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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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32
src/imts/dsp.c
View File

@@ -297,7 +297,11 @@ again:
case DSP_MODE_AUDIO:
memset(power, 1, length);
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 (imts->pre_emphasis)
pre_emphasis(&imts->estate, samples, length);
@@ -549,6 +553,8 @@ void imts_set_dsp_mode(imts_t *imts, enum dsp_mode mode, int tone, double durati
imts->demod_duration = 0.0;
}
if (mode == DSP_MODE_AUDIO && imts->dsp_mode != mode)
jitter_reset(&imts->sender.dejitter);
if (imts->dsp_mode != mode) {
LOGP_CHAN(DDSP, LOGL_DEBUG, "DSP mode %s -> %s\n", imts_dsp_mode_name(imts->dsp_mode), imts_dsp_mode_name(mode));
imts->dsp_mode = mode;
@@ -564,3 +570,27 @@ void imts_set_dsp_mode(imts_t *imts, enum dsp_mode mode, int tone, double durati
}
}
/* 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;
imts_t *imts;
for (sender = sender_head; sender; sender = sender->next) {
imts = (imts_t *) sender;
if (imts->callref == callref)
break;
}
if (!sender)
return;
if (imts->dsp_mode == DSP_MODE_AUDIO) {
jitter_frame_t *jf;
jf = jitter_frame_alloc(decoder, decoder_priv, payload, payload_len, marker, sequence, timestamp, ssrc);
if (jf)
jitter_save(&imts->sender.dejitter, jf);
}
}
void call_down_clock(void) {}

21
src/imts/imts.c
View File

@@ -1290,26 +1290,5 @@ void call_down_release(int callref, __attribute__((unused)) int cause)
}
}
/* Receive audio from call instance. */
void call_down_audio(int callref, uint16_t sequence, uint32_t timestamp, uint32_t ssrc, sample_t *samples, int count)
{
sender_t *sender;
imts_t *imts;
for (sender = sender_head; sender; sender = sender->next) {
imts = (imts_t *) sender;
if (imts->callref == callref)
break;
}
if (!sender)
return;
if (imts->dsp_mode == DSP_MODE_AUDIO) {
jitter_save(&imts->sender.dejitter, samples, count, 1, sequence, timestamp, ssrc);
}
}
void call_down_clock(void) {}
void dump_info(void) {}