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authorPavel Rojtberg <rojtberg@gmail.com>2022-04-05 18:06:43 +0200
committerPavel Rojtberg <rojtberg@gmail.com>2022-04-05 18:06:43 +0200
commitd0221587e9d332c522f7ac429781d4ccaa7f5ce9 (patch)
treeb276e7ce259e30043bd82aed26e2b697f44ee958 /app/src/main
parent47cd98ef2b6c9cbe17b64da67221f3238818a384 (diff)
downloaddsub-d0221587e9d332c522f7ac429781d4ccaa7f5ce9.tar.gz
dsub-d0221587e9d332c522f7ac429781d4ccaa7f5ce9.tar.bz2
dsub-d0221587e9d332c522f7ac429781d4ccaa7f5ce9.zip
sync bastp to upstream/ vanilla-music
Diffstat (limited to 'app/src/main')
-rw-r--r--app/src/main/java/github/daneren2005/dsub/service/DownloadService.java16
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/Bastp.java47
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/BastpUtil.java126
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/Common.java151
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/FlacFile.java92
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/ID3v2File.java291
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java107
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/Mp4File.java254
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/OggFile.java97
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/OpusFile.java127
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/PageInfo.java16
-rw-r--r--app/src/main/java/github/daneren2005/dsub/util/tags/RawFile.java35
12 files changed, 1099 insertions, 260 deletions
diff --git a/app/src/main/java/github/daneren2005/dsub/service/DownloadService.java b/app/src/main/java/github/daneren2005/dsub/service/DownloadService.java
index 67a0f36f..dbc1eacc 100644
--- a/app/src/main/java/github/daneren2005/dsub/service/DownloadService.java
+++ b/app/src/main/java/github/daneren2005/dsub/service/DownloadService.java
@@ -192,6 +192,11 @@ public class DownloadService extends Service {
private long subtractNextPosition = 0;
private int subtractPosition = 0;
+ /**
+ * Reference to precreated BASTP Object
+ */
+ private BastpUtil mBastpUtil;
+
@Override
public void onCreate() {
super.onCreate();
@@ -201,6 +206,7 @@ public class DownloadService extends Service {
public void run() {
Looper.prepare();
+ mBastpUtil = new BastpUtil();
mediaPlayer = new MediaPlayer();
mediaPlayer.setWakeMode(DownloadService.this, PowerManager.PARTIAL_WAKE_LOCK);
@@ -2645,7 +2651,7 @@ public class DownloadService extends Service {
try {
float adjust = 0f;
if (prefs.getBoolean(Constants.PREFERENCES_KEY_REPLAY_GAIN, false)) {
- float[] rg = BastpUtil.getReplayGainValues(downloadFile.getFile().getCanonicalPath()); /* track, album */
+ BastpUtil.GainValues rg = mBastpUtil.getReplayGainValues(downloadFile.getFile().getCanonicalPath()); /* track, album */
boolean singleAlbum = false;
String replayGainType = prefs.getString(Constants.PREFERENCES_KEY_REPLAY_GAIN_TYPE, "1");
@@ -2690,14 +2696,14 @@ public class DownloadService extends Service {
// If playing a single album or no track gain, use album gain
- if((singleAlbum || rg[0] == 0) && rg[1] != 0) {
- adjust = rg[1];
+ if((singleAlbum || rg.album == 0) && rg.track != 0) {
+ adjust = rg.album;
} else {
// Otherwise, give priority to track gain
- adjust = rg[0];
+ adjust = rg.track;
}
- if (adjust == 0) {
+ if (!rg.found) {
/* No RG value found: decrease volume for untagged song if requested by user */
int untagged = Integer.parseInt(prefs.getString(Constants.PREFERENCES_KEY_REPLAY_GAIN_UNTAGGED, "0"));
adjust = (untagged - 150) / 10f;
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/Bastp.java b/app/src/main/java/github/daneren2005/dsub/util/tags/Bastp.java
index aa0a2e25..dd456039 100644
--- a/app/src/main/java/github/daneren2005/dsub/util/tags/Bastp.java
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/Bastp.java
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
+ * Copyright (C) 2017 Google Inc.
*
* 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
@@ -24,10 +25,10 @@ import java.util.HashMap;
public class Bastp {
-
+
public Bastp() {
}
-
+
public HashMap getTags(String fname) {
HashMap tags = new HashMap();
try {
@@ -44,31 +45,61 @@ public class Bastp {
public HashMap getTags(RandomAccessFile s) {
HashMap tags = new HashMap();
- byte[] file_ff = new byte[4];
+ byte[] file_ff = new byte[12];
try {
s.read(file_ff);
String magic = new String(file_ff);
- if(magic.equals("fLaC")) {
+ if(magic.substring(0,4).equals("fLaC")) {
tags = (new FlacFile()).getTags(s);
+ tags.put("type", "FLAC");
}
- else if(magic.equals("OggS")) {
- tags = (new OggFile()).getTags(s);
+ else if(magic.substring(0,4).equals("OggS")) {
+ // This may be an Opus OR an Ogg Vorbis file
+ tags = (new OpusFile()).getTags(s);
+ if (tags.size() > 0) {
+ tags.put("type", "OPUS");
+ } else {
+ tags = (new OggFile()).getTags(s);
+ tags.put("type", "OGG");
+ }
}
else if(file_ff[0] == -1 && file_ff[1] == -5) { /* aka 0xfffb in real languages */
tags = (new LameHeader()).getTags(s);
+ tags.put("type", "MP3/Lame");
}
else if(magic.substring(0,3).equals("ID3")) {
tags = (new ID3v2File()).getTags(s);
if(tags.containsKey("_hdrlen")) {
Long hlen = Long.parseLong( tags.get("_hdrlen").toString(), 10 );
HashMap lameInfo = (new LameHeader()).parseLameHeader(s, hlen);
- /* add gain tags if not already present */
+ /* add tags from lame header if not already present */
inheritTag("REPLAYGAIN_TRACK_GAIN", lameInfo, tags);
inheritTag("REPLAYGAIN_ALBUM_GAIN", lameInfo, tags);
+ inheritTag("duration", lameInfo, tags);
}
+ tags.put("type", "MP3/ID3v2");
}
- tags.put("_magic", magic);
+ else if(magic.substring(4,8).equals("ftyp") && (
+ // see http://www.ftyps.com/ for all MP4 subtypes
+ magic.substring(8,11).equals("M4A") || // Apple audio
+ magic.substring(8,11).equals("M4V") || // Apple video
+ magic.substring(8,12).equals("mp42") || // generic MP4, e.g. FAAC
+ magic.substring(8,12).equals("isom") || // generic MP4, e.g. ffmpeg
+ magic.substring(8,12).equals("dash") // IEC 23009-1 data
+ )) {
+ tags = (new Mp4File()).getTags(s);
+ tags.put("type", "MP4");
+ }
+ else if(magic.substring(0,4).equals("MThd")) {
+ tags = (new RawFile()).getTags(s);
+ tags.put("type", "MIDI");
+ }
+ else if(file_ff[0] == -1 && (file_ff[1]&0xF0) == 0xF0) { /* aka 0xfff? */
+ tags = (new RawFile()).getTags(s);
+ tags.put("type", "ADTS");
+ }
+
}
catch (IOException e) {
}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/BastpUtil.java b/app/src/main/java/github/daneren2005/dsub/util/tags/BastpUtil.java
index 7ff517fd..802aa5ad 100644
--- a/app/src/main/java/github/daneren2005/dsub/util/tags/BastpUtil.java
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/BastpUtil.java
@@ -1,5 +1,5 @@
/*
- * Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
+ * Copyright (C) 2013-2019 Adrian Ulrich <adrian@blinkenlights.ch>
*
* 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
@@ -14,59 +14,115 @@
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
-
+
package github.daneren2005.dsub.util.tags;
-import android.support.v4.util.LruCache;
+import android.util.LruCache;
+import java.util.ArrayList;
import java.util.HashMap;
-import java.util.Vector;
-public final class BastpUtil {
- private static final RGLruCache rgCache = new RGLruCache(16);
+public class BastpUtil {
+ /**
+ * Our global instance cache
+ */
+ private RGLruCache rgCache;
+ /**
+ * What we return & cache
+ */
+ public class GainValues {
+ public float album;
+ public float track;
+ public boolean found;
+ }
+ /**
+ * LRU cache for ReplayGain values
+ */
+ private class RGLruCache extends LruCache<String, GainValues> {
