mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-04 23:46:43 +00:00
4e1ff0164f
Original commit message from CVS: Patch by: Olivier Crete <tester at tester dot ca> * gst/rtp/gstrtptheoradepay.c: (gst_rtp_theora_depay_setcaps): * gst/rtp/gstrtptheorapay.c: Fix the clock rate to 90000 as required by the RFC. Fixes #508644.
660 lines
20 KiB
C
660 lines
20 KiB
C
/* 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 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 "fnv1hash.h"
|
|
#include "gstrtptheorapay.h"
|
|
|
|
#define THEORA_ID_LEN 42
|
|
|
|
GST_DEBUG_CATEGORY_STATIC (rtptheorapay_debug);
|
|
#define GST_CAT_DEFAULT (rtptheorapay_debug)
|
|
|
|
/* references:
|
|
* http://svn.xiph.org/trunk/theora/doc/draft-ietf-avt-rtp-theora-01.txt
|
|
*/
|
|
|
|
/* elementfactory information */
|
|
static const GstElementDetails gst_rtp_theorapay_details =
|
|
GST_ELEMENT_DETAILS ("RTP packet depayloader",
|
|
"Codec/Payloader/Network",
|
|
"Payload-encode Theora video into RTP packets (draft-01 RFC XXXX)",
|
|
"Wim Taymans <wim@fluendo.com>");
|
|
|
|
static GstStaticPadTemplate gst_rtp_theora_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) \"THEORA\""
|
|
/* All required parameters
|
|
*
|
|
* "sampling = (string) { "YCbCr-4:2:0", "YCbCr-4:2:2", "YCbCr-4:4:4" } "
|
|
* "width = (string) [1, 1048561] (multiples of 16) "
|
|
* "height = (string) [1, 1048561] (multiples of 16) "
|
|
* "delivery-method = (string) { inline, in_band, out_band/<specific_name> } "
|
|
* "configuration = (string) ANY"
|
|
*/
|
|
/* All optional parameters
|
|
*
|
|
* "configuration-uri ="
|
|
*/
|
|
)
|
|
);
|
|
|
|
static GstStaticPadTemplate gst_rtp_theora_pay_sink_template =
|
|
GST_STATIC_PAD_TEMPLATE ("sink",
|
|
GST_PAD_SINK,
|
|
GST_PAD_ALWAYS,
|
|
GST_STATIC_CAPS ("video/x-theora")
|
|
);
|
|
|
|
GST_BOILERPLATE (GstRtpTheoraPay, gst_rtp_theora_pay, GstBaseRTPPayload,
|
|
GST_TYPE_BASE_RTP_PAYLOAD);
|
|
|
|
static gboolean gst_rtp_theora_pay_setcaps (GstBaseRTPPayload * basepayload,
|
|
GstCaps * caps);
|
|
static GstFlowReturn gst_rtp_theora_pay_handle_buffer (GstBaseRTPPayload * pad,
|
|
GstBuffer * buffer);
|
|
|
|
static void
|
|
gst_rtp_theora_pay_base_init (gpointer klass)
|
|
{
|
|
GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
|
|
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&gst_rtp_theora_pay_src_template));
|
|
gst_element_class_add_pad_template (element_class,
|
|
gst_static_pad_template_get (&gst_rtp_theora_pay_sink_template));
|
|
|
|
gst_element_class_set_details (element_class, &gst_rtp_theorapay_details);
|
|
}
|
|
|
|
static void
|
|
