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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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311 lines
9.2 KiB
C
311 lines
9.2 KiB
C
/* -*- c-basic-offset: 2 -*-
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* GStreamer
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* Copyright (C) 1999-2001 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 <gst/gst.h>
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#include <gst/audio/audio.h>
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#include "gstpassthrough.h"
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#define PASSTHRU_BUF_SIZE 4096
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#define PASSTHRU_NUM_BUFS 4
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/* elementfactory information */
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static GstElementDetails passthrough_details = {
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"Passthrough",
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"Filter/Effect/Audio",
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"Transparent filter for audio/raw (boilerplate for effects)",
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"Thomas <thomas@apestaart.org>, " "Andy Wingo <apwingo@eos.ncsu.edu>"
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};
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enum
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{
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/* FILL ME */
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LAST_SIGNAL
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};
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/* static guint gst_filter_signals[LAST_SIGNAL] = { 0 }; */
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enum
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{
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ARG_0,
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ARG_SILENT
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};
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static GstStaticPadTemplate passthrough_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
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GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS)
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);
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static GstStaticPadTemplate passthrough_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; "
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GST_AUDIO_FLOAT_STANDARD_PAD_TEMPLATE_CAPS)
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);
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static void passthrough_class_init (GstPassthroughClass * klass);
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static void passthrough_base_init (GstPassthroughClass * klass);
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static void passthrough_init (GstPassthrough * filter);
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static void passthrough_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void passthrough_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstPadLinkReturn passthrough_connect_sink (GstPad * pad,
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const GstCaps * caps);
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static void passthrough_chain (GstPad * pad, GstData * _data);
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static void inline passthrough_fast_float_chain (gfloat * data,
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guint numsamples);
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static void inline passthrough_fast_16bit_chain (gint16 * data,
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guint numsamples);
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static void inline passthrough_fast_8bit_chain (gint8 * data, guint numsamples);
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static GstElementClass *parent_class = NULL;
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static GstPadLinkReturn
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passthrough_connect_sink (GstPad * pad, const GstCaps * caps)
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{
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const gchar *mimetype;
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GstPassthrough *filter;
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GstStructure *structure;
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g_return_val_if_fail (pad != NULL, GST_PAD_LINK_DELAYED);
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g_return_val_if_fail (caps != NULL, GST_PAD_LINK_DELAYED);
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filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
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g_return_val_if_fail (filter != NULL, GST_PAD_LINK_REFUSED);
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g_return_val_if_fail (GST_IS_PASSTHROUGH (filter), GST_PAD_LINK_REFUSED);
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structure = gst_caps_get_structure (caps, 0);
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mimetype = gst_structure_get_name (structure);
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gst_structure_get_int (structure, "rate", &filter->rate);
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gst_structure_get_int (structure, "channels", &filter->channels);
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gst_structure_get_int (structure, "width", &filter->width);
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gst_structure_get_int (structure, "endianness", &filter->endianness);
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if (strcmp (mimetype, "audio/x-raw-int") == 0) {
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filter->format = GST_PASSTHROUGH_FORMAT_INT;
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gst_structure_get_int (structure, "depth", &filter->depth);
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gst_structure_get_boolean (structure, "signed", &filter->is_signed);
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if (!filter->silent) {
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g_print ("Passthrough : channels %d, rate %d\n", filter->channels,
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filter->rate);
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g_print
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("Passthrough : format int, bit width %d, endianness %d, signed %s\n",
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filter->width, filter->endianness, filter->is_signed ? "yes" : "no");
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}
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} else if (strcmp (mimetype, "audio/x-raw-float") == 0) {
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filter->format = GST_PASSTHROUGH_FORMAT_FLOAT;
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if (!filter->silent) {
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g_print ("Passthrough : channels %d, rate %d\n", filter->channels,
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filter->rate);
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g_print ("Passthrough : format float, width %d\n", filter->width);
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}
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}
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return gst_pad_try_set_caps (filter->srcpad, caps);
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}
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GType
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gst_passthrough_get_type (void)
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{
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static GType passthrough_type = 0;
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if (!passthrough_type) {
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static const GTypeInfo passthrough_info = {
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sizeof (GstPassthroughClass),
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(GBaseInitFunc) passthrough_base_init,
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NULL,
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(GClassInitFunc) passthrough_class_init,
