gstreamer/gst/videoconvert/gstvideoconvert.c
2012-02-22 12:32:44 +01:00

451 lines
13 KiB
C

/* GStreamer
* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
* This file:
* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
* Copyright (C) 2010 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-videoconvert
*
* Convert video frames between a great variety of video formats.
*
* <refsect2>
* <title>Example launch line</title>
* |[
* gst-launch -v videotestsrc ! video/x-raw,format=\(fourcc\)YUY2 ! videoconvert ! ximagesink
* ]|
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "gstvideoconvert.h"
#include <gst/video/video.h>
#include <gst/video/gstvideometa.h>
#include <gst/video/gstvideopool.h>
#include <string.h>
GST_DEBUG_CATEGORY (videoconvert_debug);
#define GST_CAT_DEFAULT videoconvert_debug
GST_DEBUG_CATEGORY_EXTERN (GST_CAT_PERFORMANCE);
enum
{
PROP_0,
PROP_DITHER
};
#define CSP_VIDEO_CAPS GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL)
static GstStaticPadTemplate gst_video_convert_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (CSP_VIDEO_CAPS)
);
static GstStaticPadTemplate gst_video_convert_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS (CSP_VIDEO_CAPS)
);
GType gst_video_convert_get_type (void);
static void gst_video_convert_set_property (GObject * object,
guint property_id, const GValue * value, GParamSpec * pspec);
static void gst_video_convert_get_property (GObject * object,
guint property_id, GValue * value, GParamSpec * pspec);
static gboolean gst_video_convert_set_info (GstVideoFilter * filter,
GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
GstVideoInfo * out_info);
static GstFlowReturn gst_video_convert_transform_frame (GstVideoFilter * filter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame);
static GType
dither_method_get_type (void)
{
static GType gtype = 0;
if (gtype == 0) {
static const GEnumValue values[] = {
{DITHER_NONE, "No dithering (default)", "none"},
{DITHER_VERTERR, "Vertical error propogation", "verterr"},
{DITHER_HALFTONE, "Half-tone", "halftone"},
{0, NULL, NULL}
};
gtype = g_enum_register_static ("GstColorspaceDitherMethod", values);
}
return gtype;
}
/* copies the given caps */
static GstCaps *
gst_video_convert_caps_remove_format_info (GstCaps * caps)
{
GstStructure *st;
gint i, n;
GstCaps *res;
res = gst_caps_new_empty ();
n = gst_caps_get_size (caps);
for (i = 0; i < n; i++) {
st = gst_caps_get_structure (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure (res, st))
continue;
st = gst_structure_copy (st);
gst_structure_remove_fields (st, "format", "palette_data",
"colorimetry", "chroma-site", NULL);
gst_caps_append_structure (res, st);
}
return res;
}
static GstCaps *
gst_video_convert_fixate_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstStructure *ss, *ds;
const gchar *val;
othercaps = gst_caps_make_writable (othercaps);
GST_DEBUG_OBJECT (trans, "fixating caps %" GST_PTR_FORMAT, othercaps);
ss = gst_caps_get_structure (caps, 0);
ds = gst_caps_get_structure (othercaps, 0);
/* first try to preserve chroma-site and colorimetry */
if ((val = gst_structure_get_string (ss, "chroma-site"))) {
if (gst_structure_has_field (ds, "chroma-site"))
gst_structure_fixate_field_string (ds, "chroma-site", val);
else
gst_structure_set (ds, "chroma-site", G_TYPE_STRING, val, NULL);
}
if ((val = gst_structure_get_string (ss, "colorimetry"))) {
if (gst_structure_has_field (ds, "colorimetry"))
gst_structure_fixate_field_string (ds, "colorimetry", val);
else
gst_structure_set (ds, "colorimetry", G_TYPE_STRING, val, NULL);
}
/* fixate remaining fields */
gst_caps_fixate (othercaps);
return othercaps;
}
/* The caps can be transformed into any other caps with format info removed.
