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Diffstat (limited to 'src/libmad/frame.h')
| -rw-r--r-- | src/libmad/frame.h | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/src/libmad/frame.h b/src/libmad/frame.h index 3f5bf37ef..e69de29bb 100644 --- a/src/libmad/frame.h +++ b/src/libmad/frame.h @@ -1,118 +0,0 @@ -/* - * libmad - MPEG audio decoder library - * Copyright (C) 2000-2004 Underbit Technologies, Inc. - * - * 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 - * - * $Id: frame.h,v 1.20 2004/01/23 09:41:32 rob Exp $ - */ - -# ifndef LIBMAD_FRAME_H -# define LIBMAD_FRAME_H - -# include "fixed.h" -# include "timer.h" -# include "stream.h" - -enum mad_layer { - MAD_LAYER_I = 1, /* Layer I */ - MAD_LAYER_II = 2, /* Layer II */ - MAD_LAYER_III = 3 /* Layer III */ -}; - -enum mad_mode { - MAD_MODE_SINGLE_CHANNEL = 0, /* single channel */ - MAD_MODE_DUAL_CHANNEL = 1, /* dual channel */ - MAD_MODE_JOINT_STEREO = 2, /* joint (MS/intensity) stereo */ - MAD_MODE_STEREO = 3 /* normal LR stereo */ -}; - -enum mad_emphasis { - MAD_EMPHASIS_NONE = 0, /* no emphasis */ - MAD_EMPHASIS_50_15_US = 1, /* 50/15 microseconds emphasis */ - MAD_EMPHASIS_CCITT_J_17 = 3, /* CCITT J.17 emphasis */ - MAD_EMPHASIS_RESERVED = 2 /* unknown emphasis */ -}; - -struct mad_header { - enum mad_layer layer; /* audio layer (1, 2, or 3) */ - enum mad_mode mode; /* channel mode (see above) */ - int mode_extension; /* additional mode info */ - enum mad_emphasis emphasis; /* de-emphasis to use (see above) */ - - unsigned long bitrate; /* stream bitrate (bps) */ - unsigned int samplerate; /* sampling frequency (Hz) */ - - unsigned short crc_check; /* frame CRC accumulator */ - unsigned short crc_target; /* final target CRC checksum */ - - int flags; /* flags (see below) */ - int private_bits; /* private bits (see below) */ - - mad_timer_t duration; /* audio playing time of frame */ -}; - -struct mad_frame { - struct mad_header header; /* MPEG audio header */ - - int options; /* decoding options (from stream) */ - - mad_fixed_t sbsample[2][36][32]; /* synthesis subband filter samples */ - mad_fixed_t (*overlap)[2][32][18]; /* Layer III block overlap data */ -}; - -# define MAD_NCHANNELS(header) ((header)->mode ? 2 : 1) -# define MAD_NSBSAMPLES(header) \ - ((header)->layer == MAD_LAYER_I ? 12 : \ - (((header)->layer == MAD_LAYER_III && \ - ((header)->flags & MAD_FLAG_LSF_EXT)) ? 18 : 36)) - -enum { - MAD_FLAG_NPRIVATE_III = 0x0007, /* number of Layer III private bits */ - MAD_FLAG_INCOMPLETE = 0x0008, /* header but not data is decoded */ - - MAD_FLAG_PROTECTION = 0x0010, /* frame has CRC protection */ - MAD_FLAG_COPYRIGHT = 0x0020, /* frame is copyright */ - MAD_FLAG_ORIGINAL = 0x0040, /* frame is original (else copy) */ - MAD_FLAG_PADDING = 0x0080, /* frame has additional slot */ - - MAD_FLAG_I_STEREO = 0x0100, /* uses intensity joint stereo */ - MAD_FLAG_MS_STEREO = 0x0200, /* uses middle/side joint stereo */ - MAD_FLAG_FREEFORMAT = 0x0400, /* uses free format bitrate */ - - MAD_FLAG_LSF_EXT = 0x1000, /* lower sampling freq. extension */ - MAD_FLAG_MC_EXT = 0x2000, /* multichannel audio extension */ - MAD_FLAG_MPEG_2_5_EXT = 0x4000 /* MPEG 2.5 (unofficial) extension */ -}; - -enum { - MAD_PRIVATE_HEADER = 0x0100, /* header private bit */ - MAD_PRIVATE_III = 0x001f /* Layer III private bits (up to 5) */ -}; - -void mad_header_init(struct mad_header *); - -# define mad_header_finish(header) /* nothing */ - -int mad_header_decode(struct mad_header *, struct mad_stream *); - -void mad_frame_init(struct mad_frame *); -void mad_frame_finish(struct mad_frame *); - -int mad_frame_decode(struct mad_frame *, struct mad_stream *); - -void mad_frame_mute(struct mad_frame *); - -# endif |