void ff_rtp_send_aac(AVFormatContext *s1, const uint8_t *buff, int size) { RTPMuxContext *s = s1->priv_data; int len, max_packet_size; uint8_t *p; /* skip ADTS header, if present */ if ((s1->streams[0]->codec->extradata_size) == 0) { size -= 7; buff += 7; } max_packet_size = s->max_payload_size - MAX_AU_HEADERS_SIZE; /* test if the packet must be sent */ len = (s->buf_ptr - s->buf); if ((s->num_frames == MAX_FRAMES_PER_PACKET) || (len && (len + size) > s->max_payload_size)) { int au_size = s->num_frames * 2; p = s->buf + MAX_AU_HEADERS_SIZE - au_size - 2; if (p != s->buf) { memmove(p + 2, s->buf + 2, au_size); } /* Write the AU header size */ p[0] = ((au_size * 8) & 0xFF) >> 8; p[1] = (au_size * 8) & 0xFF; ff_rtp_send_data(s1, p, s->buf_ptr - p, 1); s->num_frames = 0; } if (s->num_frames == 0) { s->buf_ptr = s->buf + MAX_AU_HEADERS_SIZE; s->timestamp = s->cur_timestamp; } if (size <= max_packet_size) { p = s->buf + s->num_frames++ * 2 + 2; *p++ = size >> 5; *p = (size & 0x1F) << 3; memcpy(s->buf_ptr, buff, size); s->buf_ptr += size; } else { if (s->buf_ptr != s->buf + MAX_AU_HEADERS_SIZE) { av_log(s1, AV_LOG_ERROR, "Strange...\n"); av_abort(); } max_packet_size = s->max_payload_size - 4; p = s->buf; p[0] = 0; p[1] = 16; while (size > 0) { len = FFMIN(size, max_packet_size); p[2] = len >> 5; p[3] = (size & 0x1F) << 3; memcpy(p + 4, buff, len); ff_rtp_send_data(s1, p, len + 4, len == size); size -= len; buff += len; } } }