summaryrefslogtreecommitdiffstats
path: root/src/modules/mediaplayer/mp_mp3.cpp
diff options
context:
space:
mode:
Diffstat (limited to 'src/modules/mediaplayer/mp_mp3.cpp')
-rw-r--r--src/modules/mediaplayer/mp_mp3.cpp468
1 files changed, 468 insertions, 0 deletions
diff --git a/src/modules/mediaplayer/mp_mp3.cpp b/src/modules/mediaplayer/mp_mp3.cpp
new file mode 100644
index 00000000..6e27fa5f
--- /dev/null
+++ b/src/modules/mediaplayer/mp_mp3.cpp
@@ -0,0 +1,468 @@
+//=============================================================================
+//
+// File : mp_mp3.cpp
+// Creation date : Fri Mar 25 20:01:25 2005 GMT by Szymon Stefanek
+//
+// This file is part of the KVirc irc client distribution
+// Copyright (C) 2005 Szymon Stefanek (pragma at kvirc dot net)
+//
+// This file is based on the mp3tech.c. It is released under the original
+// license and the original copyright notice follows.
+//
+// mp3tech.c
+//
+// Copyright (C) 2000 Cedric Tefft <cedric@earthling.net>
+//
+// 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., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+// This file is based in part on:
+//
+// * MP3Info 0.5 by Ricardo Cerqueira <rmc@rccn.net>
+// * MP3Stat 0.9 by Ed Sweetman <safemode@voicenet.com> and
+// Johannes Overmann <overmann@iname.com>
+//
+// There has been also a remarkable work by Cristopher Tieckle (Crissi)
+//
+//=============================================================================
+
+#include "mp_mp3.h"
+#include "kvi_options.h"
+
+#include <qfileinfo.h>
+#include <qtextcodec.h>
+
+#define MAXGENRE 147
+#define GENREROWS 50
+
+/*
+ The Information is stored in the last 128 bytes of an MP3. The Tag
+ has got the following fields, and the offsets given here, are from
+ 0-127.
+
+ Field Length Offsets
+ Tag 3 0-2
+ Songname 30 3-32
+ Artist 30 33-62
+ Album 30 63-92
+ Year 4 93-96
+ Comment 30 97-126
+ Genre 1 127
+
+
+ The string-fields contain ASCII-data, coded in ISO-Latin 1 codepage.
+ Strings which are smaller than the field length are padded with zero-
+ bytes.
+
+ Tag: The tag is valid if this field contains the string "TAG". This
+ has to be uppercase!
+
+ Songname: This field contains the title of the MP3 (string as
+ above).
+
+ Artist: This field contains the artist of the MP3 (string as above).
+
+ Album: this field contains the album where the MP3 comes from
+ (string as above).
+
+ Year: this field contains the year when this song has originally
+ been released (string as above).
+
+ Comment: this field contains a comment for the MP3 (string as
+ above). Revision to this field has been made in ID3v1.1. See
+ A.4.
+
+ Genre: this byte contains the offset of a genre in a predefined
+ list the byte is treated as an unsigned byte. The offset is
+ starting from 0. See A.3.
