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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-24 09:10:36 +00:00
wavescope: add a style property for drawing modes
Add a style enum of { dots, lines}. Now this elements is a superset of smoothwave.
This commit is contained in:
Stefan Sauer
parent
27556bd668
commit
85aba22118
2 changed files with 176 additions and 15 deletions
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@ -35,6 +35,7 @@
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#include "config.h"
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#endif
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#include <stdlib.h>
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#include "gstwavescope.h"
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static GstStaticPadTemplate gst_wave_scope_src_template =
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@ -55,7 +56,48 @@ GST_STATIC_PAD_TEMPLATE ("sink",
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GST_DEBUG_CATEGORY_STATIC (wave_scope_debug);
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#define GST_CAT_DEFAULT wave_scope_debug
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static gboolean gst_wave_scope_render (GstBaseAudioVisualizer * scope,
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enum
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{
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PROP_0,
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PROP_STYLE
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};
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enum
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{
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STYLE_DOTS = 0,
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STYLE_LINES,
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NUM_STYLES
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};
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#define GST_TYPE_WAVE_SCOPE_STYLE (gst_wave_scope_style_get_type ())
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static GType
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gst_wave_scope_style_get_type (void)
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{
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static GType gtype = 0;
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if (gtype == 0) {
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static const GEnumValue values[] = {
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{STYLE_DOTS, "draw dots (default)", "dots"},
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{STYLE_LINES, "draw lines", "lines"},
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{0, NULL, NULL}
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};
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gtype = g_enum_register_static ("GstWaveScopeStyle", values);
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}
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return gtype;
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}
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static void gst_wave_scope_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_wave_scope_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void render_dots (GstBaseAudioVisualizer * scope, guint32 * vdata,
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gint16 * adata, guint num_samples);
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static void render_lines (GstBaseAudioVisualizer * scope, guint32 * vdata,
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gint16 * adata, guint num_samples);
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static gboolean gst_wave_scope_render (GstBaseAudioVisualizer * base,
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GstBuffer * audio, GstBuffer * video);
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@ -80,10 +122,20 @@ gst_wave_scope_base_init (gpointer g_class)
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static void
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gst_wave_scope_class_init (GstWaveScopeClass * g_class)
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{
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GObjectClass *gobject_class = (GObjectClass *) g_class;
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GstBaseAudioVisualizerClass *scope_class =
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(GstBaseAudioVisualizerClass *) g_class;
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gobject_class->set_property = gst_wave_scope_set_property;
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gobject_class->get_property = gst_wave_scope_get_property;
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scope_class->render = GST_DEBUG_FUNCPTR (gst_wave_scope_render);
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g_object_class_install_property (gobject_class, PROP_STYLE,
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g_param_spec_enum ("style", "drawing style",
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"Drawing styles for the wave form display.",
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GST_TYPE_WAVE_SCOPE_STYLE, STYLE_DOTS,
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G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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}
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static void
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@ -92,31 +144,134 @@ gst_wave_scope_init (GstWaveScope * scope, GstWaveScopeClass * g_class)
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/* do nothing */
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}
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static gboolean
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gst_wave_scope_render (GstBaseAudioVisualizer * scope, GstBuffer * audio,
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GstBuffer * video)
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static void
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gst_wave_scope_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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guint32 *vdata = (guint32 *) GST_BUFFER_DATA (video);
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gint16 *adata = (gint16 *) GST_BUFFER_DATA (audio);
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guint i, c, s, x, y, off, oy;
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guint num_samples;
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GstWaveScope *scope = GST_WAVE_SCOPE (object);
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switch (prop_id) {
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case PROP_STYLE:
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scope->style = g_value_get_enum (value);
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switch (scope->style) {
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case STYLE_DOTS:
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scope->process = render_dots;
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break;
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case STYLE_LINES:
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scope->process = render_lines;
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break;
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}
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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 void
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gst_wave_scope_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstWaveScope *scope = GST_WAVE_SCOPE (object);
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switch (prop_id) {
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case PROP_STYLE:
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g_value_set_enum (value, scope->style);
