Build librbcodec with DSP and metadata.

All associated files are moved to /lib/rbcodec.

Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222

1 files changed, 381 insertions, 0 deletions

diff --git a/lib/rbcodec/metadata/vorbis.c b/lib/rbcodec/metadata/vorbis.c
new file mode 100644
index 0000000000..58bd781873
--- /dev/null
+++ b/lib/rbcodec/metadata/vorbis.c
@@ -0,0 +1,381 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2005 Dave Chapman
+ *
+ * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <ctype.h>
+#include <inttypes.h>
+
+#include "system.h"
+#include "metadata.h"
+#include "metadata_common.h"
+#include "metadata_parsers.h"
+#include "structec.h"
+
+/* Define LOGF_ENABLE to enable logf output in this file */
+/*#define LOGF_ENABLE*/
+#include "logf.h"
+
+struct file
+{
+    int fd;
+    bool packet_ended;
+    long packet_remaining;
+};
+
+
+/* Read an Ogg page header. file->packet_remaining is set to the size of the
+ * first packet on the page; file->packet_ended is set to true if the packet
+ * ended on the current page. Returns true if the page header was
+ * successfully read.
+ */
+static bool file_read_page_header(struct file* file)
+{
+    unsigned char buffer[64];
+    ssize_t table_left;
+
+    /* Size of page header without segment table */
+    if (read(file->fd, buffer, 27) != 27)
+    {
+        return false;
+    }
+        
+    if (memcmp("OggS", buffer, 4))
+    {
+        return false;
+    }
+
+    /* Skip pattern (4), version (1), flags (1), granule position (8),
+     * serial (4), pageno (4), checksum (4)
+     */
+    table_left = buffer[26];
+    file->packet_remaining = 0;
+
+    /* Read segment table for the first packet */
+    do
+    {
+        ssize_t count = MIN(sizeof(buffer), (size_t) table_left);
+        int i;
+
+        if (read(file->fd, buffer, count) < count)
+        {
+            return false;
+        }
+        
+        table_left -= count;
+        
+        for (i = 0; i < count; i++)
+        {
+            file->packet_remaining += buffer[i];
+            
+            if (buffer[i] < 255)
+            {
+                file->packet_ended = true;
+                
+                /* Skip remainder of the table */
+                if (lseek(file->fd, table_left, SEEK_CUR) < 0)
+                {
+                    return false;
+                }
+                
+                table_left = 0;
+                break;
+            }
+        }
+    }
+    while (table_left > 0);
+    
+    return true;
+}
+
+
+/* Read (up to) buffer_size of data from the file. If buffer is NULL, just
+ * skip ahead buffer_size bytes (like lseek). Returns number of bytes read,
+ * 0 if there is no more data to read (in the packet or the file), < 0 if a
+ * read error occurred.
+ */
+static ssize_t file_read(struct file* file, void* buffer, size_t buffer_size)
+{
+    ssize_t done = 0;
+    ssize_t count = -1;
+    
+    do
+    {
+        if (file->packet_remaining <= 0)
+        {
+            if (file->packet_ended)
+            {
+                break;
+            }
+
+            if (!file_read_page_header(file))
+            {
+                count = -1;
+                break;
+            }
+        }
+
+        count = MIN(buffer_size, (size_t) file->packet_remaining);
+
+        if (buffer)
+        {
+            count = read(file->fd, buffer, count);
+        }
+        else
+        {
+            if (lseek(file->fd, count, SEEK_CUR) < 0)
+            {
+                count = -1;
+            }
+        }
+        
+        if (count <= 0)
+        {
+            break;
+        }
+
+        if (buffer)
+        {
+            buffer += count;
+        }
+
+        buffer_size -= count;
+        done += count;
+        file->packet_remaining -= count;
+    }
+    while (buffer_size > 0);
+
+    return (count < 0 ? count : done);
+}
+
+
+/* Read an int32 from file. Returns false if a read error occurred.
+ */
+static bool file_read_int32(struct file* file, int32_t* value)
+{
+    char buf[sizeof(int32_t)];
+
+    if (file_read(file, buf, sizeof(buf)) < (ssize_t) sizeof(buf))
+    {
+        return false;
+    }
+    
+    *value = get_long_le(buf);
+    return true;
+}
+
+
+/* Read a string from the file. Read up to buffer_size bytes, or, if eos
+ * != -1, until the eos character is found (eos is not stored in buf,
+ * unless it is nil). Writes up to buffer_size chars to buf, always
+ * terminating with a nil. Returns number of chars read or < 0 if a read
+ * error occurred.
+ *
+ * Unfortunately this is a slightly modified copy of read_string() in
+ * metadata_common.c...
