commit 33c16e297af5aad1bd7ee22741c4c2fc347eee5c
parent 072eeeccc8bc85170b90b36ec9a4fce9cb328f00
Author: Christian Grothoff <christian@grothoff.org>
Date: Wed, 22 Aug 2012 19:18:55 +0000
adding support for MIDI
Diffstat:
5 files changed, 320 insertions(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
@@ -22,6 +22,7 @@ AM_INIT_AUTOMAKE([silent-rules])
AC_USE_SYSTEM_EXTENSIONS
AC_PROG_AWK
AC_PROG_CC
+AM_PROG_CC_C_O
AC_PROG_CPP
AC_PROG_CXX
AC_CHECK_PROG(HAVE_CXX, $CXX, yes, no)
@@ -423,7 +424,18 @@ else
AM_CONDITIONAL(HAVE_GLIB,false)
AC_DEFINE(HAVE_GLIB, 0, [Have glib])
fi
-
+
+# smf requires glib.h
+CFLAGS_OLD=$CFLAGS
+export CFLAGS="$CFLAGS $GLIB_CFLAGS"
+
+AC_CHECK_LIB(smf, smf_load_from_memory,
+ [AC_CHECK_HEADERS([smf.h],
+ AM_CONDITIONAL(HAVE_SMF, true)
+ AC_DEFINE(HAVE_MPEG2,1,[Have libsmf]),
+ AM_CONDITIONAL(HAVE_SMF, false))],
+ AM_CONDITIONAL(HAVE_SMF, false))
+export CFLAGS=$CFLAGS_OLD
# check for gtk >= 2.6.0
AC_MSG_CHECKING(for gtk)
@@ -645,6 +657,11 @@ then
AC_MSG_NOTICE([NOTICE: libflac not found, flac support disabled])
fi
+if test "x$HAVE_SMF_TRUE" = "x#"
+then
+ AC_MSG_NOTICE([NOTICE: libsmf not found, midi support disabled])
+fi
+
if test "x$HAVE_MPEG2_TRUE" = "x#"
then
AC_MSG_NOTICE([NOTICE: libmpeg2 not found, mpeg2 support disabled])
diff --git a/src/plugins/Makefile.am b/src/plugins/Makefile.am
@@ -25,6 +25,7 @@ EXTRA_DIST = \
testdata/it_dawn.it \
testdata/jpeg_image.jpg \
testdata/man_extract.1 \
+ testdata/midi_dth.mid \
testdata/mpeg_alien.mpg \
testdata/mpeg_melt.mpg \
testdata/nsf_arkanoid.nsf \
@@ -118,6 +119,11 @@ PLUGIN_RPM=libextractor_rpm.la
TEST_RPM=test_rpm
endif
+if HAVE_SMF
+PLUGIN_MIDI=libextractor_midi.la
+TEST_MIDI=test_midi
+endif
+
if HAVE_TIFF
PLUGIN_TIFF=libextractor_tiff.la
TEST_TIFF=test_tiff
@@ -159,6 +165,7 @@ plugin_LTLIBRARIES = \
$(PLUGIN_GTK) \
$(PLUGIN_HTML) \
$(PLUGIN_JPEG) \
+ $(PLUGIN_MIDI) \
$(PLUGIN_MIME) \
$(PLUGIN_MPEG) \
$(PLUGIN_OGG) \
@@ -195,6 +202,7 @@ check_PROGRAMS = \
$(TEST_GTK) \
$(TEST_HTML) \
$(TEST_JPEG) \
+ $(TEST_MIDI) \
$(TEST_MIME) \
$(TEST_MPEG) \
$(TEST_OGG) \
@@ -343,6 +351,21 @@ test_man_LDADD = \
$(top_builddir)/src/plugins/libtest.la
+libextractor_midi_la_SOURCES = \
+ midi_extractor.c
+libextractor_midi_la_CFLAGS = \
+ $(GLIB_CFLAGS)
+libextractor_midi_la_LDFLAGS = \
+ $(PLUGINFLAGS)
+libextractor_midi_la_LIBADD = \
+ -lsmf
+
+test_midi_SOURCES = \
+ test_midi.c
+test_midi_LDADD = \
+ $(top_builddir)/src/plugins/libtest.la
+
+
libextractor_mime_la_SOURCES = \
mime_extractor.c
libextractor_mime_la_LDFLAGS = \
diff --git a/src/plugins/midi_extractor.c b/src/plugins/midi_extractor.c
@@ -0,0 +1,187 @@
+/*
+ This file is part of libextractor.
