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557 lines
16 KiB
C
557 lines
16 KiB
C
/* Copyright (C) 2004-2005 Michael Pyne <michael dot pyne at kdemail net>
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* Copyright (C) 2004-2006 Chris Lee <clee at kde org>
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* Copyright (C) 2007 Brian Koropoff <bkoropoff at gmail com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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 "gstspc.h"
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#include <gst/audio/audio.h>
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#include <string.h>
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#include <glib/gprintf.h>
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#include <glib.h>
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static GstStaticPadTemplate sink_factory =
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GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-spc"));
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static GstStaticPadTemplate src_factory =
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GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("audio/x-raw, "
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"format = (string) " GST_AUDIO_NE (S16) ", "
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"layout = (string) interleaved, "
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"rate = (int) 32000, " "channels = (int) 2"));
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#define gst_spc_dec_parent_class parent_class
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G_DEFINE_TYPE (GstSpcDec, gst_spc_dec, GST_TYPE_ELEMENT);
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static GstFlowReturn gst_spc_dec_chain (GstPad * pad, GstObject * parent,
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GstBuffer * buffer);
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static gboolean gst_spc_dec_sink_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean gst_spc_dec_src_event (GstPad * pad, GstObject * parent,
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GstEvent * event);
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static gboolean gst_spc_dec_src_query (GstPad * pad, GstObject * parent,
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GstQuery * query);
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static GstStateChangeReturn gst_spc_dec_change_state (GstElement * element,
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GstStateChange transition);
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static void spc_play (GstPad * pad);
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static void gst_spc_dec_dispose (GObject * object);
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static gboolean spc_setup (GstSpcDec * spc);
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static gboolean
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spc_negotiate (GstSpcDec * spc)
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{
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GstCaps *caps;
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caps = gst_pad_get_pad_template_caps (spc->srcpad);
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gst_pad_set_caps (spc->srcpad, caps);
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gst_caps_unref (caps);
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return TRUE;
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}
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static void
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gst_spc_dec_class_init (GstSpcDecClass * klass)
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{
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GstElementClass *element_class = (GstElementClass *) klass;
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GObjectClass *gobject_class = (GObjectClass *) klass;
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gst_element_class_set_static_metadata (element_class, "OpenSPC SPC decoder",
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"Codec/Audio/Decoder",
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"Uses OpenSPC to emulate an SPC processor",
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"Chris Lee <clee@kde.org>, Brian Koropoff <bkoropoff@gmail.com>");
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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_add_pad_template (element_class,
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gst_static_pad_template_get (&src_factory));
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element_class->change_state = GST_DEBUG_FUNCPTR (gst_spc_dec_change_state);
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gobject_class->dispose = gst_spc_dec_dispose;
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}
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static void
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gst_spc_dec_init (GstSpcDec * spc)
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{
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spc->sinkpad = gst_pad_new_from_static_template (&sink_factory, "sink");
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/* gst_pad_set_query_function (spc->sinkpad, NULL); */
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gst_pad_set_event_function (spc->sinkpad, gst_spc_dec_sink_event);
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gst_pad_set_chain_function (spc->sinkpad, gst_spc_dec_chain);
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gst_element_add_pad (GST_ELEMENT (spc), spc->sinkpad);
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spc->srcpad = gst_pad_new_from_static_template (&src_factory, "src");
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gst_pad_set_event_function (spc->srcpad, gst_spc_dec_src_event);
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gst_pad_set_query_function (spc->srcpad, gst_spc_dec_src_query);
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gst_pad_use_fixed_caps (spc->srcpad);
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gst_element_add_pad (GST_ELEMENT (spc), spc->srcpad);
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spc->buf = NULL;
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spc->initialized = FALSE;
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spc_tag_clear (&spc->tag_info);
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}
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static void
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gst_spc_dec_dispose (GObject * object)
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{
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GstSpcDec *spc = GST_SPC_DEC (object);
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if (spc->buf) {
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gst_buffer_unref (spc->buf);
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spc->buf = NULL;
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}
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spc_tag_free (&spc->tag_info);
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GST_CALL_PARENT (G_OBJECT_CLASS, dispose, (object));
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}
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static GstFlowReturn
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gst_spc_dec_chain (GstPad * pad, GstObject * parent, GstBuffer * buffer)
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{
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GstSpcDec *spc = GST_SPC_DEC (parent);
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if (spc->buf) {
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spc->buf = gst_buffer_append (spc->buf, buffer);
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} else {
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spc->buf = buffer;
