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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.
403 lines
11 KiB
C
403 lines
11 KiB
C
/* GStreamer
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* Copyright (C) <2005> Wim Taymans <wim.taymans@gmail.com>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <string.h>
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#include <gst/rtp/gstrtpbuffer.h>
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#include <gst/video/video.h>
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#include "gstrtph263pdepay.h"
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#include "gstrtputils.h"
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GST_DEBUG_CATEGORY_STATIC (rtph263pdepay_debug);
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#define GST_CAT_DEFAULT (rtph263pdepay_debug)
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static GstStaticPadTemplate gst_rtp_h263p_depay_src_template =
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GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-h263, " "variant = (string) \"itu\" ")
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);
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static GstStaticPadTemplate gst_rtp_h263p_depay_sink_template =
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GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("application/x-rtp, "
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"media = (string) \"video\", "
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"clock-rate = (int) [1, MAX], "
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"encoding-name = (string) \"H263-1998\"; "
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/* optional params */
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/* NOTE all optional SDP params must be strings in the caps */
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/*
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"sqcif = (string) [1, 32], "
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"qcif = (string) [1, 32], "
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"cif = (string) [1, 32], "
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"cif4 = (string) [1, 32], "
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"cif16 = (string) [1, 32], "
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"custom = (string) ANY, "
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"f = (string) {0, 1},"
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"i = (string) {0, 1},"
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"j = (string) {0, 1},"
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"t = (string) {0, 1},"
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"k = (string) {1, 2, 3, 4},"
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"n = (string) {1, 2, 3, 4},"
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"p = (string) ANY,"
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"par = (string) ANY, "
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"cpcf = (string) ANY, "
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"bpp = (string) [0, 65536], "
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"hrd = (string) {0, 1}; "
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*/
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"application/x-rtp, "
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"media = (string) \"video\", "
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"clock-rate = (int) [1, MAX], "
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"encoding-name = (string) \"H263-2000\" "
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/* optional params */
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/* NOTE all optional SDP params must be strings in the caps */
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/*
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"profile = (string) [0, 10], "
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"level = (string) {10, 20, 30, 40, 45, 50, 60, 70}, "
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"interlace = (string) {0, 1};"
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*/
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)
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);
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#define gst_rtp_h263p_depay_parent_class parent_class
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G_DEFINE_TYPE (GstRtpH263PDepay, gst_rtp_h263p_depay,
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GST_TYPE_RTP_BASE_DEPAYLOAD);
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static void gst_rtp_h263p_depay_finalize (GObject * object);
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static GstStateChangeReturn gst_rtp_h263p_depay_change_state (GstElement *
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element, GstStateChange transition);
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static GstBuffer *gst_rtp_h263p_depay_process (GstRTPBaseDepayload * depayload,
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GstRTPBuffer * rtp);
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gboolean gst_rtp_h263p_depay_setcaps (GstRTPBaseDepayload * filter,
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GstCaps * caps);
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static void
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gst_rtp_h263p_depay_class_init (GstRtpH263PDepayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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GstRTPBaseDepayloadClass *gstrtpbasedepayload_class;
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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gstrtpbasedepayload_class = (GstRTPBaseDepayloadClass *) klass;
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gobject_class->finalize = gst_rtp_h263p_depay_finalize;
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gstelement_class->change_state = gst_rtp_h263p_depay_change_state;
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_rtp_h263p_depay_src_template);
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gst_element_class_add_static_pad_template (gstelement_class,
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&gst_rtp_h263p_depay_sink_template);
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gst_element_class_set_static_metadata (gstelement_class,
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"RTP H263 depayloader", "Codec/Depayloader/Network/RTP",
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"Extracts H263/+/++ video from RTP packets (RFC 4629)",
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"Wim Taymans <wim.taymans@gmail.com>");
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gstrtpbasedepayload_class->process_rtp_packet = gst_rtp_h263p_depay_process;
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gstrtpbasedepayload_class->set_caps = gst_rtp_h263p_depay_setcaps;
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GST_DEBUG_CATEGORY_INIT (rtph263pdepay_debug, "rtph263pdepay", 0,
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"H263+ Video RTP Depayloader");
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}
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static void
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gst_rtp_h263p_depay_init (GstRtpH263PDepay * rtph263pdepay)
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{
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rtph263pdepay->adapter = gst_adapter_new ();
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}
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static void
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gst_rtp_h263p_depay_finalize (GObject * object)
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{
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GstRtpH263PDepay *rtph263pdepay;
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rtph263pdepay = GST_RTP_H263P_DEPAY (object);
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g_object_unref (rtph263pdepay->adapter);
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rtph263pdepay->adapter = NULL;
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G_OBJECT_CLASS (parent_class)->finalize (object);
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}
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gboolean
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gst_rtp_h263p_depay_setcaps (GstRTPBaseDepayload * filter, GstCaps * caps)
