diff options
Diffstat (limited to 'components/music/id3_frame.c')
| -rw-r--r-- | components/music/id3_frame.c | 534 |
1 files changed, 0 insertions, 534 deletions
diff --git a/components/music/id3_frame.c b/components/music/id3_frame.c deleted file mode 100644 index 4fa77e0cd..000000000 --- a/components/music/id3_frame.c +++ /dev/null @@ -1,534 +0,0 @@ -/********************************************************************* - * - * Copyright (C) 1999-2000, Espen Skoglund - * Department of Computer Science, University of Tromsų - * - * Filename: id3_frame.c - * Description: Code for handling ID3 frames. - * Author: Espen Skoglund <espensk@stud.cs.uit.no> - * Created at: Fri Feb 5 23:47:08 1999 - * - * $Id$ - * - * 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. - * - ********************************************************************/ -#if HAVE_LIBZ -#include <zlib.h> -#endif -#include <glib.h> -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <stdarg.h> - -#include "id3.h" -#include "id3_header.h" - -/* - * Description of all valid ID3v2 frames. - */ -static id3_framedesc_t Framedesc[] = { - { ID3_AENC, "AENC", "Audio encryption" }, - { ID3_APIC, "APIC", "Attached picture" }, - - { ID3_COMM, "COMM", "Comments" }, - { ID3_COMR, "COMR", "Commercial frame" }, - - { ID3_ENCR, "ENCR", "Encryption method registration" }, - { ID3_EQUA, "EQUA", "Equalization" }, - { ID3_ETCO, "ETCO", "Event timing codes" }, - - { ID3_GEOB, "GEOB", "General encapsulated object" }, - { ID3_GRID, "GRID", "Group identification registration" }, - - { ID3_IPLS, "IPLS", "Involved people list" }, - - { ID3_LINK, "LINK", "Linked information" }, - - { ID3_MCDI, "MCDI", "Music CD identifier" }, - { ID3_MLLT, "MLLT", "MPEG location lookup table" }, - - { ID3_OWNE, "OWNE", "Ownership frame" }, - - { ID3_PRIV, "PRIV", "Private frame" }, - { ID3_PCNT, "PCNT", "Play counter" }, - { ID3_POPM, "POPM", "Popularimeter" }, - { ID3_POSS, "POSS", "Position synchronisation frame" }, - - { ID3_RBUF, "RBUF", "Recommended buffer size" }, - { ID3_RVAD, "RVAD", "Relative volume adjustment" }, - { ID3_RVRB, "RVRB", "Reverb" }, - - { ID3_SYLT, "SYLT", "Synchronized lyric/text" }, - { ID3_SYTC, "SYTC", "Synchronized tempo codes" }, - - { ID3_TALB, "TALB", "Album/Movie/Show title" }, - { ID3_TBPM, "TBPM", "BPM (beats per minute)" }, - { ID3_TCOM, "TCOM", "Composer" }, - { ID3_TCON, "TCON", "Content type" }, - { ID3_TCOP, "TCOP", "Copyright message" }, - { ID3_TDAT, "TDAT", "Date" }, - { ID3_TDLY, "TDLY", "Playlist delay" }, - { ID3_TENC, "TENC", "Encoded by" }, - { ID3_TEXT, "TEXT", "Lyricist/Text writer" }, - { ID3_TFLT, "TFLT", "File type" }, - { ID3_TIME, "TIME", "Time" }, - { ID3_TIT1, "TIT1", "Content group description" }, - { ID3_TIT2, "TIT2", "Title/songname/content description" }, - { ID3_TIT3, "TIT3", "Subtitle/Description refinement" }, - { ID3_TKEY, "TKEY", "Initial key" }, - { ID3_TLAN, "TLAN", "Language(s)" }, - { ID3_TLEN, "TLEN", "Length" }, - { ID3_TMED, "TMED", "Media type" }, - { ID3_TOAL, "TOAL", "Original album/movie/show title" }, - { ID3_TOFN, "TOFN", "Original filename" }, - { ID3_TOLY, "TOLY", "Original lyricist(s)/text writer(s)" }, - { ID3_TOPE, "TOPE", "Original artist(s)/performer(s)" }, - { ID3_TORY, "TORY", "Original