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gstreamer/gst/videoconvert/gstvideoconvert.c
Stéphane Cerveau aa230852ba videoconvert: allow per feature registration 
Split plugin into features including
dynamic types which can be indiviually
registered during a static build.

More details here:

https://gitlab.freedesktop.org/gstreamer/gst-build/-/merge_requests/199
https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/661

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/-/merge_requests/1029>
2021-03-16 17:58:59 +00:00

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/* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-videoconvert
* @title: videoconvert
*
* Convert video frames between a great variety of video formats.
*
* ## Example launch line
* |[
* gst-launch-1.0 -v videotestsrc ! video/x-raw,format=YUY2 ! videoconvert ! autovideosink
* ]|
* This will output a test video (generated in YUY2 format) in a video
* window. If the video sink selected does not support YUY2 videoconvert will
* automatically convert the video to a format understood by the video sink.
*
*/
#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_STATIC (CAT_PERFORMANCE);
static GQuark _colorspace_quark;
#define gst_video_convert_parent_class parent_class
G_DEFINE_TYPE (GstVideoConvert, gst_video_convert, GST_TYPE_VIDEO_FILTER);
GST_ELEMENT_REGISTER_DEFINE (videoconvert, "videoconvert",
GST_RANK_NONE, GST_TYPE_VIDEO_CONVERT);
#define DEFAULT_PROP_DITHER GST_VIDEO_DITHER_BAYER
#define DEFAULT_PROP_DITHER_QUANTIZATION 1
#define DEFAULT_PROP_CHROMA_RESAMPLER GST_VIDEO_RESAMPLER_METHOD_LINEAR
#define DEFAULT_PROP_ALPHA_MODE GST_VIDEO_ALPHA_MODE_COPY
#define DEFAULT_PROP_ALPHA_VALUE 1.0
#define DEFAULT_PROP_CHROMA_MODE GST_VIDEO_CHROMA_MODE_FULL
#define DEFAULT_PROP_MATRIX_MODE GST_VIDEO_MATRIX_MODE_FULL
#define DEFAULT_PROP_GAMMA_MODE GST_VIDEO_GAMMA_MODE_NONE
#define DEFAULT_PROP_PRIMARIES_MODE GST_VIDEO_PRIMARIES_MODE_NONE
#define DEFAULT_PROP_N_THREADS 1
enum
{
PROP_0,
PROP_DITHER,
PROP_DITHER_QUANTIZATION,
PROP_CHROMA_RESAMPLER,
PROP_ALPHA_MODE,
PROP_ALPHA_VALUE,
PROP_CHROMA_MODE,
PROP_MATRIX_MODE,
PROP_GAMMA_MODE,
PROP_PRIMARIES_MODE,
PROP_N_THREADS
};
#define CSP_VIDEO_CAPS GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL) ";" \
GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", 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)
);
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 GstCapsFeatures *features_format_interlaced,
*features_format_interlaced_sysmem;
/* copies the given caps */
static GstCaps *
gst_video_convert_caps_remove_format_info (GstCaps * caps)
{
GstStructure *st;
GstCapsFeatures *f;
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);
f = gst_caps_get_features (caps, i);
/* If this is already expressed by the existing caps
* skip this structure */
if (i > 0 && gst_caps_is_subset_structure_full (res, st, f))
continue;
st = gst_structure_copy (st);
/* Only remove format info for the cases when we can actually convert */
if (!gst_caps_features_is_any (f)
&& (gst_caps_features_is_equal (f,
GST_CAPS_FEATURES_MEMORY_SYSTEM_MEMORY)
|| gst_caps_features_is_equal (f, features_format_interlaced)
|| gst_caps_features_is_equal (f,
features_format_interlaced_sysmem))) {
gst_structure_remove_fields (st, "format", "colorimetry", "chroma-site",
NULL);
}
gst_caps_append_structure_full (res, st, gst_caps_features_copy (f));
}
return res;
}
/*
* This is an incomplete matrix of in formats and a score for the preferred output
* format.
