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gst/rtp/: Add DV pay and depayloaders. Fixes #532423.

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Original commit message from CVS:
Based on patch by: Olivier Crete <tester at tester dot ca>
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpdvdepay.c: (gst_rtp_dv_depay_base_init),
(gst_rtp_dv_depay_class_init), (gst_rtp_dv_depay_init),
(parse_encode), (gst_rtp_dv_depay_setcaps),
(calculate_difblock_location), (gst_rtp_dv_depay_process),
(gst_rtp_dv_depay_reset), (gst_rtp_dv_depay_change_state),
(gst_rtp_dv_depay_plugin_init):
* gst/rtp/gstrtpdvdepay.h:
* gst/rtp/gstrtpdvpay.c: (gst_dv_pay_mode_get_type),
(gst_rtp_dv_pay_base_init), (gst_rtp_dv_pay_class_init),
(gst_rtp_dv_pay_init), (gst_dv_pay_set_property),
(gst_dv_pay_get_property), (gst_rtp_dv_pay_setcaps),
(gst_dv_pay_negotiate), (include_dif),
(gst_rtp_dv_pay_handle_buffer), (gst_rtp_dv_pay_plugin_init):
* gst/rtp/gstrtpdvpay.h:
Add DV pay and depayloaders. Fixes #532423.
This commit is contained in:
Olivier Crete 2008-05-12 18:27:24 +00:00 committed by Wim Taymans
parent 10f7a99f1a
commit 894206be3d
7 changed files with 973 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

22
ChangeLog
View file

@ -1,3 +1,25 @@
2008-05-12 Wim Taymans <wim.taymans@collabora.co.uk>
Based on patch by: Olivier Crete <tester at tester dot ca>
* gst/rtp/Makefile.am:
* gst/rtp/gstrtp.c: (plugin_init):
* gst/rtp/gstrtpdvdepay.c: (gst_rtp_dv_depay_base_init),
(gst_rtp_dv_depay_class_init), (gst_rtp_dv_depay_init),
(parse_encode), (gst_rtp_dv_depay_setcaps),
(calculate_difblock_location), (gst_rtp_dv_depay_process),
(gst_rtp_dv_depay_reset), (gst_rtp_dv_depay_change_state),
(gst_rtp_dv_depay_plugin_init):
* gst/rtp/gstrtpdvdepay.h:
* gst/rtp/gstrtpdvpay.c: (gst_dv_pay_mode_get_type),
(gst_rtp_dv_pay_base_init), (gst_rtp_dv_pay_class_init),
(gst_rtp_dv_pay_init), (gst_dv_pay_set_property),
(gst_dv_pay_get_property), (gst_rtp_dv_pay_setcaps),
(gst_dv_pay_negotiate), (include_dif),
(gst_rtp_dv_pay_handle_buffer), (gst_rtp_dv_pay_plugin_init):
* gst/rtp/gstrtpdvpay.h:
Add DV pay and depayloaders. Fixes #532423.
2008-05-12 Mark Nauwelaerts <mnauw@users.sf.net>
* gst/matroska/matroska-demux.c:

4
gst/rtp/Makefile.am
View file

@ -5,6 +5,8 @@ libgstrtp_la_SOURCES = \
gstrtp.c \
gstrtpdepay.c \
gstrtpac3depay.c \
gstrtpdvdepay.c \
gstrtpdvpay.c \
gstrtpilbcdepay.c \
gstrtpilbcpay.c \
gstrtpmpadepay.c \
@ -61,6 +63,8 @@ noinst_HEADERS = \
gstrtpL16depay.h \
gstrtpL16pay.h \
gstrtpac3depay.h \
gstrtpdvdepay.h \
gstrtpdvpay.h \
gstrtpamrdepay.h \
gstrtpamrpay.h \
gstrtpilbcdepay.h \

8
gst/rtp/gstrtp.c
View file

@ -23,6 +23,8 @@
#include "gstrtpdepay.h"
#include "gstrtpac3depay.h"
#include "gstrtpdvdepay.h"
#include "gstrtpdvpay.h"
#include "gstrtpilbcdepay.h"
#include "gstrtpilbcpay.h"
#include "gstrtppcmupay.h"
@ -70,6 +72,12 @@ plugin_init (GstPlugin * plugin)
if (!gst_rtp_ac3_depay_plugin_init (plugin))
return FALSE;
if (!gst_rtp_dv_depay_plugin_init (plugin))
return FALSE;
if (!gst_rtp_dv_pay_plugin_init (plugin))
return FALSE;
if (!gst_rtp_ilbc_pay_plugin_init (plugin))
return FALSE;

419
gst/rtp/gstrtpdvdepay.c Normal file
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@ -0,0 +1,419 @@
/* Farsight
* Copyright (C) 2006 Marcel Moreaux <marcelm@spacelabs.nl>
* (C) 2008 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/*
* RTP DV depayloader.
