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| author | Paul Adenot <[email protected]> | 2020-07-28 16:37:07 +0200 |
|---|---|---|
| committer | Paul Adenot <[email protected]> | 2020-09-09 14:30:03 +0200 |
| commit | a7b68885cb7e5206c62fc86909cd25f3d391c74d (patch) | |
| tree | a7325b6affd58e12ef1f1a8cc2753fbfb3bc34b1 | |
| parent | bdc2040367fc49a3d7c80a48d77ac180b59231db (diff) | |
| download | cubeb-a7b68885cb7e5206c62fc86909cd25f3d391c74d.tar.gz cubeb-a7b68885cb7e5206c62fc86909cd25f3d391c74d.zip | |
Pre-feed the resampler with zeros to compensate for its latency
| -rw-r--r-- | src/cubeb_resampler_internal.h | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/src/cubeb_resampler_internal.h b/src/cubeb_resampler_internal.h index c497298..e676428 100644 --- a/src/cubeb_resampler_internal.h +++ b/src/cubeb_resampler_internal.h @@ -192,6 +192,21 @@ public: speex_resampler = speex_resampler_init(channels, source_rate, target_rate, quality, &r); assert(r == RESAMPLER_ERR_SUCCESS && "resampler allocation failure"); + + uint32_t ratio_num, ratio_den; + speex_resampler_get_ratio(speex_resampler, &ratio_num, &ratio_den); + uint32_t input_latency = speex_resampler_get_input_latency(speex_resampler); + int64_t skip_frac_num = input_latency * ratio_den; + T input_buffer[8192] = {}; + T output_buffer[8192] = {}; + uint32_t input_frame_count, output_frame_count; + input_frame_count = input_latency; + output_frame_count = 8192; + speex_resample( + input_buffer, + &input_frame_count, + output_buffer, + &output_frame_count); } /** Destructor, deallocate the resampler */ |