*
* out: RGB24 RGB16 ARGB AYUV YUV444 YUV422 YUV420 YUV411 YUV410 PAL GRAY
* in
* RGB24 0 2 1 2 2 3 4 5 6 7 8
* RGB16 1 0 1 2 2 3 4 5 6 7 8
* ARGB 2 3 0 1 4 5 6 7 8 9 10
* AYUV 3 4 1 0 2 5 6 7 8 9 10
* YUV444 2 4 3 1 0 5 6 7 8 9 10
* YUV422 3 5 4 2 1 0 6 7 8 9 10
* YUV420 4 6 5 3 2 1 0 7 8 9 10
* YUV411 4 6 5 3 2 1 7 0 8 9 10
* YUV410 6 8 7 5 4 3 2 1 0 9 10
* PAL 1 3 2 6 4 6 7 8 9 0 10
* GRAY 1 4 3 2 1 5 6 7 8 9 0
*
* PAL or GRAY are never preferred, if we can we would convert to PAL instead
* of GRAY, though
* less subsampling is preferred and if any, preferably horizontal
* We would like to keep the alpha, even if we would need to to colorspace conversion
* or lose depth.
*/
#define SCORE_FORMAT_CHANGE 1
#define SCORE_DEPTH_CHANGE 1
#define SCORE_ALPHA_CHANGE 1
#define SCORE_CHROMA_W_CHANGE 1
#define SCORE_CHROMA_H_CHANGE 1
#define SCORE_PALETTE_CHANGE 1
#define SCORE_COLORSPACE_LOSS 2 /* RGB <-> YUV */
#define SCORE_DEPTH_LOSS 4 /* change bit depth */
#define SCORE_ALPHA_LOSS 8 /* lose the alpha channel */
#define SCORE_CHROMA_W_LOSS 16 /* vertical subsample */
#define SCORE_CHROMA_H_LOSS 32 /* horizontal subsample */
#define SCORE_PALETTE_LOSS 64 /* convert to palette format */
#define SCORE_COLOR_LOSS 128 /* convert to GRAY */
#define COLORSPACE_MASK (GST_VIDEO_FORMAT_FLAG_YUV | \
GST_VIDEO_FORMAT_FLAG_RGB | GST_VIDEO_FORMAT_FLAG_GRAY)
#define ALPHA_MASK (GST_VIDEO_FORMAT_FLAG_ALPHA)
#define PALETTE_MASK (GST_VIDEO_FORMAT_FLAG_PALETTE)
/* calculate how much loss a conversion would be */
static void
score_value (GstBaseTransform * base, const GstVideoFormatInfo * in_info,
const GValue * val, gint * min_loss, const GstVideoFormatInfo ** out_info)
{
const gchar *fname;
const GstVideoFormatInfo *t_info;
GstVideoFormatFlags in_flags, t_flags;
gint loss;
fname = g_value_get_string (val);
t_info = gst_video_format_get_info (gst_video_format_from_string (fname));
if (!t_info)
return;
/* accept input format immediately without loss */
if (in_info == t_info) {
*min_loss = 0;
*out_info = t_info;
return;
}
loss = SCORE_FORMAT_CHANGE;
in_flags = GST_VIDEO_FORMAT_INFO_FLAGS (in_info);
in_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;
in_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;
in_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;
t_flags = GST_VIDEO_FORMAT_INFO_FLAGS (t_info);
t_flags &= ~GST_VIDEO_FORMAT_FLAG_LE;
t_flags &= ~GST_VIDEO_FORMAT_FLAG_COMPLEX;
t_flags &= ~GST_VIDEO_FORMAT_FLAG_UNPACK;
if ((t_flags & PALETTE_MASK) != (in_flags & PALETTE_MASK)) {
loss += SCORE_PALETTE_CHANGE;
if (t_flags & PALETTE_MASK)
loss += SCORE_PALETTE_LOSS;
}
if ((t_flags & COLORSPACE_MASK) != (in_flags & COLORSPACE_MASK)) {
loss += SCORE_COLORSPACE_LOSS;
if (t_flags & GST_VIDEO_FORMAT_FLAG_GRAY)
loss += SCORE_COLOR_LOSS;
}
if ((t_flags & ALPHA_MASK) != (in_flags & ALPHA_MASK)) {
loss += SCORE_ALPHA_CHANGE;
if (in_flags & ALPHA_MASK)
loss += SCORE_ALPHA_LOSS;
}
if ((in_info->h_sub[1]) != (t_info->h_sub[1])) {
loss += SCORE_CHROMA_H_CHANGE;
if ((in_info->h_sub[1]) < (t_info->h_sub[1]))
loss += SCORE_CHROMA_H_LOSS;
}
