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gst/rtp/gstrtph263ppay.*: Add new fragmentation mode base on GOB headers. Fixes #438940.

Browse source 
Original commit message from CVS:
Patch by: Antoine Tremblay <hexa00 at gmail dot com>
* gst/rtp/gstrtph263ppay.c: (gst_fragmentation_mode_get_type),
(gst_rtp_h263p_pay_class_init), (gst_rtp_h263p_pay_init),
(gst_rtp_h263p_pay_set_property), (gst_rtp_h263p_pay_get_property),
(gst_rtp_h263p_pay_flush):
* gst/rtp/gstrtph263ppay.h:
Add new fragmentation mode base on GOB headers. Fixes #438940.
This commit is contained in:
Antoine Tremblay 2007-05-21 08:57:18 +00:00 committed by Wim Taymans
parent d6a28f9ea1
commit 0ff05f8195
3 changed files with 150 additions and 11 deletions
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11
ChangeLog
View file

@ -1,3 +1,14 @@
2007-05-21 Wim Taymans <wim@fluendo.com>
Patch by: Antoine Tremblay <hexa00 at gmail dot com>
* gst/rtp/gstrtph263ppay.c: (gst_fragmentation_mode_get_type),
(gst_rtp_h263p_pay_class_init), (gst_rtp_h263p_pay_init),
(gst_rtp_h263p_pay_set_property), (gst_rtp_h263p_pay_get_property),
(gst_rtp_h263p_pay_flush):
* gst/rtp/gstrtph263ppay.h:
Add new fragmentation mode base on GOB headers. Fixes #438940.
2007-05-20 Tim-Philipp Müller <tim at centricular dot net>
* gst/rtsp/gstrtspsrc.c: (gst_rtspsrc_loop_udp):

