Add musepack decoder.

Original commit message from CVS:
* configure.ac:
* ext/Makefile.am:
* ext/musepack/Makefile.am:
* ext/musepack/gstmusepackdec.cpp:
* ext/musepack/gstmusepackdec.h:
* ext/musepack/gstmusepackreader.cpp:
* ext/musepack/gstmusepackreader.h:
Add musepack decoder.
* ext/faad/gstfaad.c: (gst_faad_base_init):
Make pad templates static.
* gst/typefind/gsttypefindfunctions.c: (mp3_type_find),
(plugin_init):
Add musepack typefinder, make mp3 typefinding work halfway stream,
which doesn't actually work yet because id3demux doesn't implement
_get_length().

ChangeLog

@@ -1,3 +1,21 @@
+2004-11-07  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
+
+	* configure.ac:
+	* ext/Makefile.am:
+	* ext/musepack/Makefile.am:
+	* ext/musepack/gstmusepackdec.cpp:
+	* ext/musepack/gstmusepackdec.h:
+	* ext/musepack/gstmusepackreader.cpp:
+	* ext/musepack/gstmusepackreader.h:
+	  Add musepack decoder.
+	* ext/faad/gstfaad.c: (gst_faad_base_init):
+	  Make pad templates static.
+	* gst/typefind/gsttypefindfunctions.c: (mp3_type_find),
+	(plugin_init):
+	  Add musepack typefinder, make mp3 typefinding work halfway stream,
+	  which doesn't actually work yet because id3demux doesn't implement
+	  _get_length().
+
 2004-11-07  Ronald S. Bultje  <rbultje@ronald.bitfreak.net>
 
 	* ext/ogg/gstoggmux.c: (gst_ogg_mux_next_buffer),

configure.ac

@@ -1359,6 +1359,23 @@ main (int   argc,
   fi
 ])
 
+dnl *** musepack ***
+translit(dnm, m, l) AM_CONDITIONAL(USE_MUSEPACK, true)
+GST_CHECK_FEATURE(MUSEPACK, [musepackdec], musepack, [
+  AC_LANG_CPLUSPLUS
+  OLD_CPPFLAGS="$CPPFLAGS"
+  CPPFLAGS="-I/usr/include/musepack $CPPFLAGS"
+  AC_CHECK_HEADER(mpc_dec.h, [
+    HAVE_MUSEPACK="yes"
+    MUSEPACK_LIBS="-lmusepack"
+    MUSEPACK_CFLAGS="-I/usr/include/musepack"
+    AC_SUBST(MUSEPACK_CFLAGS)
+    AC_SUBST(MUSEPACK_LIBS)
+    ], [HAVE_MUSEPACK="no"])
+  CPPFLAGS="$OLD_CPPFLAGS"
+  AC_LANG_C
+])
+
 dnl *** musicbrainz ***
 dnl libmusicbrainz <= 2.0.2 has symbol clashes with ffmpeg
 dnl however, our ffmpeg patch was accepted upstream
@@ -1948,6 +1965,7 @@ ext/mikmod/Makefile
 ext/mpeg2dec/Makefile
 ext/mpeg2enc/Makefile
 ext/mplex/Makefile
+ext/musepack/Makefile
 ext/musicbrainz/Makefile
 ext/nas/Makefile
 ext/ogg/Makefile

ext/Makefile.am

@@ -238,6 +238,12 @@ endif
 #MAS_DIR=
 #endif
 
+if USE_MUSEPACK
+MUSEPACK_DIR=musepack
+else
+MUSEPACK_DIR=
+endif
+
 if USE_MUSICBRAINZ
 MUSICBRAINZ_DIR=musicbrainz
 else
@@ -399,6 +405,7 @@ SUBDIRS=\
 	$(MPEG2DEC_DIR) \
 	$(MPEG2ENC_DIR) \
 	$(MPLEX_DIR) \
+	$(MUSEPACK_DIR) \
 	$(MUSICBRAINZ_DIR) \
 	$(OGG_DIR) \
 	$(PANGO_DIR) \
@@ -458,6 +465,7 @@ DIST_SUBDIRS=\
 	mpeg2dec \
 	mpeg2enc \
 	mplex \
+	musepack \
 	musicbrainz \
 	nas \
 	ogg \

ext/faad/gstfaad.c

@@ -25,14 +25,13 @@
 
 #include "gstfaad.h"
 
-GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
     GST_PAD_SINK,
     GST_PAD_ALWAYS,
-    GST_STATIC_CAPS ("audio/mpeg, "
-        "systemstream = (bool) FALSE, " "mpegversion = { (int) 2, (int) 4 }")
+    GST_STATIC_CAPS ("audio/mpeg, " "mpegversion = (int) { 2, 4 }")
     );
 
-GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
     GST_PAD_SRC,
     GST_PAD_ALWAYS,
     GST_STATIC_CAPS ("audio/x-raw-int, "
@@ -92,12 +91,11 @@ gst_faad_get_type (void)
 static void
 gst_faad_base_init (GstFaadClass * klass)
 {
-  GstElementDetails gst_faad_details = {
-    "Free AAC Decoder (FAAD)",
+  static GstElementDetails gst_faad_details =
+      GST_ELEMENT_DETAILS ("Free AAC Decoder (FAAD)",
       "Codec/Decoder/Audio",
       "Free MPEG-2/4 AAC decoder",
-    "Ronald Bultje <rbultje@ronald.bitfreak.net>",
-  };
+      "Ronald Bultje <rbultje@ronald.bitfreak.net>");
   GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
 
   gst_element_class_add_pad_template (element_class,

ext/musepack/Makefile.am

@@ -0,0 +1,12 @@
+plugin_LTLIBRARIES = libgstmusepack.la
+
+libgstmusepack_la_SOURCES = \
+	gstmusepackdec.cpp \
+	gstmusepackreader.cpp
+libgstmusepack_la_CXXFLAGS = $(MUSEPACK_CFLAGS) $(GST_CFLAGS)
+libgstmusepack_la_LIBADD = $(MUSEPACK_LIBS) 
+libgstmusepack_la_LDFLAGS = $(GST_PLUGIN_LDFLAGS)
+
+noinst_HEADERS = \
+	gstmusepackdec.h \
+	gstmusepackreader.h