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NULL,
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NULL,
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sizeof (GstPassthrough),
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0,
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(GInstanceInitFunc) passthrough_init,
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};
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passthrough_type =
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g_type_register_static (GST_TYPE_ELEMENT, "GstPassthrough",
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&passthrough_info, 0);
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}
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return passthrough_type;
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}
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static void
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passthrough_base_init (GstPassthroughClass * klass)
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{
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&passthrough_src_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&passthrough_sink_template));
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gst_element_class_set_details (element_class, &passthrough_details);
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}
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static void
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passthrough_class_init (GstPassthroughClass * 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_SILENT, g_param_spec_boolean ("silent", "silent", "silent", TRUE, G_PARAM_READWRITE)); /* CHECKME */
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gobject_class->set_property = passthrough_set_property;
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gobject_class->get_property = passthrough_get_property;
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}
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static void
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passthrough_init (GstPassthrough * filter)
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{
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filter->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&passthrough_src_template), "src");
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gst_element_add_pad (GST_ELEMENT (filter), filter->srcpad);
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filter->sinkpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&passthrough_sink_template), "sink");
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gst_element_add_pad (GST_ELEMENT (filter), filter->sinkpad);
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gst_pad_set_link_function (filter->sinkpad, passthrough_connect_sink);
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gst_pad_set_chain_function (filter->sinkpad, passthrough_chain);
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filter->silent = FALSE;
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}
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static void
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passthrough_chain (GstPad * pad, GstData * _data)
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{
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GstBuffer *buf = GST_BUFFER (_data);
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GstPassthrough *filter;
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gint16 *int_data;
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gfloat *float_data;
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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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filter = GST_PASSTHROUGH (gst_pad_get_parent (pad));
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g_return_if_fail (filter != NULL);
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g_return_if_fail (GST_IS_PASSTHROUGH (filter));
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switch (filter->format) {
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case GST_PASSTHROUGH_FORMAT_INT:
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int_data = (gint16 *) GST_BUFFER_DATA (buf);
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switch (filter->width) {
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case 16:
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passthrough_fast_16bit_chain (int_data, GST_BUFFER_SIZE (buf) / 2);
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break;
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case 8:
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passthrough_fast_8bit_chain ((gint8 *) int_data,
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GST_BUFFER_SIZE (buf));
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break;
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}
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break;
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case GST_PASSTHROUGH_FORMAT_FLOAT:
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float_data = (gfloat *) GST_BUFFER_DATA (buf);
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passthrough_fast_float_chain (float_data,
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GST_BUFFER_SIZE (buf) / sizeof (gfloat));
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break;
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}
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gst_pad_push (filter->srcpad, GST_DATA (buf));
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}
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static void inline
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passthrough_fast_float_chain (gfloat * data, guint num_samples)
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#include "filter.func"
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static void inline
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passthrough_fast_16bit_chain (gint16 * data, guint num_samples)
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#include "filter.func"
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static void inline
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passthrough_fast_8bit_chain (gint8 * data, guint num_samples)
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#include "filter.func"
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static void
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passthrough_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstPassthrough *filter;
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g_return_if_fail (GST_IS_PASSTHROUGH (object));
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filter = GST_PASSTHROUGH (object);
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switch (prop_id) {
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case ARG_SILENT:
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filter->silent = g_value_get_boolean (value);
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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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passthrough_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstPassthrough *filter;
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g_return_if_fail (GST_IS_PASSTHROUGH (object));
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filter = GST_PASSTHROUGH (object);
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switch (prop_id) {
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case ARG_SILENT:
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g_value_set_boolean (value, filter->silent);
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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 gboolean
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plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "passthrough",
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GST_RANK_NONE, GST_TYPE_PASSTHROUGH);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"passthrough",
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"Transparent filter for audio/raw (boilerplate for effects)",
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plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)
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