diff options
author | Wim Taymans <wim.taymans@gmail.com> | 2006-02-10 16:40:58 +0000 |
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committer | Wim Taymans <wim.taymans@gmail.com> | 2006-02-10 16:40:58 +0000 |
commit | f9d2e49e40269dda8dc1fa7db6b7037a188e4a00 (patch) | |
tree | b22d667b002e9c1a7b8e3ae5b06903416bb07c00 /gst/rtp/gstrtpmp4gpay.c | |
parent | 946e1e43637e78c263c82d449ec19dfd84ed8269 (diff) |
gst/rtp/README: Say something about case-sensitivity of caps vs mime-attributes.
Original commit message from CVS:
* gst/rtp/README:
Say something about case-sensitivity of caps vs mime-attributes.
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpamrpay.c: (gst_rtp_amr_pay_class_init),
(gst_rtp_amr_pay_handle_buffer):
* gst/rtp/gstrtpmp4gpay.c: (gst_rtp_mp4g_pay_get_type),
(gst_rtp_mp4g_pay_base_init), (gst_rtp_mp4g_pay_class_init),
(gst_rtp_mp4g_pay_init), (gst_rtp_mp4g_pay_finalize),
(gst_rtp_mp4g_pay_new_caps), (gst_rtp_mp4g_pay_setcaps),
(gst_rtp_mp4g_pay_flush), (gst_rtp_mp4g_pay_handle_buffer),
(gst_rtp_mp4g_pay_set_property), (gst_rtp_mp4g_pay_get_property),
(gst_rtp_mp4g_pay_plugin_init):
* gst/rtp/gstrtpmp4gpay.h:
Added beginnings of mpeg4-generic payloader (RFC 3640)
Diffstat (limited to 'gst/rtp/gstrtpmp4gpay.c')
-rw-r--r-- | gst/rtp/gstrtpmp4gpay.c | 374 |
1 files changed, 374 insertions, 0 deletions
diff --git a/gst/rtp/gstrtpmp4gpay.c b/gst/rtp/gstrtpmp4gpay.c new file mode 100644 index 00000000..db6ea9f8 --- /dev/null +++ b/gst/rtp/gstrtpmp4gpay.c @@ -0,0 +1,374 @@ +/* GStreamer + * Copyright (C) <2006> Wim Taymans <wim@fluendo.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 + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" +#endif + +#include <string.h> + +#include <gst/rtp/gstrtpbuffer.h> + +#include "gstrtpmp4gpay.h" + +GST_DEBUG_CATEGORY (rtpmp4gpay_debug); +#define GST_CAT_DEFAULT (rtpmp4gpay_debug) + +/* elementfactory information */ +static GstElementDetails gst_rtp_mp4gpay_details = { + "RTP packet parser", + "Codec/Payloader/Network", + "Payload MPEG4 elementary streams as RTP packets (RFC 3640)", + "Wim Taymans <wim@fluendo.com>" +}; + +static GstStaticPadTemplate gst_rtp_mp4g_pay_sink_template = + GST_STATIC_PAD_TEMPLATE ("sink", + GST_PAD_SINK, + GST_PAD_ALWAYS, + GST_STATIC_CAPS ("video/mpeg," + "mpegversion=(int) 4," + "systemstream=(boolean)false;" "audio/mpeg," "mpegversion=(int) 4") + ); + +static GstStaticPadTemplate gst_rtp_mp4g_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) [ 96, 127 ], " + "clock-rate = (int) [1, MAX ], " + "encoding-name = (string) \"MP4G-ES\", " + /* required string params */ + "streamtype = (string) { \"4\", \"5\" }, " /* 4 = video, 5 = audio */ + "profile-level-id = (int) [1,MAX], " + /* "config = (string) [1,MAX]" */ + "mode = (string) { \"generic\", \"CELP-cbr\", \"CELP-vbr\", \"AAC-lbr\", \"AAC-hbr\" }, " + /* Optional general parameters */ + "objecttype = (int) [1,MAX], " "constantsize = (int) [1,MAX], " /* constant size of each AU */ + "constantduration = (int) [1,MAX], " /* constant duration of each AU */ + "maxdisplacement = (int) [1,MAX], " + "de-interleavebuffersize: = (int) [1,MAX], " + /* Optional configuration parameters */ + "sizelength = (int) [1, 16], " /* max 16 bits, should be enough... */ + "indexlength = (int) [1, 8], " + "indexdeltalength = (int) [1, 8], " + "ctsdeltalength = (int) [1, 64], " + "dtsdeltalength = (int) [1, 64], " + "randomaccessindication = (int) {0, 1}, " + "streamstateindication = (int) [0, 64], " + "auxiliarydatasizelength = (int) [0, 64]") + ); + +enum +{ + PROP_0, +}; + + +static void gst_rtp_mp4g_pay_class_init (GstRtpMP4GPayClass * klass); +static void gst_rtp_mp4g_pay_base_init (GstRtpMP4GPayClass * klass); +static void gst_rtp_mp4g_pay_init (GstRtpMP4GPay * rtpmp4gpay); +static void gst_rtp_mp4g_pay_finalize (GObject * object); + +static void