merge with mpd/trunk up to r3925

git-svn-id: https://svn.musicpd.org/mpd/trunk@3926 09075e82-0dd4-0310-85a5-a0d7c8717e4f

1 files changed, 195 insertions, 0 deletions

diff --git a/src/inputPlugins/_flac_common.c b/src/inputPlugins/_flac_common.c
new file mode 100644
index 000000000..f6a470ed2
--- /dev/null
+++ b/src/inputPlugins/_flac_common.c
@@ -0,0 +1,195 @@
+/* the Music Player Daemon (MPD)
+ * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
+ * This project's homepage is: http://www.musicpd.org
+ *
+ * Common data structures and functions used by FLAC and OggFLAC
+ * (c) 2005 by Eric Wong <normalperson@yhbt.net>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include "../inputPlugin.h"
+
+#if defined(HAVE_FLAC) || defined(HAVE_OGGFLAC)
+
+#include "_flac_common.h"
+
+#include "../log.h"
+#include "../tag.h"
+#include "../inputStream.h"
+#include "../outputBuffer.h"
+#include "../decode.h"
+#include "../replayGain.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <FLAC/format.h>
+#include <FLAC/metadata.h>
+
+void init_FlacData (FlacData * data, OutputBuffer * cb,
+		DecoderControl * dc, InputStream * inStream)
+{
+	data->chunk_length = 0;
+	data->time = 0;
+	data->position = 0;
+	data->bitRate = 0;
+	data->cb = cb;
+	data->dc = dc;
+	data->inStream = inStream;
+	data->replayGainInfo = NULL;
+	data->tag = NULL;
+}
+
+static int flacFindVorbisCommentFloat(const FLAC__StreamMetadata * block,
+		char * cmnt, float * fl)
+{
+	int offset = FLAC__metadata_object_vorbiscomment_find_entry_from(
+			block,0,cmnt);
+
+	if(offset >= 0) {
+		size_t pos = strlen(cmnt)+1; /* 1 is for '=' */
+		int len = block->data.vorbis_comment.comments[offset].length
+				-pos;
+		if(len > 0) {
+			unsigned char tmp;
+			unsigned char * dup = &(block->data.vorbis_comment.
+						comments[offset].entry[pos]);
+			tmp = dup[len];
+			dup[len] = '\0';
+			*fl = atof((char *)dup);
+			dup[len] = tmp;
+			
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+/* replaygain stuff by AliasMrJones */
+static void flacParseReplayGain(const FLAC__StreamMetadata *block,
+				FlacData * data) {
+	unsigned int found = 0;
+
+	if (data->replayGainInfo)
+		freeReplayGainInfo(data->replayGainInfo);
+
+	data->replayGainInfo = newReplayGainInfo();
+
+	found &= flacFindVorbisCommentFloat(block,"replaygain_album_gain",
+					&data->replayGainInfo->albumGain);
+	found &= flacFindVorbisCommentFloat(block,"replaygain_album_peak",
+					&data->replayGainInfo->albumPeak);
+	found &= flacFindVorbisCommentFloat(block,"replaygain_track_gain",
+					&data->replayGainInfo->trackGain);
+	found &= flacFindVorbisCommentFloat(block,"replaygain_track_peak",
+					&data->replayGainInfo->trackPeak);
+
+	if (!found) {
+		freeReplayGainInfo(data->replayGainInfo);
+		data->replayGainInfo = NULL;
+	}
+}
+
+/* tracknumber is used in VCs, MPD uses "track" ..., all the other
+ * tag names match */
+static const char * VORBIS_COMMENT_TRACK_KEY = "tracknumber";
+
+static unsigned int commentMatchesAddToTag(
+		const FLAC__StreamMetadata_VorbisComment_Entry * entry,
+		unsigned int itemType,
+		MpdTag ** tag)
+{
+	const char * str = (itemType == TAG_ITEM_TRACK) ?
+			VORBIS_COMMENT_TRACK_KEY : mpdTagItemKeys[itemType];
+	size_t slen = strlen(str);
+	int vlen = entry->length - slen - 1;
+
+	if ((vlen > 0) && (0 == strncasecmp(str,(char *)entry->entry, slen))
+				&& (*(entry->entry + slen) == '=')) {
+		if (!*tag)
+			*tag = newMpdTag();
+		
+		addItemToMpdTagWithLen(*tag, itemType, 
+				(char *)(entry->entry+slen + 1), vlen);
+		
+		return 1;
+	}
+	
+	return 0;
+}
+		
+MpdTag * copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block, 
+		MpdTag * tag)
+{
+	unsigned int i, j;
+	FLAC__StreamMetadata_VorbisComment_Entry *comments;
+	
+	comments = block->data.vorbis_comment.comments;
+	
+	for (i = block->data.vorbis_comment.num_comments; i != 0; --i) {
+		for (j = TAG_NUM_OF_ITEM_TYPES; j--; ) {
+			if (commentMatchesAddToTag(comments, j, &tag))
+				break;
+		}
+		comments++;
+	}
+
+	return tag;
+}
+
+void flac_metadata_common_cb(const FLAC__StreamMetadata *block, FlacData *data)
+{
+	DecoderControl *dc = data->dc;
+	const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info);
+
+	switch(block->type) {
+	case FLAC__METADATA_TYPE_STREAMINFO:
+		dc->audioFormat.bits = si->bits_per_sample;
+		dc->audioFormat.sampleRate = si->sample_rate;
+		dc->audioFormat.channels = si->channels;
+		dc->totalTime = ((float)si->total_samples) / (si->sample_rate);
+		getOutputAudioFormat(&(dc->audioFormat),
+				&(data->cb->audioFormat));
+		break;
+	case FLAC__METADATA_TYPE_VORBIS_COMMENT:
+		flacParseReplayGain(block,data);
+        default:
+                break;
+	}
+}
+
+void flac_error_common_cb(	const char * plugin,
+				const FLAC__StreamDecoderErrorStatus status,
+				FlacData *data)
+{
+	if(data->dc->stop) return;
+
+	switch(status) {
+	case FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC:
+		ERROR("%s lost sync\n", plugin);
+		break;
+	case FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER:
+		ERROR("bad %s header\n", plugin);
+		break;
+	case FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH:
+		ERROR("%s crc mismatch\n", plugin);
+		break;
+	default:
+		ERROR("unknown %s error\n",plugin);
+	}
+}
+
+#endif /* HAVE_FLAC || HAVE_OGGFLAC */