+ (C) 2012 Christian Grothoff
+
+ libextractor is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ libextractor 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with libextractor; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+ */
+/**
+ * @file plugins/midi_extractor.c
+ * @brief plugin to support MIDI files
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "extractor.h"
+#include <smf.h>
+
+
+/**
+ * Types of events in MIDI.
+ */
+enum EventType
+ {
+ ET_SEQUENCE_NUMBER = 0,
+ ET_TEXT_EVENT = 1,
+ ET_COPYRIGHT_NOTICE = 2,
+ ET_TRACK_NAME = 3,
+ ET_INSTRUMENT_NAME = 4,
+ ET_LYRIC_TEXT = 5,
+ ET_MARKER_TEXT = 6,
+ ET_CUE_POINT = 7,
+ ET_CHANNEL_PREFIX_ASSIGNMENT = 0x20,
+ ET_END_OF_TRACK = 0x2F,
+ ET_TEMPO_SETTING = 0x51,
+ ET_SMPTE_OFFSET = 0x54,
+ ET_TIME_SIGNATURE = 0x58,
+ ET_KEY_SIGNATURE = 0x59,
+ ET_SEQUENCE_SPECIRFIC_EVENT = 0x7F
+ };
+
+
+/**
+ * Main entry method for the 'audio/midi' extraction plugin.
+ *
+ * @param ec extraction context provided to the plugin
+ */
+void
+EXTRACTOR_midi_extract_method (struct EXTRACTOR_ExtractContext *ec)
+{
+ void *buf;
+ unsigned char *data;
+ uint64_t size;
+ uint64_t off;
+ ssize_t iret;
+ smf_t *m = NULL;
+ smf_event_t *event;
+ uint8_t len;
+
+ if (4 >= (iret = ec->read (ec->cls, &buf, 1024)))
+ return;
+ data = buf;
+ if ( (data[0] != 0x4D) || (data[1] != 0x54) ||
+ (data[2] != 0x68) || (data[3] != 0x64) )
+ return; /* cannot be MIDI */
+ size = ec->get_size (ec->cls);
+ if (size > 16 * 1024 * 1024)
+ return; /* too large */
+ if (NULL == (data = malloc ((size_t) size)))
+ return; /* out of memory */
+ memcpy (data, buf, iret);
+ off = iret;
+ while (off < size)
+ {
+ if (0 >= (iret = ec->read (ec->cls, &buf, 16 * 1024)))
+ {
+ free (data);
+ return;
+ }
+ memcpy (&data[off], buf, iret);
+ off += iret;
+ }
+ if (0 != ec->proc (ec->cls,
+ "midi",
+ EXTRACTOR_METATYPE_MIMETYPE,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ "audio/midi",
+ strlen ("audio/midi") + 1))
+ goto CLEANUP;
+ if (NULL == (m = smf_load_from_memory (data, size)))
+ goto CLEANUP;
+ while (NULL != (event = smf_get_next_event (m)))
+ {
+ if (! smf_event_is_metadata (event))
+ break;
+ len = event->midi_buffer[2];
+ if ( (len > 0) &&
+ isspace (event->midi_buffer[2 + len]))
+ len--;
+#if 0
+ fprintf (stderr,
+ "type: %d, len: %d value: %.*s\n",
+ event->midi_buffer[1],
+ event->midi_buffer[2],
+ (int) event->midi_buffer_length - 3,
+ (char *) &event->midi_buffer[3]);
+#endif
+ if (1 != event->track_number)
+ continue; /* heuristic to not get instruments */
+ if (0 == len)
+ continue;
+ switch (event->midi_buffer[1])
+ {
+ case ET_TEXT_EVENT:
+ if (0 != ec->proc (ec->cls,
+ "midi",
+ EXTRACTOR_METATYPE_COMMENT,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ (void*) &event->midi_buffer[3],
+ len))
+ goto CLEANUP;
+ break;
+ case ET_COPYRIGHT_NOTICE:
+ if (0 != ec->proc (ec->cls,
