mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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5a3704a4f0
Original commit message from CVS: * gst-libs/gst/riff/riff-ids.h : - add CDXA to the list of RIFF types - add plst (playlist ?) to wav chunk list (only diff with wavparse/riff.h)
386 lines
12 KiB
C
386 lines
12 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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/* Element-Checklist-Version: 5 */
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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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#include <gst/audio/audio.h>
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/* elementfactory information */
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static GstElementDetails gst_auparse_details =
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GST_ELEMENT_DETAILS (".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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static GstStaticPadTemplate gst_auparse_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 ("audio/x-au")
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);
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static GstStaticPadTemplate gst_auparse_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_SOMETIMES, /* FIXME: spider */
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GST_STATIC_CAPS (GST_AUDIO_INT_PAD_TEMPLATE_CAPS "; " /* 24-bit PCM is barely supported by gstreamer actually */
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GST_AUDIO_FLOAT_PAD_TEMPLATE_CAPS "; " /* 64-bit float is barely supported by gstreamer actually */
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"audio/x-alaw, "
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"rate = (int) [ 8000, 192000 ], "
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"channels = (int) [ 1, 2 ]; "
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"audio/x-mulaw, "
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"rate = (int) [ 8000, 192000 ], " "channels = (int) [ 1, 2 ]")
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);
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/* AuParse signals and args */
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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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enum
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{
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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 GstElementStateReturn gst_auparse_change_state (GstElement * element);
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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 =
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g_type_register_static (GST_TYPE_ELEMENT, "GstAuParse", &auparse_info,
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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_static_pad_template_get (&gst_auparse_sink_template));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&gst_auparse_src_template));
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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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gstelement_class->change_state = gst_auparse_change_state;
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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 =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_auparse_sink_template), "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 = NULL;
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#if 0 /* FIXME: spider */
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_auparse_src_template), "src");
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gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
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gst_pad_use_explicit_caps (auparse->srcpad);
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#endif
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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 = 0, depth, ieee = 0;
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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) { /* ".snd" */
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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); /* Do not trust size, could be set to -1 : unknown */
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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) { /* other source say it is "dns." */
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head++;
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auparse->le = 1;
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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); /* Do not trust size, could be set to -1 : unknown */
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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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GST_DEBUG
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("offset %ld, size %ld, encoding %ld, frequency %ld, channels %ld",
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auparse->offset, auparse->size, auparse->encoding, auparse->frequency,
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auparse->channels);
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/*
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Docs :
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http://www.opengroup.org/public/pubs/external/auformat.html
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http://astronomy.swin.edu.au/~pbourke/dataformats/au/
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Solaris headers : /usr/include/audio/au.h
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libsndfile : src/au.c
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Samples :
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http://www.tsp.ece.mcgill.ca/MMSP/Documents/AudioFormats/AU/Samples.html
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*/
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switch (auparse->encoding) {
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case 1: /* 8-bit ISDN mu-law G.711 */
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law = 1;
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depth = 8;
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break;
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case 27: /* 8-bit ISDN A-law G.711 */
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law = 2;
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depth = 8;
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break;
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case 2: /* 8-bit linear PCM */
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depth = 8;
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break;
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case 3: /* 16-bit linear PCM */
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depth = 16;
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break;
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case 4: /* 24-bit linear PCM */
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depth = 24;
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break;
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case 5: /* 32-bit linear PCM */
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depth = 32;
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break;
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case 6: /* 32-bit IEEE floating point */
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ieee = 1;
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depth = 32;
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break;
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case 7: /* 64-bit IEEE floating point */
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ieee = 1;
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depth = 64;
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break;
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case 8: /* Fragmented sample data */
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case 9: /* AU_ENCODING_NESTED */
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case 10: /* DSP program */
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case 11: /* DSP 8-bit fixed point */
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case 12: /* DSP 16-bit fixed point */
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case 13: /* DSP 24-bit fixed point */
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case 14: /* DSP 32-bit fixed point */
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case 16: /* AU_ENCODING_DISPLAY : non-audio display data */
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case 17: /* AU_ENCODING_MULAW_SQUELCH */
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case 18: /* 16-bit linear with emphasis */
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case 19: /* 16-bit linear compressed (NeXT) */
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case 20: /* 16-bit linear with emphasis and compression */
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case 21: /* Music kit DSP commands */
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case 22: /* Music kit DSP commands samples */
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case 23: /* 4-bit CCITT G.721 ADPCM 32kbps -> modplug/libsndfile (compressed 8-bit mu-law) */
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case 24: /* 8-bit CCITT G.722 ADPCM -> rtp */
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case 25: /* 3-bit CCITT G.723.3 ADPCM 24kbps -> rtp/xine/modplug/libsndfile */
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case 26: /* 5-bit CCITT G.723.5 ADPCM 40kbps -> rtp/xine/modplug/libsndfile */
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default:
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GST_ELEMENT_ERROR (auparse, STREAM, FORMAT, (NULL), (NULL));
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gst_buffer_unref (buf);
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return;
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}
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auparse->srcpad =
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gst_pad_new_from_template (gst_static_pad_template_get
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(&gst_auparse_src_template), "src");
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gst_pad_use_explicit_caps (auparse->srcpad);
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if (law) {
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tempcaps =
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gst_caps_new_simple ((law == 1) ? "audio/x-mulaw" : "audio/x-alaw",
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"rate", G_TYPE_INT, auparse->frequency, "channels", G_TYPE_INT,
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auparse->channels, NULL);
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} else if (ieee) {
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tempcaps = gst_caps_new_simple ("audio/x-raw-float",
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"width", G_TYPE_INT, depth,
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"endianness", G_TYPE_INT,
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auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, NULL);
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} else {
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tempcaps = gst_caps_new_simple ("audio/x-raw-int",
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"endianness", G_TYPE_INT,
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auparse->le ? G_LITTLE_ENDIAN : G_BIG_ENDIAN, "rate", G_TYPE_INT,
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auparse->frequency, "channels", G_TYPE_INT, auparse->channels,
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"depth", G_TYPE_INT, depth, "width", G_TYPE_INT, depth, "signed",
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G_TYPE_BOOLEAN, TRUE, NULL);
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}
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if (!gst_pad_set_explicit_caps (auparse->srcpad, tempcaps)) {
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gst_buffer_unref (buf);
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gst_object_unref (GST_OBJECT (auparse->srcpad));
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auparse->srcpad = NULL;
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return;
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}
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gst_element_add_pad (GST_ELEMENT (auparse), auparse->srcpad);
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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 + (auparse->offset),
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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 GstElementStateReturn
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gst_auparse_change_state (GstElement * element)
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{
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GstAuParse *auparse = GST_AUPARSE (element);
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switch (GST_STATE_TRANSITION (element)) {
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case GST_STATE_PAUSED_TO_READY:
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if (auparse->srcpad) {
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gst_element_remove_pad (element, auparse->srcpad);
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auparse->srcpad = NULL;
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}
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break;
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default:
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break;
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}
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if (parent_class->change_state)
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return parent_class->change_state (element);
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return GST_STATE_SUCCESS;
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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 (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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"auparse",
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"parses au streams", plugin_init, VERSION, "GPL", GST_PACKAGE, GST_ORIGIN)
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