* Add new WAV parsing files.
This commit is contained in:
Justin Maggard
parent
3e7a3cbfb5
commit
35f9e5b264
178
tagutils/tagutils-wav.c
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178
tagutils/tagutils-wav.c
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//=========================================================================
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// FILENAME : tagutils-wav.c
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// DESCRIPTION : WAV metadata reader
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//=========================================================================
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// Copyright (c) 2009 NETGEAR, Inc. All Rights Reserved.
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// based on software from Ron Pedde's FireFly Media Server project
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//=========================================================================
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/*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#define GET_WAV_INT32(p) ((((uint32_t)((p)[3])) << 24) | \
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(((uint32_t)((p)[2])) << 16) | \
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(((uint32_t)((p)[1])) << 8) | \
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(((uint32_t)((p)[0]))))
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#define GET_WAV_INT16(p) ((((uint32_t)((p)[1])) << 8) | \
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(((uint32_t)((p)[0]))))
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static int
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_get_wavtags(char *filename, struct song_metadata *psong)
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{
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int fd;
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uint32_t len;
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unsigned char hdr[12];
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unsigned char fmt[16];
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uint32_t chunk_data_length;
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uint32_t format_data_length = 0;
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uint32_t compression_code = 0;
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uint32_t channel_count = 0;
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uint32_t sample_rate = 0;
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uint32_t sample_bit_length = 0;
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uint32_t bit_rate;
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uint32_t data_length = 0;
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uint32_t sec, ms;
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uint32_t current_offset;
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uint32_t block_len;
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int found_fmt = 0;
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int found_data = 0;
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Getting WAV file info\n");
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if(!(fd = open(filename, O_RDONLY)))
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{
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DPRINTF(E_WARN, L_SCANNER, "Could not create file handle\n");
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return -1;
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}
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len = 12;
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if(!(len = read(fd, hdr, len)) || (len != 12))
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{
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DPRINTF(E_WARN, L_SCANNER, "Could not read wav header from %s\n", filename);
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close(fd);
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return -1;
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}
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/* I've found some wav files that have INFO tags
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* in them... */
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if(strncmp((char*)hdr + 0, "RIFF", 4) ||
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strncmp((char*)hdr + 8, "WAVE", 4))
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{
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DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename);
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close(fd);
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return -1;
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}
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chunk_data_length = GET_WAV_INT32(hdr + 4);
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/* now, walk through the chunks */
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current_offset = 12;
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while(!found_fmt && !found_data)
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{
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len = 8;
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if(!(len = read(fd, hdr, len)) || (len != 8))
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{
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close(fd);
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DPRINTF(E_WARN, L_SCANNER, "Error reading block: %s\n", filename);
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return -1;
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}
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block_len = GET_WAV_INT32(hdr + 4);
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Read block %02x%02x%02x%02x (%c%c%c%c) of "
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// "size %08x\n",hdr[0],hdr[1],hdr[2],hdr[3],
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// hdr[0],hdr[1],hdr[2],hdr[3],block_len);
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if(block_len < 0)
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{
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close(fd);
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DPRINTF(E_WARN, L_SCANNER, "Bad block len: %s\n", filename);
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return -1;
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}
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if(strncmp((char*)&hdr, "fmt ", 4) == 0)
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{
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found_fmt = 1;
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'fmt ' header\n");
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len = 16;
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if(!read(fd, fmt, len) || (len != 16))
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{
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close(fd);
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DPRINTF(E_WARN, L_SCANNER, "Bad .wav file: can't read fmt: %s\n",
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filename);
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return -1;
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}
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format_data_length = block_len;
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compression_code = GET_WAV_INT16(fmt);
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channel_count = GET_WAV_INT16(fmt + 2);
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sample_rate = GET_WAV_INT32(fmt + 4);
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sample_bit_length = GET_WAV_INT16(fmt + 14);
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Compression code: %d\n",compression_code);
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Channel count: %d\n",channel_count);
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample Rate: %d\n",sample_rate);
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Sample bit length %d\n",sample_bit_length);
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}
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else if(strncmp((char*)&hdr, "data", 4) == 0)
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{
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Found 'data' header\n");
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data_length = block_len;
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found_data = 1;
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}
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lseek(fd, current_offset + block_len + 8, SEEK_SET);
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current_offset += block_len;
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}
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close(fd);
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if(((format_data_length != 16) && (format_data_length != 18)) ||
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(compression_code != 1) ||
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(channel_count < 1))
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{
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DPRINTF(E_WARN, L_SCANNER, "Invalid wav header in %s\n", filename);
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return -1;
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}
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if( !data_length )
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data_length = psong->file_size - 44;
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bit_rate = sample_rate * channel_count * ((sample_bit_length + 7) / 8) * 8;
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psong->bitrate = bit_rate;
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psong->samplerate = sample_rate;
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psong->channels = channel_count;
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Data length: %d\n", data_length);
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sec = data_length / (bit_rate / 8);
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ms = ((data_length % (bit_rate / 8)) * 1000) / (bit_rate / 8);
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psong->song_length = (sec * 1000) + ms;
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Song length: %d\n", psong->song_length);
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//DEBUG DPRINTF(E_DEBUG,L_SCANNER,"Bit rate: %d\n", psong->bitrate);
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asprintf(&(psong->mime), "audio/L16;rate=%d;channels=%d", psong->samplerate, psong->channels);
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return 0;
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}
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static int
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_get_wavfileinfo(char *filename, struct song_metadata *psong)
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{
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psong->lossless = 1;
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asprintf(&(psong->dlna_pn), "LPCM");
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return 0;
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}
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24
tagutils/tagutils-wav.h
Normal file
24
tagutils/tagutils-wav.h
Normal file
@ -0,0 +1,24 @@
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//=========================================================================
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// FILENAME : tagutils-wav.h
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// DESCRIPTION : WAV metadata reader
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//=========================================================================
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// Copyright (c) 2009- NETGEAR, Inc. All Rights Reserved.
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//=========================================================================
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/* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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static int _get_wavfileinfo(char *file, struct song_metadata *psong);
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static int _get_wavtags(char *file, struct song_metadata *psong);
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