diff options
Diffstat (limited to 'speex/resample.c')
| -rw-r--r-- | speex/resample.c | 23 |
1 files changed, 19 insertions, 4 deletions
diff --git a/speex/resample.c b/speex/resample.c index cd01732..1cc4d49 100644 --- a/speex/resample.c +++ b/speex/resample.c @@ -84,6 +84,7 @@ static void speex_free (void *ptr) {free(ptr);} #define OVERSAMPLE 8 #define IMAX(a,b) ((a) > (b) ? (a) : (b)) +#define IMIN(a,b) ((a) < (b) ? (a) : (b)) #ifndef NULL #define NULL 0 @@ -576,10 +577,10 @@ static void update_filter(SpeexResamplerState *st) } for (i=0;i<st->den_rate;i++) { - spx_uint32_t j; + spx_int32_t j; for (j=0;j<st->filt_len;j++) { - st->sinc_table[i*st->filt_len+j] = sinc(st->cutoff,((j-st->filt_len/2+1)-((float)i)/st->den_rate), st->filt_len, quality_map[st->quality].window_func); + st->sinc_table[i*st->filt_len+j] = sinc(st->cutoff,((j-(spx_int32_t)st->filt_len/2+1)-((float)i)/st->den_rate), st->filt_len, quality_map[st->quality].window_func); } } #ifdef FIXED_POINT @@ -997,16 +998,19 @@ void speex_resampler_get_rate(SpeexResamplerState *st, spx_uint32_t *in_rate, sp int speex_resampler_set_rate_frac(SpeexResamplerState *st, spx_uint32_t ratio_num, spx_uint32_t ratio_den, spx_uint32_t in_rate, spx_uint32_t out_rate) { - int fact; + spx_uint32_t fact; + spx_uint32_t old_den; + spx_uint32_t i; if (st->in_rate == in_rate && st->out_rate == out_rate && st->num_rate == ratio_num && st->den_rate == ratio_den) return RESAMPLER_ERR_SUCCESS; + old_den = st->den_rate; st->in_rate = in_rate; st->out_rate = out_rate; st->num_rate = ratio_num; st->den_rate = ratio_den; /* FIXME: This is terribly inefficient, but who cares (at least for now)? */ - for (fact=2;fact<=sqrt(IMAX(in_rate, out_rate));fact++) + for (fact=2;fact<=IMIN(st->num_rate, st->den_rate);fact++) { while ((st->num_rate % fact == 0) && (st->den_rate % fact == 0)) { @@ -1015,6 +1019,17 @@ int speex_resampler_set_rate_frac(SpeexResamplerState *st, spx_uint32_t ratio_nu } } + if (old_den > 0) + { + for (i=0;i<st->nb_channels;i++) + { + st->samp_frac_num[i]=st->samp_frac_num[i]*st->den_rate/old_den; + /* Safety net */ + if (st->samp_frac_num[i] >= st->den_rate) + st->samp_frac_num[i] = st->den_rate-1; + } + } + if (st->initialised) update_filter(st); return RESAMPLER_ERR_SUCCESS; |