ext/musepack/gstmusepackdec.c

@@ -0,0 +1,505 @@
+/* GStreamer Musepack decoder plugin
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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 "gstmusepackdec.h"
+#include "gstmusepackreader.h"
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-musepack")
+    );
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-int, "
+        "endianness = (int) BYTE_ORDER, "
+        "signed = (bool) TRUE, "
+        "width = (int) 32, "
+        "depth = (int) 32, "
+        "rate = (int) [ 8000, 96000 ], "
+        "channels = (int) [ 1, 2 ]")
+    );
+
+static void gst_musepackdec_base_init (GstMusepackDecClass * klass);
+static void gst_musepackdec_class_init (GstMusepackDecClass * klass);
+static void gst_musepackdec_init (GstMusepackDec * musepackdec);
+
+static gboolean gst_musepackdec_src_event (GstPad * pad, GstEvent * event);
+static const GstFormat *gst_musepackdec_get_formats (GstPad * pad);
+static const GstEventMask *gst_musepackdec_get_event_masks (GstPad * pad);
+static const GstQueryType *gst_musepackdec_get_query_types (GstPad * pad);
+static gboolean gst_musepackdec_src_query (GstPad * pad, GstQueryType type,
+    GstFormat * format, gint64 * value);
+static gboolean gst_musepackdec_src_convert (GstPad * pad,
+    GstFormat src_format,
+    gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
+
+static void gst_musepackdec_loop (GstElement * element);
+static GstElementStateReturn
+    gst_musepackdec_change_state (GstElement * element);
+
+static GstElementClass *parent_class = NULL;
+
+/* static guint gst_musepackdec_signals[LAST_SIGNAL] = { 0 }; */
+
+GType
+gst_musepackdec_get_type (void)
+{
+  static GType gst_musepackdec_type = 0;
+
+  if (!gst_musepackdec_type) {
+    static const GTypeInfo gst_musepackdec_info = {
+      sizeof (GstMusepackDecClass),
+      (GBaseInitFunc) gst_musepackdec_base_init,
+      NULL,
+      (GClassInitFunc) gst_musepackdec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstMusepackDec),
+      0,
+      (GInstanceInitFunc) gst_musepackdec_init,
+    };
+
+    gst_musepackdec_type = g_type_register_static (GST_TYPE_ELEMENT,
+        "GstMusepackDec", &gst_musepackdec_info, (GTypeFlags) 0);
+  }
+
+  return gst_musepackdec_type;
+}
+
+static void
+gst_musepackdec_base_init (GstMusepackDecClass * klass)
+{
+  static GstElementDetails gst_musepackdec_details = GST_ELEMENT_DETAILS (
+    "Musepack decoder",
+    "Codec/Decoder/Audio",
+    "Musepack decoder",
+    "Ronald Bultje <rbultje@ronald.bitfreak.net>"
+  );
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_template));
+
+  gst_element_class_set_details (element_class, &gst_musepackdec_details);
+}
+
+static void
+gst_musepackdec_class_init (GstMusepackDecClass * klass)
+{
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+  parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));
+
+  gstelement_class->change_state = gst_musepackdec_change_state;
+}
+
+static void
+gst_musepackdec_init (GstMusepackDec * musepackdec)
+{
+  GST_FLAG_SET (musepackdec, GST_ELEMENT_EVENT_AWARE);
+
+  musepackdec->dec = NULL;
+  musepackdec->seek_pending = FALSE;
+
+  musepackdec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+      "sink");
+  gst_element_add_pad (GST_ELEMENT (musepackdec), musepackdec->sinkpad);
+
+  musepackdec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+      "src");
+  gst_pad_set_event_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_src_event));
+  gst_pad_set_event_mask_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_get_event_masks));
+  gst_pad_set_query_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_src_query));
+  gst_pad_set_query_type_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_get_query_types));
+  gst_pad_set_convert_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_src_convert));
+  gst_pad_set_formats_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_get_formats));
+  gst_pad_use_explicit_caps (musepackdec->srcpad);
+  gst_element_add_pad (GST_ELEMENT (musepackdec), musepackdec->srcpad);
+
+  gst_element_set_loop_function (GST_ELEMENT (musepackdec),
+      gst_musepackdec_loop);
+}
+
+static gboolean
+gst_musepackdec_src_event (GstPad * pad, GstEvent * event)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (gst_pad_get_parent (pad));
+  gboolean res;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_SEEK: {
+      gint64 offset, len, pos;
+      GstFormat fmt = GST_FORMAT_TIME;
+
+      /* in time */
+      if (!gst_pad_convert (pad,
+               (GstFormat) GST_EVENT_SEEK_FORMAT (event),
+               GST_EVENT_SEEK_OFFSET (event),
+               &fmt, &offset) ||
+          !gst_pad_convert (pad,
+               GST_FORMAT_DEFAULT, musepackdec->len,
+               &fmt, &len) ||
+          !gst_pad_convert (pad,
+               GST_FORMAT_DEFAULT, musepackdec->pos,
+               &fmt, &pos)) {
+        res = FALSE;
+        break;
+      }
+
+      /* offset from start */
+      switch (GST_EVENT_SEEK_METHOD (event)) {
+        case GST_SEEK_METHOD_SET:
+          break;
+        case GST_SEEK_METHOD_CUR:
+          offset += pos;
+          break;
+        case GST_SEEK_METHOD_END:
+          offset = len - offset;
+          break;
+        default:
+          res = FALSE;
+          goto done;
+      }
+
+      /* only valid seeks */
+      if (offset >= len || offset < 0) {
+        res = FALSE;
+        break;
+      }
+
+      /* store */
+      musepackdec->seek_pending = TRUE;
+      musepackdec->flush_pending =
+          GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
+      musepackdec->seek_time = offset;
+      res = TRUE;
+      break;
+    }
+    default:
+      res = FALSE;
+      break;
+  }
+
+done:
+  gst_event_unref (event);
+
+  return res;
+}
+
+static const GstFormat *
+gst_musepackdec_get_formats (GstPad * pad)
+{
+  static const GstFormat formats[] = {
+    GST_FORMAT_BYTES,
+    GST_FORMAT_DEFAULT,
+    GST_FORMAT_TIME,
+    (GstFormat) 0
+  };
+
+  return formats;
+}
+
+static const GstEventMask *
+gst_musepackdec_get_event_masks (GstPad * pad)
+{
+  static const GstEventMask event_masks[] = {
+    { GST_EVENT_SEEK,
+          (GstEventFlag) (GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH) },
+    { (GstEventType) 0, (GstEventFlag) 0 }
+  };
+
+  return event_masks;
+}
+
+static const GstQueryType *
+gst_musepackdec_get_query_types (GstPad * pad)
+{
+  static const GstQueryType query_types[] = {
+    GST_QUERY_TOTAL,
+    GST_QUERY_POSITION,
+    (GstQueryType) 0
+  };
+
+  return query_types;
+}
+
+static gboolean
+gst_musepackdec_src_query (GstPad * pad, GstQueryType type,
+    GstFormat * format, gint64 * value)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (gst_pad_get_parent (pad));
+  gboolean res;
+
+  if (!musepackdec->dec)
+    return FALSE;
