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fd8b04a8e7
Original commit message from CVS: Reviewed by: Ronald S. Bultje <rbultje@ronald.bitfreak.net> * gst/tta/gstttaparse.c: (gst_tta_src_event): Fix gcc-2.95 compile (#163485).
421 lines
13 KiB
C
421 lines
13 KiB
C
/* GStreamer TTA plugin
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* (c) 2004 Arwed v. Merkatz <v.merkatz@gmx.net>
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*
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* gstttaparse.c: TTA file parser
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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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#include <gst/gst.h>
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#include <math.h>
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#include "gstttaparse.h"
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#include "ttadec.h"
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#include "crc32.h"
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GST_DEBUG_CATEGORY_STATIC (gst_tta_parse_debug);
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#define GST_CAT_DEFAULT gst_tta_parse_debug
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/* Filter signals and args */
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enum
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{
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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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};
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static GstStaticPadTemplate sink_factory = 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-ttafile")
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);
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static GstStaticPadTemplate src_factory = 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 ("audio/x-tta, "
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"width = (int) { 8, 16, 24 }, "
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"channels = (int) { 1, 2 }, " "rate = (int) [ 8000, 96000 ]")
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);
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static void gst_tta_parse_class_init (GstTtaParseClass * klass);
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static void gst_tta_parse_base_init (GstTtaParseClass * klass);
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static void gst_tta_parse_init (GstTtaParse * ttaparse);
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static void gst_tta_parse_chain (GstPad * pad, GstData * in);
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static GstElementClass *parent = NULL;
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GType
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gst_tta_parse_get_type (void)
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{
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static GType plugin_type = 0;
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if (!plugin_type) {
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static const GTypeInfo plugin_info = {
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sizeof (GstTtaParseClass),
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(GBaseInitFunc) gst_tta_parse_base_init,
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NULL,
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(GClassInitFunc) gst_tta_parse_class_init,
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NULL,
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NULL,
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sizeof (GstTtaParse),
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0,
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(GInstanceInitFunc) gst_tta_parse_init,
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};
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plugin_type = g_type_register_static (GST_TYPE_ELEMENT,
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"GstTtaParse", &plugin_info, 0);
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}
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return plugin_type;
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}
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static void
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gst_tta_parse_base_init (GstTtaParseClass * klass)
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{
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static GstElementDetails plugin_details = {
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"TTA file parser",
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"Codec/Demuxer/Audio",
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"Parses TTA files",
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"Arwed v. Merkatz <v.merkatz@gmx.net>"
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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 (&src_factory));
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gst_element_class_add_pad_template (element_class,
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gst_static_pad_template_get (&sink_factory));
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gst_element_class_set_details (element_class, &plugin_details);
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}
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static void
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gst_tta_parse_dispose (GObject * object)
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{
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GstTtaParse *ttaparse = GST_TTA_PARSE (object);
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g_free (ttaparse->index);
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G_OBJECT_CLASS (parent)->dispose (object);
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}
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static void
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gst_tta_parse_class_init (GstTtaParseClass * 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 = g_type_class_ref (GST_TYPE_ELEMENT);
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gobject_class->dispose = gst_tta_parse_dispose;
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}
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static gboolean
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gst_tta_src_query (GstPad * pad, GstQueryType type,
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GstFormat * format, gint64 * value)
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{
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GstTtaParse *ttaparse = GST_TTA_PARSE (gst_pad_get_parent (pad));
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if (type == GST_QUERY_TOTAL) {
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if (*format == GST_FORMAT_TIME) {
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if ((ttaparse->data_length == 0) || (ttaparse->samplerate == 0)) {
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*value = 0;
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return FALSE;
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}
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*value =
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((gdouble) ttaparse->data_length / (gdouble) ttaparse->samplerate) *
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GST_SECOND;
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GST_DEBUG_OBJECT (ttaparse, "got queried for time, returned %lli",
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*value);
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return TRUE;
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}
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} else {
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return gst_pad_query_default (pad, type, format, value);
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}
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return FALSE;
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}
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static gboolean
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gst_tta_src_event (GstPad * pad, GstEvent * event)
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{
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GstTtaParse *ttaparse = GST_TTA_PARSE (gst_pad_get_parent (pad));
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_SEEK:
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{
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if (GST_EVENT_SEEK_FORMAT (event) == GST_FORMAT_TIME) {
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GstEvent *seek_event;
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guint64 time;
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guint64 seek_frame;
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guint64 seekpos;
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time = GST_EVENT_SEEK_OFFSET (event);
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seek_frame = time / (FRAME_TIME * 1000000000);
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seekpos = ttaparse->index[seek_frame].pos;
