static gboolean gst_rtp_j2k_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps) { GstRtpJ2KDepay *rtpj2kdepay; GstStructure *structure; gint clock_rate; GstCaps *outcaps; gboolean res; rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload); structure = gst_caps_get_structure (caps, 0); if (!gst_structure_get_int (structure, "clock-rate", &clock_rate)) clock_rate = 90000; depayload->clock_rate = clock_rate; outcaps = gst_caps_new_simple ("image/x-jpc", "framerate", GST_TYPE_FRACTION, 0, 1, "fields", G_TYPE_INT, 1, "fourcc", GST_TYPE_FOURCC, GST_MAKE_FOURCC ('s', 'Y', 'U', 'V'), NULL); res = gst_pad_set_caps (depayload->srcpad, outcaps); gst_caps_unref (outcaps); return res; }
static GstStateChangeReturn gst_rtp_j2k_depay_change_state (GstElement * element, GstStateChange transition) { GstRtpJ2KDepay *rtpj2kdepay; GstStateChangeReturn ret; rtpj2kdepay = GST_RTP_J2K_DEPAY (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: gst_rtp_j2k_depay_reset (rtpj2kdepay); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_rtp_j2k_depay_reset (rtpj2kdepay); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; }
static void gst_rtp_j2k_depay_finalize (GObject * object) { GstRtpJ2KDepay *rtpj2kdepay; rtpj2kdepay = GST_RTP_J2K_DEPAY (object); g_object_unref (rtpj2kdepay->adapter); rtpj2kdepay->adapter = NULL; G_OBJECT_CLASS (parent_class)->finalize (object); }
static void gst_rtp_j2k_depay_finalize (GObject * object) { GstRtpJ2KDepay *rtpj2kdepay; rtpj2kdepay = GST_RTP_J2K_DEPAY (object); clear_mheaders (rtpj2kdepay); g_object_unref (rtpj2kdepay->pu_adapter); g_object_unref (rtpj2kdepay->t_adapter); g_object_unref (rtpj2kdepay->f_adapter); G_OBJECT_CLASS (parent_class)->finalize (object); }
static GstFlowReturn gst_rtp_j2k_depay_flush_pu (GstRTPBaseDepayload * depayload) { GstRtpJ2KDepay *rtpj2kdepay; GstBuffer *mheader; guint avail, MHF, mh_id; rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload); /* take all available buffers */ avail = gst_adapter_available (rtpj2kdepay->pu_adapter); if (avail == 0) goto done; MHF = rtpj2kdepay->pu_MHF; mh_id = rtpj2kdepay->last_mh_id; GST_DEBUG_OBJECT (rtpj2kdepay, "flushing PU of size %u", avail); if (MHF == 0) { GList *packets, *walk; packets = gst_adapter_take_list (rtpj2kdepay->pu_adapter, avail); /* append packets */ for (walk = packets; walk; walk = g_list_next (walk)) { GstBuffer *buf = GST_BUFFER_CAST (walk->data); GST_DEBUG_OBJECT (rtpj2kdepay, "append pu packet of size %" G_GSIZE_FORMAT, gst_buffer_get_size (buf)); gst_adapter_push (rtpj2kdepay->t_adapter, buf); } g_list_free (packets); } else { /* we have a header */ GST_DEBUG_OBJECT (rtpj2kdepay, "keeping header %u", mh_id); /* we managed to see the start and end of the header, take all from * adapter and keep in header */ mheader = gst_adapter_take_buffer (rtpj2kdepay->pu_adapter, avail); store_mheader (rtpj2kdepay, mh_id, mheader); } done: rtpj2kdepay->have_sync = FALSE; return GST_FLOW_OK; }
static void gst_rtp_j2k_depay_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstRtpJ2KDepay *rtpj2kdepay; rtpj2kdepay = GST_RTP_J2K_DEPAY (object); switch (prop_id) { case PROP_BUFFER_LIST: g_value_set_boolean (value, rtpj2kdepay->buffer_list); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }
