Add libopenspc-based SPC decoder element (#348220).

Original commit message from CVS:
Patch by: Chris Lee  <clee at kde org>
* configure.ac:
* ext/Makefile.am:
* ext/spc/Makefile.am:
* ext/spc/gstspc.c: (spc_negotiate), (gst_spc_dec_base_init),
(gst_spc_dec_class_init), (gst_spc_dec_init), (gst_spc_dec_chain),
(gst_spc_dec_sink_event), (gst_spc_dec_src_event),
(gst_spc_dec_src_query), (spc_play), (spc_setup),
(gst_spc_dec_change_state), (plugin_init):
* ext/spc/gstspc.h:
Add libopenspc-based SPC decoder element (#348220).

3 files changed, 416 insertions, 0 deletions

diff --git a/ext/spc/Makefile.am b/ext/spc/Makefile.am
new file mode 100644
index 00000000..18a878b2
--- /dev/null
+++ b/ext/spc/Makefile.am
@@ -0,0 +1,9 @@
+plugin_LTLIBRARIES = libgstspc.la
+
+libgstspc_la_SOURCES = gstspc.c
+
+libgstspc_la_CFLAGS = $(GST_CFLAGS) $(SPC_CFLAGS)
+libgstspc_la_LIBADD = $(GST_LIBS) $(SPC_LIBS)
+libgstspc_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = gstspc.h
diff --git a/ext/spc/gstspc.c b/ext/spc/gstspc.c
new file mode 100644
index 00000000..2c5e0180
--- /dev/null
+++ b/ext/spc/gstspc.c
@@ -0,0 +1,346 @@
+/* Copyright (C) 2004-2005 Michael Pyne <michael dot pyne at kdemail net>
+ * Copyright (C) 2004-2006 Chris Lee <clee at kde org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "gstspc.h"
+
+#include <string.h>
+
+static const GstElementDetails gst_spc_dec_details =
+GST_ELEMENT_DETAILS ("OpenSPC SPC decoder",
+    "Codec/Audio/Decoder",
+    "Uses OpenSPC to emulate an SPC processor",
+    "Chris Lee <clee@kde.org>");
+
+static GstStaticPadTemplate sink_factory =
+GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-spc"));
+
+static GstStaticPadTemplate src_factory =
+GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-int, "
+        "endianness = (int) BYTE_ORDER, "
+        "signed = (boolean) TRUE, "
+        "width = (int) 16, "
+        "depth = (int) 16, " "rate = (int) 32000, " "channels = (int) 2"));
+
+GST_BOILERPLATE (GstSpcDec, gst_spc_dec, GstElement, GST_TYPE_ELEMENT);
+
+static GstFlowReturn gst_spc_dec_chain (GstPad * pad, GstBuffer * buffer);
+static gboolean gst_spc_dec_sink_event (GstPad * pad, GstEvent * event);
+static gboolean gst_spc_dec_src_event (GstPad * pad, GstEvent * event);
+static gboolean gst_spc_dec_src_query (GstPad * pad, GstQuery * query);
+static GstStateChangeReturn gst_spc_dec_change_state (GstElement * element,
+    GstStateChange transition);
+static void spc_play (GstPad * pad);
+static gboolean spc_setup (GstSpcDec * spc);
+
+static gboolean
+spc_negotiate (GstSpcDec * spc)
+{
+  GstCaps *allowed, *caps;
+  GstStructure *structure;
+  gint width = 16, depth = 16;
+  gboolean sign;
+  int rate = 32000;
+  int channels = 2;
+
+  allowed = gst_pad_get_allowed_caps (spc->srcpad);
+  if (!allowed) {
+    GST_DEBUG_OBJECT (spc, "couldn't get allowed caps");
+    return FALSE;
+  }
+
+  GST_DEBUG_OBJECT (spc, "allowed caps: %" GST_PTR_FORMAT, allowed);
+
+  structure = gst_caps_get_structure (allowed, 0);
+  gst_structure_get_int (structure, "width", &width);
+  gst_structure_get_int (structure, "depth", &depth);
+
+  if (width && depth && width != depth) {
+    GST_DEBUG_OBJECT (spc, "width %d and depth %d are different", width, depth);
+    gst_caps_unref (allowed);
+    return FALSE;
+  }
+
+  gst_structure_get_boolean (structure, "signed", &sign);