gst_rtp_theora_pay_class_init (GstRtpTheoraPayClass * 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_peek_parent (klass);
|
|
|
|
gstbasertppayload_class->set_caps = gst_rtp_theora_pay_setcaps;
|
|
gstbasertppayload_class->handle_buffer = gst_rtp_theora_pay_handle_buffer;
|
|
|
|
GST_DEBUG_CATEGORY_INIT (rtptheorapay_debug, "rtptheorapay", 0,
|
|
"Theora RTP Payloader");
|
|
}
|
|
|
|
static void
|
|
gst_rtp_theora_pay_init (GstRtpTheoraPay * rtptheorapay,
|
|
GstRtpTheoraPayClass * klass)
|
|
{
|
|
/* needed because of GST_BOILERPLATE */
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_theora_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
|
|
{
|
|
GstRtpTheoraPay *rtptheorapay;
|
|
|
|
rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
|
|
|
|
rtptheorapay->need_headers = TRUE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_theora_pay_reset_packet (GstRtpTheoraPay * rtptheorapay, guint8 TDT)
|
|
{
|
|
guint payload_len;
|
|
|
|
GST_DEBUG_OBJECT (rtptheorapay, "reset packet");
|
|
|
|
rtptheorapay->payload_pos = 4;
|
|
payload_len = gst_rtp_buffer_get_payload_len (rtptheorapay->packet);
|
|
rtptheorapay->payload_left = payload_len - 4;
|
|
rtptheorapay->payload_duration = 0;
|
|
rtptheorapay->payload_F = 0;
|
|
rtptheorapay->payload_TDT = TDT;
|
|
rtptheorapay->payload_pkts = 0;
|
|
}
|
|
|
|
static void
|
|
gst_rtp_theora_pay_init_packet (GstRtpTheoraPay * rtptheorapay, guint8 TDT,
|
|
GstClockTime timestamp)
|
|
{
|
|
GST_DEBUG_OBJECT (rtptheorapay, "starting new packet, TDT: %d", TDT);
|
|
|
|
if (rtptheorapay->packet)
|
|
gst_buffer_unref (rtptheorapay->packet);
|
|
|
|
/* new packet allocate max packet size */
|
|
rtptheorapay->packet =
|
|
gst_rtp_buffer_new_allocate_len (GST_BASE_RTP_PAYLOAD_MTU
|
|
(rtptheorapay), 0, 0);
|
|
gst_rtp_theora_pay_reset_packet (rtptheorapay, TDT);
|
|
|
|
GST_BUFFER_TIMESTAMP (rtptheorapay->packet) = timestamp;
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_theora_pay_flush_packet (GstRtpTheoraPay * rtptheorapay)
|
|
{
|
|
GstFlowReturn ret;
|
|
guint8 *payload;
|
|
guint hlen;
|
|
|
|
/* check for empty packet */
|
|
if (!rtptheorapay->packet || rtptheorapay->payload_pos <= 4)
|
|
return GST_FLOW_OK;
|
|
|
|
GST_DEBUG_OBJECT (rtptheorapay, "flushing packet");
|
|
|
|
/* fix header */
|
|
payload = gst_rtp_buffer_get_payload (rtptheorapay->packet);
|
|
/*
|
|
* 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
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Ident | F |TDT|# pkts.|
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*
|
|
* F: Fragment type (0=none, 1=start, 2=cont, 3=end)
|
|
* TDT: Theora data type (0=theora, 1=config, 2=comment, 3=reserved)
|
|
* pkts: number of packets.
