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gstreamer/gst/rtp/gstrtpvrawpay.c

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/* 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#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 <wim.taymans@gmail.com>");
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);
}
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