+
+  switch (type) {
+    case GST_QUERY_TOTAL:
+      res = gst_pad_convert (pad,
+         GST_FORMAT_DEFAULT, musepackdec->len,
+         format, value);
+      break;
+    case GST_QUERY_POSITION:
+      res = gst_pad_convert (pad,
+         GST_FORMAT_DEFAULT, musepackdec->pos,
+         format, value);
+      break;
+    default:
+      res = FALSE;
+      break;
+  }
+
+  return res;
+}
+
+static gboolean
+gst_musepackdec_src_convert (GstPad * pad, GstFormat src_format,
+    gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (gst_pad_get_parent (pad));
+  gboolean res = TRUE;
+
+  if (!musepackdec->dec)
+    return FALSE;
+
+  switch (src_format) {
+    case GST_FORMAT_DEFAULT:
+      switch (*dest_format) {
+        case GST_FORMAT_TIME:
+          *dest_value = src_value * GST_SECOND / musepackdec->rate;
+          break;
+        case GST_FORMAT_BYTES:
+          *dest_value = src_value * musepackdec->bps;
+          break;
+        default:
+          res = FALSE;
+          break;
+      }
+      break;
+
+    case GST_FORMAT_TIME:
+      switch (*dest_format) {
+        case GST_FORMAT_DEFAULT:
+          *dest_value = src_value * musepackdec->rate / GST_SECOND;
+          break;
+        case GST_FORMAT_BYTES:
+          *dest_value = src_value * musepackdec->rate *
+              musepackdec->bps / GST_SECOND;
+          break;
+        default:
+          res = FALSE;
+          break;
+      }
+      break;
+
+    case GST_FORMAT_BYTES:
+      switch (*dest_format) {
+        case GST_FORMAT_DEFAULT:
+          *dest_value = src_value / musepackdec->bps;
+          break;
+        case GST_FORMAT_TIME:
+          *dest_value = src_value * GST_SECOND /
+              (musepackdec->bps * musepackdec->rate);
+          break;
+        default:
+          res = FALSE;
+          break;
+      }
+      break;
+
+    default:
+      res = FALSE;
+      break;
+  }
+
+  return TRUE;
+}
+
+static gboolean
+gst_musepack_stream_init (GstMusepackDec * musepackdec)
+{
+  StreamInfo si = StreamInfo ();
+
+  if (musepackdec->dec)
+    delete musepackdec->dec;
+
+  musepackdec->reader = new GstMusepackReader (musepackdec->bs);
+  if (si.ReadStreamInfo (musepackdec->reader) != ERROR_CODE_OK) {
+    GST_ELEMENT_ERROR (musepackdec, STREAM, WRONG_TYPE, (NULL), (NULL));
+    delete musepackdec->reader;
+    return FALSE;
+  }
+
+  musepackdec->dec = new MPC_decoder (musepackdec->reader);
+  if (!musepackdec->dec) {
+    GST_ELEMENT_ERROR (musepackdec, LIBRARY, INIT, (NULL),
+        ("Creating decoder object failed"));
+    delete musepackdec->reader;
+    return FALSE;
+  }
+
+  if (!musepackdec->dec->Initialize (&si)) {
+    GST_ELEMENT_ERROR (musepackdec, LIBRARY, INIT, (NULL),
+        ("Initializating stream failed"));
+    delete musepackdec->dec;
+    musepackdec->dec = NULL;
+    return FALSE;
+  }
+
+  if (!gst_pad_set_explicit_caps (musepackdec->srcpad,
+           gst_caps_new_simple ("audio/x-raw-int",
+               "width", G_TYPE_INT, 32,
+               "depth", G_TYPE_INT, 32,
+               "endianness", G_TYPE_INT, G_BYTE_ORDER,
+               "channels", G_TYPE_INT, si.simple.Channels,
+               "rate", G_TYPE_INT, si.simple.SampleFreq,
+               "signed", G_TYPE_BOOLEAN, TRUE,
+               NULL))) {
+    GST_ELEMENT_ERROR (musepackdec, CORE, NEGOTIATION, (NULL), (NULL));
+    delete musepackdec->dec;
+    musepackdec->dec = NULL;
+    return FALSE;
+  }
+
+  musepackdec->bps = 4 * si.simple.Channels;
+  musepackdec->rate = si.simple.SampleFreq;
+  musepackdec->pos = 0;
+  musepackdec->len = si.simple.PCMSamples;
+
+  return TRUE;
+}
+
+static void
+gst_musepackdec_loop (GstElement * element)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (element);
+  GstBuffer *out;
+  GstFormat fmt;
+
+  if (!musepackdec->dec) {
+    if (!gst_musepack_stream_init (musepackdec))
+      return;
+  }
+
+  if (musepackdec->seek_pending) {
+    gdouble seek_time = (gdouble) musepackdec->seek_time / GST_SECOND;
+
+    musepackdec->seek_pending = FALSE;
+    if (musepackdec->dec->SeekSeconds (seek_time)) {
+      if (musepackdec->flush_pending) {
+        musepackdec->flush_pending = FALSE;
+        gst_pad_push (musepackdec->srcpad,
+            GST_DATA (gst_event_new (GST_EVENT_FLUSH)));
+      }
+      gst_pad_push (musepackdec->srcpad,
+          GST_DATA (gst_event_new_discontinuous (FALSE,
+                        GST_FORMAT_TIME, musepackdec->seek_time,
+                        GST_FORMAT_UNDEFINED)));
+      fmt = GST_FORMAT_DEFAULT;
+      gst_pad_convert (musepackdec->srcpad,
+          GST_FORMAT_TIME, musepackdec->seek_time,
+          &fmt, (gint64 *) &musepackdec->pos);
+    }
+  }
+
+  out = gst_buffer_new_and_alloc (MPC_decoder::DecodeBufferLength * 4);
+  GST_BUFFER_SIZE (out) =
+      musepackdec->dec->Decode ((MPC_SAMPLE_FORMAT *) GST_BUFFER_DATA (out));
+  if (GST_BUFFER_SIZE (out) == 0) {
+    if (musepackdec->reader->eos == true) {
+      gst_element_set_eos (element);
+      gst_pad_push (musepackdec->srcpad,
+          GST_DATA (gst_event_new (GST_EVENT_EOS)));
+    }
+    gst_buffer_unref (out);
+    return;
+  }
+  /* note that the size is still in samples */
+  fmt = GST_FORMAT_TIME;
+  gst_pad_query (musepackdec->srcpad,
+      GST_QUERY_POSITION, &fmt, (gint64 *) &GST_BUFFER_TIMESTAMP (out));
+  gst_pad_convert (musepackdec->srcpad,
+      GST_FORMAT_DEFAULT, GST_BUFFER_SIZE (out),
+      &fmt, (gint64 *) &GST_BUFFER_DURATION (out));
+  musepackdec->pos += GST_BUFFER_SIZE (out);
+  /* convert to bytes */
+  GST_BUFFER_SIZE (out) *= musepackdec->bps;
+  gst_pad_push (musepackdec->srcpad, GST_DATA (out));
+}
+
+static GstElementStateReturn
+gst_musepackdec_change_state (GstElement * element)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (element);
+
+  switch (GST_STATE_TRANSITION (element)) {
+    case GST_STATE_NULL_TO_READY:
+      musepackdec->bs = gst_bytestream_new (musepackdec->sinkpad);
+      break;
+    case GST_STATE_PAUSED_TO_READY:
+      musepackdec->seek_pending = FALSE;
+      if (musepackdec->dec != NULL) {
+        delete musepackdec->reader;
+        delete musepackdec->dec;
+        musepackdec->dec = NULL;
+      }
+      break;
+    case GST_STATE_READY_TO_NULL:
+      gst_bytestream_destroy (musepackdec->bs);
+      break;
+    default:
+      break;
+  }
+
+  if (GST_ELEMENT_CLASS (parent_class)->change_state)
+    return GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+  return GST_STATE_SUCCESS;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  return gst_library_load ("gstbytestream") &&
+      gst_element_register (plugin, "musepackdec",
+          GST_RANK_PRIMARY, GST_TYPE_MUSEPACK_DEC);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "musepack",
+    "Musepack decoder",
+    plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)

