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510 lines
14 KiB
C
510 lines
14 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-smokeenc
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* @title: smokeenc
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*
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* Encodes images in smoke format.
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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 <string.h>
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#include "gstsmokeenc.h"
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#include <gst/video/video.h>
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GST_DEBUG_CATEGORY_STATIC (smokeenc_debug);
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#define GST_CAT_DEFAULT smokeenc_debug
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/* SmokeEnc signals and args */
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enum
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{
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FRAME_ENCODED,
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/* FILL ME */
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LAST_SIGNAL
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};
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#define DEFAULT_PROP_MIN_QUALITY 10
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#define DEFAULT_PROP_MAX_QUALITY 85
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#define DEFAULT_PROP_THRESHOLD 3000
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#define DEFAULT_PROP_KEYFRAME 20
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enum
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{
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PROP_0,
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PROP_MIN_QUALITY,
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PROP_MAX_QUALITY,
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PROP_THRESHOLD,
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PROP_KEYFRAME
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/* FILL ME */
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};
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static void gst_smokeenc_base_init (gpointer g_class);
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static void gst_smokeenc_class_init (GstSmokeEnc * klass);
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static void gst_smokeenc_init (GstSmokeEnc * smokeenc);
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static void gst_smokeenc_finalize (GObject * object);
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static GstStateChangeReturn
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gst_smokeenc_change_state (GstElement * element, GstStateChange transition);
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static GstFlowReturn gst_smokeenc_chain (GstPad * pad, GstBuffer * buf);
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static GstCaps *gst_smokeenc_getcaps (GstPad * pad);
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static gboolean gst_smokeenc_setcaps (GstPad * pad, GstCaps * caps);
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static gboolean gst_smokeenc_resync (GstSmokeEnc * smokeenc);
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static void gst_smokeenc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_smokeenc_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstElementClass *parent_class = NULL;
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GType
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gst_smokeenc_get_type (void)
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{
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static GType smokeenc_type = 0;
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if (!smokeenc_type) {
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static const GTypeInfo smokeenc_info = {
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sizeof (GstSmokeEncClass),
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(GBaseInitFunc) gst_smokeenc_base_init,
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NULL,
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(GClassInitFunc) gst_smokeenc_class_init,
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NULL,
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NULL,
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sizeof (GstSmokeEnc),
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0,
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(GInstanceInitFunc) gst_smokeenc_init,
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};
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smokeenc_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstSmokeEnc", &smokeenc_info,
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0);
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}
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return smokeenc_type;
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}
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static GstStaticPadTemplate gst_smokeenc_sink_pad_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 (GST_VIDEO_CAPS_YUV ("I420"))
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);
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static GstStaticPadTemplate gst_smokeenc_src_pad_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 ("video/x-smoke, "
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"width = (int) [ 16, 4096 ], "
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"height = (int) [ 16, 4096 ], " "framerate = (fraction) [ 0/1, MAX ]")
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);
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static void
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gst_smokeenc_base_init (gpointer g_class)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_static_pad_template (element_class,
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&gst_smokeenc_sink_pad_template);
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gst_element_class_add_static_pad_template (element_class,
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&gst_smokeenc_src_pad_template);
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gst_element_class_set_static_metadata (element_class, "Smoke video encoder",
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"Codec/Encoder/Video", "Encode images into the Smoke format",
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"Wim Taymans <wim@fluendo.com>");
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}
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static void
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gst_smokeenc_class_init (GstSmokeEnc * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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parent_class = g_type_class_peek_parent (klass);
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gobject_class->finalize = gst_smokeenc_finalize;
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gobject_class->set_property = gst_smokeenc_set_property;
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gobject_class->get_property = gst_smokeenc_get_property;
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g_object_class_install_property (gobject_class, PROP_MIN_QUALITY,
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g_param_spec_int ("qmin", "Qmin", "Minimum quality",
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0, 100, DEFAULT_PROP_MIN_QUALITY,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_MAX_QUALITY,
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g_param_spec_int ("qmax", "Qmax", "Maximum quality",
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0, 100, DEFAULT_PROP_MAX_QUALITY,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_THRESHOLD,
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g_param_spec_int ("threshold", "Threshold", "Motion estimation threshold",
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0, 100000000, DEFAULT_PROP_THRESHOLD,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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g_object_class_install_property (gobject_class, PROP_KEYFRAME,
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g_param_spec_int ("keyframe", "Keyframe",
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"Insert keyframe every N frames", 1, 100000,
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DEFAULT_PROP_KEYFRAME, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gstelement_class->change_state =
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GST_DEBUG_FUNCPTR (gst_smokeenc_change_state);
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GST_DEBUG_CATEGORY_INIT (smokeenc_debug, "smokeenc", 0,
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"Smoke encoding element");
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}
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static void
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gst_smokeenc_init (GstSmokeEnc * smokeenc)
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{
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/* create the sink and src pads */
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smokeenc->sinkpad =
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gst_pad_new_from_static_template (&gst_smokeenc_sink_pad_template,
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"sink");
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gst_pad_set_chain_function (smokeenc->sinkpad, gst_smokeenc_chain);