gst_rtp_mp4g_pay_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec); +static void gst_rtp_mp4g_pay_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec); + +static gboolean gst_rtp_mp4g_pay_setcaps (GstBaseRTPPayload * payload, + GstCaps * caps); +static GstFlowReturn gst_rtp_mp4g_pay_handle_buffer (GstBaseRTPPayload * + payload, GstBuffer * buffer); + +static GstBaseRTPPayloadClass *parent_class = NULL; + +static GType +gst_rtp_mp4g_pay_get_type (void) +{ + static GType rtpmp4gpay_type = 0; + + if (!rtpmp4gpay_type) { + static const GTypeInfo rtpmp4gpay_info = { + sizeof (GstRtpMP4GPayClass), + (GBaseInitFunc) gst_rtp_mp4g_pay_base_init, + NULL, + (GClassInitFunc) gst_rtp_mp4g_pay_class_init, + NULL, + NULL, + sizeof (GstRtpMP4GPay), + 0, + (GInstanceInitFunc) gst_rtp_mp4g_pay_init, + }; + + rtpmp4gpay_type = + g_type_register_static (GST_TYPE_BASE_RTP_PAYLOAD, "GstRtpMP4GPay", + &rtpmp4gpay_info, 0); + } + return rtpmp4gpay_type; +} + +static void +gst_rtp_mp4g_pay_base_init (GstRtpMP4GPayClass * klass) +{ + GstElementClass *element_class = GST_ELEMENT_CLASS (klass); + + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&gst_rtp_mp4g_pay_src_template)); + gst_element_class_add_pad_template (element_class, + gst_static_pad_template_get (&gst_rtp_mp4g_pay_sink_template)); + + gst_element_class_set_details (element_class, &gst_rtp_mp4gpay_details); +} + +static void +gst_rtp_mp4g_pay_class_init (GstRtpMP4GPayClass * klass) +{ + GObjectClass *gobject_class; + GstElementClass *gstelement_class; + GstBaseRTPPayloadClass *gstbasertppayload_class; + + gobject_class = (GObjectClass *) klass; + gstelement_class = (GstElementClass *) klass; + gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass; + + parent_class = g_type_class_ref (GST_TYPE_BASE_RTP_PAYLOAD); + + gobject_class->set_property = gst_rtp_mp4g_pay_set_property; + gobject_class->get_property = gst_rtp_mp4g_pay_get_property; + + gobject_class->finalize = gst_rtp_mp4g_pay_finalize; + + gstbasertppayload_class->set_caps = gst_rtp_mp4g_pay_setcaps; + gstbasertppayload_class->handle_buffer = gst_rtp_mp4g_pay_handle_buffer; + + GST_DEBUG_CATEGORY_INIT (rtpmp4gpay_debug, "rtpmp4gpay", 0, + "MP4-generic RTP Payloader"); + +} + +static void +gst_rtp_mp4g_pay_init (GstRtpMP4GPay * rtpmp4gpay) +{ + rtpmp4gpay->adapter = gst_adapter_new (); + rtpmp4gpay->rate = 90000; + rtpmp4gpay->profile = 1; +} + +static void +gst_rtp_mp4g_pay_finalize (GObject * object) +{ + GstRtpMP4GPay *rtpmp4gpay; + + rtpmp4gpay = GST_RTP_MP4G_PAY (object); + + g_object_unref (rtpmp4gpay->adapter); + rtpmp4gpay->adapter = NULL; + + G_OBJECT_CLASS (parent_class)->finalize (object); +} + +#if 0 +static void +gst_rtp_mp4g_pay_new_caps (GstRtpMP4GPay * rtpmp4gpay) +{ + gchar *profile, *config; + GValue v = { 0 }; + + profile = g_strdup_printf ("%d", rtpmp4gpay->profile); + g_value_init (&v, GST_TYPE_BUFFER); + gst_value_set_buffer (&v, rtpmp4gpay->config); + config = gst_value_serialize (&v); + + gst_basertppayload_set_outcaps (GST_BASE_RTP_PAYLOAD (rtpmp4gpay), + "profile-level-id", G_TYPE_STRING, profile, + "config", G_TYPE_STRING, config, NULL); + + g_value_unset (&v); + + g_free (profile); + g_free (config); +} +#endif + +static gboolean +gst_rtp_mp4g_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps) +{ + GstRtpMP4GPay *rtpmp4gpay; + + rtpmp4gpay = GST_RTP_MP4G_PAY (payload); + + gst_basertppayload_set_options (payload, "video", TRUE, "mpeg4-generic", + rtpmp4gpay->rate); + + return TRUE; +} + +static GstFlowReturn +gst_rtp_mp4g_pay_flush (GstRtpMP4GPay * rtpmp4gpay) +{ + guint avail, total; + GstBuffer *outbuf; + GstFlowReturn ret; + gboolean fragmented; + guint mtu; + + fragmented = FALSE; + + /* the data available in the adapter is either smaller + * than the MTU or bigger. In the case it is smaller, the complete + * adapter contents can be put in one packet. In the case the + * adapter