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#include <speex/speex_jitter.h>
#include "speex_jitter_buffer.h"
#ifndef NULL
#define NULL 0
#endif
void speex_jitter_init(SpeexJitter *jitter, void *decoder, int sampling_rate)
{
jitter->dec = decoder;
speex_decoder_ctl(decoder, SPEEX_GET_FRAME_SIZE, &jitter->frame_size);
jitter->packets = jitter_buffer_init(jitter->frame_size);
speex_bits_init(&jitter->current_packet);
jitter->valid_bits = 0;
}
void speex_jitter_destroy(SpeexJitter *jitter)
{
jitter_buffer_destroy(jitter->packets);
speex_bits_destroy(&jitter->current_packet);
}
void speex_jitter_put(SpeexJitter *jitter, char *packet, int len, int timestamp)
{
JitterBufferPacket p;
p.data = packet;
p.len = len;
p.timestamp = timestamp;
p.span = jitter->frame_size;
jitter_buffer_put(jitter->packets, &p);
}
void speex_jitter_get(SpeexJitter *jitter, spx_int16_t *out, int *current_timestamp)
{
int i;
int ret;
spx_int32_t activity;
char data[2048];
JitterBufferPacket packet;
packet.data = data;
packet.len = 2048;
if (jitter->valid_bits)
{
/* Try decoding last received packet */
ret = speex_decode_int(jitter->dec, &jitter->current_packet, out);
if (ret == 0)
{
jitter_buffer_tick(jitter->packets);
return;
} else {
jitter->valid_bits = 0;
}
}
ret = jitter_buffer_get(jitter->packets, &packet, jitter->frame_size, NULL);
if (ret != JITTER_BUFFER_OK)
{
/* No packet found */
/*fprintf (stderr, "lost/late frame\n");*/
/*Packet is late or lost*/
speex_decode_int(jitter->dec, NULL, out);
} else {
speex_bits_read_from(&jitter->current_packet, packet.data, packet.len);
/* Decode packet */
ret = speex_decode_int(jitter->dec, &jitter->current_packet, out);
if (ret == 0)
{
jitter->valid_bits = 1;
} else {
/* Error while decoding */
for (i=0;i<jitter->frame_size;i++)
out[i]=0;
}
}
speex_decoder_ctl(jitter->dec, SPEEX_GET_ACTIVITY, &activity);
if (activity < 30)
jitter_buffer_update_delay(jitter->packets, &packet, NULL);
jitter_buffer_tick(jitter->packets);
}
int speex_jitter_get_pointer_timestamp(SpeexJitter *jitter)
{
return jitter_buffer_get_pointer_timestamp(jitter->packets);
}
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