/* gstgoom.c: implementation of goom drawing element * Copyright (C) <2001> Richard Boulton * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ /** * SECTION:element-goom * @see_also: synaesthesia * * * Example launch line * * * gst-launch -v sinesrc ! goom ! ffmpegcolorspace ! xvimagesink * * * */ #ifdef HAVE_CONFIG_H #include "config.h" #endif #include #include #include "gstgoom.h" #include #include "goom_core.h" GST_DEBUG_CATEGORY_STATIC (goom_debug); #define GST_CAT_DEFAULT goom_debug /* elementfactory information */ static GstElementDetails gst_goom_details = { "GOOM: what a GOOM!", "Visualization", "Takes frames of data and outputs video frames using the GOOM filter", "Wim Taymans " }; /* signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0 /* FILL ME */ }; static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS (GST_VIDEO_CAPS_xRGB_HOST_ENDIAN) ); static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink", /* the name of the pads */ GST_PAD_SINK, /* type of the pad */ GST_PAD_ALWAYS, /* ALWAYS/SOMETIMES */ GST_STATIC_CAPS ("audio/x-raw-int, " "endianness = (int) BYTE_ORDER, " "signed = (boolean) TRUE, " "width = (int) 16, " "depth = (int) 16, " "rate = (int) [ 8000, 96000 ], " "channels = (int) [ 1, 2 ]") ); static void gst_goom_class_init (GstGoomClass * klass); static void gst_goom_base_init (GstGoomClass * klass); static void gst_goom_init (GstGoom * goom); static void gst_goom_dispose (GObject * object); static GstStateChangeReturn gst_goom_change_state (GstElement * element, GstStateChange transition); static GstFlowReturn gst_goom_chain (GstPad * pad, GstBuffer * buffer); static gboolean gst_goom_event (GstPad * pad, GstEvent * event); static GstPadLinkReturn gst_goom_sink_setcaps (GstPad * pad, GstCaps * caps); static GstPadLinkReturn gst_goom_src_setcaps (GstPad * pad, GstCaps * caps); static GstElementClass *parent_class = NULL; GType gst_goom_get_type (void) { static GType type = 0; if (!type) { static const GTypeInfo info = { sizeof (GstGoomClass), (GBaseInitFunc) gst_goom_base_init, NULL, (GClassInitFunc) gst_goom_class_init, NULL, NULL, sizeof (GstGoom), 0, (GInstanceInitFunc) gst_goom_init, }; type = g_type_register_static (GST_TYPE_ELEMENT, "GstGoom", &info, 0); } return type; } static void gst_goom_base_init (GstGoomClass * klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_element_class_set_details (element_class, &gst_goom_details); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&sink_template)); gst_element_class_add_pad_template (element_class, gst_static_pad_template_get (&src_template)); } static void gst_goom_class_init (GstGoomClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass *) klass; gstelement_class = (GstElementClass *) klass; parent_class = g_type_class_ref (GST_TYPE_ELEMENT); gobject_class->dispose = gst_goom_dispose; gstelement_class->change_state = gst_goom_change_state; GST_DEBUG_CATEGORY_INIT (goom_debug, "goom", 0, "goom visualisation element"); } static void gst_goom_init (GstGoom * goom) { /* create the sink and src pads */ goom->sinkpad = gst_pad_new_from_template (gst_static_pad_template_get (&sink_template), "sink"); goom->srcpad = gst_pad_new_from_template (gst_static_pad_template_get (&src_template), "src"); gst_element_add_pad (GST_ELEMENT (goom), goom->sinkpad); gst_element_add_pad (GST_ELEMENT (goom), goom->srcpad); gst_pad_set_chain_function (goom->sinkpad, gst_goom_chain); gst_pad_set_event_function (goom->sinkpad, gst_goom_event); gst_pad_set_setcaps_function (goom->sinkpad, gst_goom_sink_setcaps); gst_pad_set_setcaps_function (goom->srcpad, gst_goom_src_setcaps); goom->adapter = gst_adapter_new (); goom->width = 320; goom->height = 200; goom->fps = 25.; /* desired frame rate */ goom->channels = 0; goom->sample_rate = 0; goom->audio_basetime = GST_CLOCK_TIME_NONE; goom->samples_consumed = 0; goom->disposed = FALSE; goom_init (goom->width, goom->height); } static void gst_goom_dispose (GObject * object) { GstGoom *goom = GST_GOOM (object); if (!goom->disposed) { goom_close (); goom->disposed = TRUE; g_object_unref (goom->adapter); goom->adapter = NULL; } G_OBJECT_CLASS (parent_class)->dispose (object); } static gboolean gst_goom_sink_setcaps (GstPad * pad, GstCaps * caps) { GstGoom *goom; GstStructure *structure; goom = GST_GOOM (GST_PAD_PARENT (pad)); structure = gst_caps_get_structure (caps, 0); gst_structure_get_int (structure, "channels", &goom->channels); gst_structure_get_int (structure, "rate", &goom->sample_rate); return TRUE; } static gboolean gst_goom_src_setcaps (GstPad * pad, GstCaps * caps) { GstGoom *goom; GstStructure *structure; goom = GST_GOOM (GST_PAD_PARENT (pad)); structure = gst_caps_get_structure (caps, 0); gst_structure_get_int (structure, "width", &goom->width); gst_structure_get_int (structure, "height", &goom->height); gst_structure_get_double (structure, "framerate", &goom->fps); goom_set_resolution (goom->width, goom->height); return TRUE; } static gboolean gst_goom_src_negotiate (GstGoom * goom) { GstCaps *othercaps, *target, *intersect; GstStructure *structure; const GstCaps *templ; templ = gst_pad_get_pad_template_caps (goom->srcpad); /* see what the peer can do */ othercaps = gst_pad_peer_get_caps (goom->srcpad); if (othercaps) { intersect = gst_caps_intersect (othercaps, templ); gst_caps_unref (othercaps); if (gst_caps_is_empty (intersect)) goto no_format; target = gst_caps_copy_nth (intersect, 0); gst_caps_unref (intersect); } else { target = gst_caps_ref ((GstCaps *) templ); } structure = gst_caps_get_structure (target, 0); gst_caps_structure_fixate_field_nearest_int (structure, "width", 320); gst_caps_structure_fixate_field_nearest_int (structure, "height", 240); gst_caps_structure_fixate_field_nearest_double (structure, "framerate", 30.0); gst_pad_set_caps (goom->srcpad, target); gst_caps_unref (target); return TRUE; no_format: { gst_caps_unref (intersect); gst_caps_unref (othercaps); return FALSE; } } static gboolean gst_goom_event (GstPad * pad, GstEvent * event) { gboolean res; GstGoom *goom; goom = GST_GOOM (GST_PAD_PARENT (pad)); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_NEWSEGMENT: { gint64 start = 0, stop = 0; GstFormat format; gst_event_parse_newsegment (event, NULL, NULL, &format, &start, &stop, NULL); gst_adapter_clear (goom->adapter); goom->audio_basetime = start; goom->samples_consumed = 0; GST_DEBUG ("Got discont. Adjusting time to=%" G_GUINT64_FORMAT, start); } default: res = gst_pad_event_default (pad, event); break; } return res; } static GstFlowReturn gst_goom_chain (GstPad * pad, GstBuffer * bufin) { GstGoom *goom; guint32 bytesperread; gint16 *data; gint samples_per_frame; GstFlowReturn ret; goom = GST_GOOM (GST_PAD_PARENT (pad)); if (goom->channels == 0) goto not_negotiated; if (goom->audio_basetime == GST_CLOCK_TIME_NONE) goom->audio_basetime = GST_BUFFER_TIMESTAMP (bufin); if (goom->audio_basetime == GST_CLOCK_TIME_NONE) goom->audio_basetime = 0; bytesperread = GOOM_SAMPLES * goom->channels * sizeof (gint16); samples_per_frame = goom->sample_rate / goom->fps; data = (gint16 *) GST_BUFFER_DATA (bufin); gst_adapter_push (goom->adapter, bufin); GST_DEBUG ("Input buffer has %d samples, time=%" G_GUINT64_FORMAT, GST_BUFFER_SIZE (bufin) * sizeof (gint16) * goom->channels, GST_BUFFER_TIMESTAMP (bufin)); ret = GST_FLOW_OK; if (GST_PAD_CAPS (goom->srcpad) == NULL) { if (!gst_goom_src_negotiate (goom)) goto no_format; } /* Collect samples until we have enough for an output frame */ while (gst_adapter_available (goom->adapter) > MAX (bytesperread, samples_per_frame * goom->channels * sizeof (gint16))) { const guint16 *data; GstBuffer *bufout; guchar *out_frame; GstClockTimeDiff frame_duration; gint i; frame_duration = GST_SECOND / goom->fps; data = (const guint16 *) gst_adapter_peek (goom->adapter, bytesperread); 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++; } } ret = gst_pad_alloc_buffer (goom->srcpad, GST_BUFFER_OFFSET_NONE, goom->width * goom->height * 4, GST_PAD_CAPS (goom->srcpad), &bufout); if (ret != GST_FLOW_OK) break; GST_BUFFER_TIMESTAMP (bufout) = goom->audio_basetime + (GST_SECOND * goom->samples_consumed / goom->sample_rate); GST_BUFFER_DURATION (bufout) = frame_duration; GST_BUFFER_SIZE (bufout) = goom->width * goom->height * 4; out_frame = (guchar *) goom_update (goom->datain); memcpy (GST_BUFFER_DATA (bufout), out_frame, GST_BUFFER_SIZE (bufout)); GST_DEBUG ("Pushing frame with time=%" G_GUINT64_FORMAT ", duration=%" G_GUINT64_FORMAT, GST_BUFFER_TIMESTAMP (bufout), GST_BUFFER_DURATION (bufout)); ret = gst_pad_push (goom->srcpad, bufout); goom->samples_consumed += samples_per_frame; gst_adapter_flush (goom->adapter, samples_per_frame * goom->channels * sizeof (gint16)); if (ret != GST_FLOW_OK) break; } return ret; /* ERRORS */ not_negotiated: { GST_ELEMENT_ERROR (goom, CORE, NEGOTIATION, (NULL), ("Format wasn't negotiated before chain function.")); gst_buffer_unref (bufin); return GST_FLOW_NOT_NEGOTIATED; } no_format: { GST_ELEMENT_ERROR (goom, CORE, NEGOTIATION, (NULL), ("Could not negotiate format on source pad.")); gst_buffer_unref (bufin); return GST_FLOW_ERROR; } } 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: goom->audio_basetime = GST_CLOCK_TIME_NONE; gst_adapter_clear (goom->adapter); goom->channels = 0; break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } static gboolean plugin_init (GstPlugin * plugin) { 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, GST_ORIGIN)