/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * * $Id$ * * Copyright (C) 2007 Dave Chapman * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include #include #include #include #include #include #include "id3.h" #include "debug.h" #include "rbunicode.h" #include "metadata_common.h" #include "system.h" #include /* TODO: Just read the GUIDs into a 16-byte array, and use memcmp to compare */ struct guid_s { uint32_t v1; uint16_t v2; uint16_t v3; uint8_t v4[8]; }; typedef struct guid_s guid_t; struct asf_object_s { guid_t guid; uint64_t size; uint64_t datalen; }; typedef struct asf_object_s asf_object_t; enum asf_error_e { ASF_ERROR_INTERNAL = -1, /* incorrect input to API calls */ ASF_ERROR_OUTOFMEM = -2, /* some malloc inside program failed */ ASF_ERROR_EOF = -3, /* unexpected end of file */ ASF_ERROR_IO = -4, /* error reading or writing to file */ ASF_ERROR_INVALID_LENGTH = -5, /* length value conflict in input data */ ASF_ERROR_INVALID_VALUE = -6, /* other value conflict in input data */ ASF_ERROR_INVALID_OBJECT = -7, /* ASF object missing or in wrong place */ ASF_ERROR_OBJECT_SIZE = -8, /* invalid ASF object size (too small) */ ASF_ERROR_SEEKABLE = -9, /* file not seekable */ ASF_ERROR_SEEK = -10 /* file is seekable but seeking failed */ }; static const guid_t asf_guid_null = {0x00000000, 0x0000, 0x0000, {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00}}; /* top level object guids */ static const guid_t asf_guid_header = {0x75B22630, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}}; static const guid_t asf_guid_data = {0x75B22636, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}}; static const guid_t asf_guid_index = {0x33000890, 0xE5B1, 0x11CF, {0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB}}; /* header level object guids */ static const guid_t asf_guid_file_properties = {0x8cabdca1, 0xa947, 0x11cf, {0x8E, 0xe4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}}; static const guid_t asf_guid_stream_properties = {0xB7DC0791, 0xA9B7, 0x11CF, {0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65}}; static const guid_t asf_guid_content_description = {0x75B22633, 0x668E, 0x11CF, {0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C}}; static const guid_t asf_guid_extended_content_description = {0xD2D0A440, 0xE307, 0x11D2, {0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5E, 0xA8, 0x50}}; /* stream type guids */ static const guid_t asf_guid_stream_type_audio = {0xF8699E40, 0x5B4D, 0x11CF, {0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B}}; static int asf_guid_match(const guid_t *guid1, const guid_t *guid2) { if((guid1->v1 != guid2->v1) || (guid1->v2 != guid2->v2) || (guid1->v3 != guid2->v3) || (memcmp(guid1->v4, guid2->v4, 8))) { return 0; } return 1; } /* Read the 16 byte GUID from a file */ static void asf_readGUID(int fd, guid_t* guid) { read_uint32le(fd, &guid->v1); read_uint16le(fd, &guid->v2); read_uint16le(fd, &guid->v3); read(fd, guid->v4, 8); } static void asf_read_object_header(asf_object_t *obj, int fd) { asf_readGUID(fd, &obj->guid); read_uint64le(fd, &obj->size); obj->datalen = 0; } /* Parse an integer from the extended content object - we always convert to an int, regardless of native format. */ static int asf_intdecode(int fd, int type, int length) { uint16_t tmp16; uint32_t tmp32; uint64_t tmp64; if (type==3) { read_uint32le(fd, &tmp32); lseek(fd,length - 4,SEEK_CUR); return (int)tmp32; } else if (type==4) { read_uint64le(fd, &tmp64); lseek(fd,length - 8,SEEK_CUR); return (int)tmp64; } else if (type == 5) { read_uint16le(fd, &tmp16); lseek(fd,length - 2,SEEK_CUR); return (int)tmp16; } return 0; } /* Decode a LE utf16 string from a disk buffer into a fixed-sized utf8 buffer. */ static void asf_utf16LEdecode(int fd, uint16_t utf16bytes, unsigned char **utf8, int* utf8bytes ) { unsigned long ucs; int n; unsigned char utf16buf[256]; unsigned char* utf16 = utf16buf; unsigned char* newutf8; n = read(fd, utf16buf, MIN(sizeof(utf16buf), utf16bytes)); utf16bytes -= n; while (n > 0) { /* Check for a surrogate pair */ if (utf16[1] >= 0xD8 && utf16[1] < 0xE0) { if (n < 4) { /* Run out of utf16 bytes, read some more */ utf16buf[0] = utf16[0]; utf16buf[1] = utf16[1]; n = read(fd, utf16buf + 2, MIN(sizeof(utf16buf)-2, utf16bytes)); utf16 = utf16buf; utf16bytes -= n; n += 2; } if (n < 4) { /* Truncated utf16 string, abort */ break; } ucs = 0x10000 + ((utf16[0] << 10) | ((utf16[1] - 0xD8) << 18) | utf16[2] | ((utf16[3] - 0xDC) << 8)); utf16 += 4; n -= 4; } else { ucs = (utf16[0] | (utf16[1] << 8)); utf16 += 2; n -= 2; } if (*utf8bytes > 6) { newutf8 = utf8encode(ucs, *utf8); *utf8bytes -= (newutf8 - *utf8); *utf8 += (newutf8 - *utf8); } /* We have run out of utf16 bytes, read more if available */ if ((n == 0) && (utf16bytes > 0)) { n = read(fd, utf16buf, MIN(sizeof(utf16buf), utf16bytes)); utf16 = utf16buf; utf16bytes -= n; } } *utf8[0] = 0; --*utf8bytes; if (utf16bytes > 0) { /* Skip any remaining bytes */ lseek(fd, utf16bytes, SEEK_CUR); } return; } static int asf_parse_header(int fd, struct mp3entry* id3, asf_waveformatex_t* wfx) { asf_object_t current; asf_object_t header; uint64_t datalen; int i; int fileprop = 0; uint64_t play_duration; uint16_t flags; uint32_t subobjects; uint8_t utf8buf[512]; int id3buf_remaining = sizeof(id3->id3v2buf) + sizeof(id3->id3v1buf); unsigned char* id3buf = (unsigned char*)id3->id3v2buf; asf_read_object_header((asf_object_t *) &header, fd); //DEBUGF("header.size=%d\n",(int)header.size); if (header.size < 30) { /* invalid size for header object */ return ASF_ERROR_OBJECT_SIZE; } read_uint32le(fd, &subobjects); /* Two reserved bytes - do we need to read them? */ lseek(fd, 2, SEEK_CUR); //DEBUGF("Read header - size=%d, subobjects=%d\n",(int)header.size, (int)subobjects); if (subobjects > 0) { header.datalen = header.size - 30; /* TODO: Check that we have datalen bytes left in the file */ datalen = header.datalen; for (i=0; i<(int)subobjects; i++) { //DEBUGF("Parsing header object %d - datalen=%d\n",i,(int)datalen); if (datalen < 24) { //DEBUGF("not enough data for reading object\n"); break; } asf_read_object_header(¤t, fd); if (current.size > datalen || current.size < 24) { //DEBUGF("invalid object size - current.size=%d, datalen=%d\n",(int)current.size,(int)datalen); break; } if (asf_guid_match(¤t.guid, &asf_guid_file_properties)) { if (current.size < 104) return ASF_ERROR_OBJECT_SIZE; if (fileprop) { /* multiple file properties objects not allowed */ return ASF_ERROR_INVALID_OBJECT; } fileprop = 1; /* All we want is the play duration - uint64_t at offset 40 */ lseek(fd, 40, SEEK_CUR); read_uint64le(fd, &play_duration); id3->length = play_duration / 10000; //DEBUGF("****** length = %lums\n", id3->length); /* Read the packet size - uint32_t at offset 68 */ lseek(fd, 20, SEEK_CUR); read_uint32le(fd, &wfx->packet_size); /* Skip bytes remaining in object */ lseek(fd, current.size - 24 - 72, SEEK_CUR); } else if (asf_guid_match(¤t.guid, &asf_guid_stream_properties)) { guid_t guid; uint32_t propdatalen; if (current.size < 78) return ASF_ERROR_OBJECT_SIZE; #if 0 asf_byteio_getGUID(&guid, current->data); datalen = asf_byteio_getDWLE(current->data + 40); flags = asf_byteio_getWLE(current->data + 48); #endif asf_readGUID(fd, &guid); lseek(fd, 24, SEEK_CUR); read_uint32le(fd, &propdatalen); lseek(fd, 4, SEEK_CUR); read_uint16le(fd, &flags); if (!asf_guid_match(&guid, &asf_guid_stream_type_audio)) { //DEBUGF("Found stream properties for non audio stream, skipping\n"); lseek(fd,current.size - 24 - 50,SEEK_CUR); } else if (wfx->audiostream == -1) { lseek(fd, 4, SEEK_CUR); //DEBUGF("Found stream properties for audio stream %d\n",flags&0x7f); if (propdatalen < 18) { return ASF_ERROR_INVALID_LENGTH; } #if 0 if (asf_byteio_getWLE(data + 16) > datalen - 16) { return ASF_ERROR_INVALID_LENGTH; } #endif read_uint16le(fd, &wfx->codec_id); read_uint16le(fd, &wfx->channels); read_uint32le(fd, &wfx->rate); read_uint32le(fd, &wfx->bitrate); wfx->bitrate *= 8; read_uint16le(fd, &wfx->blockalign); read_uint16le(fd, &wfx->bitspersample); read_uint16le(fd, &wfx->datalen); /* Round bitrate to the nearest kbit */ id3->bitrate = (wfx->bitrate + 500) / 1000; id3->frequency = wfx->rate; if (wfx->codec_id == ASF_CODEC_ID_WMAV1) { read(fd, wfx->data, 4); lseek(fd,current.size - 24 - 72 - 4,SEEK_CUR); wfx->audiostream = flags&0x7f; } else if (wfx->codec_id == ASF_CODEC_ID_WMAV2) { read(fd, wfx->data, 6); lseek(fd,current.size - 24 - 72 - 6,SEEK_CUR); wfx->audiostream = flags&0x7f; } else { lseek(fd,current.size - 24 - 72,SEEK_CUR); } } } else if (asf_guid_match(¤t.guid, &asf_guid_content_description)) { /* Object contains five 16-bit string lengths, followed by the five strings: title, artist, copyright, description, rating */ uint16_t strlength[5]; int i; //DEBUGF("Found GUID_CONTENT_DESCRIPTION - size=%d\n",(int)(current.size - 24)); /* Read the 5 string lengths - number of bytes included trailing zero */ for (i=0; i<5; i++) { read_uint16le(fd, &strlength[i]); //DEBUGF("strlength = %u\n",strlength[i]); } if (strlength[0] > 0) { /* 0 - Title */ id3->title = id3buf; asf_utf16LEdecode(fd, strlength[0], &id3buf, &id3buf_remaining); } if (strlength[1] > 0) { /* 1 - Artist */ id3->artist = id3buf; asf_utf16LEdecode(fd, strlength[1], &id3buf, &id3buf_remaining); } lseek(fd, strlength[2], SEEK_CUR); /* 2 - copyright */ if (strlength[3] > 0) { /* 3 - description */ id3->comment = id3buf; asf_utf16LEdecode(fd, strlength[3], &id3buf, &id3buf_remaining); } lseek(fd, strlength[4], SEEK_CUR); /* 4 - rating */ } else if (asf_guid_match(¤t.guid, &asf_guid_extended_content_description)) { uint16_t count; int i; int bytesleft = current.size - 24; //DEBUGF("Found