/* * mad - MPEG audio decoder * Copyright (C) 2000-2001 Robert Leslie * * 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 * * If you would like to negotiate alternate licensing terms, you may do * so by contacting the author: Robert Leslie */ # define FPM_ARM # define SIZEOF_INT 4 # define SIZEOF_LONG 4 # define SIZEOF_LONG_LONG 8 /* Id: version.h,v 1.12 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_VERSION_H # define MAD_VERSION_H # define MAD_VERSION_MAJOR 0 # define MAD_VERSION_MINOR 12 # define MAD_VERSION_PATCH 3 # define MAD_VERSION_EXTRA " (beta)" # define MAD_VERSION_STRINGIZE(str) #str # define MAD_VERSION_STRING(num) MAD_VERSION_STRINGIZE(num) # define MAD_VERSION MAD_VERSION_STRING(MAD_VERSION_MAJOR) "." \ MAD_VERSION_STRING(MAD_VERSION_MINOR) "." \ MAD_VERSION_STRING(MAD_VERSION_PATCH) \ MAD_VERSION_EXTRA # define MAD_PUBLISHYEAR "2000-2001" # define MAD_AUTHOR "Robert Leslie" # define MAD_EMAIL "rob@mars.org" extern char const mad_version[]; extern char const mad_copyright[]; extern char const mad_author[]; extern char const mad_build[]; # endif /* Id: fixed.h,v 1.13 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_FIXED_H # define MAD_FIXED_H # if SIZEOF_INT >= 4 typedef signed int mad_fixed_t; typedef signed int mad_fixed64hi_t; typedef unsigned int mad_fixed64lo_t; # else typedef signed long mad_fixed_t; typedef signed long mad_fixed64hi_t; typedef unsigned long mad_fixed64lo_t; # endif /* * Fixed-point format: 0xABBBBBBB * A == whole part (sign + 3 bits) * B == fractional part (28 bits) * * Values are signed two's complement, so the effective range is: * 0x80000000 to 0x7fffffff * -8.0 to +7.9999999962747097015380859375 * * The smallest representable value is: * 0x00000001 == 0.0000000037252902984619140625 (i.e. about 3.725e-9) * * 28 bits of fractional accuracy represent about * 8.6 digits of decimal accuracy. * * Fixed-point numbers can be added or subtracted as normal * integers, but multiplication requires shifting the 64-bit result * from 56 fractional bits back to 28 (and rounding.) * * Changing the definition of MAD_F_FRACBITS is only partially * supported, and must be done with care. */ # define MAD_F_FRACBITS 28 # if MAD_F_FRACBITS == 28 # define MAD_F(x) ((mad_fixed_t) (x##L)) # else # if MAD_F_FRACBITS < 28 # warning "MAD_F_FRACBITS < 28" # define MAD_F(x) ((mad_fixed_t) \ (((x##L) + \ (1L << (28 - MAD_F_FRACBITS - 1))) >> \ (28 - MAD_F_FRACBITS))) # elif MAD_F_FRACBITS > 28 # error "MAD_F_FRACBITS > 28 not currently supported" # define MAD_F(x) ((mad_fixed_t) \ ((x##L) << (MAD_F_FRACBITS - 28))) # endif # endif # define MAD_F_MIN ((mad_fixed_t) -0x80000000L) # define MAD_F_MAX ((mad_fixed_t) +0x7fffffffL) # define MAD_F_ONE MAD_F(0x10000000) # define mad_f_tofixed(x) ((mad_fixed_t) \ ((x) * (double) (1L << MAD_F_FRACBITS) + 0.5)) # define mad_f_todouble(x) ((double) \ ((x) / (double) (1L << MAD_F_FRACBITS))) # define mad_f_intpart(x) ((x) >> MAD_F_FRACBITS) # define mad_f_fracpart(x) ((x) & ((1L << MAD_F_FRACBITS) - 1)) /* (x should be positive) */ # define mad_f_fromint(x) ((x) << MAD_F_FRACBITS) # define mad_f_add(x, y) ((x) + (y)) # define mad_f_sub(x, y) ((x) - (y)) # if defined(OPT_ACCURACY) # define mad_f_scale64(hi, lo) \ ((((mad_fixed_t) \ (((mad_fixed64hi_t) (hi) << (32 - (MAD_F_SCALEBITS - 1))) | \ ((mad_fixed64lo_t) (lo) >> (MAD_F_SCALEBITS - 1)))) + 1) >> 1) # else # define mad_f_scale64(hi, lo) \ ((mad_fixed_t) \ (((mad_fixed64hi_t) (hi) << (32 - MAD_F_SCALEBITS)) | \ ((mad_fixed64lo_t) (lo) >> MAD_F_SCALEBITS))) # endif # if defined(FPM_APPROX) /* * This version is the most portable but it loses significant accuracy. * Furthermore, accuracy is biased against the second argument, so care * should be taken when ordering operands. * * The scale factors are constant as this is not used with SSO. * * Pre-rounding is required to stay within the limits of compliance. */ # define mad_f_mul(x, y) ((((x) + (1L << 11)) >> 12) * \ (((y) + (1L << 15)) >> 16)) # elif defined(FPM_64BIT) /* * This version should be the most accurate if 64-bit (long long) types are * supported by the compiler, although it may not be the most efficient. */ # if defined(OPT_ACCURACY) # define mad_f_mul(x, y) \ ((mad_fixed_t) \ ((((signed long long) (x) * (y)) + \ (1L << (MAD_F_SCALEBITS - 1))) >> MAD_F_SCALEBITS)) # else # define mad_f_mul(x, y) \ ((mad_fixed_t) (((signed long long) (x) * (y)) >> MAD_F_SCALEBITS)) # endif # define MAD_F_SCALEBITS MAD_F_FRACBITS # elif defined(FPM_INTEL) /* * This Intel version is fast and accurate; the disposition of the least * significant bit depends on OPT_ACCURACY via mad_f_scale64(). */ # define mad_f_mul(x, y) \ ({ mad_fixed64hi_t __hi; \ mad_fixed64lo_t __lo; \ asm ("imull %3" \ : "=a" (__lo), "=d" (__hi) \ : "%a" (x), "rm" (y) \ : "cc"); \ mad_f_scale64(__hi, __lo); \ }) # if defined(OPT_ACCURACY) /* * This gives best accuracy but is not very fast. */ # define MAD_F_HAVEMLA # define mad_f_mla(hi, lo, x, y) \ ({ mad_fixed64hi_t __hi; \ mad_fixed64lo_t __lo; \ asm ("imull %3" \ : "=a" (__lo), "=d" (__hi) \ : "%a" (x), "rm" (y) \ : "cc"); \ asm ("addl %3, %0\n\t" \ "adcl %5, %1\n\t" \ : "=r,rm" (*(lo)), "=r,rm" (*(hi)) \ : "%0,0" (*(lo)), "rm,r" (__lo), "%1,1" (*(hi)), "rm,r" (__hi) \ : "cc"); \ }) # endif /* OPT_ACCURACY */ # if defined(OPT_ACCURACY) /* * Surprisingly, this is faster than SHRD followed by ADC. */ # undef mad_f_scale64 # define mad_f_scale64(hi, lo) \ ({ mad_fixed64hi_t __hi_; \ mad_fixed64lo_t __lo_; \ mad_fixed_t __result; \ asm ("addl %4, %2\n\t" \ "adcl %5, %3" \ : "=rm" (__lo_), "=rm" (__hi_) \ : "0" (lo), "1" (hi), \ "ir" (1L << (MAD_F_SCALEBITS - 1)), "ir" (0) \ : "cc"); \ asm ("shrdl %3, %2, %1" \ : "=rm" (__result) \ : "0" (__lo_), "r" (__hi_), "I" (MAD_F_SCALEBITS) \ : "cc"); \ __result; \ }) # else # undef mad_f_scale64 # define mad_f_scale64(hi, lo) \ ({ mad_fixed_t __result; \ asm ("shrdl %3, %2, %1" \ : "=rm" (__result) \ : "0" (lo), "r" (hi), "I" (MAD_F_SCALEBITS) \ : "cc"); \ __result; \ }) # endif /* OPT_ACCURACY */ # define MAD_F_SCALEBITS MAD_F_FRACBITS # elif defined(FPM_ARM) /* * This ARM V4 version is as accurate as FPM_64BIT but much faster. The * least significant bit is properly rounded at no CPU cycle cost! */ # define mad_f_mul(x, y) \ ({ mad_fixed64hi_t __hi; \ mad_fixed64lo_t __lo; \ mad_fixed_t __result; \ asm ("smull %0, %1, %3, %4\n\t" \ "movs %0, %0, lsr %5\n\t" \ "adc %2, %0, %1, lsl %6" \ : "=&r" (__lo), "=&r" (__hi), "=r" (__result) \ : "%r" (x), "r" (y), \ "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ : "cc"); \ __result; \ }) # define MAD_F_HAVEMLA # define mad_f_mla(hi, lo, x, y) \ asm ("smlal %0, %1, %2, %3" \ : "+r" (*(lo)), "+r" (*(hi)) \ : "%r" (x), "r" (y)) # undef mad_f_scale64 # define mad_f_scale64(hi, lo) \ ({ mad_fixed_t __result; \ asm ("movs %0, %1, lsr %3\n\t" \ "adc %0, %0, %2, lsl %4" \ : "=r" (__result) \ : "r" (lo), "r" (hi), \ "M" (MAD_F_SCALEBITS), "M" (32 - MAD_F_SCALEBITS) \ : "cc"); \ __result; \ }) # define MAD_F_SCALEBITS MAD_F_FRACBITS # elif defined(FPM_MIPS) /* * This MIPS version is fast and accurate; the disposition of the least * significant bit depends on OPT_ACCURACY via mad_f_scale64(). */ # define mad_f_mul(x, y) \ ({ mad_fixed64hi_t __hi; \ mad_fixed64lo_t __lo; \ asm ("mult %2, %3" \ : "=l" (__lo), "=h" (__hi) \ : "%r" (x), "r" (y)); \ mad_f_scale64(__hi, __lo); \ }) # if 0 /* assembler doesn't recognize this instruction? */ # define MAD_F_HAVEMLA # define mad_f_mla(hi, lo, x, y) \ asm ("macc r0, %2, %3" \ : "+l" (*(lo)), "+h" (*(hi)) \ : "%r" (x), "r" (y)); # endif # define MAD_F_SCALEBITS MAD_F_FRACBITS # elif defined(FPM_SPARC) /* * This SPARC V8 version is fast and accurate; the disposition of the least * significant bit depends on OPT_ACCURACY via mad_f_scale64(). */ # define mad_f_mul(x, y) \ ({ mad_fixed64hi_t __hi; \ mad_fixed64lo_t __lo; \ asm ("smul %2, %3, %0\n\t" \ "rd %%y, %1" \ : "=r" (__lo), "=r" (__hi) \ : "%r" (x), "rI" (y)); \ mad_f_scale64(__hi, __lo); \ }) # define MAD_F_SCALEBITS MAD_F_FRACBITS # else mad_fixed_t mad_f_mul(mad_fixed_t, mad_fixed_t); # endif mad_fixed_t mad_f_abs(mad_fixed_t); # endif /* Id: bit.h,v 1.5 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_BIT_H # define MAD_BIT_H struct mad_bitptr { unsigned char const *byte; unsigned short cache; unsigned short left; }; void mad_bit_init(struct mad_bitptr *, unsigned char const *); # define mad_bit_finish(bitptr) /* nothing */ # define mad_bit_set(bitptr1, bitptr2) (*(bitptr1) = *(bitptr2)) unsigned int mad_bit_length(struct mad_bitptr const *, struct mad_bitptr const *); # define mad_bit_bitsleft(bitptr) ((bitptr)->left) unsigned char const *mad_bit_nextbyte(struct mad_bitptr const *); void mad_bit_skip(struct mad_bitptr *, unsigned int); unsigned long mad_bit_read(struct mad_bitptr *, unsigned int); void mad_bit_write(struct mad_bitptr *, unsigned int, unsigned long); unsigned short mad_bit_crc(struct mad_bitptr, unsigned int, unsigned short); # endif /* Id: timer.h,v 1.8 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_TIMER_H # define MAD_TIMER_H typedef struct { signed long seconds; /* whole seconds */ unsigned long fraction; /* 1/MAD_TIMER_RESOLUTION seconds */ } mad_timer_t; extern mad_timer_t const mad_timer_zero; # define MAD_TIMER_RESOLUTION 352800000UL enum mad_units { MAD_UNITS_HOURS = -2, MAD_UNITS_MINUTES = -1, MAD_UNITS_SECONDS = 0, /* metric units */ MAD_UNITS_DECISECONDS = 10, MAD_UNITS_CENTISECONDS = 100, MAD_UNITS_MILLISECONDS = 1000, /* audio sample units */ MAD_UNITS_8000_HZ = 8000, MAD_UNITS_11025_HZ = 11025, MAD_UNITS_12000_HZ = 12000, MAD_UNITS_16000_HZ = 16000, MAD_UNITS_22050_HZ = 22050, MAD_UNITS_24000_HZ = 24000, MAD_UNITS_32000_HZ = 32000, MAD_UNITS_44100_HZ = 44100, MAD_UNITS_48000_HZ = 48000, /* video frame/field units */ MAD_UNITS_24_FPS = 24, MAD_UNITS_25_FPS = 25, MAD_UNITS_30_FPS = 30, MAD_UNITS_48_FPS = 48, MAD_UNITS_50_FPS = 50, MAD_UNITS_60_FPS = 60, /* CD audio frames */ MAD_UNITS_75_FPS = 75, /* video drop-frame units */ MAD_UNITS_23_976_FPS = -24, MAD_UNITS_24_975_FPS = -25, MAD_UNITS_29_97_FPS = -30, MAD_UNITS_47_952_FPS = -48, MAD_UNITS_49_95_FPS = -50, MAD_UNITS_59_94_FPS = -60 }; # define mad_timer_reset(timer) (*(timer) = mad_timer_zero) int mad_timer_compare(mad_timer_t, mad_timer_t); # define mad_timer_sign(timer) mad_timer_compare((timer), mad_timer_zero) void mad_timer_negate(mad_timer_t *); mad_timer_t mad_timer_abs(mad_timer_t); void mad_timer_set(mad_timer_t *, unsigned long, unsigned long, unsigned long); void mad_timer_add(mad_timer_t *, mad_timer_t); signed long mad_timer_count(mad_timer_t, enum mad_units); unsigned long mad_timer_fraction(mad_timer_t, unsigned long); void mad_timer_string(mad_timer_t, char *, char const *, enum mad_units, enum mad_units, unsigned long); # endif /* Id: stream.h,v 1.7 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_STREAM_H # define MAD_STREAM_H # define MAD_BUFFER_GUARD 4 # define MAD_BUFFER_MDLEN (511 + 2048 + MAD_BUFFER_GUARD) enum mad_error { MAD_ERROR_BUFLEN = 0x0001, /* input buffer too small (or EOF) */ MAD_ERROR_BUFPTR = 0x0002, /* invalid (null) buffer pointer */ MAD_ERROR_NOMEM = 0x0031, /* not enough memory */ MAD_ERROR_LOSTSYNC = 0x0101, /* lost synchronization */ MAD_ERROR_BADLAYER = 0x0102, /* reserved header layer value */ MAD_ERROR_BADBITRATE = 0x0103, /* forbidden bitrate value */ MAD_ERROR_BADSAMPLEFREQ = 0x0104, /* reserved sample frequency value */ MAD_ERROR_BADEMPHASIS = 0x0105, /* reserved emphasis value */ MAD_ERROR_BADCRC = 0x0201, /* CRC check failed */ MAD_ERROR_BADBITALLOC = 0x0211, /* forbidden bit allocation value */ MAD_ERROR_BADSCALEFACTOR = 0x0221, /* bad scalefactor index */ MAD_ERROR_BADFRAMELEN = 0x0231, /* bad frame length */ MAD_ERROR_BADBIGVALUES = 0x0232, /* bad big_values count */ MAD_ERROR_BADBLOCKTYPE = 0x0233, /* reserved block_type */ MAD_ERROR_BADDATAPTR = 0x0234, /* bad main_data_begin pointer */ MAD_ERROR_BADDATALEN = 0x0235, /* bad main data length */ MAD_ERROR_BADPART3LEN = 0x0236, /* bad audio data length */ MAD_ERROR_BADHUFFTABLE = 0x0237, /* bad Huffman table select */ MAD_ERROR_BADHUFFDATA = 0x0238, /* Huffman data overrun */ MAD_ERROR_BADSTEREO = 0x0239 /* incompatible block_type for MS */ }; struct mad_stream { unsigned char const *buffer; /* input bitstream buffer */ unsigned char const *bufend; /* end of buffer */ unsigned long skiplen; /* bytes to skip before next frame */ int sync; /* stream sync found */ unsigned long freerate; /* free bitrate (fixed) */ unsigned char const *this_frame; /* start of current frame */ unsigned char const *next_frame; /* start of next frame */ struct mad_bitptr ptr; /* current processing bit pointer */ struct mad_bitptr anc_ptr; /* ancillary bits pointer */ unsigned int anc_bitlen; /* number of ancillary bits */ unsigned char (*main_data)[MAD_BUFFER_MDLEN]; /* Layer III main_data() */ unsigned int md_len; /* bytes in main_data */ enum mad_error error; /* error code (see above) */ }; # define MAD_RECOVERABLE(error) ((error) & 0xff00) void mad_stream_init(struct mad_stream *); void