Add RTCP RR helpers

ietf/rtcp_rr.h

@@ -0,0 +1,110 @@
+#ifndef __BITSTREAM_IETF_RTCP_RR_H__
+# define __BITSTREAM_IETF_RTCP_RR_H__
+
+# include <inttypes.h>
+# include <bitstream/ietf/rtcp.h>
+
+# define RTCP_RR_SIZE 32
+
+# define RTCP_PT_RR 201
+
+static inline void rtcp_rr_set_pt(uint8_t *p_rtcp_rr)
+{
+    rtcp_set_pt(p_rtcp_rr, RTCP_PT_RR);
+}
+
+static inline uint8_t rtcp_rr_get_fraction_lost(const uint8_t *p_rtcp_rr)
+{
+    return p_rtcp_rr[12];
+}
+
+static inline void rtcp_rr_set_fraction_lost(uint8_t *p_rtcp_rr, uint8_t fraction_lost)
+{
+    p_rtcp_rr[12] = fraction_lost;
+}
+
+static inline int32_t rtcp_rr_get_cumulative_packets_lost(const uint8_t *p_rtcp_rr)
+{
+    uint32_t u = (p_rtcp_rr[13] << 16) | (p_rtcp_rr[14] << 8) | p_rtcp_rr[15];
+    if (u & 0x800000)
+        return -(u & 0x7fffff);
+    else
+        return u;
+}
+
+static inline void rtcp_rr_set_cumulative_packets_lost(uint8_t *p_rtcp_rr,
+        int32_t packets_lost)
+{
+    if (packets_lost > 0x7fffff)
+        packets_lost = 0x7fffff;
+    else if (packets_lost < -0x800000)
+        packets_lost = -0x800000;
+
+    int neg = packets_lost < 0;
+    uint32_t u = neg ? -packets_lost : packets_lost;
+
+    p_rtcp_rr[13] = (neg << 7) | (u >> 16) & 0x7f;
+    p_rtcp_rr[14] = (u >>  8) & 0xff;
+    p_rtcp_rr[15] =  u        & 0xff;
+}
+
+static inline uint32_t rtcp_rr_get_highest_seqnum(const uint8_t *p_rtcp_rr)
+{
+    return (p_rtcp_rr[16] << 24) | (p_rtcp_rr[17] << 16) |
+           (p_rtcp_rr[18] << 8) | p_rtcp_rr[19];
+}
+
+static inline void rtcp_rr_set_highest_seqnum(uint8_t *p_rtcp_rr,
+        uint32_t highest_seqnum)
+{
+    p_rtcp_rr[16] = (highest_seqnum >> 24) & 0xff;
+    p_rtcp_rr[17] = (highest_seqnum >> 16) & 0xff;
+    p_rtcp_rr[18] = (highest_seqnum >> 8) & 0xff;
+    p_rtcp_rr[19] = highest_seqnum & 0xff;
+}
+
+static inline uint32_t rtcp_rr_get_inter_arrival_jitter(const uint8_t *p_rtcp_rr)
+{
+    return (p_rtcp_rr[20] << 24) | (p_rtcp_rr[21] << 16) |
+           (p_rtcp_rr[22] << 8) | p_rtcp_rr[23];
+}
+
+static inline void rtcp_rr_set_inter_arrival_jitter(uint8_t *p_rtcp_rr,
+        uint32_t inter_arrival_jitter)
+{
+    p_rtcp_rr[20] = (inter_arrival_jitter >> 24) & 0xff;
+    p_rtcp_rr[21] = (inter_arrival_jitter >> 16) & 0xff;
+    p_rtcp_rr[22] = (inter_arrival_jitter >> 8) & 0xff;
+    p_rtcp_rr[23] = inter_arrival_jitter & 0xff;
+}
+
+static inline uint32_t rtcp_rr_get_last_sr(const uint8_t *p_rtcp_rr)
+{
+    return (p_rtcp_rr[24] << 24) | (p_rtcp_rr[25] << 16) |
+           (p_rtcp_rr[26] << 8) | p_rtcp_rr[27];
+}
+
+static inline void rtcp_rr_set_last_sr(uint8_t *p_rtcp_rr,
+        uint32_t last_sr)
+{
+    p_rtcp_rr[24] = (last_sr >> 24) & 0xff;
+    p_rtcp_rr[25] = (last_sr >> 16) & 0xff;
+    p_rtcp_rr[26] = (last_sr >> 8) & 0xff;
+    p_rtcp_rr[27] = last_sr & 0xff;
+}
+
+static inline uint32_t rtcp_rr_get_delay_since_last_sr(const uint8_t *p_rtcp_rr)
+{
+    return (p_rtcp_rr[28] << 24) | (p_rtcp_rr[29] << 16) |
+           (p_rtcp_rr[30] << 8) | p_rtcp_rr[31];
+}
+
+static inline void rtcp_rr_set_delay_since_last_sr(uint8_t *p_rtcp_rr,
+        uint32_t delay_since_last_sr)
+{
+    p_rtcp_rr[28] = (delay_since_last_sr >> 24) & 0xff;
+    p_rtcp_rr[29] = (delay_since_last_sr >> 16) & 0xff;
+    p_rtcp_rr[30] = (delay_since_last_sr >> 8) & 0xff;
+    p_rtcp_rr[31] = delay_since_last_sr & 0xff;
+}
+#endif /* !__BITSTREAM_IETF_RTCP_RR_H__ */