author | llornkcor <llornkcor> | 2005-11-08 23:16:03 (UTC) |
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committer | llornkcor <llornkcor> | 2005-11-08 23:16:03 (UTC) |
commit | 6bd52d3658f01c966d690b12235592a5473a4d57 (patch) (side-by-side diff) | |
tree | 76e25003b738fde6ebbea5d338b7cf76b82f47fa /core/multimedia/opieplayer/libmad/layer12.c | |
parent | a8063e0797d6edf2ead22fc8c5346ddf187f0b5d (diff) | |
download | opie-6bd52d3658f01c966d690b12235592a5473a4d57.zip opie-6bd52d3658f01c966d690b12235592a5473a4d57.tar.gz opie-6bd52d3658f01c966d690b12235592a5473a4d57.tar.bz2 |
update libmad and add 64bit define
Diffstat (limited to 'core/multimedia/opieplayer/libmad/layer12.c') (more/less context) (ignore whitespace changes)
-rw-r--r-- | core/multimedia/opieplayer/libmad/layer12.c | 64 |
1 files changed, 51 insertions, 13 deletions
diff --git a/core/multimedia/opieplayer/libmad/layer12.c b/core/multimedia/opieplayer/libmad/layer12.c index d291174..512b6a5 100644 --- a/core/multimedia/opieplayer/libmad/layer12.c +++ b/core/multimedia/opieplayer/libmad/layer12.c @@ -1,9 +1,9 @@ /* * libmad - MPEG audio decoder library - * Copyright (C) 2000-2001 Robert Leslie + * 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. * @@ -39,13 +39,13 @@ /* * scalefactor table * used in both Layer I and Layer II decoding */ static -mad_fixed_t const sf_table[63] = { +mad_fixed_t const sf_table[64] = { # include "sf_table.dat" }; /* --- Layer I ------------------------------------------------------------- */ /* linear scaling table */ @@ -160,16 +160,23 @@ int mad_layer_I(struct mad_stream *stream, struct mad_frame *frame) for (sb = 0; sb < 32; ++sb) { for (ch = 0; ch < nch; ++ch) { if (allocation[ch][sb]) { scalefactor[ch][sb] = mad_bit_read(&stream->ptr, 6); +# if defined(OPT_STRICT) + /* + * Scalefactor index 63 does not appear in Table B.1 of + * ISO/IEC 11172-3. Nonetheless, other implementations accept it, + * so we only reject it if OPT_STRICT is defined. + */ if (scalefactor[ch][sb] == 63) { stream->error = MAD_ERROR_BADSCALEFACTOR; return -1; } +# endif } } } /* decode samples */ @@ -331,26 +338,50 @@ int mad_layer_II(struct mad_stream *stream, struct mad_frame *frame) mad_fixed_t samples[3]; nch = MAD_NCHANNELS(header); if (header->flags & MAD_FLAG_LSF_EXT) index = 4; + else if (header->flags & MAD_FLAG_FREEFORMAT) + goto freeformat; else { - switch (nch == 2 ? header->bitrate / 2 : header->bitrate) { - case 32000: - case 48000: - index = (header->samplerate == 32000) ? 3 : 2; - break; + unsigned long bitrate_per_channel; + + bitrate_per_channel = header->bitrate; + if (nch == 2) { + bitrate_per_channel /= 2; + +# if defined(OPT_STRICT) + /* + * ISO/IEC 11172-3 allows only single channel mode for 32, 48, 56, and + * 80 kbps bitrates in Layer II, but some encoders ignore this + * restriction. We enforce it if OPT_STRICT is defined. + */ + if (bitrate_per_channel <= 28000 || bitrate_per_channel == 40000) { + stream->error = MAD_ERROR_BADMODE; + return -1; + } +# endif + } + else { /* nch == 1 */ + if (bitrate_per_channel > 192000) { + /* + * ISO/IEC 11172-3 does not allow single channel mode for 224, 256, + * 320, or 384 kbps bitrates in Layer II. + */ + stream->error = MAD_ERROR_BADMODE; + return -1; + } + } - case 56000: - case 64000: - case 80000: + if (bitrate_per_channel <= 48000) + index = (header->samplerate == 32000) ? 3 : 2; + else if (bitrate_per_channel <= 80000) index = 0; - break; - - default: + else { + freeformat: index = (header->samplerate == 48000) ? 0 : 1; } } sblimit = sbquant_table[index].sblimit; offsets = sbquant_table[index].offsets; @@ -428,18 +459,25 @@ int mad_layer_II(struct mad_stream *stream, struct mad_frame *frame) scalefactor[ch][sb][2] = mad_bit_read(&stream->ptr, 6); } if (scfsi[ch][sb] & 1) scalefactor[ch][sb][1] = scalefactor[ch][sb][scfsi[ch][sb] - 1]; +# if defined(OPT_STRICT) + /* + * Scalefactor index 63 does not appear in Table B.1 of + * ISO/IEC 11172-3. Nonetheless, other implementations accept it, + * so we only reject it if OPT_STRICT is defined. + */ if (scalefactor[ch][sb][0] == 63 || scalefactor[ch][sb][1] == 63 || scalefactor[ch][sb][2] == 63) { stream->error = MAD_ERROR_BADSCALEFACTOR; return -1; } +# endif } } } /* decode samples */ |