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689 lines
19 KiB
C
689 lines
19 KiB
C
/* gstgoom.c: implementation of goom drawing element
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* Copyright (C) <2001> Richard Boulton <richard@tartarus.org>
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* (C) <2006> Wim Taymans <wim at fluendo dot com>
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* (C) <2011> Wim Taymans <wim.taymans at gmail dot com>
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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-goom
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* @see_also: synaesthesia
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*
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* Goom is an audio visualisation element. It creates warping structures
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* based on the incoming audio signal.
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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-1.0 -v audiotestsrc ! goom ! videoconvert ! xvimagesink
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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 <string.h>
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#include <gst/gst.h>
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#include "gstgoom.h"
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#include <gst/video/video.h>
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#include <gst/audio/audio.h>
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#include "goom.h"
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#if HAVE_ORC
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#include <orc/orc.h>
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#endif
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GST_DEBUG_CATEGORY (goom_debug);
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#define GST_CAT_DEFAULT goom_debug
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#define DEFAULT_WIDTH 320
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#define DEFAULT_HEIGHT 240
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#define DEFAULT_FPS_N 25
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#define DEFAULT_FPS_D 1
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/* signals and args */
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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enum
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{
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ARG_0
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/* FILL ME */
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};
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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#if G_BYTE_ORDER == G_BIG_ENDIAN
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("xRGB"))
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#else
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GST_STATIC_CAPS (GST_VIDEO_CAPS_MAKE ("BGRx"))
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#endif
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);
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", /* the name of the pads */
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GST_PAD_SINK, /* type of the pad */
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GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */
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GST_STATIC_CAPS ("audio/x-raw, "
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"format = (string) " GST_AUDIO_NE (S16) ", "
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"rate = (int) [ 8000, 96000 ], "
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"channels = (int) 1, "
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"layout = (string) interleaved; "
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"audio/x-raw, "
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"format = (string) " GST_AUDIO_NE (S16) ", "
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"rate = (int) [ 8000, 96000 ], "
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"channels = (int) 2, "
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"channel-mask = (bitmask) 0x3, " "layout = (string) interleaved")
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);
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static void gst_goom_finalize (GObject * object);
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static GstStateChangeReturn gst_goom_change_state (GstElement * element,
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GstStateChange transition);
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static GstFlowReturn gst_goom_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buffer);
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static gboolean gst_goom_src_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean gst_goom_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean gst_goom_src_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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#define gst_goom_parent_class parent_class
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G_DEFINE_TYPE (GstGoom, gst_goom, GST_TYPE_ELEMENT);
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static void
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gst_goom_class_init (GstGoomClass * 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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gobject_class->finalize = gst_goom_finalize;
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gst_element_class_set_static_metadata (gstelement_class, "GOOM: what a GOOM!",
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"Visualization",
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"Takes frames of data and outputs video frames using the GOOM filter",
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"Wim Taymans <wim@fluendo.com>");
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sink_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&src_template));
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gstelement_class->change_state = GST_DEBUG_FUNCPTR (gst_goom_change_state);
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}
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static void
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gst_goom_init (GstGoom * goom)
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{
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/* create the sink and src pads */
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goom->sinkpad = gst_pad_new_from_static_template (&sink_template, "sink");
