/*
* Read infos into header of first frame
*/
gboolean
Mpeg_Header_Read_File_Info (gchar *filename, ET_File_Info *ETFileInfo)
{
/*
* With id3lib, the header frame couldn't be read if the file contains an ID3v2 tag with an APIC frame
*/
ID3Tag *id3_tag = NULL; /* Tag defined by the id3lib */
const Mp3_Headerinfo* headerInfo = NULL;
g_return_val_if_fail (filename != NULL || ETFileInfo != NULL, FALSE);
/* Get size of file */
ETFileInfo->size = Get_File_Size (filename);
/* Get data from tag */
if ( (id3_tag = ID3Tag_New()) == NULL )
return FALSE;
/* Link the file to the tag (uses ID3TT_ID3V2 to get header if APIC is present in Tag) */
ID3Tag_LinkWithFlags(id3_tag,filename,ID3TT_ID3V2);
if ( (headerInfo = ID3Tag_GetMp3HeaderInfo(id3_tag)) )
{
switch (headerInfo->version)
{
case MPEGVERSION_1:
ETFileInfo->version = 1;
ETFileInfo->mpeg25 = FALSE;
break;
case MPEGVERSION_2:
ETFileInfo->version = 2;
ETFileInfo->mpeg25 = FALSE;
break;
case MPEGVERSION_2_5:
ETFileInfo->mpeg25 = TRUE;
ETFileInfo->mpeg25 = FALSE;
break;
default:
break;
}
switch (headerInfo->layer)
{
case MPEGLAYER_I:
ETFileInfo->layer = 1;
break;
case MPEGLAYER_II:
ETFileInfo->layer = 2;
break;
case MPEGLAYER_III:
ETFileInfo->layer = 3;
break;
default:
break;
}
// Samplerate
ETFileInfo->samplerate = headerInfo->frequency;
// Mode -> Seems to be detected but incorrect?!
switch (headerInfo->modeext)
{
case MP3CHANNELMODE_STEREO:
ETFileInfo->mode = 0;
break;
case MP3CHANNELMODE_JOINT_STEREO:
ETFileInfo->mode = 1;
break;
case MP3CHANNELMODE_DUAL_CHANNEL:
ETFileInfo->mode = 2;
break;
case MP3CHANNELMODE_SINGLE_CHANNEL:
ETFileInfo->mode = 3;
break;
default:
break;
}
// Bitrate
if (headerInfo->vbr_bitrate <= 0)
{
ETFileInfo->variable_bitrate = FALSE;
ETFileInfo->bitrate = headerInfo->bitrate/1000;
}else
{
ETFileInfo->variable_bitrate = TRUE;
ETFileInfo->bitrate = headerInfo->vbr_bitrate/1000;
}
// Duration
ETFileInfo->duration = headerInfo->time;
}
/* Free allocated data */
ID3Tag_Delete(id3_tag);
return TRUE;
}
/*
* Read infos into header of first frame
*/
gboolean Mpeg_Header_Read_File_Info (gchar *filename, ET_File_Info *ETFileInfo)
{
#if (!USE_ID3LIB_4_HEADER)
FILE *file;
gulong filesize;
if (!filename || !ETFileInfo)
return FALSE;
/* Get size of file */
filesize = Get_File_Size(filename);
ETFileInfo->size = filesize;
/*
* This part was taken from XMMS
*/
if ((file = fopen(filename, "rb")) != NULL)
{
guint32 head;
unsigned char tmp[4];
struct frame frm;
gboolean id3_found = FALSE;
if (fread(tmp, 1, 4, file) != 4)
{
fclose(file);
return FALSE;
}
// Skip data of the ID3v2.x tag (It may contain data similar to mpeg frame
// as, for example, in the id3 APIC frame) (patch from Artur Polaczynski)
if (tmp[0] == 'I' && tmp[1] == 'D' && tmp[2] == '3' && tmp[3] < 0xFF)
{
// ID3v2 tag skipeer $49 44 33 yy yy xx zz zz zz zz [zz size]
long id3v2size;
fseek(file, 2, SEEK_CUR); // Size is 6-9 position
if (fread(tmp, 1, 4, file) != 4) // Read bytes of tag size
{
fclose(file);
return FALSE;
}
id3v2size = 10 + ( (long)(tmp[3]) | ((long)(tmp[2]) << 7) | ((long)(tmp[1]) << 14) | ((long)(tmp[0]) << 21) );
fseek(file, id3v2size, SEEK_SET);
if (fread(tmp, 1, 4, file) != 4) // Read mpeg header
{
fclose(file);
return FALSE;
}
}
head = ((guint32) tmp[0] << 24) | ((guint32) tmp[1] << 16) | ((guint32) tmp[2] << 8) | (guint32) tmp[3];
while (!mpg123_head_check(head))
{
head <<= 8;
if (fread(tmp, 1, 1, file) != 1)
{
fclose(file);
return FALSE;
}
head |= tmp[0];
}
if (mpg123_decode_header(&frm, head))
{
guchar *buf;
gdouble tpf;
gint pos;
XHEADDATA xing_header;
guint32 num_frames;
buf = g_malloc(frm.framesize + 4);
fseek(file, -4, SEEK_CUR);
fread(buf, 1, frm.framesize + 4, file);
xing_header.toc = NULL;
tpf = mpg123_compute_tpf(&frm);
// MPEG and Layer version
ETFileInfo->mpeg25 = frm.mpeg25;
if (!ETFileInfo->mpeg25)
ETFileInfo->version = frm.lsf+1;
ETFileInfo->layer = frm.lay;