+*/
+
+
+const char *typegenre [MAXGENRE+2] =
+{
+ "Blues","Classic Rock","Country","Dance","Disco","Funk","Grunge",
+ "Hip-Hop","Jazz","Metal","New Age","Oldies","Other","Pop","R&B",
+ "Rap","Reggae","Rock","Techno","Industrial","Alternative","Ska",
+ "Death Metal","Pranks","Soundtrack","Euro-Techno","Ambient",
+ "Trip-Hop","Vocal","Jazz+Funk","Fusion","Trance","Classical",
+ "Instrumental","Acid","House","Game","Sound Clip","Gospel","Noise",
+ "Alt. Rock","Bass","Soul","Punk","Space","Meditative",
+ "Instrumental Pop","Instrumental Rock","Ethnic","Gothic",
+ "Darkwave","Techno-Industrial","Electronic","Pop-Folk","Eurodance",
+ "Dream","Southern Rock","Comedy","Cult","Gangsta Rap","Top 40",
+ "Christian Rap","Pop/Funk","Jungle","Native American","Cabaret",
+ "New Wave","Psychedelic","Rave","Showtunes","Trailer","Lo-Fi",
+ "Tribal","Acid Punk","Acid Jazz","Polka","Retro","Musical",
+ "Rock & Roll","Hard Rock","Folk","Folk/Rock","National Folk",
+ "Swing","Fast-Fusion","Bebob","Latin","Revival","Celtic",
+ "Bluegrass","Avantgarde","Gothic Rock","Progressive Rock",
+ "Psychedelic Rock","Symphonic Rock","Slow Rock","Big Band",
+ "Chorus","Easy Listening","Acoustic","Humour","Speech","Chanson",
+ "Opera","Chamber Music","Sonata","Symphony","Booty Bass","Primus",
+ "Porn Groove","Satire","Slow Jam","Club","Tango","Samba",
+ "Folklore","Ballad","Power Ballad","Rhythmic Soul","Freestyle",
+ "Duet","Punk Rock","Drum Solo","A Cappella","Euro-House",
+ "Dance Hall","Goa","Drum & Bass","Club-House","Hardcore","Terror",
+ "Indie","BritPop","Negerpunk","Polsk Punk","Beat",
+ "Christian Gangsta Rap","Heavy Metal","Black Metal","Crossover",
+ "Contemporary Christian","Christian Rock","Merengue","Salsa",
+ "Thrash Metal","Anime","JPop","Synthpop",""
+};
+
+const char * get_typegenre(int idx)
+{
+ if(idx > MAXGENRE)return typegenre[12];
+ return typegenre[idx];
+}
+
+int galphagenreindex[MAXGENRE+2] =
+{
+ 148,123,74,73,34,99,40,20,26,145,90,
+ 116,41,135,85,96,138,89,0,107,132,65,88,
+ 104,102,97,136,61,141,1,32,128,112,57,140,
+ 2,139,58,125,3,50,22,4,55,127,122,120,
+ 98,52,48,124,25,54,84,81,115,80,119,5,
+ 30,36,59,126,38,91,49,6,79,129,137,7,
+ 35,100,131,19,46,47,33,146,29,8,63,86,
+ 71,45,142,9,77,82,64,133,10,66,39,11,
+ 103,12,75,134,53,62,13,109,117,23,108,92,
+ 93,67,121,43,14,15,68,16,76,87,118,78,
+ 17,143,114,110,69,21,111,95,105,42,37,24,
+ 56,44,101,83,94,106,147,113,51,18,130,144,
+ 60,70,31,72,27,28
+};
+
+int *alphagenreindex=&(galphagenreindex[1]);
+
+
+int layer_tab[4]= {0, 3, 2, 1};
+
+int frequencies[3][4] =
+{
+ {22050,24000,16000,50000}, /* MPEG 2.0 */
+ {44100,48000,32000,50000}, /* MPEG 1.0 */
+ {11025,12000,8000,50000} /* MPEG 2.5 */
+};
+
+int bitrate[2][3][14] =
+{
+ { /* MPEG 2.0 */
+ {32,48,56,64,80,96,112,128,144,160,176,192,224,256}, /* layer 1 */
+ {8,16,24,32,40,48,56,64,80,96,112,128,144,160}, /* layer 2 */
+ {8,16,24,32,40,48,56,64,80,96,112,128,144,160} /* layer 3 */
+ },
+ { /* MPEG 1.0 */
+ {32,64,96,128,160,192,224,256,288,320,352,384,416,448}, /* layer 1 */
+ {32,48,56,64,80,96,112,128,160,192,224,256,320,384}, /* layer 2 */
+ {32,40,48,56,64,80,96,112,128,160,192,224,256,320} /* layer 3 */
+ }
+};
+
+int frame_size_index[] = {24000, 72000, 72000};
+
+const char *mode_text[] =
+{
+ "Stereo", "Joint Stereo", "Dual Channel", "Mono"
+};
+
+const char *emphasis_text[] =
+{
+ "None", "50/15 Microseconds", "Reserved", "CCITT J 17"
