decoder/mp4v2: remove because of incompatible license

libmp4v2 is licensed under MPL 1.1, which is incompatible with GPLv2.
Unfortunately, this means that we must remove the plugin.

More information can be found in the Debian bug report:

 http://bugs.debian.org/767504

7 files changed, 1 insertions, 394 deletions

diff --git a/INSTALL b/INSTALL
index 2a4a4c3c4..29a23d361 100644
--- a/INSTALL
+++ b/INSTALL
@@ -119,9 +119,6 @@ For AdLib playback.
 despotify - https://github.com/SimonKagstrom/despotify
 For Spotify playback.
 
-MP4v2 - https://code.google.com/p/mp4v2/
-For MP4 playback. You will need FAAD2.
-
 
 Optional Miscellaneous Dependencies
 -----------------------------------
diff --git a/Makefile.am b/Makefile.am
index 72b6a0ca4..874e37d10 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -828,7 +828,6 @@ libdecoder_a_CPPFLAGS = $(AM_CPPFLAGS) \
 	$(WAVPACK_CFLAGS) \
 	$(MAD_CFLAGS) \
 	$(MPG123_CFLAGS) \
-	$(MP4V2_CFLAGS) \
 	$(OPUS_CFLAGS) \
 	$(FFMPEG_CFLAGS) \
 	$(MPCDEC_CFLAGS) \
@@ -848,7 +847,6 @@ DECODER_LIBS = \
 	$(WAVPACK_LIBS) \
 	$(MAD_LIBS) \
 	$(MPG123_LIBS) \
-	$(MP4V2_LIBS) \
 	$(OPUS_LIBS) \
 	$(FFMPEG_LIBS2) \
 	$(MPCDEC_LIBS) \
@@ -963,12 +961,6 @@ noinst_LIBRARIES += libmodplug_decoder_plugin.a
 DECODER_LIBS += libmodplug_decoder_plugin.a $(MODPLUG_LIBS)
 endif
 
-if HAVE_MP4V2
-libdecoder_a_SOURCES += \
-	src/decoder/plugins/Mp4v2DecoderPlugin.cxx \
-	src/decoder/plugins/Mp4v2DecoderPlugin.hxx
-endif
-
 if ENABLE_SIDPLAY
 libdecoder_a_SOURCES += \
 	src/decoder/plugins/SidplayDecoderPlugin.cxx \
diff --git a/NEWS b/NEWS
index fb5fd19b5..7d04d528c 100644
--- a/NEWS
+++ b/NEWS
@@ -1,6 +1,7 @@
 ver 0.19.5 (not yet released)
 * decoder
   - dsdiff, dsf, opus: fix deadlock while seeking
+  - mp4v2: remove because of incompatible license
 
 ver 0.19.4 (2014/11/18)
 * protocol
diff --git a/configure.ac b/configure.ac
index 5a44fa5c8..f8d100331 100644
--- a/configure.ac
+++ b/configure.ac
@@ -496,11 +496,6 @@ AC_ARG_ENABLE(modplug,
 		[enable modplug decoder plugin]),,
 	enable_modplug=auto)
 
-AC_ARG_ENABLE(mp4v2,
-	AS_HELP_STRING([--enable-mp4v2],
-		[enable libmp4v2 decoder plugin]),,
-	enable_mp4v2=auto)
-
 AC_ARG_ENABLE(mpc,
 	AS_HELP_STRING([--enable-mpc],
 		[disable musepack (MPC) support (default: auto)]),,
@@ -1264,24 +1259,6 @@ if test x$enable_modplug = xyes; then
 fi
 AM_CONDITIONAL(HAVE_MODPLUG, test x$enable_modplug = xyes)
 
