/* GStreamer * Copyright (C) <2008> Wim Taymans <wim.taymans@gmail.com> * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Library General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Library General Public License for more details. * * You should have received a copy of the GNU Library General Public * License along with this library; if not, write to the * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, * Boston, MA 02110-1301, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include <gst/rtp/gstrtpbuffer.h> #include <gst/video/video.h> #include <string.h> #include <stdlib.h> #include "gstrtpelements.h" #include "gstrtpvrawdepay.h" #include "gstrtputils.h" GST_DEBUG_CATEGORY_STATIC (rtpvrawdepay_debug); #define GST_CAT_DEFAULT (rtpvrawdepay_debug) static GstStaticPadTemplate gst_rtp_vraw_depay_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw") ); static GstStaticPadTemplate gst_rtp_vraw_depay_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("application/x-rtp, " "media = (string) \"video\", " "clock-rate = (int) 90000, " "encoding-name = (string) \"RAW\", " "sampling = (string) { \"RGB\", \"RGBA\", \"BGR\", \"BGRA\", " "\"YCbCr-4:4:4\", \"YCbCr-4:2:2\", \"YCbCr-4:2:0\", " "\"YCbCr-4:1:1\" }," /* we cannot express these as strings * "width = (string) [1 32767]," * "height = (string) [1 32767]," */ "depth = (string) { \"8\", \"10\", \"12\", \"16\" }") ); #define gst_rtp_vraw_depay_parent_class parent_class G_DEFINE_TYPE (GstRtpVRawDepay, gst_rtp_vraw_depay, GST_TYPE_RTP_BASE_DEPAYLOAD); GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (rtpvrawdepay, "rtpvrawdepay", GST_RANK_SECONDARY, GST_TYPE_RTP_VRAW_DEPAY, rtp_element_init (plugin)); static gboolean gst_rtp_vraw_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps); static GstBuffer *gst_rtp_vraw_depay_process_packet (GstRTPBaseDepayload * depay, GstRTPBuffer * rtp); static GstStateChangeReturn gst_rtp_vraw_depay_change_state (GstElement * element, GstStateChange transition); static gboolean gst_rtp_vraw_depay_handle_event (GstRTPBaseDepayload * filter, GstEvent * event); static void gst_rtp_vraw_depay_class_init (GstRtpVRawDepayClass * klass) { GstElementClass *gstelement_class; GstRTPBaseDepayloadClass *gstrtpbasedepayload_class; gstelement_class = (GstElementClass *) klass; gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass; gstelement_class->change_state = gst_rtp_vraw_depay_change_state; gstrtpbasedepayload_class->set_caps = gst_rtp_vraw_depay_setcaps; gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_vraw_depay_process_packet; gstrtpbasedepayload_class->handle_event = gst_rtp_vraw_depay_handle_event; gst_element_class_add_static_pad_template (gstelement_class, &gst_rtp_vraw_depay_src_template); gst_element_class_add_static_pad_template (gstelement_class, &gst_rtp_vraw_depay_sink_template); gst_element_class_set_static_metadata (gstelement_class, "RTP Raw Video depayloader", "Codec/Depayloader/Network/RTP", "Extracts raw video from RTP packets (RFC 4175)", "Wim Taymans <wim.taymans@gmail.com>"); GST_DEBUG_CATEGORY_INIT (rtpvrawdepay_debug, "rtpvrawdepay", 0, "raw video RTP Depayloader"); } static void gst_rtp_vraw_depay_init (GstRtpVRawDepay * rtpvrawdepay) { } static void gst_rtp_vraw_depay_reset (GstRtpVRawDepay * rtpvrawdepay, gboolean full) { if (rtpvrawdepay->outbuf) { gst_video_frame_unmap (&rtpvrawdepay->frame); gst_buffer_unref (rtpvrawdepay->outbuf); rtpvrawdepay->outbuf = NULL; } rtpvrawdepay->timestamp = -1; if (full && rtpvrawdepay->pool) { gst_buffer_pool_set_active (rtpvrawdepay->pool, FALSE); gst_object_unref (rtpvrawdepay->pool); rtpvrawdepay->pool = NULL; } } static GstFlowReturn gst_rtp_vraw_depay_negotiate_pool (GstRtpVRawDepay * depay, GstCaps * caps, GstVideoInfo * info) { GstQuery *query; GstBufferPool *pool = NULL; guint size, min, max; GstStructure *config; /* find a pool for the negotiated caps now */ query = gst_query_new_allocation (caps, TRUE); if (!gst_pad_peer_query (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depay), query)) { /* not a problem, we use the defaults of query */ GST_DEBUG_OBJECT (depay, "could not get downstream ALLOCATION hints"); } if (gst_query_get_n_allocation_pools (query) > 0) { /* we got configuration from our peer, parse them */ gst_query_parse_nth_allocation_pool (query, 0, &pool, &size, &min, &max); } else { GST_DEBUG_OBJECT (depay, "didn't get downstream pool hints"); size = info->size; min = max = 0; } if (pool == NULL) { /* we did not get a pool, make one ourselves then */ pool = gst_video_buffer_pool_new (); } if (depay->pool) gst_object_unref (depay->pool); depay->pool = pool; config = gst_buffer_pool_get_config (pool); gst_buffer_pool_config_set_params (config, caps, size, min, max); if (gst_query_find_allocation_meta (query, GST_VIDEO_META_API_TYPE, NULL)) { /* just set the metadata, if the pool can support it we will transparently use * it through the video info API. We could also see if the pool support this * metadata and only activate it then. */ gst_buffer_pool_config_add_option (config, GST_BUFFER_POOL_OPTION_VIDEO_META); } gst_buffer_pool_set_config (pool, config); /* and activate */ gst_buffer_pool_set_active (pool, TRUE); gst_query_unref (query); return GST_FLOW_OK; } static gboolean gst_rtp_vraw_depay_setcaps (GstRTPBaseDepayload * depayload, GstCaps * caps) { GstStructure *structure; GstRtpVRawDepay *rtpvrawdepay; gint clock_rate; const gchar *str; gint format, width, height, depth, pgroup, xinc, yinc; GstCaps *srccaps; gboolean res; GstFlowReturn ret; rtpvrawdepay = GST_RTP_VRAW_DEPAY (depayload); structure = gst_caps_get_structure (caps, 0); xinc = yinc = 1; if (!gst_structure_get_int (structure, "clock-rate", &clock_rate)) clock_rate = 90000; /* default */ depayload->clock_rate = clock_rate; if (!(str = gst_structure_get_string (structure, "width"))) goto no_width; width = atoi (str); if (!(str = gst_structure_get_string (structure, "height"))) goto no_height; height = atoi (str); if (!(str = gst_structure_get_string (structure, "depth"))) goto no_depth; depth = atoi (str); /* optional interlace value but we don't handle interlaced * formats yet */ if (gst_structure_get_string (structure, "interlace")) goto interlaced; if (!