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audioconvert: fix mono channel mix test

Browse source 
When we have a single MONO channel, distribute and average. Otherwise,
use the logic to do proper mixing.

Adjust the unit test accordingly.
This commit is contained in:
Wim Taymans 2021-12-09 16:51:40 +01:00
parent ce02c7d435
commit 6b34b8c44e
4 changed files with 43 additions and 16 deletions
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24
spa/plugins/audioconvert/channelmix-ops.c
View file

@ -36,6 +36,10 @@
#include "channelmix-ops.h"
#undef SPA_LOG_TOPIC_DEFAULT
#define SPA_LOG_TOPIC_DEFAULT log_topic
struct spa_log_topic *log_topic = &SPA_LOG_TOPIC(0, "spa.channelmix");
#define _M(ch) (1UL << SPA_AUDIO_CHANNEL_ ## ch)
#define MASK_MONO _M(FC)|_M(MONO)|_M(UNKNOWN)
#define MASK_STEREO _M(FL)|_M(FR)|_M(UNKNOWN)
@ -159,24 +163,30 @@ static int make_matrix(struct channelmix *mix)
/* move the MONO mask to FRONT so that the lower bits can be shifted
* away. */
if ((src_mask & (1Ull << SPA_AUDIO_CHANNEL_MONO)) != 0)
src_mask |= (1ULL << SPA_AUDIO_CHANNEL_FC);
if ((dst_mask & (1Ull << SPA_AUDIO_CHANNEL_MONO)) != 0)
if ((src_mask & (1Ull << SPA_AUDIO_CHANNEL_MONO)) != 0) {
if (mix->src_chan == 1)
src_mask = 0;
else
src_mask |= (1ULL << SPA_AUDIO_CHANNEL_FC);
}
if ((dst_mask & (1Ull << SPA_AUDIO_CHANNEL_MONO)) != 0) {
if (mix->dst_chan == 1)
dst_mask = 0;
dst_mask |= (1ULL << SPA_AUDIO_CHANNEL_FC);
}
/* shift so that bit 0 is FL */
src_mask >>= 3;
dst_mask >>= 3;
/* unknown channels or just 1 channel */
if (src_mask == 0 || mix->src_chan == 1 ||
dst_mask == 0 || mix->dst_chan == 1) {
if (src_mask == FRONT && mix->src_chan == 1) {
if (src_mask == 0 || dst_mask == 0) {
if (mix->src_chan == 1) {
/* one FC/MONO src goes everywhere */
spa_log_debug(mix->log, "distribute FC/MONO");
for (i = 0; i < SPA_AUDIO_MAX_CHANNELS; i++)
matrix[i][0]= 1.0f;
} else if (dst_mask == FRONT && mix->dst_chan == 1) {
} else if (mix->dst_chan == 1) {
/* one FC/MONO dst get average of everything */
spa_log_debug(mix->log, "average FC/MONO");
for (i = 0; i < SPA_AUDIO_MAX_CHANNELS; i++)

4
spa/plugins/audioconvert/channelmix-ops.h
View file

@ -28,6 +28,10 @@
#include <spa/utils/defs.h>
#include <spa/param/audio/raw.h>
#undef SPA_LOG_TOPIC_DEFAULT
#define SPA_LOG_TOPIC_DEFAULT log_topic
extern struct spa_log_topic *log_topic;
#include "crossover.h"
#define VOLUME_MIN 0.0f

3
spa/plugins/audioconvert/channelmix.c
View file

@ -44,9 +44,6 @@
#include "channelmix-ops.h"
#undef SPA_LOG_TOPIC_DEFAULT
#define SPA_LOG_TOPIC_DEFAULT log_topic
static struct spa_log_topic *log_topic = &SPA_LOG_TOPIC(0, "spa.channelmix");
#define DEFAULT_RATE 48000
#define DEFAULT_CHANNELS 2

28
spa/plugins/audioconvert/test-channelmix.c
View file

@ -68,21 +68,36 @@ static void test_mix(uint32_t src_chan, uint32_t src_mask, uint32_t dst_chan, ui
dump_matrix(&mix, coeff);
}
static void test_1_N(void)
static void test_1_N_MONO(void)
{
test_mix(1, _M(MONO), 2, _M(FL)|_M(FR),
MATRIX(0.707107, 0.707107));
MATRIX(1.0, 1.0));
test_mix(1, _M(MONO), 3, _M(FL)|_M(FR)|_M(LFE),
MATRIX(0.707107, 0.707107, 0.0));
MATRIX(1.0, 1.0, 1.0));
test_mix(1, _M(MONO), 4, _M(FL)|_M(FR)|_M(LFE)|_M(FC),
MATRIX(0.0, 0.0, 1.0, 0.0));
MATRIX(1.0, 1.0, 1.0, 1.0));
test_mix(1, _M(MONO), 4, _M(FL)|_M(FR)|_M(RL)|_M(RR),
MATRIX(0.707107, 0.707107, 0.0, 0.0));
MATRIX(1.0, 1.0, 1.0, 1.0));
test_mix(1, _M(MONO), 12, 0,
MATRIX(1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0));
}
static void test_1_N_FC(void)
{
test_mix(1, _M(FC), 2, _M(FL)|_M(FR),
MATRIX(0.707107, 0.707107));
test_mix(1, _M(FC), 3, _M(FL)|_M(FR)|_M(LFE),
MATRIX(0.707107, 0.707107, 0.0));
test_mix(1, _M(FC), 4, _M(FL)|_M(FR)|_M(LFE)|_M(FC),
MATRIX(0.0, 0.0, 1.0, 0.0));
test_mix(1, _M(FC), 4, _M(FL)|_M(FR)|_M(RL)|_M(RR),
MATRIX(0.707107, 0.707107, 0.0, 0.0));
test_mix(1, _M(FC), 12, 0,
MATRIX(1.0, 1.0, 1.0, 1.0, 1.0, 1.0,
1.0, 1.0, 1.0, 1.0, 1.0, 1.0));
}
static void test_N_1(void)
{
test_mix(1, _M(MONO), 1, _M(MONO),
@ -203,7 +218,8 @@ int main(int argc, char *argv[])
{
logger.log.level = SPA_LOG_LEVEL_TRACE;
test_1_N();
test_1_N_MONO();
test_1_N_FC();
test_N_1();
test_3p1_N();
test_4_N();