* Add new WAV parsing files.

2 files changed, 202 insertions, 0 deletions

diff --git a/tagutils/tagutils-wav.c b/tagutils/tagutils-wav.c
new file mode 100644
index 0000000..6f9f1a5
--- /dev/null
+++ b/tagutils/tagutils-wav.c
@@ -0,0 +1,178 @@
+//=========================================================================
+// FILENAME	: tagutils-wav.c
+// DESCRIPTION	: WAV metadata reader
+//=========================================================================
+// Copyright (c) 2009 NETGEAR, Inc. All Rights Reserved.
+// based on software from Ron Pedde's FireFly Media Server project
+//=========================================================================
+
+/*
+ * 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
+ */
+
+#define GET_WAV_INT32(p) ((((uint32_t)((p)[3])) << 24) |   \
+			  (((uint32_t)((p)[2])) << 16) |   \
+			  (((uint32_t)((p)[1])) << 8) |	   \
+			  (((uint32_t)((p)[0]))))
+
+#define GET_WAV_INT16(p) ((((uint32_t)((p)[1])) << 8) |	   \
+			  (((uint32_t)((p)[0]))))
+
+static int
+_get_wavtags(char *filename, struct song_metadata *psong)
+{
+	int fd;
+	uint32_t len;
+	unsigned char hdr[12];
+	unsigned char fmt[16];
+	uint32_t chunk_data_length;
+	uint32_t format_data_length = 0;
+	uint32_t compression_code = 0;
+	uint32_t channel_count = 0;
+	uint32_t sample_rate = 0;
+	uint32_t sample_bit_length = 0;
+	uint32_t bit_rate;
+	uint32_t data_length = 0;
+	uint32_t sec, ms;
+
+	uint32_t current_offset;
+	uint32_t block_len;
+
+	int found_fmt = 0;
+	int found_data = 0;
+
+	//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Getting WAV file info\n");
+
+	if(!(fd = open(filename, O_RDONLY)))
+	{
+		DPRINTF(E_WARN, L_SCANNER, "Could not create file handle\n");
+		return -1;
+	}
+
+	len = 12;
+	if(!(len = read(fd, hdr, len)) || (len != 12))
+	{
+		DPRINTF(E_WARN, L_SCANNER, "Could not read wav header from %s\n", filename);
+		close(fd);
+		return -1;
+	}
+
+	/* I've found some wav files that have INFO tags
+	 * in them... */
+	if(strncmp((char*)hdr + 0, "RIFF", 4) ||
+	   strncmp((char*)hdr + 8, "WAVE", 4))
+	{
+		DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename);
+		close(fd);
+		return -1;
+	}
+
+	chunk_data_length = GET_WAV_INT32(hdr + 4);
+
+	/* now, walk through the chunks */
+	current_offset = 12;
+	while(!found_fmt && !found_data)
+	{
+		len = 8;
+		if(!(len = read(fd, hdr, len)) || (len != 8))
+		{
+			close(fd);
+			DPRINTF(E_WARN, L_SCANNER, "Error reading block: %s\n", filename);
+			return -1;
+		}
+
+		block_len = GET_WAV_INT32(hdr + 4);
+
+		//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Read block %02x%02x%02x%02x (%c%c%c%c) of "
+		//        "size %08x\n",hdr[0],hdr[1],hdr[2],hdr[3],
+		//        hdr[0],hdr[1],hdr[2],hdr[3],block_len);
+
+		if(block_len < 0)
+		{
+			close(fd);
+			DPRINTF(E_WARN, L_SCANNER, "Bad block len: %s\n", filename);
+			return -1;
+		}
+
+		if(strncmp((char*)&hdr, "fmt ", 4) == 0)
+		{
+			found_fmt = 1;
+			//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'fmt ' header\n");
+			len = 16;
+			if(!read(fd, fmt, len) || (len != 16))
+			{
+				close(fd);
+				DPRINTF(E_WARN, L_SCANNER, "Bad .wav file: can't read fmt: %s\n",
+					filename);
+				return -1;
+			}
+
+			format_data_length = block_len;
+			compression_code = GET_WAV_INT16(fmt);
+			channel_count = GET_WAV_INT16(fmt + 2);
+			sample_rate = GET_WAV_INT32(fmt + 4);
+			sample_bit_length = GET_WAV_INT16(fmt + 14);
+			//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Compression code: %d\n",compression_code);
+			//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Channel count:    %d\n",channel_count);
+			//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample Rate:      %d\n",sample_rate);
+			//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample bit length %d\n",sample_bit_length);
+
+		}
+		else if(strncmp((char*)&hdr, "data", 4) == 0)
+		{
+			//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'data' header\n");
+			data_length = block_len;
+			found_data = 1;
+		}
+
+		lseek(fd, current_offset + block_len + 8, SEEK_SET);
+		current_offset += block_len;
+	}
+	close(fd);
+
+	if(((format_data_length != 16) && (format_data_length != 18)) ||
+	   (compression_code != 1) ||
+	   (channel_count < 1))
+	{
+		DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename);
+		return -1;
+	}
+
+	if( !data_length )
+		data_length = psong->file_size - 44;
+
+	bit_rate = sample_rate * channel_count * ((sample_bit_length + 7) / 8) * 8;
+	psong->bitrate = bit_rate;
+	psong->samplerate = sample_rate;
+	psong->channels = channel_count;
+	//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Data length: %d\n", data_length);
+	sec = data_length / (bit_rate / 8);
+	ms = ((data_length % (bit_rate / 8)) * 1000) / (bit_rate / 8);
+	psong->song_length = (sec * 1000) + ms;
+	//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Song length: %d\n", psong->song_length);
+	//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Bit rate: %d\n", psong->bitrate);
+
+	asprintf(&(psong->mime), "audio/L16;rate=%d;channels=%d", psong->samplerate, psong->channels);
+	return 0;
+}
+
+static int
+_get_wavfileinfo(char *filename, struct song_metadata *psong)
+{
+	psong->lossless = 1;
+	asprintf(&(psong->dlna_pn), "LPCM");
+
+	return 0;
+}
diff --git a/tagutils/tagutils-wav.h b/tagutils/tagutils-wav.h
new file mode 100644
index 0000000..fc8ce97
--- /dev/null
+++ b/tagutils/tagutils-wav.h
@@ -0,0 +1,24 @@
+//=========================================================================
+// FILENAME	: tagutils-wav.h
+// DESCRIPTION	: WAV metadata reader
+//=========================================================================
+// Copyright (c) 2009- NETGEAR, Inc. All Rights Reserved.
+//=========================================================================
+
+/* 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
+ */
+
+static int _get_wavfileinfo(char *file, struct song_metadata *psong);
+static int _get_wavtags(char *file, struct song_metadata *psong);