From 57c6f6e57ee7823678f98a21f44fb9563c228fca Mon Sep 17 00:00:00 2001
From: Dave Bryant <bryant@rockbox.org>
Date: Mon, 13 Jun 2005 06:00:35 +0000
Subject: Initial pass at WavPack codec playback support (and my first
 commit...)

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@6698 a1c6a512-1295-4272-9138-f99709370657
---
 apps/playback.c      | 50 +++++++++++++++++++++++++++++++++++++++++++++++++-
 apps/playback.h      |  1 +
 apps/plugins/SOURCES |  1 +
 apps/tree.c          |  1 +
 4 files changed, 52 insertions(+), 1 deletion(-)

diff --git a/apps/playback.c b/apps/playback.c
index 5454fd0e31..c91a3a8155 100644
--- a/apps/playback.c
+++ b/apps/playback.c
@@ -68,6 +68,7 @@ static volatile bool paused;
 #define CODEC_WAV      "/.rockbox/codecs/codecwav.rock";
 #define CODEC_A52      "/.rockbox/codecs/codeca52.rock";
 #define CODEC_MPC      "/.rockbox/codecs/codecmpc.rock";
+#define CODEC_WAVPACK  "/.rockbox/codecs/codecwavpack.rock";
 
 #define AUDIO_DEFAULT_WATERMARK      (1024*256)
 #define AUDIO_DEFAULT_FILECHUNK      (1024*32)
@@ -417,6 +418,8 @@ int probe_file_format(const char *filename)
         return AFMT_A52;
     else if (!strcasecmp("rm", suffix))
         return AFMT_REAL;
+    else if (!strcasecmp("wv", suffix))
+        return AFMT_WAVPACK;
         
     return AFMT_UNKNOWN;
         
@@ -521,6 +524,10 @@ bool loadcodec(const char *trackname, bool start_play)
         logf("Codec: Musepack");
         codec_path = CODEC_MPC;
         break;
+    case AFMT_WAVPACK:
+        logf("Codec: WAVPACK");
+        codec_path = CODEC_WAVPACK;
+        break;
     default:
         logf("Codec: Unsupported");
         snprintf(msgbuf, sizeof(msgbuf)-1, "No codec for: %s", trackname);
@@ -735,7 +742,6 @@ bool audio_load_track(int offset, bool start_play, int peek_offset)
         tracks[track_widx].taginfo_ready = true;
 
         break;
-    
 
     case AFMT_FLAC:
         /* A simple parser to read vital metadata from a FLAC file - length, frequency, bitrate etc. */
@@ -886,6 +892,48 @@ bool audio_load_track(int offset, bool start_play, int peek_offset)
         tracks[track_widx].taginfo_ready = true;
         break;
 
+    case AFMT_WAVPACK:
+        /* A simple parser to read basic information from a WavPack file.
+         * This will fail on WavPack files that don't have the WavPack header
+         * as the first thing (i.e. self-extracting WavPack files) or WavPack
+         * files that have so much extra RIFF data stored in the first block
+         * that they don't have samples (very rare, I would think).
+         */
+
+        /* Use the trackname part of the id3 structure as a temporary buffer */
+        buf=tracks[track_widx].id3.path;
+
+        lseek(fd, 0, SEEK_SET);
+
+        rc = read(fd, buf, 32);
+        if (rc < 32) {
+            close(fd);
+            return false;
+        }
+
+        if (memcmp (buf, "wvpk", 4) != 0 || buf [9] != 4 || buf [8] < 2) {          
+            logf ("%s is not a WavPack file\n", trackname);
+            close (fd);
+            return (false);
+        }
+
+        tracks[track_widx].id3.vbr = true;   /* All WavPack files are VBR */
+        tracks[track_widx].id3.filesize = filesize (fd);
+        tracks[track_widx].id3.frequency = 44100;
+
+        if ((buf [20] | buf [21] | buf [22] | buf [23]) &&
+            (buf [12] & buf [13] & buf [14] & buf [15]) != 0xff) {
+                totalsamples = (buf[15] << 24) | (buf[14] << 16) | (buf[13] << 8) | buf[12];
+                tracks[track_widx].id3.length = (totalsamples + 220) / 441 * 10;
+                tracks[track_widx].id3.bitrate = filesize (fd) /
+                    (tracks[track_widx].id3.length / 8);
+        }
+
+        lseek (fd, 0, SEEK_SET);
+        strncpy (tracks[track_widx].id3.path, trackname, sizeof (tracks[track_widx].id3.path));
+        tracks[track_widx].taginfo_ready = true;
+        break;
+
     /* If we don't know how to read the metadata, just store the filename */
     default:
         strncpy(tracks[track_widx].id3.path,trackname,sizeof(tracks[track_widx].id3.path));
diff --git a/apps/playback.h b/apps/playback.h
index c9668bd9a2..18f92488fa 100644
--- a/apps/playback.h
+++ b/apps/playback.h
@@ -34,6 +34,7 @@
 #define AFMT_A52         0x0400  // A/52 (aka AC3) audio
 #define AFMT_REAL        0x0800  // Realaudio
 #define AFMT_UNKNOWN     0x1000  // Unknown file format
+#define AFMT_WAVPACK     0x2000  // WavPack
 
 #define CODEC_SET_FILEBUF_WATERMARK     1
 #define CODEC_SET_FILEBUF_CHUNKSIZE     2
diff --git a/apps/plugins/SOURCES b/apps/plugins/SOURCES
index 7131f8329e..34f014d9d6 100644
--- a/apps/plugins/SOURCES
+++ b/apps/plugins/SOURCES
@@ -78,6 +78,7 @@ codecflac.c
 codecwav.c
 codeca52.c
 codecmpc.c
+codecwavpack.c
 #endif
 wv2wav.c
 mpc2wav.c
diff --git a/apps/tree.c b/apps/tree.c
index cd034fe590..652a4e5235 100644
--- a/apps/tree.c
+++ b/apps/tree.c
@@ -80,6 +80,7 @@ const struct filetype filetypes[] = {
     { ".ac3", TREE_ATTR_MPA, File, VOICE_EXT_MPA },
     { ".a52", TREE_ATTR_MPA, File, VOICE_EXT_MPA },
     { ".mpc", TREE_ATTR_MPA, File, VOICE_EXT_MPA },
+    { ".wv",  TREE_ATTR_MPA, File, VOICE_EXT_MPA },
 #endif
     { ".m3u", TREE_ATTR_M3U, Playlist, LANG_PLAYLIST },
     { ".cfg", TREE_ATTR_CFG, Config, VOICE_EXT_CFG },
-- 
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