/* GStreamer * Copyright (C) <2008> Wim Taymans * * 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., 59 Temple Place - Suite 330, * Boston, MA 02111-1307, USA. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include "gstrtpvrawdepay.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-rgb; video/x-raw-yuv") ); 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\", " "payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", " "clock-rate = (int) 90000, " "encoding-name = (string) \"RAW\"") ); GST_BOILERPLATE (GstRtpVRawDepay, gst_rtp_vraw_depay, GstBaseRTPDepayload, GST_TYPE_BASE_RTP_DEPAYLOAD); static gboolean gst_rtp_vraw_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps); static GstBuffer *gst_rtp_vraw_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf); static GstStateChangeReturn gst_rtp_vraw_depay_change_state (GstElement * element, GstStateChange transition); static gboolean gst_rtp_vraw_depay_handle_event (GstBaseRTPDepayload * filter, GstEvent * event); static void gst_rtp_vraw_depay_base_init (gpointer klass) { GstElementClass *element_class = GST_ELEMENT_CLASS (klass); gst_element_class_add_static_pad_template (element_class, &gst_rtp_vraw_depay_src_template); gst_element_class_add_static_pad_template (element_class, &gst_rtp_vraw_depay_sink_template); gst_element_class_set_details_simple (element_class, "RTP Raw Video depayloader", "Codec/Depayloader/Network/RTP", "Extracts raw video from RTP packets (RFC 4175)", "Wim Taymans "); } static void gst_rtp_vraw_depay_class_init (GstRtpVRawDepayClass * klass) { GstElementClass *gstelement_class; GstBaseRTPDepayloadClass *gstbasertpdepayload_class; gstelement_class = (GstElementClass *) klass; gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass; gstelement_class->change_state = gst_rtp_vraw_depay_change_state; gstbasertpdepayload_class->set_caps = gst_rtp_vraw_depay_setcaps; gstbasertpdepayload_class->process = gst_rtp_vraw_depay_process; gstbasertpdepayload_class->handle_event = gst_rtp_vraw_depay_handle_event; GST_DEBUG_CATEGORY_INIT (rtpvrawdepay_debug, "rtpvrawdepay", 0, "raw video RTP Depayloader"); } static void gst_rtp_vraw_depay_init (GstRtpVRawDepay * rtpvrawdepay, GstRtpVRawDepayClass * klass) { /* needed because of GST_BOILERPLATE */ } static void gst_rtp_vraw_depay_reset (GstRtpVRawDepay * rtpvrawdepay) { if (rtpvrawdepay->outbuf) { gst_buffer_unref (rtpvrawdepay->outbuf); rtpvrawdepay->outbuf = NULL; } rtpvrawdepay->timestamp = -1; } static gboolean gst_rtp_vraw_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps) { GstStructure *structure; GstRtpVRawDepay *rtpvrawdepay; gint clock_rate; const gchar *str, *type; gint format, width, height, pgroup, xinc, yinc; guint ystride, uvstride, yp, up, vp, outsize; GstCaps *srccaps; guint32 fourcc = 0; gboolean res; gint rmask = 0, gmask = 0, bmask = 0, amask = 0, bpp = 0, depth = 0; rtpvrawdepay = GST_RTP_VRAW_DEPAY (depayload); structure = gst_caps_get_structure (caps, 0); yp = up = vp = uvstride = 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); /* 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; ystride = GST_ROUND_UP_4 (width * 3); outsize = ystride * height; type = "video/x-raw-rgb"; rmask = 0x00ff0000; gmask = 0x0000ff00; bmask = 0x000000ff; depth = 24; bpp = 24; } else if (!strcmp (str, "RGBA")) { format = GST_VIDEO_FORMAT_RGBA; pgroup = 4; ystride = width * 4; outsize = ystride * height; type = "video/x-raw-rgb"; rmask = 0xff000000; gmask = 0x00ff0000; bmask = 0x0000ff00; amask = 0x000000ff; depth = 32; bpp = 32; } else if (!strcmp (str, "BGR")) { format = GST_VIDEO_FORMAT_BGR; pgroup = 3; ystride = GST_ROUND_UP_4 (width * 3); outsize = ystride * height; type = "video/x-raw-rgb"; rmask = 0x000000ff; gmask = 0x0000ff00; bmask = 0x00ff0000; depth = 24; bpp = 24; } else if (!strcmp (str, "BGRA")) { format = GST_VIDEO_FORMAT_BGRA; pgroup = 4; ystride = width * 4; outsize = ystride * height; type = "video/x-raw-rgb"; rmask = 0x0000ff00; gmask = 0x00ff0000; bmask = 0xff000000; amask = 0x000000ff; depth = 32; bpp = 32; } else if (!strcmp (str, "YCbCr-4:4:4")) { format = GST_VIDEO_FORMAT_AYUV; pgroup = 3; ystride = width * 4; outsize = ystride * height; type = "video/x-raw-yuv"; fourcc = GST_MAKE_FOURCC ('A', 'Y', 'U', 'V'); } else if (!strcmp (str, "YCbCr-4:2:2")) { format = GST_VIDEO_FORMAT_UYVY; pgroup = 4; ystride = GST_ROUND_UP_2 (width) * 2; outsize = ystride * height; type = "video/x-raw-yuv"; fourcc = GST_MAKE_FOURCC ('U', 'Y', 'V', 'Y'); xinc = 2; } else if (!strcmp (str, "YCbCr-4:2:0")) { format = GST_VIDEO_FORMAT_I420; pgroup = 6; ystride = GST_ROUND_UP_4 (width); uvstride = GST_ROUND_UP_8 (width) / 2; up = ystride * GST_ROUND_UP_2 (height); vp = up + uvstride * GST_ROUND_UP_2 (height) / 