/* -*- c-basic-offset: 2 -*- * GStreamer * Copyright (C) 1999-2001 Erik Walthinsen * * 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 #include #include #include #include "gstspeed.h" /* buffer size to make if no bufferpool is available, must be divisible by * sizeof(gfloat) */ #define SPEED_BUFSIZE 4096 /* number of buffers to allocate per chunk in sink buffer pool */ #define SPEED_NUMBUF 6 /* elementfactory information */ static GstElementDetails speed_details = { "Speed", "Filter/Audio/Effect", "LGPL", "Set speed/pitch on audio/raw streams (resampler)", VERSION, "Andy Wingo ", "(C) 2001" }; /* Filter signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_SPEED }; static GstPadTemplate* speed_sink_factory (void) { static GstPadTemplate *template = NULL; if (!template) { template = gst_pad_template_new ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, gst_caps_append(gst_caps_new ("sink_int", "audio/x-raw-int", GST_AUDIO_INT_PAD_TEMPLATE_PROPS), gst_caps_new ("sink_float", "audio/x-raw-float", GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_PROPS)), NULL); } return template; } static GstPadTemplate* speed_src_factory (void) { static GstPadTemplate *template = NULL; if (!template) template = gst_pad_template_new ("src", GST_PAD_SRC, GST_PAD_ALWAYS, gst_caps_append (gst_caps_new ("src_float", "audio/x-raw-float", GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_PROPS), gst_caps_new ("src_int", "audio/x-raw-int", GST_AUDIO_INT_PAD_TEMPLATE_PROPS)), NULL); return template; } static GstBufferPool* speed_sink_get_bufferpool (GstPad *pad) { GstSpeed *filter; filter = GST_SPEED (gst_pad_get_parent(pad)); return filter->sinkpool; } static void speed_class_init (GstSpeedClass *klass); static void speed_init (GstSpeed *filter); static void speed_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void speed_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static gboolean speed_parse_caps (GstSpeed *filter, GstCaps *caps); static void speed_loop (GstElement *element); static GstElementClass *parent_class = NULL; /*static guint gst_filter_signals[LAST_SIGNAL] = { 0 }; */ static GstPadLinkReturn speed_link (GstPad *pad, GstCaps *caps) { GstSpeed *filter; GstPad *otherpad; filter = GST_SPEED (gst_pad_get_parent (pad)); g_return_val_if_fail (filter != NULL, GST_PAD_LINK_REFUSED); g_return_val_if_fail (GST_IS_SPEED (filter), GST_PAD_LINK_REFUSED); otherpad = (pad == filter->srcpad ? filter->sinkpad : filter->srcpad); if (GST_CAPS_IS_FIXED (caps)) { if (! speed_parse_caps (filter, caps)) return GST_PAD_LINK_REFUSED; return gst_pad_try_set_caps(otherpad, caps); } return GST_PAD_LINK_DELAYED; } static gboolean speed_parse_caps (GstSpeed *filter, GstCaps *caps) { const gchar *mimetype; g_return_val_if_fail(filter != NULL, FALSE); g_return_val_if_fail(caps != NULL, FALSE); gst_caps_get_int (caps, "rate", &filter->rate); gst_caps_get_int (caps, "channels", &filter->channels); gst_caps_get_int (caps, "width", &filter->width); gst_caps_get_int (caps, "endianness", &filter->endianness); gst_caps_get_int (caps, "buffer-frames", &filter->buffer_frames); mimetype = gst_caps_get_mime (caps); if (! strncmp(mimetype, "audio/x-raw-int", 15)) { filter->format = GST_SPEED_FORMAT_INT; gst_caps_get_int (caps, "depth", &filter->depth); gst_caps_get_boolean (caps, "signed", &filter->is_signed); } else if (! strncmp(mimetype, "audio/x-raw-float", 17)) { filter->format = GST_SPEED_FORMAT_FLOAT; } else { return FALSE; } return TRUE; } GType gst_speed_get_type(void) { static GType speed_type = 0; if (!speed_type) { static const GTypeInfo speed_info = { sizeof(GstSpeedClass), NULL, NULL, (GClassInitFunc)speed_class_init, NULL, NULL, sizeof(GstSpeed), 0, (GInstanceInitFunc)speed_init, }; speed_type = g_type_register_static(GST_TYPE_ELEMENT, "GstSpeed", &speed_info, 0); } return speed_type; } static void speed_class_init (GstSpeedClass *klass) { GObjectClass *gobject_class = (GObjectClass*)klass; gobject_class->set_property = speed_set_property; gobject_class->get_property = speed_get_property; parent_class = g_type_class_ref(GST_TYPE_ELEMENT); g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_SPEED, g_param_spec_float("speed","speed","speed", 0.1,40.0,1.0,G_PARAM_READWRITE | G_PARAM_CONSTRUCT)); } static void speed_init (GstSpeed *filter) { filter->sinkpad = gst_pad_new_from_template(speed_sink_factory (), "sink"); gst_pad_set_link_function(filter->sinkpad, speed_link); gst_element_add_pad(GST_ELEMENT(filter),filter->sinkpad); gst_pad_set_bufferpool_function (filter->sinkpad, speed_sink_get_bufferpool); filter->srcpad = gst_pad_new_from_template(speed_src_factory (), "src"); gst_pad_set_link_function(filter->srcpad, speed_link); gst_element_add_pad(GST_ELEMENT(filter),filter->srcpad); gst_element_set_loop_function(GST_ELEMENT(filter),speed_loop); filter->sinkpool = gst_buffer_pool_get_default(SPEED_BUFSIZE, SPEED_NUMBUF); } static void speed_loop (GstElement *element) { GstSpeed *filter = GST_SPEED(element); GstBuffer *in, *out; guint i, j, nin, nout; gfloat interp, speed, lower, i_float; g_return_if_fail(filter != NULL); g_return_if_fail(GST_IS_SPEED(filter)); filter->srcpool = gst_pad_get_bufferpool(filter->srcpad); i = j = 0; speed = filter->speed; in = GST_BUFFER (gst_pad_pull(filter->sinkpad)); if (GST_IS_EVENT (in)) { gst_pad_event_default (filter->sinkpad, GST_EVENT (in)); return; } while (GST_IS_EVENT (in)) { gst_pad_event_default (filter->srcpad, GST_EVENT (in)); in = GST_BUFFER (gst_pad_pull (filter->sinkpad)); } /* this is a bit nasty, but hey, it's what you've got to do to keep the same * algorithm and multiple data types in c. */ if (filter->format==GST_SPEED_FORMAT_FLOAT) { #define _FORMAT gfloat #include "filter.func" #undef _FORMAT } else if (filter->format==GST_SPEED_FORMAT_INT && filter->width==16) { #define _FORMAT gint16 #include "filter.func" #undef _FORMAT } else if (filter->format==GST_SPEED_FORMAT_INT && filter->width==8) { #define _FORMAT gint8 #include "filter.func" #undef _FORMAT } else { gst_element_error (element, "capsnego was never performed, bailing..."); gst_element_yield (element); } } static void speed_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GstSpeed *filter; /* it's not null if we got it, but it might not be ours */ g_return_if_fail(GST_IS_SPEED(object)); filter = GST_SPEED(object); switch (prop_id) { case ARG_SPEED: filter->speed = g_value_get_float (value); break; default: break; } } static void speed_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GstSpeed *filter; /* it's not null if we got it, but it might not be ours */ g_return_if_fail(GST_IS_SPEED(object)); filter = GST_SPEED(object); switch (prop_id) { case ARG_SPEED: g_value_set_float (value, filter->speed); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean plugin_init (GModule *module, GstPlugin *plugin) { GstElementFactory *factory; factory = gst_element_factory_new("speed", GST_TYPE_SPEED, &speed_details); g_return_val_if_fail(factory != NULL, FALSE); gst_element_factory_add_pad_template (factory, speed_src_factory ()); gst_element_factory_add_pad_template (factory, speed_sink_factory ()); gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); return TRUE; } GstPluginDesc plugin_desc = { GST_VERSION_MAJOR, GST_VERSION_MINOR, "speed", plugin_init };