static GstBuffer * gst_rtp_j2k_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf) { GstRtpJ2KDepay *rtpj2kdepay; guint8 *payload; guint MHF, mh_id, frag_offset, tile, payload_len, j2klen; gint gap; guint32 rtptime; rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload); payload = gst_rtp_buffer_get_payload (buf); payload_len = gst_rtp_buffer_get_payload_len (buf); /* we need at least a header */ if (payload_len < 8) goto empty_packet; rtptime = gst_rtp_buffer_get_timestamp (buf); /* new timestamp marks new frame */ if (rtpj2kdepay->last_rtptime != rtptime) { rtpj2kdepay->last_rtptime = rtptime; /* flush pending frame */ gst_rtp_j2k_depay_flush_frame (depayload); } /* * 0 1 2 3 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |tp |MHF|mh_id|T| priority | tile number | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |reserved | fragment offset | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ MHF = (payload[0] & 0x30) >> 4; mh_id = (payload[0] & 0xe) >> 1; if (rtpj2kdepay->last_mh_id == -1) rtpj2kdepay->last_mh_id = mh_id; else if (rtpj2kdepay->last_mh_id != mh_id) goto wrong_mh_id; tile = (payload[2] << 8) | payload[3]; frag_offset = (payload[5] << 16) | (payload[6] << 8) | payload[7]; j2klen = payload_len - 8; GST_DEBUG_OBJECT (rtpj2kdepay, "MHF %u, tile %u, frag %u, expected %u", MHF, tile, frag_offset, rtpj2kdepay->next_frag); /* calculate the gap between expected frag */ gap = frag_offset - rtpj2kdepay->next_frag; /* calculate next frag */ rtpj2kdepay->next_frag = frag_offset + j2klen; if (gap != 0) { GST_DEBUG_OBJECT (rtpj2kdepay, "discont of %d, clear PU", gap); /* discont, clear pu adapter and resync */ gst_rtp_j2k_depay_clear_pu (rtpj2kdepay); } /* check for sync code */ if (j2klen > 2 && payload[8] == 0xff) { guint marker = payload[9]; /* packets must start with SOC, SOT or SOP */ switch (marker) { case J2K_MARKER_SOC: GST_DEBUG_OBJECT (rtpj2kdepay, "found SOC packet"); /* flush the previous frame, should have happened when the timestamp * changed above. */ gst_rtp_j2k_depay_flush_frame (depayload); rtpj2kdepay->have_sync = TRUE; break; case J2K_MARKER_SOT: /* flush the previous tile */ gst_rtp_j2k_depay_flush_tile (depayload); GST_DEBUG_OBJECT (rtpj2kdepay, "found SOT packet"); rtpj2kdepay->have_sync = TRUE; /* we sync on the tile now */ rtpj2kdepay->last_tile = tile; break; case J2K_MARKER_SOP: GST_DEBUG_OBJECT (rtpj2kdepay, "found SOP packet"); /* flush the previous PU */ gst_rtp_j2k_depay_flush_pu (depayload); if (rtpj2kdepay->last_tile != tile) { /* wrong tile, we lose sync and we need a new SOT or SOC to regain * sync. First flush out the previous tile if we have one. */ if (rtpj2kdepay->last_tile != -1) gst_rtp_j2k_depay_flush_tile (depayload); /* now we have no more valid tile and no sync */ rtpj2kdepay->last_tile = -1; rtpj2kdepay->have_sync = FALSE; } else { rtpj2kdepay->have_sync = TRUE; } break; default: GST_DEBUG_OBJECT (rtpj2kdepay, "no sync packet 0x%02d", marker); break; } } if (rtpj2kdepay->have_sync) { GstBuffer *pu_frag; if (gst_adapter_available (rtpj2kdepay->pu_adapter) == 0) { /* first part of pu, record state */ GST_DEBUG_OBJECT (rtpj2kdepay, "first PU"); rtpj2kdepay->pu_MHF = MHF; } /* and push in pu adapter */ GST_DEBUG_OBJECT (rtpj2kdepay, "push pu of size %u in adapter", j2klen); pu_frag = gst_rtp_buffer_get_payload_subbuffer (buf, 8, -1); gst_adapter_push (rtpj2kdepay->pu_adapter, pu_frag); if (MHF & 2) { /* last part of main header received, we can flush it */ GST_DEBUG_OBJECT (rtpj2kdepay, "header end, flush pu"); gst_rtp_j2k_depay_flush_pu (depayload); } } else { GST_DEBUG_OBJECT (rtpj2kdepay, "discard packet, no sync"); } /* marker bit finishes the frame */ if (gst_rtp_buffer_get_marker (buf)) { GST_DEBUG_OBJECT (rtpj2kdepay, "marker set, last buffer"); /* then flush frame */ gst_rtp_j2k_depay_flush_frame (depayload); } return NULL; /* ERRORS */ empty_packet: { GST_ELEMENT_WARNING (rtpj2kdepay, STREAM, DECODE, ("Empty Payload."), (NULL)); return NULL; } wrong_mh_id: { GST_ELEMENT_WARNING (rtpj2kdepay, STREAM, DECODE, ("Invalid mh_id %u, expected %u", mh_id, rtpj2kdepay->last_mh_id), (NULL)); gst_rtp_j2k_depay_clear_pu (rtpj2kdepay); return NULL; } }
static GstFlowReturn gst_rtp_j2k_depay_flush_frame (GstBaseRTPDepayload * depayload) { GstRtpJ2KDepay *rtpj2kdepay; guint8 end[2]; guint8 *data; guint avail; GstFlowReturn ret = GST_FLOW_OK; rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload); /* flush pending tile */ gst_rtp_j2k_depay_flush_tile (depayload); /* last buffer take all data out of the adapter */ avail = gst_adapter_available (rtpj2kdepay->f_adapter); if (avail == 0) goto done; if (avail > 2) { GstBuffer *outbuf; /* take the last bytes of the JPEG 2000 data to see if there is an EOC * marker */ gst_adapter_copy (rtpj2kdepay->f_adapter, end, avail - 2, 2); if (end[0] != 0xff && end[1] != 0xd9) { GST_DEBUG_OBJECT (rtpj2kdepay, "no EOC marker, adding one"); /* no EOI marker, add one */ outbuf = gst_buffer_new_and_alloc (2); data = GST_BUFFER_DATA (outbuf); data[0] = 0xff; data[1] = 0xd9; gst_adapter_push (rtpj2kdepay->f_adapter, outbuf); avail += 2; } if (rtpj2kdepay->buffer_list) { GList *list; GstBufferList *buflist; GstBufferListIterator *it; GST_DEBUG_OBJECT (rtpj2kdepay, "pushing buffer list of %u bytes", avail); list = gst_adapter_take_list (rtpj2kdepay->f_adapter, avail); buflist = gst_buffer_list_new (); it = gst_buffer_list_iterate (buflist); gst_buffer_list_iterator_add_group (it); gst_buffer_list_iterator_add_list (it, list); gst_buffer_list_iterator_free (it); ret = gst_base_rtp_depayload_push_list (depayload, buflist); } else { GST_DEBUG_OBJECT (rtpj2kdepay, "pushing buffer of %u bytes", avail); outbuf = gst_adapter_take_buffer (rtpj2kdepay->f_adapter, avail); ret = gst_base_rtp_depayload_push (depayload, outbuf); } } else { GST_WARNING_OBJECT (rtpj2kdepay, "empty packet"); gst_adapter_clear (rtpj2kdepay->f_adapter); } /* we accept any mh_id now */ rtpj2kdepay->last_mh_id = -1; /* reset state */ rtpj2kdepay->next_frag = 0; rtpj2kdepay->have_sync = FALSE; done: /* we can't keep headers with mh_id of 0 */ store_mheader (rtpj2kdepay, 0, NULL); return ret; }