137
gst/rtp/gstrtph263ppay.c
View file

@ -27,6 +27,36 @@
#include "gstrtph263ppay.h"
#define DEFAULT_FRAGMENTATION_MODE GST_FRAGMENTATION_MODE_NORMAL
enum
{
PROP_0,
PROP_FRAGMENTATION_MODE
};
#define GST_TYPE_FRAGMENTATION_MODE (gst_fragmentation_mode_get_type())
static GType
gst_fragmentation_mode_get_type (void)
{
static GType fragmentation_mode_type = 0;
static const GFlagsValue fragmentation_mode[] = {
{GST_FRAGMENTATION_MODE_NORMAL, "Normal", "normal"},
{GST_FRAGMENTATION_MODE_SYNC, "Fragment at sync points", "sync"},
{0, NULL, NULL},
};
if (!fragmentation_mode_type) {
fragmentation_mode_type =
g_flags_register_static ("GstFragmentationMode", fragmentation_mode);
}
return fragmentation_mode_type;
}
GST_DEBUG_CATEGORY_STATIC (rtph263ppay_debug);
#define GST_CAT_DEFAULT rtph263ppay_debug
/* elementfactory information */
static const GstElementDetails gst_rtp_h263ppay_details =
GST_ELEMENT_DETAILS ("RTP packet payloader",
@ -57,6 +87,12 @@ static void gst_rtp_h263p_pay_base_init (GstRtpH263PPayClass * klass);
static void gst_rtp_h263p_pay_init (GstRtpH263PPay * rtph263ppay);
static void gst_rtp_h263p_pay_finalize (GObject * object);
static void gst_rtp_h263p_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_rtp_h263p_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static gboolean gst_rtp_h263p_pay_setcaps (GstBaseRTPPayload * payload,
GstCaps * caps);
static GstFlowReturn gst_rtp_h263p_pay_handle_buffer (GstBaseRTPPayload *
@ -116,15 +152,29 @@ gst_rtp_h263p_pay_class_init (GstRtpH263PPayClass * klass)
parent_class = g_type_class_peek_parent (klass);
gobject_class->finalize = gst_rtp_h263p_pay_finalize;
gobject_class->set_property = gst_rtp_h263p_pay_set_property;
gobject_class->get_property = gst_rtp_h263p_pay_get_property;
gstbasertppayload_class->set_caps = gst_rtp_h263p_pay_setcaps;
gstbasertppayload_class->handle_buffer = gst_rtp_h263p_pay_handle_buffer;
g_object_class_install_property (G_OBJECT_CLASS (klass),
PROP_FRAGMENTATION_MODE, g_param_spec_enum ("fragmentation-mode",
"Fragmentation Mode",
"Packet Fragmentation Mode", GST_TYPE_FRAGMENTATION_MODE,
DEFAULT_FRAGMENTATION_MODE, G_PARAM_READWRITE));
GST_DEBUG_CATEGORY_INIT (rtph263ppay_debug, "rtph263ppay",
0, "rtph263ppay (RFC 2429)");
}
static void
gst_rtp_h263p_pay_init (GstRtpH263PPay * rtph263ppay)
{
rtph263ppay->adapter = gst_adapter_new ();
rtph263ppay->fragmentation_mode = DEFAULT_FRAGMENTATION_MODE;
}
static void
@ -149,6 +199,43 @@ gst_rtp_h263p_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
return TRUE;
}
static void
gst_rtp_h263p_pay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstRtpH263PPay *rtph263ppay;
rtph263ppay = GST_RTP_H263P_PAY (object);
switch (prop_id) {
case PROP_FRAGMENTATION_MODE:
rtph263ppay->fragmentation_mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_rtp_h263p_pay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
GstRtpH263PPay *rtph263ppay;
rtph263ppay = GST_RTP_H263P_PAY (object);
switch (prop_id) {
case PROP_FRAGMENTATION_MODE:
g_value_set_enum (value, rtph263ppay->fragmentation_mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static GstFlowReturn
gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
@ -163,29 +250,62 @@ gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
return GST_FLOW_OK;
fragmented = FALSE;
/* This algorithm assumes the H263+ encoder sends complete frames in each
* buffer */
/* This algorithm implements the Follow-on packets method for packetization.
* This assumes low packet loss network. A more resilient method would be to
* separate large frames at synchronisation points (Segments) (See RFC 2429
* section 6). It would be interesting to have a property such as network
* quality to select between both packetization methods */
/* With Fragmentation Mode at GST_FRAGMENTATION_MODE_NORMAL:
* This algorithm implements the Follow-on packets method for packetization.
* This assumes low packet loss network.
* With Fragmentation Mode at GST_FRAGMENTATION_MODE_SYNC:
* This algorithm separates large frames at synchronisation points (Segments)
* (See RFC 2429 section 6). It would be interesting to have a property such as network
* quality to select between both packetization methods */
/* TODO Add VRC supprt (See RFC 2429 section 4.2) */
while (avail > 0) {
guint towrite;
guint8 *payload;
guint8 *data;
guint payload_len;
gint header_len;
guint next_gop = 0;
gboolean found_gob = FALSE;
if (rtph263ppay->fragmentation_mode == GST_FRAGMENTATION_MODE_SYNC) {
/* start after 1st gop possible */
guint parsed_len = 3;
const guint8 *parse_data = NULL;
parse_data = gst_adapter_peek (rtph263ppay->adapter, avail);
/* Check if we have a gob or eos , eossbs */
if (avail >= 3 && *parse_data == 0 && *(parse_data + 1) == 0
&& *(parse_data + 2) >= 0x80) {
GST_DEBUG_OBJECT (rtph263ppay, " Found GOB header");
found_gob = TRUE;
}
/* Find next and cut the packet accordingly */
while (parsed_len + 2 < avail) {
if (parse_data[parsed_len] == 0 && parse_data[parsed_len + 1] == 0
&& parse_data[parsed_len + 2] >= 0x80) {
next_gop = parsed_len;
GST_DEBUG_OBJECT (rtph263ppay, " Next GOB Detected at : %d",
next_gop);
break;
}
parsed_len++;
}
}
/* for picture start frames (non-fragmented), we need to remove the first
* two 0x00 bytes and set P=1 */
header_len = (fragmented ? 2 : 0);
header_len = (fragmented && !found_gob) ? 2 : 0;
towrite = MIN (avail, gst_rtp_buffer_calc_payload_len
(GST_BASE_RTP_PAYLOAD_MTU (rtph263ppay) - header_len, 0, 0));
if (next_gop > 0)
towrite = MIN (next_gop, towrite);
payload_len = header_len + towrite;
outbuf = gst_rtp_buffer_new_allocate (payload_len, 0, 0);
@ -203,7 +323,8 @@ gst_rtp_h263p_pay_flush (GstRtpH263PPay * rtph263ppay)
* | RR |P|V| PLEN |PEBIT|
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
payload[0] = fragmented ? 0x00 : 0x04;
/* if fragmented or gop header , write p bit =1 */
payload[0] = (fragmented && !found_gob) ? 0x00 : 0x04;
payload[1] = 0;
GST_BUFFER_TIMESTAMP (outbuf) = rtph263ppay->first_ts;

13
gst/rtp/gstrtph263ppay.h
View file

@ -40,12 +40,19 @@ G_BEGIN_DECLS
typedef struct _GstRtpH263PPay GstRtpH263PPay;
typedef struct _GstRtpH263PPayClass GstRtpH263PPayClass;
typedef enum
{
GST_FRAGMENTATION_MODE_NORMAL = 0,
GST_FRAGMENTATION_MODE_SYNC = 1
} GstFragmentationMode;
struct _GstRtpH263PPay
{
GstBaseRTPPayload payload;
GstBaseRTPPayload payload;
GstAdapter *adapter;
GstClockTime first_ts;
GstAdapter *adapter;
GstClockTime first_ts;
GstFragmentationMode fragmentation_mode;
};
struct _GstRtpH263PPayClass