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DSD gaplessness, part 2 

We should be extrapolating right over top of the DSD decimator latency,
rather than in front of it. Yeah, that'll do.

Signed-off-by: Christopher Snowhill <kode54@gmail.com>
CQTexperiment
Christopher Snowhill 2022-02-15 02:11:53 -08:00
parent 4b0f6b381f
commit bec01b675a
1 changed files with 5 additions and 8 deletions
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13
Audio/Chain/ConverterNode.m
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@ -631,7 +631,9 @@ tryagain:
if(!skipResampler && !is_preextrapolated_) {
size_t samples_in_buffer = bytesReadFromInput / floatFormat.mBytesPerPacket;
size_t prime = min(samples_in_buffer, PRIME_LEN_);
size_t newSize = N_samples_to_add_ * floatFormat.mBytesPerPacket;
size_t _N_samples_to_add_ = N_samples_to_add_;
if(dsd2pcm) _N_samples_to_add_ += dsd2pcmLatency;
size_t newSize = _N_samples_to_add_ * floatFormat.mBytesPerPacket;
newSize += bytesReadFromInput;
if(newSize > inputBufferSize) {
@ -650,8 +652,8 @@ tryagain:
memmove(inputBuffer + N_samples_to_add_ * floatFormat.mBytesPerPacket, inputBuffer + bytesToSkip, bytesReadFromInput);
lpc_extrapolate_bkwd(inputBuffer + N_samples_to_add_ * floatFormat.mBytesPerPacket, samples_in_buffer, prime, floatFormat.mChannelsPerFrame, LPC_ORDER, N_samples_to_add_, &extrapolateBuffer, &extrapolateBufferSize);
bytesReadFromInput += N_samples_to_add_ * floatFormat.mBytesPerPacket;
lpc_extrapolate_bkwd(inputBuffer + _N_samples_to_add_ * floatFormat.mBytesPerPacket, samples_in_buffer, prime, floatFormat.mChannelsPerFrame, LPC_ORDER, _N_samples_to_add_, &extrapolateBuffer, &extrapolateBufferSize);
bytesReadFromInput += _N_samples_to_add_ * floatFormat.mBytesPerPacket;
latencyEaten = N_samples_to_drop_;
if(dsd2pcm) latencyEaten += (int)ceil(dsd2pcmLatency * sampleRatio);
is_preextrapolated_ = 2;
@ -663,11 +665,6 @@ tryagain:
if(is_postextrapolated_ == 1) {
size_t samples_in_buffer = bytesReadFromInput / floatFormat.mBytesPerPacket;
if(dsd2pcm) {
if(samples_in_buffer >= dsd2pcmLatency)
samples_in_buffer -= dsd2pcmLatency;
}
size_t prime = min(samples_in_buffer, PRIME_LEN_);
size_t newSize = bytesReadFromInput;