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Add bitpacker (untested)

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This commit is contained in:
Jean-Marc Valin 2019-03-14 18:26:56 -04:00
parent accd7a2bd1
commit 23859d74ff
1 changed files with 59 additions and 0 deletions
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59
dnn/dump_data.c
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@ -466,6 +466,64 @@ void perform_interp_relaxation(float features[4][NB_FEATURES], const float *mem)
for (i=0;i<NB_BANDS;i++) features[1][i] *= count_1;
}
#define BITS_PER_CHAR 8
typedef struct {
int byte_pos;
int bit_pos;
int max_bytes;
unsigned char *chars;
} packer;
void bits_init(packer *bits, unsigned char *buf, int size) {
bits->byte_pos = 0;
bits->bit_pos = 0;
bits->max_bytes = size;
bits->chars = buf;
}
void bits_pack(packer *bits, unsigned int data, int nb_bits) {
while(nb_bits)
{
int bit;
if (bits->byte_pos == bits->max_bytes) {
fprintf(stderr, "something went horribly wrong\n");
return;
}
bit = (data>>(nb_bits-1))&1;
bits->chars[bits->byte_pos] |= bit<<(BITS_PER_CHAR-1-bits->bit_pos);
bits->bit_pos++;
if (bits->bit_pos==BITS_PER_CHAR)
{
bits->bit_pos=0;
bits->byte_pos++;
if (bits->byte_pos < bits->max_bytes) bits->chars[bits->byte_pos] = 0;
}
nb_bits--;
}
}
unsigned int bits_unpack(packer *bits, int nb_bits) {
unsigned int d=0;
while(nb_bits)
{
if (bits->byte_pos == bits->max_bytes) {
fprintf(stderr, "something went horribly wrong\n");
return 0;
}
d<<=1;
d |= (bits->chars[bits->byte_pos]>>(BITS_PER_CHAR-1 - bits->bit_pos))&1;
bits->bit_pos++;
if (bits->bit_pos==BITS_PER_CHAR)
{
bits->bit_pos=0;
bits->byte_pos++;
}
nb_bits--;
}
return d;
}
typedef struct {
float analysis_mem[OVERLAP_SIZE];
float cepstral_mem[CEPS_MEM][NB_BANDS];
@ -832,6 +890,7 @@ void compute_noise(int *noise, float noise_std) {
}
}
void write_audio(DenoiseState *st, const short *pcm, const int *noise, FILE *file) {
int i, k;
for (k=0;k<4;k++) {