gstreamer/gst/rtp/gstrtph263pdepay.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

403 lines
11 KiB
C

/* GStreamer
* Copyright (C) <2005> 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 "gstrtph263pdepay.h"
#include "gstrtputils.h"
GST_DEBUG_CATEGORY_STATIC (rtph263pdepay_debug);
#define GST_CAT_DEFAULT (rtph263pdepay_debug)
static GstStaticPadTemplate gst_rtp_h263p_depay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-h263, " "variant = (string) \"itu\" ")
);
static GstStaticPadTemplate gst_rtp_h263p_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) [1, MAX], "
"encoding-name = (string) \"H263-1998\"; "
/* optional params */
/* NOTE all optional SDP params must be strings in the caps */
/*
"sqcif = (string) [1, 32], "
"qcif = (string) [1, 32], "
"cif = (string) [1, 32], "
"cif4 = (string) [1, 32], "
"cif16 = (string) [1, 32], "
"custom = (string) ANY, "
"f = (string) {0, 1},"
"i = (string) {0, 1},"
"j = (string) {0, 1},"
"t = (string) {0, 1},"
"k = (string) {1, 2, 3, 4},"
"n = (string) {1, 2, 3, 4},"
"p = (string) ANY,"
"par = (string) ANY, "
"cpcf = (string) ANY, "
"bpp = (string) [0, 65536], "
"hrd = (string) {0, 1}; "
*/
"application/x-rtp, "
"media = (string) \"video\", "
"clock-rate = (int) [1, MAX], "
"encoding-name = (string) \"H263-2000\" "
/* optional params */
/* NOTE all optional SDP params must be strings in the caps */
/*
"profile = (string) [0, 10], "
"level = (string) {10, 20, 30, 40, 45, 50, 60, 70}, "
"interlace = (string) {0, 1};"
*/
)
);
#define gst_rtp_h263p_depay_parent_class parent_class
G_DEFINE_TYPE (GstRtpH263PDepay, gst_rtp_h263p_depay,
GST_TYPE_RTP_BASE_DEPAYLOAD);
static void gst_rtp_h263p_depay_finalize (GObject * object);
static GstStateChangeReturn gst_rtp_h263p_depay_change_state (GstElement *
element, GstStateChange transition);
static GstBuffer *gst_rtp_h263p_depay_process (GstRTPBaseDepayload * depayload,
GstRTPBuffer * rtp);
gboolean gst_rtp_h263p_depay_setcaps (GstRTPBaseDepayload * filter,
GstCaps * caps);
static void
gst_rtp_h263p_depay_class_init (GstRtpH263PDepayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
gobject_class->finalize = gst_rtp_h263p_depay_finalize;
gstelement_class->change_state = gst_rtp_h263p_depay_change_state;
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_h263p_depay_src_template);
gst_element_class_add_static_pad_template (gstelement_class,
&gst_rtp_h263p_depay_sink_template);
gst_element_class_set_static_metadata (gstelement_class,
"RTP H263 depayloader", "Codec/Depayloader/Network/RTP",
"Extracts H263/+/++ video from RTP packets (RFC 4629)",
"Wim Taymans <wim.taymans@gmail.com>");
gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_h263p_depay_process;
gstrtpbasedepayload_class->set_caps = gst_rtp_h263p_depay_setcaps;
GST_DEBUG_CATEGORY_INIT (rtph263pdepay_debug, "rtph263pdepay", 0,
"H263+ Video RTP Depayloader");
}
static void
gst_rtp_h263p_depay_init (GstRtpH263PDepay * rtph263pdepay)
{
rtph263pdepay->adapter = gst_adapter_new ();
}
static void
gst_rtp_h263p_depay_finalize (GObject * object)
{
GstRtpH263PDepay *rtph263pdepay;
rtph263pdepay = GST_RTP_H263P_DEPAY (object);
g_object_unref (rtph263pdepay->adapter);
rtph263pdepay->adapter = NULL;
G_OBJECT_CLASS (parent_class)->finalize (object);
}
gboolean
gst_rtp_h263p_depay_setcaps (GstRTPBaseDepayload * filter, GstCaps * caps)
{
GstCaps *srccaps = NULL;
GstStructure *structure = gst_caps_get_structure (caps, 0);
gint clock_rate;
const gchar *encoding_name = NULL;
gboolean res;
if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
clock_rate = 90000; /* default */
filter->clock_rate = clock_rate;
encoding_name = gst_structure_get_string (structure, "encoding-name");
if (encoding_name == NULL)
goto no_encoding_name;
if (g_ascii_strcasecmp (encoding_name, "H263-2000") == 0) {
/* always h263++ */
srccaps = gst_caps_new_simple ("video/x-h263",
"variant", G_TYPE_STRING, "itu",
"h263version", G_TYPE_STRING, "h263pp", NULL);
} else if (g_ascii_strcasecmp (encoding_name, "H263-1998") == 0) {
/* this can be H263 or H263+ depending on defined appendixes in the optional
* SDP params */
const gchar *F, *I, *J, *T, *K, *N, *P;
gboolean is_h263p = FALSE;
F = gst_structure_get_string (structure, "f");
if (F)
if (g_ascii_strcasecmp (F, "1") == 0)
is_h263p = TRUE;
I = gst_structure_get_string (structure, "i");
if (I)
if (g_ascii_strcasecmp (I, "1") == 0)
is_h263p = TRUE;
J = gst_structure_get_string (structure, "j");
if (J)
if (g_ascii_strcasecmp (J, "1") == 0)
is_h263p = TRUE;
T = gst_structure_get_string (structure, "t");