-dnl -------------------------------- libmp4v2 ---------------------------------
-if test x$enable_aac = xyes; then
-        MPD_AUTO_LIB(mp4v2, MP4V2, mp4v2, MP4Create, [-lmp4v2], [],
-	                    [mp4v2], [libmp4v2 not found])
-
-        if test x$enable_mp4v2 = xyes; then
-	        AC_DEFINE(HAVE_MP4V2, 1, [Define to use libmp4v2 for MP4 decoding])
-        fi
-else
-     if test x$enable_mp4v2 = xyes; then
-        AC_MSG_ERROR([MP4V2 requires AAC!])
-     fi
-
-     enable_mp4v2=no
-fi
-
-AM_CONDITIONAL(HAVE_MP4V2, test x$enable_mp4v2 = xyes)
-
 dnl -------------------------------- libopus ----------------------------------
 MPD_AUTO_PKG(opus, OPUS, [opus ogg],
 	[opus decoder plugin], [libopus not found])
@@ -1868,7 +1845,6 @@ printf '\n\t'
 results(sndfile, [libsndfile])
 results(mikmod, [MikMod])
 results(modplug, [MODPLUG])
-results(mp4v2, [MP4V2])
 results(mad, [MAD])
 results(mpg123, [MPG123])
 results(mpc, [Musepack])
diff --git a/src/decoder/DecoderList.cxx b/src/decoder/DecoderList.cxx
index 0a31d9eac..cd6881ce2 100644
--- a/src/decoder/DecoderList.cxx
+++ b/src/decoder/DecoderList.cxx
@@ -37,7 +37,6 @@
 #include "plugins/MadDecoderPlugin.hxx"
 #include "plugins/SndfileDecoderPlugin.hxx"
 #include "plugins/Mpg123DecoderPlugin.hxx"
-#include "plugins/Mp4v2DecoderPlugin.hxx"
 #include "plugins/WildmidiDecoderPlugin.hxx"
 #include "plugins/MikmodDecoderPlugin.hxx"
 #include "plugins/ModplugDecoderPlugin.hxx"
@@ -55,9 +54,6 @@ const struct DecoderPlugin *const decoder_plugins[] = {
 #ifdef HAVE_MPG123
 	&mpg123_decoder_plugin,
 #endif
-#ifdef HAVE_MP4V2
-	&mp4v2_decoder_plugin,
-#endif
 #ifdef ENABLE_VORBIS_DECODER
 	&vorbis_decoder_plugin,
 #endif
diff --git a/src/decoder/plugins/Mp4v2DecoderPlugin.cxx b/src/decoder/plugins/Mp4v2DecoderPlugin.cxx
deleted file mode 100644
index 34bccd243..000000000
--- a/src/decoder/plugins/Mp4v2DecoderPlugin.cxx
+++ /dev/null
@@ -1,330 +0,0 @@
-/*
- * Copyright (C) 2003-2014 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include "config.h" /* must be first for large file support */
-#include "Mp4v2DecoderPlugin.hxx"
-#include "../DecoderAPI.hxx"
-#include "CheckAudioFormat.hxx"
-#include "tag/TagHandler.hxx"
-#include "fs/Path.hxx"
-#include "util/Error.hxx"
-#include "util/Domain.hxx"
-#include "Log.hxx"
-
-#include <mp4v2/mp4v2.h>
-#include <neaacdec.h>
-
-#include <cstdio>
-#include <cstdlib>
-
-static constexpr Domain mp4v2_decoder_domain("mp4v2");
-
-static MP4TrackId
-mp4_get_aac_track(MP4FileHandle handle, NeAACDecHandle decoder,
-		  AudioFormat &audio_format, Error &error)
-{
-	unsigned long sample_rate;
-
-	const MP4TrackId tracks = MP4GetNumberOfTracks(handle);
-
-	for (MP4TrackId id = 1; id <= tracks; id++) {
-		const char* track_type = MP4GetTrackType(handle, id);
-
-		if (track_type == 0)
-			continue;
-
-		const auto obj_type = MP4GetTrackEsdsObjectTypeId(handle, id);
-
-		if (obj_type == MP4_INVALID_AUDIO_TYPE)
-			continue;
-		if (obj_type == MP4_MPEG4_AUDIO_TYPE) {
-			const auto mpeg_type = MP4GetTrackAudioMpeg4Type(handle, id);
-			if (!MP4_IS_MPEG4_AAC_AUDIO_TYPE(mpeg_type))
-				continue;
-		} else if (!MP4_IS_AAC_AUDIO_TYPE(obj_type))
-			continue;
-
-		if (decoder == nullptr)
-			/* found audio track, no decoder */
-			return id;
-
-		unsigned char *buff = nullptr;
-		unsigned buff_size = 0;
-
-		if (!MP4GetTrackESConfiguration(handle, id, &buff, &buff_size))
-			continue;
-
-		uint8_t channels;
-		int32_t nbytes = NeAACDecInit(decoder, buff, buff_size,
-					      &sample_rate, &channels);
-
-		free(buff);
-
