static int _get_wavtags(char *filename, struct song_metadata *psong) { int fd; uint32_t len; unsigned char hdr[12]; unsigned char fmt[16]; //uint32_t chunk_data_length; uint32_t format_data_length = 0; uint32_t compression_code = 0; uint32_t channel_count = 0; uint32_t sample_rate = 0; uint32_t sample_bit_length = 0; uint32_t bit_rate; uint32_t data_length = 0; uint32_t sec, ms; uint32_t current_offset; uint32_t block_len; //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Getting WAV file info\n"); if(!(fd = open(filename, O_RDONLY))) { DPRINTF(E_WARN, L_SCANNER, "Could not create file handle\n"); return -1; } len = 12; if(!(len = read(fd, hdr, len)) || (len != 12)) { DPRINTF(E_WARN, L_SCANNER, "Could not read wav header from %s\n", filename); close(fd); return -1; } /* I've found some wav files that have INFO tags * in them... */ if(strncmp((char*)hdr + 0, "RIFF", 4) || strncmp((char*)hdr + 8, "WAVE", 4)) { DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename); close(fd); return -1; } //chunk_data_length = GET_WAV_INT32(hdr + 4); /* now, walk through the chunks */ current_offset = 12; while(current_offset + 8 < psong->file_size) { len = 8; if(!(len = read(fd, hdr, len)) || (len != 8)) { close(fd); DPRINTF(E_WARN, L_SCANNER, "Error reading block: %s\n", filename); return -1; } current_offset += 8; block_len = GET_WAV_INT32(hdr + 4); //DEBUG DPRINTF(E_DEBUG, L_SCANNER, "Read block %02x%02x%02x%02x (%c%c%c%c) of " // "size 0x%08x\n",hdr[0],hdr[1],hdr[2],hdr[3], // isprint(hdr[0]) ? hdr[0] : '?', // isprint(hdr[1]) ? hdr[1] : '?', // isprint(hdr[2]) ? hdr[2] : '?', // isprint(hdr[3]) ? hdr[3] : '?', // block_len); if(block_len < 0) { close(fd); DPRINTF(E_WARN, L_SCANNER, "Bad block len: %s\n", filename); return -1; } if(strncmp((char*)&hdr, "fmt ", 4) == 0) { //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'fmt ' header\n"); len = 16; if(!read(fd, fmt, len) || (len != 16)) { close(fd); DPRINTF(E_WARN, L_SCANNER, "Bad .wav file: can't read fmt: %s\n", filename); return -1; } format_data_length = block_len; compression_code = GET_WAV_INT16(fmt); channel_count = GET_WAV_INT16(fmt + 2); sample_rate = GET_WAV_INT32(fmt + 4); sample_bit_length = GET_WAV_INT16(fmt + 14); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Compression code: %d\n",compression_code); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Channel count: %d\n",channel_count); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample Rate: %d\n",sample_rate); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample bit length %d\n",sample_bit_length); } else if(strncmp((char*)&hdr, "data", 4) == 0) { //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'data' header\n"); data_length = block_len; goto next_block; } else if(strncmp((char*)&hdr, "LIST", 4) == 0) { char *tags; char *p; int off; uint32_t taglen; char **m; len = GET_WAV_INT32(hdr + 4); if(len > 65536 || len < 9) goto next_block; tags = malloc(len+1); if(!tags) goto next_block; if(read(fd, tags, len) < len || strncmp(tags, "INFO", 4) != 0) { free(tags); goto next_block; } tags[len] = '\0'; off = 4; p = tags + off; while(off < len - 8) { taglen = GET_WAV_INT32(p + 4); //DEBUG DPRINTF(E_DEBUG, L_SCANNER, "%.*s: %.*s (%d)\n", 4, p, taglen, p + 8, taglen); m = NULL; if (taglen > 2048) { DPRINTF(E_WARN, L_SCANNER, "Ignoring long tag [%.*s] in %s\n", 4, p+8, filename); } else if(strncmp(p, "INAM", 4) == 0) m = &(psong->title); else if(strncmp(p, "IALB", 4) == 0 || strncmp(p, "IPRD", 4) == 0) m = &(psong->album); else if(strncmp(p, "IGRE", 4) == 0 || strncmp(p, "IGNR", 4) == 0) m = &(psong->genre); else if(strncmp(p, "ICMT", 4) == 0) m = &(psong->comment); else if(strncmp(p, "IART", 4) == 0) m = &(psong->contributor[ROLE_TRACKARTIST]); else if(strncmp(p, "IAAR", 4) == 0) m = &(psong->contributor[ROLE_ALBUMARTIST]); else if(strncmp(p, "ICOM", 4) == 0 || strncmp(p, "IMUS", 4) == 0) m = &(psong->contributor[ROLE_COMPOSER]); else if(strncasecmp(p, "ITRK", 4) == 0) psong->track = atoi(p + 8); else if(strncmp(p, "ICRD", 4) == 0 || strncmp(p, "IYER", 4) == 0) psong->year = atoi(p + 8); if(m) { *m = malloc(taglen + 1); strncpy(*m, p + 8, taglen); (*m)[taglen] = '\0'; } p += taglen + 8; off += taglen + 8; /* Handle some common WAV file malformations */ while (*p == '\0' && off < len) { p++; off++; } } free(tags); } next_block: lseek(fd, current_offset + block_len, SEEK_SET); current_offset += block_len; } close(fd); if(((format_data_length != 16) && (format_data_length != 18)) || (compression_code != 1) || (channel_count < 1)) { DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename); return -1; } if( !data_length ) data_length = psong->file_size - 44; bit_rate = sample_rate * channel_count * ((sample_bit_length + 7) / 8) * 8; psong->bitrate = bit_rate; psong->samplerate = sample_rate; psong->channels = channel_count; //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Data length: %d\n", data_length); sec = data_length / (bit_rate / 8); ms = ((data_length % (bit_rate / 8)) * 1000) / (bit_rate / 8); psong->song_length = (sec * 1000) + ms; //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Song length: %d\n", psong->song_length); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Bit rate: %d\n", psong->bitrate); /* Upon further review, WAV files should be little-endian, and DLNA requires the LPCM profile to be big-endian. asprintf(&(psong->mime), "audio/L16;rate=%d;channels=%d", psong->samplerate, psong->channels); */ return 0; }
static int _get_wavtags(char *filename, struct song_metadata *psong) { int fd; uint32_t len; unsigned char hdr[12]; unsigned char fmt[16]; uint32_t chunk_data_length; uint32_t format_data_length = 0; uint32_t compression_code = 0; uint32_t channel_count = 0; uint32_t sample_rate = 0; uint32_t sample_bit_length = 0; uint32_t bit_rate; uint32_t data_length = 0; uint32_t sec, ms; uint32_t current_offset; uint32_t block_len; int found_fmt = 0; int found_data = 0; //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Getting WAV file info\n"); if(!(fd = open(filename, O_RDONLY))) { DPRINTF(E_WARN, L_SCANNER, "Could not create file handle\n"); return -1; } len = 12; if(!(len = read(fd, hdr, len)) || (len != 12)) { DPRINTF(E_WARN, L_SCANNER, "Could not read wav header from %s\n", filename); close(fd); return -1; } /* I've found some wav files that have INFO tags * in them... */ if(strncmp((char*)hdr + 0, "RIFF", 4) || strncmp((char*)hdr + 8, "WAVE", 4)) { DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename); close(fd); return -1; } chunk_data_length = GET_WAV_INT32(hdr + 4); /* now, walk through the chunks */ current_offset = 12; while(!found_fmt && !found_data) { len = 8; if(!(len = read(fd, hdr, len)) || (len != 8)) { close(fd); DPRINTF(E_WARN, L_SCANNER, "Error reading block: %s\n", filename); return -1; } block_len = GET_WAV_INT32(hdr + 4); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Read block %02x%02x%02x%02x (%c%c%c%c) of " // "size %08x\n",hdr[0],hdr[1],hdr[2],hdr[3], // hdr[0],hdr[1],hdr[2],hdr[3],block_len); if(block_len < 0) { close(fd); DPRINTF(E_WARN, L_SCANNER, "Bad block len: %s\n", filename); return -1; } if(strncmp((char*)&hdr, "fmt ", 4) == 0) { found_fmt = 1; //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'fmt ' header\n"); len = 16; if(!read(fd, fmt, len) || (len != 16)) { close(fd); DPRINTF(E_WARN, L_SCANNER, "Bad .wav file: can't read fmt: %s\n", filename); return -1; } format_data_length = block_len; compression_code = GET_WAV_INT16(fmt); channel_count = GET_WAV_INT16(fmt + 2); sample_rate = GET_WAV_INT32(fmt + 4); sample_bit_length = GET_WAV_INT16(fmt + 14); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Compression code: %d\n",compression_code); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Channel count: %d\n",channel_count); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample Rate: %d\n",sample_rate); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample bit length %d\n",sample_bit_length); } else if(strncmp((char*)&hdr, "data", 4) == 0) { //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'data' header\n"); data_length = block_len; found_data = 1; } lseek(fd, current_offset + block_len + 8, SEEK_SET); current_offset += block_len; } close(fd); if(((format_data_length != 16) && (format_data_length != 18)) || (compression_code != 1) || (channel_count < 1)) { DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename); return -1; } if( !data_length ) data_length = psong->file_size - 44; bit_rate = sample_rate * channel_count * ((sample_bit_length + 7) / 8) * 8; psong->bitrate = bit_rate; psong->samplerate = sample_rate; psong->channels = channel_count; //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Data length: %d\n", data_length); sec = data_length / (bit_rate / 8); ms = ((data_length % (bit_rate / 8)) * 1000) / (bit_rate / 8); psong->song_length = (sec * 1000) + ms; //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Song length: %d\n", psong->song_length); //DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Bit rate: %d\n", psong->bitrate); /* Upon further review, WAV files should be little-endian, and DLNA requires the LPCM profile to be big-endian. asprintf(&(psong->mime), "audio/L16;rate=%d;channels=%d", psong->samplerate, psong->channels); */ return 0; }