+++ /dev/null
-/* GStreamer
- * Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
- *
- * 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.
- */
-
-
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
-#include <string.h>
-
-#include <gst/gst.h>
-#include <gst/video/video.h>
-#include <gst/audio/audio.h>
-
-#include "gstsmoothwave.h"
-
-static GstElementDetails gst_smoothwave_details =
-GST_ELEMENT_DETAILS ("Smooth waveform",
- "Visualization",
- "Fading grayscale waveform display",
- "Erik Walthinsen <omega@cse.ogi.edu>");
-
-
-/* SmoothWave signals and args */
-enum
-{
- /* FILL ME */
- LAST_SIGNAL
-};
-
-static void gst_smoothwave_base_init (gpointer g_class);
-static void gst_smoothwave_class_init (GstSmoothWaveClass * klass);
-static void gst_smoothwave_init (GstSmoothWave * smoothwave);
-static void gst_smoothwave_dispose (GObject * object);
-static GstStateChangeReturn gst_sw_change_state (GstElement * element,
- GstStateChange transition);
-static void gst_smoothwave_chain (GstPad * pad, GstData * _data);
-static GstPadLinkReturn gst_sw_sinklink (GstPad * pad, const GstCaps * caps);
-static GstPadLinkReturn gst_sw_srclink (GstPad * pad, const GstCaps * caps);
-
-static GstElementClass *parent_class = NULL;
-
-/*static guint gst_smoothwave_signals[LAST_SIGNAL] = { 0 }; */
-
-#if G_BYTE_ORDER == G_BIG_ENDIAN
-static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("video/x-raw-rgb, "
- "bpp = (int) 32, "
- "depth = (int) 24, "
- "endianness = (int) BIG_ENDIAN, "
- "red_mask = (int) " GST_VIDEO_BYTE2_MASK_32 ", "
- "green_mask = (int) " GST_VIDEO_BYTE3_MASK_32 ", "
- "blue_mask = (int) " GST_VIDEO_BYTE4_MASK_32 ", "
- "width = (int)512, "
- "height = (int)256, " "framerate = " GST_VIDEO_FPS_RANGE)
- );
-#else
-static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
- GST_PAD_SRC,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("video/x-raw-rgb, "
- "bpp = (int) 32, "
- "depth = (int) 24, "
- "endianness = (int) BIG_ENDIAN, "
- "red_mask = (int) " GST_VIDEO_BYTE3_MASK_32 ", "
- "green_mask = (int) " GST_VIDEO_BYTE2_MASK_32 ", "
- "blue_mask = (int) " GST_VIDEO_BYTE1_MASK_32 ", "
- "width = (int)512, "
- "height = (int)256, " "framerate = " GST_VIDEO_FPS_RANGE)
- );
-#endif
-
-static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
- GST_PAD_SINK,
- GST_PAD_ALWAYS,
- GST_STATIC_CAPS ("audio/x-raw-int, "
- "rate = (int) [ 1, MAX ], "
- "channels = (int) [ 1, 2 ], "
- "endianness = (int) BYTE_ORDER, "
- "width = (int) 16, " "depth = (int) 16, " "signed = (boolean) true")
- );
-
-GType
-gst_smoothwave_get_type (void)
-{
- static GType smoothwave_type = 0;
-
- if (!smoothwave_type) {
- static const GTypeInfo smoothwave_info = {
- sizeof (GstSmoothWaveClass),
- gst_smoothwave_base_init,
- NULL,
- (GClassInitFunc) gst_smoothwave_class_init,
- NULL,
- NULL,
- sizeof (GstSmoothWave),
- 0,
- (GInstanceInitFunc) gst_smoothwave_init,
- };
-
- smoothwave_type =
- g_type_register_static (GST_TYPE_ELEMENT, "GstSmoothWave",
