mirror of
https://github.com/owntone/owntone-server.git
synced 2024-12-26 23:25:56 -05:00
115 lines
3.6 KiB
C
115 lines
3.6 KiB
C
/*
|
|
* $Id$
|
|
*
|
|
* Copyright (C) 2003 Ron Pedde (ron@pedde.com)
|
|
*
|
|
* 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
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <fcntl.h>
|
|
|
|
#include "err.h"
|
|
#include "mp3-scanner.h"
|
|
|
|
#define GET_WAV_INT32(p) ((((unsigned long)((p)[3])) << 24) | \
|
|
(((unsigned long)((p)[2])) << 16) | \
|
|
(((unsigned long)((p)[1])) << 8) | \
|
|
(((unsigned long)((p)[0]))))
|
|
|
|
#define GET_WAV_INT16(p) ((((unsigned long)((p)[1])) << 8) | \
|
|
(((unsigned long)((p)[0]))))
|
|
|
|
/**
|
|
* Get info from the actual wav headers. Since there is no
|
|
* metainfo in .wav files (or at least know standard I
|
|
* know about), this merely gets duration, bitrate, etc.
|
|
*
|
|
* @param filename file to scan
|
|
* @param pmp3 MP3FILE struct to be filled
|
|
* @returns TRUE if song should be added to database, FALSE otherwise
|
|
*/
|
|
int scan_get_wavinfo(char *filename, MP3FILE *pmp3) {
|
|
FILE *infile;
|
|
size_t rl;
|
|
unsigned char hdr[44];
|
|
unsigned long chunk_data_length;
|
|
unsigned long format_data_length;
|
|
unsigned long compression_code;
|
|
unsigned long channel_count;
|
|
unsigned long sample_rate;
|
|
unsigned long sample_bit_length;
|
|
unsigned long bit_rate;
|
|
unsigned long data_length;
|
|
unsigned long sec, ms;
|
|
|
|
DPRINTF(E_DBG,L_SCAN,"Getting WAV file info\n");
|
|
|
|
if(!(infile=fopen(filename,"rb"))) {
|
|
DPRINTF(E_WARN,L_SCAN,"Could not open %s for reading\n",filename);
|
|
return FALSE;
|
|
}
|
|
|
|
fseek(infile,0,SEEK_END);
|
|
pmp3->file_size = ftell(infile);
|
|
fseek(infile,0,SEEK_SET);
|
|
|
|
rl = fread(hdr, 1, 44, infile);
|
|
fclose(infile);
|
|
if (rl != 44) {
|
|
DPRINTF(E_WARN,L_SCAN,"Could not read wav header from %s\n",filename);
|
|
return FALSE;
|
|
}
|
|
|
|
if (strncmp((char*)hdr + 0, "RIFF", 4) ||
|
|
strncmp((char*)hdr + 8, "WAVE", 4) ||
|
|
strncmp((char*)hdr + 12, "fmt ", 4) ||
|
|
strncmp((char*)hdr + 36, "data", 4)) {
|
|
DPRINTF(E_WARN,L_SCAN,"Invalid wav header in %s\n",filename);
|
|
return FALSE;
|
|
}
|
|
|
|
chunk_data_length = GET_WAV_INT32(hdr + 4);
|
|
format_data_length = GET_WAV_INT32(hdr + 16);
|
|
compression_code = GET_WAV_INT16(hdr + 20);
|
|
channel_count = GET_WAV_INT16(hdr + 22);
|
|
sample_rate = GET_WAV_INT32(hdr + 24);
|
|
sample_bit_length = GET_WAV_INT16(hdr + 34);
|
|
data_length = GET_WAV_INT32(hdr + 40);
|
|
|
|
if ((format_data_length != 16) ||
|
|
(compression_code != 1) ||
|
|
(channel_count < 1)) {
|
|
DPRINTF(E_WARN,L_SCAN,"Invalid wav header in %s\n",filename);
|
|
return FALSE;
|
|
}
|
|
|
|
bit_rate = sample_rate * channel_count * ((sample_bit_length + 7) / 8) * 8;
|
|
pmp3->bitrate = bit_rate / 1000;
|
|
pmp3->samplerate = sample_rate;
|
|
sec = data_length / (bit_rate / 8);
|
|
ms = ((data_length % (bit_rate / 8)) * 1000) / (bit_rate / 8);
|
|
pmp3->song_length = (sec * 1000) + ms;
|
|
|
|
return TRUE;
|
|
}
|
|
|