if ((in_info->w_sub[1]) != (t_info->w_sub[1])) {
loss += SCORE_CHROMA_W_CHANGE;
if ((in_info->w_sub[1]) < (t_info->w_sub[1]))
loss += SCORE_CHROMA_W_LOSS;
}
if ((in_info->bits) != (t_info->bits)) {
loss += SCORE_DEPTH_CHANGE;
if ((in_info->bits) > (t_info->bits))
loss += SCORE_DEPTH_LOSS;
}
GST_DEBUG_OBJECT (base, "score %s -> %s = %d",
GST_VIDEO_FORMAT_INFO_NAME (in_info),
GST_VIDEO_FORMAT_INFO_NAME (t_info), loss);
if (loss < *min_loss) {
GST_DEBUG_OBJECT (base, "found new best %d", loss);
*out_info = t_info;
*min_loss = loss;
}
}
static void
gst_video_convert_fixate_format (GstBaseTransform * base, GstCaps * caps,
GstCaps * result)
{
GstStructure *ins, *outs;
const gchar *in_format;
const GstVideoFormatInfo *in_info, *out_info = NULL;
gint min_loss = G_MAXINT;
guint i, capslen;
ins = gst_caps_get_structure (caps, 0);
in_format = gst_structure_get_string (ins, "format");
if (!in_format)
return;
GST_DEBUG_OBJECT (base, "source format %s", in_format);
in_info =
gst_video_format_get_info (gst_video_format_from_string (in_format));
if (!in_info)
return;
outs = gst_caps_get_structure (result, 0);
capslen = gst_caps_get_size (result);
GST_DEBUG_OBJECT (base, "iterate %d structures", capslen);
for (i = 0; i < capslen; i++) {
GstStructure *tests;
const GValue *format;
tests = gst_caps_get_structure (result, i);
format = gst_structure_get_value (tests, "format");
/* should not happen */
if (format == NULL)
continue;
if (GST_VALUE_HOLDS_LIST (format)) {
gint j, len;
len = gst_value_list_get_size (format);
GST_DEBUG_OBJECT (base, "have %d formats", len);
for (j = 0; j < len; j++) {
const GValue *val;
val = gst_value_list_get_value (format, j);
if (G_VALUE_HOLDS_STRING (val)) {
score_value (base, in_info, val, &min_loss, &out_info);
if (min_loss == 0)
break;
}
}
} else if (G_VALUE_HOLDS_STRING (format)) {
score_value (base, in_info, format, &min_loss, &out_info);
}
}
if (out_info)
gst_structure_set (outs, "format", G_TYPE_STRING,
GST_VIDEO_FORMAT_INFO_NAME (out_info), NULL);
}
static gboolean
subsampling_unchanged (GstVideoInfo * in_info, GstVideoInfo * out_info)
{
gint i;
const GstVideoFormatInfo *in_format, *out_format;
if (GST_VIDEO_INFO_N_COMPONENTS (in_info) !=
GST_VIDEO_INFO_N_COMPONENTS (out_info))
return FALSE;
in_format = in_info->finfo;
out_format = out_info->finfo;
for (i = 0; i < GST_VIDEO_INFO_N_COMPONENTS (in_info); i++) {
if (GST_VIDEO_FORMAT_INFO_W_SUB (in_format,
i) != GST_VIDEO_FORMAT_INFO_W_SUB (out_format, i))
return FALSE;
if (GST_VIDEO_FORMAT_INFO_H_SUB (in_format,
i) != GST_VIDEO_FORMAT_INFO_H_SUB (out_format, i))
return FALSE;
}
return TRUE;
}
static void
transfer_colorimetry_from_input (GstBaseTransform * trans, GstCaps * in_caps,
GstCaps * out_caps)
{
GstStructure *out_caps_s = gst_caps_get_structure (out_caps, 0);
GstStructure *in_caps_s = gst_caps_get_structure (in_caps, 0);
gboolean have_colorimetry =
gst_structure_has_field (out_caps_s, "colorimetry");
gboolean have_chroma_site =
gst_structure_has_field (out_caps_s, "chroma-site");
/* If the output already has colorimetry and chroma-site, stop,
* otherwise try and transfer what we can from the input caps */
