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gstreamer/gst/videoscale/gstvideoscale.c

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/* 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 <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);
/* elementfactory information */
static const GstElementDetails video_scale_details =
GST_ELEMENT_DETAILS ("Video scaler",
"Filter/Effect/Video",
"Resizes video",
"Wim Taymans <wim.taymans@chello.be>");
#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_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_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_RGB),
GST_STATIC_CAPS (GST_VIDEO_CAPS_BGR),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("v308")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("AYUV")),
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 ("Y800")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("I420")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_YUV ("YV12")),
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB_16),
GST_STATIC_CAPS (GST_VIDEO_CAPS_RGB_15),
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 ("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)
};
enum
{
GST_VIDEO_SCALE_RGBx = 0,
GST_VIDEO_SCALE_xRGB,
GST_VIDEO_SCALE_BGRx,
GST_VIDEO_SCALE_xBGR,
GST_VIDEO_SCALE_RGBA,
GST_VIDEO_SCALE_ARGB,
GST_VIDEO_SCALE_BGRA,
GST_VIDEO_SCALE_ABGR,
GST_VIDEO_SCALE_RGB,
GST_VIDEO_SCALE_BGR,
GST_VIDEO_SCALE_v308,
GST_VIDEO_SCALE_AYUV,
GST_VIDEO_SCALE_YUY2,
GST_VIDEO_SCALE_YVYU,
GST_VIDEO_SCALE_UYVY,
GST_VIDEO_SCALE_Y,
GST_VIDEO_SCALE_I420,
GST_VIDEO_SCALE_YV12,
GST_VIDEO_SCALE_RGB565,
GST_VIDEO_SCALE_RGB555,
GST_VIDEO_SCALE_GRAY8,
GST_VIDEO_SCALE_GRAY16
};
#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;
if (caps == NULL) {
int i;
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])));
}
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_base_init (gpointer g_class);
static void gst_video_scale_class_init (GstVideoScaleClass * klass);
static void gst_video_scale_init (GstVideoScale * videoscale);
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);
static GstElementClass *parent_class = NULL;
GType
gst_video_scale_get_type (void)
{
static GType video_scale_type = 0;
if (!video_scale_type) {
static const GTypeInfo video_scale_info = {
sizeof (GstVideoScaleClass),
gst_video_scale_base_init,
NULL,
(GClassInitFunc) gst_video_scale_class_init,
NULL,
NULL,
sizeof (GstVideoScale),
0,
(GInstanceInitFunc) gst_video_scale_init,
};
video_scale_type =
g_type_register_static (GST_TYPE_BASE_TRANSFORM, "GstVideoScale",
&video_scale_info, 0);
}
return video_scale_type;
}
static void
gst_video_scale_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_set_details (element_class, &video_scale_details);
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;
GstBaseTransformClass *trans_class;
gobject_class = (GObjectClass *) klass;
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);
trans_class->passthrough_on_same_caps = TRUE;
parent_class = g_type_class_peek_parent (klass);
}
static void
gst_video_scale_init (GstVideoScale * videoscale)
{
gst_base_transform_set_qos_enabled (GST_BASE_TRANSFORM (videoscale), TRUE);
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)
{
GstVideoScale *videoscale;
GstCaps *ret;
GstStructure *structure;
/* this function is always called with a simple caps */
g_return_val_if_fail (GST_CAPS_IS_SIMPLE (caps), NULL);
videoscale = GST_VIDEO_SCALE (trans);
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);
gst_caps_merge_structure (ret, gst_structure_copy (structure));
/* if pixel aspect ratio, make a range of it */
if (gst_structure_get_value (structure, "pixel-aspect-ratio")) {
gst_structure_set (structure,
"pixel-aspect-ratio", GST_TYPE_FRACTION_RANGE, 0, 1, G_MAXINT, 1, NULL);
gst_caps_merge_structure (ret, structure);
} else {
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)
{
int i;
GstCaps *icaps, *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]);
icaps = gst_caps_intersect (caps, scaps);
if (!gst_caps_is_empty (icaps)) {
gst_caps_unref (icaps);
return i;
}
gst_caps_unref (icaps);
}
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_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_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_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;