+ public RGLruCache(int size) {
+ super(size);
+ }
+ }
+
- /** Returns the ReplayGain values of 'path' as <track,album>
+ public BastpUtil() {
+ rgCache = new RGLruCache(64);
+ }
+
+ /**
+ * Returns a GainValues object for `path'
*/
- public static float[] getReplayGainValues(String path) {
- float[] cached = rgCache.get(path);
+ public GainValues getReplayGainValues(String path) {
+ if(path == null) {
+ // path must not be null
+ path = "//null\\";
+ }
+ GainValues cached = rgCache.get(path);
if(cached == null) {
cached = getReplayGainValuesFromFile(path);
rgCache.put(path, cached);
}
return cached;
}
-
-
-
- /** Parse given file and return track,album replay gain values
+
+ /**
+ * Parse given file and return track,album replay gain values
*/
- private static float[] getReplayGainValuesFromFile(String path) {
- String[] keys = { "REPLAYGAIN_TRACK_GAIN", "REPLAYGAIN_ALBUM_GAIN" };
- float[] adjust= { 0f , 0f };
+ private GainValues getReplayGainValuesFromFile(String path) {
HashMap tags = (new Bastp()).getTags(path);
-
- for (int i=0; i<keys.length; i++) {
- String curKey = keys[i];
- if(tags.containsKey(curKey)) {
- String rg_raw = (String)((Vector)tags.get(curKey)).get(0);
- String rg_numonly = "";
- float rg_float = 0f;
- try {
- String nums = rg_raw.replaceAll("[^0-9.-]","");
- rg_float = Float.parseFloat(nums);
- } catch(Exception e) {}
- adjust[i] = rg_float;
+ GainValues gv = new GainValues();
+
+ // normal replay gain
+ if(tags.containsKey("REPLAYGAIN_TRACK_GAIN")) {
+ gv.track = getFloatFromString((String)((ArrayList)tags.get("REPLAYGAIN_TRACK_GAIN")).get(0));
+ gv.found = true;
+ }
+ if(tags.containsKey("REPLAYGAIN_ALBUM_GAIN")) {
+ gv.album = getFloatFromString((String)((ArrayList)tags.get("REPLAYGAIN_ALBUM_GAIN")).get(0));
+ gv.found = true;
+ }
+
+ // R128 replay gain
+ boolean r128 = false;
+ if(tags.containsKey("R128_BASTP_BASE_GAIN")) {
+ // This is the gain found in the opus header which automatically gets applied by the media framework.
+ // We therefore do not need to include it in our calculation, but we set the 'found' bit and reset
+ // both album and track gain information as an opus file should only ever contain r128 gain infos.
+ float base = getFloatFromString((String)((ArrayList)tags.get("R128_BASTP_BASE_GAIN")).get(0)) / 256.0f;
+ if (base != 0.0f) {
+ gv.track = 0;
+ gv.album = 0;
+ gv.found = true;
}
}
- return adjust;
+ if(tags.containsKey("R128_TRACK_GAIN")) {
+ gv.track += getFloatFromString((String)((ArrayList)tags.get("R128_TRACK_GAIN")).get(0)) / 256.0f;
+ gv.found = true;
+ r128 = true;
+ }
+ if(tags.containsKey("R128_ALBUM_GAIN")) {
+ gv.album += getFloatFromString((String)((ArrayList)tags.get("R128_ALBUM_GAIN")).get(0)) / 256.0f;
+ gv.found = true;
+ r128 = true;
+ }
+
+ if (r128) {
+ gv.track += 5.0f;
+ gv.album += 5.0f;
+ }
+ return gv;
}
-
- /** LRU cache for ReplayGain values
+
+ /**
+ * Parses common replayGain string values
*/
- private static class RGLruCache extends LruCache<String, float[]> {
- public RGLruCache(int size) {
- super(size);
- }
+ private float getFloatFromString(String rg_raw) {
+ float rg_float = 0f;
+ try {
+ String nums = rg_raw.replaceAll("[^0-9.-]","");
+ rg_float = Float.parseFloat(nums);
+ } catch(Exception e) {}
+ return rg_float;
}
}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/Common.java b/app/src/main/java/github/daneren2005/dsub/util/tags/Common.java
index 51344d90..c0d661f5 100644
--- a/app/src/main/java/github/daneren2005/dsub/util/tags/Common.java
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/Common.java
@@ -21,18 +21,14 @@ package github.daneren2005.dsub.util.tags;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.HashMap;
-import java.util.Vector;
+import java.util.ArrayList;
public class Common {
- private static final long MAX_PKT_SIZE = 524288;
-
- public void xdie(String reason) throws IOException {
- throw new IOException(reason);
- }
-
- /*
- ** Returns a 32bit int from given byte offset in LE
- */
+ private static final int MAX_COMMENT_SIZE = 512;
+
+ /**
+ * Returns a 32bit int from given byte offset in LE
+ */
public int b2le32(byte[] b, int off) {
int r = 0;
for(int i=0; i<4; i++) {
@@ -40,7 +36,17 @@ public class Common {
}
return r;
}
-
+
+ /**
+ * Same as b2le32 but reads from a RandomAccessFile instead of a buffer
+ */
+ public int raf2le32(RandomAccessFile fh, long off) throws IOException {
+ byte[] scratch = new byte[4];
+ fh.seek(off);
+ fh.read(scratch);
+ return b2le32(scratch, 0);
+ }
+
public int b2be32(byte[] b, int off) {
return swap32(b2le32(b, off));
}
@@ -48,63 +54,102 @@ public class Common {
public int swap32(int i) {
return((i&0xff)<<24)+((i&0xff00)<<8)+((i&0xff0000)>>8)+((i>>24)&0xff);
}
-
- /*
- ** convert 'byte' value into unsigned int
- */
+
+ /**
+ * Returns a 16bit int from given byte offset in LE
+ */
+ public int b2le16(byte[] b, int off) {
+ return ( b2u(b[off]) | b2u(b[off+1]) << 8 );
+ }
+
+ /**
+ * convert 'byte' value into unsigned int
+ */
public int b2u(byte x) {
return (x & 0xFF);
}
- /*
- ** Printout debug message to STDOUT
- */
+ /**
+ * Printout debug message to STDOUT
+ */
public void debug(String s) {
System.out.println("DBUG "+s);
}
-
- public HashMap parse_vorbis_comment(RandomAccessFile s, long offset, long payload_len) throws IOException {
+
+ /**
+ * Throws an exception, killing the parser
+ */
+ public void xdie(String reason) throws IOException {
+ throw new IOException(reason);
+ }
+
+ public HashMap parse_vorbis_comment(RandomAccessFile fh, PageInfo.PageParser pp, long offset, long payload_len) throws IOException {
HashMap tags = new HashMap();
- int comments = 0; // number of found comments
- int xoff = 0; // offset within 'scratch'
- int can_read = (int)(payload_len > MAX_PKT_SIZE ? MAX_PKT_SIZE : payload_len);
- byte[] scratch = new byte[can_read];
-
- // seek to given position and slurp in the payload
- s.seek(offset);
- s.read(scratch);
-
- // skip vendor string in format: [LEN][VENDOR_STRING]
- xoff += 4 + b2le32(scratch, xoff); // 4 = LEN = 32bit int
- comments = b2le32(scratch, xoff);
- xoff += 4;
-
- // debug("comments count = "+comments);
- for(int i=0; i<comments; i++) {
-
- int clen = (int)b2le32(scratch, xoff);
- xoff += 4+clen;
-
- if(xoff > scratch.length)
- xdie("string out of bounds");
-
- String tag_raw = new String(scratch, xoff-clen, clen);
- String[] tag_vec = tag_raw.split("=",2);
- String tag_key = tag_vec[0].toUpperCase();
-
- addTagEntry(tags, tag_key, tag_vec[1]);
+ long last_byte = offset + payload_len;
+
+ // skip vendor string in format: [LEN][VENDOR_STRING] -> 4 = LEN = 32bit int
+ offset += 4 + raf2le32(fh, offset);
+
+ // we can now read the number of comments in this file, we will also
+ // adjust offset to point to the value after this 32bit int
+ int comments = raf2le32(fh, offset);
+ offset += 4;
+
+ for ( ; comments > 0; comments--) {
+ int comment_len = raf2le32(fh, offset);
+ offset += 4;
+ long can_read = last_byte - offset; // indicates the last byte of this page
+ int do_read = (int)(can_read > comment_len ? comment_len : can_read); // how much data is readable in this page
+
+ if (do_read >= 3) {
+ int bsize = (do_read > MAX_COMMENT_SIZE ? MAX_COMMENT_SIZE : do_read);
+ byte[] data = new byte[bsize];
+ fh.seek(offset);
+ fh.read(data);
+ String tag_raw = new String(data);
+ String[] tag_vec = tag_raw.split("=", 2);
+ String tag_key = tag_vec[0].toUpperCase();
+ addTagEntry(tags, tag_key, tag_vec[1]);
+ }
+
+ // set offset to begin of next tag (OR the end of this page!)
