Displaying 5 results from an estimated 5 matches for "samp_frac_num".
2008 May 03
2
Resampler (no api)
...uint32_t channel_index, const spx_word16_t *in, spx_uint32_t *in_len, spx_word16_t *out, spx_uint32_t *out_len)
{
- int N = st->filt_len;
+ const int N = st->filt_len;
int out_sample = 0;
- spx_word16_t *mem;
int last_sample = st->last_sample[channel_index];
spx_uint32_t samp_frac_num = st->samp_frac_num[channel_index];
- mem = st->mem + channel_index * st->mem_alloc_size;
+ const spx_word16_t *sinc_table = st->sinc_table;
+ const int out_stride = st->out_stride;
+ const int int_advance = st->int_advance;
+ const int frac_advance = st->frac_advance...
2008 May 03
0
Resampler, memory only variant
...uint32_t channel_index, const spx_word16_t *in, spx_uint32_t *in_len, spx_word16_t *out, spx_uint32_t *out_len)
{
- int N = st->filt_len;
+ const int N = st->filt_len;
int out_sample = 0;
- spx_word16_t *mem;
int last_sample = st->last_sample[channel_index];
spx_uint32_t samp_frac_num = st->samp_frac_num[channel_index];
- mem = st->mem + channel_index * st->mem_alloc_size;
+ const spx_word16_t *sinc_table = st->sinc_table;
+ const int out_stride = st->out_stride;
+ const int int_advance = st->int_advance;
+ const int frac_advance = st->frac_advance...
2011 Sep 01
0
[PATCH 3/5] resample: Add NEON optimized inner_product_single for fixed point
...accum[2] + accum[3];
*/
+ sum = SATURATE32PSHR(sum, 15, 32767);
#else
sum = inner_product_single(sinc, iptr, N);
#endif
- out[out_stride * out_sample++] = SATURATE32(PSHR32(sum, 15), 32767);
+ out[out_stride * out_sample++] = sum;
last_sample += int_advance;
samp_frac_num += frac_advance;
if (samp_frac_num >= den_rate)
@@ -470,12 +475,13 @@ static int resampler_basic_interpolate_single(SpeexResamplerState *st, spx_uint3
cubic_coef(frac, interp);
sum = MULT16_32_Q15(interp[0],SHR32(accum[0], 1)) + MULT16_32_Q15(interp[1],SHR32(accum[1], 1))...
2011 Sep 01
6
[PATCH 0/5] ARM NEON optimization for samplerate converter
From: Jyri Sarha <jsarha at ti.com>
I optimized Speex resampler for NEON capable ARM CPUs. The first patch
should speed up resampling on any platform that can spare the
increased memory usage. It would be nice to have these merged to the
master branch. Please let me know if there is anything I can do to
help the the merge. The patches have been rebased on top of master
branch in
2010 Nov 10
0
bug fix for speex_resampler_reset_mem?
...lerState *st)
{
spx_uint32_t i;
for (i=0;i<st->nb_channels*(st->filt_len-1);i++)
st->mem[i] = 0;
// added bugfix below:
st->started = 0;
for (i=0;i<st->nb_channels;i++)
{
st->last_sample[i] = 0;
st->magic_samples[i] = 0;
st->samp_frac_num[i] = 0;
}
return RESAMPLER_ERR_SUCCESS;
}
Note that I have to call speex_resampler_skip_zeros() again after each
reset call, whether or not I zero st->last_sample[i] or not.
Also, I'm not 100% sure whether resetting st->started = 0 is strictly
necessary or not.
Thanks for a grea...