*
* Important note for NTSC-users:
*
* Because the author uses PAL video, and he does not have proper DV
* documentation (the DV format specification is not freely available),
* this code may very well contain PAL-specific assumptions.
*/
#include <stdlib.h>
#include <string.h>
#include <gst/gst.h>
#include "gstrtpdvdepay.h"
GST_DEBUG_CATEGORY (rtpdvdepay_debug);
#define GST_CAT_DEFAULT (rtpdvdepay_debug)
/* Filter signals and args */
enum
{
/* FILL ME */
LAST_SIGNAL
};
enum
{
ARG_0,
};
static GstStaticPadTemplate src_factory = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-dv")
);
static GstStaticPadTemplate sink_factory = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) { \"video\", \"audio\" },"
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"encoding-name = (string) \"DV\", "
"clock-rate = (int) 90000,"
"encode = (string) { \"SD-VCR/525-60\", \"SD-VCR/625-50\", \"HD-VCR/1125-60\","
"\"HD-VCR/1250-50\", \"SDL-VCR/525-60\", \"SDL-VCR/625-50\","
"\"306M/525-60\", \"306M/625-50\", \"314M-25/525-60\","
"\"314M-25/625-50\", \"314M-50/525-60\", \"314M-50/625-50\" }"
/* optional parameters can't go in the template
* "audio = (string) { \"bundled\", \"none\" }"
*/
)
);
static GstStateChangeReturn
gst_rtp_dv_depay_change_state (GstElement * element, GstStateChange transition);
static GstBuffer *gst_rtp_dv_depay_process (GstBaseRTPDepayload * base,
GstBuffer * in);
static gboolean gst_rtp_dv_depay_setcaps (GstBaseRTPDepayload * depayload,
GstCaps * caps);
GST_BOILERPLATE (GstRTPDVDepay, gst_rtp_dv_depay, GstBaseRTPDepayload,
GST_TYPE_BASE_RTP_DEPAYLOAD)
static void gst_rtp_dv_depay_base_init (gpointer g_class)
{
static GstElementDetails plugin_details = {
"RTP DV Depayloader",
"Codec/Depayloader/Network",
"Depayloads DV from RTP packets (RFC 3189)",
"Marcel Moreaux <marcelm@spacelabs.nl>, Wim Taymans <wim.taymans@gmail.com>"
};
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&src_factory));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&sink_factory));
gst_element_class_set_details (element_class, &plugin_details);
}
/* initialize the plugin's class */
static void
gst_rtp_dv_depay_class_init (GstRTPDVDepayClass * klass)
{
GstElementClass *gstelement_class = (GstElementClass *) klass;
GstBaseRTPDepayloadClass *gstbasertpdepayload_class =
(GstBaseRTPDepayloadClass *) klass;
gstbasertpdepayload_class = (GstBaseRTPDepayloadClass *) klass;
gstelement_class->change_state =
GST_DEBUG_FUNCPTR (gst_rtp_dv_depay_change_state);
gstbasertpdepayload_class->process =
GST_DEBUG_FUNCPTR (gst_rtp_dv_depay_process);
gstbasertpdepayload_class->set_caps =
GST_DEBUG_FUNCPTR (gst_rtp_dv_depay_setcaps);
GST_DEBUG_CATEGORY_INIT (rtpdvdepay_debug, "rtpdvdepay", 0,