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{
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GstCaps *srccaps = NULL;
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GstStructure *structure = gst_caps_get_structure (caps, 0);
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gint clock_rate;
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const gchar *encoding_name = NULL;
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gboolean res;
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if (!gst_structure_get_int (structure, "clock-rate", &clock_rate))
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clock_rate = 90000; /* default */
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filter->clock_rate = clock_rate;
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encoding_name = gst_structure_get_string (structure, "encoding-name");
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if (encoding_name == NULL)
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goto no_encoding_name;
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if (g_ascii_strcasecmp (encoding_name, "H263-2000") == 0) {
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/* always h263++ */
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srccaps = gst_caps_new_simple ("video/x-h263",
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"variant", G_TYPE_STRING, "itu",
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"h263version", G_TYPE_STRING, "h263pp", NULL);
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} else if (g_ascii_strcasecmp (encoding_name, "H263-1998") == 0) {
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/* this can be H263 or H263+ depending on defined appendixes in the optional
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* SDP params */
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const gchar *F, *I, *J, *T, *K, *N, *P;
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gboolean is_h263p = FALSE;
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F = gst_structure_get_string (structure, "f");
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if (F)
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if (g_ascii_strcasecmp (F, "1") == 0)
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is_h263p = TRUE;
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I = gst_structure_get_string (structure, "i");
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if (I)
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if (g_ascii_strcasecmp (I, "1") == 0)
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is_h263p = TRUE;
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J = gst_structure_get_string (structure, "j");
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if (J)
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if (g_ascii_strcasecmp (J, "1") == 0)
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is_h263p = TRUE;
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T = gst_structure_get_string (structure, "t");
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if (T)
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if (g_ascii_strcasecmp (T, "1") == 0)
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is_h263p = TRUE;
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K = gst_structure_get_string (structure, "k");
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if (K)
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is_h263p = TRUE;
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N = gst_structure_get_string (structure, "n");
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if (N)
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is_h263p = TRUE;
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P = gst_structure_get_string (structure, "p");
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if (P)
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is_h263p = TRUE;
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if (is_h263p) {
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srccaps = gst_caps_new_simple ("video/x-h263",
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"variant", G_TYPE_STRING, "itu",
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"h263version", G_TYPE_STRING, "h263p", NULL);
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} else {
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srccaps = gst_caps_new_simple ("video/x-h263",
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"variant", G_TYPE_STRING, "itu",
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"h263version", G_TYPE_STRING, "h263", NULL);
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}
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}
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if (!srccaps)
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goto no_caps;
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res = gst_pad_set_caps (GST_RTP_BASE_DEPAYLOAD_SRCPAD (filter), srccaps);
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gst_caps_unref (srccaps);
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return res;
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/* ERRORS */
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no_encoding_name:
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{
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GST_ERROR_OBJECT (filter, "no encoding-name");
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return FALSE;
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}
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no_caps:
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{
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GST_ERROR_OBJECT (filter, "invalid encoding-name");
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return FALSE;
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}
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}
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static GstBuffer *
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gst_rtp_h263p_depay_process (GstRTPBaseDepayload * depayload,
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GstRTPBuffer * rtp)
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{
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GstRtpH263PDepay *rtph263pdepay;
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GstBuffer *outbuf;
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gint payload_len;
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guint8 *payload;
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gboolean P, V, M;
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guint header_len;
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guint8 PLEN, PEBIT;
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rtph263pdepay = GST_RTP_H263P_DEPAY (depayload);
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/* flush remaining data on discont */
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if (GST_BUFFER_IS_DISCONT (rtp->buffer)) {
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GST_LOG_OBJECT (depayload, "DISCONT, flushing adapter");
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gst_adapter_clear (rtph263pdepay->adapter);
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rtph263pdepay->wait_start = TRUE;
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}
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payload_len = gst_rtp_buffer_get_payload_len (rtp);
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header_len = 2;
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if (payload_len < header_len)
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goto too_small;
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payload = gst_rtp_buffer_get_payload (rtp);
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M = gst_rtp_buffer_get_marker (rtp);
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/* 0 1
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* 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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* | RR |P|V| PLEN |PEBIT|
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* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
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*/
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P = (payload[0] & 0x04) == 0x04;
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V = (payload[0] & 0x02) == 0x02;