mad_stream_finish(struct mad_stream *); void mad_stream_buffer(struct mad_stream *, unsigned char const *, unsigned long); void mad_stream_skip(struct mad_stream *, unsigned long); int mad_stream_sync(struct mad_stream *); # endif /* Id: frame.h,v 1.7 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_FRAME_H # define MAD_FRAME_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_MS = 1, /* 50/15 microseconds */ MAD_EMPHASIS_CCITT_J_17 = 3 /* CCITT J.17 */ }; struct mad_frame { struct mad_header { enum mad_layer layer; /* audio layer (1, 2, or 3) */ enum mad_mode mode; /* channel mode (see above) */ int mode_ext; /* additional mode info */ enum mad_emphasis emphasis; /* de-emphasis to use (see above) */ unsigned long bitrate; /* stream bitrate (bps) */ unsigned int sfreq; /* sampling frequency (Hz) */ unsigned int crc_header; /* header CRC partial checksum */ unsigned int crc_check; /* target CRC final checksum */ int flags; /* flags (below) */ int private; /* private bits (below) */ mad_timer_t duration; /* audio playing time of frame */ } header; 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_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 /* Id: synth.h,v 1.6 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_SYNTH_H # define MAD_SYNTH_H struct mad_synth { mad_fixed_t filter[2][2][2][16][8]; /* polyphase filterbank outputs */ /* [ch][eo][peo][s][v] */ unsigned short phase; /* current processing phase */ struct mad_pcm { unsigned short length; /* number of PCM samples */ mad_fixed_t samples[2][1152]; /* PCM sample outputs */ } pcm; }; void mad_synth_init(struct mad_synth *); # define mad_synth_finish(synth) /* nothing */ void mad_synth_frame(struct mad_synth *, struct mad_frame const *); void mad_synth_mute(struct mad_synth *); # endif /* Id: decoder.h,v 1.7 2001/01/21 00:18:15 rob Exp */ # ifndef MAD_DECODER_H # define MAD_DECODER_H enum mad_decoder_mode { MAD_DECODER_MODE_SYNC = 0, MAD_DECODER_MODE_ASYNC }; enum mad_flow { MAD_FLOW_CONTINUE = 0x0000, MAD_FLOW_STOP = 0x0010, MAD_FLOW_BREAK = 0x0011, MAD_FLOW_IGNORE = 0x0020 }; struct mad_decoder { enum mad_decoder_mode mode; struct { long pid; int in; int out; } async; struct { struct mad_stream stream; struct mad_frame frame; struct mad_synth synth; } *sync; void *cb_data; enum mad_flow (*input_func)(void *, struct mad_stream *); enum mad_flow (*header_func)(void *, struct mad_header const *); enum mad_flow (*filter_func)(void *, struct mad_frame *); enum mad_flow (*output_func)(void *, struct mad_header const *, struct mad_pcm *); enum mad_flow (*error_func)(void *, struct mad_stream *, struct mad_frame *); enum mad_flow (*message_func)(void *, void *, unsigned int *); }; void mad_decoder_init(struct mad_decoder *, void *, enum mad_flow (*)(void *, struct mad_stream *), enum mad_flow (*)(void *, struct mad_header const *), enum mad_flow (*)(void *, struct mad_frame *), enum mad_flow (*)(void *, struct mad_header const *, struct mad_pcm *), enum mad_flow (*)(void *, struct mad_stream *, struct mad_frame *), enum mad_flow (*)(void *, void *, unsigned int *)); int mad_decoder_finish(struct mad_decoder *); int mad_decoder_run(struct mad_decoder *, enum mad_decoder_mode); int mad_decoder_message(struct mad_decoder *, void *, unsigned int *); # endif