From 35f9e5b264fbc3d4e2dfb0b2f667a82cbb98787d Mon Sep 17 00:00:00 2001 From: Justin Maggard Date: Tue, 12 May 2009 01:23:39 +0000 Subject: [PATCH] * Add new WAV parsing files. --- tagutils/tagutils-wav.c | 178 ++++++++++++++++++++++++++++++++++++++++ tagutils/tagutils-wav.h | 24 ++++++ 2 files changed, 202 insertions(+) create mode 100644 tagutils/tagutils-wav.c create mode 100644 tagutils/tagutils-wav.h diff --git a/tagutils/tagutils-wav.c b/tagutils/tagutils-wav.c new file mode 100644 index 0000000..6f9f1a5 --- /dev/null +++ b/tagutils/tagutils-wav.c @@ -0,0 +1,178 @@ +//========================================================================= +// FILENAME : tagutils-wav.c +// DESCRIPTION : WAV metadata reader +//========================================================================= +// Copyright (c) 2009 NETGEAR, Inc. All Rights Reserved. +// based on software from Ron Pedde's FireFly Media Server project +//========================================================================= + +/* + * 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 + */ + +#define GET_WAV_INT32(p) ((((uint32_t)((p)[3])) << 24) | \ + (((uint32_t)((p)[2])) << 16) | \ + (((uint32_t)((p)[1])) << 8) | \ + (((uint32_t)((p)[0])))) + +#define GET_WAV_INT16(p) ((((uint32_t)((p)[1])) << 8) | \ + (((uint32_t)((p)[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); + + asprintf(&(psong->mime), "audio/L16;rate=%d;channels=%d", psong->samplerate, psong->channels); + return 0; +} + +static int +_get_wavfileinfo(char *filename, struct song_metadata *psong) +{ + psong->lossless = 1; + asprintf(&(psong->dlna_pn), "LPCM"); + + return 0; +} diff --git a/tagutils/tagutils-wav.h b/tagutils/tagutils-wav.h new file mode 100644 index 0000000..fc8ce97 --- /dev/null +++ b/tagutils/tagutils-wav.h @@ -0,0 +1,24 @@ +//========================================================================= +// FILENAME : tagutils-wav.h +// DESCRIPTION : WAV metadata reader +//========================================================================= +// Copyright (c) 2009- NETGEAR, Inc. All Rights Reserved. +//========================================================================= + +/* 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 + */ + +static int _get_wavfileinfo(char *file, struct song_metadata *psong); +static int _get_wavtags(char *file, struct song_metadata *psong);