diff options
Diffstat (limited to 'openbsc/src/libmgcp/mgcp_protocol.c')
| -rw-r--r-- | openbsc/src/libmgcp/mgcp_protocol.c | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/openbsc/src/libmgcp/mgcp_protocol.c b/openbsc/src/libmgcp/mgcp_protocol.c index b8e1ecde4..ab941645e 100644 --- a/openbsc/src/libmgcp/mgcp_protocol.c +++ b/openbsc/src/libmgcp/mgcp_protocol.c @@ -75,7 +75,7 @@ char *strline_r(char *str, char **saveptr) /* Assume audio frame length of 20ms */ #define DEFAULT_RTP_AUDIO_FRAME_DUR_NUM 20 #define DEFAULT_RTP_AUDIO_FRAME_DUR_DEN 1000 -#define DEFAULT_RTP_AUDIO_FRAMES_PER_PACKET 1 +#define DEFAULT_RTP_AUDIO_PACKET_DURATION_MS 20 #define DEFAULT_RTP_AUDIO_DEFAULT_RATE 8000 static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end); @@ -631,6 +631,23 @@ void mgcp_rtp_end_config(struct mgcp_endpoint *endp, int expect_ssrc_change, rtp->force_constant_ssrc ? ", force constant ssrc" : ""); } +uint32_t mgcp_rtp_packet_duration(struct mgcp_endpoint *endp, + struct mgcp_rtp_end *rtp) +{ + int f = 0; + + /* Get the number of frames per channel and packet */ + if (rtp->frames_per_packet) + f = rtp->frames_per_packet; + else if (rtp->packet_duration_ms && rtp->frame_duration_num) { + int den = 1000 * rtp->frame_duration_num; + f = (rtp->packet_duration_ms * rtp->frame_duration_den + den/2) + / den; + } + + return rtp->rate * f * rtp->frame_duration_num / rtp->frame_duration_den; +} + static struct msgb *handle_create_con(struct mgcp_parse_data *p) { struct mgcp_trunk_config *tcfg; @@ -1086,8 +1103,9 @@ static void mgcp_rtp_end_reset(struct mgcp_rtp_end *end) /* Set default values */ end->frame_duration_num = DEFAULT_RTP_AUDIO_FRAME_DUR_NUM; end->frame_duration_den = DEFAULT_RTP_AUDIO_FRAME_DUR_DEN; - end->frames_per_packet = DEFAULT_RTP_AUDIO_FRAMES_PER_PACKET; - end->rate = DEFAULT_RTP_AUDIO_DEFAULT_RATE; + end->frames_per_packet = 0; /* unknown */ + end->packet_duration_ms = DEFAULT_RTP_AUDIO_PACKET_DURATION_MS; + end->rate = DEFAULT_RTP_AUDIO_DEFAULT_RATE; } static void mgcp_rtp_end_init(struct mgcp_rtp_end *end) |