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}
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return GST_FLOW_OK;
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}
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static gboolean
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gst_spc_dec_sink_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstSpcDec *spc = GST_SPC_DEC (parent);
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gboolean result = TRUE;
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gboolean forward = FALSE;
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switch (GST_EVENT_TYPE (event)) {
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case GST_EVENT_EOS:
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/* we get EOS when we loaded the complete file, now try to initialize the
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* decoding */
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if (!(result = spc_setup (spc))) {
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/* can't start, post an ERROR and push EOS downstream */
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GST_ELEMENT_ERROR (spc, STREAM, DEMUX, (NULL),
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("can't start playback"));
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forward = TRUE;
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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 (forward)
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result = gst_pad_push_event (spc->srcpad, event);
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else
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gst_event_unref (event);
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return result;
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}
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static gint64
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gst_spc_duration (GstSpcDec * spc)
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{
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gint64 total_ticks =
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spc->tag_info.time_intro +
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spc->tag_info.time_loop * spc->tag_info.loop_count +
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spc->tag_info.time_end;
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if (total_ticks) {
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return (gint64) gst_util_uint64_scale (total_ticks, GST_SECOND, 64000);
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} else if (spc->tag_info.time_seconds) {
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gint64 time = (gint64) spc->tag_info.time_seconds * GST_SECOND;
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return time;
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} else {
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return (gint64) (3 * 60) * GST_SECOND;
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}
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}
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static gint64
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gst_spc_fadeout (GstSpcDec * spc)
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{
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if (spc->tag_info.time_fade) {
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return (gint64) gst_util_uint64_scale ((guint64) spc->tag_info.time_fade,
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GST_SECOND, 64000);
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} else if (spc->tag_info.time_fade_milliseconds) {
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return (gint64) (spc->tag_info.time_fade_milliseconds * GST_MSECOND);
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} else {
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return 10 * GST_SECOND;
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}
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}
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static gboolean
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gst_spc_dec_src_event (GstPad * pad, GstObject * parent, GstEvent * event)
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{
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GstSpcDec *spc = GST_SPC_DEC (parent);
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gboolean result = FALSE;
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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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gdouble rate;
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GstFormat format;
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GstSeekFlags flags;
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GstSeekType start_type, stop_type;
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gint64 start, stop;
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gboolean flush;
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gst_event_parse_seek (event, &rate, &format, &flags, &start_type, &start,
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&stop_type, &stop);
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if (format != GST_FORMAT_TIME) {
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GST_DEBUG_OBJECT (spc, "seeking is only supported in TIME format");
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break;
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}
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if (start_type != GST_SEEK_TYPE_SET || stop_type != GST_SEEK_TYPE_NONE) {
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GST_DEBUG_OBJECT (spc, "unsupported seek type");
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break;
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}
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if (stop_type == GST_SEEK_TYPE_NONE)
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stop = GST_CLOCK_TIME_NONE;
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if (start_type == GST_SEEK_TYPE_SET) {
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GstSegment seg;
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guint64 cur =
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gst_util_uint64_scale (spc->byte_pos, GST_SECOND, 32000 * 2 * 2);
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guint64 dest = (guint64) start;
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dest = CLAMP (dest, 0, gst_spc_duration (spc) + gst_spc_fadeout (spc));
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if (dest == cur)
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break;
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flush = (flags & GST_SEEK_FLAG_FLUSH) == GST_SEEK_FLAG_FLUSH;
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if (flush) {
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gst_pad_push_event (spc->srcpad, gst_event_new_flush_start ());
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} else {
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gst_pad_stop_task (spc->srcpad);
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}
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GST_PAD_STREAM_LOCK (spc->srcpad);
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if (flags & GST_SEEK_FLAG_SEGMENT) {
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gst_element_post_message (GST_ELEMENT (spc),
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gst_message_new_segment_start (GST_OBJECT (spc), format, cur));
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}
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if (flush) {
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gst_pad_push_event (spc->srcpad, gst_event_new_flush_stop (TRUE));
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}