has more than one MTU, we need to fragment the MPEG data + * over multiple packets. */ + total = avail = gst_adapter_available (rtpmp4gpay->adapter); + + ret = GST_FLOW_OK; + mtu = GST_BASE_RTP_PAYLOAD_MTU (rtpmp4gpay); + + while (avail > 0) { + guint towrite; + guint8 *payload; + guint8 *data; + guint payload_len; + guint packet_len; + + /* this will be the total lenght of the packet */ + packet_len = gst_rtp_buffer_calc_packet_len (avail, 0, 0); + + /* fill one MTU or all available bytes, we need 4 spare bytes for + * the AU header. */ + towrite = MIN (packet_len, mtu - 4); + + /* this is the payload length */ + payload_len = gst_rtp_buffer_calc_payload_len (towrite, 0, 0); + + GST_DEBUG_OBJECT (rtpmp4gpay, + "avail %d, towrite %d, packet_len %d, payload_len %d", avail, towrite, + packet_len, payload_len); + + /* create buffer to hold the payload, also make room for the 4 header bytes. */ + outbuf = gst_rtp_buffer_new_allocate (payload_len + 4, 0, 0); + + /* copy payload */ + payload = gst_rtp_buffer_get_payload (outbuf); + + /* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+ + * |AU-headers-length|AU-header|AU-header| |AU-header|padding| + * | | (1) | (2) | | (n) | bits | + * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+- .. -+-+-+-+-+-+-+-+-+-+ + */ + /* AU-headers-length, we only have 1 AU-header */ + payload[0] = 0x00; + payload[1] = 0x10; /* we use 16 bits for the header */ + + /* +---------------------------------------+ + * | AU-size | + * +---------------------------------------+ + * | AU-Index / AU-Index-delta | + * +---------------------------------------+ + * | CTS-flag | + * +---------------------------------------+ + * | CTS-delta | + * +---------------------------------------+ + * | DTS-flag | + * +---------------------------------------+ + * | DTS-delta | + * +---------------------------------------+ + * | RAP-flag | + * +---------------------------------------+ + * | Stream-state | + * +---------------------------------------+ + */ + /* The AU-header, no CTS, DTS, RAP, Stream-state + * + * AU-size is always the total size of the AU, not the fragmented size + */ + payload[2] = (total & 0x1fe0) >> 5; + payload[3] = (total & 0x1f) << 3; /* we use 13 bits for the size, 3 bits index */ + + data = (guint8 *) gst_adapter_peek (rtpmp4gpay->adapter, payload_len); + memcpy (&payload[4], data, payload_len); + + gst_adapter_flush (rtpmp4gpay->adapter, payload_len); + + gst_rtp_buffer_set_marker (outbuf, avail > payload_len); + + GST_BUFFER_TIMESTAMP (outbuf) = rtpmp4gpay->first_ts; + + ret = gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtpmp4gpay), outbuf); + + avail -= payload_len; + fragmented = TRUE; + } + + return ret; +} + +/* we expect buffers as exactly one complete AU + */ +static GstFlowReturn +gst_rtp_mp4g_pay_handle_buffer (GstBaseRTPPayload * basepayload, + GstBuffer * buffer) +{ + GstRtpMP4GPay *rtpmp4gpay; + GstFlowReturn ret; + + ret = GST_FLOW_OK; + + rtpmp4gpay = GST_RTP_MP4G_PAY (basepayload); + + rtpmp4gpay->first_ts = GST_BUFFER_TIMESTAMP (buffer); + + /* we always encode and flush a full AU */ + gst_adapter_push (rtpmp4gpay->adapter, buffer); + ret = gst_rtp_mp4g_pay_flush (rtpmp4gpay); + + return ret; +} + +static void +gst_rtp_mp4g_pay_set_property (GObject * object, guint prop_id, + const GValue * value, GParamSpec * pspec) +{ + GstRtpMP4GPay *rtpmp4gpay; + + rtpmp4gpay = GST_RTP_MP4G_PAY (object); + + switch (prop_id) { + default: + break; + } +} + +static void +gst_rtp_mp4g_pay_get_property (GObject * object, guint prop_id, + GValue * value, GParamSpec * pspec) +{ + GstRtpMP4GPay *rtpmp4gpay; + + rtpmp4gpay = GST_RTP_MP4G_PAY (object); + + switch (prop_id) { + default: + break; + } +} + +gboolean +gst_rtp_mp4g_pay_plugin_init (GstPlugin * plugin) +{ + return gst_element_register (plugin, "rtpmp4gpay", + GST_RANK_NONE, GST_TYPE_RTP_MP4G_PAY); +} |