+ */
+static long file_read_string(struct file* file, char* buffer,
+    long buffer_size, int eos, long size)
+{
+    long read_bytes = 0;
+    
+    while (size > 0)
+    {
+        char c;
+
+        if (file_read(file, &c, 1) != 1)
+        {
+            read_bytes = -1;
+            break;
+        }
+        
+        read_bytes++;
+        size--;
+        
+        if ((eos != -1) && (eos == (unsigned char) c))
+        {
+            break;
+        }
+        
+        if (buffer_size > 1)
+        {
+            *buffer++ = c;
+            buffer_size--;
+        }
+        else if (eos == -1)
+        {
+            /* No point in reading any more, skip remaining data */
+            if (file_read(file, NULL, size) < 0)
+            {
+                read_bytes = -1;
+            }
+            else
+            {
+                read_bytes += size;
+            }
+            
+            break;
+        }
+    }
+    
+    *buffer = 0;
+    return read_bytes;
+}
+
+
+/* Init struct file for reading from fd. type is the AFMT_* codec type of
+ * the file, and determines if Ogg pages are to be read. remaining is the
+ * max amount to read if codec type is FLAC; it is ignored otherwise.
+ * Returns true if the file was successfully initialized.
+ */
+static bool file_init(struct file* file, int fd, int type, int remaining)
+{
+    memset(file, 0, sizeof(*file));
+    file->fd = fd;
+    
+    if (type == AFMT_OGG_VORBIS || type == AFMT_SPEEX)
+    {
+        if (!file_read_page_header(file))
+        {
+            return false;
+        }
+    }
+
+    if (type == AFMT_OGG_VORBIS)
+    {
+        char buffer[7];
+
+        /* Read packet header (type and id string) */
+        if (file_read(file, buffer, sizeof(buffer)) < (ssize_t) sizeof(buffer))
+        {
+            return false;
+        }
+
+        /* The first byte of a packet is the packet type; comment packets
+         * are type 3.
+         */
+        if (buffer[0] != 3)
+        {
+            return false;
+        }
+    }
+    else if (type == AFMT_FLAC)
+    {
+        file->packet_remaining = remaining;
+        file->packet_ended = true;
+    }
+    
+    return true;
+}
+
+
+/* Read the items in a Vorbis comment packet. For Ogg files, the file must
+ * be located on a page start, for other files, the beginning of the comment
+ * data (i.e., the vendor string length). Returns total size of the
+ * comments, or 0 if there was a read error.
+ */
+long read_vorbis_tags(int fd, struct mp3entry *id3, 
+    long tag_remaining)
+{
+    struct file file;
+    char *buf = id3->id3v2buf;
+    int32_t comment_count;
+    int32_t len;
+    long comment_size = 0;
+    int buf_remaining = sizeof(id3->id3v2buf) + sizeof(id3->id3v1buf);
+    int i;
+    
+    if (!file_init(&file, fd, id3->codectype, tag_remaining))
+    {
+        return 0;
+    }
+    
+    /* Skip vendor string */
+
+    if (!file_read_int32(&file, &len) || (file_read(&file, NULL, len) < 0))
+    {
+        return 0;
+    }
+
+    if (!file_read_int32(&file, &comment_count))
+    {
+        return 0;
+    }
+    
+    comment_size += 4 + len + 4;
+
+    for (i = 0; i < comment_count && file.packet_remaining > 0; i++)
+    {
+        char name[TAG_NAME_LENGTH];
+        int32_t read_len;
+
+        if (!file_read_int32(&file, &len))
+        {
+            return 0;
+        }
+        
+        comment_size += 4 + len;
+        read_len = file_read_string(&file, name, sizeof(name), '=', len);
+        
+        if (read_len < 0)
+        {
+            return 0;
+        }
+
+        len -= read_len;
+        read_len = file_read_string(&file, id3->path, sizeof(id3->path), -1, len);
+
+        if (read_len < 0)
+        {
+            return 0;
+        }
+
+        logf("Vorbis comment %d: %s=%s", i, name, id3->path);
+
+        /* Is it an embedded cuesheet? */
+        if (!strcasecmp(name, "CUESHEET"))
+        {
+            id3->has_embedded_cuesheet = true;
+            id3->embedded_cuesheet.pos = lseek(file.fd, 0, SEEK_CUR) - read_len;
+            id3->embedded_cuesheet.size = len;
+            id3->embedded_cuesheet.encoding = CHAR_ENC_UTF_8;
+        }
+        else
+        {
+            len = parse_tag(name, id3->path, id3, buf, buf_remaining,
+                TAGTYPE_VORBIS);
+        }
+
+        buf += len;
+        buf_remaining -= len;
+    }
+
+    /* Skip to the end of the block (needed by FLAC) */
+    if (file.packet_remaining)
+    {
+        if (file_read(&file, NULL, file.packet_remaining) < 0)
+        {
+            return 0;
+        }
+    }
+
+    return comment_size;
+}