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authorSean Bartell <wingedtachikoma@gmail.com>2011-06-24 01:25:21 -0400
committerNils Wallménius <nils@rockbox.org>2012-03-18 12:00:39 +0100
commitb5716df4cb2837bbbc42195cf1aefcf03e21d6a6 (patch)
tree130cd712e2e00893b6df9959a375a8d9523a1aca /apps/metadata/mp3.c
parent24bd9d5393dbe39a5c6194877bc00ede669b1d5d (diff)
downloadrockbox-b5716df4cb2837bbbc42195cf1aefcf03e21d6a6.tar.gz
rockbox-b5716df4cb2837bbbc42195cf1aefcf03e21d6a6.zip
Build librbcodec with DSP and metadata.
All associated files are moved to /lib/rbcodec. Change-Id: I572ddd2b8a996aae1e98c081d06b1ed356dce222
Diffstat (limited to 'apps/metadata/mp3.c')
-rw-r--r--apps/metadata/mp3.c193
1 files changed, 0 insertions, 193 deletions
diff --git a/apps/metadata/mp3.c b/apps/metadata/mp3.c
deleted file mode 100644
index feb1a52f77..0000000000
--- a/apps/metadata/mp3.c
+++ /dev/null
@@ -1,193 +0,0 @@
-/***************************************************************************
- * __________ __ ___.
- * Open \______ \ ____ ____ | | _\_ |__ _______ ___
- * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
- * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
- * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
- * \/ \/ \/ \/ \/
- * $Id$
- *
- * Copyright (C) 2002 by Daniel Stenberg
- *
- * 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.
- *
- ****************************************************************************/
-/*
- * Parts of this code has been stolen from the Ample project and was written
- * by David H�deman. It has since been extended and enhanced pretty much by
- * all sorts of friendly Rockbox people.
- *
- */
-
- /* tagResolver and associated code copyright 2003 Thomas Paul Diffenbach
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdbool.h>
-#include "string-extra.h"
-#include "config.h"
-#include "file.h"
-#include "logf.h"
-
-#include "system.h"
-#include "metadata.h"
-#include "mp3data.h"
-#include "metadata_common.h"
-#include "metadata_parsers.h"
-
-/*
- * Calculates the length (in milliseconds) of an MP3 file.
- *
- * Modified to only use integers.
- *
- * Arguments: file - the file to calculate the length upon
- * entry - the entry to update with the length
- *
- * Returns: the song length in milliseconds,
- * 0 means that it couldn't be calculated
- */
-static int getsonglength(int fd, struct mp3entry *entry)
-{
- unsigned long filetime = 0;
- struct mp3info info;
- long bytecount;
-
- /* Start searching after ID3v2 header */
- if(-1 == lseek(fd, entry->id3v2len, SEEK_SET))
- return 0;
-
- bytecount = get_mp3file_info(fd, &info);
-
- logf("Space between ID3V2 tag and first audio frame: 0x%lx bytes",
- bytecount);
-
- if(bytecount < 0)
- return -1;
-
- bytecount += entry->id3v2len;
-
- /* Validate byte count, in case the file has been edited without
- * updating the header.
- */
- if (info.byte_count)
- {
- const unsigned long expected = entry->filesize - entry->id3v1len
- - entry->id3v2len;
- const unsigned long diff = MAX(10240, info.byte_count / 20);
-
- if ((info.byte_count > expected + diff)
- || (info.byte_count < expected - diff))
- {
- logf("Note: info.byte_count differs from expected value by "
- "%ld bytes", labs((long) (expected - info.byte_count)));
- info.byte_count = 0;
- info.frame_count = 0;
- info.file_time = 0;
- info.enc_padding = 0;
-
- /* Even if the bitrate was based on "known bad" values, it
- * should still be better for VBR files than using the bitrate
- * of the first audio frame.
- */
- }
- }
-
- entry->bitrate = info.bitrate;
- entry->frequency = info.frequency;
- entry->layer = info.layer;
- switch(entry->layer) {
-#if CONFIG_CODEC==SWCODEC
- case 0:
- entry->codectype=AFMT_MPA_L1;
- break;
-#endif
- case 1:
- entry->codectype=AFMT_MPA_L2;
- break;
- case 2:
- entry->codectype=AFMT_MPA_L3;
- break;
- }
-
- /* If the file time hasn't been established, this may be a fixed
- rate MP3, so just use the default formula */
-
- filetime = info.file_time;
-
- if(filetime == 0)
- {
- /* Prevent a division by zero */
- if (info.bitrate < 8)
- filetime = 0;
- else
- filetime = (entry->filesize - bytecount) / (info.bitrate / 8);
- /* bitrate is in kbps so this delivers milliseconds. Doing bitrate / 8
- * instead of filesize * 8 is exact, because mpeg audio bitrates are
- * always multiples of 8, and it avoids overflows. */
- }
-
- entry->frame_count = info.frame_count;
-
- entry->vbr = info.is_vbr;
- entry->has_toc = info.has_toc;
-
-#if CONFIG_CODEC==SWCODEC
- if (!entry->lead_trim)
- entry->lead_trim = info.enc_delay;
- if (!entry->tail_trim)
- entry->tail_trim = info.enc_padding;
-#endif
-
- memcpy(entry->toc, info.toc, sizeof(info.toc));
-
- /* Update the seek point for the first playable frame */
- entry->first_frame_offset = bytecount;
- logf("First frame is at %lx", entry->first_frame_offset);
-
- return filetime;
-}
-
-/*
- * Checks all relevant information (such as ID3v1 tag, ID3v2 tag, length etc)
- * about an MP3 file and updates it's entry accordingly.
- *
- Note, that this returns true for successful, false for error! */
-bool get_mp3_metadata(int fd, struct mp3entry *entry)
-{
- entry->title = NULL;
- entry->filesize = filesize(fd);
- entry->id3v2len = getid3v2len(fd);
- entry->tracknum = 0;
- entry->discnum = 0;
-
- if (entry->id3v2len)
- setid3v2title(fd, entry);
- int len = getsonglength(fd, entry);
- if (len < 0)
- return false;
- entry->length = len;
-
- /* Subtract the meta information from the file size to get
- the true size of the MP3 stream */
- entry->filesize -= entry->first_frame_offset;
-
- /* only seek to end of file if no id3v2 tags were found */
- if (!entry->id3v2len) {
- setid3v1title(fd, entry);
- }
-
- if(!entry->length || (entry->filesize < 8 ))
- /* no song length or less than 8 bytes is hereby considered to be an
- invalid mp3 and won't be played by us! */
- return false;
-
- return true;
-}