- &smoothwave_info, 0);
- }
- return smoothwave_type;
-}
-
-static void
-gst_smoothwave_base_init (gpointer g_class)
-{
- GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
-
- gst_element_class_set_details (element_class, &gst_smoothwave_details);
-}
-
-static void
-gst_smoothwave_class_init (GstSmoothWaveClass * klass)
-{
- GObjectClass *gobject_class;
- GstElementClass *element_class;
-
- gobject_class = (GObjectClass *) klass;
- element_class = (GstElementClass *) klass;
-
- parent_class = g_type_class_ref (GST_TYPE_ELEMENT);
- gobject_class->dispose = gst_smoothwave_dispose;
- element_class->change_state = gst_sw_change_state;
-
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&src_template));
- gst_element_class_add_pad_template (element_class,
- gst_static_pad_template_get (&sink_template));
-}
-
-static void
-gst_smoothwave_init (GstSmoothWave * smoothwave)
-{
- int i;
-
- smoothwave->sinkpad =
- gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
- "sink");
- smoothwave->srcpad =
- gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
- "src");
- gst_element_add_pad (GST_ELEMENT (smoothwave), smoothwave->sinkpad);
- gst_pad_set_chain_function (smoothwave->sinkpad, gst_smoothwave_chain);
- gst_pad_set_link_function (smoothwave->sinkpad, gst_sw_sinklink);
-
- gst_element_add_pad (GST_ELEMENT (smoothwave), smoothwave->srcpad);
- gst_pad_set_link_function (smoothwave->srcpad, gst_sw_srclink);
-
- GST_OBJECT_FLAG_SET (smoothwave, GST_ELEMENT_EVENT_AWARE);
-
- smoothwave->adapter = gst_adapter_new ();
-
- smoothwave->width = 512;
- smoothwave->height = 256;
-
-#define SPLIT_PT 96
-
- /* Fade in blue up to the split point */
- for (i = 0; i < SPLIT_PT; i++)
- smoothwave->palette[i] = (255 * i / SPLIT_PT);
-
- /* After the split point, fade out blue and fade in red */
- for (; i < 256; i++) {
- gint val = (i - SPLIT_PT) * 255 / (255 - SPLIT_PT);
-
- smoothwave->palette[i] = (255 - val) | (val << 16);
- }
-
- smoothwave->imagebuffer = g_malloc (smoothwave->width * smoothwave->height);
- memset (smoothwave->imagebuffer, 0, smoothwave->width * smoothwave->height);
-
- smoothwave->fps = 0;
- smoothwave->sample_rate = 0;
- smoothwave->audio_basetime = GST_CLOCK_TIME_NONE;
- smoothwave->samples_consumed = 0;
-}
-
-inline guchar *
-draw_line (guchar * cur_pos, gint diff_y, gint stride)
-{
- gint j;
-
- if (diff_y > 0) {
- for (j = diff_y; j > 0; j--) {
- cur_pos += stride;
- *cur_pos = 0xff;
- }
- } else if (diff_y < 0) {
- for (j = diff_y; j < 0; j++) {
- cur_pos -= stride;
- *cur_pos = 0xff;
- }
- } else {
- *cur_pos = 0xff;
- }
- return cur_pos;
-}
-
-static void
-gst_smoothwave_dispose (GObject * object)
-{
- GstSmoothWave *sw = GST_SMOOTHWAVE (object);
-
- if (sw->adapter != NULL) {
- g_object_unref (sw->adapter);
- sw->adapter = NULL;
- }
- G_OBJECT_CLASS (parent_class)->dispose (object);
-}
-
-static GstPadLinkReturn
-gst_sw_sinklink (GstPad * pad, const GstCaps * caps)
-{