ext/musepack/gstmusepackdec.cpp

@@ -0,0 +1,505 @@
+/* GStreamer Musepack decoder plugin
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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 "gstmusepackdec.h"
+#include "gstmusepackreader.h"
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-musepack")
+    );
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("audio/x-raw-int, "
+        "endianness = (int) BYTE_ORDER, "
+        "signed = (bool) TRUE, "
+        "width = (int) 32, "
+        "depth = (int) 32, "
+        "rate = (int) [ 8000, 96000 ], "
+        "channels = (int) [ 1, 2 ]")
+    );
+
+static void gst_musepackdec_base_init (GstMusepackDecClass * klass);
+static void gst_musepackdec_class_init (GstMusepackDecClass * klass);
+static void gst_musepackdec_init (GstMusepackDec * musepackdec);
+
+static gboolean gst_musepackdec_src_event (GstPad * pad, GstEvent * event);
+static const GstFormat *gst_musepackdec_get_formats (GstPad * pad);
+static const GstEventMask *gst_musepackdec_get_event_masks (GstPad * pad);
+static const GstQueryType *gst_musepackdec_get_query_types (GstPad * pad);
+static gboolean gst_musepackdec_src_query (GstPad * pad, GstQueryType type,
+    GstFormat * format, gint64 * value);
+static gboolean gst_musepackdec_src_convert (GstPad * pad,
+    GstFormat src_format,
+    gint64 src_value, GstFormat * dest_format, gint64 * dest_value);
+
+static void gst_musepackdec_loop (GstElement * element);
+static GstElementStateReturn
+    gst_musepackdec_change_state (GstElement * element);
+
+static GstElementClass *parent_class = NULL;
+
+/* static guint gst_musepackdec_signals[LAST_SIGNAL] = { 0 }; */
+
+GType
+gst_musepackdec_get_type (void)
+{
+  static GType gst_musepackdec_type = 0;
+
+  if (!gst_musepackdec_type) {
+    static const GTypeInfo gst_musepackdec_info = {
+      sizeof (GstMusepackDecClass),
+      (GBaseInitFunc) gst_musepackdec_base_init,
+      NULL,
+      (GClassInitFunc) gst_musepackdec_class_init,
+      NULL,
+      NULL,
+      sizeof (GstMusepackDec),
+      0,
+      (GInstanceInitFunc) gst_musepackdec_init,
+    };
+
+    gst_musepackdec_type = g_type_register_static (GST_TYPE_ELEMENT,
+        "GstMusepackDec", &gst_musepackdec_info, (GTypeFlags) 0);
+  }
+
+  return gst_musepackdec_type;
+}
+
+static void
+gst_musepackdec_base_init (GstMusepackDecClass * klass)
+{
+  static GstElementDetails gst_musepackdec_details = GST_ELEMENT_DETAILS (
+    "Musepack decoder",
+    "Codec/Decoder/Audio",
+    "Musepack decoder",
+    "Ronald Bultje <rbultje@ronald.bitfreak.net>"
+  );
+  GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
+
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&src_template));
+  gst_element_class_add_pad_template (element_class,
+      gst_static_pad_template_get (&sink_template));
+
+  gst_element_class_set_details (element_class, &gst_musepackdec_details);
+}
+
+static void
+gst_musepackdec_class_init (GstMusepackDecClass * klass)
+{
+  GstElementClass *gstelement_class = GST_ELEMENT_CLASS (klass);
+
+  parent_class = GST_ELEMENT_CLASS (g_type_class_ref (GST_TYPE_ELEMENT));
+
+  gstelement_class->change_state = gst_musepackdec_change_state;
+}
+
+static void
+gst_musepackdec_init (GstMusepackDec * musepackdec)
+{
+  GST_FLAG_SET (musepackdec, GST_ELEMENT_EVENT_AWARE);
+
+  musepackdec->dec = NULL;
+  musepackdec->seek_pending = FALSE;
+
+  musepackdec->sinkpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&sink_template),
+      "sink");
+  gst_element_add_pad (GST_ELEMENT (musepackdec), musepackdec->sinkpad);
+
+  musepackdec->srcpad =
+      gst_pad_new_from_template (gst_static_pad_template_get (&src_template),
+      "src");
+  gst_pad_set_event_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_src_event));
+  gst_pad_set_event_mask_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_get_event_masks));
+  gst_pad_set_query_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_src_query));
+  gst_pad_set_query_type_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_get_query_types));
+  gst_pad_set_convert_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_src_convert));
+  gst_pad_set_formats_function (musepackdec->srcpad,
+      GST_DEBUG_FUNCPTR (gst_musepackdec_get_formats));
+  gst_pad_use_explicit_caps (musepackdec->srcpad);
+  gst_element_add_pad (GST_ELEMENT (musepackdec), musepackdec->srcpad);
+
+  gst_element_set_loop_function (GST_ELEMENT (musepackdec),
+      gst_musepackdec_loop);
+}
+
+static gboolean
+gst_musepackdec_src_event (GstPad * pad, GstEvent * event)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (gst_pad_get_parent (pad));
+  gboolean res;
+
+  switch (GST_EVENT_TYPE (event)) {