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GST_DEBUG_OBJECT (ttaparse, "seeking to %u", (guint) seekpos);
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seek_event =
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gst_event_new_seek (GST_FORMAT_BYTES | GST_SEEK_METHOD_SET |
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GST_SEEK_FLAG_ACCURATE, seekpos);
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gst_event_unref (event);
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if (gst_pad_send_event (GST_PAD_PEER (ttaparse->sinkpad), seek_event)) {
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gst_pad_event_default (ttaparse->srcpad,
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gst_event_new (GST_EVENT_FLUSH));
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return TRUE;
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} else {
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GST_LOG_OBJECT (ttaparse, "seek failed");
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return FALSE;
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}
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} else {
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return gst_pad_send_event (pad, event);
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}
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break;
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}
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default:
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return gst_pad_send_event (pad, event);
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break;
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}
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}
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static void
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gst_tta_parse_init (GstTtaParse * ttaparse)
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{
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GstElementClass *klass = GST_ELEMENT_GET_CLASS (ttaparse);
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ttaparse->sinkpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"sink"), "sink");
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ttaparse->srcpad =
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gst_pad_new_from_template (gst_element_class_get_pad_template (klass,
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"src"), "src");
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gst_pad_use_explicit_caps (ttaparse->srcpad);
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gst_pad_set_query_function (ttaparse->srcpad, gst_tta_src_query);
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gst_pad_set_event_function (ttaparse->srcpad, gst_tta_src_event);
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gst_element_add_pad (GST_ELEMENT (ttaparse), ttaparse->sinkpad);
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gst_element_add_pad (GST_ELEMENT (ttaparse), ttaparse->srcpad);
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gst_pad_set_chain_function (ttaparse->sinkpad, gst_tta_parse_chain);
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ttaparse->silent = FALSE;
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ttaparse->header_parsed = FALSE;
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ttaparse->partialbuf = NULL;
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ttaparse->seek_ok = FALSE;
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ttaparse->current_frame = 0;
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ttaparse->data_length = 0;
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ttaparse->samplerate = 0;
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GST_FLAG_SET (ttaparse, GST_ELEMENT_EVENT_AWARE);
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}
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static void
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gst_tta_handle_event (GstPad * pad, GstBuffer * buffer)
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{
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GstEvent *event = GST_EVENT (buffer);
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GstTtaParse *ttaparse = GST_TTA_PARSE (gst_pad_get_parent (pad));
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GST_DEBUG_OBJECT (ttaparse, "got some event");
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_DISCONTINUOUS:
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{
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GstEvent *discont;
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guint64 offset = GST_EVENT_DISCONT_OFFSET (event, 0).value;
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int i;
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GST_DEBUG_OBJECT (ttaparse, "discont with offset: %u", offset);
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for (i = 0; i < ttaparse->num_frames; i++) {
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if (offset == ttaparse->index[i].pos) {
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GST_DEBUG_OBJECT (ttaparse, "setting current frame to %i", i);
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discont = gst_event_new_discontinuous (FALSE,
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GST_FORMAT_TIME, ttaparse->index[i].time, NULL);
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gst_event_unref (event);
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gst_buffer_unref (ttaparse->partialbuf);
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ttaparse->partialbuf = NULL;
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ttaparse->current_frame = i;
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gst_pad_event_default (pad, gst_event_new (GST_EVENT_FLUSH));
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gst_pad_event_default (pad, discont);
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GST_DEBUG_OBJECT (ttaparse, "sent discont event");
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return;
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}
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}
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break;
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}
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default:
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gst_pad_event_default (pad, event);
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break;
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}
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}
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static void
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gst_tta_parse_chain (GstPad * pad, GstData * in)
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{
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GstTtaParse *ttaparse;
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GstBuffer *outbuf, *buf = GST_BUFFER (in);
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guchar *data;
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gint i;
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guint64 size, offset = 0;
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GstCaps *caps;
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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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ttaparse = GST_TTA_PARSE (GST_OBJECT_PARENT (pad));
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g_return_if_fail (GST_IS_TTA_PARSE (ttaparse));
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if (GST_IS_EVENT (buf)) {
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gst_tta_handle_event (pad, buf);
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return;
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}
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if (ttaparse->partialbuf) {
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GstBuffer *newbuf;
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newbuf = gst_buffer_merge (ttaparse->partialbuf, buf);
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gst_buffer_unref (buf);
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gst_buffer_unref (ttaparse->partialbuf);
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ttaparse->partialbuf = newbuf;
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} else {
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ttaparse->partialbuf = buf;
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}
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size = GST_BUFFER_SIZE (ttaparse->partialbuf);
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data = GST_BUFFER_DATA (ttaparse->partialbuf);
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if (!ttaparse->header_parsed) {
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if ((*data == 'T') && (*(data + 1) == 'T') && (*(data + 2) == 'A')) {
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double frame_length;
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int num_frames;
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guint32 datasize = 0;