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gst_pad_set_chain_function (goom->sinkpad,
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GST_DEBUG_FUNCPTR (gst_goom_chain));
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gst_pad_set_event_function (goom->sinkpad,
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GST_DEBUG_FUNCPTR (gst_goom_sink_event));
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gst_element_add_pad (GST_ELEMENT (goom), goom->sinkpad);
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goom->srcpad = gst_pad_new_from_static_template (&src_template, "src");
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gst_pad_set_event_function (goom->srcpad,
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GST_DEBUG_FUNCPTR (gst_goom_src_event));
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gst_pad_set_query_function (goom->srcpad,
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GST_DEBUG_FUNCPTR (gst_goom_src_query));
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gst_element_add_pad (GST_ELEMENT (goom), goom->srcpad);
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goom->adapter = gst_adapter_new ();
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goom->width = DEFAULT_WIDTH;
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goom->height = DEFAULT_HEIGHT;
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goom->fps_n = DEFAULT_FPS_N; /* desired frame rate */
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goom->fps_d = DEFAULT_FPS_D; /* desired frame rate */
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goom->channels = 0;
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goom->rate = 0;
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goom->duration = 0;
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goom->plugin = goom_init (goom->width, goom->height);
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}
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static void
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gst_goom_finalize (GObject * object)
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{
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GstGoom *goom = GST_GOOM (object);
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goom_close (goom->plugin);
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goom->plugin = NULL;
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g_object_unref (goom->adapter);
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if (goom->pool)
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gst_object_unref (goom->pool);
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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static void
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gst_goom_reset (GstGoom * goom)
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{
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gst_adapter_clear (goom->adapter);
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gst_segment_init (&goom->segment, GST_FORMAT_UNDEFINED);
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GST_OBJECT_LOCK (goom);
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goom->proportion = 1.0;
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goom->earliest_time = -1;
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GST_OBJECT_UNLOCK (goom);
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}
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static gboolean
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gst_goom_sink_setcaps (GstGoom * goom, GstCaps * caps)
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{
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GstStructure *structure;
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structure = gst_caps_get_structure (caps, 0);
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gst_structure_get_int (structure, "channels", &goom->channels);
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gst_structure_get_int (structure, "rate", &goom->rate);
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goom->bps = goom->channels * sizeof (gint16);
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return TRUE;
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}
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static gboolean
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gst_goom_src_setcaps (GstGoom * goom, GstCaps * caps)
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{
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GstStructure *structure;
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gboolean res;
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structure = gst_caps_get_structure (caps, 0);
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if (!gst_structure_get_int (structure, "width", &goom->width) ||
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!gst_structure_get_int (structure, "height", &goom->height) ||
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!gst_structure_get_fraction (structure, "framerate", &goom->fps_n,
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&goom->fps_d))
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goto error;
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goom_set_resolution (goom->plugin, goom->width, goom->height);
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/* size of the output buffer in bytes, depth is always 4 bytes */
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goom->outsize = goom->width * goom->height * 4;
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goom->duration =
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gst_util_uint64_scale_int (GST_SECOND, goom->fps_d, goom->fps_n);
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goom->spf = gst_util_uint64_scale_int (goom->rate, goom->fps_d, goom->fps_n);
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goom->bpf = goom->spf * goom->bps;
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GST_DEBUG_OBJECT (goom, "dimension %dx%d, framerate %d/%d, spf %d",
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goom->width, goom->height, goom->fps_n, goom->fps_d, goom->spf);
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res = gst_pad_set_caps (goom->srcpad, caps);
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return res;
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/* ERRORS */
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error:
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{
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GST_DEBUG_OBJECT (goom, "error parsing caps");
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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_goom_src_negotiate (GstGoom * goom)
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{