+ "midi",
+ EXTRACTOR_METATYPE_COPYRIGHT,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ (void*) &event->midi_buffer[3],
+ len))
+ goto CLEANUP;
+ break;
+ case ET_TRACK_NAME:
+ if (0 != ec->proc (ec->cls,
+ "midi",
+ EXTRACTOR_METATYPE_TITLE,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ (void*) &event->midi_buffer[3],
+ len))
+ goto CLEANUP;
+ break;
+ case ET_INSTRUMENT_NAME:
+ if (0 != ec->proc (ec->cls,
+ "midi",
+ EXTRACTOR_METATYPE_SOURCE_DEVICE,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ (void*) &event->midi_buffer[3],
+ len))
+ goto CLEANUP;
+ break;
+ case ET_LYRIC_TEXT:
+ if (0 != ec->proc (ec->cls,
+ "midi",
+ EXTRACTOR_METATYPE_LYRICS,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ (void*) &event->midi_buffer[3],
+ len))
+ goto CLEANUP;
+ break;
+ default:
+ break;
+ }
+ }
+
+ CLEANUP:
+ if (NULL != m)
+ smf_delete (m);
+ free (data);
+}
+
+
+/* end of midi_extractor.c */
diff --git a/src/plugins/test_midi.c b/src/plugins/test_midi.c
@@ -0,0 +1,92 @@
+/*
+ This file is part of libextractor.
+ (C) 2012 Vidyut Samanta and Christian Grothoff
+
+ libextractor is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, or (at your
+ option) any later version.
+
+ libextractor 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with libextractor; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+/**
+ * @file plugins/test_midi.c
+ * @brief testcase for midi plugin
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "test_lib.h"
+
+
+/**
+ * Main function for the MIDI testcase.
+ *
+ * @param argc number of arguments (ignored)
+ * @param argv arguments (ignored)
+ * @return 0 on success
+ */
+int
+main (int argc, char *argv[])
+{
+ struct SolutionData midi_dth_sol[] =
+ {
+ {
+ EXTRACTOR_METATYPE_MIMETYPE,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ "audio/midi",
+ strlen ("audio/midi") + 1,
+ 0
+ },
+ {
+ EXTRACTOR_METATYPE_COPYRIGHT,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ "(c) 2012 d-o-o",
+ strlen ("(c) 2012 d-o-o"),
+ 0
+ },
+ {
+ EXTRACTOR_METATYPE_TITLE,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ "Tage wie diese T2",
+ strlen ("Tage wie diese T2"),
+ 0
+ },
+ {
+ EXTRACTOR_METATYPE_COMMENT,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ "XFhd:::Rock:8 Beat:1:m1:-:-:-:-:DD",
+ strlen ("XFhd:::Rock:8 Beat:1:m1:-:-:-:-:DD"),
+ 0
+ },
+ {
+ EXTRACTOR_METATYPE_COMMENT,
+ EXTRACTOR_METAFORMAT_UTF8,
+ "text/plain",
+ "XFln:L1:Tage wie diese:von Holst:von Holst:-:Toten Hosen:DD",
+ strlen ("XFln:L1:Tage wie diese:von Holst:von Holst:-:Toten Hosen:DD"),
+ 0
+ },
+ { 0, 0, NULL, NULL, 0, -1 }
+ };
+ struct ProblemSet ps[] =
+ {
+ { "testdata/midi_dth.mid",
+ midi_dth_sol },
+ { NULL, NULL }
+ };
+ return ET_main ("midi", ps);
+}
+
+/* end of test_midi.c */
diff --git a/src/plugins/testdata/midi_dth.mid b/src/plugins/testdata/midi_dth.mid
Binary files differ.