|
|
*/
|
|
payload[0] = (rtptheorapay->payload_ident >> 16) & 0xff;
|
|
payload[1] = (rtptheorapay->payload_ident >> 8) & 0xff;
|
|
payload[2] = (rtptheorapay->payload_ident) & 0xff;
|
|
payload[3] = (rtptheorapay->payload_F & 0x3) << 6 |
|
|
(rtptheorapay->payload_TDT & 0x3) << 4 |
|
|
(rtptheorapay->payload_pkts & 0xf);
|
|
|
|
/* shrink the buffer size to the last written byte */
|
|
hlen = gst_rtp_buffer_calc_header_len (0);
|
|
GST_BUFFER_SIZE (rtptheorapay->packet) = hlen + rtptheorapay->payload_pos;
|
|
|
|
GST_BUFFER_DURATION (rtptheorapay->packet) = rtptheorapay->payload_duration;
|
|
|
|
/* push, this gives away our ref to the packet, so clear it. */
|
|
ret =
|
|
gst_basertppayload_push (GST_BASE_RTP_PAYLOAD (rtptheorapay),
|
|
rtptheorapay->packet);
|
|
rtptheorapay->packet = NULL;
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gchar *
|
|
encode_base64 (const guint8 * in, guint size, guint * len)
|
|
{
|
|
gchar *ret, *d;
|
|
static const gchar *v =
|
|
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
|
|
|
|
*len = ((size + 2) / 3) * 4;
|
|
d = ret = (gchar *) g_malloc (*len + 1);
|
|
for (; size; in += 3) { /* process tuplets */
|
|
*d++ = v[in[0] >> 2]; /* byte 1: high 6 bits (1) */
|
|
/* byte 2: low 2 bits (1), high 4 bits (2) */
|
|
*d++ = v[((in[0] << 4) + (--size ? (in[1] >> 4) : 0)) & 0x3f];
|
|
/* byte 3: low 4 bits (2), high 2 bits (3) */
|
|
*d++ = size ? v[((in[1] << 2) + (--size ? (in[2] >> 6) : 0)) & 0x3f] : '=';
|
|
/* byte 4: low 6 bits (3) */
|
|
*d++ = size ? v[in[2] & 0x3f] : '=';
|
|
if (size)
|
|
size--; /* count third character if processed */
|
|
}
|
|
*d = '\0'; /* tie off string */
|
|
|
|
return ret; /* return the resulting string */
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_theora_pay_finish_headers (GstBaseRTPPayload * basepayload)
|
|
{
|
|
GstRtpTheoraPay *rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
|
|
GList *walk;
|
|
guint length, size, n_headers, configlen;
|
|
gchar *wstr, *hstr, *configuration;
|
|
guint8 *data, *config;
|
|
guint32 ident;
|
|
|
|
GST_DEBUG_OBJECT (rtptheorapay, "finish headers");
|
|
|
|
if (!rtptheorapay->headers)
|
|
goto no_headers;
|
|
|
|
/* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Number of packed headers |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Packed header |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Packed header |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | .... |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*
|
|
* We only construct a config containing 1 packed header like this:
|
|
*
|
|
* 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
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Ident | length ..
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .. | n. of headers | length1 | length2 ..
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .. | Identification Header ..
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .................................................................
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .. | Comment Header ..
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .................................................................
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .. Comment Header |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* | Setup Header ..
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .................................................................
