diff options
| author | Bent Bisballe Nyeng <deva@aasimon.org> | 2016-06-13 16:26:19 +0200 |
|---|---|---|
| committer | Bent Bisballe Nyeng <deva@aasimon.org> | 2016-06-13 16:26:19 +0200 |
| commit | 1bc07f860fa7f01763586f45b7fb2e53cd1c2557 (patch) | |
| tree | f11e1ffa18f57b5d12b479e99975a2bac9995075 /src/chresampler.cc | |
| parent | aa4528af0f813d604f62ce1b6e3a6ca92f127993 (diff) | |
Initialise the zita resampler correctly to avoid latency.
Diffstat (limited to 'src/chresampler.cc')
| -rw-r--r-- | src/chresampler.cc | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/src/chresampler.cc b/src/chresampler.cc index c3c19bf..94737c6 100644 --- a/src/chresampler.cc +++ b/src/chresampler.cc @@ -76,9 +76,20 @@ void CHResampler::setup(double input_fs, double output_fs) DEBUG(resampler, "Using zita-resampler (%d -> %d)", (int)input_fs, (int)output_fs); - int hlen = 72; // 16 ≤ hlen ≤ 96 // delay is 2 * hlen, 72 corresponds to delay introduced by SRC. + int hlen = 72; // 16 ≤ hlen ≤ 96 + + prv->zita.reset(); prv->zita.setup(input_fs, output_fs, nchan, hlen); + + std::size_t null_size = prv->zita.inpsize() / 2 - 1; + prv->zita.inp_data = nullptr; + prv->zita.inp_count = null_size; + + prv->zita.out_data = nullptr; + prv->zita.out_count = 1024 * 1024; + + prv->zita.process(); #elif defined(USE_SRC) DEBUG(resampler, "Using libsamplerate (%d -> %d)", (int)input_fs, (int)output_fs); @@ -141,8 +152,13 @@ void CHResampler::process() std::size_t CHResampler::getLatency() const { + if (input_fs == output_fs) + { + return 0; + } + #if defined(USE_ZITA) - return prv->zita.inpdist(); + return 0; #elif defined(USE_SRC) return 0; // TODO? #endif |