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GstCaps *othercaps, *target;
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GstStructure *structure;
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GstCaps *templ;
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GstQuery *query;
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GstBufferPool *pool;
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GstStructure *config;
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guint size, min, max;
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templ = gst_pad_get_pad_template_caps (goom->srcpad);
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GST_DEBUG_OBJECT (goom, "performing negotiation");
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/* see what the peer can do */
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othercaps = gst_pad_peer_query_caps (goom->srcpad, NULL);
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if (othercaps) {
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target = gst_caps_intersect (othercaps, templ);
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gst_caps_unref (othercaps);
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gst_caps_unref (templ);
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if (gst_caps_is_empty (target))
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goto no_format;
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target = gst_caps_truncate (target);
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} else {
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target = templ;
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}
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structure = gst_caps_get_structure (target, 0);
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gst_structure_fixate_field_nearest_int (structure, "width", DEFAULT_WIDTH);
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gst_structure_fixate_field_nearest_int (structure, "height", DEFAULT_HEIGHT);
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gst_structure_fixate_field_nearest_fraction (structure, "framerate",
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DEFAULT_FPS_N, DEFAULT_FPS_D);
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gst_goom_src_setcaps (goom, target);
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/* try to get a bufferpool now */
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/* find a pool for the negotiated caps now */
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query = gst_query_new_allocation (target, TRUE);
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if (!gst_pad_peer_query (goom->srcpad, query)) {
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/* no problem, we use the query defaults */
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GST_DEBUG_OBJECT (goom, "ALLOCATION query failed");
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}
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if (gst_query_get_n_allocation_pools (query) > 0) {
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/* we got configuration from our peer, parse them */
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gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max);
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} else {
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pool = NULL;
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size = goom->outsize;
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min = max = 0;
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}
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if (pool == NULL) {
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/* we did not get a pool, make one ourselves then */
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pool = gst_buffer_pool_new ();
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}
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config = gst_buffer_pool_get_config (pool);
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gst_buffer_pool_config_set_params (config, target, size, min, max);
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gst_buffer_pool_set_config (pool, config);
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if (goom->pool) {
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gst_buffer_pool_set_active (goom->pool, FALSE);
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gst_object_unref (goom->pool);
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}
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goom->pool = pool;
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/* and activate */
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gst_buffer_pool_set_active (pool, TRUE);
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gst_caps_unref (target);
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return TRUE;
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no_format:
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{
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gst_caps_unref (target);
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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_goom_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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gboolean res;
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GstGoom *goom;
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goom = GST_GOOM (parent);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_QOS:
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{
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gdouble proportion;
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GstClockTimeDiff diff;
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GstClockTime timestamp;
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gst_event_parse_qos (event, NULL, &proportion, &diff, ×tamp);
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/* save stuff for the _chain() function */
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GST_OBJECT_LOCK (goom);
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goom->proportion = proportion;
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if (diff >= 0)
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/* we're late, this is a good estimate for next displayable
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* frame (see part-qos.txt) */
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goom->earliest_time = timestamp + 2 * diff + goom->duration;
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else
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goom->earliest_time = timestamp + diff;