if (have_colorimetry && have_chroma_site)
return;
{
GstVideoInfo in_info, out_info;
const GValue *in_colorimetry =
gst_structure_get_value (in_caps_s, "colorimetry");
if (!gst_video_info_from_caps (&in_info, in_caps)) {
GST_WARNING_OBJECT (trans,
"Failed to convert sink pad caps to video info");
return;
}
if (!gst_video_info_from_caps (&out_info, out_caps)) {
GST_WARNING_OBJECT (trans,
"Failed to convert src pad caps to video info");
return;
}
if (!have_colorimetry && in_colorimetry != NULL) {
if ((GST_VIDEO_INFO_IS_YUV (&out_info)
&& GST_VIDEO_INFO_IS_YUV (&in_info))
|| (GST_VIDEO_INFO_IS_RGB (&out_info)
&& GST_VIDEO_INFO_IS_RGB (&in_info))
|| (GST_VIDEO_INFO_IS_GRAY (&out_info)
&& GST_VIDEO_INFO_IS_GRAY (&in_info))) {
/* Can transfer the colorimetry intact from the input if it has it */
gst_structure_set_value (out_caps_s, "colorimetry", in_colorimetry);
} else {
gchar *colorimetry_str;
/* Changing between YUV/RGB - forward primaries and transfer function, but use
* default range and matrix.
* the primaries is used for conversion between RGB and XYZ (CIE 1931 coordinate).
* the transfer function could be another reference (e.g., HDR)
*/
out_info.colorimetry.primaries = in_info.colorimetry.primaries;
out_info.colorimetry.transfer = in_info.colorimetry.transfer;
colorimetry_str =
gst_video_colorimetry_to_string (&out_info.colorimetry);
gst_caps_set_simple (out_caps, "colorimetry", G_TYPE_STRING,
colorimetry_str, NULL);
g_free (colorimetry_str);
}
}
/* Only YUV output needs chroma-site. If the input was also YUV and had the same chroma
* subsampling, transfer the siting. If the sub-sampling is changing, then the planes get
* scaled anyway so there's no real reason to prefer the input siting. */
if (!have_chroma_site && GST_VIDEO_INFO_IS_YUV (&out_info)) {
if (GST_VIDEO_INFO_IS_YUV (&in_info)) {
const GValue *in_chroma_site =
gst_structure_get_value (in_caps_s, "chroma-site");
if (in_chroma_site != NULL
&& subsampling_unchanged (&in_info, &out_info))
gst_structure_set_value (out_caps_s, "chroma-site", in_chroma_site);
}
}
}
}
static GstCaps *
gst_video_convert_fixate_caps (GstBaseTransform * trans,
GstPadDirection direction, GstCaps * caps, GstCaps * othercaps)
{
GstCaps *result;
GST_DEBUG_OBJECT (trans, "trying to fixate othercaps %" GST_PTR_FORMAT
" based on caps %" GST_PTR_FORMAT, othercaps, caps);
result = gst_caps_intersect (othercaps, caps);
if (gst_caps_is_empty (result)) {
gst_caps_unref (result);
result = othercaps;
} else {
gst_caps_unref (othercaps);
}
GST_DEBUG_OBJECT (trans, "now fixating %" GST_PTR_FORMAT, result);
result = gst_caps_make_writable (result);
gst_video_convert_fixate_format (trans, caps, result);
/* fixate remaining fields */
result = gst_caps_fixate (result);
if (direction == GST_PAD_SINK) {
if (gst_caps_is_subset (caps, result)) {
gst_caps_replace (&result, caps);
} else {
/* Try and preserve input colorimetry / chroma information */
transfer_colorimetry_from_input (trans, caps, result);
}
}
return result;
}
static gboolean
gst_video_convert_filter_meta (GstBaseTransform * trans, GstQuery * query,