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
* .. Setup Header |
|
|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
|
|
*/
|
|
|
|
/* we need 4 bytes for the number of headers (which is always 1), 3 bytes for
|
|
* the ident, 2 bytes for length, 1 byte for n. of headers. */
|
|
size = 4 + 3 + 2 + 1;
|
|
|
|
/* count the size of the headers first and update the hash */
|
|
length = 0;
|
|
n_headers = 0;
|
|
ident = fnv1_hash_32_new ();
|
|
for (walk = rtptheorapay->headers; walk; walk = g_list_next (walk)) {
|
|
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
|
|
guint bsize;
|
|
|
|
bsize = GST_BUFFER_SIZE (buf);
|
|
length += bsize;
|
|
n_headers++;
|
|
|
|
/* count number of bytes needed for length fields, we don't need this for
|
|
* the last header. */
|
|
if (g_list_next (walk)) {
|
|
do {
|
|
size++;
|
|
bsize >>= 7;
|
|
} while (bsize);
|
|
}
|
|
/* update hash */
|
|
ident = fnv1_hash_32_update (ident, GST_BUFFER_DATA (buf),
|
|
GST_BUFFER_SIZE (buf));
|
|
}
|
|
|
|
/* packet length is header size + packet length */
|
|
configlen = size + length;
|
|
config = data = g_malloc (configlen);
|
|
|
|
/* number of packed headers, we only pack 1 header */
|
|
data[0] = 0;
|
|
data[1] = 0;
|
|
data[2] = 0;
|
|
data[3] = 1;
|
|
|
|
ident = fnv1_hash_32_to_24 (ident);
|
|
rtptheorapay->payload_ident = ident;
|
|
GST_DEBUG_OBJECT (rtptheorapay, "ident 0x%08x", ident);
|
|
|
|
/* take lower 3 bytes */
|
|
data[4] = (ident >> 16) & 0xff;
|
|
data[5] = (ident >> 8) & 0xff;
|
|
data[6] = ident & 0xff;
|
|
|
|
/* store length of all theora headers */
|
|
data[7] = ((length) >> 8) & 0xff;
|
|
data[8] = (length) & 0xff;
|
|
|
|
/* store number of headers minus one. */
|
|
data[9] = n_headers - 1;
|
|
data += 10;
|
|
|
|
/* store length for each header */
|
|
for (walk = rtptheorapay->headers; walk; walk = g_list_next (walk)) {
|
|
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
|
|
guint bsize, size, temp;
|
|
|
|
/* only need to store the length when it's not the last header */
|
|
if (!g_list_next (walk))
|
|
break;
|
|
|
|
bsize = GST_BUFFER_SIZE (buf);
|
|
|
|
/* calc size */
|
|
size = 0;
|
|
do {
|
|
size++;
|
|
bsize >>= 7;
|
|
} while (bsize);
|
|
temp = size;
|
|
|
|
bsize = GST_BUFFER_SIZE (buf);
|
|
/* write the size backwards */
|
|
while (size) {
|
|
size--;
|
|
data[size] = bsize & 0x7f;
|
|
bsize >>= 7;
|
|
}
|
|
data += temp;
|
|
}
|
|
|
|
/* copy header data */
|
|
for (walk = rtptheorapay->headers; walk; walk = g_list_next (walk)) {
|
|
GstBuffer *buf = GST_BUFFER_CAST (walk->data);
|
|
|
|
memcpy (data, GST_BUFFER_DATA (buf), GST_BUFFER_SIZE (buf));
|
|
data += GST_BUFFER_SIZE (buf);
|
|
}
|
|
|
|
/* serialize to base64 */
|
|
configuration = encode_base64 (config, configlen, &size);
|
|
g_free (config);
|
|
|
|
/* configure payloader settings */
|
|
wstr = g_strdup_printf ("%d", rtptheorapay->width);
|
|
hstr = g_strdup_printf ("%d", rtptheorapay->height);
|
|
gst_basertppayload_set_options (basepayload, "video", TRUE, "THEORA", 90000);
|
|
gst_basertppayload_set_outcaps (basepayload,
|
|
"sampling", G_TYPE_STRING, "YCbCr-4:2:0",
|
|
"width", G_TYPE_STRING, wstr,
|
|
"height", G_TYPE_STRING, hstr,
|
|
"configuration", G_TYPE_STRING, configuration,
|
|
"delivery-method", G_TYPE_STRING, "inline",
|
|
/* don't set the other defaults
|
|
*/
|
|
NULL);
|
|
g_free (wstr);
|
|
g_free (hstr);
|
|
g_free (configuration);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
