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Use nanors for optimized Reed-Solomon FEC decoding (#125)

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This commit is contained in:
Andy Grundman
2026-02-19 00:36:52 -05:00
committed by GitHub
parent 1d0e91d91a
commit de364b6ecd
16 changed files with 5493 additions and 689 deletions
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5
src/RtpAudioQueue.c
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@@ -55,8 +55,7 @@ void RtpaInitializeQueue(PRTP_AUDIO_QUEUE queue) {
// works correctly. This is possible because the data and FEC shard count is
// constant and known in advance.
const unsigned char parity[] = { 0x77, 0x40, 0x38, 0x0e, 0xc7, 0xa7, 0x0d, 0x6c };
memcpy(&queue->rs->m[16], parity, sizeof(parity));
memcpy(queue->rs->parity, parity, sizeof(parity));
memcpy(queue->rs->p, parity, sizeof(parity));
}
static void validateFecBlockState(PRTP_AUDIO_QUEUE queue) {
@@ -444,7 +443,7 @@ static bool completeFecBlock(PRTP_AUDIO_QUEUE queue, PRTPA_FEC_BLOCK block) {
memset(block->dataPackets[dropIndex], 0, sizeof(RTP_PACKET) + block->blockSize);
#endif
int res = reed_solomon_reconstruct(queue->rs, shards, block->marks, RTPA_TOTAL_SHARDS, block->blockSize);
int res = reed_solomon_decode(queue->rs, shards, block->marks, RTPA_TOTAL_SHARDS, block->blockSize);
if (res != 0) {
// We should always have enough data to recover the entire block since we checked above.
LC_ASSERT(res == 0);