release year" }, - { ID3_TOWN, "TOWN", "File owner/licensee" }, - { ID3_TPE1, "TPE1", "Lead performer(s)/Soloist(s)" }, - { ID3_TPE2, "TPE2", "Band/orchestra/accompaniment" }, - { ID3_TPE3, "TPE3", "Conductor/performer refinement" }, - { ID3_TPE4, "TPE4", "Interpreted, remixed, or otherwise modified by" }, - { ID3_TPOS, "TPOS", "Part of a set" }, - { ID3_TPUB, "TPUB", "Publisher" }, - { ID3_TRCK, "TRCK", "Track number/Position in set" }, - { ID3_TRDA, "TRDA", "Recording dates" }, - { ID3_TRSN, "TRSN", "Internet radio station name" }, - { ID3_TRSO, "TRSO", "Internet radio station owner" }, - { ID3_TSIZ, "TSIZ", "Size" }, - { ID3_TSRC, "TSRC", "ISRC (international standard recording code)" }, - { ID3_TSSE, "TSSE", "Software/Hardware and settings used for encoding" }, - { ID3_TYER, "TYER", "Year" }, - { ID3_TXXX, "TXXX", "User defined text information frame" }, - - { ID3_UFID, "UFID", "Unique file identifier" }, - { ID3_USER, "USER", "Terms of use" }, - { ID3_USLT, "USLT", "Unsychronized lyric/text transcription" }, - - { ID3_WCOM, "WCOM", "Commercial information" }, - { ID3_WCOP, "WCOP", "Copyright/Legal information" }, - { ID3_WOAF, "WOAF", "Official audio file webpage" }, - { ID3_WOAR, "WOAR", "Official artist/performer webpage" }, - { ID3_WOAS, "WOAS", "Official audio source webpage" }, - { ID3_WORS, "WORS", "Official internet radio station homepage" }, - { ID3_WPAY, "WPAY", "Payment" }, - { ID3_WPUB, "WPUB", "Publishers official webpage" }, - { ID3_WXXX, "WXXX", "User defined URL link frame" }, -}; - - -/* - * Function id3_read_frame (id3) - * - * Read next frame from the indicated ID3 tag. Return 0 upon - * success, or -1 if an error occured. - * - */ -int id3_read_frame(id3_t *id3) -{ - id3_framehdr_t *framehdr; - id3_frame_t *frame; - guint32 id; - void *p; - int i; - - /* - * Read frame header. - */ - framehdr = id3->id3_read( id3, NULL, sizeof(*framehdr) ); - if ( framehdr == NULL ) - return -1; - - /* - * If we encounter an invalid frame id, we assume that there is - * some padding in the header. We just skip the rest of the ID3 - * tag. - */ - i = *((guint8 *) &framehdr->fh_id); - if ( !((i >= '0' && i <= '9') || (i >= 'A' && i <= 'Z')) ) { - id3->id3_seek( id3, id3->id3_tagsize - id3->id3_pos ); - return 0; - } - id = g_ntohl( framehdr->fh_id ); - - /* - * Allocate frame. - */ - frame = malloc( sizeof(*frame) ); - if ( frame == NULL ) - return -1; - - frame->fr_owner = id3; - frame->fr_size = g_ntohl(framehdr->fh_size); - frame->fr_flags = g_ntohs(framehdr->fh_flags); - frame->fr_encryption = 0; - frame->fr_grouping = 0; - frame->fr_desc = NULL; - frame->fr_altered = 0; - frame->fr_data = NULL; - - /* - * Determine the type of the frame. - */ - for ( i = 0; - i < (int)(sizeof(Framedesc) / sizeof(id3_framedesc_t)); - i++ ) { - - if ( Framedesc[i].fd_id == id ) { - /* - * Insert frame into linked list. - */ - frame->fr_next = NULL; - if ( id3->id3_frame ) { - id3->id3_tail->fr_next = frame; - } else { - id3->id3_frame = frame; - } - id3->id3_tail = frame; - id3->id3_numframes++; - - /* - * Initialize frame. - */ - frame->fr_desc = Framedesc + i; - - /* - * When allocating memory to hold a text frame, we - * allocate 2 extra byte. This simplifies retrieval of - * text