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GST_OBJECT_UNLOCK (goom);
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res = gst_pad_push_event (goom->sinkpad, event);
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break;
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}
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default:
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res = gst_pad_push_event (goom->sinkpad, event);
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break;
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}
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return res;
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}
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static gboolean
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gst_goom_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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gboolean res;
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GstGoom *goom;
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goom = GST_GOOM (parent);
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_CAPS:
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{
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GstCaps *caps;
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gst_event_parse_caps (event, &caps);
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res = gst_goom_sink_setcaps (goom, caps);
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gst_event_unref (event);
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break;
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}
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case GST_EVENT_FLUSH_START:
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res = gst_pad_push_event (goom->srcpad, event);
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break;
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case GST_EVENT_FLUSH_STOP:
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gst_goom_reset (goom);
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res = gst_pad_push_event (goom->srcpad, event);
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break;
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case GST_EVENT_SEGMENT:
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{
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/* the newsegment values are used to clip the input samples
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* and to convert the incomming timestamps to running time so
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* we can do QoS */
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gst_event_copy_segment (event, &goom->segment);
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res = gst_pad_push_event (goom->srcpad, event);
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break;
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}
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default:
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res = gst_pad_push_event (goom->srcpad, event);
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break;
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}
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return res;
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}
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static gboolean
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gst_goom_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
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{
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gboolean res = FALSE;
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GstGoom *goom;
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goom = GST_GOOM (parent);
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_LATENCY:
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{
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/* We need to send the query upstream and add the returned latency to our
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* own */
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GstClockTime min_latency, max_latency;
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gboolean us_live;
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GstClockTime our_latency;
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guint max_samples;
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if (goom->rate == 0)
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break;
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if ((res = gst_pad_peer_query (goom->sinkpad, query))) {
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gst_query_parse_latency (query, &us_live, &min_latency, &max_latency);
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GST_DEBUG_OBJECT (goom, "Peer latency: min %"
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GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
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GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
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/* the max samples we must buffer buffer */
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max_samples = MAX (GOOM_SAMPLES, goom->spf);
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our_latency =
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gst_util_uint64_scale_int (max_samples, GST_SECOND, goom->rate);
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GST_DEBUG_OBJECT (goom, "Our latency: %" GST_TIME_FORMAT,
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GST_TIME_ARGS (our_latency));
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/* we add some latency but only if we need to buffer more than what
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* upstream gives us */
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min_latency += our_latency;
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if (max_latency != -1)
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max_latency += our_latency;
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GST_DEBUG_OBJECT (goom, "Calculated total latency : min %"
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GST_TIME_FORMAT " max %" GST_TIME_FORMAT,
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GST_TIME_ARGS (min_latency), GST_TIME_ARGS (max_latency));
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gst_query_set_latency (query, TRUE, min_latency, max_latency);
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}
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break;
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}
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default:
