From 96c45759a327b0176894fd3ab5aa04ad8b3202fc Mon Sep 17 00:00:00 2001 From: waker Date: Tue, 1 Sep 2009 19:59:19 +0200 Subject: fixed apedec (mac plugin) license; moved libdemac; started work on demac plugin --- plugins/demac/libdemac/parser.h | 137 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 137 insertions(+) create mode 100644 plugins/demac/libdemac/parser.h (limited to 'plugins/demac/libdemac/parser.h') diff --git a/plugins/demac/libdemac/parser.h b/plugins/demac/libdemac/parser.h new file mode 100644 index 00000000..0cfa665d --- /dev/null +++ b/plugins/demac/libdemac/parser.h @@ -0,0 +1,137 @@ +/* + +libdemac - A Monkey's Audio decoder + +$Id: parser.h 19552 2008-12-21 23:49:02Z amiconn $ + +Copyright (C) Dave Chapman 2007 + +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., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA + +*/ + +#ifndef _APE_PARSER_H +#define _APE_PARSER_H + +#include +#include "demac_config.h" + +/* The earliest and latest file formats supported by this library */ +#define APE_MIN_VERSION 3970 +#define APE_MAX_VERSION 3990 + +#define MAC_FORMAT_FLAG_8_BIT 1 // is 8-bit [OBSOLETE] +#define MAC_FORMAT_FLAG_CRC 2 // uses the new CRC32 error detection [OBSOLETE] +#define MAC_FORMAT_FLAG_HAS_PEAK_LEVEL 4 // uint32 nPeakLevel after the header [OBSOLETE] +#define MAC_FORMAT_FLAG_24_BIT 8 // is 24-bit [OBSOLETE] +#define MAC_FORMAT_FLAG_HAS_SEEK_ELEMENTS 16 // has the number of seek elements after the peak level +#define MAC_FORMAT_FLAG_CREATE_WAV_HEADER 32 // create the wave header on decompression (not stored) + + +/* Special frame codes: + + MONO_SILENCE - All PCM samples in frame are zero (mono streams only) + LEFT_SILENCE - All PCM samples for left channel in frame are zero (stereo streams) + RIGHT_SILENCE - All PCM samples for left channel in frame are zero (stereo streams) + PSEUDO_STEREO - Left and Right channels are identical + +*/ + +#define APE_FRAMECODE_MONO_SILENCE 1 +#define APE_FRAMECODE_LEFT_SILENCE 1 /* same as mono */ +#define APE_FRAMECODE_RIGHT_SILENCE 2 +#define APE_FRAMECODE_STEREO_SILENCE 3 /* combined */ +#define APE_FRAMECODE_PSEUDO_STEREO 4 + +#define PREDICTOR_ORDER 8 +/* Total size of all predictor histories - 50 * sizeof(int32_t) */ +#define PREDICTOR_SIZE 50 + + +/* NOTE: This struct is used in predictor-arm.S - any updates need to + be reflected there. */ + +struct predictor_t +{ + /* Filter histories */ + int32_t* buf; + + int32_t YlastA; + int32_t XlastA; + + /* NOTE: The order of the next four fields is important for + predictor-arm.S */ + int32_t YfilterB; + int32_t XfilterA; + int32_t XfilterB; + int32_t YfilterA; + + /* Adaption co-efficients */ + int32_t YcoeffsA[4]; + int32_t XcoeffsA[4]; + int32_t YcoeffsB[5]; + int32_t XcoeffsB[5]; + int32_t historybuffer[PREDICTOR_HISTORY_SIZE + PREDICTOR_SIZE]; +}; + +struct ape_ctx_t +{ + /* Derived fields */ + uint32_t junklength; + uint32_t firstframe; + uint32_t totalsamples; + + /* Info from Descriptor Block */ + char magic[4]; + int16_t fileversion; + int16_t padding1; + uint32_t descriptorlength; + uint32_t headerlength; + uint32_t seektablelength; + uint32_t wavheaderlength; + uint32_t audiodatalength; + uint32_t audiodatalength_high; + uint32_t wavtaillength; + uint8_t md5[16]; + + /* Info from Header Block */ + uint16_t compressiontype; + uint16_t formatflags; + uint32_t blocksperframe; + uint32_t finalframeblocks; + uint32_t totalframes; + uint16_t bps; + uint16_t channels; + uint32_t samplerate; + + /* Seektable */ + uint32_t* seektable; /* Seektable buffer */ + uint32_t maxseekpoints; /* Max seekpoints we can store (size of seektable buffer) */ + uint32_t numseekpoints; /* Number of seekpoints */ + int seektablefilepos; /* Location in .ape file of seektable */ + + /* Decoder state */ + uint32_t CRC; + int frameflags; + int currentframeblocks; + int blocksdecoded; + struct predictor_t predictor; +}; + +int ape_parseheader(int fd, struct ape_ctx_t* ape_ctx); +int ape_parseheaderbuf(unsigned char* buf, struct ape_ctx_t* ape_ctx); +void ape_dumpinfo(struct ape_ctx_t* ape_ctx); + +#endif -- cgit v1.2.3