renamed src/inputPlugins/ to src/decoder/

These plugins are not input plugins, they are decoder plugins.  No
CamelCase in the directory name.

1 files changed, 323 insertions, 0 deletions

diff --git a/src/decoder/_flac_common.c b/src/decoder/_flac_common.c
new file mode 100644
index 000000000..db43e0003
--- /dev/null
+++ b/src/decoder/_flac_common.c
@@ -0,0 +1,323 @@
+/* the Music Player Daemon (MPD)
+ * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
+ * 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 "_flac_common.h"
+#include "../log.h"
+
+#include <FLAC/format.h>
+#include <FLAC/metadata.h>
+
+void init_FlacData(FlacData * data, struct decoder * decoder,
+		   InputStream * inStream)
+{
+	data->time = 0;
+	data->position = 0;
+	data->bitRate = 0;
+	data->decoder = decoder;
+	data->inStream = inStream;
+	data->replayGainInfo = NULL;
+	data->tag = NULL;
+}
+
+static int flacFindVorbisCommentFloat(const FLAC__StreamMetadata * block,
+				      const 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 *p = &(block->data.vorbis_comment.
+					     comments[offset].entry[pos]);
+			tmp = p[len];
+			p[len] = '\0';
+			*fl = (float)atof((char *)p);
+			p[len] = tmp;
+
+			return 1;
+		}
+	}
+
+	return 0;
+}
+
+/* replaygain stuff by AliasMrJones */
+static void flacParseReplayGain(const FLAC__StreamMetadata * block,
+				FlacData * data)
+{
+	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 const char *VORBIS_COMMENT_DISC_KEY = "discnumber";
+
+static unsigned int commentMatchesAddToTag(const
+					   FLAC__StreamMetadata_VorbisComment_Entry
+					   * entry, unsigned int itemType,
+					   struct tag ** tag)
+{
+	const char *str;
+	size_t slen;
+	int vlen;
+
+	switch (itemType) {
+	case TAG_ITEM_TRACK:
+		str = VORBIS_COMMENT_TRACK_KEY;
+		break;
+	case TAG_ITEM_DISC:
+		str = VORBIS_COMMENT_DISC_KEY;
+		break;
+	default:
+		str = mpdTagItemKeys[itemType];
+	}
+	slen = strlen(str);
+	vlen = entry->length - slen - 1;
+
+	if ((vlen > 0) && (0 == strncasecmp(str, (char *)entry->entry, slen))
+	    && (*(entry->entry + slen) == '=')) {
+		if (!*tag)
+			*tag = tag_new();
+
+		tag_add_item_n(*tag, itemType,
+			       (char *)(entry->entry + slen + 1), vlen);
+
+		return 1;
+	}
+
+	return 0;
+}
+
+struct tag *copyVorbisCommentBlockToMpdTag(const FLAC__StreamMetadata * block,
+					   struct tag * 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)
+{
+	const FLAC__StreamMetadata_StreamInfo *si = &(block->data.stream_info);
+
+	switch (block->type) {
+	case FLAC__METADATA_TYPE_STREAMINFO:
+		data->audio_format.bits = (int8_t)si->bits_per_sample;
+		data->audio_format.sample_rate = si->sample_rate;
+		data->audio_format.channels = (int8_t)si->channels;
+		data->total_time = ((float)si->total_samples) / (si->sample_rate);
+		break;
+	case FLAC__METADATA_TYPE_VORBIS_COMMENT:
+		flacParseReplayGain(block, data);
+	default:
+		break;
+	}
+}
+
+void flac_error_common_cb(const char *plugin,
+			  const FLAC__StreamDecoderErrorStatus status,
+			  mpd_unused FlacData * data)
+{
+	if (decoder_get_command(data->decoder) == DECODE_COMMAND_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);
+	}
+}
+
+static void flac_convert_stereo16(int16_t *dest,
+				  const FLAC__int32 * const buf[],
+				  unsigned int position, unsigned int end)
+{
+	for (; position < end; ++position) {