+    case GST_EVENT_SEEK: {
+      gint64 offset, len, pos;
+      GstFormat fmt = GST_FORMAT_TIME;
+
+      /* in time */
+      if (!gst_pad_convert (pad,
+               (GstFormat) GST_EVENT_SEEK_FORMAT (event),
+               GST_EVENT_SEEK_OFFSET (event),
+               &fmt, &offset) ||
+          !gst_pad_convert (pad,
+               GST_FORMAT_DEFAULT, musepackdec->len,
+               &fmt, &len) ||
+          !gst_pad_convert (pad,
+               GST_FORMAT_DEFAULT, musepackdec->pos,
+               &fmt, &pos)) {
+        res = FALSE;
+        break;
+      }
+
+      /* offset from start */
+      switch (GST_EVENT_SEEK_METHOD (event)) {
+        case GST_SEEK_METHOD_SET:
+          break;
+        case GST_SEEK_METHOD_CUR:
+          offset += pos;
+          break;
+        case GST_SEEK_METHOD_END:
+          offset = len - offset;
+          break;
+        default:
+          res = FALSE;
+          goto done;
+      }
+
+      /* only valid seeks */
+      if (offset >= len || offset < 0) {
+        res = FALSE;
+        break;
+      }
+
+      /* store */
+      musepackdec->seek_pending = TRUE;
+      musepackdec->flush_pending =
+          GST_EVENT_SEEK_FLAGS (event) & GST_SEEK_FLAG_FLUSH;
+      musepackdec->seek_time = offset;
+      res = TRUE;
+      break;
+    }
+    default:
+      res = FALSE;
+      break;
+  }
+
+done:
+  gst_event_unref (event);
+
+  return res;
+}
+
+static const GstFormat *
+gst_musepackdec_get_formats (GstPad * pad)
+{
+  static const GstFormat formats[] = {
+    GST_FORMAT_BYTES,
+    GST_FORMAT_DEFAULT,
+    GST_FORMAT_TIME,
+    (GstFormat) 0
+  };
+
+  return formats;
+}
+
+static const GstEventMask *
+gst_musepackdec_get_event_masks (GstPad * pad)
+{
+  static const GstEventMask event_masks[] = {
+    { GST_EVENT_SEEK,
+          (GstEventFlag) (GST_SEEK_METHOD_SET | GST_SEEK_FLAG_FLUSH) },
+    { (GstEventType) 0, (GstEventFlag) 0 }
+  };
+
+  return event_masks;
+}
+
+static const GstQueryType *
+gst_musepackdec_get_query_types (GstPad * pad)
+{
+  static const GstQueryType query_types[] = {
+    GST_QUERY_TOTAL,
+    GST_QUERY_POSITION,
+    (GstQueryType) 0
+  };
+
+  return query_types;
+}
+
+static gboolean
+gst_musepackdec_src_query (GstPad * pad, GstQueryType type,
+    GstFormat * format, gint64 * value)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (gst_pad_get_parent (pad));
+  gboolean res;
+
+  if (!musepackdec->dec)
+    return FALSE;
+
+  switch (type) {
+    case GST_QUERY_TOTAL:
+      res = gst_pad_convert (pad,
+         GST_FORMAT_DEFAULT, musepackdec->len,
+         format, value);
+      break;
+    case GST_QUERY_POSITION:
+      res = gst_pad_convert (pad,
+         GST_FORMAT_DEFAULT, musepackdec->pos,
+         format, value);
+      break;
+    default:
+      res = FALSE;
+      break;
+  }
+
+  return res;
+}
+
+static gboolean
+gst_musepackdec_src_convert (GstPad * pad, GstFormat src_format,
+    gint64 src_value, GstFormat * dest_format, gint64 * dest_value)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (gst_pad_get_parent (pad));
+  gboolean res = TRUE;
+
+  if (!musepackdec->dec)
+    return FALSE;
+
+  switch (src_format) {
+    case GST_FORMAT_DEFAULT:
+      switch (*dest_format) {
+        case GST_FORMAT_TIME:
+          *dest_value = src_value * GST_SECOND / musepackdec->rate;
+          break;
+        case GST_FORMAT_BYTES:
+          *dest_value = src_value * musepackdec->bps;
+          break;
+        default:
+          res = FALSE;
+          break;
+      }
+      break;
+
+    case GST_FORMAT_TIME:
+      switch (*dest_format) {
+        case GST_FORMAT_DEFAULT:
+          *dest_value = src_value * musepackdec->rate / GST_SECOND;
+          break;
+        case GST_FORMAT_BYTES:
+          *dest_value = src_value * musepackdec->rate *
+              musepackdec->bps / GST_SECOND;
+          break;
+        default:
+          res = FALSE;
+          break;
+      }
+      break;
+
+    case GST_FORMAT_BYTES:
+      switch (*dest_format) {
+        case GST_FORMAT_DEFAULT:
+          *dest_value = src_value / musepackdec->bps;
+          break;
+        case GST_FORMAT_TIME:
+          *dest_value = src_value * GST_SECOND /
+              (musepackdec->bps * musepackdec->rate);
+          break;
+        default:
+          res = FALSE;
+          break;
+      }
+      break;
+
+    default:
+      res = FALSE;
+      break;
+  }
+
+  return TRUE;
+}
+
+static gboolean
+gst_musepack_stream_init (GstMusepackDec * musepackdec)
+{
+  StreamInfo si = StreamInfo ();
+
+  if (musepackdec->dec)
+    delete musepackdec->dec;
+
+  musepackdec->reader = new GstMusepackReader (musepackdec->bs);
