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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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516 lines
14 KiB
C
516 lines
14 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* This file:
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* Copyright (C) 2003 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* Copyright (C) 2010 David Schleef <ds@schleef.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:element-videoconvert
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*
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* Convert video frames between a great variety of video formats.
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*
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* <refsect2>
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* <title>Example launch line</title>
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* |[
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* gst-launch -v videotestsrc ! video/x-raw,format=\(fourcc\)YUY2 ! videoconvert ! ximagesink
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* ]|
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* </refsect2>
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "gstvideoconvert.h"
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#include <gst/video/video.h>
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#include <gst/video/gstmetavideo.h>
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#include <gst/video/gstvideopool.h>
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#include <string.h>
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GST_DEBUG_CATEGORY (videoconvert_debug);
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#define GST_CAT_DEFAULT videoconvert_debug
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GST_DEBUG_CATEGORY (videoconvert_performance);
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enum
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{
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PROP_0,
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PROP_DITHER
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};
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#define CSP_VIDEO_CAPS GST_VIDEO_CAPS_MAKE (GST_VIDEO_FORMATS_ALL)
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static GstStaticPadTemplate gst_video_convert_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (CSP_VIDEO_CAPS)
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);
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static GstStaticPadTemplate gst_video_convert_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (CSP_VIDEO_CAPS)
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);
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GType gst_video_convert_get_type (void);
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static void gst_video_convert_set_property (GObject * object,
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guint property_id, const GValue * value, GParamSpec * pspec);
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static void gst_video_convert_get_property (GObject * object,
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guint property_id, GValue * value, GParamSpec * pspec);
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static gboolean gst_video_convert_set_caps (GstBaseTransform * btrans,
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GstCaps * incaps, GstCaps * outcaps);
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static gboolean gst_video_convert_get_unit_size (GstBaseTransform * btrans,
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GstCaps * caps, gsize * size);
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static GstFlowReturn gst_video_convert_transform (GstBaseTransform * btrans,
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GstBuffer * inbuf, GstBuffer * outbuf);
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static GType
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dither_method_get_type (void)
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{
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static GType gtype = 0;
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if (gtype == 0) {
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static const GEnumValue values[] = {
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{DITHER_NONE, "No dithering (default)", "none"},
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{DITHER_VERTERR, "Vertical error propogation", "verterr"},
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{DITHER_HALFTONE, "Half-tone", "halftone"},
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{0, NULL, NULL}
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};
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gtype = g_enum_register_static ("GstColorspaceDitherMethod", values);
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}
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return gtype;
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}
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/* copies the given caps */
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static GstCaps *
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gst_video_convert_caps_remove_format_info (GstCaps * caps)
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{
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GstStructure *st;
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gint i, n;
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GstCaps *res;
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res = gst_caps_new_empty ();
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n = gst_caps_get_size (caps);
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for (i = 0; i < n; i++) {
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st = gst_caps_get_structure (caps, i);
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/* If this is already expressed by the existing caps
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* skip this structure */
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if (i > 0 && gst_caps_is_subset_structure (res, st))
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continue;
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st = gst_structure_copy (st);
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gst_structure_remove_fields (st, "format", "palette_data",
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"color-matrix", "chroma-site", NULL);
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gst_caps_append_structure (res, st);
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}
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return res;
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}
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/* The caps can be transformed into any other caps with format info removed.
