move H.264 packetization code from avcodec to core

1 files changed, 71 insertions, 0 deletions

diff --git a/include/baresip.h b/include/baresip.h
index 67fef23..b607166 100644
--- a/include/baresip.h
+++ b/include/baresip.h
@@ -923,6 +923,77 @@ int sip_req_send(struct ua *ua, const char *method, const char *uri,
 
 
 /*
+ * H.264
+ */
+
+/** NAL unit types (RFC 3984, Table 1) */
+enum {
+	H264_NAL_UNKNOWN      = 0,
+	/* 1-23   NAL unit  Single NAL unit packet per H.264 */
+	H264_NAL_SLICE        = 1,
+	H264_NAL_DPA          = 2,
+	H264_NAL_DPB          = 3,
+	H264_NAL_DPC          = 4,
+	H264_NAL_IDR_SLICE    = 5,
+	H264_NAL_SEI          = 6,
+	H264_NAL_SPS          = 7,
+	H264_NAL_PPS          = 8,
+	H264_NAL_AUD          = 9,
+	H264_NAL_END_SEQUENCE = 10,
+	H264_NAL_END_STREAM   = 11,
+	H264_NAL_FILLER_DATA  = 12,
+	H264_NAL_SPS_EXT      = 13,
+	H264_NAL_AUX_SLICE    = 19,
+
+	H264_NAL_STAP_A       = 24,  /**< Single-time aggregation packet */
+	H264_NAL_STAP_B       = 25,  /**< Single-time aggregation packet */
+	H264_NAL_MTAP16       = 26,  /**< Multi-time aggregation packet  */
+	H264_NAL_MTAP24       = 27,  /**< Multi-time aggregation packet  */
+	H264_NAL_FU_A         = 28,  /**< Fragmentation unit             */
+	H264_NAL_FU_B         = 29,  /**< Fragmentation unit             */
+};
+
+/**
+ * H.264 Header defined in RFC 3984
+ *
+ * <pre>
+      +---------------+
+      |0|1|2|3|4|5|6|7|
+      +-+-+-+-+-+-+-+-+
+      |F|NRI|  Type   |
+      +---------------+
+ * </pre>
+ */
+struct h264_hdr {
+	unsigned f:1;      /**< 1 bit  - Forbidden zero bit (must be 0) */
+	unsigned nri:2;    /**< 2 bits - nal_ref_idc                    */
+	unsigned type:5;   /**< 5 bits - nal_unit_type                  */
+};
+
+int h264_hdr_encode(const struct h264_hdr *hdr, struct mbuf *mb);
+int h264_hdr_decode(struct h264_hdr *hdr, struct mbuf *mb);
+
+/** Fragmentation Unit header */
+struct h264_fu {
+	unsigned s:1;      /**< Start bit                               */
+	unsigned e:1;      /**< End bit                                 */
+	unsigned r:1;      /**< The Reserved bit MUST be equal to 0     */
+	unsigned type:5;   /**< The NAL unit payload type               */
+};
+
+int h264_fu_hdr_encode(const struct h264_fu *fu, struct mbuf *mb);
+int h264_fu_hdr_decode(struct h264_fu *fu, struct mbuf *mb);
+
+const uint8_t *h264_find_startcode(const uint8_t *p, const uint8_t *end);
+
+int h264_packetize(const uint8_t *buf, size_t len, size_t pktsize,
+		   videnc_packet_h *pkth, void *arg);
+int h264_nal_send(bool first, bool last,
+		  bool marker, uint32_t ihdr, const uint8_t *buf,
+		  size_t size, size_t maxsz,
+		  videnc_packet_h *pkth, void *arg);
+
+/*
  * Modules
  */