+  if (si.ReadStreamInfo (musepackdec->reader) != ERROR_CODE_OK) {
+    GST_ELEMENT_ERROR (musepackdec, STREAM, WRONG_TYPE, (NULL), (NULL));
+    delete musepackdec->reader;
+    return FALSE;
+  }
+
+  musepackdec->dec = new MPC_decoder (musepackdec->reader);
+  if (!musepackdec->dec) {
+    GST_ELEMENT_ERROR (musepackdec, LIBRARY, INIT, (NULL),
+        ("Creating decoder object failed"));
+    delete musepackdec->reader;
+    return FALSE;
+  }
+
+  if (!musepackdec->dec->Initialize (&si)) {
+    GST_ELEMENT_ERROR (musepackdec, LIBRARY, INIT, (NULL),
+        ("Initializating stream failed"));
+    delete musepackdec->dec;
+    musepackdec->dec = NULL;
+    return FALSE;
+  }
+
+  if (!gst_pad_set_explicit_caps (musepackdec->srcpad,
+           gst_caps_new_simple ("audio/x-raw-int",
+               "width", G_TYPE_INT, 32,
+               "depth", G_TYPE_INT, 32,
+               "endianness", G_TYPE_INT, G_BYTE_ORDER,
+               "channels", G_TYPE_INT, si.simple.Channels,
+               "rate", G_TYPE_INT, si.simple.SampleFreq,
+               "signed", G_TYPE_BOOLEAN, TRUE,
+               NULL))) {
+    GST_ELEMENT_ERROR (musepackdec, CORE, NEGOTIATION, (NULL), (NULL));
+    delete musepackdec->dec;
+    musepackdec->dec = NULL;
+    return FALSE;
+  }
+
+  musepackdec->bps = 4 * si.simple.Channels;
+  musepackdec->rate = si.simple.SampleFreq;
+  musepackdec->pos = 0;
+  musepackdec->len = si.simple.PCMSamples;
+
+  return TRUE;
+}
+
+static void
+gst_musepackdec_loop (GstElement * element)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (element);
+  GstBuffer *out;
+  GstFormat fmt;
+
+  if (!musepackdec->dec) {
+    if (!gst_musepack_stream_init (musepackdec))
+      return;
+  }
+
+  if (musepackdec->seek_pending) {
+    gdouble seek_time = (gdouble) musepackdec->seek_time / GST_SECOND;
+
+    musepackdec->seek_pending = FALSE;
+    if (musepackdec->dec->SeekSeconds (seek_time)) {
+      if (musepackdec->flush_pending) {
+        musepackdec->flush_pending = FALSE;
+        gst_pad_push (musepackdec->srcpad,
+            GST_DATA (gst_event_new (GST_EVENT_FLUSH)));
+      }
+      gst_pad_push (musepackdec->srcpad,
+          GST_DATA (gst_event_new_discontinuous (FALSE,
+                        GST_FORMAT_TIME, musepackdec->seek_time,
+                        GST_FORMAT_UNDEFINED)));
+      fmt = GST_FORMAT_DEFAULT;
+      gst_pad_convert (musepackdec->srcpad,
+          GST_FORMAT_TIME, musepackdec->seek_time,
+          &fmt, (gint64 *) &musepackdec->pos);
+    }
+  }
+
+  out = gst_buffer_new_and_alloc (MPC_decoder::DecodeBufferLength * 4);
+  GST_BUFFER_SIZE (out) =
+      musepackdec->dec->Decode ((MPC_SAMPLE_FORMAT *) GST_BUFFER_DATA (out));
+  if (GST_BUFFER_SIZE (out) == 0) {
+    if (musepackdec->reader->eos == true) {
+      gst_element_set_eos (element);
+      gst_pad_push (musepackdec->srcpad,
+          GST_DATA (gst_event_new (GST_EVENT_EOS)));
+    }
+    gst_buffer_unref (out);
+    return;
+  }
+  /* note that the size is still in samples */
+  fmt = GST_FORMAT_TIME;
+  gst_pad_query (musepackdec->srcpad,
+      GST_QUERY_POSITION, &fmt, (gint64 *) &GST_BUFFER_TIMESTAMP (out));
+  gst_pad_convert (musepackdec->srcpad,
+      GST_FORMAT_DEFAULT, GST_BUFFER_SIZE (out),
+      &fmt, (gint64 *) &GST_BUFFER_DURATION (out));
+  musepackdec->pos += GST_BUFFER_SIZE (out);
+  /* convert to bytes */
+  GST_BUFFER_SIZE (out) *= musepackdec->bps;
+  gst_pad_push (musepackdec->srcpad, GST_DATA (out));
+}
+
+static GstElementStateReturn
+gst_musepackdec_change_state (GstElement * element)
+{
+  GstMusepackDec *musepackdec = GST_MUSEPACK_DEC (element);
+
+  switch (GST_STATE_TRANSITION (element)) {
+    case GST_STATE_NULL_TO_READY:
+      musepackdec->bs = gst_bytestream_new (musepackdec->sinkpad);
+      break;
+    case GST_STATE_PAUSED_TO_READY:
+      musepackdec->seek_pending = FALSE;
+      if (musepackdec->dec != NULL) {
+        delete musepackdec->reader;
+        delete musepackdec->dec;
+        musepackdec->dec = NULL;
+      }
+      break;
+    case GST_STATE_READY_TO_NULL:
+      gst_bytestream_destroy (musepackdec->bs);
+      break;
+    default:
+      break;
+  }
+
+  if (GST_ELEMENT_CLASS (parent_class)->change_state)
+    return GST_ELEMENT_CLASS (parent_class)->change_state (element);
+
+  return GST_STATE_SUCCESS;
+}
+
+static gboolean
+plugin_init (GstPlugin * plugin)
+{
+  return gst_library_load ("gstbytestream") &&
+      gst_element_register (plugin, "musepackdec",
+          GST_RANK_PRIMARY, GST_TYPE_MUSEPACK_DEC);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    "musepack",
+    "Musepack decoder",
+    plugin_init, VERSION, "LGPL", GST_PACKAGE, GST_ORIGIN)