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if (stop == GST_CLOCK_TIME_NONE)
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stop = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));
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gst_segment_init (&seg, GST_FORMAT_TIME);
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seg.rate = rate;
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seg.start = dest;
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seg.stop = stop;
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seg.time = dest;
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gst_pad_push_event (spc->srcpad, gst_event_new_segment (&seg));
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/* spc->byte_pos += OSPC_Run(-1, NULL, (unsigned int) (gst_util_uint64_scale(dest - cur, 32000*2*2, GST_SECOND))); */
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spc->seekpoint =
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gst_util_uint64_scale (dest, 32000 * 2 * 2, GST_SECOND);
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spc->seeking = TRUE;
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gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play,
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spc->srcpad, NULL);
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GST_PAD_STREAM_UNLOCK (spc->srcpad);
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result = TRUE;
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}
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break;
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}
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default:
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break;
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}
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return result;
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}
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static gboolean
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gst_spc_dec_src_query (GstPad * pad, GstObject * parent, GstQuery * query)
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{
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GstSpcDec *spc = GST_SPC_DEC (parent);
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gboolean result = TRUE;
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switch (GST_QUERY_TYPE (query)) {
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case GST_QUERY_DURATION:
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{
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GstFormat format;
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gst_query_parse_duration (query, &format, NULL);
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if (!spc->initialized || format != GST_FORMAT_TIME) {
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result = FALSE;
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break;
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}
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gst_query_set_duration (query, GST_FORMAT_TIME,
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gst_spc_duration (spc) + gst_spc_fadeout (spc));
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break;
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}
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case GST_QUERY_POSITION:
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{
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GstFormat format;
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gst_query_parse_position (query, &format, NULL);
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if (!spc->initialized || format != GST_FORMAT_TIME) {
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result = FALSE;
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break;
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}
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gst_query_set_position (query, GST_FORMAT_TIME,
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(gint64) gst_util_uint64_scale (spc->byte_pos, GST_SECOND,
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32000 * 2 * 2));
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break;
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}
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default:
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result = gst_pad_query_default (pad, parent, query);
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break;
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}
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return result;
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}
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static void
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spc_play (GstPad * pad)
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{
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GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
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GstFlowReturn flow_return;
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GstBuffer *out;
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gboolean seeking = spc->seeking;
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gint64 duration, fade, end, position;
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GstMapInfo map;
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if (!seeking) {
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out = gst_buffer_new_and_alloc (1600 * 4);
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GST_BUFFER_TIMESTAMP (out) =
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(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
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32000 * 2 * 2);
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gst_buffer_map (out, &map, GST_MAP_WRITE);
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spc->byte_pos += OSPC_Run (-1, (short *) map.data, 1600 * 4);
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gst_buffer_unmap (out, &map);
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} else {
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if (spc->seekpoint < spc->byte_pos) {
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gst_buffer_map (spc->buf, &map, GST_MAP_WRITE);
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OSPC_Init (map.data, map.size);
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gst_buffer_unmap (spc->buf, &map);
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spc->byte_pos = 0;
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}
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spc->byte_pos += OSPC_Run (-1, NULL, 1600 * 4);
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if (spc->byte_pos >= spc->seekpoint) {
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spc->seeking = FALSE;
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}
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out = gst_buffer_new ();
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}
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duration = gst_spc_duration (spc);
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fade = gst_spc_fadeout (spc);
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end = duration + fade;
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position =
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(gint64) gst_util_uint64_scale ((guint64) spc->byte_pos, GST_SECOND,
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32000 * 2 * 2);
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if (position >= duration) {
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gint16 *data;
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guint32 size;
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unsigned int i;
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gint64 num;