- GstSmoothWave *sw = GST_SMOOTHWAVE (GST_OBJECT_PARENT (pad));
- GstStructure *structure;
-
- g_return_val_if_fail (sw != NULL, GST_PAD_LINK_REFUSED);
-
- structure = gst_caps_get_structure (caps, 0);
- if (!gst_structure_get_int (structure, "channels", &sw->channels) ||
- !gst_structure_get_int (structure, "rate", &sw->sample_rate))
- return GST_PAD_LINK_REFUSED;
-
- return GST_PAD_LINK_OK;
-}
-
-static GstPadLinkReturn
-gst_sw_srclink (GstPad * pad, const GstCaps * caps)
-{
- GstSmoothWave *sw = GST_SMOOTHWAVE (GST_OBJECT_PARENT (pad));
- GstStructure *structure;
-
- g_return_val_if_fail (sw != NULL, GST_PAD_LINK_REFUSED);
-
- structure = gst_caps_get_structure (caps, 0);
- if (!gst_structure_get_int (structure, "width", &sw->width) ||
- !gst_structure_get_int (structure, "height", &sw->height) ||
- !gst_structure_get_double (structure, "framerate", &sw->fps))
- return GST_PAD_LINK_REFUSED;
-
- return GST_PAD_LINK_OK;
-}
-
-static void
-gst_smoothwave_chain (GstPad * pad, GstData * _data)
-{
- GstBuffer *buf = GST_BUFFER (_data);
- GstSmoothWave *smoothwave;
- guint32 bytesperread;
- gint samples_per_frame;
-
- g_return_if_fail (pad != NULL);
- g_return_if_fail (GST_IS_PAD (pad));
- g_return_if_fail (buf != NULL);
-
- smoothwave = GST_SMOOTHWAVE (GST_OBJECT_PARENT (pad));
-
- if (GST_IS_EVENT (_data)) {
- GstEvent *event = GST_EVENT (_data);
-
- switch (GST_EVENT_TYPE (event)) {
- case GST_EVENT_DISCONTINUOUS:
- {
- gint64 value = 0;
-
- gst_event_discont_get_value (event, GST_FORMAT_TIME, &value);
- gst_adapter_clear (smoothwave->adapter);
- smoothwave->audio_basetime = value;
- smoothwave->samples_consumed = 0;
- }
- default:
- gst_pad_event_default (pad, event);
- break;
- }
- return;
- }
-
- if (!GST_PAD_IS_USABLE (smoothwave->srcpad)) {
- gst_buffer_unref (buf);
- return;
- }
- if (smoothwave->audio_basetime == GST_CLOCK_TIME_NONE)
- smoothwave->audio_basetime = GST_BUFFER_TIMESTAMP (buf);
- if (smoothwave->audio_basetime == GST_CLOCK_TIME_NONE)
- smoothwave->audio_basetime = 0;
-
- bytesperread = smoothwave->width * smoothwave->channels * sizeof (gint16);
- samples_per_frame = smoothwave->sample_rate / smoothwave->fps;
-
- gst_adapter_push (smoothwave->adapter, buf);
- while (gst_adapter_available (smoothwave->adapter) > MAX (bytesperread,
- samples_per_frame * smoothwave->channels * sizeof (gint16))) {
- guint32 *ptr;
- gint i;
- gint qheight;
- const gint16 *samples =
- (const guint16 *) gst_adapter_peek (smoothwave->adapter, bytesperread);
- gint stride = smoothwave->width;
-
- /* First draw the new waveform */
- if (smoothwave->channels == 2) {
- guchar *cur_pos[2];
- gint prev_y[2];
-
- qheight = smoothwave->height / 4;
- prev_y[0] = (gint32) (*samples) * qheight / 32768;
- samples++;
- prev_y[1] = (gint32) (*samples) * qheight / 32768;
- samples++;
- cur_pos[0] = smoothwave->imagebuffer + ((prev_y[0] + qheight) * stride);
- cur_pos[1] =
- smoothwave->imagebuffer + ((prev_y[1] +
- (3 * smoothwave->height / 4)) * stride);
- *(cur_pos[0]) = 0xff;