gboolean ret;
videoscale = GST_VIDEO_SCALE (trans);
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));
/* FIXME: par */
GST_DEBUG_OBJECT (videoscale, "from=%dx%d, size %d -> to=%dx%d, size %d",
videoscale->from_width, videoscale->from_height, videoscale->src_size,
videoscale->to_width, videoscale->to_height, videoscale->dest_size);
done:
return ret;
}
static gboolean
gst_video_scale_get_unit_size (GstBaseTransform * trans, GstCaps * caps,
guint * size)
{
GstVideoScale *videoscale;
gint format, width, height;
VSImage img;
g_assert (size);
videoscale = GST_VIDEO_SCALE (trans);
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;
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");
/* we have both PAR but they might not be fixated */
if (from_par && to_par) {
gint from_w, from_h, from_par_n, from_par_d, to_par_n, to_par_d;
gint count = 0, w = 0, h = 0;
guint 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);
/* fixate the out PAR */
if (!gst_value_is_fixed (to_par)) {
GST_DEBUG_OBJECT (base, "fixating to_par to %dx%d", from_par_n,
from_par_d);
gst_structure_fixate_field_nearest_fraction (outs, "pixel-aspect-ratio",
from_par_n, from_par_d);
}
to_par_n = gst_value_get_fraction_numerator (to_par);
to_par_d = gst_value_get_fraction_denominator (to_par);
/* if both width and height are already fixed, we can't do anything
* about it anymore */
if (gst_structure_get_int (outs, "width", &w))
++count;
if (gst_structure_get_int (outs, "height", &h))
++count;
if (count == 2) {
GST_DEBUG_OBJECT (base, "dimensions already set to %dx%d, not fixating",
w, h);
return;
}
gst_structure_get_int (ins, "width", &from_w);
gst_structure_get_int (ins, "height", &from_h);
if (!gst_video_calculate_display_ratio (&num, &den, from_w, from_h,
from_par_n, from_par_d, to_par_n, to_par_d)) {
GST_ELEMENT_ERROR (base, CORE, NEGOTIATION, (NULL),
("Error calculating the output scaled size - integer overflow"));
return;
}
GST_DEBUG_OBJECT (base,
"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 (base, "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 */
/* if one of the output width or height is fixed, we work from there */
if (h) {
GST_DEBUG_OBJECT (base, "height is fixed,scaling width");
w = (guint) gst_util_uint64_scale_int (h, num, den);
} else if (w) {
GST_DEBUG_OBJECT (base, "width is fixed, scaling height");
h = (guint) gst_util_uint64_scale_int (w, den, num);
} else {
/* none of width or height is fixed, figure out both of them based only on
* the input width and height */
/* check hd / den is an integer scale factor, and scale wd with the PAR */
if (from_h % den == 0) {
GST_DEBUG_OBJECT (base, "keeping video height");
h = from_h;
w = (guint) gst_util_uint64_scale_int (h, num, den);
} else if (from_w % num == 0) {
GST_DEBUG_OBJECT (base, "keeping video width");
w = from_w;
h = (guint) gst_util_uint64_scale_int (w, den, num);
} else {
GST_DEBUG_OBJECT (base, "approximating but keeping video height");
h = from_h;
w = (guint) gst_util_uint64_scale_int (h, num, den);
}
}
GST_DEBUG_OBJECT (base, "scaling to %dx%d", w, h);
/* now fixate */
gst_structure_fixate_field_nearest_int (outs, "width", w);
gst_structure_fixate_field_nearest_int (outs, "height", h);
} else {
gint width, height;
if (gst_structure_get_int (ins, "width", &width)) {
if (gst_structure_has_field (outs, "width")) {
gst_structure_fixate_field_nearest_int (outs, "width", width);
}
}
if (gst_structure_get_int (ins, "height", &height)) {
if (gst_structure_has_field (outs, "height")) {
gst_structure_fixate_field_nearest_int (outs, "height", height);
}
}
}
GST_DEBUG_OBJECT (base, "fixated othercaps to %" GST_PTR_FORMAT, othercaps);
}
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);
if (interlaced) {
}
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;
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:
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:
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:
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;
gboolean ret;
double a;
GstStructure *structure;
videoscale = GST_VIDEO_SCALE (trans);
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;
case GST_EVENT_QOS:
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)
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