* However, we should prefer passthrough, so if passthrough is possible,
* put it first in the list. */
static GstCaps *
gst_video_convert_transform_caps (GstBaseTransform * btrans,
GstPadDirection direction, GstCaps * caps, GstCaps * filter)
{
GstCaps *tmp, *tmp2;
GstCaps *result;
/* Get all possible caps that we can transform to */
tmp = gst_video_convert_caps_remove_format_info (caps);
if (filter) {
tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
gst_caps_unref (tmp);
tmp = tmp2;
}
result = tmp;
GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %"
GST_PTR_FORMAT, caps, result);
return result;
}
static gboolean
gst_video_convert_set_info (GstVideoFilter * filter,
GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
GstVideoInfo * out_info)
{
GstVideoConvert *space;
ColorSpaceColorSpec in_spec, out_spec;
gboolean interlaced;
space = GST_VIDEO_CONVERT_CAST (filter);
if (space->convert) {
videoconvert_convert_free (space->convert);
}
/* input caps */
if (GST_VIDEO_INFO_IS_RGB (in_info)) {
in_spec = COLOR_SPEC_RGB;
} else if (GST_VIDEO_INFO_IS_YUV (in_info)) {
if (in_info->colorimetry.matrix == GST_VIDEO_COLOR_MATRIX_BT709)
in_spec = COLOR_SPEC_YUV_BT709;
else
in_spec = COLOR_SPEC_YUV_BT470_6;
} else {
in_spec = COLOR_SPEC_GRAY;
}
/* output caps */
if (GST_VIDEO_INFO_IS_RGB (out_info)) {
out_spec = COLOR_SPEC_RGB;
} else if (GST_VIDEO_INFO_IS_YUV (out_info)) {
if (out_info->colorimetry.matrix == GST_VIDEO_COLOR_MATRIX_BT709)
out_spec = COLOR_SPEC_YUV_BT709;
else
out_spec = COLOR_SPEC_YUV_BT470_6;
} else {
out_spec = COLOR_SPEC_GRAY;
}
/* these must match */
if (in_info->width != out_info->width || in_info->height != out_info->height
|| in_info->fps_n != out_info->fps_n || in_info->fps_d != out_info->fps_d)
goto format_mismatch;
/* if present, these must match too */
if (in_info->par_n != out_info->par_n || in_info->par_d != out_info->par_d)
goto format_mismatch;
/* if present, these must match too */
if ((in_info->flags & GST_VIDEO_FLAG_INTERLACED) !=
(out_info->flags & GST_VIDEO_FLAG_INTERLACED))
goto format_mismatch;
space->from_spec = in_spec;
space->to_spec = out_spec;
interlaced = (in_info->flags & GST_VIDEO_FLAG_INTERLACED) != 0;
space->convert =
videoconvert_convert_new (GST_VIDEO_INFO_FORMAT (out_info), out_spec,
GST_VIDEO_INFO_FORMAT (in_info), in_spec, in_info->width,
in_info->height);
if (space->convert == NULL)
goto no_convert;
videoconvert_convert_set_interlaced (space->convert, interlaced);
/* palette, only for from data */
if (GST_VIDEO_INFO_FORMAT (in_info) ==
GST_VIDEO_FORMAT_RGB8_PALETTED
&& GST_VIDEO_INFO_FORMAT (out_info) == GST_VIDEO_FORMAT_RGB8_PALETTED) {
goto format_mismatch;
} else if (GST_VIDEO_INFO_FORMAT (in_info) == GST_VIDEO_FORMAT_RGB8_PALETTED) {
GstBuffer *palette;
GstMapInfo map;
palette = gst_video_parse_caps_palette (incaps);
if (!palette || gst_buffer_get_size (palette) < 256 * 4) {
if (palette)
gst_buffer_unref (palette);
goto invalid_palette;
}
gst_buffer_map (palette, &map, GST_MAP_READ);
videoconvert_convert_set_palette (space->convert, (guint32 *) map.data);
gst_buffer_unmap (palette, &map);
gst_buffer_unref (palette);
} else if (GST_VIDEO_INFO_FORMAT (out_info) == GST_VIDEO_FORMAT_RGB8_PALETTED) {
const guint32 *palette;
GstBuffer *p_buf;
palette = videoconvert_convert_get_palette (space->convert);
p_buf = gst_buffer_new_and_alloc (256 * 4);
gst_buffer_fill (p_buf, 0, palette, 256 * 4);
gst_caps_set_simple (outcaps, "palette_data", GST_TYPE_BUFFER, p_buf, NULL);
gst_buffer_unref (p_buf);
}
GST_DEBUG ("reconfigured %d %d", GST_VIDEO_INFO_FORMAT (in_info),
GST_VIDEO_INFO_FORMAT (out_info));
return TRUE;
/* ERRORS */