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gst_pad_set_getcaps_function (smokeenc->sinkpad, gst_smokeenc_getcaps);
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gst_pad_set_setcaps_function (smokeenc->sinkpad, gst_smokeenc_setcaps);
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gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->sinkpad);
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smokeenc->srcpad =
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gst_pad_new_from_static_template (&gst_smokeenc_src_pad_template, "src");
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gst_pad_set_getcaps_function (smokeenc->srcpad, gst_smokeenc_getcaps);
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gst_pad_use_fixed_caps (smokeenc->srcpad);
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gst_element_add_pad (GST_ELEMENT (smokeenc), smokeenc->srcpad);
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smokeenc->min_quality = DEFAULT_PROP_MIN_QUALITY;
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smokeenc->max_quality = DEFAULT_PROP_MAX_QUALITY;
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smokeenc->threshold = DEFAULT_PROP_THRESHOLD;
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smokeenc->keyframe = DEFAULT_PROP_KEYFRAME;
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}
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static void
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gst_smokeenc_finalize (GObject * object)
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{
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GstSmokeEnc *enc = GST_SMOKEENC (object);
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if (enc->info)
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smokecodec_info_free (enc->info);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static GstCaps *
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gst_smokeenc_getcaps (GstPad * pad)
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{
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GstSmokeEnc *smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
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GstPad *otherpad;
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GstCaps *result, *caps;
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const GstCaps *tcaps;
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const char *name;
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int i;
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GstStructure *structure = NULL;
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/* we want to proxy properties like width, height and framerate from the
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other end of the element */
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otherpad = (pad == smokeenc->srcpad) ? smokeenc->sinkpad : smokeenc->srcpad;
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/* get template caps, we always need this to fiter the peer caps */
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tcaps = gst_pad_get_pad_template_caps (otherpad);
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/* get any constraints on the peer pad */
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caps = gst_pad_peer_get_caps (otherpad);
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if (caps == NULL)
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caps = gst_caps_copy (tcaps);
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else
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caps = gst_caps_make_writable (caps);
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/* intersect with the template */
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result = gst_caps_intersect (caps, tcaps);
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gst_caps_unref (caps);
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if (pad == smokeenc->srcpad) {
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name = "video/x-smoke";
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} else {
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name = "video/x-raw-yuv";
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}
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/* we can only copy width, height, framerate from one side to the other */
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for (i = 0; i < gst_caps_get_size (result); i++) {
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structure = gst_caps_get_structure (result, i);
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gst_structure_set_name (structure, name);
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gst_structure_remove_field (structure, "format");
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/* ... but for the sink pad, we only do I420 anyway, so add that */
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if (pad == smokeenc->sinkpad) {
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gst_structure_set (structure, "format", GST_TYPE_FOURCC,
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GST_STR_FOURCC ("I420"), NULL);
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}
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}
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gst_object_unref (smokeenc);
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return result;
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}
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static gboolean
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gst_smokeenc_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstSmokeEnc *smokeenc;
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GstStructure *structure;
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const GValue *framerate;
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gboolean ret;
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GstCaps *srccaps;
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smokeenc = GST_SMOKEENC (gst_pad_get_parent (pad));
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structure = gst_caps_get_structure (caps, 0);
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framerate = gst_structure_get_value (structure, "framerate");
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if (framerate) {
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smokeenc->fps_num = gst_value_get_fraction_numerator (framerate);
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smokeenc->fps_denom = gst_value_get_fraction_denominator (framerate);
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} else {
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smokeenc->fps_num = 0;
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smokeenc->fps_denom = 1;
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}
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gst_structure_get_int (structure, "width", &smokeenc->width);
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gst_structure_get_int (structure, "height", &smokeenc->height);
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if ((smokeenc->width & 0x0f) != 0 || (smokeenc->height & 0x0f) != 0)
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goto width_or_height_notx16;
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if (!gst_smokeenc_resync (smokeenc))
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goto init_failed;
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srccaps = gst_caps_new_simple ("video/x-smoke",
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"width", G_TYPE_INT, smokeenc->width,
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"height", G_TYPE_INT, smokeenc->height,
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"framerate", GST_TYPE_FRACTION, smokeenc->fps_num, smokeenc->fps_denom,
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NULL);
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ret = gst_pad_set_caps (smokeenc->srcpad, srccaps);
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gst_caps_unref (srccaps);
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gst_object_unref (smokeenc);
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return ret;
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width_or_height_notx16:
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{
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GST_WARNING_OBJECT (smokeenc, "width and height must be multiples of 16"
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", %dx%d not allowed", smokeenc->width, smokeenc->height);
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gst_object_unref (smokeenc);
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return FALSE;
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}
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init_failed:
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{
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GST_WARNING_OBJECT (smokeenc, "could not init decoder");
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gst_object_unref (smokeenc);
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return FALSE;
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}
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}
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static gboolean
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gst_smokeenc_resync (GstSmokeEnc * smokeenc)
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{
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int ret;
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GST_DEBUG ("resync: %dx%d@%d/%dfps", smokeenc->width, smokeenc->height,
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smokeenc->fps_num, smokeenc->fps_denom);