"DV RTP Depayloader");
}
/* initialize the new element
* instantiate pads and add them to element
* set functions
* initialize structure
*/
static void
gst_rtp_dv_depay_init (GstRTPDVDepay * filter, GstRTPDVDepayClass * klass)
{
}
static gboolean
parse_encode (GstRTPDVDepay * rtpdvdepay, const gchar * encode)
{
rtpdvdepay->width = 720;
if (!strcmp (encode, "314M-25/525-60")) {
rtpdvdepay->frame_size = 240000;
rtpdvdepay->height = 480;
rtpdvdepay->rate_num = 30000;
rtpdvdepay->rate_denom = 1001;
} else if (!strcmp (encode, "SD-VCR/525-60")) {
rtpdvdepay->frame_size = 120000;
rtpdvdepay->height = 480;
rtpdvdepay->rate_num = 30000;
rtpdvdepay->rate_denom = 1001;
} else if (!strcmp (encode, "314M-50/625-50")) {
rtpdvdepay->frame_size = 288000;
rtpdvdepay->height = 576;
rtpdvdepay->rate_num = 25;
rtpdvdepay->rate_denom = 1;
} else if (!strcmp (encode, "SD-VCR/625-50")) {
rtpdvdepay->frame_size = 144000;
rtpdvdepay->height = 576;
rtpdvdepay->rate_num = 25;
rtpdvdepay->rate_denom = 1;
} else if (!strcmp (encode, "314M-25/625-50")) {
rtpdvdepay->frame_size = 144000;
rtpdvdepay->height = 576;
rtpdvdepay->rate_num = 25;
rtpdvdepay->rate_denom = 1;
} else
rtpdvdepay->frame_size = -1;
return rtpdvdepay->frame_size != -1;
}
static gboolean
gst_rtp_dv_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
{
GstStructure *structure;
GstRTPDVDepay *rtpdvdepay;
GstCaps *srccaps;
gint clock_rate = 90000; /* default */
gboolean systemstream, ret;
const gchar *encode, *media;
rtpdvdepay = GST_RTP_DV_DEPAY (depayload);
structure = gst_caps_get_structure (caps, 0);
if (gst_structure_has_field (structure, "clock-rate"))
gst_structure_get_int (structure, "clock-rate", &clock_rate);
/* we really need the encode property to figure out the frame size, it's also
* required by the spec */
if (!(encode = gst_structure_get_string (structure, "encode")))
goto no_encode;
/* figure out the size of one frame */
if (!parse_encode (rtpdvdepay, encode))
goto unknown_encode;
/* check the media, this tells us that the stream has video or not */
if (!(media = gst_structure_get_string (structure, "media")))
goto no_media;
systemstream = FALSE;
if (!strcmp (media, "audio")) {
/* we need a demuxer for audio only */
systemstream = TRUE;
} else if (!strcmp (media, "video")) {
const gchar *audio;
/* check the optional audio field, if it's present and set to bundled, we
* are dealing with a system stream. */
if ((audio = gst_structure_get_string (structure, "audio"))) {
if (!strcmp (audio, "bundled"))
systemstream = TRUE;
}
}
/* allocate accumulator */
rtpdvdepay->acc = gst_buffer_new_and_alloc (rtpdvdepay->frame_size);
/* Initialize the new accumulator frame.
* If the previous frame exists, copy that into the accumulator frame.