+};
+void resetmp3infoStruct(mp3info *i)
+{
+ i->file=0;
+ i->datasize=0;
+ i->header_isvalid=0;
+ memset(&i->header,0,sizeof(i->header));
+ i->id3_isvalid=0;
+ memset(&i->id3,0,sizeof(i->id3));
+ i->vbr=0;
+ i->vbr_average=0;
+ i->seconds=0;
+ i->frames=0;
+ i->badframes=0;
+}
+
+int get_mp3_info(mp3info *mp3)
+{
+ int frame_type[15]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
+ float seconds=0,total_rate=0;
+ int frames=0,frame_types=0,frames_so_far=0;
+ int l,vbr_median=-1;
+ int bitrate,lastrate;
+ int counter=0;
+// mp3header header;
+
+ int sample_pos,data_start=0;
+
+ QFile fi(mp3->filename);
+ mp3->datasize=fi.size();//filestat.st_size;
+
+ get_id3(mp3);
+
+ if(get_first_header(mp3,0L))
+ {
+ data_start=ftell(mp3->file);
+ lastrate=15-mp3->header.bitrate;
+ while((counter < NUM_SAMPLES) && lastrate)
+ {
+ sample_pos=(counter*(mp3->datasize/NUM_SAMPLES+1))+data_start;
+ if(get_first_header(mp3,sample_pos))
+ {
+ bitrate=15-mp3->header.bitrate;
+ } else {
+ bitrate=-1;
+ }
+
+ if(bitrate != lastrate)
+ {
+ mp3->vbr=1;
+ }
+ lastrate=bitrate;
+ counter++;
+
+ }
+ mp3->frames=(mp3->datasize-data_start)/(l=frame_length(&mp3->header));
+ mp3->seconds = (int)((float)(frame_length(&mp3->header)*mp3->frames)/
+ (float)(header_bitrate(&mp3->header)*125)+0.5);
+ mp3->vbr_average = (float)header_bitrate(&mp3->header);
+ }
+
+ return 0;
+}
+
+
+int get_first_header(mp3info *mp3, long startpos)
+{
+ int k, l=0,c;
+ mp3header h, h2;
+ long valid_start=0;
+
+ fseek(mp3->file,startpos,SEEK_SET);
+ while(1)
+ {
+ while((c=fgetc(mp3->file)) != 255 && (c != EOF));
+ if(c == 255)
+ {
+ ungetc(c,mp3->file);
+ valid_start=ftell(mp3->file);
+ if((l=get_header(mp3->file,&h)))
+ {
+ fseek(mp3->file,l-FRAME_HEADER_SIZE,SEEK_CUR);
+ for(k=1; (k < MIN_CONSEC_GOOD_FRAMES) && (mp3->datasize-ftell(mp3->file) >= FRAME_HEADER_SIZE); k++)
+ {
+ if(!(l=get_header(mp3->file,&h2))) break;
+ if(!sameConstant(&h,&h2)) break;
+ fseek(mp3->file,l-FRAME_HEADER_SIZE,SEEK_CUR);
+ }
+ if(k == MIN_CONSEC_GOOD_FRAMES)
+ {
+ fseek(mp3->file,valid_start,SEEK_SET);
+ memcpy(&(mp3->header), &h2, sizeof(mp3header));
+ mp3->header_isvalid = 1;
+ return 1;
+ }
+ }
+ } else {
+ return 0;
+ }
+ }
+ return 0;
+}
+
+
+// Get next MP3 frame header.
+// Return codes:
+// positive value = Frame Length of this header
+// 0 = No, we did not retrieve a valid frame header
+
+int get_header(FILE *file,mp3header *header)
+{
+ unsigned char buffer[FRAME_HEADER_SIZE];
+ int fl;
+
+ if(fread(&buffer,FRAME_HEADER_SIZE,1,file)<1)
+ {
+ header->sync=0;
+ return 0;
+ }
+ header->sync=(((int)buffer[0]<<4) | ((int)(buffer[1]&0xE0)>>4));
+ if(buffer[1] & 0x10) header->version=(buffer[1] >> 3) & 1;
+ else header->version=2;
+ header->layer=(buffer[1] >> 1) & 3;
+ if((header->sync != 0xFFE) || (header->layer != 1))
+ {
+ header->sync=0;
+ return 0;
+ }
+ header->crc=buffer[1] & 1;
+ header->bitrate=(buffer[2] >> 4) & 0x0F;
+ header->freq=(buffer[2] >> 2) & 0x3;
+ header->padding=(buffer[2] >>1) & 0x1;
+ header->extension=(buffer[2]) & 0x1;
+ header->mode=(buffer[3] >> 6) & 0x3;
+ header->mode_extension=(buffer[3] >> 4) & 0x3;
+ header->copyright=(buffer[3] >> 3) & 0x1;
+ header->original=(buffer[3] >> 2) & 0x1;
+ header->emphasis=(buffer[3]) & 0x3;
+
+ return ((fl=frame_length(header)) >= MIN_FRAME_SIZE ? fl : 0);
+}
+
+int frame_length(mp3header *header)
+{
+ return header->sync == 0xFFE ?