GType api, const GstStructure * params)
{
/* This element cannot passthrough the crop meta, because it would convert the
* wrong sub-region of the image, and worst, our output image may not be large
* enough for the crop to be applied later */
if (api == GST_VIDEO_CROP_META_API_TYPE)
return FALSE;
/* propose all other metadata upstream */
return TRUE;
}
/* 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_transform_meta (GstBaseTransform * trans, GstBuffer * outbuf,
GstMeta * meta, GstBuffer * inbuf)
{
const GstMetaInfo *info = meta->info;
gboolean ret;
if (gst_meta_api_type_has_tag (info->api, _colorspace_quark)) {
/* don't copy colorspace specific metadata, FIXME, we need a MetaTransform
* for the colorspace metadata. */
ret = FALSE;
} else {
/* copy other metadata */
ret = TRUE;
}
return ret;
}
static gboolean
gst_video_convert_set_info (GstVideoFilter * filter,
GstCaps * incaps, GstVideoInfo * in_info, GstCaps * outcaps,
GstVideoInfo * out_info)
{
GstVideoConvert *space;
GstBaseTransformClass *gstbasetransform_class =
GST_BASE_TRANSFORM_GET_CLASS (filter);
GstVideoInfo tmp_info;
space = GST_VIDEO_CONVERT_CAST (filter);
if (space->convert) {
gst_video_converter_free (space->convert);
space->convert = NULL;
}
/* 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->interlace_mode != out_info->interlace_mode)
goto format_mismatch;
/* if the only thing different in the caps is the transfer function, and
* we're converting between equivalent transfer functions, do passthrough */
tmp_info = *in_info;
tmp_info.colorimetry.transfer = out_info->colorimetry.transfer;
if (gst_video_info_is_equal (&tmp_info, out_info)) {
if (gst_video_transfer_function_is_equivalent (in_info->
colorimetry.transfer, in_info->finfo->bits,
out_info->colorimetry.transfer, out_info->finfo->bits)) {
gstbasetransform_class->passthrough_on_same_caps = FALSE;
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter), TRUE);
return TRUE;
}
}
gstbasetransform_class->passthrough_on_same_caps = TRUE;
gst_base_transform_set_passthrough (GST_BASE_TRANSFORM (filter), FALSE);
space->convert = gst_video_converter_new (in_info, out_info,
gst_structure_new ("GstVideoConvertConfig",
GST_VIDEO_CONVERTER_OPT_DITHER_METHOD, GST_TYPE_VIDEO_DITHER_METHOD,
space->dither,
GST_VIDEO_CONVERTER_OPT_DITHER_QUANTIZATION, G_TYPE_UINT,
space->dither_quantization,
GST_VIDEO_CONVERTER_OPT_CHROMA_RESAMPLER_METHOD,
GST_TYPE_VIDEO_RESAMPLER_METHOD, space->chroma_resampler,
GST_VIDEO_CONVERTER_OPT_ALPHA_MODE,
GST_TYPE_VIDEO_ALPHA_MODE, space->alpha_mode,
GST_VIDEO_CONVERTER_OPT_ALPHA_VALUE,
G_TYPE_DOUBLE, space->alpha_value,
GST_VIDEO_CONVERTER_OPT_CHROMA_MODE,
GST_TYPE_VIDEO_CHROMA_MODE, space->chroma_mode,
GST_VIDEO_CONVERTER_OPT_MATRIX_MODE,
GST_TYPE_VIDEO_MATRIX_MODE, space->matrix_mode,
GST_VIDEO_CONVERTER_OPT_GAMMA_MODE,
GST_TYPE_VIDEO_GAMMA_MODE, space->gamma_mode,
GST_VIDEO_CONVERTER_OPT_PRIMARIES_MODE,
GST_TYPE_VIDEO_PRIMARIES_MODE, space->primaries_mode,
GST_VIDEO_CONVERTER_OPT_THREADS, G_TYPE_UINT,
space->n_threads, NULL));
if (space->convert == NULL)
