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Audio Recording module

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Implements an Audio bus effect that outputs the audio from the bus into a wav file

Now channels audio recording into an AudioStreamSample instead of saving to wav
This commit is contained in:
Gustav Lund 2018-01-18 16:03:53 +01:00
parent 8c9e10553c
commit cd2070c684
9 changed files with 485 additions and 117 deletions
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114
editor/import/resource_importer_wav.cpp
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@ -526,119 +526,5 @@ Error ResourceImporterWAV::import(const String &p_source_file, const String &p_s
return OK;
}
void ResourceImporterWAV::_compress_ima_adpcm(const Vector<float> &p_data, PoolVector<uint8_t> &dst_data) {
/*p_sample_data->data = (void*)malloc(len);
xm_s8 *dataptr=(xm_s8*)p_sample_data->data;*/
static const int16_t _ima_adpcm_step_table[89] = {
7, 8, 9, 10, 11, 12, 13, 14, 16, 17,
19, 21, 23, 25, 28, 31, 34, 37, 41, 45,
50, 55, 60, 66, 73, 80, 88, 97, 107, 118,
130, 143, 157, 173, 190, 209, 230, 253, 279, 307,
337, 371, 408, 449, 494, 544, 598, 658, 724, 796,
876, 963, 1060, 1166, 1282, 1411, 1552, 1707, 1878, 2066,
2272, 2499, 2749, 3024, 3327, 3660, 4026, 4428, 4871, 5358,
5894, 6484, 7132, 7845, 8630, 9493, 10442, 11487, 12635, 13899,
15289, 16818, 18500, 20350, 22385, 24623, 27086, 29794, 32767
};
static const int8_t _ima_adpcm_index_table[16] = {
-1, -1, -1, -1, 2, 4, 6, 8,
-1, -1, -1, -1, 2, 4, 6, 8
};
int datalen = p_data.size();
int datamax = datalen;
if (datalen & 1)
datalen++;
dst_data.resize(datalen / 2 + 4);
PoolVector<uint8_t>::Write w = dst_data.write();
int i, step_idx = 0, prev = 0;
uint8_t *out = w.ptr();
//int16_t xm_prev=0;
const float *in = p_data.ptr();
/* initial value is zero */
*(out++) = 0;
*(out++) = 0;
/* Table index initial value */
*(out++) = 0;
/* unused */
*(out++) = 0;
for (i = 0; i < datalen; i++) {
int step, diff, vpdiff, mask;
uint8_t nibble;
int16_t xm_sample;
if (i >= datamax)
xm_sample = 0;
else {
xm_sample = CLAMP(in[i] * 32767.0, -32768, 32767);
/*
if (xm_sample==32767 || xm_sample==-32768)
printf("clippy!\n",xm_sample);
*/
}
//xm_sample=xm_sample+xm_prev;
//xm_prev=xm_sample;
diff = (int)xm_sample - prev;
nibble = 0;
step = _ima_adpcm_step_table[step_idx];
vpdiff = step >> 3;
if (diff < 0) {
nibble = 8;
diff = -diff;
}
mask = 4;
while (mask) {
if (diff >= step) {
nibble |= mask;
diff -= step;
vpdiff += step;
}
step >>= 1;
mask >>= 1;
};
if (nibble & 8)
prev -= vpdiff;
else
prev += vpdiff;
if (prev > 32767) {
//printf("%i,xms %i, prev %i,diff %i, vpdiff %i, clip up %i\n",i,xm_sample,prev,diff,vpdiff,prev);
prev = 32767;
} else if (prev < -32768) {
//printf("%i,xms %i, prev %i,diff %i, vpdiff %i, clip down %i\n",i,xm_sample,prev,diff,vpdiff,prev);
prev = -32768;
}
step_idx += _ima_adpcm_index_table[nibble];
if (step_idx < 0)
step_idx = 0;
else if (step_idx > 88)
step_idx = 88;
if (i & 1) {
*out |= nibble << 4;
out++;
} else {
*out = nibble;
}
/*dataptr[i]=prev>>8;*/
}
}
ResourceImporterWAV::ResourceImporterWAV() {
}