method));
return GST_FLOW_ERROR;
}
unknown_mode:
{
GST_ELEMENT_ERROR (videoscale, STREAM, NOT_IMPLEMENTED, (NULL),
("Unknown scaling method %d", videoscale->method));
return GST_FLOW_ERROR;
}
}
static gboolean
gst_video_scale_src_event (GstBaseTransform * trans, GstEvent * event)
{
GstVideoScale *videoscale = GST_VIDEO_SCALE (trans);
gboolean ret;
gdouble a;
GstStructure *structure;
GST_DEBUG_OBJECT (videoscale, "handling %s event",
GST_EVENT_TYPE_NAME (event));
switch (GST_EVENT_TYPE (event)) {
case GST_EVENT_NAVIGATION:
event =
GST_EVENT (gst_mini_object_make_writable (GST_MINI_OBJECT (event)));
structure = (GstStructure *) gst_event_get_structure (event);
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);
}
break;
default:
break;
}
ret = GST_BASE_TRANSFORM_CLASS (parent_class)->src_event (trans, event);
return ret;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
oil_init ();
if (!gst_element_register (plugin, "videoscale", GST_RANK_NONE,
GST_TYPE_VIDEO_SCALE))
return FALSE;
GST_DEBUG_CATEGORY_INIT (video_scale_debug, "videoscale", 0,
"videoscale element");
vs_4tap_init ();
return TRUE;
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoscale",
"Resizes video", plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME,
GST_PACKAGE_ORIGIN)
Reference in a new issue View git blame Copy permalink