ext/musepack/gstmusepackdec.h

@@ -0,0 +1,73 @@
+/* GStreamer Musepack decoder plugin
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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_MUSEPACK_DEC_H__
+#define __GST_MUSEPACK_DEC_H__
+
+#include <gst/gst.h>
+#include <gst/bytestream/bytestream.h>
+#include <mpc_dec.h>
+#include "gstmusepackreader.h"
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_MUSEPACK_DEC \
+  (gst_musepackdec_get_type ())
+#define GST_MUSEPACK_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_MUSEPACK_DEC, \
+                               GstMusepackDec))
+#define GST_MUSEPACK_DEC_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_MUSEPACK_DEC, \
+                            GstMusepackDecClass))
+#define GST_IS_MUSEPACK_DEC(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_MUSEPACK_DEC))
+#define GST_IS_MUSEPACK_DEC_CLASS(obj) \
+  (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_MUSEPACK_DEC))
+
+typedef struct _GstMusepackDec {
+  GstElement element;
+
+  /* pads */
+  GstPad *srcpad, *sinkpad;
+  GstByteStream *bs;
+
+  /* MUSEPACK_DEC object */
+  MPC_decoder *dec;
+  GstMusepackReader *reader;
+
+  /* bytes-per-sample */
+  int bps, rate;
+
+  /* position and length, in samples */
+  guint64 pos, len;
+
+  /* seeks */
+  gdouble flush_pending, seek_pending;
+  guint64 seek_time;
+} GstMusepackDec;
+
+typedef struct _GstMusepackDecClass {
+  GstElementClass parent_class;
+} GstMusepackDecClass;
+
+GType gst_musepackdec_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_MUSEPACK_DEC_H__ */

ext/musepack/gstmusepackreader.c

@@ -0,0 +1,145 @@
+/* GStreamer Musepack decoder plugin
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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 <gst/gst.h>
+#include <string.h>
+
+#include "gstmusepackreader.h"
+
+GstMusepackReader::GstMusepackReader (GstByteStream *bs)
+{
+  this->bs = bs;
+  this->eos = false;
+}
+
+GstMusepackReader::~GstMusepackReader (void)
+{
+}
+
+mpc_int32_t
+GstMusepackReader::read (void * ptr, mpc_int32_t size)
+{
+  guint8 *data;
+  gint read;
+
+  do {
+    read = gst_bytestream_peek_bytes (this->bs, &data, size);
+
+    if (read != size) {
+      GstEvent *event;
+      guint32 remaining;
+
+      gst_bytestream_get_status (this->bs, &remaining, &event);
+      if (!event) {
+        GST_ELEMENT_ERROR (gst_pad_get_parent (this->bs->pad),
+            RESOURCE, READ, (NULL), (NULL));
+        goto done;
+      }
+
+      switch (GST_EVENT_TYPE (event)) {
+        case GST_EVENT_INTERRUPT:
+          gst_event_unref (event);
+          goto done;
+        case GST_EVENT_EOS:
+          this->eos = true;
+          gst_event_unref (event);
+          goto done;
+        default:
+          gst_pad_event_default (this->bs->pad, event);
+          break;
+      }
+    }
+  } while (read != size);
+
+done:
+  if (read != 0) {
+    memcpy (ptr, data, read);
+    gst_bytestream_flush_fast (this->bs, read);
+  }
+
+  return read;
+}
+
+bool
+GstMusepackReader::seek (mpc_int32_t offset)
+{
+  guint8 *dummy;
+
+  /* hacky hack - if we're after typefind, we'll fail because
+   * typefind is still typefinding (heh :) ). So read first. */
+  if (this->tell () == 0) {
+    guint8 dummy2[1];
+    this->read (dummy2, 1);
+  }
+
+  if (!gst_bytestream_seek (this->bs, offset, GST_SEEK_METHOD_SET))
+    return FALSE;
+
+  /* get discont */
+  while (gst_bytestream_peek_bytes (this->bs, &dummy, 1) != 1) {
+    GstEvent *event;
+    guint32 remaining;
+
+    gst_bytestream_get_status (this->bs, &remaining, &event);
+    if (!event) {
+      GST_ELEMENT_ERROR (gst_pad_get_parent (this->bs->pad),
+          RESOURCE, SEEK, (NULL), (NULL));
+      return false;
+    }
+    switch (GST_EVENT_TYPE (event)) {
+      case GST_EVENT_EOS:
+        g_warning ("EOS!");
+        gst_event_unref (event);
+        return false;
+      case GST_EVENT_DISCONTINUOUS:
+        gst_event_unref (event);
+        return true;
+      case GST_EVENT_INTERRUPT:
+        g_warning ("interrupt!");
+        return false;
+      default:
+        gst_pad_event_default (this->bs->pad, event);
+        break;
+    }
+  }
+
+  return false;
+}
+
+mpc_int32_t
+GstMusepackReader::tell (void)
+{
+  return gst_bytestream_tell (this->bs);
+}
+
+mpc_int32_t
+GstMusepackReader::get_size (void)
+{
+  return gst_bytestream_length (this->bs);
+}
+
+bool
+GstMusepackReader::canseek (void)
+{
+  return true;
+}

