/* 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 "gstrtpvrawpay.h" GST_DEBUG_CATEGORY_STATIC (rtpvrawpay_debug); #define GST_CAT_DEFAULT (rtpvrawpay_debug) static GstStaticPadTemplate gst_rtp_vraw_pay_sink_template = GST_STATIC_PAD_TEMPLATE ("sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_STATIC_CAPS ("video/x-raw, " "format = (string) { RGB, RGBA, BGR, BGRA, AYUYV, UYVY, I420, Y41B, UYVP, I420, Y42B, Y444 }, " "width = (int) [ 1, 32767 ], " "height = (int) [ 1, 32767 ]; ") ); static GstStaticPadTemplate gst_rtp_vraw_pay_src_template = GST_STATIC_PAD_TEMPLATE ("src", GST_PAD_SRC, 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\"," "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\" }," "colorimetry = (string) { \"BT601-5\", \"BT709-2\", \"SMPTE240M\" }" /* optional * interlace = * top-field-first = * chroma-position = (string) * gamma = (float) */ ) ); static gboolean gst_rtp_vraw_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps); static GstFlowReturn gst_rtp_vraw_pay_handle_buffer (GstRTPBasePayload * payload, GstBuffer * buffer); G_DEFINE_TYPE (GstRtpVRawPay, gst_rtp_vraw_pay, GST_TYPE_RTP_BASE_PAYLOAD) static void gst_rtp_vraw_pay_class_init (GstRtpVRawPayClass * klass) { GstRTPBasePayloadClass *gstrtpbasepayload_class; GstElementClass *gstelement_class; gstelement_class = (GstElementClass *) klass; gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass; gstrtpbasepayload_class->set_caps = gst_rtp_vraw_pay_setcaps; gstrtpbasepayload_class->handle_buffer = gst_rtp_vraw_pay_handle_buffer; gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&gst_rtp_vraw_pay_src_template)); gst_element_class_add_pad_template (gstelement_class, gst_static_pad_template_get (&gst_rtp_vraw_pay_sink_template)); gst_element_class_set_details_simple (gstelement_class, "RTP Raw Video payloader", "Codec/Payloader/Network/RTP", "Payload raw video as RTP packets (RFC 4175)", "Wim Taymans "); GST_DEBUG_CATEGORY_INIT (rtpvrawpay_debug, "rtpvrawpay", 0, "Raw video RTP Payloader"); } static void gst_rtp_vraw_pay_init (GstRtpVRawPay * rtpvrawpay) { } static gboolean gst_rtp_vraw_pay_setcaps (GstRTPBasePayload * payload, GstCaps * caps) { GstRtpVRawPay *rtpvrawpay; gboolean res; gint pgroup, xinc, yinc; const gchar *depthstr, *samplingstr, *colorimetrystr; gchar *wstr, *hstr; gint depth; GstVideoInfo info; rtpvrawpay = GST_RTP_VRAW_PAY (payload); if (!gst_video_info_from_caps (&info, caps)) goto invalid_caps; rtpvrawpay->vinfo = info; if (gst_video_colorimetry_matches (&info.colorimetry, GST_VIDEO_COLORIMETRY_BT601)) { colorimetrystr = "BT601-5"; } else if (gst_video_colorimetry_matches (&info.colorimetry, GST_VIDEO_COLORIMETRY_BT709)) { colorimetrystr = "BT709-2"; } else if (gst_video_colorimetry_matches (&info.colorimetry, GST_VIDEO_COLORIMETRY_SMPTE240M)) { colorimetrystr = "SMPTE240M"; } else { colorimetrystr = "SMPTE240M"; } xinc = yinc = 1; /* these values are the only thing we can do */ depthstr = "8"; depth = 8; switch (GST_VIDEO_INFO_FORMAT (&info)) { case GST_VIDEO_FORMAT_RGBA: samplingstr = "RGBA"; pgroup = 4; break; case GST_VIDEO_FORMAT_BGRA: samplingstr = "BGRA"; pgroup = 4; break; case GST_VIDEO_FORMAT_RGB: samplingstr = "RGB"; pgroup = 3; case GST_VIDEO_FORMAT_BGR: samplingstr = "BGR"; pgroup = 3; break; case GST_VIDEO_FORMAT_AYUV: samplingstr = "YCbCr-4:4:4"; pgroup = 3; break; case GST_VIDEO_FORMAT_UYVY: samplingstr = "YCbCr-4:2:2"; pgroup = 4; xinc = 2; break; case GST_VIDEO_FORMAT_Y41B: samplingstr = "YCbCr-4:1:1"; pgroup = 6; xinc = 4; break; case GST_VIDEO_FORMAT_I420: samplingstr = "YCbCr-4:2:0"; pgroup = 6; xinc = yinc = 2; break; case GST_VIDEO_FORMAT_UYVP: samplingstr = "YCbCr-4:2:2"; pgroup = 4; xinc = 2; depth = 10; depthstr = "10"; break; default: goto unknown_format; break; } if (info.flags & GST_VIDEO_FLAG_INTERLACED) { yinc *= 2; } rtpvrawpay->pgroup = pgroup; rtpvrawpay->xinc = xinc; rtpvrawpay->yinc = yinc; rtpvrawpay->depth = depth; GST_DEBUG_OBJECT (payload, "width %d, height %d, sampling %s", GST_VIDEO_INFO_WIDTH (&info), GST_VIDEO_INFO_HEIGHT (&info), samplingstr); GST_DEBUG_OBJECT (payload, "xinc %d, yinc %d, pgroup %d", xinc, yinc, pgroup); wstr = g_strdup_printf ("%d", GST_VIDEO_INFO_WIDTH (&info)); hstr = g_strdup_printf ("%d", GST_VIDEO_INFO_HEIGHT (&info)); gst_rtp_base_payload_set_options (payload, "video", TRUE, "RAW", 90000); if (info.flags & GST_VIDEO_FLAG_INTERLACED) { res = gst_rtp_base_payload_set_outcaps (payload, "sampling", G_TYPE_STRING, samplingstr, "depth", G_TYPE_STRING, depthstr, "width", G_TYPE_STRING, wstr, "height", G_TYPE_STRING, hstr, "colorimetry", G_TYPE_STRING, colorimetrystr, "interlace", G_TYPE_STRING, "true", NULL); } else { res = gst_rtp_base_payload_set_outcaps (payload, "sampling", G_TYPE_STRING, samplingstr, "depth", G_TYPE_STRING, depthstr, "width", G_TYPE_STRING, wstr, "height", G_TYPE_STRING, hstr, "colorimetry", G_TYPE_STRING, colorimetrystr, NULL); } g_free (wstr); g_free (hstr); return res; /* ERRORS */ invalid_caps: { GST_ERROR_OBJECT (payload, "could not parse caps"); return FALSE; } unknown_format: { GST_ERROR_OBJECT (payload, "unknown caps format"); return FALSE; } } static GstFlowReturn gst_rtp_vraw_pay_handle_buffer (GstRTPBasePayload * payload, GstBuffer * buffer) { GstRtpVRawPay *rtpvrawpay; GstFlowReturn ret = GST_FLOW_OK; guint line, offset; guint8 *yp, *up, *vp; guint ystride, uvstride; guint pgroup; guint mtu; guint width, height; gint field; GstVideoFrame frame; gint interlaced; GstRTPBuffer rtp; rtpvrawpay = GST_RTP_VRAW_PAY (payload); gst_video_frame_map (&frame, &rtpvrawpay->vinfo, buffer, GST_MAP_READ); GST_LOG_OBJECT (rtpvrawpay, "new frame of %" G_GSIZE_FORMAT " bytes", gst_buffer_get_size (buffer)); /* get pointer and strides of the planes */ 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); mtu = GST_RTP_BASE_PAYLOAD_MTU (payload); /* amount of bytes for one pixel */ pgroup = rtpvrawpay->pgroup; width = GST_VIDEO_INFO_WIDTH (&rtpvrawpay->vinfo); height = GST_VIDEO_INFO_HEIGHT (&rtpvrawpay->vinfo); interlaced = !!(rtpvrawpay->vinfo.flags & GST_VIDEO_FLAG_INTERLACED); /* start with line 0, offset 0 */ for (field = 0; field < 1 + interlaced; field++) { line = field; offset = 0; /* write all lines */ while (line < height) { guint left; GstBuffer *out; guint8 *outdata, *headers; gboolean next_line; guint length, cont, pixels; /* get the max allowed payload length size, we try to fill the complete MTU */ left = gst_rtp_buffer_calc_payload_len (mtu, 0, 0); out = gst_rtp_buffer_new_allocate (left, 0, 0); if (field == 0) { GST_BUFFER_TIMESTAMP (out) = GST_BUFFER_TIMESTAMP (buffer); } else { GST_BUFFER_TIMESTAMP (out) = GST_BUFFER_TIMESTAMP (buffer) + GST_BUFFER_DURATION (buffer) / 2; } gst_rtp_buffer_map (out, GST_MAP_WRITE, &rtp); outdata = gst_rtp_buffer_get_payload (&rtp); GST_LOG_OBJECT (rtpvrawpay, "created buffer of size %u for MTU %u", left, mtu); /* * 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 * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Extended Sequence Number | Length | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |F| Line No |C| Offset | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * | Length |F| Line No | * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ * |C| Offset | . * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ . * . . * . Two (partial) lines of video data . * . . * +---------------------------------------------------------------+ */ /* need 2 bytes for the extended sequence number */ *outdata++ = 0; *outdata++ = 0; left -= 2; /* the headers start here */ headers = outdata; /* while we can fit at least one header and one pixel */ while (left > (6 + pgroup)) { /* we need a 6 bytes header */ left -= 6; /* get how may bytes we need for