-		if (nbytes < 0)
-			/* invalid stream */
-			continue;
-
-		if (!audio_format_init_checked(audio_format, sample_rate,
-					       SampleFormat::S16,
-					       channels,
-					       error))
-			continue;
-
-		return id;
-	}
-
-	error.Set(mp4v2_decoder_domain, "no valid aac track found");
-
-	return MP4_INVALID_TRACK_ID;
-}
-
-static NeAACDecHandle
-mp4_faad_new(MP4FileHandle handle, AudioFormat &audio_format, Error &error)
-{
-	const NeAACDecHandle decoder = NeAACDecOpen();
-	const NeAACDecConfigurationPtr config =
-		NeAACDecGetCurrentConfiguration(decoder);
-	config->outputFormat = FAAD_FMT_16BIT;
-	config->downMatrix = 1;
-	config->dontUpSampleImplicitSBR = 0;
-	NeAACDecSetConfiguration(decoder, config);
-
-	const auto track = mp4_get_aac_track(handle, decoder, audio_format, error);
-
-	if (track == MP4_INVALID_TRACK_ID) {
-		NeAACDecClose(decoder);
-		return nullptr;
-	}
-
-	return decoder;
-}
-
-static void
-mp4_file_decode(Decoder &mpd_decoder, Path path_fs)
-{
-	const MP4FileHandle handle = MP4Read(path_fs.c_str());
-
-	if (handle == MP4_INVALID_FILE_HANDLE) {
-		FormatError(mp4v2_decoder_domain,
-			  "unable to open file");
-		return;
-	}
-
-	AudioFormat audio_format;
-	Error error;
-	const NeAACDecHandle decoder = mp4_faad_new(handle, audio_format, error);
-
-	if (decoder == nullptr) {
-		LogError(error);
-		MP4Close(handle);
-		return;
-	}
-
-	const MP4TrackId track = mp4_get_aac_track(handle, nullptr, audio_format, error);
-
-	/* initialize the MPD core */
-
-	const MP4Timestamp scale = MP4GetTrackTimeScale(handle, track);
-	const SongTime duration = SongTime::FromScale<uint64_t>(MP4GetTrackDuration(handle, track),
-								scale);
-	const MP4SampleId num_samples = MP4GetTrackNumberOfSamples(handle, track);
-
-	decoder_initialized(mpd_decoder, audio_format, true, duration);
-
-	/* the decoder loop */
-
-	DecoderCommand cmd = DecoderCommand::NONE;
-
-	for (MP4SampleId sample = 1;
-	     sample < num_samples && cmd != DecoderCommand::STOP;
-	     sample++) {
-		unsigned char *data = nullptr;
-		unsigned int data_length = 0;
-
-		if (cmd == DecoderCommand::SEEK) {
-			const MP4Timestamp offset =
-				decoder_seek_time(mpd_decoder).ToScale(scale);
-
-			sample = MP4GetSampleIdFromTime(handle, track, offset,
-							false);
-			decoder_command_finished(mpd_decoder);
-		}
-
-		/* read */
-		if (MP4ReadSample(handle, track, sample, &data, &data_length) == 0) {
-			FormatError(mp4v2_decoder_domain, "unable to read sample");
-			break;
-		}
-
-		/* decode it */
-		NeAACDecFrameInfo frame_info;
-		const void *const decoded = NeAACDecDecode(decoder, &frame_info, data, data_length);
-
-		if (frame_info.error > 0) {
-			FormatWarning(mp4v2_decoder_domain,
-				      "error decoding AAC stream: %s",
-				      NeAACDecGetErrorMessage(frame_info.error));
-			break;
-		}
-
-		if (frame_info.channels != audio_format.channels) {
-			FormatDefault(mp4v2_decoder_domain,
-				      "channel count changed from %u to %u",
-				      audio_format.channels, frame_info.channels);
-			break;
-		}
-
-		if (frame_info.samplerate != audio_format.sample_rate) {
-			FormatDefault(mp4v2_decoder_domain,
-				      "sample rate changed from %u to %lu",
-				      audio_format.sample_rate,
-				      (unsigned long)frame_info.samplerate);
-			break;
-		}
-
-		/* update bit rate and position */
-		unsigned bit_rate = 0;
-
-		if (frame_info.samples > 0) {
-			bit_rate = frame_info.bytesconsumed * 8.0 *
-			    frame_info.channels * audio_format.sample_rate /
-			    frame_info.samples / 1000 + 0.5;
-		}
-
-		/* send PCM samples to MPD */