//if (ETFileInfo->mpeg25) g_print("mpeg_level: MPEG 2.5, layer %d\n",ETFileInfo->layer);
//else g_print("mpeg_level: MPEG %d, layer %d\n",ETFileInfo->version,ETFileInfo->layer);
pos = ftell(file);
fseek(file, 0, SEEK_END);
// Variable bitrate? + bitrate
if ( (ETFileInfo->variable_bitrate=mpg123_get_xing_header(&xing_header,buf)) )
{
num_frames = xing_header.frames;
ETFileInfo->bitrate = (gint) ((xing_header.bytes * 8) / (tpf * xing_header.frames * 1000));
//g_print("Bitrate: Variable,\navg. bitrate: %d kb/s\n",ETFileInfo->bitrate);
} else
{
num_frames = ((ftell(file) - pos - (id3_found ? 128 : 0)) / mpg123_compute_bpf(&frm)) + 1;
ETFileInfo->bitrate = tabsel_123[frm.lsf][frm.lay - 1][frm.bitrate_index];
//g_print("Bitrate: %d kb/s\n",ETFileInfo->bitrate);
}
// Samplerate
ETFileInfo->samplerate = mpg123_freqs[frm.sampling_frequency];
// Mode
ETFileInfo->mode = frm.mode;
//g_print("Samplerate: %ld Hz\n", mpg123_freqs[frm.sampling_frequency]);
//g_print("%s\nError protection: %s\nCopyright: %s\nOriginal: %s\nEmphasis: %s\n", channel_mode_name(frm.mode), bool_label[frm.error_protection], bool_label[frm.copyright], bool_label[frm.original], emphasis[frm.emphasis]);
//g_print("%d frames\nFilesize: %lu B\n", num_frames, ftell(file));
g_free(buf);
}
// Duration
ETFileInfo->duration = mpg123_get_song_time(file)/1000;
//g_print("time %s\n",Convert_Duration(ETFileInfo->duration));
fclose(file);
}else
{
gchar *filename_utf8 = filename_to_display(filename);
Log_Print(LOG_ERROR,_("ERROR while opening file: '%s' (%s)."),filename_utf8,g_strerror(errno));
g_free(filename_utf8);
return FALSE;
}
#else
// Needs to uncomment some #include at the beginning
/*
* With id3lib, the header frame couldn't be read if the file contains an ID3v2 tag with an APIC frame
*/
gulong filesize;
ID3Tag *id3_tag = NULL; /* Tag defined by the id3lib */
const Mp3_Headerinfo* headerInfo = NULL;
if (!filename || !ETFileInfo)
return FALSE;
/* Get size of file */
filesize = Get_File_Size(filename);
ETFileInfo->size = filesize;
/* Get data from tag */
if ( (id3_tag = ID3Tag_New()) == NULL )
return FALSE;
/* Link the file to the tag (uses ID3TT_ID3V2 to get header if APIC is present in Tag) */
ID3Tag_LinkWithFlags(id3_tag,filename,ID3TT_ID3V2);
/*ID3_STRUCT(Mp3_Headerinfo)
{
Mpeg_Layers layer;
Mpeg_Version version;
MP3_BitRates bitrate;
Mp3_ChannelMode channelmode;
Mp3_ModeExt modeext;
Mp3_Emphasis emphasis;
Mp3_Crc crc;
uint32 vbr_bitrate; // avg bitrate from xing header
uint32 frequency; // samplerate
uint32 framesize;
uint32 frames; // nr of frames
uint32 time; // nr of seconds in song
bool privatebit;
bool copyrighted;
bool original;
};*/
if ( (headerInfo = ID3Tag_GetMp3HeaderInfo(id3_tag)) )
{
switch (headerInfo->version)
{
case MPEGVERSION_1:
ETFileInfo->version = 1;
ETFileInfo->mpeg25 = FALSE;
break;
case MPEGVERSION_2:
ETFileInfo->version = 2;
ETFileInfo->mpeg25 = FALSE;
break;
case MPEGVERSION_2_5:
ETFileInfo->mpeg25 = TRUE;
ETFileInfo->mpeg25 = FALSE;
break;
default:
break;
}
switch (headerInfo->layer)
{
case MPEGLAYER_I:
ETFileInfo->layer = 1;
break;
case MPEGLAYER_II:
ETFileInfo->layer = 2;
break;
case MPEGLAYER_III:
ETFileInfo->layer = 3;
break;
default:
break;
}
// Samplerate
ETFileInfo->samplerate = headerInfo->frequency;
// Mode -> Seems to be detected but incorrect?!
switch (headerInfo->modeext)
{
case MP3CHANNELMODE_STEREO:
ETFileInfo->mode = 0;
break;
case MP3CHANNELMODE_JOINT_STEREO:
ETFileInfo->mode = 1;
break;
case MP3CHANNELMODE_DUAL_CHANNEL:
ETFileInfo->mode = 2;
break;
case MP3CHANNELMODE_SINGLE_CHANNEL:
ETFileInfo->mode = 3;
break;
default:
break;
}
// Bitrate
if (headerInfo->vbr_bitrate <= 0)
{
ETFileInfo->variable_bitrate = FALSE;
ETFileInfo->bitrate = headerInfo->bitrate/1000;
}else
{
ETFileInfo->variable_bitrate = TRUE;
ETFileInfo->bitrate = headerInfo->vbr_bitrate/1000;
}
// Duration
ETFileInfo->duration = headerInfo->time;
}
/* Free allocated data */
ID3Tag_Delete(id3_tag);
#endif
return TRUE;
}
