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| author | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2016-05-31 20:49:41 -0400 |
|---|---|---|
| committer | Jean-Marc Valin <jmvalin@jmvalin.ca> | 2016-07-17 15:05:54 -0400 |
| commit | 691f6f931b69e85d2a31838313bdd7d04ba460c0 (patch) | |
| tree | d26b1981e96e7fe4bc63ce3cfc075d6e092bc857 | |
| parent | 78fc664c0c339c5fa73409fca56126cc65452566 (diff) | |
| download | opus-691f6f931b69e85d2a31838313bdd7d04ba460c0.tar.gz | |
Fixing bandwidth selection hysteresis
Previously, the bandwidth detection could (e.g.) change the bandwidth
from fullband to superwideband, and the hysteresis would then cause
bandwidth to be stuck in superwideband.
| -rw-r--r-- | src/opus_encoder.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/src/opus_encoder.c b/src/opus_encoder.c index 671e8d21..49f9f5b5 100644 --- a/src/opus_encoder.c +++ b/src/opus_encoder.c @@ -102,6 +102,8 @@ struct OpusEncoder { int prev_channels; int prev_framesize; int bandwidth; + /* Bandwidth determined automatically from the rate (before any other adjustment) */ + int auto_bandwidth; int silk_bw_switch; /* Sampling rate (at the API level) */ int first; @@ -1477,7 +1479,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_ hysteresis = bandwidth_thresholds[2*(bandwidth-OPUS_BANDWIDTH_MEDIUMBAND)+1]; if (!st->first) { - if (st->bandwidth >= bandwidth) + if (st->auto_bandwidth >= bandwidth) threshold -= hysteresis; else threshold += hysteresis; @@ -1485,7 +1487,7 @@ opus_int32 opus_encode_native(OpusEncoder *st, const opus_val16 *pcm, int frame_ if (equiv_rate >= threshold) break; } while (--bandwidth>OPUS_BANDWIDTH_NARROWBAND); - st->bandwidth = bandwidth; + st->bandwidth = st->auto_bandwidth = bandwidth; /* Prevents any transition to SWB/FB until the SILK layer has fully switched to WB mode and turned the variable LP filter off */ if (!st->first && st->mode != MODE_CELT_ONLY && !st->silk_mode.inWBmodeWithoutVariableLP && st->bandwidth > OPUS_BANDWIDTH_WIDEBAND) |