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Start converting codecs to use internal sample format (28 bits + sign,

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or s3.28 fixed point).


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8680 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Thom Johansen 2006-02-13 19:24:36 +00:00
parent 65bfd83ce0
commit 153f906d74
2 changed files with 2 additions and 11 deletions
Download patch file Download diff file Expand all files Collapse all files

3
apps/codecs/libmusepack/synth_filter.c
View file

@ -367,7 +367,6 @@ static void Synthese_Filter_float_internal(MPC_SAMPLE_FORMAT * OutData,MPC_SAMPL
"mac.l %%d2, %%a5, (992*4, %[V]), %%a5, %%acc0\n\t" "mac.l %%d2, %%a5, (992*4, %[V]), %%a5, %%acc0\n\t"
"mac.l %%d3, %%a5, %%acc0\n\t" "mac.l %%d3, %%a5, %%acc0\n\t"
"movclr.l %%acc0, %%d0\n\t" "movclr.l %%acc0, %%d0\n\t"
"asl.l #1, %%d0\n\t"
"move.l %%d0, (%[Data])+\n" "move.l %%d0, (%[Data])+\n"
: [Data] "+a" (Data) : [Data] "+a" (Data)
: [V] "a" (V), [D] "a" (D) : [V] "a" (V), [D] "a" (D)
@ -378,7 +377,7 @@ static void Synthese_Filter_float_internal(MPC_SAMPLE_FORMAT * OutData,MPC_SAMPL
+ MPC_MULTIPLY_FRACT(V[256],D[ 4]) + MPC_MULTIPLY_FRACT(V[352],D[ 5]) + MPC_MULTIPLY_FRACT(V[384],D[ 6]) + MPC_MULTIPLY_FRACT(V[480],D[ 7]) + MPC_MULTIPLY_FRACT(V[256],D[ 4]) + MPC_MULTIPLY_FRACT(V[352],D[ 5]) + MPC_MULTIPLY_FRACT(V[384],D[ 6]) + MPC_MULTIPLY_FRACT(V[480],D[ 7])
+ MPC_MULTIPLY_FRACT(V[512],D[ 8]) + MPC_MULTIPLY_FRACT(V[608],D[ 9]) + MPC_MULTIPLY_FRACT(V[640],D[10]) + MPC_MULTIPLY_FRACT(V[736],D[11]) + MPC_MULTIPLY_FRACT(V[512],D[ 8]) + MPC_MULTIPLY_FRACT(V[608],D[ 9]) + MPC_MULTIPLY_FRACT(V[640],D[10]) + MPC_MULTIPLY_FRACT(V[736],D[11])
+ MPC_MULTIPLY_FRACT(V[768],D[12]) + MPC_MULTIPLY_FRACT(V[864],D[13]) + MPC_MULTIPLY_FRACT(V[896],D[14]) + MPC_MULTIPLY_FRACT(V[992],D[15]) + MPC_MULTIPLY_FRACT(V[768],D[12]) + MPC_MULTIPLY_FRACT(V[864],D[13]) + MPC_MULTIPLY_FRACT(V[896],D[14]) + MPC_MULTIPLY_FRACT(V[992],D[15])
, 2); , 1);
Data += 1; Data += 1;
#endif #endif

10
apps/codecs/mpc.c
View file

@ -92,15 +92,7 @@ enum codec_status codec_start(struct codec_api *api)
ci->configure(CODEC_DSP_ENABLE, (bool *)true); ci->configure(CODEC_DSP_ENABLE, (bool *)true);
ci->configure(DSP_DITHER, (bool *)false); ci->configure(DSP_DITHER, (bool *)false);
ci->configure(DSP_SET_SAMPLE_DEPTH, (long *)(28));
/* NOTE: this _should_ be set to MPC_FIXED_POINT_SCALE_SHIFT, not with
a 1 subtracted. However, doing so yields an output with only half the
amplitude it should have, so currently we use what's here, as it gives
correct level output. */
ci->configure(DSP_SET_SAMPLE_DEPTH, (long *)(MPC_FIXED_POINT_SCALE_SHIFT - 1));
/* disable these until we can figure out what's going on.
ci->configure(DSP_SET_CLIP_MAX, (long *)MPC_FIXED_POINT_SCALE);
ci->configure(DSP_SET_CLIP_MIN, (long *)-MPC_FIXED_POINT_SCALE);*/
ci->configure(CODEC_SET_FILEBUF_CHUNKSIZE, (long *)(1024*16)); ci->configure(CODEC_SET_FILEBUF_CHUNKSIZE, (long *)(1024*16));
/* Create a decoder instance */ /* Create a decoder instance */