mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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314 lines
9.3 KiB
C
314 lines
9.3 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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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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 "gstsmoothwave.h"
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static GstElementDetails gst_smoothwave_details = GST_ELEMENT_DETAILS (
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"Smooth waveform",
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"Visualization",
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"Fading grayscale waveform display",
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"Erik Walthinsen <omega@cse.ogi.edu>"
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);
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/* SmoothWave signals and args */
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enum {
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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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ARG_0,
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ARG_WIDTH,
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ARG_HEIGHT,
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ARG_WIDGET,
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};
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static void gst_smoothwave_base_init (gpointer g_class);
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static void gst_smoothwave_class_init (GstSmoothWaveClass *klass);
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static void gst_smoothwave_init (GstSmoothWave *smoothwave);
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static void gst_smoothwave_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec);
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static void gst_smoothwave_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec);
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static void gst_smoothwave_chain (GstPad *pad, GstData *_data);
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static GstElementClass *parent_class = NULL;
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/*static guint gst_smoothwave_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_smoothwave_get_type (void)
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{
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static GType smoothwave_type = 0;
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if (!smoothwave_type) {
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static const GTypeInfo smoothwave_info = {
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sizeof(GstSmoothWaveClass),
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gst_smoothwave_base_init,
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NULL,
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(GClassInitFunc)gst_smoothwave_class_init,
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NULL,
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NULL,
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sizeof(GstSmoothWave),
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0,
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(GInstanceInitFunc)gst_smoothwave_init,
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};
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smoothwave_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSmoothWave", &smoothwave_info, 0);
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}
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return smoothwave_type;
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}
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static void
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gst_smoothwave_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_set_details (element_class, &gst_smoothwave_details);
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}
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static void
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gst_smoothwave_class_init (GstSmoothWaveClass *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_ref(GST_TYPE_ELEMENT);
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH,
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g_param_spec_int("width","width","width",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT,
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g_param_spec_int("height","height","height",
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G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */
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g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDGET,
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g_param_spec_object("widget","widget","widget",
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GTK_TYPE_WIDGET,G_PARAM_READABLE)); /* CHECKME! */
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gobject_class->set_property = gst_smoothwave_set_property;
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gobject_class->get_property = gst_smoothwave_get_property;
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}
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static void
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gst_smoothwave_init (GstSmoothWave *smoothwave)
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{
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int i;
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guint32 palette[256];
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smoothwave->sinkpad = gst_pad_new("sink",GST_PAD_SINK);
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gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->sinkpad);
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gst_pad_set_chain_function(smoothwave->sinkpad,gst_smoothwave_chain);
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smoothwave->srcpad = gst_pad_new("src",GST_PAD_SRC);
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gst_element_add_pad(GST_ELEMENT(smoothwave),smoothwave->srcpad);
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/* smoothwave->meta = NULL; */
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smoothwave->width = 512;
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smoothwave->height = 256;
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gdk_rgb_init();
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/* gtk_widget_set_default_colormap (gdk_rgb_get_cmap()); */
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/* gtk_widget_set_default_visual (gdk_rgb_get_visual()); */
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/* GST_DEBUG ("creating palette"); */
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for (i=0;i<256;i++)
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palette[i] = (i << 16) || (i << 8);
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/* GST_DEBUG ("creating cmap"); */
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smoothwave->cmap = gdk_rgb_cmap_new(palette,256);
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/* GST_DEBUG ("created cmap"); */
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/* gtk_widget_set_default_colormap (smoothwave->cmap); */
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smoothwave->image = gtk_drawing_area_new();
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gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
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smoothwave->width,smoothwave->height);
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gtk_widget_show(smoothwave->image);
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smoothwave->imagebuffer = g_malloc(smoothwave->width*smoothwave->height);
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memset(smoothwave->imagebuffer,0,smoothwave->width*smoothwave->height);
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}
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static void
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gst_smoothwave_chain (GstPad *pad, GstData *_data)
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{
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GstBuffer *buf = GST_BUFFER (_data);
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GstSmoothWave *smoothwave;
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gint16 *samples;
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gint samplecount,i;
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register guint32 *ptr;
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gint qheight;
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g_return_if_fail(pad != NULL);
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g_return_if_fail(GST_IS_PAD(pad));
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g_return_if_fail(buf != NULL);
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/* g_return_if_fail(GST_IS_BUFFER(buf)); */
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smoothwave = GST_SMOOTHWAVE(GST_OBJECT_PARENT (pad));
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/* first deal with audio metadata */
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#if 0
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if (buf->meta) {