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* However, we should prefer passthrough, so if passthrough is possible,
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* put it first in the list. */
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static GstCaps *
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gst_video_convert_transform_caps (GstBaseTransform * btrans,
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GstPadDirection direction, GstCaps * caps, GstCaps * filter)
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{
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GstCaps *tmp, *tmp2;
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GstCaps *result;
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result = gst_caps_copy (caps);
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/* Get all possible caps that we can transform to */
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tmp = gst_video_convert_caps_remove_format_info (caps);
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if (filter) {
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tmp2 = gst_caps_intersect_full (filter, tmp, GST_CAPS_INTERSECT_FIRST);
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gst_caps_unref (tmp);
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tmp = tmp2;
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}
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result = tmp;
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GST_DEBUG_OBJECT (btrans, "transformed %" GST_PTR_FORMAT " into %"
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GST_PTR_FORMAT, caps, result);
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return result;
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}
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static gboolean
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gst_video_convert_setup_allocation (GstBaseTransform * trans, GstQuery * query)
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{
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GstBufferPool *pool = NULL;
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guint size, min, max, prefix, alignment;
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gst_query_parse_allocation_params (query, &size, &min, &max, &prefix,
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&alignment, &pool);
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if (pool) {
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GstStructure *config;
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_add_option (config,
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GST_BUFFER_POOL_OPTION_META_VIDEO);
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gst_buffer_pool_set_config (pool, config);
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}
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return TRUE;
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}
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static gboolean
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gst_video_convert_set_caps (GstBaseTransform * btrans, GstCaps * incaps,
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GstCaps * outcaps)
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{
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GstVideoConvert *space;
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GstVideoInfo in_info;
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GstVideoInfo out_info;
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ColorSpaceColorSpec in_spec, out_spec;
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gboolean interlaced;
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space = GST_VIDEO_CONVERT_CAST (btrans);
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if (space->convert) {
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videoconvert_convert_free (space->convert);
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}
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/* input caps */
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if (!gst_video_info_from_caps (&in_info, incaps))
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goto invalid_caps;
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if (in_info.finfo->flags & GST_VIDEO_FORMAT_FLAG_RGB) {
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in_spec = COLOR_SPEC_RGB;
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} else if (in_info.finfo->flags & GST_VIDEO_FORMAT_FLAG_YUV) {
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if (in_info.color_matrix && g_str_equal (in_info.color_matrix, "hdtv"))
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in_spec = COLOR_SPEC_YUV_BT709;
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else
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in_spec = COLOR_SPEC_YUV_BT470_6;
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} else {
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in_spec = COLOR_SPEC_GRAY;
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}
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/* output caps */
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if (!gst_video_info_from_caps (&out_info, outcaps))
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goto invalid_caps;
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if (out_info.finfo->flags & GST_VIDEO_FORMAT_FLAG_RGB) {
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out_spec = COLOR_SPEC_RGB;
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} else if (out_info.finfo->flags & GST_VIDEO_FORMAT_FLAG_YUV) {
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if (out_info.color_matrix && g_str_equal (out_info.color_matrix, "hdtv"))
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out_spec = COLOR_SPEC_YUV_BT709;
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else
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out_spec = COLOR_SPEC_YUV_BT470_6;
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} else {
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out_spec = COLOR_SPEC_GRAY;
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}
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/* these must match */
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if (in_info.width != out_info.width || in_info.height != out_info.height ||
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in_info.fps_n != out_info.fps_n || in_info.fps_d != out_info.fps_d)
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goto format_mismatch;
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/* if present, these must match too */
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if (in_info.par_n != out_info.par_n || in_info.par_d != out_info.par_d)
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goto format_mismatch;
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/* if present, these must match too */
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if ((in_info.flags & GST_VIDEO_FLAG_INTERLACED) !=
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(out_info.flags & GST_VIDEO_FLAG_INTERLACED))
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goto format_mismatch;
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space->from_info = in_info;
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space->from_spec = in_spec;
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space->to_info = out_info;
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space->to_spec = out_spec;
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interlaced = (in_info.flags & GST_VIDEO_FLAG_INTERLACED) != 0;
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space->convert =