+  gst_structure_get_int (structure, "rate", &rate);
+  gst_structure_get_int (structure, "channels", &channels);
+
+  caps = gst_caps_new_simple ("audio/x-raw-int",
+      "endianness", G_TYPE_INT, G_BYTE_ORDER,
+      "signed", G_TYPE_BOOLEAN, TRUE,
+      "width", G_TYPE_INT, width,
+      "depth", G_TYPE_INT, depth,
+      "rate", G_TYPE_INT, rate, "channels", G_TYPE_INT, channels, NULL);
+  gst_pad_set_caps (spc->srcpad, caps);
+
+  gst_caps_unref (caps);
+  gst_caps_unref (allowed);
+
+  return TRUE;
+}
+
+static void
+gst_spc_dec_base_init (gpointer g_class)
+{
+  GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
+
+  gst_element_class_set_details (element_class, &gst_spc_dec_details);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_factory));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_factory));
+}
+
+static void
+gst_spc_dec_class_init (GstSpcDecClass * klass)
+{
+  GstElementClass *element_class = (GstElementClass *) klass;
+
+  element_class->change_state = GST_DEBUG_FUNCPTR (gst_spc_dec_change_state);
+}
+
+static void
+gst_spc_dec_init (GstSpcDec * spc, GstSpcDecClass * klass)
+{
+  spc->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_factory),
+      "sink");
+  gst_pad_set_query_function (spc->sinkpad, NULL);
+  gst_pad_set_event_function (spc->sinkpad, gst_spc_dec_sink_event);
+  gst_pad_set_chain_function (spc->sinkpad, gst_spc_dec_chain);
+  gst_element_add_pad (GST_ELEMENT (spc), spc->sinkpad);
+
+  spc->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_factory),
+      "src");
+  gst_pad_set_event_function (spc->srcpad, gst_spc_dec_src_event);
+  gst_pad_set_query_function (spc->srcpad, gst_spc_dec_src_query);
+  gst_pad_use_fixed_caps (spc->srcpad);
+  gst_element_add_pad (GST_ELEMENT (spc), spc->srcpad);
+
+  spc->buf = NULL;
+  spc->initialized = FALSE;
+}
+
+static GstFlowReturn
+gst_spc_dec_chain (GstPad * pad, GstBuffer * buffer)
+{
+  GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
+
+  if (spc->buf) {
+    spc->buf = gst_buffer_join (spc->buf, buffer);
+  } else {
+    spc->buf = buffer;
+  }
+
+  gst_object_unref (spc);
+
+  return GST_FLOW_OK;
+}
+
+static gboolean
+gst_spc_dec_sink_event (GstPad * pad, GstEvent * event)
+{
+  GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
+  gboolean result;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_EOS:
+      result = spc_setup (spc);
+      break;
+    case GST_EVENT_NEWSEGMENT:
+      result = FALSE;
+      break;
+    default:
+      result = FALSE;
+      break;
+  }
+
+  gst_event_unref (event);
+  gst_object_unref (spc);
+
+  return result;
+}
+
+static gboolean
+gst_spc_dec_src_event (GstPad * pad, GstEvent * event)
+{
+  GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
+  gboolean result = FALSE;
+
+  switch (GST_EVENT_TYPE (event)) {
+    default:
+      break;
+  }
+
+  gst_event_unref (event);
+  gst_object_unref (spc);
+
+  return result;
+}
+
+static gboolean
+gst_spc_dec_src_query (GstPad * pad, GstQuery * query)
+{
+  GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
+  gboolean result = TRUE;
+
+  switch (GST_QUERY_TYPE (query)) {
+    default:
+      result = gst_pad_query_default (pad, query);
+      break;
+  }
+
+  gst_object_unref (spc);
+
+  return result;
+}
+
+static void
+spc_play (GstPad * pad)
+{
+  GstSpcDec *spc = GST_SPC_DEC (gst_pad_get_parent (pad));
+  GstFlowReturn flow_return;