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if (smoothwave->meta != NULL) {
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/* FIXME: need to unref the old metadata so it goes away */
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}
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/* we just make a copy of the pointer */
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smoothwave->meta = (MetaAudioRaw *)(buf->meta);
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/* FIXME: now we have to ref the metadata so it doesn't go away */
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}
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#endif
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/* g_return_if_fail(smoothwave->meta != NULL); */
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samples = (gint16 *)GST_BUFFER_DATA(buf);
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/* samplecount = buf->datasize / (smoothwave->meta->channels * sizeof(gint16)); */
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samplecount = GST_BUFFER_SIZE(buf) / (2 * sizeof(gint16));
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qheight = smoothwave->height/4;
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/* GST_DEBUG ("traversing %d",smoothwave->width); */
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for (i=0;i<MAX(smoothwave->width,samplecount);i++) {
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gint16 y1 = (gint32)(samples[i*2] * qheight) / 32768 +
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qheight;
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gint16 y2 = (gint32)(samples[(i*2)+1] * qheight) / 32768 +
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(qheight*3);
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smoothwave->imagebuffer[y1*smoothwave->width + i] = 0xff;
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smoothwave->imagebuffer[y2*smoothwave->width + i] = 0xff;
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/* smoothwave->imagebuffer[i+(smoothwave->width*5)] = i; */
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}
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ptr = (guint32 *)smoothwave->imagebuffer;
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for (i=0;i<(smoothwave->width*smoothwave->height)/4;i++) {
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if (*ptr){
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*ptr -= ((*ptr & 0xf0f0f0f0ul) >> 4) + ((*ptr & 0xe0e0e0e0ul) >> 5);
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ptr++;
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}else{
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ptr++;
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}
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}
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/* GST_DEBUG ("drawing"); */
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/* GST_DEBUG ("gdk_draw_indexed_image(%p,%p,%d,%d,%d,%d,%s,%p,%d,%p);",
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smoothwave->image->window,
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smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
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0,0,smoothwave->width,smoothwave->height,
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"GDK_RGB_DITHER_NORMAL",
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smoothwave->imagebuffer,smoothwave->width,
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smoothwave->cmap);*/
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/* gdk_draw_indexed_image(smoothwave->image->window,
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smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
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0,0,smoothwave->width,smoothwave->height,
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GDK_RGB_DITHER_NONE,
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smoothwave->imagebuffer,smoothwave->width,
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smoothwave->cmap);*/
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gdk_draw_gray_image(smoothwave->image->window,
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smoothwave->image->style->fg_gc[GTK_STATE_NORMAL],
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0,0,smoothwave->width,smoothwave->height,
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GDK_RGB_DITHER_NORMAL,
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smoothwave->imagebuffer,smoothwave->width);
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/* gst_trace_add_entry(NULL,0,buf,"smoothwave: calculated smoothwave"); */
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gst_buffer_unref(buf);
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}
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static void
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gst_smoothwave_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec)
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{
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GstSmoothWave *smoothwave;
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/* it's not null if we got it, but it might not be ours */
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g_return_if_fail(GST_IS_SMOOTHWAVE(object));
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smoothwave = GST_SMOOTHWAVE(object);
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switch (prop_id) {
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case ARG_WIDTH:
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smoothwave->width = g_value_get_int (value);
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gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
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smoothwave->width,smoothwave->height);
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gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
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smoothwave->width,smoothwave->height);
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break;
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case ARG_HEIGHT:
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smoothwave->height = g_value_get_int (value);
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gtk_drawing_area_size(GTK_DRAWING_AREA(smoothwave->image),
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smoothwave->width,smoothwave->height);
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gtk_widget_set_usize(GTK_WIDGET(smoothwave->image),
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smoothwave->width,smoothwave->height);
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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_smoothwave_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec)
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{
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GstSmoothWave *smoothwave;
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/* it's not null if we got it, but it might not be ours */
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smoothwave = GST_SMOOTHWAVE(object);
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switch (prop_id) {
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case ARG_WIDTH: {
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g_value_set_int (value, smoothwave->width);
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break;
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}
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case ARG_HEIGHT: {
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g_value_set_int (value, smoothwave->height);
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break;
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}
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case ARG_WIDGET: {
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g_value_set_object (value, smoothwave->image);
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break;
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}
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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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}
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static gboolean
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plugin_init (GstPlugin *plugin)
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{
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if (!gst_element_register (plugin, "smoothwave", GST_RANK_NONE, GST_TYPE_SMOOTHWAVE))
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return FALSE;
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return TRUE;
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}
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GST_PLUGIN_DEFINE (
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GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"smoothwave",
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"Fading greyscale waveform display",
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plugin_init,
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VERSION,
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"LGPL",
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GST_PACKAGE,
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GST_ORIGIN)
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