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This commit is contained in:
fduncanh
2022-06-15 12:58:31 -04:00
parent 1be1ef2612
commit c8210c9c60
1 changed files with 5 additions and 6 deletions
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11
lib/raop_rtp.c
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@@ -58,8 +58,7 @@ struct raop_rtp_s {
uint64_t rtp_start_time;
uint64_t rtp_time;
bool rtp_clock_started;
// Transmission Stats, could be used if a playout buffer is needed
// float interarrival_jitter; // As defined by RTP RFC 3550, Section 6.4.1
// unsigned int last_packet_transit_time;
@@ -420,7 +419,7 @@ uint64_t rtp64_time (raop_rtp_t *raop_rtp, const uint32_t *rtp32) {
* using 64-bit rtp time avoids any epoch issues.
* initial call sets epoch to 1; subsequent calls maintain consistent epoch.
* (assumes successive calls are close in time) */
if (raop_rtp->rtp_clock_started) {
uint32_t diff1 = *rtp32 - ((uint32_t) raop_rtp->rtp_time);
uint32_t diff2 = ((uint32_t) raop_rtp->rtp_time) - *rtp32;
@@ -533,7 +532,7 @@ raop_rtp_thread_udp(void *arg)
// The unit for the rtp clock is 1 / sample rate = 1 / 44100
int64_t sync_rtp64, sync_ntp;
uint32_t sync_rtp = byteutils_get_int_be(packet, 4);
uint64_t rtp_time = rtp64_time(raop_rtp, &sync_rtp);
uint64_t rtp_time = rtp64_time(raop_rtp, &sync_rtp);
sync_rtp64 = ((int64_t) rtp_time) - ((int64_t) raop_rtp->rtp_start_time);
if (have_synced == false) {
@@ -583,7 +582,7 @@ raop_rtp_thread_udp(void *arg)
* both have PCM uncompressed sampling rate = 441000 Hz */
/* clock time in microseconds advances at (rtp_timestamp * 1000000)/44100 between frames */
/* every AAC-ELD packet is sent three times: 0 0 1 0 1 2 1 2 3 2 3 4 ...
* (after decoding AAC-ELD into PCM, the sound frame is three times bigger)
* ALAC packets are sent once only 0 1 2 3 4 5 ... */
@@ -635,7 +634,7 @@ raop_rtp_thread_udp(void *arg)
default:
break;
}
initial_offset = delay - sync_ntp;
initial_offset = delay - sync_ntp;
raop_rtp->rtp_sync_offset = initial_offset;
sync_adjustment = 0;
seqnum1 = seqnum;