* This way, missing packets in the stream won't show up badly. */
memset (GST_BUFFER_DATA (rtpdvdepay->acc), 0, rtpdvdepay->frame_size);
srccaps = gst_caps_new_simple ("video/x-dv",
"systemstream", G_TYPE_BOOLEAN, systemstream,
"width", G_TYPE_INT, rtpdvdepay->width,
"height", G_TYPE_INT, rtpdvdepay->height,
"framerate", GST_TYPE_FRACTION, rtpdvdepay->rate_num,
rtpdvdepay->rate_denom, NULL);
ret = gst_pad_set_caps (depayload->srcpad, srccaps);
gst_caps_unref (srccaps);
depayload->clock_rate = clock_rate;
rtpdvdepay->negotiated = TRUE;
return ret;
/* ERRORS */
no_encode:
{
GST_ERROR_OBJECT (rtpdvdepay, "required encode property not found in caps");
return FALSE;
}
unknown_encode:
{
GST_ERROR_OBJECT (rtpdvdepay, "unknown encode property %s found", encode);
return FALSE;
}
no_media:
{
GST_ERROR_OBJECT (rtpdvdepay, "required media property not found in caps");
return FALSE;
}
}
/* A DV frame consists of a bunch of 80-byte DIF blocks.
* Each DIF block contains a 3-byte header telling where in the DV frame the
* DIF block should go. We use this information to calculate its position.
*/
static guint
calculate_difblock_location (guint8 * block)
{
gint block_type, dif_sequence, dif_block;
guint location;
block_type = block[0] >> 5;
dif_sequence = block[1] >> 4;
dif_block = block[2];
switch (block_type) {
case 0: /* Header block */
location = dif_sequence * 150 * 80;
break;
case 1: /* Subcode block */
location = dif_sequence * 150 * 80 + (1 + dif_block) * 80;
break;
case 2: /* VAUX block */
location = dif_sequence * 150 * 80 + (3 + dif_block) * 80;
break;
case 3: /* Audio block */
location = dif_sequence * 150 * 80 + (6 + dif_block * 16) * 80;
break;
case 4: /* Video block */
location = dif_sequence * 150 * 80 +
(7 + (dif_block / 15) + dif_block) * 80;
break;
default: /* Something bogus */
GST_DEBUG ("UNKNOWN BLOCK");
location = -1;
break;
}
return location;
}
/* Process one RTP packet. Accumulate RTP payload in the proper place in a DV
* frame, and return that frame if we detect a new frame, or NULL otherwise.
* We assume a DV frame is 144000 bytes. That should accomodate PAL as well as
* NTSC.
*/
static GstBuffer *
gst_rtp_dv_depay_process (GstBaseRTPDepayload * base, GstBuffer * in)
{
GstBuffer *out = NULL;
guint8 *payload;
guint32 rtp_ts;
guint payload_len, location;
GstRTPDVDepay *dvdepay = GST_RTP_DV_DEPAY (base);
gboolean marker;
if (!dvdepay->negotiated)
goto not_negotiated;
marker = gst_rtp_buffer_get_marker (in);
/* Check if the received packet contains (the start of) a new frame, we do
* this by checking the RTP timestamp. */
rtp_ts = gst_rtp_buffer_get_timestamp (in);
/* we cannot copy the packet yet if the marker is set, we will do that below
* after taking out the data */
if (dvdepay->prev_ts != -1 && rtp_ts != dvdepay->prev_ts && !marker) {
/* the timestamp changed */
GST_DEBUG_OBJECT (dvdepay, "new frame with ts %u, old ts %u", rtp_ts,
dvdepay->prev_ts);
/* return copy of accumulator. */
out = gst_buffer_copy (dvdepay->acc);
}
/* Extract the payload */
payload_len = gst_rtp_buffer_get_payload_len (in);
payload = gst_rtp_buffer_get_payload (in);
/* copy all DIF chunks in their place. */
while (payload_len >= 80) {
/* Calculate where in the frame the payload should go */
location = calculate_difblock_location (payload);
/* Check if we received a header. We will not pass on frames until