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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 void
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render_dots (GstBaseAudioVisualizer * scope, guint32 * vdata, gint16 * adata,
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guint num_samples)
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{
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gint channels = scope->channels;
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guint i, c, s, x = 0, y, oy;
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gfloat dx, dy;
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guint w = scope->width;
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guint off;
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/* draw dots */
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num_samples = GST_BUFFER_SIZE (audio) / (scope->channels * sizeof (gint16));
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dx = (gfloat) scope->width / (gfloat) num_samples;
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dx = (gfloat) w / (gfloat) num_samples;
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dy = scope->height / 65536.0;
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oy = scope->height / 2;
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s = 0;
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for (i = 0; i < num_samples; i++) {
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x = (guint) ((gfloat) i * dx);
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for (c = 0; c < scope->channels; c++) {
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y = (guint) (oy + (gfloat) adata[s++] * dy);
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for (c = 0; c < channels; c++) {
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s = c;
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for (i = 0; i < num_samples; i++) {
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x = (guint) ((gfloat) i * dx);
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y = (guint) (oy + (gfloat) adata[s] * dy);
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s += channels;
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off = (y * w) + x;
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vdata[off] = 0x00FFFFFF;
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}
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}
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}
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static void
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draw_line (guint32 * vdata, guint x1, guint x2, guint y1, guint y2, guint w)
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{
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guint i, j, x, y, off;
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gint dx = x2 - x1;
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gint dy = y2 - y1;
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gfloat f;
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if (abs (dx) > abs (dy)) {
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j = abs (dx);
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} else {
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j = abs (dy);
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}
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for (i = 0; i < j; i++) {
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f = (gfloat) i / (gfloat) j;
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x = x1 + dx * f;
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y = y1 + dy * f;
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off = (y * w) + x;
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vdata[off] = 0x00FFFFFF;
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}
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}
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static void
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render_lines (GstBaseAudioVisualizer * scope, guint32 * vdata, gint16 * adata,
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guint num_samples)
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{
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gint channels = scope->channels;
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guint i, c, s, x = 0, y, oy;
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gfloat dx, dy;
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guint w = scope->width;
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gint x2, y2;
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/* draw lines */
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dx = (gfloat) w / (gfloat) num_samples;
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dy = scope->height / 65536.0;
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oy = scope->height / 2;
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for (c = 0; c < channels; c++) {
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s = c;
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x2 = 0;
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y2 = (guint) (oy + (gfloat) adata[s] * dy);
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for (i = 1; i < num_samples; i++) {
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x = (guint) ((gfloat) i * dx);
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y = (guint) (oy + (gfloat) adata[s] * dy);
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s += channels;
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draw_line (vdata, x2, x, y2, y, w);
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x2 = x;
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y2 = y;
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}
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}
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}
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static gboolean
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gst_wave_scope_render (GstBaseAudioVisualizer * base, GstBuffer * audio,
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GstBuffer * video)
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{
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GstWaveScope *scope = GST_WAVE_SCOPE (base);
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guint32 *vdata = (guint32 *) GST_BUFFER_DATA (video);
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gint16 *adata = (gint16 *) GST_BUFFER_DATA (audio);
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guint num_samples;
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num_samples = GST_BUFFER_SIZE (audio) / (base->channels * sizeof (gint16));
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scope->process (base, vdata, adata, num_samples);
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return TRUE;
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}
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@ -33,9 +33,15 @@ G_BEGIN_DECLS
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typedef struct _GstWaveScope GstWaveScope;
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typedef struct _GstWaveScopeClass GstWaveScopeClass;
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typedef void (*GstWaveScopeProcessFunc) (GstBaseAudioVisualizer *, guint32 *, gint16 *, guint);
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struct _GstWaveScope
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{
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GstBaseAudioVisualizer parent;
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/* < private > */
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GstWaveScopeProcessFunc process;
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gint style;
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};
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struct _GstWaveScopeClass
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