goto no_convert;
GST_DEBUG_OBJECT (filter, "converting format %s -> %s",
gst_video_format_to_string (GST_VIDEO_INFO_FORMAT (in_info)),
gst_video_format_to_string (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;
}
}
static void
gst_video_convert_finalize (GObject * obj)
{
GstVideoConvert *space = GST_VIDEO_CONVERT (obj);
if (space->convert) {
gst_video_converter_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_static_pad_template (gstelement_class,
&gst_video_convert_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_video_convert_sink_template);
gst_element_class_set_static_metadata (gstelement_class,
"Colorspace converter", "Filter/Converter/Video",
"Converts video from one colorspace to another",
"GStreamer maintainers <gstreamer-devel@lists.freedesktop.org>");
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->filter_meta =
GST_DEBUG_FUNCPTR (gst_video_convert_filter_meta);
gstbasetransform_class->transform_meta =
GST_DEBUG_FUNCPTR (gst_video_convert_transform_meta);
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",
gst_video_dither_method_get_type (), DEFAULT_PROP_DITHER,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_DITHER_QUANTIZATION,
g_param_spec_uint ("dither-quantization", "Dither Quantize",
"Quantizer to use", 0, G_MAXUINT, DEFAULT_PROP_DITHER_QUANTIZATION,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHROMA_RESAMPLER,
g_param_spec_enum ("chroma-resampler", "Chroma resampler",
"Chroma resampler method", gst_video_resampler_method_get_type (),
DEFAULT_PROP_CHROMA_RESAMPLER,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ALPHA_MODE,
g_param_spec_enum ("alpha-mode", "Alpha Mode",
"Alpha Mode to use", gst_video_alpha_mode_get_type (),
DEFAULT_PROP_ALPHA_MODE, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_ALPHA_VALUE,
g_param_spec_double ("alpha-value", "Alpha Value",
"Alpha Value to use", 0.0, 1.0,
DEFAULT_PROP_ALPHA_VALUE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_CHROMA_MODE,
g_param_spec_enum ("chroma-mode", "Chroma Mode", "Chroma Resampling Mode",
gst_video_chroma_mode_get_type (), DEFAULT_PROP_CHROMA_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_MATRIX_MODE,
g_param_spec_enum ("matrix-mode", "Matrix Mode", "Matrix Conversion Mode",
gst_video_matrix_mode_get_type (), DEFAULT_PROP_MATRIX_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_GAMMA_MODE,
g_param_spec_enum ("gamma-mode", "Gamma Mode", "Gamma Conversion Mode",
gst_video_gamma_mode_get_type (), DEFAULT_PROP_GAMMA_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_PRIMARIES_MODE,
g_param_spec_enum ("primaries-mode", "Primaries Mode",
"Primaries Conversion Mode", gst_video_primaries_mode_get_type (),
DEFAULT_PROP_PRIMARIES_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
g_object_class_install_property (gobject_class, PROP_N_THREADS,
g_param_spec_uint ("n-threads", "Threads",
"Maximum number of threads to use", 0, G_MAXUINT,
DEFAULT_PROP_N_THREADS, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
}
static void
gst_video_convert_init (GstVideoConvert * space)
{
space->dither = DEFAULT_PROP_DITHER;
