static int _write_frames(frames_t out_frames, bool silence, s32_t gainL, s32_t gainR,
s32_t cross_gain_in, s32_t cross_gain_out, s32_t **cross_ptr) {
const snd_pcm_channel_area_t *areas;
snd_pcm_uframes_t offset;
void *outputptr;
s32_t *inputptr;
int err;
if (alsa.mmap) {
snd_pcm_uframes_t alsa_frames = (snd_pcm_uframes_t)out_frames;
snd_pcm_avail_update(pcmp);
if ((err = snd_pcm_mmap_begin(pcmp, &areas, &offset, &alsa_frames)) < 0) {
LOG_WARN("error from mmap_begin: %s", snd_strerror(err));
return -1;
}
out_frames = (frames_t)alsa_frames;
}
if (!silence) {
// applying cross fade is delayed until this point as mmap_begin can change out_frames
if (output.fade == FADE_ACTIVE && output.fade_dir == FADE_CROSS && *cross_ptr) {
_apply_cross(outputbuf, out_frames, cross_gain_in, cross_gain_out, cross_ptr);
}
}
inputptr = (s32_t *) (silence ? silencebuf : outputbuf->readp);
IF_DSD(
if (output.dop) {
if (silence) {
inputptr = (s32_t *) silencebuf_dop;
}
update_dop((u32_t *) inputptr, out_frames, output.invert && !silence);
}
)
if (alsa.mmap || alsa.format != NATIVE_FORMAT) {
static int _write_frames(frames_t out_frames, bool silence, s32_t gainL, s32_t gainR,
s32_t cross_gain_in, s32_t cross_gain_out, s32_t **cross_ptr) {
if (!silence) {
if (output.fade == FADE_ACTIVE && output.fade_dir == FADE_CROSS && *cross_ptr) {
_apply_cross(outputbuf, out_frames, cross_gain_in, cross_gain_out, cross_ptr);
}
if (gainL != FIXED_ONE || gainR!= FIXED_ONE) {
_apply_gain(outputbuf, out_frames, gainL, gainR);
}
IF_DSD(
if (output.dop) {
update_dop_marker((u32_t *) outputbuf->readp, out_frames);
}
)
memcpy(optr, outputbuf->readp, out_frames * BYTES_PER_FRAME);
} else {
