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Audio rework, new jitter buffer

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Jitter buffer is now based on packets, not on samples. The frames are
dejittered in received form. After reading from jitter buffer, they are
decoded in correct order. If a frame is missing, it is concealed by
repeating audio.
This commit is contained in:
Andreas Eversberg
2024-03-10 13:45:08 +01:00
parent e7efcee289
commit a20637825a
40 changed files with 865 additions and 572 deletions
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src/bnetz/dsp.c
+32 -1
View File
@@ -373,7 +373,11 @@ again:
case DSP_MODE_AUDIO:
case DSP_MODE_AUDIO_METER:
input_num = samplerate_upsample_input_num(&sender->srstate, length);
jitter_load(&sender->dejitter, samples, input_num);
{
int16_t spl[input_num];
jitter_load_samples(&sender->dejitter, (uint8_t *)spl, input_num, sizeof(*spl), jitter_conceal_s16, NULL);
int16_to_samples_speech(samples, spl, input_num);
}
samplerate_upsample(&sender->srstate, samples, input_num, samples, length);
if (bnetz->dsp_mode == DSP_MODE_AUDIO_METER)
metering_tone(bnetz, samples, length);
@@ -422,8 +426,35 @@ void bnetz_set_dsp_mode(bnetz_t *bnetz, enum dsp_mode mode)
bnetz->tx_telegramm = 0;
fsk_mod_reset(&bnetz->fsk_mod);
}
if ((mode == DSP_MODE_AUDIO || mode == DSP_MODE_AUDIO_METER) && (bnetz->dsp_mode != DSP_MODE_AUDIO && bnetz->dsp_mode != DSP_MODE_AUDIO_METER))
jitter_reset(&bnetz->sender.dejitter);
LOGP_CHAN(DDSP, LOGL_DEBUG, "DSP mode %s -> %s\n", bnetz_dsp_mode_name(bnetz->dsp_mode), bnetz_dsp_mode_name(mode));
bnetz->dsp_mode = mode;
}
/* Receive audio from call instance. */
void call_down_audio(void *decoder, void *decoder_priv, int callref, uint16_t sequence, uint8_t marker, uint32_t timestamp, uint32_t ssrc, uint8_t *payload, int payload_len)
{
sender_t *sender;
bnetz_t *bnetz;
for (sender = sender_head; sender; sender = sender->next) {
bnetz = (bnetz_t *) sender;
if (bnetz->callref == callref)
break;
}
if (!sender)
return;
if (bnetz->dsp_mode == DSP_MODE_AUDIO
|| bnetz->dsp_mode == DSP_MODE_AUDIO_METER) {
jitter_frame_t *jf;
jf = jitter_frame_alloc(decoder, decoder_priv, payload, payload_len, marker, sequence, timestamp, ssrc);
if (jf)
jitter_save(&bnetz->sender.dejitter, jf);
}
}
void call_down_clock(void) {}