ext/musepack/gstmusepackreader.cpp

@@ -0,0 +1,145 @@
+/* GStreamer Musepack decoder plugin
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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 <gst/gst.h>
+#include <string.h>
+
+#include "gstmusepackreader.h"
+
+GstMusepackReader::GstMusepackReader (GstByteStream *bs)
+{
+  this->bs = bs;
+  this->eos = false;
+}
+
+GstMusepackReader::~GstMusepackReader (void)
+{
+}
+
+mpc_int32_t
+GstMusepackReader::read (void * ptr, mpc_int32_t size)
+{
+  guint8 *data;
+  gint read;
+
+  do {
+    read = gst_bytestream_peek_bytes (this->bs, &data, size);
+
+    if (read != size) {
+      GstEvent *event;
+      guint32 remaining;
+
+      gst_bytestream_get_status (this->bs, &remaining, &event);
+      if (!event) {
+        GST_ELEMENT_ERROR (gst_pad_get_parent (this->bs->pad),
+            RESOURCE, READ, (NULL), (NULL));
+        goto done;
+      }
+
+      switch (GST_EVENT_TYPE (event)) {
+        case GST_EVENT_INTERRUPT:
+          gst_event_unref (event);
+          goto done;
+        case GST_EVENT_EOS:
+          this->eos = true;
+          gst_event_unref (event);
+          goto done;
+        default:
+          gst_pad_event_default (this->bs->pad, event);
+          break;
+      }
+    }
+  } while (read != size);
+
+done:
+  if (read != 0) {
+    memcpy (ptr, data, read);
+    gst_bytestream_flush_fast (this->bs, read);
+  }
+
+  return read;
+}
+
+bool
+GstMusepackReader::seek (mpc_int32_t offset)
+{
+  guint8 *dummy;
+
+  /* hacky hack - if we're after typefind, we'll fail because
+   * typefind is still typefinding (heh :) ). So read first. */
+  if (this->tell () == 0) {
+    guint8 dummy2[1];
+    this->read (dummy2, 1);
+  }
+
+  if (!gst_bytestream_seek (this->bs, offset, GST_SEEK_METHOD_SET))
+    return FALSE;
+
+  /* get discont */
+  while (gst_bytestream_peek_bytes (this->bs, &dummy, 1) != 1) {
+    GstEvent *event;
+    guint32 remaining;
+
+    gst_bytestream_get_status (this->bs, &remaining, &event);
+    if (!event) {
+      GST_ELEMENT_ERROR (gst_pad_get_parent (this->bs->pad),
+          RESOURCE, SEEK, (NULL), (NULL));
+      return false;
+    }
+    switch (GST_EVENT_TYPE (event)) {
+      case GST_EVENT_EOS:
+        g_warning ("EOS!");
+        gst_event_unref (event);
+        return false;
+      case GST_EVENT_DISCONTINUOUS:
+        gst_event_unref (event);
+        return true;
+      case GST_EVENT_INTERRUPT:
+        g_warning ("interrupt!");
+        return false;
+      default:
+        gst_pad_event_default (this->bs->pad, event);
+        break;
+    }
+  }
+
+  return false;
+}
+
+mpc_int32_t
+GstMusepackReader::tell (void)
+{
+  return gst_bytestream_tell (this->bs);
+}
+
+mpc_int32_t
+GstMusepackReader::get_size (void)
+{
+  return gst_bytestream_length (this->bs);
+}
+
+bool
+GstMusepackReader::canseek (void)
+{
+  return true;
+}

ext/musepack/gstmusepackreader.h

@@ -0,0 +1,43 @@
+/* GStreamer Musepack decoder plugin
+ * Copyright (C) 2004 Ronald Bultje <rbultje@ronald.bitfreak.net>
+ *
+ * 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_MUSEPACK_READER_H__
+#define __GST_MUSEPACK_READER_H__
+
+#include <mpc_dec.h>
+#include <gst/bytestream/bytestream.h>
+
+class GstMusepackReader : public MPC_reader {
+public:
+  GstMusepackReader (GstByteStream *bs);
+  virtual ~GstMusepackReader (void);
+
+  mpc_int32_t read (void * ptr, mpc_int32_t size);
+  bool seek (mpc_int32_t offset);
+  mpc_int32_t tell (void);
+  mpc_int32_t get_size (void);
+  bool canseek (void);
+
+  bool eos;
+
+private:
+  GstByteStream *bs;
+};
+
+#endif /* __GST_MUSEPACK_READER_H__ */