+ (frame_size_index[3-header->layer]*((header->version&1)+1)*
+ header_bitrate(header)/header_frequency(header))+
+ header->padding : 1;
+}
+
+int header_layer(mp3header *h)
+{
+ return layer_tab[h->layer];
+}
+
+int header_bitrate(mp3header *h)
+{
+ if(h->bitrate > 0)
+ return bitrate[h->version & 1][3-h->layer][h->bitrate-1];
+ else
+ return -1; // unknown
+}
+
+int header_frequency(mp3header *h)
+{
+ return frequencies[h->version][h->freq];
+}
+
+const char *header_emphasis(mp3header *h)
+{
+ return emphasis_text[h->emphasis];
+}
+
+const char *header_mode(mp3header *h)
+{
+ return mode_text[h->mode];
+}
+
+int header_channels(mp3header * h)
+{
+ return h->mode == 3 ? 1 : 2;
+}
+
+int header_crc(mp3header *h)
+{
+ return (!h->crc);
+}
+
+int sameConstant(mp3header *h1, mp3header *h2)
+{
+ if((*(uint*)h1) == (*(uint*)h2)) return 1;
+
+ if((h1->version == h2->version ) &&
+ (h1->layer == h2->layer ) &&
+ (h1->crc == h2->crc ) &&
+ (h1->freq == h2->freq ) &&
+ (h1->mode == h2->mode ) &&
+ (h1->copyright == h2->copyright ) &&
+ (h1->original == h2->original ) &&
+ (h1->emphasis == h2->emphasis ))
+ return 1;
+ else return 0;
+}
+
+
+int get_id3(mp3info *mp3)
+{
+ // this will read ID3v1 tags
+ int retcode=0;
+ char fbuf[4];
+
+ if(mp3->datasize >= 128)
+ {
+ if(fseek(mp3->file, -128, SEEK_END ))
+ {
+ retcode |= 4;
+ } else {
+ fread(fbuf,1,3,mp3->file); fbuf[3] = '\0';
+ mp3->id3.genre[0]=255;
+
+ if(!strcmp((const char *)"TAG",(const char *)fbuf))
+ {
+ mp3->id3_isvalid=1;
+ mp3->datasize -= 128;
+ fseek(mp3->file, -125, SEEK_END);
+ fread(mp3->id3.title,1,30,mp3->file); mp3->id3.title[30] = '\0';
+ fread(mp3->id3.artist,1,30,mp3->file); mp3->id3.artist[30] = '\0';
+ fread(mp3->id3.album,1,30,mp3->file); mp3->id3.album[30] = '\0';
+ fread(mp3->id3.year,1,4,mp3->file); mp3->id3.year[4] = '\0';
+ fread(mp3->id3.comment,1,30,mp3->file); mp3->id3.comment[30] = '\0';
+ if(mp3->id3.comment[28] == '\0')
+ {
+ mp3->id3.track[0] = mp3->id3.comment[29];
+ }
+ fread(mp3->id3.genre,1,1,mp3->file);
+ unpad(mp3->id3.title);
+ unpad(mp3->id3.artist);
+ unpad(mp3->id3.album);
+ unpad(mp3->id3.year);
+ unpad(mp3->id3.comment);
+ }
+ }
+ }
+ return retcode;
+}
+
+char *pad(char *string, int length)
+{
+ int l;
+
+ l=strlen(string);
+ while(l<length)
+ {
+ string[l] = ' ';
+ l++;
+ }
+
+ string[l]='\0';
+ return string;
+}
+
+// Remove trailing whitespace from the end of a string
+
+char *unpad(char *string)
+{
+ char *pos=string+strlen(string)-1;
+ while(isspace(pos[0])) (pos--)[0]=0;
+ return string;
+}
+
+bool scan_mp3_file(QString& szFileName,mp3info * i)
+{
+ //memset(i,0,sizeof(mp3info));
+ resetmp3infoStruct(i);
+
+
+ i->filename = "text";
+ i->file = fopen(QTextCodec::codecForLocale()->fromUnicode(i->filename).data(),"rb");
+ if(!i->file)return false;
+
+ get_mp3_info(i);
+
+ fclose(i->file);
+
+ return (i->id3_isvalid);
+}
+