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kvm
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Cleanup, Optimizations: Small aaudio optimizations

This commit is contained in:
Alex P 2025-09-16 15:37:23 +03:00
parent 7ffb9e1d59
commit 8a3f1b6c32
2 changed files with 16 additions and 9 deletions
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1
.gitignore vendored
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@ -11,3 +11,4 @@ tmp/
device-tests.tar.gz
CLAUDE.md
.claude/

24
internal/audio/c/audio.c
View File

@ -49,7 +49,7 @@ static int max_attempts_global = 5; // Maximum retry attempts
static int max_backoff_us_global = 500000; // Maximum backoff time
// Performance optimization flags
static int optimized_buffer_size = 1; // Use optimized buffer sizing
static const int optimized_buffer_size = 1; // Use optimized buffer sizing
static int trace_logging_enabled = 0; // Enable detailed trace logging
// ============================================================================
@ -395,9 +395,12 @@ int jetkvm_audio_capture_init() {
* 0: No audio data available (not an error)
* -1: Initialization error or unrecoverable failure
*/
int jetkvm_audio_read_encode(void *opus_buf) {
static short pcm_buffer[1920]; // max 2ch*960
unsigned char *out = (unsigned char*)opus_buf;
__attribute__((hot)) int jetkvm_audio_read_encode(void *opus_buf) {
static short __attribute__((aligned(16))) pcm_buffer[1920]; // max 2ch*960, aligned for SIMD
unsigned char * __restrict__ out = (unsigned char*)opus_buf;
// Prefetch output buffer for better cache performance
__builtin_prefetch(out, 1, 3);
int err = 0;
int recovery_attempts = 0;
const int max_recovery_attempts = 3;
@ -483,8 +486,8 @@ retry_read:
}
// If we got fewer frames than expected, pad with silence
if (pcm_rc < frame_size) {
memset(&pcm_buffer[pcm_rc * channels], 0, (frame_size - pcm_rc) * channels * sizeof(short));
if (__builtin_expect(pcm_rc < frame_size, 0)) {
__builtin_memset(&pcm_buffer[pcm_rc * channels], 0, (frame_size - pcm_rc) * channels * sizeof(short));
}
int nb_bytes = opus_encode(encoder, pcm_buffer, frame_size, out, max_packet_size);
@ -594,9 +597,12 @@ int jetkvm_audio_playback_init() {
* -1: Invalid input or decode failure
* -2: Unrecoverable ALSA error
*/
int jetkvm_audio_decode_write(void *opus_buf, int opus_size) {
static short pcm_buffer[1920]; // max 2ch*960
unsigned char *in = (unsigned char*)opus_buf;
__attribute__((hot)) int jetkvm_audio_decode_write(void *opus_buf, int opus_size) {
static short __attribute__((aligned(16))) pcm_buffer[1920]; // max 2ch*960, aligned for SIMD
unsigned char * __restrict__ in = (unsigned char*)opus_buf;
// Prefetch input buffer for better cache performance
__builtin_prefetch(in, 0, 3);
int err = 0;
int recovery_attempts = 0;
const int max_recovery_attempts = 3;