(str = gst_structure_get_string (structure, "sampling"))) goto no_sampling; if (!strcmp (str, "RGB")) { format = GST_VIDEO_FORMAT_RGB; pgroup = 3; } else if (!strcmp (str, "RGBA")) { format = GST_VIDEO_FORMAT_RGBA; pgroup = 4; } else if (!strcmp (str, "BGR")) { format = GST_VIDEO_FORMAT_BGR; pgroup = 3; } else if (!strcmp (str, "BGRA")) { format = GST_VIDEO_FORMAT_BGRA; pgroup = 4; } else if (!strcmp (str, "YCbCr-4:4:4")) { format = GST_VIDEO_FORMAT_AYUV; pgroup = 3; } else if (!strcmp (str, "YCbCr-4:2:2")) { if (depth == 8) { format = GST_VIDEO_FORMAT_UYVY; pgroup = 4; } else if (depth == 10) { format = GST_VIDEO_FORMAT_UYVP; pgroup = 5; } else goto unknown_format; xinc = 2; } else if (!strcmp (str, "YCbCr-4:2:0")) { format = GST_VIDEO_FORMAT_I420; pgroup = 6; xinc = yinc = 2; } else if (!strcmp (str, "YCbCr-4:1:1")) { format = GST_VIDEO_FORMAT_Y41B; pgroup = 6; xinc = 4; } else { goto unknown_format; } gst_video_info_init (&rtpvrawdepay->vinfo); gst_video_info_set_format (&rtpvrawdepay->vinfo, format, width, height); GST_VIDEO_INFO_FPS_N (&rtpvrawdepay->vinfo) = 0; GST_VIDEO_INFO_FPS_D (&rtpvrawdepay->vinfo) = 1; rtpvrawdepay->pgroup = pgroup; rtpvrawdepay->xinc = xinc; rtpvrawdepay->yinc = yinc; srccaps = gst_video_info_to_caps (&rtpvrawdepay->vinfo); res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload), srccaps); gst_caps_unref (srccaps); GST_DEBUG_OBJECT (depayload, "width %d, height %d, format %d", width, height, format); GST_DEBUG_OBJECT (depayload, "xinc %d, yinc %d, pgroup %d", xinc, yinc, pgroup); /* negotiate a bufferpool */ if ((ret = gst_rtp_vraw_depay_negotiate_pool (rtpvrawdepay, srccaps, &rtpvrawdepay->vinfo)) != GST_FLOW_OK) goto no_bufferpool; return res; /* ERRORS */ no_width: { GST_ERROR_OBJECT (depayload, "no width specified"); return FALSE; } no_height: { GST_ERROR_OBJECT (depayload, "no height specified"); return FALSE; } no_depth: { GST_ERROR_OBJECT (depayload, "no depth specified"); return FALSE; } interlaced: { GST_ERROR_OBJECT (depayload, "interlaced formats not supported yet"); return FALSE; } no_sampling: { GST_ERROR_OBJECT (depayload, "no sampling specified"); return FALSE; } unknown_format: { GST_ERROR_OBJECT (depayload, "unknown sampling format '%s'", str); return FALSE; } no_bufferpool: { GST_DEBUG_OBJECT (depayload, "no bufferpool"); return FALSE; } } static GstBuffer * gst_rtp_vraw_depay_process_packet (GstRTPBaseDepayload * depayload, GstRTPBuffer * rtp) { GstRtpVRawDepay *rtpvrawdepay; guint8 *payload, *p0, *yp, *up, *vp, *headers; guint32 timestamp; guint cont, ystride, uvstride, pgroup, payload_len; gint width, height, xinc, yinc; GstVideoFrame *frame; gboolean marker; GstBuffer *outbuf = NULL; rtpvrawdepay = GST_RTP_VRAW_DEPAY (depayload); timestamp = gst_rtp_buffer_get_timestamp (rtp); if (timestamp != rtpvrawdepay->timestamp || rtpvrawdepay->outbuf == NULL) { GstBuffer *new_buffer; GstFlowReturn ret; GST_LOG_OBJECT (depayload, "new frame with timestamp %u", timestamp); /* new timestamp, flush old buffer and create new output buffer */ if (rtpvrawdepay->outbuf) { gst_video_frame_unmap (&rtpvrawdepay->frame); gst_rtp_base_depayload_push (depayload, rtpvrawdepay->outbuf); rtpvrawdepay->outbuf = NULL; } if (gst_pad_check_reconfigure (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload))) { GstCaps *caps; caps = gst_pad_get_current_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (depayload)); gst_rtp_vraw_depay_negotiate_pool (rtpvrawdepay, caps, &rtpvrawdepay->vinfo); gst_caps_unref (caps); } ret = gst_buffer_pool_acquire_buffer (rtpvrawdepay->pool, &new_buffer, NULL); if (G_UNLIKELY (ret != GST_FLOW_OK)) goto alloc_failed; /* clear timestamp from alloc... */ GST_BUFFER_PTS (new_buffer) = -1; if (!gst_video_frame_map (&rtpvrawdepay->frame, &rtpvrawdepay->vinfo, new_buffer, GST_MAP_WRITE | GST_VIDEO_FRAME_MAP_FLAG_NO_REF)) { gst_buffer_unref (new_buffer); goto invalid_frame; } rtpvrawdepay->outbuf = new_buffer; rtpvrawdepay->timestamp = timestamp; } frame = &rtpvrawdepay->frame; g_assert (frame->buffer != NULL); /* get pointer and strides of the planes */ p0 = GST_VIDEO_FRAME_PLANE_DATA (frame, 0); yp = GST_VIDEO_FRAME_COMP_DATA (frame, 0); up = GST_VIDEO_FRAME_COMP_DATA (frame, 1); vp = GST_VIDEO_FRAME_COMP_DATA (frame, 2); ystride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 0); uvstride = GST_VIDEO_FRAME_COMP_STRIDE (frame, 1); pgroup = rtpvrawdepay->pgroup; width = GST_VIDEO_INFO_WIDTH (&rtpvrawdepay->vinfo); height = GST_VIDEO_INFO_HEIGHT (&rtpvrawdepay->vinfo); xinc = rtpvrawdepay->xinc; yinc = rtpvrawdepay->yinc; payload = gst_rtp_buffer_get_payload (rtp); payload_len = gst_rtp_buffer_get_payload_len (rtp); if (payload_len < 3) goto short_packet; /* skip extended seqnum */ payload += 2; payload_len -= 2; /* remember header position */ headers = payload; gst_rtp_copy_video_meta (rtpvrawdepay, frame->buffer, rtp->buffer); /* find data start */ do { if (payload_len < 6) goto short_packet; cont = payload[4] & 0x80; payload += 6; payload_len -= 6; } while (cont); while (TRUE) { guint length, line, offs, plen; guint8 *datap; /* stop when we run out of data */ if (payload_len == 0) break; /* read length and cont. This should work because we iterated the headers * above. */ length = (headers[0] << 8) | headers[1]; line = ((headers[2] & 0x7f) << 8) | headers[3]; offs = ((headers[4] & 0x7f) << 8) | headers[5]; cont = headers[4] & 0x80; headers += 6; /* length must be a multiple of pgroup */ if (length % pgroup != 0) goto wrong_length; if (length > payload_len) length = payload_len; /* sanity check */ if (line > (height - yinc)) { GST_WARNING_OBJECT (depayload, "skipping line %d: out of range", line); goto next; } if (offs > (width - xinc)) { GST_WARNING_OBJECT (depayload, "skipping offset %d: out of range", offs); goto next; } /* calculate the maximum amount of bytes we can use per line */ if (offs + ((length / pgroup) * xinc) > width) { plen = ((width - offs) * pgroup) / xinc; GST_WARNING_OBJECT (depayload, "clipping length %d, offset %d, plen %d", length, offs, plen); } else plen = length; GST_LOG_OBJECT (depayload, "writing length %u/%u, line %u, offset %u, remaining %u", plen, length, line, offs, payload_len); switch (GST_VIDEO_INFO_FORMAT (&rtpvrawdepay->vinfo)) { case GST_VIDEO_FORMAT_RGB: case GST_VIDEO_FORMAT_RGBA: case GST_VIDEO_FORMAT_BGR: case GST_VIDEO_FORMAT_BGRA: case GST_VIDEO_FORMAT_UYVY: case GST_VIDEO_FORMAT_UYVP: /* samples are packed just like gstreamer packs them */ offs /= xinc; datap = p0 + (line * ystride) + (offs * pgroup); memcpy (datap, payload, plen); break; case GST_VIDEO_FORMAT_AYUV: { gint i; guint8 *p; datap = p0 + (line * ystride) + (offs * 4); p = payload; /* samples are packed in order Cb-Y-Cr for both interlaced and * progressive frames */ for (i = 0; i < plen; i += pgroup) { *datap++ = 0; *datap++ = p[1]; *datap++ = p[0]; *datap++ = p[2]; p += pgroup; } break; } case GST_VIDEO_FORMAT_I420: { gint i; guint uvoff; guint8 *yd1p, *yd2p, *udp, *vdp, *p; yd1p = yp + (line * ystride) + (offs); yd2p = yd1p + ystride; uvoff = (line / yinc * uvstride) + (offs / xinc); udp = up + uvoff; vdp = vp + uvoff; p = payload; /* line 0/1: Y00-Y01-Y10-Y11-Cb00-Cr00 Y02-Y03-Y12-Y13-Cb01-Cr01 ... */ for (i = 0; i < plen; i += pgroup) { *yd1p++ = p[0]; *yd1p++ = p[1]; *yd2p++ = p[2]; *yd2p++ = p[3]; *udp++ = p[4]; *vdp++ = p[5]; p += pgroup; } break; } case GST_VIDEO_FORMAT_Y41B: { gint i; guint uvoff; guint8 *ydp, *udp, *vdp, *p; ydp = yp + (line * ystride) + (offs); uvoff = (line / yinc * uvstride) + (offs / xinc); udp = up + uvoff; vdp = vp + uvoff; p = payload; /* Samples are packed in order Cb0-Y0-Y1-Cr0-Y2-Y3 for both interlaced * and progressive scan lines */ for (i = 0; i < plen; i += pgroup) { *udp++ = p[0]; *ydp++ = p[1]; *ydp++ = p[2]; *vdp++ = p[3]; *ydp++ = p[4]; *ydp++ = p[5]; p += pgroup; } break; } default: goto unknown_sampling; } next: if (!cont) break; payload += length; payload_len -= length; } marker = gst_rtp_buffer_get_marker (rtp); if (marker) { GST_LOG_OBJECT (depayload, "marker, flushing frame"); gst_video_frame_unmap (&rtpvrawdepay->frame); outbuf = rtpvrawdepay->outbuf; rtpvrawdepay->outbuf = NULL; rtpvrawdepay->timestamp = -1; } return outbuf; /* ERRORS */ unknown_sampling: { GST_ELEMENT_ERROR (depayload, STREAM, FORMAT, (NULL), ("unimplemented sampling")); return NULL; } alloc_failed: { GST_WARNING_OBJECT (depayload, "failed to alloc output buffer"); return NULL; } invalid_frame: { GST_ERROR_OBJECT (depayload, "could not map video frame"); return NULL; } wrong_length: { GST_WARNING_OBJECT (depayload, "length not multiple of pgroup"); return NULL; } short_packet: { GST_WARNING_OBJECT (depayload, "short packet"); return NULL; } } static gboolean gst_rtp_vraw_depay_handle_event (GstRTPBaseDepayload * filter, GstEvent * event) { gboolean ret; GstRtpVRawDepay *rtpvrawdepay; rtpvrawdepay = GST_RTP_VRAW_DEPAY (filter); switch (GST_EVENT_TYPE (event)) { case GST_EVENT_FLUSH_STOP: gst_rtp_vraw_depay_reset (rtpvrawdepay, FALSE); break; default: break; } ret = GST_RTP_BASE_DEPAYLOAD_CLASS (parent_class)->handle_event (filter, event); return ret; } static GstStateChangeReturn gst_rtp_vraw_depay_change_state (GstElement * element, GstStateChange transition) { GstRtpVRawDepay *rtpvrawdepay; GstStateChangeReturn ret; rtpvrawdepay = GST_RTP_VRAW_DEPAY (element); switch (transition) { case GST_STATE_CHANGE_NULL_TO_READY: break; case GST_STATE_CHANGE_READY_TO_PAUSED: gst_rtp_vraw_depay_reset (rtpvrawdepay, TRUE); break; default: break; } ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition); switch (transition) { case GST_STATE_CHANGE_PAUSED_TO_READY: gst_rtp_vraw_depay_reset (rtpvrawdepay, TRUE); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; }