GUID_EXTENDED_CONTENT_DESCRIPTION\n"); read_uint16le(fd, &count); bytesleft -= 2; //DEBUGF("extended metadata count = %u\n",count); for (i=0; i < count; i++) { uint16_t length, type; unsigned char* utf8 = utf8buf; int utf8length = 512; read_uint16le(fd, &length); asf_utf16LEdecode(fd, length, &utf8, &utf8length); bytesleft -= 2 + length; read_uint16le(fd, &type); read_uint16le(fd, &length); if (!strcmp("WM/TrackNumber",utf8buf)) { if (type == 0) { id3->track_string = id3buf; asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining); id3->tracknum = atoi(id3->track_string); } else if ((type >=2) && (type <= 5)) { id3->tracknum = asf_intdecode(fd, type, length); } else { lseek(fd, length, SEEK_CUR); } } else if ((!strcmp("WM/Genre",utf8buf)) && (type == 0)) { id3->genre_string = id3buf; asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining); } else if ((!strcmp("WM/AlbumTitle",utf8buf)) && (type == 0)) { id3->album = id3buf; asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining); } else if ((!strcmp("WM/AlbumArtist",utf8buf)) && (type == 0)) { id3->albumartist = id3buf; asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining); } else if ((!strcmp("WM/Composer",utf8buf)) && (type == 0)) { id3->composer = id3buf; asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining); } else if (!strcmp("WM/Year",utf8buf)) { if (type == 0) { id3->year_string = id3buf; asf_utf16LEdecode(fd, length, &id3buf, &id3buf_remaining); id3->year = atoi(id3->year_string); } else if ((type >=2) && (type <= 5)) { id3->year = asf_intdecode(fd, type, length); } else { lseek(fd, length, SEEK_CUR); } } else { lseek(fd, length, SEEK_CUR); } bytesleft -= 4 + length; } lseek(fd, bytesleft, SEEK_CUR); } else { //DEBUGF("Skipping %d bytes of object\n",(int)(current.size - 24)); lseek(fd,current.size - 24,SEEK_CUR); } //DEBUGF("Parsed object - size = %d\n",(int)current.size); datalen -= current.size; } if (i != (int)subobjects || datalen != 0) { //DEBUGF("header data doesn't match given subobject count\n"); return ASF_ERROR_INVALID_VALUE; } //DEBUGF("%d subobjects read successfully\n", i); } #if 0 tmp = asf_parse_header_validate(file, &header); if (tmp < 0) { /* header read ok but doesn't validate correctly */ return tmp; } #endif //DEBUGF("header validated correctly\n"); return 0; } bool get_asf_metadata(int fd, struct mp3entry* id3) { int res; asf_object_t obj; asf_waveformatex_t wfx; wfx.audiostream = -1; res = asf_parse_header(fd, id3, &wfx); if (res < 0) { DEBUGF("ASF: parsing error - %d\n",res); return false; } if (wfx.audiostream == -1) { DEBUGF("ASF: No WMA streams found\n"); return false; } if (wfx.bitrate < 20000) { DEBUGF("ASF: < 20kbps files not supported\n"); return false; } asf_read_object_header(&obj, fd); if (!asf_guid_match(&obj.guid, &asf_guid_data)) { DEBUGF("ASF: No data object found\n"); return false; } /* Store the current file position - no need to parse the header again in the codec. The +26 skips the rest of the data object header. */ id3->first_frame_offset = lseek(fd, 0, SEEK_CUR) + 26; /* We copy the wfx struct to the MP3 TOC field in the id3 struct so the codec doesn't need to parse the header object again */ memcpy(id3->toc, &wfx, sizeof(wfx)); return true; }