* we've received a header, otherwise the DV decoder goes wacko. */
if (location == 0)
dvdepay->have_header = TRUE;
/* And copy it in, provided the location is sane. */
if (location >= 0 && location <= dvdepay->frame_size - 80)
memcpy (GST_BUFFER_DATA (dvdepay->acc) + location, payload, 80);
payload += 80;
payload_len -= 80;
}
if (marker) {
/* The marker marks the end of a frame that we need to push. The next frame
* will change the timestamp but we won't copy the accumulator again because
* we set the prev_ts to -1. */
out = gst_buffer_copy (dvdepay->acc);
GST_DEBUG_OBJECT (dvdepay, "marker bit complete frame %u", rtp_ts);
dvdepay->prev_ts = -1;
} else {
/* save last timestamp */
dvdepay->prev_ts = rtp_ts;
}
return out;
/* ERRORS */
not_negotiated:
{
GST_ELEMENT_ERROR (dvdepay, STREAM, NOT_IMPLEMENTED,
(NULL), ("not negotiated"));
return NULL;
}
}
static void
gst_rtp_dv_depay_reset (GstRTPDVDepay * depay)
{
if (depay->acc)
gst_buffer_unref (depay->acc);
depay->acc = NULL;
depay->prev_ts = -1;
depay->have_header = FALSE;
depay->frame_nr = 0;
depay->negotiated = FALSE;
}
static GstStateChangeReturn
gst_rtp_dv_depay_change_state (GstElement * element, GstStateChange transition)
{
GstStateChangeReturn ret;
GstRTPDVDepay *depay = GST_RTP_DV_DEPAY (element);
switch (transition) {
case GST_STATE_CHANGE_READY_TO_PAUSED:
gst_rtp_dv_depay_reset (depay);
break;
default:
break;
}
ret = GST_CALL_PARENT_WITH_DEFAULT (GST_ELEMENT_CLASS, change_state,
(element, transition), GST_STATE_CHANGE_FAILURE);
switch (transition) {
case GST_STATE_CHANGE_PAUSED_TO_READY:
gst_rtp_dv_depay_reset (depay);
break;
default:
break;
}
return ret;
}
gboolean
gst_rtp_dv_depay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpdvdepay",
GST_RANK_NONE, GST_TYPE_RTP_DV_DEPAY);
}

67
gst/rtp/gstrtpdvdepay.h Normal file
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@ -0,0 +1,67 @@
/* Farsight
* Copyright (C) 2006 Marcel Moreaux <marcelm@spacelabs.nl>
*
* 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.
*/
#ifndef __GSTRTPDVDEPAY_H__
#define __GSTRTPDVDEPAY_H__
#include <gst/gst.h>
#include <gst/rtp/gstbasertpdepayload.h>
G_BEGIN_DECLS
/* #define's don't like whitespacey bits */
#define GST_TYPE_RTP_DV_DEPAY (gst_rtp_dv_depay_get_type())
#define GST_RTP_DV_DEPAY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_DV_DEPAY,GstRTPDVDepay))
#define GST_RTP_DV_DEPAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_DV_DEPAY,GstRTPDVDepay))
#define GST_IS_RTP_DV_DEPAY(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_DV_DEPAY))
#define GST_IS_RTP_DV_DEPAY_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_DV_DEPAY))
typedef struct _GstRTPDVDepay GstRTPDVDepay;
typedef struct _GstRTPDVDepayClass GstRTPDVDepayClass;
struct _GstRTPDVDepay
{
GstBaseRTPDepayload parent;
GstBuffer *acc;
guint frame_size;
guint frame_nr;
guint32 prev_ts;
gboolean have_header;
gint width, height;
gint rate_num, rate_denom;
gboolean negotiated;
};
struct _GstRTPDVDepayClass
{
GstBaseRTPDepayloadClass parent_class;
};
GType gst_rtp_dv_depay_get_type (void);
gboolean gst_rtp_dv_depay_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GSTRTPDVDEPAY_H__ */

386
gst/rtp/gstrtpdvpay.c Normal file
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@ -0,0 +1,386 @@
/* Farsight