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videoconvert_convert_new (GST_VIDEO_INFO_FORMAT (&out_info), out_spec,
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GST_VIDEO_INFO_FORMAT (&in_info), in_spec, in_info.width, in_info.height);
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if (space->convert == NULL)
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goto no_convert;
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videoconvert_convert_set_interlaced (space->convert, interlaced);
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/* palette, only for from data */
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if (GST_VIDEO_INFO_FORMAT (&space->from_info) ==
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GST_VIDEO_FORMAT_RGB8_PALETTED
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&& GST_VIDEO_INFO_FORMAT (&space->to_info) ==
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GST_VIDEO_FORMAT_RGB8_PALETTED) {
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goto format_mismatch;
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} else if (GST_VIDEO_INFO_FORMAT (&space->from_info) ==
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GST_VIDEO_FORMAT_RGB8_PALETTED) {
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GstBuffer *palette;
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guint32 *data;
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palette = gst_video_parse_caps_palette (incaps);
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if (!palette || gst_buffer_get_size (palette) < 256 * 4) {
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if (palette)
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gst_buffer_unref (palette);
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goto invalid_palette;
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}
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data = gst_buffer_map (palette, NULL, NULL, GST_MAP_READ);
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videoconvert_convert_set_palette (space->convert, data);
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gst_buffer_unmap (palette, data, -1);
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gst_buffer_unref (palette);
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} else if (GST_VIDEO_INFO_FORMAT (&space->to_info) ==
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GST_VIDEO_FORMAT_RGB8_PALETTED) {
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const guint32 *palette;
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GstBuffer *p_buf;
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palette = videoconvert_convert_get_palette (space->convert);
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p_buf = gst_buffer_new_and_alloc (256 * 4);
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gst_buffer_fill (p_buf, 0, palette, 256 * 4);
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gst_caps_set_simple (outcaps, "palette_data", GST_TYPE_BUFFER, p_buf, NULL);
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gst_buffer_unref (p_buf);
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}
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GST_DEBUG ("reconfigured %d %d", GST_VIDEO_INFO_FORMAT (&space->from_info),
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GST_VIDEO_INFO_FORMAT (&space->to_info));
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space->negotiated = TRUE;
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return TRUE;
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/* ERRORS */
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invalid_caps:
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{
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GST_ERROR_OBJECT (space, "invalid caps");
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goto error_done;
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}
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format_mismatch:
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{
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GST_ERROR_OBJECT (space, "input and output formats do not match");
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goto error_done;
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}
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no_convert:
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{
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GST_ERROR_OBJECT (space, "could not create converter");
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goto error_done;
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}
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invalid_palette:
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{
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GST_ERROR_OBJECT (space, "invalid palette");
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goto error_done;
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}
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error_done:
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{
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space->negotiated = FALSE;
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return FALSE;
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}
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}
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#define gst_video_convert_parent_class parent_class
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G_DEFINE_TYPE (GstVideoConvert, gst_video_convert, GST_TYPE_VIDEO_FILTER);
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static void
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gst_video_convert_finalize (GObject * obj)
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{
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GstVideoConvert *space = GST_VIDEO_CONVERT (obj);
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if (space->convert) {
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videoconvert_convert_free (space->convert);
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}
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G_OBJECT_CLASS (parent_class)->finalize (obj);
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}
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static void
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gst_video_convert_class_init (GstVideoConvertClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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GstElementClass *gstelement_class = (GstElementClass *) klass;
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GstBaseTransformClass *gstbasetransform_class =
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(GstBaseTransformClass *) klass;
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gobject_class->set_property = gst_video_convert_set_property;
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gobject_class->get_property = gst_video_convert_get_property;
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gobject_class->finalize = gst_video_convert_finalize;
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_video_convert_src_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&gst_video_convert_sink_template));
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gst_element_class_set_details_simple (gstelement_class,
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" Colorspace converter", "Filter/Converter/Video",
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"Converts video from one colorspace to another",
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"GStreamer maintainers <gstreamer-devel@lists.sourceforge.net>");