- *(cur_pos[1]) = 0xff;
-
- for (i = 1; i < smoothwave->width; i++) {
- gint diff_y = (gint) (*samples) * qheight / 32768 - prev_y[0];
-
- samples++;
- cur_pos[0] = draw_line (cur_pos[0], diff_y, stride);
- cur_pos[0]++;
- prev_y[0] += diff_y;
-
- diff_y = (gint) (*samples) * qheight / 32768 - prev_y[1];
- samples++;
- cur_pos[1] = draw_line (cur_pos[1], diff_y, stride);
- cur_pos[1]++;
- prev_y[1] += diff_y;
- }
- } else {
- qheight = smoothwave->height / 2;
- guchar *cur_pos;
- gint prev_y;
-
- prev_y = (gint32) (*samples) * qheight / 32768;
- samples++;
- cur_pos = smoothwave->imagebuffer + ((prev_y + qheight) * stride);
- *cur_pos = 0xff;
- for (i = 1; i < smoothwave->width; i++) {
- gint diff_y = (gint) (*samples) * qheight / 32768 - prev_y;
-
- samples++;
- cur_pos = draw_line (cur_pos, diff_y, stride);
- cur_pos++;
- prev_y += diff_y;
- }
- }
-
- /* Now fade stuff out */
- ptr = (guint32 *) smoothwave->imagebuffer;
- for (i = 0; i < (smoothwave->width * smoothwave->height) / 4; i++) {
- if (*ptr)
- *ptr -= ((*ptr & 0xf0f0f0f0ul) >> 4) + ((*ptr & 0xe0e0e0e0ul) >> 5);
- ptr++;
- }
-
- {
- guint32 *out;
- guchar *in;
- GstBuffer *bufout;
-
- bufout =
- gst_buffer_new_and_alloc (smoothwave->width * smoothwave->height * 4);
-
- GST_BUFFER_TIMESTAMP (bufout) =
- smoothwave->audio_basetime +
- (GST_SECOND * smoothwave->samples_consumed / smoothwave->sample_rate);
- GST_BUFFER_DURATION (bufout) = GST_SECOND / smoothwave->fps;
- out = (guint32 *) GST_BUFFER_DATA (bufout);
- in = smoothwave->imagebuffer;
-
- for (i = 0; i < (smoothwave->width * smoothwave->height); i++) {
- *out++ = smoothwave->palette[*in++]; // t | (t << 8) | (t << 16) | (t << 24);
- }
- gst_pad_push (smoothwave->srcpad, GST_DATA (bufout));
- }
- smoothwave->samples_consumed += samples_per_frame;
- gst_adapter_flush (smoothwave->adapter,
- samples_per_frame * smoothwave->channels * sizeof (gint16));
- }
-}
-
-static GstStateChangeReturn
-gst_sw_change_state (GstElement * element, GstStateChange transition)
-{
- GstSmoothWave *sw = GST_SMOOTHWAVE (element);
-
- switch (transition) {
- case GST_STATE_CHANGE_NULL_TO_READY:
- break;
- case GST_STATE_CHANGE_READY_TO_NULL:
- break;
- case GST_STATE_CHANGE_READY_TO_PAUSED:
- sw->audio_basetime = GST_CLOCK_TIME_NONE;
- gst_adapter_clear (sw->adapter);
- break;
- case GST_STATE_CHANGE_PAUSED_TO_READY:
- sw->channels = 0;
- break;
- default:
- break;
- }
-
- return GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
-}
-
-static gboolean
-plugin_init (GstPlugin * plugin)
-{
- if (!gst_library_load ("gstbytestream"))
- return FALSE;
-
- if (!gst_element_register (plugin, "smoothwave", GST_RANK_NONE,
- GST_TYPE_SMOOTHWAVE))
- return FALSE;
-
- return TRUE;
-}
-
-GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
- GST_VERSION_MINOR,
- "smoothwave",
- "Fading greyscale waveform display",
- plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN)
projects / platform / upstream / gst-plugins-good.git / commitdiff