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Diffstat (limited to 'apps/metadata/wavpack.c')
| -rw-r--r-- | apps/metadata/wavpack.c | 160 |
1 files changed, 0 insertions, 160 deletions
diff --git a/apps/metadata/wavpack.c b/apps/metadata/wavpack.c deleted file mode 100644 index f2811df..0000000 --- a/apps/metadata/wavpack.c +++ /dev/null @@ -1,160 +0,0 @@ -/*************************************************************************** - * __________ __ ___. - * Open \______ \ ____ ____ | | _\_ |__ _______ ___ - * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / - * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < - * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ - * \/ \/ \/ \/ \/ - * $Id$ - * - * Copyright (C) 2007 David Bryant - * - * 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY - * KIND, either express or implied. - * - ****************************************************************************/ -#include <stdio.h> -#include <string.h> -#include <stdlib.h> -#include <ctype.h> -#include <inttypes.h> - -#include "system.h" -#include "metadata.h" -#include "metadata_common.h" -#include "metadata_parsers.h" -#include "logf.h" - -#define ID_UNIQUE 0x3f -#define ID_LARGE 0x80 -#define ID_SAMPLE_RATE 0x27 - -#define MONO_FLAG 4 -#define HYBRID_FLAG 8 - -static const long wavpack_sample_rates [] = -{ - 6000, 8000, 9600, 11025, 12000, 16000, 22050, 24000, - 32000, 44100, 48000, 64000, 88200, 96000, 192000 -}; - -/* A simple parser to read basic information from a WavPack file. This - * now works with self-extrating WavPack files and also will scan the - * metadata for non-standard sampling rates. This no longer fails on - * WavPack files containing floating-point audio data because these are - * now converted to standard Rockbox format in the decoder, and also - * handles the case where up to 15 non-audio blocks might occur at the - * beginning of the file. - */ - -bool get_wavpack_metadata(int fd, struct mp3entry* id3) -{ - /* Use the trackname part of the id3 structure as a temporary buffer */ - unsigned char* buf = (unsigned char *)id3->path; - uint32_t totalsamples = (uint32_t) -1; - int i; - - for (i = 0; i < 256; ++i) { - - /* at every 256 bytes into file, try to read a WavPack header */ - - if ((lseek(fd, i * 256, SEEK_SET) < 0) || (read(fd, buf, 32) < 32)) - return false; - - /* if valid WavPack 4 header version, break */ - - if (memcmp (buf, "wvpk", 4) == 0 && buf [9] == 4 && - (buf [8] >= 2 && buf [8] <= 0x10)) - break; - } - - if (i == 256) { - logf ("Not a WavPack file"); - return false; - } - - id3->vbr = true; /* All WavPack files are VBR */ - id3->filesize = filesize (fd); - - /* check up to 16 headers before we give up finding one with audio */ - - for (i = 0; i < 16; ++i) { - uint32_t meta_bytes = get_long_le(&buf [4]) - 24; - uint32_t trial_totalsamples = get_long_le(&buf[12]); - uint32_t blockindex = get_long_le(&buf[16]); - uint32_t blocksamples = get_long_le(&buf[20]); - uint32_t flags = get_long_le(&buf[24]); - - if (totalsamples == (uint32_t) -1 && blockindex == 0) - totalsamples = trial_totalsamples; - - if (blocksamples) { - int srindx = ((buf [26] >> 7) & 1) + ((buf [27] << 1) & 14); - - if (srindx == 15) { - uint32_t meta_size; - - id3->frequency = 44100; - - while (meta_bytes >= 6) { - if (read(fd, buf, 2) < 2) - break; - - if (buf [0] & ID_LARGE) { - if (read(fd, buf + 2, 2) < 2) - break; - - meta_size = (buf [1] << 1) + (buf [2] << 9) + (buf [3] << 17); - meta_bytes -= meta_size + 4; - } - else { - meta_size = buf [1] << 1; - meta_bytes -= meta_size + 2; - - if ((buf [0] & ID_UNIQUE) == ID_SAMPLE_RATE) { - if (meta_size == 4 && read(fd, buf + 2, 4) == 4) - id3->frequency = buf [2] + (buf [3] << 8) + (buf [4] << 16); - - break; - } - } - - if (meta_size > 0 && lseek(fd, meta_size, SEEK_CUR) < 0) - break; - } - } - else - id3->frequency = wavpack_sample_rates[srindx]; - - /* if the total number of samples is still unknown, make a guess on the high side (for now) */ - - if (totalsamples == (uint32_t) -1) { - totalsamples = id3->filesize * 3; - - if (!(flags & HYBRID_FLAG)) - totalsamples /= 2; - - if (!(flags & MONO_FLAG)) - totalsamples /= 2; - } - - id3->length = ((int64_t) totalsamples * 1000) / id3->frequency; - id3->bitrate = id3->filesize / (id3->length / 8); - - read_ape_tags(fd, id3); - return true; - } - else { /* block did not contain audio, so seek to the end and see if there's another */ - if ((meta_bytes > 0 && lseek(fd, meta_bytes, SEEK_CUR) < 0) || - read(fd, buf, 32) < 32 || memcmp (buf, "wvpk", 4) != 0) - break; - } - } - - return false; -} |