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gstreamer/gst/rtp/gstrtpvrawpay.c
Tim-Philipp Müller 4a28e649c3 rtp: cache meta tag quarks and add more utility functions for metas 
Every g_quark_from_static_string() is a hash table lookup serialised
on the global quark lock in GLib. Let's just look up the two quarks
we need once and cache them locally for future use. While we're at it,
add new utility functions for the two most commonly used tags
(audio + video). Make first argument a gpointer so we don't have to
cast and make the code ugly. These are used for logging purposes
only anyway.
2017-05-24 13:32:10 +01:00

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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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#include <gst/video/video.h>
#include "gstrtpvrawpay.h"
#include "gstrtputils.h"
enum
{
PROP_CHUNKS_PER_FRAME = 1
};
#define DEFAULT_CHUNKS_PER_FRAME 10
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, AYUV, UYVY, I420, Y41B, UYVP }, "
"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);
static void gst_rtp_vraw_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_rtp_vraw_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
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;
GObjectClass *gobject_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstrtpbasepayload_class = (GstRTPBasePayloadClass *) klass;
gobject_class->set_property = gst_rtp_vraw_pay_set_property;
gobject_class->get_property = gst_rtp_vraw_pay_get_property;
g_object_class_install_property (gobject_class,
PROP_CHUNKS_PER_FRAME,
g_param_spec_int ("chunks-per-frame", "Chunks per Frame",
"Split and send out each frame in multiple chunks to reduce overhead",
1, G_MAXINT, DEFAULT_CHUNKS_PER_FRAME,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS)
);
gstrtpbasepayload_class->set_caps = gst_rtp_vraw_pay_setcaps;
gstrtpbasepayload_class->handle_buffer = gst_rtp_vraw_pay_handle_buffer;
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_vraw_pay_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_vraw_pay_sink_template);
gst_element_class_set_static_metadata (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)
{
rtpvrawpay->chunks_per_frame = DEFAULT_CHUNKS_PER_FRAME;
}
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;
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";
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;
break;
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 = 5;
xinc = 2;
depthstr = "10";
break;
default:
goto unknown_format;
break;
}
if (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
yinc *= 2;
}
rtpvrawpay->pgroup = pgroup;
rtpvrawpay->xinc = xinc;
rtpvrawpay->yinc = yinc;
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 (GST_VIDEO_INFO_IS_INTERLACED (&info)) {
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;
gfloat packets_per_packline;
guint pgroups_per_packet;
guint packlines_per_list, buffers_per_list;
guint lines_delay; /* after how many packed lines we push out a buffer list */
guint last_line; /* last pack line number we pushed out a buffer list */
guint line, offset;
guint8 *p0, *yp, *up, *vp;
guint ystride, uvstride;
guint xinc, yinc;
guint pgroup;
guint mtu;
guint width, height;
gint field, fields;
GstVideoFormat format;
GstVideoFrame frame;
gint interlaced;
gboolean use_buffer_lists;
GstBufferList *list = NULL;
GstRTPBuffer rtp = { NULL, };
rtpvrawpay = GST_RTP_VRAW_PAY (payload);
if (!gst_video_frame_map (&frame, &rtpvrawpay->vinfo, buffer, GST_MAP_READ)) {
gst_buffer_unref (buffer);
return GST_FLOW_ERROR;
}
GST_LOG_OBJECT (rtpvrawpay, "new frame of %" G_GSIZE_FORMAT " bytes",
gst_buffer_get_size (buffer));
/* 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);
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 = GST_VIDEO_INFO_IS_INTERLACED (&rtpvrawpay->vinfo);
format = GST_VIDEO_INFO_FORMAT (&rtpvrawpay->vinfo);
yinc = rtpvrawpay->yinc;
xinc = rtpvrawpay->xinc;
/* after how many packed lines we push out a buffer list */
lines_delay = GST_ROUND_UP_4 (height / rtpvrawpay->chunks_per_frame);
/* calculate how many buffers we expect to store in a single buffer list */
pgroups_per_packet = (mtu - (12 + 14)) / pgroup;
packets_per_packline = width / (xinc * pgroups_per_packet * 1.0);
packlines_per_list = height / (yinc * rtpvrawpay->chunks_per_frame);
buffers_per_list = packlines_per_list * packets_per_packline;
buffers_per_list = GST_ROUND_UP_8 (buffers_per_list);
use_buffer_lists = (rtpvrawpay->chunks_per_frame < (height / yinc));
fields = 1 + interlaced;
/* start with line 0, offset 0 */
for (field = 0; field < fields; field++) {
line = field;
offset = 0;
last_line = 0;
if (use_buffer_lists)
list = gst_buffer_list_new_sized (buffers_per_list);
/* write all lines */
while (line < height) {
guint left, pack_line;
GstBuffer *out;
guint8 *outdata, *headers;
gboolean next_line, complete = FALSE;
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_PTS (out) = GST_BUFFER_PTS (buffer);
} else {
GST_BUFFER_PTS (out) = GST_BUFFER_PTS (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;
/* make sure we can fit at least *one* header and pixel */
if (!(left > (6 + pgroup))) {
gst_rtp_buffer_unmap (&rtp);
gst_buffer_unref (out);
goto too_small;
}
/* 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) / 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) * xinc;
length = (pixels * pgroup) / 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 += 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 (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:
case GST_VIDEO_FORMAT_UYVP:
offs /= xinc;
memcpy (outdata, p0 + (lin * ystride) + (offs * pgroup), length);
outdata += length;
break;
case GST_VIDEO_FORMAT_AYUV:
{
gint i;
guint8 *datap;
datap = p0 + (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 / yinc * uvstride) + (offs / 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 / yinc * uvstride) + (offs / 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);
complete = 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);
}
gst_rtp_copy_video_meta (rtpvrawpay, out, buffer);
/* Now either push out the buffer directly */
if (!use_buffer_lists) {
ret = gst_rtp_base_payload_push (payload, out);
continue;
}
/* or add the buffer to buffer list ... */
gst_buffer_list_add (list, out);
/* .. and check if we need to push out the list */
pack_line = (line - field) / fields;
if (complete || (pack_line > last_line && pack_line % lines_delay == 0)) {
GST_LOG_OBJECT (rtpvrawpay, "pushing list of %u buffers up to pack "
"line %u", gst_buffer_list_length (list), pack_line);
ret = gst_rtp_base_payload_push_list (payload, list);
list = NULL;
if (!complete)
list = gst_buffer_list_new_sized (buffers_per_list);
last_line = pack_line;
}
}
}
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;
}
too_small:
{
GST_ELEMENT_ERROR (payload, RESOURCE, NO_SPACE_LEFT,
(NULL), ("not enough space to send at least one pixel"));
gst_video_frame_unmap (&frame);
gst_buffer_unref (buffer);
return GST_FLOW_NOT_SUPPORTED;
}
}
static void
gst_rtp_vraw_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpVRawPay *rtpvrawpay;
rtpvrawpay = GST_RTP_VRAW_PAY (object);
switch (prop_id) {
case PROP_CHUNKS_PER_FRAME:
rtpvrawpay->chunks_per_frame = g_value_get_int (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_vraw_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRtpVRawPay *rtpvrawpay;
rtpvrawpay = GST_RTP_VRAW_PAY (object);
switch (prop_id) {
case PROP_CHUNKS_PER_FRAME:
g_value_set_int (value, rtpvrawpay->chunks_per_frame);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
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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