+ offset += do_read;
+
+ // We hit the end of a stream
+ // this is most likely due to the fact that we cropped do_read to not cross
+ // the page boundary -> we must now calculate the position of the next tag
+ if (offset == last_byte) {
+ int partial_cruft = comment_len - do_read; // how many bytes we did not read
+ while(partial_cruft > 0) {
+ PageInfo pi = pp.parse_stream_page(fh, last_byte);
+ if (pi.header_len <1 || pi.payload_len < 1)
+ xdie("Data from callback doesnt make much sense");
+
+ offset += pi.header_len; // move position behind page header
+ last_byte = offset + pi.payload_len; // and adjust the last byte to pos + payload_size
+
+ if (offset+partial_cruft < last_byte) {
+ offset += partial_cruft; // partial data ends in this block: just adjust the ofset
+ break;
+ } else {
+ // this page just contains data from the partial tag -> skip to next one
+ offset = last_byte;
+ partial_cruft -= pi.payload_len;
+ }
+ }
+ }
}
return tags;
}
-
+
public void addTagEntry(HashMap tags, String key, String value) {
if(tags.containsKey(key)) {
- ((Vector)tags.get(key)).add(value); // just add to existing vector
+ ((ArrayList)tags.get(key)).add(value); // just add to existing vector
}
else {
- Vector vx = new Vector();
- vx.add(value);
- tags.put(key, vx);
+ ArrayList l = new ArrayList<String>();
+ l.add(value);
+ tags.put(key, l);
}
}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/FlacFile.java b/app/src/main/java/github/daneren2005/dsub/util/tags/FlacFile.java
index de3584d1..ce508d2e 100644
--- a/app/src/main/java/github/daneren2005/dsub/util/tags/FlacFile.java
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/FlacFile.java
@@ -23,7 +23,8 @@ import java.util.HashMap;
import java.util.Enumeration;
-public class FlacFile extends Common {
+public class FlacFile extends Common implements PageInfo.PageParser {
+ private static final int FLAC_TYPE_STREAMINFO = 0; // Basic info about the stream
private static final int FLAC_TYPE_COMMENT = 4; // ID of 'VorbisComment's
public FlacFile() {
@@ -32,54 +33,87 @@ public class FlacFile extends Common {
public HashMap getTags(RandomAccessFile s) throws IOException {
int xoff = 4; // skip file magic
int retry = 64;
- int r[];
+ boolean need_infos = true;
+ boolean need_tags = true;
+ HashMap infos = new HashMap();
HashMap tags = new HashMap();
-
+
for(; retry > 0; retry--) {
- r = parse_metadata_block(s, xoff);
-
- if(r[2] == FLAC_TYPE_COMMENT) {
- tags = parse_vorbis_comment(s, xoff+r[0], r[1]);
- break;
+ PageInfo pi = parse_stream_page(s, xoff);
+ if(pi.type == FLAC_TYPE_STREAMINFO) {
+ infos = parse_streaminfo_block(s, xoff+pi.header_len, pi.payload_len);
+ need_infos = false;
+ }
+ if(pi.type == FLAC_TYPE_COMMENT) {
+ tags = parse_vorbis_comment(s, this, xoff+pi.header_len, pi.payload_len);
+ need_tags = false;
}
-
- if(r[3] != 0)
+
+ if(pi.last_page == true || (need_tags == false && need_infos == false))
break; // eof reached
-
+
// else: calculate next offset
- xoff += r[0] + r[1];
+ xoff += pi.header_len + pi.payload_len;
+ }
+
+ // Copy duration to final hashmap if found in infoblock
+ if(infos.containsKey("duration")) {
+ tags.put("duration", infos.get("duration"));
}
+
return tags;
}
- /* Parses the metadata block at 'offset' and returns
- ** [header_size, payload_size, type, stop_after]
- */
- private int[] parse_metadata_block(RandomAccessFile s, long offset) throws IOException {
- int[] result = new int[4];
+ /**
+ * Parses the metadata block at 'offset'
+ */
+ public PageInfo parse_stream_page(RandomAccessFile s, long offset) throws IOException {
byte[] mb_head = new byte[4];
int stop_after = 0;
int block_type = 0;
int block_size = 0;
-
+
s.seek(offset);
if( s.read(mb_head) != 4 )
xdie("failed to read metadata block header");
-
+
block_size = b2be32(mb_head,0); // read whole header as 32 big endian
block_type = (block_size >> 24) & 127; // BIT 1-7 are the type
stop_after = (((block_size >> 24) & 128) > 0 ? 1 : 0 ); // BIT 0 indicates the last-block flag
block_size = (block_size & 0x00FFFFFF); // byte 1-7 are the size
-
- // debug("size="+block_size+", type="+block_type+", is_last="+stop_after);
-
- result[0] = 4; // hardcoded - only returned to be consistent with OGG parser
- result[1] = block_size;
- result[2] = block_type;
- result[3] = stop_after;
-
- return result;
+
+ PageInfo pi = new PageInfo();
+ pi.header_len = 4; // fixed size in flac
+ pi.payload_len = block_size;
+ pi.type = block_type;
+ pi.last_page = (stop_after != 0);
+ return pi;
}
-
+
+ /*
+ ** Returns a hashma with parsed vorbis identification header data
+ **/
+ private HashMap parse_streaminfo_block(RandomAccessFile s, long offset, long pl_len) throws IOException {
+ HashMap id_hash = new HashMap();
+ byte[] buff = new byte[18];
+
+ if(pl_len >= buff.length) {
+ s.seek(offset);
+ s.read(buff);
+ id_hash.put("blocksize_minimal", (b2be32(buff, 0) >> 16));
+ id_hash.put("blocksize_maximal", (b2be32(buff, 0) & 0x0000FFFF));
+ id_hash.put("framesize_minimal", (b2be32(buff, 4) >> 8));
+ id_hash.put("framesize_maximal", (b2be32(buff, 7) >> 8));
+ id_hash.put("sampling_rate", (b2be32(buff, 10) >> 12));
+ id_hash.put("channels", ((b2be32(buff, 10) >> 9) & 7) + 1); // 3 bits
+ id_hash.put("num_samples", b2be32(buff, 14)); // fixme: this is actually 36 bit: the 4 hi bits are discarded due to java
+ if((Integer)id_hash.get("sampling_rate") > 0) {
+ int duration = (Integer)id_hash.get("num_samples") / (Integer)id_hash.get("sampling_rate");
+ id_hash.put("duration", (int)duration);
+ }
+ }
+ return id_hash;
+ }
+
}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/ID3v2File.java b/app/src/main/java/github/daneren2005/dsub/util/tags/ID3v2File.java
index 69668475..4fb7418d 100644
--- a/app/src/main/java/github/daneren2005/dsub/util/tags/ID3v2File.java
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/ID3v2File.java
@@ -1,5 +1,6 @@
/*
- * Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
+ * Copyright (C) 2013-2016 Adrian Ulrich <adrian@blinkenlights.ch>
+ * Copyright (C) 2017-2018 Google Inc.