* Copyright (C) 2006 Marcel Moreaux <marcelm@spacelabs.nl>
* (C) 2008 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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtpdvpay.h"
GST_DEBUG_CATEGORY (rtpdvpay_debug);
#define GST_CAT_DEFAULT (rtpdvpay_debug)
/* Elementfactory information */
static GstElementDetails gst_rtp_dv_pay_details = {
"RTP DV Payloader",
"Codec/Payloader/Network",
"Payloads DV into RTP packets (RFC 3189)",
"Marcel Moreaux <marcelm@spacelabs.nl>, Wim Taymans <wim.taymans@gmail.com>"
};
#define DEFAULT_MODE GST_DV_PAY_MODE_VIDEO
enum
{
PROP_0,
PROP_MODE
};
/* takes both system and non-system streams */
static GstStaticPadTemplate gst_rtp_dv_pay_sink_template =
GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("video/x-dv")
);
static GstStaticPadTemplate gst_rtp_dv_pay_src_template =
GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS ("application/x-rtp, "
"media = (string) { \"video\", \"audio\" } ,"
"payload = (int) " GST_RTP_PAYLOAD_DYNAMIC_STRING ", "
"encoding-name = (string) \"DV\", "
"clock-rate = (int) 90000,"
"encode = (string) { \"SD-VCR/525-60\", \"SD-VCR/625-50\", \"HD-VCR/1125-60\","
"\"HD-VCR/1250-50\", \"SDL-VCR/525-60\", \"SDL-VCR/625-50\","
"\"306M/525-60\", \"306M/625-50\", \"314M-25/525-60\","
"\"314M-25/625-50\", \"314M-50/525-60\", \"314M-50/625-50\" }"
/* optional parameters can't go in the template
* "audio = (string) { \"bundled\", \"none\" }"
*/
)
);
static gboolean gst_rtp_dv_pay_setcaps (GstBaseRTPPayload * payload,
GstCaps * caps);
static GstFlowReturn gst_rtp_dv_pay_handle_buffer (GstBaseRTPPayload * payload,
GstBuffer * buffer);
#define GST_TYPE_DV_PAY_MODE (gst_dv_pay_mode_get_type())
static GType
gst_dv_pay_mode_get_type (void)
{
static GType dv_pay_mode_type = 0;
static const GEnumValue dv_pay_modes[] = {
{GST_DV_PAY_MODE_VIDEO, "Video only", "video"},
{GST_DV_PAY_MODE_BUNDLED, "Video and Audio bundled", "bundled"},
{GST_DV_PAY_MODE_AUDIO, "Audio only", "audio"},
{0, NULL, NULL},
};
if (!dv_pay_mode_type) {
dv_pay_mode_type = g_enum_register_static ("GstDVPayMode", dv_pay_modes);
}
return dv_pay_mode_type;
}
static void gst_dv_pay_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec);
static void gst_dv_pay_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec);
GST_BOILERPLATE (GstRTPDVPay, gst_rtp_dv_pay, GstBaseRTPPayload,
GST_TYPE_BASE_RTP_PAYLOAD)
static void gst_rtp_dv_pay_base_init (gpointer g_class)
{
GstElementClass *element_class = GST_ELEMENT_CLASS (g_class);
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_dv_pay_sink_template));
gst_element_class_add_pad_template (element_class,
gst_static_pad_template_get (&gst_rtp_dv_pay_src_template));
gst_element_class_set_details (element_class, &gst_rtp_dv_pay_details);
}
static void
gst_rtp_dv_pay_class_init (GstRTPDVPayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseRTPPayloadClass *gstbasertppayload_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gstbasertppayload_class = (GstBaseRTPPayloadClass *) klass;
gobject_class->set_property = gst_dv_pay_set_property;
gobject_class->get_property = gst_dv_pay_get_property;
gstbasertppayload_class->set_caps = gst_rtp_dv_pay_setcaps;
gstbasertppayload_class->handle_buffer = gst_rtp_dv_pay_handle_buffer;
g_object_class_install_property (gobject_class, PROP_MODE,
g_param_spec_enum ("mode", "Mode",
