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Add DSP hist utils

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This commit is contained in:
bnnm 2017-08-12 18:39:56 +02:00
parent d219804b99
commit 272b55cb3e
2 changed files with 24 additions and 3 deletions
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3
src/coding/coding.h
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@ -42,6 +42,9 @@ int32_t dsp_nibbles_to_samples(int32_t nibbles);
void dsp_read_coefs_be(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing);
void dsp_read_coefs_le(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing);
void dsp_read_coefs(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing, int be);
void dsp_read_hist_be(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing);
void dsp_read_hist_le(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing);
void dsp_read_hist(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing, int be);
/* ngc_dtk_decoder */
void decode_ngc_dtk(VGMSTREAMCHANNEL * stream, sample * outbuf, int channelspacing, int32_t first_sample, int32_t samples_to_do, int channel);

24
src/coding/ngc_dsp_decoder.c
View File

@ -100,9 +100,7 @@ size_t dsp_bytes_to_samples(size_t bytes, int channels) {
}
/**
* reads DSP coefs built in the streamfile
*/
/* reads DSP coefs built in the streamfile */
void dsp_read_coefs_be(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing) {
dsp_read_coefs(vgmstream, streamFile, offset, spacing, 1);
}
@ -121,3 +119,23 @@ void dsp_read_coefs(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset,
}
}
/* reads DSP initial hist built in the streamfile */
void dsp_read_hist_be(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing) {
dsp_read_hist(vgmstream, streamFile, offset, spacing, 1);
}
void dsp_read_hist_le(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing) {
dsp_read_hist(vgmstream, streamFile, offset, spacing, 0);
}
void dsp_read_hist(VGMSTREAM * vgmstream, STREAMFILE *streamFile, off_t offset, off_t spacing, int be) {
int ch;
/* get ADPCM hist */
for (ch=0; ch < vgmstream->channels; ch++) {
vgmstream->ch[ch].adpcm_history1_16 = be ?
read_16bitBE(offset + ch*spacing + 0*2, streamFile) :
read_16bitLE(offset + ch*spacing + 0*2, streamFile);;
vgmstream->ch[ch].adpcm_history2_16 = be ?
read_16bitBE(offset + ch*spacing + 1*2, streamFile) :
read_16bitLE(offset + ch*spacing + 1*2, streamFile);;
}
}