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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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319 lines
8.2 KiB
C
319 lines
8.2 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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/* 2001/04/03 - Updated parseau to use caps nego
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* Zaheer Merali <zaheer@grid9.net
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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 <stdlib.h>
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#include <string.h>
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#include <gstauparse.h>
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/* elementfactory information */
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static GstElementDetails gst_auparse_details = GST_ELEMENT_DETAILS (
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".au parser",
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"Codec/Parser/Audio",
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"Parse an .au file into raw audio",
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"Erik Walthinsen <omega@cse.ogi.edu>"
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);
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GST_PAD_TEMPLATE_FACTORY (sink_factory_templ,
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"sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"auparse_sink",
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"audio/x-au",
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NULL
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)
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)
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GST_PAD_TEMPLATE_FACTORY (src_factory_templ,
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"src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_CAPS_NEW (
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"auparse_src",
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"audio/x-raw-int",
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"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
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"signed", GST_PROPS_LIST(
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GST_PROPS_BOOLEAN (FALSE),
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GST_PROPS_BOOLEAN (TRUE)
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),
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"width", GST_PROPS_LIST(
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GST_PROPS_INT (8),
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GST_PROPS_INT (16)
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),
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"depth", GST_PROPS_LIST(
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GST_PROPS_INT (8),
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GST_PROPS_INT (16)
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),
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"rate", GST_PROPS_INT_RANGE (8000,48000),
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"channels", GST_PROPS_INT_RANGE (1, 2)
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),
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GST_CAPS_NEW (
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"auparse_src_alaw",
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"audio/x-alaw",
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"rate", GST_PROPS_INT_RANGE (8000,48000),
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"channels", GST_PROPS_INT_RANGE (1, 2)
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)
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)
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/* AuParse 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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/* FILL ME */
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};
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static void gst_auparse_base_init (gpointer g_class);
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static void gst_auparse_class_init (GstAuParseClass *klass);
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static void gst_auparse_init (GstAuParse *auparse);
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static void gst_auparse_chain (GstPad *pad,GstData *_data);
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static GstElementClass *parent_class = NULL;
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/*static guint gst_auparse_signals[LAST_SIGNAL] = { 0 }; */
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GType
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gst_auparse_get_type (void)
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{
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static GType auparse_type = 0;
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if (!auparse_type) {
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static const GTypeInfo auparse_info = {
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sizeof(GstAuParseClass),
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gst_auparse_base_init,
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NULL,
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(GClassInitFunc) gst_auparse_class_init,
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NULL,
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NULL,
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sizeof(GstAuParse),
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0,
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(GInstanceInitFunc) gst_auparse_init,
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};
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auparse_type = g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info, 0);
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}
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return auparse_type;
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}
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static void
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gst_auparse_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_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (sink_factory_templ));
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gst_element_class_add_pad_template (element_class,
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GST_PAD_TEMPLATE_GET (src_factory_templ));
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gst_element_class_set_details (element_class, &gst_auparse_details);
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}
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static void
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gst_auparse_class_init (GstAuParseClass *klass)
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{
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GstElementClass *gstelement_class;
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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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}
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static void
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gst_auparse_init (GstAuParse *auparse)
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{
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auparse->sinkpad = gst_pad_new_from_template (
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GST_PAD_TEMPLATE_GET (sink_factory_templ), "sink");
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gst_element_add_pad (GST_ELEMENT (auparse), auparse->sinkpad);
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gst_pad_set_chain_function (auparse->sinkpad, gst_auparse_chain);
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auparse->srcpad = gst_pad_new_from_template (
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GST_PAD_TEMPLATE_GET (src_factory_templ), "src");
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gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
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auparse->offset = 0;
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auparse->size = 0;
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auparse->encoding = 0;
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auparse->frequency = 0;
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auparse->channels = 0;
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}
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static void
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gst_auparse_chain (GstPad *pad, GstData *_data)
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{
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GstBuffer *buf = GST_BUFFER (_data);
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GstAuParse *auparse;
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gchar *data;
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glong size;
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GstCaps* tempcaps;