*
* 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
@@ -12,7 +13,7 @@
* 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, see <http://www.gnu.org/licenses/>.
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package github.daneren2005.dsub.util.tags;
@@ -21,160 +22,246 @@ import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.ArrayList;
import java.util.HashMap;
-import java.util.Locale;
+import java.util.Enumeration;
+
public class ID3v2File extends Common {
- private static int ID3_ENC_LATIN = 0x00;
- private static int ID3_ENC_UTF16LE = 0x01;
- private static int ID3_ENC_UTF16BE = 0x02;
- private static int ID3_ENC_UTF8 = 0x03;
-
+ private static final int ID3_ENC_LATIN = 0x00;
+ private static final int ID3_ENC_UTF16 = 0x01;
+ private static final int ID3_ENC_UTF16BE = 0x02;
+ private static final int ID3_ENC_UTF8 = 0x03;
+ private static final HashMap<String, String> sOggNames;
+ static {
+ // ID3v2.3 -> ogg mapping
+ sOggNames = new HashMap<String, String>();
+ sOggNames.put("TIT2", "TITLE");
+ sOggNames.put("TALB", "ALBUM");
+ sOggNames.put("TPE1", "ARTIST");
+ sOggNames.put("TPE2", "ALBUMARTIST");
+ sOggNames.put("TYER", "YEAR");
+ sOggNames.put("TPOS", "DISCNUMBER");
+ sOggNames.put("TRCK", "TRACKNUMBER");
+ sOggNames.put("TCON", "GENRE");
+ sOggNames.put("TCOM", "COMPOSER");
+ // ID3v2.2 3-character names
+ sOggNames.put("TT2", "TITLE");
+ sOggNames.put("TAL", "ALBUM");
+ sOggNames.put("TP1", "ARTIST");
+ sOggNames.put("TP2", "ALBUMARTIST");
+ sOggNames.put("TYE", "YEAR");
+ sOggNames.put("TRK", "TRACKNUMBER");
+ sOggNames.put("TCO", "GENRE");
+ sOggNames.put("TCM", "COMPOSER");
+ }
+
+ // Holds a key-value pair
+ private class TagItem {
+ String key;
+ String value;
+ public TagItem(String key, String value) {
+ this.key = key;
+ this.value = value;
+ }
+ }
+
public ID3v2File() {
}
-
+
public HashMap getTags(RandomAccessFile s) throws IOException {
HashMap tags = new HashMap();
-
+
final int v2hdr_len = 10;
byte[] v2hdr = new byte[v2hdr_len];
-
+
// read the whole 10 byte header into memory
s.seek(0);
s.read(v2hdr);
-
- int id3v = ((b2be32(v2hdr,0))) & 0xFF; // swapped ID3\04 -> ver. ist the first byte
- int v3len = ((b2be32(v2hdr,6))); // total size EXCLUDING the this 10 byte header
- v3len = ((v3len & 0x7f000000) >> 3) | // for some funky reason, this is encoded as 7*4 bits
- ((v3len & 0x007f0000) >> 2) |
- ((v3len & 0x00007f00) >> 1) |
- ((v3len & 0x0000007f) >> 0) ;
-
- // debug(">> tag version ID3v2."+id3v);
- // debug(">> LEN= "+v3len+" // "+v3len);
-
+
+ int v3major = (b2be32(v2hdr, 0)) & 0xFF; // swapped ID3\04 -> ver. ist the first byte
+ int v3minor = (b2be32(v2hdr, 1)) & 0xFF; // minor version, not used by us.
+ int v3flags = (b2be32(v2hdr, 2)) & 0xFF; // flags such as extended headers.
+ int v3len = (b2be32(v2hdr, 6)); // total size EXCLUDING the this 10 byte header
+ v3len = unsyncsafe(v3len);
+
+ // In 2.4, bit #6 indicates whether or not this file has an extended header
+ boolean flag_ext_hdr = v3major >= 4 && (v3flags & (1 << 6)) != 0;
+
+ if (flag_ext_hdr) {
+ // The extended header is at least 6 bytes:
+ // * 4 byts of size
+ // * 1 byte numflags
+ // * 1 byte extended flags
+ byte[] exthdr = new byte[6];
+ long pos = s.getFilePointer();
+ s.read(exthdr);
+
+ // we got the length, so we can seek to the header end.
+ int extlen = (b2be32(exthdr, 0));
+ s.seek(pos + extlen);
+ }
+
// we should already be at the first frame
// so we can start the parsing right now
- tags = parse_v3_frames(s, v3len);
+ tags = parse_v3_frames(s, v3len, v3major);
tags.put("_hdrlen", v3len+v2hdr_len);
return tags;
}
-
+
+ /*
+ ** converts syncsafe integer to Java integer
+ */
+ private int unsyncsafe(int x) {
+ x = ((x & 0x7f000000) >> 3) |
+ ((x & 0x007f0000) >> 2) |
+ ((x & 0x00007f00) >> 1) |
+ ((x & 0x0000007f) >> 0) ;
+ return x;
+ }
+
+ /**
+ * Calculates the frame length baased on the frame size and the
+ */
+ private int calculateFrameLength(byte[] frame, int offset, int v3major) {
+ // ID3v2 (aka ID3v2.2) had a 3-byte unencoded length field.
+ if (v3major < 3) {
+ return (frame[offset] << 16) + (frame[offset+1] << 8) + frame[offset+2];
+ }
+ int rawlen = b2be32(frame, offset);
+ // Encoders prior ID3v2.4 did not encode the frame length
+ if (v3major < 4) {
+ return rawlen;
+ }
+ return unsyncsafe(rawlen);
+ }
+
/* Parses all ID3v2 frames at the current position up until payload_len
** bytes were read
*/
- public HashMap parse_v3_frames(RandomAccessFile s, long payload_len) throws IOException {
+ public HashMap parse_v3_frames(RandomAccessFile s, long payload_len, int v3major) throws IOException {
HashMap tags = new HashMap();
- byte[] frame = new byte[10]; // a frame header is always 10 bytes
- long bread = 0; // total amount of read bytes
-
+ // ID3v2 (aka ID3v2.2) had a 6-byte header of a 3-byte name and a 3-byte length.
+ // ID3v2.3 increased the header size to 10 bytes, with a 4-byte name and a 4-byte length
+ int namelen = (v3major >= 3 ? 4 : 3);
+ int headerlen = (v3major >= 3 ? 10 : 6);
+ byte[] frame = new byte[headerlen];
+ long bread = 0; // total amount of read bytes
+
while(bread < payload_len) {
bread += s.read(frame);
- String framename = new String(frame, 0, 4);
- int slen = b2be32(frame, 4);
-
+ String framename = new String(frame, 0, namelen);
+ int slen = calculateFrameLength(frame, namelen, v3major);
/* Abort on silly sizes */
- if(slen < 1 || slen > 524288)
+ long bytesRemaining = payload_len - bread;
+ if(slen < 1 || slen > bytesRemaining)
break;
-
+
byte[] xpl = new byte[slen];
bread += s.read(xpl);
if(framename.substring(0,1).equals("T")) {
- String[] nmzInfo = normalizeTaginfo(framename, xpl);
-
- for(int i = 0; i < nmzInfo.length; i += 2) {
- String oggKey = nmzInfo[i];
- String decPld = nmzInfo[i + 1];
-
- if (oggKey.length() > 0 && !tags.containsKey(oggKey)) {
- addTagEntry(tags, oggKey, decPld);
+ TagItem nti = normalizeTaginfo(framename, xpl);
+ if (nti.key.length() > 0) {
+ for (TagItem ti : splitTagPayload(nti)) {
+ addTagEntry(tags, ti.key, ti.value);
}
}
}
else if(framename.equals("RVA2")) {
//
}
-
+
}
return tags;
}
-
+
+ /* Split null-separated tags into individual elements */
+ private ArrayList<TagItem> splitTagPayload(TagItem in) {
+ ArrayList res = new ArrayList<TagItem>();
+ int i = 0;
+
+ if (sOggNames.containsValue(in.key)) {
+ // Only try to split if there are more than two chars and the string does NOT look UTF16 encoded.
