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2 libmad - MPEG audio decoder library
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3 Copyright (C) 2000-2004 Underbit Technologies, Inc.
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4
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5 $Id: TODO,v 1.3 2004/02/05 09:02:39 rob Exp $
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6
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7 ===============================================================================
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8
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9 libmad:
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10 - more API layers (buffering, PCM samples, dithering, etc.)
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11 - x86 performance optimization compiler flags
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12 - function documentation, general docs
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13 - finish async API
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14 - parse system streams?
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15 - MPEG-2 MC, AAC?
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16 - logarithmic multiplication?
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17 - multiple frame decoding for better locality of reference?
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18 - frame serial numbers, Layer III frame continuity checks
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19
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20 fixed.h:
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21 - experiment with FPM_INTEL:
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22
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23 # if 1
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24 # define mad_f_scale64(hi, lo) \
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25 ({ mad_fixed_t __result; \
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26 asm ("shrl %3,%1\n\t" \
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27 "shll %4,%2\n\t" \
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28 "orl %2,%1" \
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29 : "=rm" (__result) \
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30 : "0" (lo), "r" (hi), \
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31 "I" (MAD_F_SCALEBITS), "I" (32 - MAD_F_SCALEBITS) \
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32 : "cc"); \
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33 __result; \
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34 })
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35 # else
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36 # define mad_f_scale64(hi, lo) \
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37 ({ mad_fixed64hi_t __hi_; \
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38 mad_fixed64lo_t __lo_; \
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39 mad_fixed_t __result; \
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40 asm ("sall %2,%1" \
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41 : "=r" (__hi_) \
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42 : "0" (hi), "I" (32 - MAD_F_SCALEBITS) \
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43 : "cc"); \
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44 asm ("shrl %2,%1" \
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45 : "=r" (__lo_) \
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46 : "0" (lo), "I" (MAD_F_SCALEBITS) \
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47 : "cc"); \
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48 asm ("orl %1,%2" \
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49 : "=rm" (__result) \
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50 : "r" (__hi_), "0" (__lo_) \
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51 : "cc"); \
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52 __result; \
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53 })
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54 # endif
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55
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56 libmad Layer I:
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57 - check frame length sanity
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58
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59 libmad Layer II:
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60 - check frame length sanity
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61
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62 libmad Layer III:
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63 - circular buffer
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64 - optimize zero_part from Huffman decoding throughout
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65 - MPEG 2.5 8000 Hz sf bands? mixed blocks?
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66 - stereo->mono conversion optimization?
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67 - enable frame-at-a-time decoding
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68 - improve portability of huffman.c
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69
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