+  GstBuffer *out;
+
+  out = gst_buffer_new_and_alloc (1600 * 4);
+  gst_buffer_set_caps (out, GST_PAD_CAPS (pad));
+
+  OSPC_Run (-1, (short *) GST_BUFFER_DATA (out), 1600 * 4);
+
+  if ((flow_return = gst_pad_push (spc->srcpad, out)) != GST_FLOW_OK) {
+    const gchar *reason = gst_flow_get_name (flow_return);
+
+    GST_DEBUG_OBJECT (spc, "pausing task, reason %s", reason);
+
+    gst_pad_pause_task (pad);
+
+    if (GST_FLOW_IS_FATAL (flow_return) || flow_return == GST_FLOW_NOT_LINKED) {
+      gst_pad_push_event (pad, gst_event_new_eos ());
+    }
+  }
+
+  gst_object_unref (spc);
+
+  return;
+}
+
+static gboolean
+spc_setup (GstSpcDec * spc)
+{
+  guchar *data = GST_BUFFER_DATA (spc->buf);
+  gboolean text_format = FALSE;
+
+  if (!spc_negotiate (spc)) {
+    return FALSE;
+  }
+
+  if (data[0x23] == 26) {
+    GstEvent *tagevent;
+    GstTagList *taglist = gst_tag_list_new ();
+
+    if (data[0xA0] == '/')
+      text_format = TRUE;
+
+    gchar spctitle[0x21];
+    gchar spcartist[0x21];
+    gchar spcgame[0x21];
+
+    strncpy (spctitle, (gchar *) & data[0x2E], 32);
+    strncpy (spcartist, (gchar *) & data[(text_format ? 0xB1 : 0xB0)], 32);
+    strncpy (spcgame, (gchar *) & data[0x4E], 32);
+
+    spctitle[0x20] = '\0';
+    spcartist[0x20] = '\0';
+    spcgame[0x20] = '\0';
+
+    gst_tag_list_add (taglist, GST_TAG_MERGE_APPEND,
+        GST_TAG_TITLE, spctitle,
+        GST_TAG_ARTIST, spcartist, GST_TAG_ALBUM, spcgame, NULL);
+
+    tagevent = gst_event_new_tag (taglist);
+    gst_element_found_tags_for_pad (GST_ELEMENT (spc), spc->srcpad, taglist);
+  }
+
+  if (OSPC_Init (GST_BUFFER_DATA (spc->buf), GST_BUFFER_SIZE (spc->buf)) != 0) {
+    return FALSE;
+  }
+
+  gst_pad_push_event (spc->srcpad, gst_event_new_new_segment (FALSE, 1.0,
+          GST_FORMAT_TIME, 0, -1, 0));
+
+  gst_pad_start_task (spc->srcpad, (GstTaskFunction) spc_play, spc->srcpad);
+
+  gst_buffer_unref (spc->buf);
+  spc->buf = NULL;
+  spc->initialized = TRUE;
+  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 (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_PRIMARY,
+      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);
diff --git a/ext/spc/gstspc.h b/ext/spc/gstspc.h
new file mode 100644
index 00000000..a1627997
--- /dev/null
+++ b/ext/spc/gstspc.h
@@ -0,0 +1,61 @@
+/* Copyright (C) 2004-2005 Michael Pyne <michael dot pyne at kdemail net>
+ * Copyright (C) 2004-2006 Chris Lee <clee at kde org>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+#ifndef __GST_SPC_DEC_H__
+#define __GST_SPC_DEC_H__
+
+#include <gst/gst.h>
+
+#include <openspc.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_SPC_DEC \
+  (gst_spc_dec_get_type())
+#define GST_SPC_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_SPC_DEC,GstSpcDec))
+#define GST_SPC_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_SPC_DEC,GstSpcDecClass))
+#define GST_IS_SPC_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_SPC_DEC))
+#define GST_IS_SPC_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_SPC_DEC))
+
+typedef struct _GstSpcDec GstSpcDec;
+typedef struct _GstSpcDecClass GstSpcDecClass;
+
+struct _GstSpcDec
+{
+  GstElement  element;
+
+  GstPad     *sinkpad;
+  GstPad     *srcpad;
+
+  GstBuffer  *buf;
+  gboolean    initialized;
+};
+
+struct _GstSpcDecClass
+{
+  GstElementClass parent_class;
+};
+
+G_END_DECLS
+
+#endif /* __GST_SPC_DEC_H__ */