-
-		cmd = decoder_data(mpd_decoder, nullptr, decoded,
-				   (size_t)frame_info.samples * 2,
-				   bit_rate);
-
-		free(data);
-	}
-
-	/* cleanup */
-	NeAACDecClose(decoder);
-	MP4Close(handle);
-}
-
-static inline void
-mp4_safe_invoke_tag(const struct tag_handler *handler, void *handler_ctx,
-		    TagType tag, const char *value)
-{
-	if (value != nullptr)
-		tag_handler_invoke_tag(handler, handler_ctx, tag, value);
-}
-
-static bool
-mp4_scan_file(Path path_fs,
-		 const struct tag_handler *handler, void *handler_ctx)
-{
-	const MP4FileHandle handle = MP4Read(path_fs.c_str());
-
-	if (handle == MP4_INVALID_FILE_HANDLE)
-		return false;
-
-	AudioFormat tmp_audio_format;
-	Error error;
-	const MP4TrackId id = mp4_get_aac_track(handle, nullptr, tmp_audio_format, error);
-
-	if (id == MP4_INVALID_TRACK_ID) {
-		LogError(error);
-		MP4Close(handle);
-		return false;
-	}
-
-	const MP4Timestamp scale = MP4GetTrackTimeScale(handle, id);
-	const SongTime dur =
-		SongTime::FromScale<uint64_t>(MP4GetTrackDuration(handle, id),
-					      scale);
-	tag_handler_invoke_duration(handler, handler_ctx, dur);
-
-	const MP4Tags* tags = MP4TagsAlloc();
-	MP4TagsFetch(tags, handle);
-
-	static constexpr struct {
-		const char *MP4Tags::*p;
-		TagType tag_type;
-	} mp4v2_tags[] = {
-		{ &MP4Tags::name, TAG_NAME },
-		{ &MP4Tags::artist, TAG_ARTIST },
-		{ &MP4Tags::albumArtist, TAG_ALBUM_ARTIST },
-		{ &MP4Tags::album, TAG_ALBUM },
-		{ &MP4Tags::composer, TAG_COMPOSER },
-		{ &MP4Tags::comments, TAG_COMMENT },
-		{ &MP4Tags::genre, TAG_GENRE },
-		{ &MP4Tags::releaseDate, TAG_DATE },
-		{ &MP4Tags::sortArtist, TAG_ARTIST_SORT },
-		{ &MP4Tags::sortAlbumArtist, TAG_ALBUM_ARTIST_SORT },
-	};
-
-	for (const auto &i : mp4v2_tags)
-		mp4_safe_invoke_tag(handler, handler_ctx,
-				    i.tag_type, tags->*i.p);
-
-	char buff[8]; /* tmp buffer for index to string. */
-	if (tags->track != nullptr) {
-		sprintf(buff, "%d", tags->track->index);
-		tag_handler_invoke_tag(handler, handler_ctx, TAG_TRACK, buff);
-	}
-
-	if (tags->disk != nullptr) {
-		sprintf(buff, "%d", tags->disk->index);
-		tag_handler_invoke_tag(handler, handler_ctx, TAG_DISC, buff);
-	}
-
-	MP4TagsFree(tags);
-	MP4Close(handle);
-
-	return true;
-}
-
-static const char *const mp4_suffixes[] = {
-	"mp4",
-	"m4a",
-	/* "m4p", encrypted */
-	/* "m4b", audio book */
-	/* "m4r", ring tones */
-	/* "m4v", video */
-	nullptr
-};
-
-static const char *const mp4_mime_types[] = {
-	"application/mp4",
-	"application/m4a",
-	"audio/mp4",
-	"audio/m4a",
-	/* "audio/m4p", */
-	/* "audio/m4b", */
-	/* "audio/m4r", */
-	/* "audio/m4v", */
-	nullptr
-};
-
-const struct DecoderPlugin mp4v2_decoder_plugin = {
-	"mp4v2",
-	nullptr,
-	nullptr,
-	nullptr,
-	mp4_file_decode,
-	mp4_scan_file,
-	nullptr,
-	nullptr,
-	mp4_suffixes,
-	mp4_mime_types
-};
diff --git a/src/decoder/plugins/Mp4v2DecoderPlugin.hxx b/src/decoder/plugins/Mp4v2DecoderPlugin.hxx
deleted file mode 100644
index 57585dec4..000000000
--- a/src/decoder/plugins/Mp4v2DecoderPlugin.hxx
+++ /dev/null
@@ -1,25 +0,0 @@
-/*
- * Copyright (C) 2003-2014 The Music Player Daemon Project
- * http://www.musicpd.org
- *
- * This program 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 2 of the License, or
- * (at your option) any later version.
- *
- * This program 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 this program; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#ifndef MPD_DECODER_MP4V2_HXX
-#define MPD_DECODER_MP4V2_HXX
-
-extern const struct DecoderPlugin mp4v2_decoder_plugin;
-
-#endif