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guint32 crc;
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offset = offset + 4;
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offset = offset + 2;
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ttaparse->channels = GST_READ_UINT16_LE (data + offset);
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offset = offset + 2;
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ttaparse->bits = GST_READ_UINT16_LE (data + offset);
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offset += 2;
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ttaparse->samplerate = GST_READ_UINT32_LE (data + offset);
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frame_length = FRAME_TIME * ttaparse->samplerate;
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offset += 4;
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ttaparse->data_length = GST_READ_UINT32_LE (data + offset);
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offset += 4;
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num_frames = (ttaparse->data_length / frame_length) + 1;
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crc = crc32 (data, 18);
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if (crc != GST_READ_UINT32_LE (data + offset)) {
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GST_WARNING_OBJECT (ttaparse, "Header CRC wrong!");
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}
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offset += 4;
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GST_INFO_OBJECT (ttaparse,
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"channels: %u, bits: %u, samplerate: %u, data_length: %u, num_frames: %u",
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ttaparse->channels, ttaparse->bits, ttaparse->samplerate,
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ttaparse->data_length, num_frames);
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ttaparse->index =
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(GstTtaIndex *) g_malloc (num_frames * sizeof (GstTtaIndex));
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ttaparse->num_frames = num_frames;
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for (i = 0; i < num_frames; i++) {
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ttaparse->index[i].size = GST_READ_UINT32_LE (data + offset);
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ttaparse->index[i].pos = GST_BUFFER_OFFSET (ttaparse->partialbuf) + (num_frames) * 4 + 4 + datasize + 22; // 22 == header size, +4 for the TTA1
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ttaparse->index[i].time = i * FRAME_TIME * 1000000000;
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offset += 4;
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datasize += ttaparse->index[i].size;
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}
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GST_DEBUG_OBJECT (ttaparse, "Datasize: %u", datasize);
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crc = crc32 (data + 22, num_frames * 4);
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if (crc != GST_READ_UINT32_LE (data + offset)) {
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GST_WARNING_OBJECT (ttaparse, "Seek table CRC wrong!");
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} else {
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ttaparse->seek_ok = TRUE;
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/*
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g_print("allowing seeking!\n");
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g_print("dumping index:\n");
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for (i = 0; i < ttaparse->num_frames; i++) {
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g_print("frame %u: offset = %llu, time=%llu, size=%u\n",
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i,
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ttaparse->index[i].pos,
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ttaparse->index[i].time,
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ttaparse->index[i].size);
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}
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*/
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}
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offset += 4;
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ttaparse->header_parsed = TRUE;
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caps = gst_caps_new_simple ("audio/x-tta",
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"width", G_TYPE_INT, ttaparse->bits,
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"channels", G_TYPE_INT, ttaparse->channels,
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"rate", G_TYPE_INT, ttaparse->samplerate, NULL);
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gst_pad_set_explicit_caps (ttaparse->srcpad, caps);
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}
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}
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i = ttaparse->current_frame;
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while (size - offset >= ttaparse->index[i].size) {
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guint32 crc;
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crc = crc32 (data + offset, ttaparse->index[i].size - 4);
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if (crc != GST_READ_UINT32_LE (data + offset + ttaparse->index[i].size - 4)) {
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GST_WARNING_OBJECT (ttaparse, "Frame %u corrupted :(", i);
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GST_WARNING_OBJECT (ttaparse, "calculated crc: %u, got crc: %u", crc,
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GST_READ_UINT32_LE (data + offset + ttaparse->index[i].size - 4));
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}
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outbuf =
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gst_buffer_create_sub (ttaparse->partialbuf, offset,
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ttaparse->index[i].size - 4);
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GST_BUFFER_TIMESTAMP (outbuf) = ttaparse->index[i].time;
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if (ttaparse->current_frame + 1 == ttaparse->num_frames) {
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guint32 samples =
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ttaparse->data_length % (gint64) (ttaparse->samplerate * FRAME_TIME);
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gdouble frametime = (gdouble) samples / (gdouble) ttaparse->samplerate;
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GST_BUFFER_DURATION (outbuf) = (guint64) (frametime * GST_SECOND);
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} else {
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GST_BUFFER_DURATION (outbuf) = FRAME_TIME * 1000000000;
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}
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gst_pad_push (ttaparse->srcpad, GST_DATA (outbuf));
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offset += ttaparse->index[i].size;
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ttaparse->current_frame++;
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i = ttaparse->current_frame;
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}
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if (size - offset > 0) {
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glong remainder = size - offset;
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outbuf = gst_buffer_create_sub (ttaparse->partialbuf, offset, remainder);
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gst_buffer_unref (ttaparse->partialbuf);
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ttaparse->partialbuf = outbuf;
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} else {
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gst_buffer_unref (ttaparse->partialbuf);
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ttaparse->partialbuf = NULL;
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}
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}
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gboolean
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gst_tta_parse_plugin_init (GstPlugin * plugin)
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{
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if (!gst_element_register (plugin, "ttaparse",
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GST_RANK_PRIMARY, GST_TYPE_TTA_PARSE)) {
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return FALSE;
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}
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GST_DEBUG_CATEGORY_INIT (gst_tta_parse_debug, "ttaparse", 0,
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"tta file parser");
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return TRUE;
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}
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