format_mismatch:
{
GST_ERROR_OBJECT (space, "input and output formats do not match");
return FALSE;
}
no_convert:
{
GST_ERROR_OBJECT (space, "could not create converter");
return FALSE;
}
invalid_palette:
{
GST_ERROR_OBJECT (space, "invalid palette");
return FALSE;
}
}
#define gst_video_convert_parent_class parent_class
G_DEFINE_TYPE (GstVideoConvert, gst_video_convert, GST_TYPE_VIDEO_FILTER);
static void
gst_video_convert_finalize (GObject * obj)
{
GstVideoConvert *space = GST_VIDEO_CONVERT (obj);
if (space->convert) {
videoconvert_convert_free (space->convert);
}
G_OBJECT_CLASS (parent_class)->finalize (obj);
}
static void
gst_video_convert_class_init (GstVideoConvertClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBaseTransformClass *gstbasetransform_class =
(GstBaseTransformClass *) klass;
GstVideoFilterClass *gstvideofilter_class = (GstVideoFilterClass *) klass;
gobject_class->set_property = gst_video_convert_set_property;
gobject_class->get_property = gst_video_convert_get_property;
gobject_class->finalize = gst_video_convert_finalize;
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_video_convert_src_template));
gst_element_class_add_pad_template (gstelement_class,
gst_static_pad_template_get (&gst_video_convert_sink_template));
gst_element_class_set_details_simple (gstelement_class,
" Colorspace converter", "Filter/Converter/Video",
"Converts video from one colorspace to another",
"GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
gstbasetransform_class->transform_caps =
GST_DEBUG_FUNCPTR (gst_video_convert_transform_caps);
gstbasetransform_class->fixate_caps =
GST_DEBUG_FUNCPTR (gst_video_convert_fixate_caps);
gstbasetransform_class->passthrough_on_same_caps = TRUE;
gstvideofilter_class->set_info =
GST_DEBUG_FUNCPTR (gst_video_convert_set_info);
gstvideofilter_class->transform_frame =
GST_DEBUG_FUNCPTR (gst_video_convert_transform_frame);
g_object_class_install_property (gobject_class, PROP_DITHER,
g_param_spec_enum ("dither", "Dither", "Apply dithering while converting",
dither_method_get_type (), DITHER_NONE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_video_convert_init (GstVideoConvert * space)
{
}
void
gst_video_convert_set_property (GObject * object, guint property_id,
const GValue * value, GParamSpec * pspec)
{
GstVideoConvert *csp;
csp = GST_VIDEO_CONVERT (object);
switch (property_id) {
case PROP_DITHER:
csp->dither = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
void
gst_video_convert_get_property (GObject * object, guint property_id,
GValue * value, GParamSpec * pspec)
{
GstVideoConvert *csp;
csp = GST_VIDEO_CONVERT (object);
switch (property_id) {
case PROP_DITHER:
g_value_set_enum (value, csp->dither);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
break;
}
}
static GstFlowReturn
gst_video_convert_transform_frame (GstVideoFilter * filter,
GstVideoFrame * in_frame, GstVideoFrame * out_frame)
{
GstVideoConvert *space;
space = GST_VIDEO_CONVERT_CAST (filter);
GST_CAT_DEBUG_OBJECT (GST_CAT_PERFORMANCE, filter,
"doing colorspace conversion from %s -> to %s",
GST_VIDEO_INFO_NAME (&filter->in_info),
GST_VIDEO_INFO_NAME (&filter->out_info));
videoconvert_convert_set_dither (space->convert, space->dither);
videoconvert_convert_convert (space->convert, out_frame, in_frame);
return GST_FLOW_OK;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (videoconvert_debug, "videoconvert", 0,
"Colorspace Converter");
return gst_element_register (plugin, "videoconvert",
GST_RANK_NONE, GST_TYPE_VIDEO_CONVERT);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
"videoconvert", "Colorspace conversion", plugin_init, VERSION, "LGPL", "",
"")