no_headers:
|
|
{
|
|
GST_DEBUG_OBJECT (rtptheorapay, "finish headers");
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static gboolean
|
|
gst_rtp_theora_pay_parse_id (GstBaseRTPPayload * basepayload, guint8 * data,
|
|
guint size)
|
|
{
|
|
GstRtpTheoraPay *rtptheorapay;
|
|
gint width, height;
|
|
|
|
rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
|
|
|
|
if (G_UNLIKELY (size < 42))
|
|
goto too_short;
|
|
|
|
if (G_UNLIKELY (memcmp (data, "\200theora", 7)))
|
|
goto invalid_start;
|
|
data += 7;
|
|
|
|
if (G_UNLIKELY (data[0] != 3))
|
|
goto invalid_version;
|
|
if (G_UNLIKELY (data[1] != 2))
|
|
goto invalid_version;
|
|
data += 3;
|
|
|
|
width = GST_READ_UINT16_BE (data) << 4;
|
|
data += 2;
|
|
height = GST_READ_UINT16_BE (data) << 4;
|
|
data += 2;
|
|
|
|
/* FIXME, parse pixel format */
|
|
|
|
/* store values */
|
|
rtptheorapay->width = width;
|
|
rtptheorapay->height = height;
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
too_short:
|
|
{
|
|
GST_ELEMENT_ERROR (basepayload, STREAM, DECODE,
|
|
(NULL),
|
|
("Identification packet is too short, need at least 42, got %d", size));
|
|
return FALSE;
|
|
}
|
|
invalid_start:
|
|
{
|
|
GST_ELEMENT_ERROR (basepayload, STREAM, DECODE,
|
|
(NULL), ("Invalid header start in identification packet"));
|
|
return FALSE;
|
|
}
|
|
invalid_version:
|
|
{
|
|
GST_ELEMENT_ERROR (basepayload, STREAM, DECODE,
|
|
(NULL), ("Invalid version"));
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static GstFlowReturn
|
|
gst_rtp_theora_pay_handle_buffer (GstBaseRTPPayload * basepayload,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstRtpTheoraPay *rtptheorapay;
|
|
GstFlowReturn ret;
|
|
guint size, newsize;
|
|
guint8 *data;
|
|
guint packet_len;
|
|
GstClockTime duration, newduration, timestamp;
|
|
gboolean flush;
|
|
guint8 TDT;
|
|
guint plen;
|
|
guint8 *ppos, *payload;
|
|
gboolean fragmented;
|
|
|
|
rtptheorapay = GST_RTP_THEORA_PAY (basepayload);
|
|
|
|
size = GST_BUFFER_SIZE (buffer);
|
|
data = GST_BUFFER_DATA (buffer);
|
|
duration = GST_BUFFER_DURATION (buffer);
|
|
timestamp = GST_BUFFER_TIMESTAMP (buffer);
|
|
|
|
GST_DEBUG_OBJECT (rtptheorapay, "size %u, duration %" GST_TIME_FORMAT,
|
|
size, GST_TIME_ARGS (duration));
|
|
|
|
if (G_UNLIKELY (size < 1 || size > 0xffff))
|
|
goto wrong_size;
|
|
|
|
/* find packet type */
|
|
if (data[0] & 0x80) {
|
|
/* header */
|
|
if (data[0] == 0x80) {
|
|
/* identification, we need to parse this in order to get the clock rate.
|
|
*/
|
|
if (G_UNLIKELY (!gst_rtp_theora_pay_parse_id (basepayload, data, size)))
|
|
goto parse_id_failed;
|
|
TDT = 1;
|
|
} else if (data[0] == 0x81) {
|
|
/* comment */
|
|
TDT = 2;
|
|
} else if (data[0] == 0x82) {
|
|
/* setup */
|
|
TDT = 1;
|
|
} else
|
|
goto unknown_header;
|
|
} else
|
|
/* data */
|
|
TDT = 0;
|
|
|
|
if (rtptheorapay->need_headers) {
|
|
/* we need to collect the headers and construct a config string from them */
|
|
if (TDT != 0) {
|
|
GST_DEBUG_OBJECT (rtptheorapay, "collecting header, buffer %p", buffer);
|
|
/* append header to the list of headers */
|
|
rtptheorapay->headers = g_list_append (rtptheorapay->headers, buffer);
|
|
ret = GST_FLOW_OK;
|
|
goto done;
|
|
} else {
|
|
if (!gst_rtp_theora_pay_finish_headers (basepayload))
|
|
goto header_error;
|
|
rtptheorapay->need_headers = FALSE;
|
|
}
|
|
}
|
|
|
|
/* size increases with packet length and 2 bytes size eader. */
|
|
newduration = rtptheorapay->payload_duration;