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gst_buffer_map (out, &map, GST_MAP_WRITE);
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data = (gint16 *) map.data;
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size = map.size / sizeof (gint16);
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num = (fade - (position - duration));
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for (i = 0; i < size; i++) {
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/* Apply a parabolic volume envelope */
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data[i] = (gint16) (data[i] * num / fade * num / fade);
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}
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}
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if ((flow_return = gst_pad_push (spc->srcpad, out)) != GST_FLOW_OK) {
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GST_DEBUG_OBJECT (spc, "pausing task, reason %s",
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gst_flow_get_name (flow_return));
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gst_pad_pause_task (pad);
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if (flow_return <= GST_FLOW_EOS || flow_return == GST_FLOW_NOT_LINKED) {
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gst_pad_push_event (pad, gst_event_new_eos ());
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}
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}
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if (position >= end) {
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gst_pad_pause_task (pad);
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gst_pad_push_event (pad, gst_event_new_eos ());
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}
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gst_object_unref (spc);
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return;
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}
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static gboolean
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spc_setup (GstSpcDec * spc)
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{
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spc_tag_info *info;
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GstTagList *taglist;
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guint64 total_duration;
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GstSegment seg;
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GstMapInfo map;
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if (!spc->buf || !spc_negotiate (spc)) {
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return FALSE;
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}
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info = &(spc->tag_info);
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gst_buffer_map (spc->buf, &map, GST_MAP_READ);
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spc_tag_get_info (map.data, map.size, info);
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taglist = gst_tag_list_new_empty ();
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if (info->title)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TITLE,
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info->title, NULL);
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if (info->artist)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ARTIST,
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info->artist, NULL);
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/* Prefer the name of the official soundtrack over the name of the game (since this is
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* how track numbers are derived)
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*/
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if (info->album)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM,
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info->album, NULL);
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else if (info->game)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ALBUM, info->game,
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NULL);
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if (info->year) {
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GstDateTime *dt = gst_date_time_new_y (info->year);
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_DATE_TIME, dt,
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NULL);
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gst_date_time_unref (dt);
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}
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if (info->track) {
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_TRACK_NUMBER,
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info->track, NULL);
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}
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if (info->comment)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_COMMENT,
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info->comment, NULL);
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if (info->disc)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
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GST_TAG_ALBUM_VOLUME_NUMBER, info->disc, NULL);
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if (info->publisher)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ORGANIZATION,
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info->publisher, NULL);
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if (info->dumper)
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gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_CONTACT,
|
|
info->dumper, NULL);
|
|
if (info->emulator)
|
|
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE, GST_TAG_ENCODER,
|
|
info->emulator == EMU_ZSNES ? "ZSNES" : "Snes9x", NULL);
|
|
|
|
total_duration = (guint64) (gst_spc_duration (spc) + gst_spc_fadeout (spc));
|
|
|
|
gst_tag_list_add (taglist, GST_TAG_MERGE_REPLACE,
|
|
GST_TAG_DURATION, total_duration,
|
|
GST_TAG_GENRE, "Game", GST_TAG_CODEC, "SPC700", NULL);
|
|
|
|
gst_pad_push_event (spc->srcpad, gst_event_new_tag (taglist));
|
|
|
|
/* spc_tag_info_free(&info); */
|
|
|
|
|
|
if (OSPC_Init (map.data, map.size) != 0) {
|
|
gst_buffer_unmap (spc->buf, &map);
|
|
return FALSE;
|
|
}
|
|
gst_buffer_unmap (spc->buf, &map);
|
|
|
|
gst_segment_init (&seg, GST_FORMAT_TIME);
|
|
gst_pad_push_event (spc->srcpad, gst_event_new_segment (&seg));
|
|
|
|
gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play, spc->srcpad,
|
|
NULL);
|
|
|
|
/* We can't unreference this buffer because we might need to re-initialize
|
|
* the emulator with the original data during a reverse seek
|
|
* gst_buffer_unref (spc->buf);
|
|
* spc->buf = NULL;
|
|
*/
|
|
spc->initialized = TRUE;
|
|
spc->seeking = FALSE;
|
|
spc->seekpoint = 0;
|
|
spc->byte_pos = 0;
|
|
return spc->initialized;
|
|
}
|
|
|
|
static GstStateChangeReturn
|
|
gst_spc_dec_change_state (GstElement * element, GstStateChange transition)
|
|
{
|
|
GstStateChangeReturn result;
|
|
GstSpcDec *dec;
|
|
|
|
dec = GST_SPC_DEC (element);
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_READY_TO_PAUSED:
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
result =
|
|
GST_ELEMENT_CLASS (gst_spc_dec_parent_class)->change_state (element,
|
|
transition);
|
|
if (result == GST_STATE_CHANGE_FAILURE)
|
|
return result;
|
|
|
|
switch (transition) {
|
|
case GST_STATE_CHANGE_PAUSED_TO_READY:
|
|
if (dec->buf) {
|
|
gst_buffer_unref (dec->buf);
|
|
dec->buf = NULL;
|
|
}
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return result;
|
|
}
|
|
|
|
static gboolean
|
|
plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "spcdec", GST_RANK_SECONDARY,
|
|
GST_TYPE_SPC_DEC);
|
|
}
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
GST_VERSION_MINOR,
|
|
spcdec,
|
|
"OpenSPC Audio Decoder",
|
|
plugin_init, VERSION, "LGPL", GST_PACKAGE_NAME, GST_PACKAGE_ORIGIN);
|