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PLEN = ((payload[0] & 0x1) << 5) | (payload[1] >> 3);
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PEBIT = payload[1] & 0x7;
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GST_LOG_OBJECT (depayload, "P %d, V %d, PLEN %d, PEBIT %d", P, V, PLEN,
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PEBIT);
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if (V) {
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header_len++;
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}
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if (PLEN) {
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header_len += PLEN;
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}
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if ((!P && payload_len < header_len) || (P && payload_len < header_len - 2))
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goto too_small;
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if (P) {
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rtph263pdepay->wait_start = FALSE;
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header_len -= 2;
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}
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if (rtph263pdepay->wait_start)
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goto waiting_start;
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if (payload_len < header_len)
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goto too_small;
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/* FIXME do not ignore the VRC header (See RFC 2429 section 4.2) */
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/* FIXME actually use the RTP picture header when it is lost in the network */
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/* for now strip off header */
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payload_len -= header_len;
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if (M) {
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/* frame is completed: append to previous, push it out */
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guint len, padlen;
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guint avail;
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GstBuffer *padbuf;
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GST_LOG_OBJECT (depayload, "Frame complete");
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outbuf =
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gst_rtp_buffer_get_payload_subbuffer (rtp, header_len, payload_len);
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if (P)
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gst_buffer_memset (outbuf, 0, 0, 2);
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gst_adapter_push (rtph263pdepay->adapter, outbuf);
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outbuf = NULL;
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avail = gst_adapter_available (rtph263pdepay->adapter);
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len = avail + payload_len;
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padlen = (len % 4) + 4;
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if (avail == 0)
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goto empty_frame;
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outbuf = gst_adapter_take_buffer (rtph263pdepay->adapter, avail);
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if (padlen) {
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padbuf = gst_buffer_new_and_alloc (padlen);
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gst_buffer_memset (padbuf, 0, 0, padlen);
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outbuf = gst_buffer_append (outbuf, padbuf);
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}
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gst_rtp_drop_non_video_meta (rtph263pdepay, outbuf);
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return outbuf;
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} else {
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/* frame not completed: store in adapter */
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GST_LOG_OBJECT (depayload, "Frame incomplete, storing %d", payload_len);
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outbuf =
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gst_rtp_buffer_get_payload_subbuffer (rtp, header_len, payload_len);
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if (P)
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gst_buffer_memset (outbuf, 0, 0, 2);
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gst_adapter_push (rtph263pdepay->adapter, outbuf);
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}
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return NULL;
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too_small:
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{
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GST_ELEMENT_WARNING (rtph263pdepay, STREAM, DECODE,
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("Packet payload was too small"), (NULL));
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return NULL;
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}
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waiting_start:
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{
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GST_DEBUG_OBJECT (rtph263pdepay, "waiting for picture start");
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return NULL;
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}
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empty_frame:
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{
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GST_WARNING_OBJECT (rtph263pdepay, "Depayloaded frame is empty, dropping");
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return NULL;
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}
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}
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static GstStateChangeReturn
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gst_rtp_h263p_depay_change_state (GstElement * element,
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GstStateChange transition)
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{
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GstRtpH263PDepay *rtph263pdepay;
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GstStateChangeReturn ret;
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rtph263pdepay = GST_RTP_H263P_DEPAY (element);
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switch (transition) {
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case GST_STATE_CHANGE_NULL_TO_READY:
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break;
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case GST_STATE_CHANGE_READY_TO_PAUSED:
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gst_adapter_clear (rtph263pdepay->adapter);
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rtph263pdepay->wait_start = TRUE;
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break;
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default:
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break;
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}
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ret = GST_ELEMENT_CLASS (parent_class)->change_state (element, transition);
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switch (transition) {
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case GST_STATE_CHANGE_READY_TO_NULL:
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break;
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default:
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break;
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}
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return ret;
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}
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gboolean
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gst_rtp_h263p_depay_plugin_init (GstPlugin * plugin)
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{
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return gst_element_register (plugin, "rtph263pdepay",
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GST_RANK_SECONDARY, GST_TYPE_RTP_H263P_DEPAY);
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}
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