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gstbasetransform_class->transform_caps =
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GST_DEBUG_FUNCPTR (gst_video_convert_transform_caps);
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gstbasetransform_class->set_caps =
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GST_DEBUG_FUNCPTR (gst_video_convert_set_caps);
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gstbasetransform_class->get_unit_size =
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GST_DEBUG_FUNCPTR (gst_video_convert_get_unit_size);
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gstbasetransform_class->setup_allocation =
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GST_DEBUG_FUNCPTR (gst_video_convert_setup_allocation);
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gstbasetransform_class->transform =
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GST_DEBUG_FUNCPTR (gst_video_convert_transform);
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gstbasetransform_class->passthrough_on_same_caps = TRUE;
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g_object_class_install_property (gobject_class, PROP_DITHER,
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g_param_spec_enum ("dither", "Dither", "Apply dithering while converting",
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dither_method_get_type (), DITHER_NONE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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gst_video_convert_init (GstVideoConvert * space)
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{
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space->negotiated = FALSE;
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}
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void
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gst_video_convert_set_property (GObject * object, guint property_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstVideoConvert *csp;
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csp = GST_VIDEO_CONVERT (object);
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switch (property_id) {
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case PROP_DITHER:
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csp->dither = g_value_get_enum (value);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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void
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gst_video_convert_get_property (GObject * object, guint property_id,
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GValue * value, GParamSpec * pspec)
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{
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GstVideoConvert *csp;
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csp = GST_VIDEO_CONVERT (object);
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switch (property_id) {
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case PROP_DITHER:
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g_value_set_enum (value, csp->dither);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, property_id, pspec);
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break;
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}
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}
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static gboolean
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gst_video_convert_get_unit_size (GstBaseTransform * btrans, GstCaps * caps,
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gsize * size)
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{
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gboolean ret = TRUE;
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GstVideoInfo info;
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g_assert (size);
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ret = gst_video_info_from_caps (&info, caps);
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if (ret) {
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*size = info.size;
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}
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return ret;
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}
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static GstFlowReturn
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gst_video_convert_transform (GstBaseTransform * btrans, GstBuffer * inbuf,
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GstBuffer * outbuf)
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{
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GstVideoConvert *space;
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GstVideoFrame in_frame, out_frame;
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space = GST_VIDEO_CONVERT_CAST (btrans);
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GST_DEBUG ("from %s -> to %s", GST_VIDEO_INFO_NAME (&space->from_info),
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GST_VIDEO_INFO_NAME (&space->to_info));
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if (G_UNLIKELY (!space->negotiated))
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goto unknown_format;
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videoconvert_convert_set_dither (space->convert, space->dither);
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if (!gst_video_frame_map (&in_frame, &space->from_info, inbuf, GST_MAP_READ))
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goto invalid_buffer;
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if (!gst_video_frame_map (&out_frame, &space->to_info, outbuf, GST_MAP_WRITE))
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goto invalid_buffer;
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videoconvert_convert_convert (space->convert, &out_frame, &in_frame);
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gst_video_frame_unmap (&out_frame);
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gst_video_frame_unmap (&in_frame);
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/* baseclass copies timestamps */
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GST_DEBUG ("from %s -> to %s done", GST_VIDEO_INFO_NAME (&space->from_info),
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GST_VIDEO_INFO_NAME (&space->to_info));
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return GST_FLOW_OK;
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/* ERRORS */
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unknown_format:
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{
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GST_ELEMENT_ERROR (space, CORE, NOT_IMPLEMENTED, (NULL),
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("attempting to convert colorspaces between unknown formats"));
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return GST_FLOW_NOT_NEGOTIATED;
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}
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invalid_buffer:
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{
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GST_ELEMENT_WARNING (space, CORE, NOT_IMPLEMENTED, (NULL),
|
|
("invalid video buffer received"));
|
|
return GST_FLOW_OK;
|
|
}
|
|
#if 0
|
|
not_supported:
|
|
{
|
|
GST_ELEMENT_ERROR (space, CORE, NOT_IMPLEMENTED, (NULL),
|
|
("cannot convert between formats"));
|
|
return GST_FLOW_NOT_SUPPORTED;
|
|
}
|
|
#endif
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (videoconvert_debug, "videoconvert", 0,
|
|
"Colorspace Converter");
|
|
GST_DEBUG_CATEGORY_GET (videoconvert_performance, "GST_PERFORMANCE");
|
|
|
|
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", "",
|
|
"")
|