strings. - */ - frame->fr_data = malloc( frame->fr_size + - (frame->fr_desc->fd_idstr[0] == 'T' || - frame->fr_desc->fd_idstr[0] == 'W' ? - 2 : 0) ); - if ( frame->fr_data == NULL ) { - free( frame ); - return -1; - } - p = id3->id3_read(id3, frame->fr_data, frame->fr_size ); - if ( p == NULL ) { - free( frame->fr_data ); - free( frame ); - return -1; - } - - /* - * Null-terminate text frames. - */ - if ( frame->fr_desc->fd_idstr[0] == 'T' || - frame->fr_desc->fd_idstr[0] == 'W' ) { - ((char *) frame->fr_data)[frame->fr_size] = 0; - ((char *) frame->fr_data)[frame->fr_size+1] = 0; - } - - break; - } - } - - /* - * Check if frame had a valid id. - */ - if ( frame->fr_desc == NULL ) { - /* - * No. Ignore the frame. - */ - return 0; - } - - - if ( frame->fr_flags & ID3_FHFLAG_COMPRESS ) { - /* - * Frame is compressed using zlib. Fetch the size of the - * decompressed data. - */ - frame->fr_size_z = frame->fr_size; - frame->fr_size = g_ntohl( *((guint32 *) frame->fr_data) ); - frame->fr_data_z = GINT_TO_POINTER ((GPOINTER_TO_INT (frame->fr_data) + 4)); - frame->fr_data = NULL; - } else { - /* - * Frame is not compressed. - */ - frame->fr_size_z = 0; - frame->fr_data_z = NULL; - } - - /* - * If frame is encrypted, we have one extra byte in the header. - */ - if ( frame->fr_flags & ID3_FHFLAG_ENCRYPT ) { - if ( frame->fr_data_z ) - frame->fr_data_z = (char *) frame->fr_data_z + 1; - else - frame->fr_data = (char *) frame->fr_data + 1; - } - - /* - * If frame has grouping identity, we have one extra byte in the - * header. - */ - if ( frame->fr_flags & ID3_FHFLAG_GROUP ) { - if ( frame->fr_data_z ) - frame->fr_data_z = (char *) frame->fr_data + 1; - else - frame->fr_data = (char *) frame->fr_data + 1; - } - - return 0; -} - - -/* - * Function id3_get_frame (id3, type, num) - * - * Search in the list of frames for the ID3-tag, and return a frame - * of the indicated type. If tag contains several frames of the - * indicated type, the third argument tells which of the frames to - * return. - * - */ -id3_frame_t *id3_get_frame(id3_t *id3, guint32 type, int num) -{ - id3_frame_t *fr = id3->id3_frame; - - while ( fr != NULL ) { - if (fr->fr_desc && fr->fr_desc->fd_id == type ) - { - if ( --num <= 0 ) - break; - } - fr = fr->fr_next; - } - return fr; -} - - -/* - * Function id3_decompress_frame (frame) - * - * Uncompress the indicated frame. Return 0 upon success, or -1 if - * an error occured. - * - */ -int id3_decompress_frame(id3_frame_t *frame) -{ -#ifdef HAVE_LIBZ - z_stream z; - int r; - - /* - * Allocate memory to hold uncompressed frame. - */ - frame->fr_data = malloc( frame->fr_size + - (frame->fr_desc->fd_idstr[0] == 'T' || - frame->fr_desc->fd_idstr[0] == 'W' ? 2 : 0) ); - if ( frame->fr_data == NULL ) { - id3_error( frame->fr_owner, "malloc - no memory" ); - return -1; - } - - /* - * Initialize zlib. - */ - z.next_in = (Bytef *) frame->fr_data_z; - z.avail_in = frame->fr_size_z; - z.zalloc = NULL; - z.zfree = NULL; - z.opaque = NULL; - - r = inflateInit( &z ); - switch ( r ) { - case Z_OK: - break; - case Z_MEM_ERROR: - id3_error( frame->fr_owner, "zlib - no memory" ); - goto Error_init; - case Z_VERSION_ERROR: - id3_error( frame->fr_owner, "zlib - invalid version" ); - goto Error_init; - default: - id3_error( frame->fr_owner, "zlib - unknown error" ); - goto Error_init; - } - - /* - * Decompress frame. - */ - z.next_out = (Bytef *) frame->fr_data; - z.avail_out = frame->fr_size; - r = inflate( &z, Z_SYNC_FLUSH ); - switch ( r ) { - case Z_STREAM_END: - break; - case Z_OK: - if ( z.avail_in == 0 ) - /* - * This should not be possible with a correct stream. - * We will be nice however, and try to go on. - */ - break; - id3_error( frame->fr_owner, "zlib - buffer exhausted" ); - goto Error_inflate; - default: - id3_error( frame->fr_owner, "zlib - unknown error" ); - goto Error_inflate; - } - - r = inflateEnd( &z ); - if ( r != Z_OK ) - id3_error( frame->fr_owner, "zlib - inflateEnd error" ); - - /* - * Null-terminate text frames. - */ - if ( frame->fr_desc->fd_idstr[0] == 'T' || - frame->fr_desc->fd_idstr[0] == 'W' ) { - ((char *) frame->fr_data)[frame->fr_size] = 0; - ((char *) frame->fr_data)[frame->fr_size+1] = 0; - } - - return 0; - - /* - * Cleanup code. - */ - Error_inflate: - r = inflateEnd( &z ); - Error_init: - free( frame->fr_data ); - frame->fr_data = NULL; -#endif - return -1; -} - - -/* - * Function id3_delete_frame (frame) - * - * Remove frame from ID3 tag and release memory ocupied by it. - * - */ -int id3_delete_frame(id3_frame_t *frame) -{ - id3_frame_t *fr = frame->fr_owner->id3_frame; - id3_frame_t *prev = NULL; - int ret; - - /* - * Search for frame in list. - */ - while ( fr != frame && fr != NULL ) { - prev = fr; - fr = fr->fr_next; - } - - if ( fr == NULL ) { - /* - * Frame does not exist in frame list. - */ - ret = -1; - - } else { - /* - * Remove frame from frame list. - */ - if ( prev == NULL ) { - frame->fr_owner->id3_frame = frame->fr_next; - } else { - prev->fr_next = frame->fr_next; - } - if ( frame->fr_owner->id3_tail == frame ) - frame->fr_owner->id3_tail = prev; - - frame->fr_owner->id3_numframes--; - frame->fr_owner->id3_altered = 1; - ret = 0; - } - - /* - * Release memory occupied by frame. - */ - if ( frame->fr_data ) - free( frame->fr_data ); - if ( frame->fr_data_z ) - free( frame->fr_data_z ); - free( frame ); - - return ret; -} - - -/* - * Function id3_add_frame (id3, type) - * - * Add a new frame to the ID3 tag. Return a pointer to the new - * frame, or NULL if an error occured. - * - */ -id3_frame_t *id3_add_frame(id3_t *id3, guint32 type) -{ - id3_frame_t *frame; - int i; - - /* - * Allocate frame. - */ - frame = malloc( sizeof(*frame) ); - if ( frame == NULL ) - return NULL; - - /* - * Initialize frame - */ - frame->fr_owner = id3; - frame->fr_desc = NULL; - frame->fr_flags = 0; - frame->fr_encryption = 0; - frame->fr_grouping = 0; - frame->fr_altered = 0; - frame->fr_data = frame->fr_data_z = NULL; - frame->fr_size = frame->fr_size_z = 0; - - /* - * Try finding the correct frame descriptor. - */ - for ( i = 0; - i < (int)(sizeof(Framedesc) / sizeof(id3_framedesc_t)); - i++ ) { - if ( Framedesc[i].fd_id == type ) { - frame->fr_desc = &Framedesc[i]; - break; - } - } - - /* - * Insert frame into linked list. - */ - frame->fr_next = NULL; - if ( id3->id3_frame ) { - id3->id3_tail->fr_next = frame; - } else { - id3->id3_frame = frame; - } - id3->id3_tail = frame; - id3->id3_numframes++; - id3->id3_altered = 1; - - return frame; -} - - |