+ if (in.value.length() >= 2 && in.value.charAt(0) != 0 && in.value.charAt(1) != 0) {
+ for (String item : in.value.split("\0")) {
+ if (item.length() > 0) { // do not add empty items, avoids thrashing if the string is zero padded.
+ res.add(new TagItem(in.key, item));
+ }
+ i++;
+ }
+ }
+ }
+
+ if (i == 0) {
+ res.add(in);
+ }
+ return res;
+ }
+
/* Converts ID3v2 sillyframes to OggNames */
- private String[] normalizeTaginfo(String k, byte[] v) {
- String[] rv = new String[] {"",""};
- HashMap lu = new HashMap<String, String>();
- lu.put("TIT2", "TITLE");
- lu.put("TALB", "ALBUM");
- lu.put("TPE1", "ARTIST");
-
- if(lu.containsKey(k)) {
+ private TagItem normalizeTaginfo(String k, byte[] v) {
+ TagItem ti = new TagItem("", "");
+ if(sOggNames.containsKey(k)) {
/* A normal, known key: translate into Ogg-Frame name */
- rv[0] = (String)lu.get(k);
- rv[1] = getDecodedString(v);
+ ti.key = (String)sOggNames.get(k);
+ ti.value = getDecodedString(v);
}
else if(k.equals("TXXX")) {
/* A freestyle field, ieks! */
String txData[] = getDecodedString(v).split(Character.toString('\0'), 2);
/* Check if we got replaygain info in key\0value style */
- if(txData.length == 2) {
- if(txData[0].matches("^(?i)REPLAYGAIN_(ALBUM|TRACK)_GAIN$")) {
- rv[0] = txData[0].toUpperCase(); /* some tagwriters use lowercase for this */
- rv[1] = txData[1];
- } else {
- // Check for replaygain tags just thrown randomly in field
- int nextStartIndex = 1;
- int startName = txData[1].toLowerCase(Locale.US).indexOf("replaygain_");
- ArrayList<String> parts = new ArrayList<String>();
- while(startName != -1) {
- int endName = txData[1].indexOf((char) 0, startName);
- if(endName != -1) {
- parts.add(txData[1].substring(startName, endName).toUpperCase());
- int endValue = txData[1].indexOf((char) 0, endName + 1);
- if(endValue != -1) {
- parts.add(txData[1].substring(endName + 1, endValue));
- nextStartIndex = endValue + 1;
- } else {
- break;
- }
- } else {
- break;
- }
-
- startName = txData[1].toLowerCase(Locale.US).indexOf("replaygain_", nextStartIndex);
- }
-
- if(parts.size() > 0) {
- rv = new String[parts.size()];
- rv = parts.toArray(rv);
- }
- }
+ if(txData.length == 2 && txData[0].matches("^(?i)REPLAYGAIN_(ALBUM|TRACK)_GAIN$")) {
+ ti.key = txData[0].toUpperCase(); /* some tagwriters use lowercase for this */
+ ti.value = txData[1];
}
}
-
- return rv;
+
+ return ti;
}
-
+
/* Converts a raw byte-stream text into a java String */
private String getDecodedString(byte[] raw) {
int encid = raw[0] & 0xFF;
- int len = raw.length;
- String v = "";
+ int skip = 1;
+ String cs = "ISO-8859-1";
+ String rv = "";
try {
- if(encid == ID3_ENC_LATIN) {
- v = new String(raw, 1, len-1, "ISO-8859-1");
- }
- else if (encid == ID3_ENC_UTF8) {
- v = new String(raw, 1, len-1, "UTF-8");
- }
- else if (encid == ID3_ENC_UTF16LE) {
- v = new String(raw, 3, len-3, "UTF-16LE");
+ switch (encid) {
+ case ID3_ENC_UTF8:
+ cs = "UTF-8";
+ break;
+ case ID3_ENC_UTF16BE:
+ cs = "UTF-16BE";
+ skip = 3;
+ break;
+ case ID3_ENC_UTF16:
+ cs = "UTF-16";
+ if (raw.length > 4) {
+ if ((raw[1]&0xFF) == 0xFE && (raw[2]&0XFF) == 0xFF && (raw[3]&0xFF) == 0x00 && (raw[4]&0xFF) == 0x00) {
+ // buggy tag written by lame?!
+ raw[3] = raw[2];
+ raw[4] = raw[1];
+ skip = 3;
+ } else if((raw[1]&0xFF) == 0xFF && (raw[2]&0XFF) == 0x00 && (raw[3]&0xFF) == 0xFE) {
+ // ?!, but seen in the wild
+ raw[2] = raw[1];
+ skip = 2;
+ }
+ }
+ break;
+ case ID3_ENC_LATIN:
+ default:
+ // uses defaults
}
- else if (encid == ID3_ENC_UTF16BE) {
- v = new String(raw, 3, len-3, "UTF-16BE");
+
+ rv = new String(raw, skip, raw.length-skip, cs);
+
+ if (rv.length() > 0 && rv.substring(rv.length()-1).equals("\0")) {
+ // SOME tag writers seem to null terminate strings, some don't...
+ rv = rv.substring(0, rv.length()-1);
}
} catch(Exception e) {}
- return v;
+ return rv;
}
-
+
}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java b/app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java
index 720ee87f..691c7279 100644
--- a/app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/LameHeader.java
@@ -1,5 +1,6 @@
/*
* Copyright (C) 2013 Adrian Ulrich <adrian@blinkenlights.ch>
+ * Copyright (C) 2017 Google Inc.
*
* 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
@@ -19,28 +20,122 @@ package github.daneren2005.dsub.util.tags;
import java.io.IOException;
import java.io.RandomAccessFile;
+import java.util.Arrays;
import java.util.HashMap;
import java.util.Enumeration;
public class LameHeader extends Common {
-
+
+ // Sampling rate version -> field mapping
+ private static int[][] sampleRates = {
+ { 11025, 12000, 8000 }, // MPEG2.5 (idx = 0)
+ { 0, 0, 0 }, // reserved (idx = 1)
+ { 22050, 24000, 16000 }, // MPEG2 (idx = 2)
+ { 44100, 48000, 32000 }, // MPEG1 (idx = 3)
+ };
+
+ // SamplesPerFrame layer -> version mapping
+ private static int[][] samplesPerFrame = {
+ // reserved, layer3, layer2, layer1
+ { 0, 576, 1152, 384 }, // MPEG2.5
+ { 0, 0, 0, 0 }, // RESERVED
+ { 0, 576, 1152, 384 }, // MPEG2
+ { 0, 1152, 1152, 384 }, // MPEG1
+ };
+
+
public LameHeader() {
}
public HashMap getTags(RandomAccessFile s) throws IOException {
- return parseLameHeader(s, 0);
+ HashMap rgain = parseLameHeader(s, 0);
+ HashMap tags = parseV1Header(s, s.length()-128);
+
+ // Add replay gain info to returned object if available
+ for (String k : Arrays.asList("REPLAYGAIN_TRACK_GAIN", "REPLAYGAIN_ALBUM_GAIN")) {
+ if (rgain.containsKey(k))
+ tags.put(k, rgain.get(k));
+ }
+
+ return tags;
}
-
+
+ /**
+ * Attempts to parse ID3v1(.1) information from given RandomAccessFile
+ *
+ * @param s the seekable RandomAccessFile
+ * @param offset position of the ID3v1 tag
+ */
+ private HashMap parseV1Header(RandomAccessFile s, long offset) throws IOException {
+ HashMap tags = new HashMap();
+ byte[] tag = new byte[3];
+ byte[] year = new byte[4];
+ byte[] str = new byte[30];
+
+ s.seek(offset);
+ s.read(tag);
+
+ if("TAG".equals(new String(tag))) {
+ for (String name : Arrays.asList("TITLE", "ARTIST", "ALBUM")) {
+ s.read(str);
+ String value = new String(str, "ISO-8859-1").trim();
+ if (value.length() > 0)
+ addTagEntry(tags, name, value);
+ }
+
+ // year is a string for whatever reason...
