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Commit FS#9318 - MP3 synthesis filter on COP. Loads the MP3 synth filer on to the CoProcessor on all PortalPlayer devices, resulting in an ~90% speedup according to test_codec on the Sansa. Real world improvement is somewhat less, but still considerable. Allows MP3 decoding at 30MHz without boosting, or use of more DSP/EQ with less boosting/skipping, thus improving battery life. Minor changes to mpegplayer to retain compatibility with libmad changes. Should be no significant changes for other targets or codecs.

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18557 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Michael Giacomelli 2008-09-20 22:06:12 +00:00
parent 3d0d6d6bb2
commit 4e36a2b991
9 changed files with 180 additions and 32 deletions
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2
apps/codecs/libmad/layer3.c
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@ -3112,7 +3112,7 @@ enum mad_error III_decode(struct mad_bitptr *ptr, struct mad_frame *frame,
for (ch = 0; ch < nch; ++ch) {
struct channel const *channel = &granule->ch[ch];
mad_fixed_t (*sample)[32] = &frame->sbsample[ch][18 * gr];
mad_fixed_t (*sample)[32] = &((*frame->sbsample)[ch][18 * gr]);
unsigned int sb, l, i, sblimit;
mad_fixed_t output[36];