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res = gst_pad_query_default (pad, parent, query);
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break;
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}
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return res;
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}
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/* make sure we are negotiated */
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static GstFlowReturn
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ensure_negotiated (GstGoom * goom)
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{
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gboolean reconfigure;
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reconfigure = gst_pad_check_reconfigure (goom->srcpad);
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/* we don't know an output format yet, pick one */
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if (reconfigure || !gst_pad_has_current_caps (goom->srcpad)) {
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if (!gst_goom_src_negotiate (goom))
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return GST_FLOW_NOT_NEGOTIATED;
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}
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return GST_FLOW_OK;
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}
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static GstFlowReturn
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gst_goom_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstGoom *goom;
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GstFlowReturn ret;
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GstBuffer *outbuf = NULL;
|
|
|
|
goom = GST_GOOM (parent);
|
|
if (goom->bps == 0) {
|
|
gst_buffer_unref (buffer);
|
|
ret = GST_FLOW_NOT_NEGOTIATED;
|
|
goto beach;
|
|
}
|
|
|
|
/* Make sure have an output format */
|
|
ret = ensure_negotiated (goom);
|
|
if (ret != GST_FLOW_OK) {
|
|
gst_buffer_unref (buffer);
|
|
goto beach;
|
|
}
|
|
|
|
/* don't try to combine samples from discont buffer */
|
|
if (GST_BUFFER_FLAG_IS_SET (buffer, GST_BUFFER_FLAG_DISCONT)) {
|
|
gst_adapter_clear (goom->adapter);
|
|
}
|
|
|
|
GST_DEBUG_OBJECT (goom,
|
|
"Input buffer has %" G_GSIZE_FORMAT " samples, time=%" G_GUINT64_FORMAT,
|
|
gst_buffer_get_size (buffer) / goom->bps, GST_BUFFER_TIMESTAMP (buffer));
|
|
|
|
/* Collect samples until we have enough for an output frame */
|
|
gst_adapter_push (goom->adapter, buffer);
|
|
|
|
ret = GST_FLOW_OK;
|
|
|
|
while (TRUE) {
|
|
const guint16 *data;
|
|
guchar *out_frame;
|
|
gint i;
|
|
guint avail, to_flush;
|
|
guint64 dist, timestamp;
|
|
|
|
avail = gst_adapter_available (goom->adapter);
|
|
GST_DEBUG_OBJECT (goom, "avail now %u", avail);
|
|
|
|
/* we need GOOM_SAMPLES to get a meaningful result from goom. */
|
|
if (avail < (GOOM_SAMPLES * goom->bps))
|
|
break;
|
|
|
|
/* we also need enough samples to produce one frame at least */
|
|
if (avail < goom->bpf)
|
|
break;
|
|
|
|
GST_DEBUG_OBJECT (goom, "processing buffer");
|
|
|
|
/* get timestamp of the current adapter byte */
|
|
timestamp = gst_adapter_prev_pts (goom->adapter, &dist);
|
|
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
|
|
/* convert bytes to time */
|
|
dist /= goom->bps;
|
|
timestamp += gst_util_uint64_scale_int (dist, GST_SECOND, goom->rate);
|
|
}
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (timestamp)) {
|
|
gint64 qostime;
|
|
gboolean need_skip;
|
|
|
|
qostime = gst_segment_to_running_time (&goom->segment, GST_FORMAT_TIME,
|
|
timestamp) + goom->duration;
|
|
|
|
GST_OBJECT_LOCK (goom);
|
|
/* check for QoS, don't compute buffers that are known to be late */
|
|
need_skip = goom->earliest_time != -1 && qostime <= goom->earliest_time;
|
|
GST_OBJECT_UNLOCK (goom);
|
|
|
|
if (need_skip) {
|
|
GST_WARNING_OBJECT (goom,
|
|
"QoS: skip ts: %" GST_TIME_FORMAT ", earliest: %" GST_TIME_FORMAT,
|
|
GST_TIME_ARGS (qostime), GST_TIME_ARGS (goom->earliest_time));
|
|
goto skip;
|
|
}
|
|
}
|
|
|
|
/* get next GOOM_SAMPLES, we have at least this amount of samples */
|
|
data =
|
|
(const guint16 *) gst_adapter_map (goom->adapter,
|
|
GOOM_SAMPLES * goom->bps);
|
|
|
|
if (goom->channels == 2) {
|
|
for (i = 0; i < GOOM_SAMPLES; i++) {
|
|
goom->datain[0][i] = *data++;
|
|
goom->datain[1][i] = *data++;
|
|
}
|
|
} else {
|
|
for (i = 0; i < GOOM_SAMPLES; i++) {
|
|
goom->datain[0][i] = *data;
|
|
goom->datain[1][i] = *data++;
|
|
}
|
|
}
|
|
|
|
/* alloc a buffer if we don't have one yet, this happens
|
|
* when we pushed a buffer in this while loop before */
|
|
if (outbuf == NULL) {
|
|
GST_DEBUG_OBJECT (goom, "allocating output buffer");
|
|
ret = gst_buffer_pool_acquire_buffer (goom->pool, &outbuf, NULL);
|
|
if (ret != GST_FLOW_OK) {
|
|
gst_adapter_unmap (goom->adapter);
|
|
goto beach;
|
|
}
|
|
}
|
|
|
|
GST_BUFFER_TIMESTAMP (outbuf) = timestamp;
|
|
GST_BUFFER_DURATION (outbuf) = goom->duration;
|
|
|
|
out_frame = (guchar *) goom_update (goom->plugin, goom->datain, 0, 0);
|
|
gst_buffer_fill (outbuf, 0, out_frame, goom->outsize);
|
|
|
|
gst_adapter_unmap (goom->adapter);
|
|
|
|
GST_DEBUG ("Pushing frame with time=%" GST_TIME_FORMAT ", duration=%"
|
|
GST_TIME_FORMAT, GST_TIME_ARGS (timestamp),
|
|
GST_TIME_ARGS (goom->duration));
|
|
|
|
ret = gst_pad_push (goom->srcpad, outbuf);
|
|
outbuf = NULL;
|
|
|
|
skip:
|
|
/* Now flush the samples we needed for this frame, which might be more than
|
|
* the samples we used (GOOM_SAMPLES). */
|
|
to_flush = goom->bpf;
|
|
|
|
GST_DEBUG_OBJECT (goom, "finished frame, flushing %u bytes from input",
|
|
to_flush);
|
|
gst_adapter_flush (goom->adapter, to_flush);
|
|
|
|
if (ret != GST_FLOW_OK)
|
|
break;
|
|
}
|
|
|
|
if (outbuf != NULL)
|
|
gst_buffer_unref (outbuf);
|
|
|
|
beach:
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_goom_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstGoom *goom = GST_GOOM (element);
|
|
GstStateChangeReturn ret;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_NULL_TO_READY:
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
gst_goom_reset (goom);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
if (goom->pool) {
|
|
gst_buffer_pool_set_active (goom->pool, FALSE);
|
|
gst_object_replace ((GstObject **) & goom->pool, NULL);
|
|
}
|
|
break;
|
|
case GST_STATE_CHANGE_READY_TO_NULL:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
GST_DEBUG_CATEGORY_INIT (goom_debug, "goom", 0, "goom visualisation element");
|
|
|
|
#if HAVE_ORC
|
|
orc_init ();
|
|
#endif
|
|
|
|
return gst_element_register (plugin, "goom", GST_RANK_NONE, GST_TYPE_GOOM);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
goom,
|
|
"GOOM visualization filter",
|
|
plugin_init, VERSION, GST_LICENSE, GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|