+ s.read(year);
+ String y = new String(year).trim();
+ if (y.length() > 0)
+ addTagEntry(tags, "YEAR", y);
+
+ s.skipBytes(28); // skip comment field
+ s.read(tag);
+
+ if (tag[0] == 0 && tag[1] != 0) // tag[0] == 0 -> is id3v1.1 compatible
+ addTagEntry(tags, "TRACKNUMBER", String.format("%d", tag[1]));
+
+ if (tag[2] != 0)
+ addTagEntry(tags, "GENRE", String.format("%d", tag[2]));
+ }
+
+
+ return tags;
+ }
+
public HashMap parseLameHeader(RandomAccessFile s, long offset) throws IOException {
HashMap tags = new HashMap();
- byte[] chunk = new byte[4];
+ byte[] chunk = new byte[12];
s.seek(offset + 0x24);
s.read(chunk);
- String lameMark = new String(chunk, 0, chunk.length, "ISO-8859-1");
-
+ String lameMark = new String(chunk, 0, 4, "ISO-8859-1");
+ int flags = b2u(chunk[7]);
+
+ if((flags & 0x01) !=0 ) { // header indicates that totalFrames field is present
+ int total_frames = b2be32(chunk, 8);
+ s.seek(offset);
+ s.read(chunk);
+
+ int mpeg_hdr = b2be32(chunk, 0);
+ int srate_idx = (mpeg_hdr >> 10) & 3; // sampling rate index at bit 10-11
+ int layer_idx = (mpeg_hdr >> 17) & 3; // layer index value bit 17-18
+ int ver_idx = (mpeg_hdr >> 19) & 3; // version index value bit 19-20
+
+ // Try to calculate song duration if all indexes are sane
+ if (ver_idx < sampleRates.length && srate_idx < sampleRates[ver_idx].length && layer_idx < samplesPerFrame[ver_idx].length) {
+ int sample_rate = sampleRates[ver_idx][srate_idx];
+ int sample_pfr = samplesPerFrame[ver_idx][layer_idx];
+ if (sample_rate > 0 && sample_pfr > 0) {
+ double duration = ((double)sample_pfr / (double)sample_rate) * total_frames;
+ tags.put("duration", (int)duration);
+ }
+ }
+
+ }
+
if(lameMark.equals("Info") || lameMark.equals("Xing")) {
s.seek(offset+0xAB);
s.read(chunk);
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/Mp4File.java b/app/src/main/java/github/daneren2005/dsub/util/tags/Mp4File.java
new file mode 100644
index 00000000..db00bf6a
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/Mp4File.java
@@ -0,0 +1,254 @@
+/*
+ * Copyright (C) 2016 Ian Harmon
+ * Copyright (C) 2017 Google Inc.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+package github.daneren2005.dsub.util.tags;
+
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Stack;
+
+/*
+* Helper class for tracking the traversal of the atom tree
+*/
+class Atom {
+ String name;
+ long start;
+ int length;
+
+ public Atom(String name, long start, int length) {
+ this.name = name;
+ this.start = start;
+ this.length = length;
+ }
+}
+
+/*
+* MP4 tag parser
+*/
+public class Mp4File extends Common {
+
+ // only these tags are returned. others may be parsed, but discarded.
+ final static List<String> ALLOWED_TAGS = Arrays.asList(
+ "replaygain_track_gain",
+ "replaygain_album_gain",
+ "title",
+ "album",
+ "artist",
+ "albumartist",
+ "composer",
+ "genre",
+ "year",
+ "tracknumber",
+ "discnumber"
+ );
+
+ // mapping between atom <-> vorbis tags
+ final static HashMap<String, String> ATOM_TAGS;
+ static {
+ ATOM_TAGS = new HashMap<String, String>();
+ ATOM_TAGS.put("�nam", "title");
+ ATOM_TAGS.put("�alb", "album");
+ ATOM_TAGS.put("�ART", "artist");
+ ATOM_TAGS.put("aART", "albumartist");
+ ATOM_TAGS.put("�wrt", "composer");
+ ATOM_TAGS.put("�gen", "genre");
+ ATOM_TAGS.put("�day", "year");
+ ATOM_TAGS.put("trkn", "tracknumber");
+ ATOM_TAGS.put("disk", "discnumber");
+ }
+
+ // These tags are 32bit integers, not strings.
+ final static List<String> BINARY_TAGS = Arrays.asList(
+ "tracknumber",
+ "discnumber"
+ );
+
+ // maximum size for tag names or values
+ final static int MAX_BUFFER_SIZE = 512;
+ // only used when developing
+ final static boolean PRINT_DEBUG = false;
+
+ // When processing atoms, we first read the atom length (4 bytes),
+ // and then the atom name (also 4 bytes). This value should not be changed.
+ final static int ATOM_HEADER_SIZE = 8;
+
+ /*
+ * Traverses the atom structure of an MP4 file and returns as soon as tags
+ * are parsed
+ */
+ public HashMap getTags(RandomAccessFile s) throws IOException {
+ HashMap tags = new HashMap();
+ if (PRINT_DEBUG) { System.out.println(); }
+ try {
+
+ // maintain a trail of breadcrumbs to know what part of the file we're in,
+ // so e.g. that we only parse [name] atoms that are part of a tag
+ Stack<Atom> path = new Stack<Atom>();
+
+ s.seek(0);
+ int atomSize;
+ byte[] atomNameRaw = new byte[4];
+ String atomName;
+ String tagName = null;
+
+ // begin traversing the file
+ // file structure info from http://atomicparsley.sourceforge.net/mpeg-4files.html
+ while (s.getFilePointer() < s.length()) {
+
+ // if we've read/skipped past the end of atoms, remove them from the path stack
+ while (!path.empty() && s.getFilePointer() >= (path.peek().start + path.peek().length)) {
+ // if we've finished the tag atom [ilst], we can stop parsing.
+ // when tags are read successfully, this should be the exit point for the parser.
+ if (path.peek().name.equals("ilst")) {
+ if (PRINT_DEBUG) { System.out.println(); }
+ return tags;
+ }
+ path.pop();
+ }
+
+ // read a new atom's details
+ atomSize = s.readInt();
+
+ // return if we're unable to parse an atom size
+ // (e.g. previous atoms were parsed incorrectly and the
+ // file pointer is misaligned)
+ if (atomSize <= 0) { return tags; }
+
+ s.read(atomNameRaw);
+ atomName = new String(atomNameRaw);
+
+ // determine if we're currently decending through the hierarchy
+ // to a tag atom
+ boolean approachingTagAtom = false;
+ boolean onMetaAtom = false;
+ boolean onTagAtom = false;
+ String fourAtom = null;
+ // compare everything in the current path hierarchy and the new atom as well
+ // this is a bit repetitive as-is, but shouldn't be noticeable
+ for (int i = 0; i <= path.size(); i++) {
+ String thisAtomName = (i < path.size()) ? path.get(i).name : atomName;
+ if ((i == 0 && thisAtomName.equals("moov")) ||
+ (i == 1 && thisAtomName.equals("udta")) ||
+ (i == 2 && thisAtomName.equals("meta")) ||
+ (i == 3 && thisAtomName.equals("ilst")) ||
+ (i == 4 && thisAtomName.equals("----")) ||
+ (i == 4 && ATOM_TAGS.containsKey(thisAtomName)) ||
+ (i == 5 && (thisAtomName.equals("name") || thisAtomName.equals("data")))
+ ) {
+ approachingTagAtom = true;
+ // if we're at the end of the current hierarchy, mark if it's the [meta] or a tag atom.