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if (smokeenc->info)
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smokecodec_info_free (smokeenc->info);
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ret = smokecodec_encode_new (&smokeenc->info, smokeenc->width,
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smokeenc->height, smokeenc->fps_num, smokeenc->fps_denom);
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if (ret != SMOKECODEC_OK)
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goto init_failed;
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smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,
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smokeenc->max_quality);
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GST_DEBUG ("resync done");
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return TRUE;
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/* ERRORS */
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init_failed:
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{
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GST_WARNING_OBJECT (smokeenc, "smokecodec_encode_new() failed: %d", ret);
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return FALSE;
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}
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}
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static GstFlowReturn
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gst_smokeenc_chain (GstPad * pad, GstBuffer * buf)
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{
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GstSmokeEnc *smokeenc;
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guchar *data, *outdata;
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gulong size;
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gint outsize;
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guint encsize;
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GstBuffer *outbuf;
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SmokeCodecFlags flags;
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GstFlowReturn ret;
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smokeenc = GST_SMOKEENC (GST_OBJECT_PARENT (pad));
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data = GST_BUFFER_DATA (buf);
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size = GST_BUFFER_SIZE (buf);
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GST_LOG_OBJECT (smokeenc, "got buffer of %lu bytes", size);
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if (smokeenc->need_header) {
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outbuf = gst_buffer_new_and_alloc (256);
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outdata = GST_BUFFER_DATA (outbuf);
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GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
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GST_BUFFER_DURATION (outbuf) = GST_BUFFER_DURATION (buf);
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smokecodec_encode_id (smokeenc->info, outdata, &encsize);
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GST_BUFFER_SIZE (outbuf) = encsize;
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gst_buffer_set_caps (outbuf, GST_PAD_CAPS (smokeenc->srcpad));
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ret = gst_pad_push (smokeenc->srcpad, outbuf);
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if (ret != GST_FLOW_OK)
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goto done;
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smokeenc->need_header = FALSE;
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}
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encsize = outsize = smokeenc->width * smokeenc->height * 3;
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outbuf = gst_buffer_new_and_alloc (outsize);
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outdata = GST_BUFFER_DATA (outbuf);
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GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buf);
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GST_BUFFER_DURATION (outbuf) =
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gst_util_uint64_scale_int (GST_SECOND, smokeenc->fps_denom,
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smokeenc->fps_num);
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gst_buffer_set_caps (outbuf, GST_PAD_CAPS (smokeenc->srcpad));
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flags = 0;
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if ((smokeenc->frame % smokeenc->keyframe) == 0) {
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flags |= SMOKECODEC_KEYFRAME;
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}
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smokecodec_set_quality (smokeenc->info, smokeenc->min_quality,
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smokeenc->max_quality);
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smokecodec_set_threshold (smokeenc->info, smokeenc->threshold);
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smokecodec_encode (smokeenc->info, data, flags, outdata, &encsize);
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gst_buffer_unref (buf);
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GST_BUFFER_SIZE (outbuf) = encsize;
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GST_BUFFER_OFFSET (outbuf) = smokeenc->frame;
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GST_BUFFER_OFFSET_END (outbuf) = smokeenc->frame + 1;
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ret = gst_pad_push (smokeenc->srcpad, outbuf);
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smokeenc->frame++;
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done:
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return ret;
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}
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static void
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gst_smokeenc_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstSmokeEnc *smokeenc;
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g_return_if_fail (GST_IS_SMOKEENC (object));
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smokeenc = GST_SMOKEENC (object);
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switch (prop_id) {
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case PROP_MIN_QUALITY:
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smokeenc->min_quality = g_value_get_int (value);
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break;
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case PROP_MAX_QUALITY:
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smokeenc->max_quality = g_value_get_int (value);
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break;
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case PROP_THRESHOLD:
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smokeenc->threshold = g_value_get_int (value);
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break;
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case PROP_KEYFRAME:
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smokeenc->keyframe = g_value_get_int (value);
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break;
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default:
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break;
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}
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}
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static void
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gst_smokeenc_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstSmokeEnc *smokeenc;
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g_return_if_fail (GST_IS_SMOKEENC (object));
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smokeenc = GST_SMOKEENC (object);
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switch (prop_id) {
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case PROP_MIN_QUALITY:
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g_value_set_int (value, smokeenc->min_quality);
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break;
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case PROP_MAX_QUALITY:
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g_value_set_int (value, smokeenc->max_quality);
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break;
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case PROP_THRESHOLD:
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g_value_set_int (value, smokeenc->threshold);
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break;
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case PROP_KEYFRAME:
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g_value_set_int (value, smokeenc->keyframe);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
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break;
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}
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}
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static GstStateChangeReturn
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gst_smokeenc_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn ret;
|
|
GstSmokeEnc *enc;
|
|
|
|
enc = GST_SMOKEENC (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
/* reset the initial video state */
|
|
enc->width = 0;
|
|
enc->height = 0;
|
|
enc->frame = 0;
|
|
enc->need_header = TRUE;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
if (ret != GST_STATE_CHANGE_SUCCESS)
|
|
return ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|