+		*dest++ = buf[0][position];
+		*dest++ = buf[1][position];
+	}
+}
+
+static void
+flac_convert_16(int16_t *dest,
+		unsigned int num_channels,
+		const FLAC__int32 * const buf[],
+		unsigned int position, unsigned int end)
+{
+	unsigned int c_chan;
+
+	for (; position < end; ++position)
+		for (c_chan = 0; c_chan < num_channels; c_chan++)
+			*dest++ = buf[c_chan][position];
+}
+
+/**
+ * Note: this function also handles 24 bit files!
+ */
+static void
+flac_convert_32(int32_t *dest,
+		unsigned int num_channels,
+		const FLAC__int32 * const buf[],
+		unsigned int position, unsigned int end)
+{
+	unsigned int c_chan;
+
+	for (; position < end; ++position)
+		for (c_chan = 0; c_chan < num_channels; c_chan++)
+			*dest++ = buf[c_chan][position];
+}
+
+static void
+flac_convert_8(int8_t *dest,
+	       unsigned int num_channels,
+	       const FLAC__int32 * const buf[],
+	       unsigned int position, unsigned int end)
+{
+	unsigned int c_chan;
+
+	for (; position < end; ++position)
+		for (c_chan = 0; c_chan < num_channels; c_chan++)
+			*dest++ = buf[c_chan][position];
+}
+
+static void flac_convert(unsigned char *dest,
+			 unsigned int num_channels,
+			 unsigned int bytes_per_sample,
+			 const FLAC__int32 * const buf[],
+			 unsigned int position, unsigned int end)
+{
+	switch (bytes_per_sample) {
+	case 2:
+		if (num_channels == 2)
+			flac_convert_stereo16((int16_t*)dest, buf,
+					      position, end);
+		else
+			flac_convert_16((int16_t*)dest, num_channels, buf,
+					position, end);
+		break;
+
+	case 4:
+		flac_convert_32((int32_t*)dest, num_channels, buf,
+				position, end);
+		break;
+
+	case 1:
+		flac_convert_8((int8_t*)dest, num_channels, buf,
+			       position, end);
+		break;
+	}
+}
+
+FLAC__StreamDecoderWriteStatus
+flac_common_write(FlacData *data, const FLAC__Frame * frame,
+		  const FLAC__int32 *const buf[])
+{
+	unsigned int c_samp;
+	const unsigned int num_channels = frame->header.channels;
+	const unsigned int bytes_per_sample =
+		audio_format_sample_size(&data->audio_format);
+	const unsigned int bytes_per_channel =
+		bytes_per_sample * frame->header.channels;
+	const unsigned int max_samples = FLAC_CHUNK_SIZE / bytes_per_channel;
+	unsigned int num_samples;
+	enum decoder_command cmd;
+
+	if (bytes_per_sample != 1 && bytes_per_sample != 2 &&
+	    bytes_per_sample != 4)
+		/* exotic unsupported bit rate */
+		return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+
+	for (c_samp = 0; c_samp < frame->header.blocksize;
+	     c_samp += num_samples) {
+		num_samples = frame->header.blocksize - c_samp;
+		if (num_samples > max_samples)
+			num_samples = max_samples;
+
+		flac_convert(data->chunk,
+			     num_channels, bytes_per_sample, buf,
+			     c_samp, c_samp + num_samples);
+
+		cmd = decoder_data(data->decoder, data->inStream,
+				   1, data->chunk,
+				   num_samples * bytes_per_channel,
+				   data->time, data->bitRate,
+				   data->replayGainInfo);
+		switch (cmd) {
+		case DECODE_COMMAND_NONE:
+		case DECODE_COMMAND_START:
+			break;
+
+		case DECODE_COMMAND_STOP:
+			return
+				FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
+
+		case DECODE_COMMAND_SEEK:
+			return
+				FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+		}
+	}
+
+	return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
+}