+ if (i == path.size()) {
+ onMetaAtom = thisAtomName.equals("meta");
+ onTagAtom = (thisAtomName.equals("name") || thisAtomName.equals("data"));
+ }
+ // depth is 4 and this is a known atom: rembemer this!
+ if (i == 4 && ATOM_TAGS.containsKey(thisAtomName)) {
+ fourAtom = ATOM_TAGS.get(thisAtomName);
+ }
+ }
+ // quit as soon as we know we're not on the road to a tag atom
+ else {
+ approachingTagAtom = false;
+ break;
+ }
+ }
+
+ // add the new atom to the path hierarchy
+ path.push(new Atom(atomName, s.getFilePointer()-ATOM_HEADER_SIZE, atomSize));
+ if (PRINT_DEBUG) { printDebugAtomPath(s, path, atomName, atomSize); }
+
+ // skip all non-pertinent atoms
+ if (!approachingTagAtom) { s.skipBytes(atomSize-ATOM_HEADER_SIZE); }
+ // dive into tag-related ones
+ else {
+ // the meta atom has an extra 4 bytes that need to be skipped
+ if (onMetaAtom) { s.skipBytes(4); }
+
+ // read tag contents when there
+ if (onTagAtom) {
+ // get a tag name
+ if (atomName.equals("name")) {
+ // skip null bytes
+ s.skipBytes(4);
+ tagName = new String(readIntoBuffer(s, atomSize-(ATOM_HEADER_SIZE+4)));
+ }
+
+ // get a tag value
+ else if (atomName.equals("data")) {
+ // skip flags/null bytes
+ s.skipBytes(8);
+
+ // use the 'fourAtom' value if we did not have a tag name
+ tagName = (tagName == null ? fourAtom : tagName);
+ // read the tag
+ byte[] tagBuffer = readIntoBuffer(s, atomSize-(ATOM_HEADER_SIZE+8));
+
+ if (ALLOWED_TAGS.contains(tagName))
+ {
+ String tagValue = (BINARY_TAGS.contains(tagName) ? String.format("%d", b2be32(tagBuffer, 0)) : new String(tagBuffer, "UTF-8"));
+ if (PRINT_DEBUG) {
+ System.out.println(String.format("parsed tag '%s': '%s'\n", tagName, tagValue));
+ }
+ addTagEntry(tags, tagName.toUpperCase(), tagValue);
+ }
+ // This is the end of this tree, make sure that we don't re-use tagName in any other tree
+ tagName = null;
+ }
+ }
+ }
+ }
+ // End of while loop, the file has been completely read through.
+ // The parser should only return here if the tags atom [ilst] was missing.
+ return tags;
+ }
+ // if anything goes wrong, just return whatever we already have
+ catch (Exception e) {
+ return tags;
+ }
+ }
+
+ /*
+ * Reads bytes from an atom up to the buffer size limit, currently 512B
+ */
+ private byte[] readIntoBuffer(RandomAccessFile s, int dataSize) throws IOException {
+ // read tag up to buffer limit
+ int bufferSize = Math.min(dataSize, MAX_BUFFER_SIZE);
+ byte[] buffer = new byte[bufferSize];
+ s.read(buffer, 0, buffer.length);
+ if (dataSize > bufferSize) {
+ s.skipBytes(dataSize - bufferSize);
+ }
+ return buffer;
+ }
+
+ /*
+ * Can be used when traversing the atom hierarchy to print the tree of atoms
+ */
+ private void printDebugAtomPath(RandomAccessFile s, Stack<Atom> path,
+ String atomName, int atomSize) throws IOException
+ {
+ String treeLines = "";
+ for (int i = 0; i < path.size(); i++) { treeLines += ". "; }
+ long atomStart = s.getFilePointer()-ATOM_HEADER_SIZE;
+ System.out.println(String.format("%-22s %8d to %8d, length %8d",
+ (treeLines + "[" + atomName + "]"), atomStart, (atomStart+atomSize), atomSize));
+ }
+}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/OggFile.java b/app/src/main/java/github/daneren2005/dsub/util/tags/OggFile.java
index d0b31671..0383c68a 100644
--- a/app/src/main/java/github/daneren2005/dsub/util/tags/OggFile.java
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/OggFile.java
@@ -23,10 +23,11 @@ import java.io.RandomAccessFile;
import java.util.HashMap;
-public class OggFile extends Common {
+public class OggFile extends Common implements PageInfo.PageParser {
- private static final int OGG_PAGE_SIZE = 27; // Static size of an OGG Page
- private static final int OGG_TYPE_COMMENT = 3; // ID of 'VorbisComment's
+ private static final int OGG_PAGE_SIZE = 27; // Static size of an OGG Page
+ private static final int OGG_TYPE_IDENTIFICATION = 1; // Identification header
+ private static final int OGG_TYPE_COMMENT = 3; // ID of 'VorbisComment's
public OggFile() {
}
@@ -34,24 +35,46 @@ public class OggFile extends Common {
public HashMap getTags(RandomAccessFile s) throws IOException {
long offset = 0;
int retry = 64;
+ boolean need_tags = true;
+ boolean need_id = true;
+
HashMap tags = new HashMap();
+ HashMap identification = new HashMap();
for( ; retry > 0 ; retry-- ) {
- long res[] = parse_ogg_page(s, offset);
- if(res[2] == OGG_TYPE_COMMENT) {
- tags = parse_ogg_vorbis_comment(s, offset+res[0], res[1]);
+ PageInfo pi = parse_stream_page(s, offset);
+ if(pi.type == OGG_TYPE_IDENTIFICATION) {
+ identification = parse_ogg_vorbis_identification(s, offset+pi.header_len, pi.payload_len);
+ need_id = false;
+ } else if(pi.type == OGG_TYPE_COMMENT) {
+ tags = parse_ogg_vorbis_comment(s, offset+pi.header_len, pi.payload_len);
+ need_tags = false;
+ }
+ offset += pi.header_len + pi.payload_len;
+ if (need_tags == false && need_id == false) {
break;
}
- offset += res[0] + res[1];
}
+
+ // Calculate duration in seconds
+ // Note that this calculation is WRONG: We would have to get the last
+ // packet to calculate the real length - but this is goot enough.