static GstFlowReturn gst_rtp_j2k_depay_flush_tile (GstBaseRTPDepayload * depayload) { GstRtpJ2KDepay *rtpj2kdepay; guint avail, mh_id; GList *packets, *walk; guint8 end[2]; GstFlowReturn ret = GST_FLOW_OK; rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload); /* flush pending PU */ gst_rtp_j2k_depay_flush_pu (depayload); /* take all available buffers */ avail = gst_adapter_available (rtpj2kdepay->t_adapter); if (avail == 0) goto done; mh_id = rtpj2kdepay->last_mh_id; GST_DEBUG_OBJECT (rtpj2kdepay, "flushing tile of size %u", avail); if (gst_adapter_available (rtpj2kdepay->f_adapter) == 0) { GstBuffer *mheader; /* we need a header now */ if ((mheader = rtpj2kdepay->MH[mh_id]) == NULL) goto waiting_header; /* push header in the adapter */ GST_DEBUG_OBJECT (rtpj2kdepay, "pushing header %u", mh_id); gst_adapter_push (rtpj2kdepay->f_adapter, gst_buffer_ref (mheader)); } /* check for last bytes */ gst_adapter_copy (rtpj2kdepay->t_adapter, end, avail - 2, 2); /* now append the tile packets to the frame */ packets = gst_adapter_take_list (rtpj2kdepay->t_adapter, avail); for (walk = packets; walk; walk = g_list_next (walk)) { GstBuffer *buf = GST_BUFFER_CAST (walk->data); if (walk == packets) { guint8 *data; guint size; /* first buffer should contain the SOT */ data = GST_BUFFER_DATA (buf); size = GST_BUFFER_SIZE (buf); if (size < 12) goto invalid_tile; if (data[0] == 0xff && data[1] == J2K_MARKER_SOT) { guint Psot, nPsot; if (end[0] == 0xff && end[1] == J2K_MARKER_EOC) nPsot = avail - 2; else nPsot = avail; Psot = GST_READ_UINT32_BE (&data[6]); if (Psot != nPsot && Psot != 0) { /* Psot must match the size of the tile */ GST_DEBUG_OBJECT (rtpj2kdepay, "set Psot from %u to %u", Psot, nPsot); buf = gst_buffer_make_writable (buf); data = GST_BUFFER_DATA (buf); GST_WRITE_UINT32_BE (&data[6], nPsot); } } } GST_DEBUG_OBJECT (rtpj2kdepay, "append pu packet of size %u", GST_BUFFER_SIZE (buf)); gst_adapter_push (rtpj2kdepay->f_adapter, buf); } g_list_free (packets); done: rtpj2kdepay->last_tile = -1; return ret; /* errors */ waiting_header: { GST_DEBUG_OBJECT (rtpj2kdepay, "waiting for header %u", mh_id); gst_adapter_clear (rtpj2kdepay->t_adapter); rtpj2kdepay->last_tile = -1; return ret; } invalid_tile: { GST_ELEMENT_WARNING (rtpj2kdepay, STREAM, DECODE, ("Invalid tile"), (NULL)); gst_adapter_clear (rtpj2kdepay->t_adapter); rtpj2kdepay->last_tile = -1; return ret; } }
static GstBuffer * gst_rtp_j2k_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf) { GstRtpJ2KDepay *rtpj2kdepay; GstBuffer *outbuf; guint8 *payload; guint frag_offset; rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload); /* flush everything on discont for now */ if (GST_BUFFER_IS_DISCONT (buf)) { GST_DEBUG_OBJECT (rtpj2kdepay, "DISCONT, flushing data"); gst_adapter_clear (rtpj2kdepay->adapter); rtpj2kdepay->need_header = TRUE; } if (gst_rtp_buffer_get_payload_len (buf) < 8) goto empty_packet; payload = gst_rtp_buffer_get_payload (buf); /* * 0 1 2 3 * 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |tp |MHF|mh_id|T| priority | tile number | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |reserved | fragment offset | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ */ frag_offset = (payload[5] << 16) | (payload[6] << 8) | payload[7]; GST_DEBUG_OBJECT (rtpj2kdepay, "frag %u", frag_offset); if (rtpj2kdepay->need_header) { if (frag_offset != 0) goto waiting_header; rtpj2kdepay->need_header = FALSE; } /* take JPEG 2000 data, push in the adapter */ outbuf = gst_rtp_buffer_get_payload_subbuffer (buf, 8, -1); gst_adapter_push (rtpj2kdepay->adapter, outbuf); outbuf = NULL; if (gst_rtp_buffer_get_marker (buf)) { guint avail; guint8 end[2]; guint8 *data; /* last buffer take all data out of the adapter */ avail = gst_adapter_available (rtpj2kdepay->adapter); GST_DEBUG_OBJECT (rtpj2kdepay, "marker set, last buffer"); /* take the last bytes of the JPEG 2000 data to see if there is an EOC * marker */ gst_adapter_copy (rtpj2kdepay->adapter, end, avail - 2, 2); if (end[0] != 0xff && end[1] != 0xd9) { GST_DEBUG_OBJECT (rtpj2kdepay, "no EOC marker, adding one"); /* no EOI marker, add one */ outbuf = gst_buffer_new_and_alloc (2); data = GST_BUFFER_DATA (outbuf); data[0] = 0xff; data[1] = 0xd9; gst_adapter_push (rtpj2kdepay->adapter, outbuf); avail += 2; } outbuf = gst_adapter_take_buffer (rtpj2kdepay->adapter, avail); GST_DEBUG_OBJECT (rtpj2kdepay, "returning %u bytes", avail); } return outbuf; /* ERRORS */ empty_packet: { GST_ELEMENT_WARNING (rtpj2kdepay, STREAM, DECODE, ("Empty Payload."), (NULL)); return NULL; } waiting_header: { GST_DEBUG_OBJECT (rtpj2kdepay, "we are waiting for a header"); return NULL; } }
static GstFlowReturn gst_rtp_j2k_depay_flush_frame (GstRTPBaseDepayload * depayload) { GstRtpJ2KDepay *rtpj2kdepay; guint8 end[2]; guint avail; GstFlowReturn ret = GST_FLOW_OK; rtpj2kdepay = GST_RTP_J2K_DEPAY (depayload); /* flush pending tile */ gst_rtp_j2k_depay_flush_tile (depayload); /* last buffer take all data out of the adapter */ avail = gst_adapter_available (rtpj2kdepay->f_adapter); if (avail == 0) goto done; if (avail > 2) { GstBuffer *outbuf; /* take the last bytes of the JPEG 2000 data to see if there is an EOC * marker */ gst_adapter_copy (rtpj2kdepay->f_adapter, end, avail - 2, 2); if (end[0] != 0xff && end[1] != 0xd9) { end[0] = 0xff; end[1] = 0xd9; GST_DEBUG_OBJECT (rtpj2kdepay, "no EOC marker, adding one"); /* no EOI marker, add one */ outbuf = gst_buffer_new_and_alloc (2); gst_buffer_fill (outbuf, 0, end, 2); gst_adapter_push (rtpj2kdepay->f_adapter, outbuf); avail += 2; } GST_DEBUG_OBJECT (rtpj2kdepay, "pushing buffer of %u bytes", avail); outbuf = gst_adapter_take_buffer (rtpj2kdepay->f_adapter, avail); gst_rtp_drop_meta (GST_ELEMENT_CAST (depayload), outbuf, g_quark_from_static_string (GST_META_TAG_VIDEO_STR)); ret = gst_rtp_base_depayload_push (depayload, outbuf); } else { GST_WARNING_OBJECT (rtpj2kdepay, "empty packet"); gst_adapter_clear (rtpj2kdepay->f_adapter); } /* we accept any mh_id now */ rtpj2kdepay->last_mh_id = -1; /* reset state */ rtpj2kdepay->next_frag = 0; rtpj2kdepay->have_sync = FALSE; done: /* we can't keep headers with mh_id of 0 */ store_mheader (rtpj2kdepay, 0, NULL); return ret; }