the remaining pixels */ pixels = width - offset; length = (pixels * pgroup) / rtpvrawpay->xinc; if (left >= length) { /* pixels and header fit completely, we will write them and skip to the * next line. */ next_line = TRUE; } else { /* line does not fit completely, see how many pixels fit */ pixels = (left / pgroup) * rtpvrawpay->xinc; length = (pixels * pgroup) / rtpvrawpay->xinc; next_line = FALSE; } GST_LOG_OBJECT (rtpvrawpay, "filling %u bytes in %u pixels", length, pixels); left -= length; /* write length */ *outdata++ = (length >> 8) & 0xff; *outdata++ = length & 0xff; /* write line no */ *outdata++ = ((line >> 8) & 0x7f) | ((field << 7) & 0x80); *outdata++ = line & 0xff; if (next_line) { /* go to next line we do this here to make the check below easier */ line += rtpvrawpay->yinc; } /* calculate continuation marker */ cont = (left > (6 + pgroup) && line < height) ? 0x80 : 0x00; /* write offset and continuation marker */ *outdata++ = ((offset >> 8) & 0x7f) | cont; *outdata++ = offset & 0xff; if (next_line) { /* reset offset */ offset = 0; GST_LOG_OBJECT (rtpvrawpay, "go to next line %u", line); } else { offset += pixels; GST_LOG_OBJECT (rtpvrawpay, "next offset %u", offset); } if (!cont) break; } GST_LOG_OBJECT (rtpvrawpay, "consumed %u bytes", (guint) (outdata - headers)); /* second pass, read headers and write the data */ while (TRUE) { guint offs, lin; /* read length and cont */ length = (headers[0] << 8) | headers[1]; lin = ((headers[2] & 0x7f) << 8) | headers[3]; offs = ((headers[4] & 0x7f) << 8) | headers[5]; cont = headers[4] & 0x80; pixels = length / pgroup; headers += 6; GST_LOG_OBJECT (payload, "writing length %u, line %u, offset %u, cont %d", length, lin, offs, cont); switch (GST_VIDEO_INFO_FORMAT (&rtpvrawpay->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: offs /= rtpvrawpay->xinc; memcpy (outdata, yp + (lin * ystride) + (offs * pgroup), length); outdata += length; break; case GST_VIDEO_FORMAT_AYUV: { gint i; guint8 *datap; datap = yp + (lin * ystride) + (offs * 4); for (i = 0; i < pixels; i++) { *outdata++ = datap[2]; *outdata++ = datap[1]; *outdata++ = datap[3]; datap += 4; } break; } case GST_VIDEO_FORMAT_I420: { gint i; guint uvoff; guint8 *yd1p, *yd2p, *udp, *vdp; yd1p = yp + (lin * ystride) + (offs); yd2p = yd1p + ystride; uvoff = (lin / rtpvrawpay->yinc * uvstride) + (offs / rtpvrawpay->xinc); udp = up + uvoff; vdp = vp + uvoff; for (i = 0; i < pixels; i++) { *outdata++ = *yd1p++; *outdata++ = *yd1p++; *outdata++ = *yd2p++; *outdata++ = *yd2p++; *outdata++ = *udp++; *outdata++ = *vdp++; } break; } case GST_VIDEO_FORMAT_Y41B: { gint i; guint uvoff; guint8 *ydp, *udp, *vdp; ydp = yp + (lin * ystride) + offs; uvoff = (lin / rtpvrawpay->yinc * uvstride) + (offs / rtpvrawpay->xinc); udp = up + uvoff; vdp = vp + uvoff; for (i = 0; i < pixels; i++) { *outdata++ = *udp++; *outdata++ = *ydp++; *outdata++ = *ydp++; *outdata++ = *vdp++; *outdata++ = *ydp++; *outdata++ = *ydp++; } break; } default: gst_rtp_buffer_unmap (&rtp); gst_buffer_unref (out); goto unknown_sampling; } if (!cont) break; } if (line >= height) { GST_LOG_OBJECT (rtpvrawpay, "field/frame complete, set marker"); gst_rtp_buffer_set_marker (&rtp, TRUE); } gst_rtp_buffer_unmap (&rtp); if (left > 0) { GST_LOG_OBJECT (rtpvrawpay, "we have %u bytes left", left); gst_buffer_resize (out, 0, gst_buffer_get_size (out) - left); } /* push buffer */ ret = gst_rtp_base_payload_push (payload, out); } } gst_video_frame_unmap (&frame); gst_buffer_unref (buffer); return ret; /* ERRORS */ unknown_sampling: { GST_ELEMENT_ERROR (payload, STREAM, FORMAT, (NULL), ("unimplemented sampling")); gst_video_frame_unmap (&frame); gst_buffer_unref (buffer); return GST_FLOW_NOT_SUPPORTED; } } gboolean gst_rtp_vraw_pay_plugin_init (GstPlugin * plugin) { return gst_element_register (plugin, "rtpvrawpay", GST_RANK_SECONDARY, GST_TYPE_RTP_VRAW_PAY); }