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gint law, depth;
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gboolean sign;
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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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auparse = GST_AUPARSE (gst_pad_get_parent (pad));
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GST_DEBUG ("gst_auparse_chain: got buffer in '%s'",
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gst_element_get_name (GST_ELEMENT (auparse)));
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data = GST_BUFFER_DATA (buf);
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size = GST_BUFFER_SIZE (buf);
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/* if we haven't seen any data yet... */
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if (auparse->size == 0) {
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GstBuffer *newbuf;
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guint32 *head = (guint32 *)data;
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/* normal format is big endian (au is a Sparc format) */
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if (GUINT32_FROM_BE (*head) == 0x2e736e64) {
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head++;
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auparse->le = 0;
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auparse->offset = GUINT32_FROM_BE (*head);
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head++;
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auparse->size = GUINT32_FROM_BE (*head);
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head++;
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auparse->encoding = GUINT32_FROM_BE (*head);
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head++;
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auparse->frequency = GUINT32_FROM_BE (*head);
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head++;
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auparse->channels = GUINT32_FROM_BE (*head);
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head++;
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/* and of course, someone had to invent a little endian
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* version. Used by DEC systems. */
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} else if (GUINT32_FROM_LE (*head) == 0x0064732E) {
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auparse->le = 1;
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head++;
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auparse->le = 0;
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auparse->offset = GUINT32_FROM_LE (*head);
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head++;
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auparse->size = GUINT32_FROM_LE (*head);
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head++;
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auparse->encoding = GUINT32_FROM_LE (*head);
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head++;
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auparse->frequency = GUINT32_FROM_LE (*head);
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head++;
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auparse->channels = GUINT32_FROM_LE (*head);
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head++;
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} else {
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g_warning ("help, dunno what I'm looking at!\n");
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gst_buffer_unref(buf);
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return;
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}
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g_print ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld\n",
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auparse->offset,auparse->size,auparse->encoding,
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auparse->frequency,auparse->channels);
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GST_DEBUG ("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
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auparse->offset,auparse->size,auparse->encoding,
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auparse->frequency,auparse->channels);
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switch (auparse->encoding) {
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case 1:
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law = 1;
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depth = 8;
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sign = FALSE;
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break;
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case 2:
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law = 0;
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depth = 8;
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sign = FALSE;
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break;
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case 3:
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law = 0;
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depth = 16;
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sign = TRUE;
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break;
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default:
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g_warning ("help!, dont know how to deal with this format yet\n");
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return;
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}
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if (law) {
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tempcaps = GST_CAPS_NEW ("auparse_src",
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"audio/x-alaw",
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"rate", GST_PROPS_INT (auparse->frequency),
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"channels", GST_PROPS_INT (auparse->channels));
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} else {
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tempcaps = GST_CAPS_NEW ("auparse_src",
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"audio/x-raw-int",
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"endianness", GST_PROPS_INT (G_BIG_ENDIAN),
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"rate", GST_PROPS_INT (auparse->frequency),
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"channels", GST_PROPS_INT (auparse->channels),
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"depth", GST_PROPS_INT (depth),
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"width", GST_PROPS_INT (depth),
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"signed", GST_PROPS_BOOLEAN (sign));
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}
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if (gst_pad_try_set_caps (auparse->srcpad, tempcaps) <= 0) {
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gst_buffer_unref (buf);
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gst_element_error (GST_ELEMENT (auparse), "could not set audio caps");
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return;
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}
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newbuf = gst_buffer_new ();
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GST_BUFFER_DATA (newbuf) = (gpointer) malloc (size-(auparse->offset));
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memcpy (GST_BUFFER_DATA (newbuf), data+24, size-(auparse->offset));
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GST_BUFFER_SIZE (newbuf) = size-(auparse->offset);
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gst_buffer_unref (buf);
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gst_pad_push (auparse->srcpad, GST_DATA (newbuf));
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return;
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}
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gst_pad_push (auparse->srcpad, GST_DATA (buf));
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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, "auparse", GST_RANK_SECONDARY,
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GST_TYPE_AUPARSE)) {
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return FALSE;
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}
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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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"auparse",
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"parses au streams",
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plugin_init,
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VERSION,
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"GPL",
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GST_PACKAGE,
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GST_ORIGIN
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)
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