2; outsize = vp + uvstride * GST_ROUND_UP_2 (height) / 2; type = "video/x-raw-yuv"; fourcc = GST_MAKE_FOURCC ('I', '4', '2', '0'); xinc = yinc = 2; } else if (!strcmp (str, "YCbCr-4:1:1")) { format = GST_VIDEO_FORMAT_Y41B; pgroup = 6; ystride = GST_ROUND_UP_4 (width); uvstride = GST_ROUND_UP_8 (width) / 4; up = ystride * height; vp = up + uvstride * height; outsize = vp + uvstride * height; type = "video/x-raw-yuv"; fourcc = GST_MAKE_FOURCC ('Y', '4', '1', 'B'); xinc = 4; } else goto unknown_format; rtpvrawdepay->width = width; rtpvrawdepay->height = height; rtpvrawdepay->format = format; rtpvrawdepay->yp = yp; rtpvrawdepay->up = up; rtpvrawdepay->vp = vp; rtpvrawdepay->pgroup = pgroup; rtpvrawdepay->xinc = xinc; rtpvrawdepay->yinc = yinc; rtpvrawdepay->ystride = ystride; rtpvrawdepay->uvstride = uvstride; rtpvrawdepay->outsize = outsize; srccaps = gst_caps_new_simple (type, "width", G_TYPE_INT, width, "height", G_TYPE_INT, height, "format", GST_TYPE_FOURCC, fourcc, "framerate", GST_TYPE_FRACTION, 0, 1, NULL); if (!strcmp (type, "video/x-raw-rgb")) { gst_caps_set_simple (srccaps, "endianness", G_TYPE_INT, G_BIG_ENDIAN, "red_mask", G_TYPE_INT, rmask, "green_mask", G_TYPE_INT, gmask, "blue_mask", G_TYPE_INT, bmask, "bpp", G_TYPE_INT, bpp, "depth", G_TYPE_INT, depth, NULL); if (amask > 0) { gst_caps_set_simple (srccaps, "alpha_mask", G_TYPE_INT, amask, NULL); } } res = gst_pad_set_caps (GST_BASE_RTP_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, "yp %d, up %d, vp %d", yp, up, vp); GST_DEBUG_OBJECT (depayload, "xinc %d, yinc %d", xinc, yinc); GST_DEBUG_OBJECT (depayload, "pgroup %d, ystride %d, uvstride %d", pgroup, ystride, uvstride); GST_DEBUG_OBJECT (depayload, "outsize %u", outsize); 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; } 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; } } static GstBuffer * gst_rtp_vraw_depay_process (GstBaseRTPDepayload * depayload, GstBuffer * buf) { GstRtpVRawDepay *rtpvrawdepay; guint8 *payload, *data, *yp, *up, *vp, *headers; guint32 timestamp; guint cont, ystride, uvstride, pgroup, payload_len; gint width, height, xinc, yinc; rtpvrawdepay = GST_RTP_VRAW_DEPAY (depayload); timestamp = gst_rtp_buffer_get_timestamp (buf); if (timestamp != rtpvrawdepay->timestamp || rtpvrawdepay->outbuf == NULL) { GstBuffer *outbuf; 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_base_rtp_depayload_push_ts (depayload, rtpvrawdepay->timestamp, rtpvrawdepay->outbuf); rtpvrawdepay->outbuf = NULL; } ret = gst_pad_alloc_buffer (depayload->srcpad, -1, rtpvrawdepay->outsize, GST_PAD_CAPS (depayload->srcpad), &outbuf); if (ret != GST_FLOW_OK) goto alloc_failed; /* clear timestamp from alloc... */ GST_BUFFER_TIMESTAMP (outbuf) = -1; rtpvrawdepay->outbuf = outbuf; rtpvrawdepay->timestamp = timestamp; } data = GST_BUFFER_DATA (rtpvrawdepay->outbuf); /* get pointer and strides of the planes */ yp = data + rtpvrawdepay->yp; up = data + rtpvrawdepay->up; vp = data + rtpvrawdepay->vp; ystride = rtpvrawdepay->ystride; uvstride = rtpvrawdepay->uvstride; pgroup = rtpvrawdepay->pgroup; width = rtpvrawdepay->width; height = rtpvrawdepay->height; xinc = rtpvrawdepay->xinc; yinc = rtpvrawdepay->yinc; payload = gst_rtp_buffer_get_payload (buf); payload_len = gst_rtp_buffer_get_payload_len (buf); if (payload_len < 3) goto short_packet; /* skip extended seqnum */ payload += 2; payload_len -= 2; /* remember header position */ headers = payload; /* 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 maximim 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 (rtpvrawdepay->format) { 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: /* samples are packed just like gstreamer packs them */ offs /= xinc; datap = yp + (line * ystride) + (offs * pgroup); memcpy (datap, payload, plen); break; case GST_VIDEO_FORMAT_AYUV: { gint i; guint8 *p; datap = yp + (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; } if (gst_rtp_buffer_get_marker (buf)) { GST_LOG_OBJECT (depayload, "marker, flushing frame"); if (rtpvrawdepay->outbuf) { gst_base_rtp_depayload_push_ts (depayload, timestamp, rtpvrawdepay->outbuf); rtpvrawdepay->outbuf = NULL; } rtpvrawdepay->timestamp = -1; } return NULL; /* 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; } 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 (GstBaseRTPDepayload * 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); break; default: break; } ret = GST_BASE_RTP_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); 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); break; case GST_STATE_CHANGE_READY_TO_NULL: break; default: break; } return ret; } gboolean gst_rtp_vraw_depay_plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "rtpvrawdepay", GST_RANK_SECONDARY, GST_TYPE_RTP_VRAW_DEPAY); }