space->dither_quantization = DEFAULT_PROP_DITHER_QUANTIZATION;
space->chroma_resampler = DEFAULT_PROP_CHROMA_RESAMPLER;
space->alpha_mode = DEFAULT_PROP_ALPHA_MODE;
space->alpha_value = DEFAULT_PROP_ALPHA_VALUE;
space->chroma_mode = DEFAULT_PROP_CHROMA_MODE;
space->matrix_mode = DEFAULT_PROP_MATRIX_MODE;
space->gamma_mode = DEFAULT_PROP_GAMMA_MODE;
space->primaries_mode = DEFAULT_PROP_PRIMARIES_MODE;
space->n_threads = DEFAULT_PROP_N_THREADS;
}
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;
case PROP_CHROMA_RESAMPLER:
csp->chroma_resampler = g_value_get_enum (value);
break;
case PROP_ALPHA_MODE:
csp->alpha_mode = g_value_get_enum (value);
break;
case PROP_ALPHA_VALUE:
csp->alpha_value = g_value_get_double (value);
break;
case PROP_CHROMA_MODE:
csp->chroma_mode = g_value_get_enum (value);
break;
case PROP_MATRIX_MODE:
csp->matrix_mode = g_value_get_enum (value);
break;
case PROP_GAMMA_MODE:
csp->gamma_mode = g_value_get_enum (value);
break;
case PROP_PRIMARIES_MODE:
csp->primaries_mode = g_value_get_enum (value);
break;
case PROP_DITHER_QUANTIZATION:
csp->dither_quantization = g_value_get_uint (value);
break;
case PROP_N_THREADS:
csp->n_threads = g_value_get_uint (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;
case PROP_CHROMA_RESAMPLER:
g_value_set_enum (value, csp->chroma_resampler);
break;
case PROP_ALPHA_MODE:
g_value_set_enum (value, csp->alpha_mode);
break;
case PROP_ALPHA_VALUE:
g_value_set_double (value, csp->alpha_value);
break;
case PROP_CHROMA_MODE:
g_value_set_enum (value, csp->chroma_mode);
break;
case PROP_MATRIX_MODE:
g_value_set_enum (value, csp->matrix_mode);
break;
case PROP_GAMMA_MODE:
g_value_set_enum (value, csp->gamma_mode);
break;
case PROP_PRIMARIES_MODE:
g_value_set_enum (value, csp->primaries_mode);
break;
case PROP_DITHER_QUANTIZATION:
g_value_set_uint (value, csp->dither_quantization);
break;
case PROP_N_THREADS:
g_value_set_uint (value, csp->n_threads);
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 (CAT_PERFORMANCE, filter,
"doing colorspace conversion from %s -> to %s",
GST_VIDEO_INFO_NAME (&filter->in_info),
GST_VIDEO_INFO_NAME (&filter->out_info));
gst_video_converter_frame (space->convert, in_frame, out_frame);
return GST_FLOW_OK;
}
static gboolean
plugin_init (GstPlugin * plugin)
{
GST_DEBUG_CATEGORY_INIT (videoconvert_debug, "videoconvert", 0,
"Colorspace Converter");
GST_DEBUG_CATEGORY_GET (CAT_PERFORMANCE, "GST_PERFORMANCE");
_colorspace_quark = g_quark_from_static_string ("colorspace");
features_format_interlaced =
gst_caps_features_new (GST_CAPS_FEATURE_FORMAT_INTERLACED, NULL);
features_format_interlaced_sysmem =
gst_caps_features_copy (features_format_interlaced);
gst_caps_features_add (features_format_interlaced_sysmem,
GST_CAPS_FEATURE_MEMORY_SYSTEM_MEMORY);
return GST_ELEMENT_REGISTER (videoconvert, plugin);
}
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
GST_VERSION_MINOR,
videoconvert, "Colorspace conversion", plugin_init, VERSION, GST_LICENSE,
GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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