if (T)
if (g_ascii_strcasecmp (T, "1") == 0)
is_h263p = TRUE;
K = gst_structure_get_string (structure, "k");
if (K)
is_h263p = TRUE;
N = gst_structure_get_string (structure, "n");
if (N)
is_h263p = TRUE;
P = gst_structure_get_string (structure, "p");
if (P)
is_h263p = TRUE;
if (is_h263p) {
srccaps = gst_caps_new_simple ("video/x-h263",
"variant", G_TYPE_STRING, "itu",
"h263version", G_TYPE_STRING, "h263p", NULL);
} else {
srccaps = gst_caps_new_simple ("video/x-h263",
"variant", G_TYPE_STRING, "itu",
"h263version", G_TYPE_STRING, "h263", NULL);
}
}
if (!srccaps)
goto no_caps;
res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (filter), srccaps);
gst_caps_unref (srccaps);
return res;
/* ERRORS */
no_encoding_name:
{
GST_ERROR_OBJECT (filter, "no encoding-name");
return FALSE;
}
no_caps:
{
GST_ERROR_OBJECT (filter, "invalid encoding-name");
return FALSE;
}
}
static GstBuffer *
gst_rtp_h263p_depay_process (GstRTPBaseDepayload * depayload,
GstRTPBuffer * rtp)
{
GstRtpH263PDepay *rtph263pdepay;
GstBuffer *outbuf;
gint payload_len;
guint8 *payload;
gboolean P, V, M;
guint header_len;
guint8 PLEN, PEBIT;
rtph263pdepay = GST_RTP_H263P_DEPAY (depayload);
/* flush remaining data on discont */
if (GST_BUFFER_IS_DISCONT (rtp->buffer)) {
GST_LOG_OBJECT (depayload, "DISCONT, flushing adapter");
gst_adapter_clear (rtph263pdepay->adapter);
rtph263pdepay->wait_start = TRUE;
}
payload_len = gst_rtp_buffer_get_payload_len (rtp);
header_len = 2;
if (payload_len < header_len)
goto too_small;
payload = gst_rtp_buffer_get_payload (rtp);
M = gst_rtp_buffer_get_marker (rtp);
/* 0 1
* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | RR |P|V| PLEN |PEBIT|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
P = (payload[0] & 0x04) == 0x04;
V = (payload[0] & 0x02) == 0x02;
PLEN = ((payload[0] & 0x1) << 5) | (payload[1] >> 3);
PEBIT = payload[1] & 0x7;
GST_LOG_OBJECT (depayload, "P %d, V %d, PLEN %d, PEBIT %d", P, V, PLEN,
PEBIT);
if (V) {
header_len++;
}
if (PLEN) {
header_len += PLEN;
}
if ((!P && payload_len < header_len) || (P && payload_len < header_len - 2))
goto too_small;
if (P) {
rtph263pdepay->wait_start = FALSE;
header_len -= 2;
}
if (rtph263pdepay->wait_start)
goto waiting_start;
if (payload_len < header_len)
goto too_small;
/* FIXME do not ignore the VRC header (See RFC 2429 section 4.2) */
/* FIXME actually use the RTP picture header when it is lost in the network */
/* for now strip off header */
payload_len -= header_len;
if (M) {
/* frame is completed: append to previous, push it out */
guint len, padlen;
guint avail;
GstBuffer *padbuf;
GST_LOG_OBJECT (depayload, "Frame complete");
outbuf =
gst_rtp_buffer_get_payload_subbuffer (rtp, header_len, payload_len);
if (P)
gst_buffer_memset (outbuf, 0, 0, 2);
gst_adapter_push (rtph263pdepay->adapter, outbuf);
outbuf = NULL;
avail = gst_adapter_available (rtph263pdepay->adapter);
len = avail + payload_len;
padlen = (len % 4) + 4;
if (avail == 0)
goto empty_frame;
outbuf = gst_adapter_take_buffer (rtph263pdepay->adapter, avail);
if (padlen) {
padbuf = gst_buffer_new_and_alloc (padlen);
gst_buffer_memset (padbuf, 0, 0, padlen);
outbuf = gst_buffer_append (outbuf, padbuf);
}
gst_rtp_drop_non_video_meta (rtph263pdepay, outbuf);
return outbuf;
} else {
/* frame not completed: store in adapter */
GST_LOG_OBJECT (depayload, "Frame incomplete, storing %d", payload_len);
outbuf =
gst_rtp_buffer_get_payload_subbuffer (rtp, header_len, payload_len);
if (P)
gst_buffer_memset (outbuf, 0, 0, 2);
gst_adapter_push (rtph263pdepay->adapter, outbuf);
}
return NULL;
too_small:
{
GST_ELEMENT_WARNING (rtph263pdepay, STREAM, DECODE,
("Packet payload was too small"), (NULL));
return NULL;
}
waiting_start:
{
GST_DEBUG_OBJECT (rtph263pdepay, "waiting for picture start");
return NULL;
}
empty_frame:
{
GST_WARNING_OBJECT (rtph263pdepay, "Depayloaded frame is empty, dropping");
return NULL;
}
}
static GstStateChangeReturn
gst_rtp_h263p_depay_change_state (GstElement * element,
GstStateChange transition)
{
GstRtpH263PDepay *rtph263pdepay;
GstStateChangeReturn ret;
rtph263pdepay = GST_RTP_H263P_DEPAY (element);
switch (transition) {
case GST_STATE_CHANGE_NULL_TO_READY:
break;
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_adapter_clear (rtph263pdepay->adapter);
rtph263pdepay->wait_start = TRUE;
break;
default:
break;
}
ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_NULL:
break;
default:
break;
}
return ret;
}
gboolean
gst_rtp_h263p_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtph263pdepay",
GST_RANK_SECONDARY, GST_TYPE_RTP_H263P_DEPAY);
}