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combined channels - release

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This commit is contained in:
Philippe G
2021-02-20 17:34:25 -08:00
parent 9717f8288e
commit 3f0882ead6
3 changed files with 41 additions and 5 deletions
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4
components/squeezelite/output.c
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@@ -254,8 +254,8 @@ frames_t _output_frames(frames_t avail) {
out_frames = !silence ? min(size, cont_frames) : size;
if (output.channels & 0x01) gainR = COPY_MONO;
else if (output.channels & 0x02) gainL = COPY_MONO;
if (output.channels & 0x01) gainR |= MONO_FLAG;
if (output.channels & 0x02) gainL |= MONO_FLAG;
wrote = output.write_cb(out_frames, silence, gainL, gainR, cross_gain_in, cross_gain_out, &cross_ptr);

40
components/squeezelite/output_pack.c
View File

@@ -50,6 +50,34 @@ s32_t to_gain(float f) {
}
void _scale_and_pack_frames(void *outputptr, s32_t *inputptr, frames_t cnt, s32_t gainL, s32_t gainR, output_format format) {
// in-place copy input samples if mono/combined is used (never happens with DSD active)
if ((gainR & MONO_FLAG) && (gainL & MONO_FLAG)) {
s32_t *ptr = inputptr;
frames_t count = cnt;
gainL &= ~MONO_FLAG; gainR &= ~MONO_FLAG;
while (count--) {
// use 64 bits integer for purists but should really not care
*ptr = *(ptr + 1) = ((s64_t) gain(gainL, *ptr) + (s64_t) gain(gainR, *(ptr + 1))) / 2;
ptr += 2;
}
} else if (gainL & MONO_FLAG) {
s32_t *ptr = inputptr + 1;
frames_t count = cnt;
gainL &= ~MONO_FLAG;
while (count--) {
*(ptr - 1) = *ptr;
ptr += 2;
}
} else if (gainR & MONO_FLAG) {
s32_t *ptr = inputptr;
frames_t count = cnt;
gainR &= ~MONO_FLAG;
while (count--) {
*(ptr + 1) = *ptr;
ptr += 2;
}
}
switch(format) {
#if DSD
case U32_LE:
@@ -364,13 +392,21 @@ inline
void _apply_gain(struct buffer *outputbuf, frames_t count, s32_t gainL, s32_t gainR) {
if (gainL == FIXED_ONE && gainR == FIXED_ONE) {
return;
} else if (gainL == COPY_MONO) {
} if ((gainR & MONO_FLAG) && (gainL & MONO_FLAG)) {
ISAMPLE_T *ptrL = (ISAMPLE_T *)(void *)outputbuf->readp;
ISAMPLE_T *ptrR = (ISAMPLE_T *)(void *)outputbuf->readp + 1;
gainL &= ~MONO_FLAG; gainR &= ~MONO_FLAG;
while (count--) {
*ptrL = *ptrR = (gain(gainL, *ptrL) + gain(gainR, *ptrR)) / 2;
ptrL += 2; ptrR += 2;
}
} else if (gainL & MONO_FLAG) {
ISAMPLE_T *ptr = (ISAMPLE_T *)(void *)outputbuf->readp + 1;
while (count--) {
*(ptr - 1) = *ptr = gain(gainR, *ptr);
ptr += 2;
}
} else if (gainR == COPY_MONO) {
} else if (gainR & MONO_FLAG) {
ISAMPLE_T *ptr = (ISAMPLE_T *)(void *)outputbuf->readp;
while (count--) {
*(ptr + 1) = *ptr = gain(gainL, *ptr);

2
components/squeezelite/squeezelite.h
View File

@@ -472,7 +472,7 @@ void _wake_create(event_event*);
#define MAX_SILENCE_FRAMES 2048
#define FIXED_ONE 0x10000
#define COPY_MONO (FIXED_ONE + 1)
#define MONO_FLAG 0x20000
#ifndef BYTES_PER_FRAME
#define BYTES_PER_FRAME 8