+ if (identification.containsKey("bitrate_nominal")) {
+ int br_nom = (Integer)identification.get("bitrate_nominal") / 8;
+ long file_length = s.length();
+ if (file_length > 0 && br_nom > 0) {
+ tags.put("duration", (int)(file_length/br_nom));
+ }
+ }
+
return tags;
}
- /* Parses the ogg page at offset 'offset' and returns
- ** [header_size, payload_size, type]
- */
- private long[] parse_ogg_page(RandomAccessFile s, long offset) throws IOException {
+ /**
+ * Parses the ogg page at offset 'offset'
+ */
+ public PageInfo parse_stream_page(RandomAccessFile s, long offset) throws IOException {
long[] result = new long[3]; // [header_size, payload_size]
byte[] p_header = new byte[OGG_PAGE_SIZE]; // buffer for the page header
byte[] scratch;
@@ -78,18 +101,18 @@ public class OggFile extends Common {
psize += b2u(scratch[i]);
}
}
-
- // populate result array
- result[0] = (s.getFilePointer() - offset);
- result[1] = psize;
- result[2] = -1;
-
+
+ PageInfo pi = new PageInfo();
+ pi.header_len = (s.getFilePointer() - offset);
+ pi.payload_len = psize;
+ pi.type = -1;
+
/* next byte is most likely the type -> pre-read */
if(psize >= 1 && s.read(p_header, 0, 1) == 1) {
- result[2] = b2u(p_header[0]);
+ pi.type = b2u(p_header[0]);
}
-
- return result;
+
+ return pi;
}
/* In 'vorbiscomment' field is prefixed with \3vorbis in OGG files
@@ -108,7 +131,37 @@ public class OggFile extends Common {
if( (new String(pfx, 0, pfx_len)).equals("\3vorbis") == false )
xdie("Damaged packet found!");
- return parse_vorbis_comment(s, offset+pfx_len, pl_len-pfx_len);
+ return parse_vorbis_comment(s, this, offset+pfx_len, pl_len-pfx_len);
}
-
+
+ /*
+ ** Returns a hashma with parsed vorbis identification header data
+ **/
+ private HashMap parse_ogg_vorbis_identification(RandomAccessFile s, long offset, long pl_len) throws IOException {
+ /* Structure:
+ * 7 bytes of \1vorbis
+ * 4 bytes version
+ * 1 byte channels
+ * 4 bytes sampling rate
+ * 4 bytes bitrate max
+ * 4 bytes bitrate nominal
+ * 4 bytes bitrate min
+ **/
+ HashMap id_hash = new HashMap();
+ byte[] buff = new byte[28];
+
+ if(pl_len >= buff.length) {
+ s.seek(offset);
+ s.read(buff);
+ id_hash.put("version" , b2le32(buff, 7));
+ id_hash.put("channels" , b2u(buff[11]));
+ id_hash.put("sampling_rate" , b2le32(buff, 12));
+ id_hash.put("bitrate_minimal" , b2le32(buff, 16));
+ id_hash.put("bitrate_nominal" , b2le32(buff, 20));
+ id_hash.put("bitrate_maximal" , b2le32(buff, 24));
+ }
+
+ return id_hash;
+ }
+
};
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/OpusFile.java b/app/src/main/java/github/daneren2005/dsub/util/tags/OpusFile.java
new file mode 100644
index 00000000..38b402bb
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/OpusFile.java
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2015 Adrian Ulrich <adrian@blinkenlights.ch>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+package github.daneren2005.dsub.util.tags;
+
+
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.HashMap;
+
+
+public class OpusFile extends OggFile {
+ // A list of tags we are going to ignore in the OpusTags section
+ public static final String[] FORBIDDEN_TAGS = {"REPLAYGAIN_TRACK_GAIN", "REPLAYGAIN_TRACK_PEAK", "REPLAYGAIN_ALBUM_GAIN", "REPLAYGAIN_ALBUM_PEAK"};
+
+ public OpusFile() {
+ }
+
+ public HashMap getTags(RandomAccessFile s) throws IOException {
+
+ // The opus specification is very strict: The first packet MUST
+ // contain the OpusHeader while the 2nd MUST contain the
+ // OggHeader payload: https://wiki.xiph.org/OggOpus
+ long pos = 0;
+ PageInfo pi = parse_stream_page(s, pos);
+
+ HashMap tags = new HashMap();
+ HashMap opus_head = parse_opus_head(s, pos+pi.header_len, pi.payload_len);
+ pos += pi.header_len+pi.payload_len;
+
+ // Check if we parsed a version number and ensure it doesn't have any
+ // of the upper 4 bits set (eg: <= 15)
+ if(opus_head.containsKey("version") && (Integer)opus_head.get("version") <= 0xF) {
+ // Get next page: The spec requires this to be an OpusTags head
+ pi = parse_stream_page(s, pos);
+ tags = parse_opus_vorbis_comment(s, pos+pi.header_len, pi.payload_len);
+ // ...and merge replay gain intos into the tags map
+ calculate_gain(opus_head, tags);
+ }
+
+ return tags;
+ }
+
+ /**
+ * Adds replay gain information to the tags hash map
+ */
+ private void calculate_gain(HashMap header, HashMap tags) {
+ // Remove any unacceptable tags (Opus files must not have
+ // their own REPLAYGAIN_* fields)
+ for(String k : FORBIDDEN_TAGS) {
+ tags.remove(k);
+ }
+ // Include the gain value found in the opus header
+ int header_gain = (Integer)header.get("header_gain");
+ addTagEntry(tags, "R128_BASTP_BASE_GAIN", ""+header_gain);
+ }
+
+
+ /**
+ * Attempts to parse an OpusHead block at given offset.
+ * Returns an hash-map, will be empty on failure
+ */
+ private HashMap parse_opus_head(RandomAccessFile s, long offset, long pl_len) throws IOException {
+ /* Structure:
+ * 8 bytes of 'OpusHead'
+ * 1 byte version
+ * 1 byte channel count
+ * 2 bytes pre skip
+ * 4 bytes input-sample-rate
+ * 2 bytes outputGain as Q7.8
+ * 1 byte channel map
+ * --> 19 bytes
+ */
+
+ HashMap id_hash = new HashMap();
+ byte[] buff = new byte[19];
+ if(pl_len >= buff.length) {
+ s.seek(offset);
+ s.read(buff);
+ if((new String(buff, 0, 8)).equals("OpusHead")) {
+ id_hash.put("version" , b2u(buff[8]));
+ id_hash.put("channels" , b2u(buff[9]));
+ id_hash.put("pre_skip" , b2le16(buff, 10));
+ id_hash.put("sampling_rate", b2le32(buff, 12));
+ id_hash.put("header_gain" , (int)((short)b2le16(buff, 16)));
+ id_hash.put("channel_map" , b2u(buff[18]));
+ }
+ }
+
+ return id_hash;
+ }
+
+ /**
+ * Parses an OpusTags section
+ * Returns a hash map of the found tags
+ */
+ private HashMap parse_opus_vorbis_comment(RandomAccessFile s, long offset, long pl_len) throws IOException {
+ final int magic_len = 8; // OpusTags
+ byte[] magic = new byte[magic_len];
+
+ if(pl_len < magic_len)
+ xdie("opus comment field is too short!");
+
+ // Read and check magic signature
+ s.seek(offset);
+ s.read(magic);
+
+ if((new String(magic, 0, magic_len)).equals("OpusTags") == false)
+ xdie("Damaged packet found!");
+
+ return parse_vorbis_comment(s, this, offset+magic_len, pl_len-magic_len);
+ }
+
+}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/PageInfo.java b/app/src/main/java/github/daneren2005/dsub/util/tags/PageInfo.java
new file mode 100644
index 00000000..1081e355
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/PageInfo.java
@@ -0,0 +1,16 @@
+package github.daneren2005.dsub.util.tags;
+
+import java.io.IOException;
+import java.io.RandomAccessFile;
+
+public class PageInfo {
+
+ long header_len;
+ long payload_len;
+ int type;
+ boolean last_page;
+
+ public static interface PageParser {
+ PageInfo parse_stream_page(RandomAccessFile fh, long offset) throws IOException;
+ }
+}
diff --git a/app/src/main/java/github/daneren2005/dsub/util/tags/RawFile.java b/app/src/main/java/github/daneren2005/dsub/util/tags/RawFile.java
new file mode 100644
index 00000000..2fa6cf30
--- /dev/null
+++ b/app/src/main/java/github/daneren2005/dsub/util/tags/RawFile.java
@@ -0,0 +1,35 @@
+/*
+ * Copyright (C) 2017 Google Inc.
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+package github.daneren2005.dsub.util.tags;
+
+import java.io.IOException;
+import java.io.RandomAccessFile;
+import java.util.HashMap;
+
+public class RawFile extends Common {
+
+ /**
+ * Returns the tags of a Raw File which is just an empty HashMap.
+ * This shall be used for raw streams with no (supported) tags.
+ */
+ public HashMap getTags(RandomAccessFile s) throws IOException {
+ HashMap tags = new HashMap();
+ return tags;
+ }
+}
+