|
|
if (duration != GST_CLOCK_TIME_NONE)
|
|
newduration += duration;
|
|
|
|
newsize = rtptheorapay->payload_pos + 2 + size;
|
|
packet_len = gst_rtp_buffer_calc_packet_len (newsize, 0, 0);
|
|
|
|
/* check buffer filled against length and max latency */
|
|
flush = gst_basertppayload_is_filled (basepayload, packet_len, newduration);
|
|
/* we can store up to 15 theora packets in one RTP packet. */
|
|
flush |= (rtptheorapay->payload_pkts == 15);
|
|
/* flush if we have a new TDT */
|
|
if (rtptheorapay->packet)
|
|
flush |= (rtptheorapay->payload_TDT != TDT);
|
|
if (flush)
|
|
ret = gst_rtp_theora_pay_flush_packet (rtptheorapay);
|
|
|
|
/* create new packet if we must */
|
|
if (!rtptheorapay->packet) {
|
|
gst_rtp_theora_pay_init_packet (rtptheorapay, TDT, timestamp);
|
|
}
|
|
|
|
payload = gst_rtp_buffer_get_payload (rtptheorapay->packet);
|
|
ppos = payload + rtptheorapay->payload_pos;
|
|
fragmented = FALSE;
|
|
|
|
ret = GST_FLOW_OK;
|
|
|
|
/* put buffer in packet, it either fits completely or needs to be fragmented
|
|
* over multiple RTP packets. */
|
|
while (size) {
|
|
plen = MIN (rtptheorapay->payload_left - 2, size);
|
|
|
|
GST_DEBUG_OBJECT (rtptheorapay, "append %u bytes", plen);
|
|
|
|
/* data is copied in the payload with a 2 byte length header */
|
|
ppos[0] = (plen >> 8) & 0xff;
|
|
ppos[1] = (plen & 0xff);
|
|
memcpy (&ppos[2], data, plen);
|
|
|
|
size -= plen;
|
|
data += plen;
|
|
|
|
rtptheorapay->payload_pos += plen + 2;
|
|
rtptheorapay->payload_left -= plen + 2;
|
|
|
|
if (fragmented) {
|
|
if (size == 0)
|
|
/* last fragment, set F to 0x3. */
|
|
rtptheorapay->payload_F = 0x3;
|
|
else
|
|
/* fragment continues, set F to 0x2. */
|
|
rtptheorapay->payload_F = 0x2;
|
|
} else {
|
|
if (size > 0) {
|
|
/* fragmented packet starts, set F to 0x1, mark ourselves as
|
|
* fragmented. */
|
|
rtptheorapay->payload_F = 0x1;
|
|
fragmented = TRUE;
|
|
}
|
|
}
|
|
if (fragmented) {
|
|
/* fragmented packets are always flushed and have ptks of 0 */
|
|
rtptheorapay->payload_pkts = 0;
|
|
ret = gst_rtp_theora_pay_flush_packet (rtptheorapay);
|
|
|
|
if (size > 0) {
|
|
/* start new packet and get pointers. TDT stays the same. */
|
|
gst_rtp_theora_pay_init_packet (rtptheorapay,
|
|
rtptheorapay->payload_TDT, timestamp);
|
|
payload = gst_rtp_buffer_get_payload (rtptheorapay->packet);
|
|
ppos = payload + rtptheorapay->payload_pos;
|
|
}
|
|
} else {
|
|
/* unfragmented packet, update stats for next packet, size == 0 and we
|
|
* exit the while loop */
|
|
rtptheorapay->payload_pkts++;
|
|
if (duration != GST_CLOCK_TIME_NONE)
|
|
rtptheorapay->payload_duration += duration;
|
|
}
|
|
}
|
|
done:
|
|
return ret;
|
|
|
|
/* ERRORS */
|
|
wrong_size:
|
|
{
|
|
GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
|
|
("Invalid packet size (1 < %d <= 0xffff)", size), (NULL));
|
|
return GST_FLOW_OK;
|
|
}
|
|
parse_id_failed:
|
|
{
|
|
return GST_FLOW_ERROR;
|
|
}
|
|
unknown_header:
|
|
{
|
|
GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
|
|
(NULL), ("Ignoring unknown header received"));
|
|
return GST_FLOW_OK;
|
|
}
|
|
header_error:
|
|
{
|
|
GST_ELEMENT_WARNING (rtptheorapay, STREAM, DECODE,
|
|
(NULL), ("Error initializing header config"));
|
|
return GST_FLOW_OK;
|
|
}
|
|
}
|
|
|
|
gboolean
|
|
gst_rtp_theora_pay_plugin_init (GstPlugin * plugin)
|
|
{
|
|
return gst_element_register (plugin, "rtptheorapay",
|
|
GST_RANK_NONE, GST_TYPE_RTP_THEORA_PAY);
|
|
}
|