"The payload mode of payloading",
GST_TYPE_DV_PAY_MODE, DEFAULT_MODE,
G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
GST_DEBUG_CATEGORY_INIT (rtpdvpay_debug, "rtpdvpay", 0, "DV RTP Payloader");
}
static void
gst_rtp_dv_pay_init (GstRTPDVPay * rtpdvpay, GstRTPDVPayClass * klass)
{
}
static void
gst_dv_pay_set_property (GObject * object,
guint prop_id, const GValue * value, GParamSpec * pspec)
{
GstRTPDVPay *rtpdvpay = GST_RTP_DV_PAY (object);
switch (prop_id) {
case PROP_MODE:
rtpdvpay->mode = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_dv_pay_get_property (GObject * object,
guint prop_id, GValue * value, GParamSpec * pspec)
{
GstRTPDVPay *rtpdvpay = GST_RTP_DV_PAY (object);
switch (prop_id) {
case PROP_MODE:
g_value_set_enum (value, rtpdvpay->mode);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_rtp_dv_pay_setcaps (GstBaseRTPPayload * payload, GstCaps * caps)
{
GstRTPDVPay *rtpdvpay;
rtpdvpay = GST_RTP_DV_PAY (payload);
/* We don't do anything here, but we could check if it's a system stream and if
* it's not, default to sending the video only. We will negotiate downstream
* caps when we get to see the first frame. */
return TRUE;
}
static gboolean
gst_dv_pay_negotiate (GstRTPDVPay * rtpdvpay, guint8 * data, guint size)
{
gchar *encode, *media;
gboolean audio_bundled;
if ((data[3] & 0x80) == 0) { /* DSF flag */
/* it's an NTSC format */
if ((data[80 * 5 + 48 + 3] & 0x4) && (data[80 * 5 + 48] == 0x60)) { /* 4:2:2 sampling */
/* NTSC 50Mbps */
encode = "314M-25/525-60";
} else { /* 4:1:1 sampling */
/* NTSC 25Mbps */
encode = "SD-VCR/525-60";
}
} else {
/* it's a PAL format */
if ((data[80 * 5 + 48 + 3] & 0x4) && (data[80 * 5 + 48] == 0x60)) { /* 4:2:2 sampling */
/* PAL 50Mbps */
encode = "314M-50/625-50";
} else if ((data[5] & 0x07) == 0) { /* APT flag */
/* PAL 25Mbps 4:2:0 */
encode = "SD-VCR/625-50";
} else
/* PAL 25Mbps 4:1:1 */
encode = "314M-25/625-50";
}
media = "video";
audio_bundled = FALSE;
switch (rtpdvpay->mode) {
case GST_DV_PAY_MODE_AUDIO:
media = "audio";
break;
case GST_DV_PAY_MODE_BUNDLED:
audio_bundled = TRUE;
break;
default:
break;
}
gst_basertppayload_set_options (GST_BASE_RTP_PAYLOAD (rtpdvpay), media, TRUE,
"DV", 90000);
if (audio_bundled) {
gst_basertppayload_set_outcaps (GST_BASE_RTP_PAYLOAD (rtpdvpay),
"encode", G_TYPE_STRING, encode,
"audio", G_TYPE_STRING, "bundled", NULL);
} else {
gst_basertppayload_set_outcaps (GST_BASE_RTP_PAYLOAD (rtpdvpay),
"encode", G_TYPE_STRING, encode, NULL);
}
return TRUE;
}
static gboolean
include_dif (GstRTPDVPay * rtpdvpay, guint8 * data)
{
gint block_type;
gboolean res;
block_type = data[0] >> 5;
switch (block_type) {
case 0: /* Header block */
case 1: /* Subcode block */
case 2: /* VAUX block */
/* always include these blocks */
res = TRUE;
break;
case 3: /* Audio block */
/* never include audio if we are doing video only */
if (rtpdvpay->mode == GST_DV_PAY_MODE_VIDEO)
res = FALSE;
else
res = TRUE;
break;
case 4: /* Video block */
/* never include video if we are doing audio only */
if (rtpdvpay->mode == GST_DV_PAY_MODE_AUDIO)
res = FALSE;
else
res = TRUE;
break;
default: /* Something bogus, just ignore */
res = FALSE;
break;
}
return res;
}
/* Get a DV frame, chop it up in pieces, and push the pieces to the RTP layer.
*/
static GstFlowReturn
gst_rtp_dv_pay_handle_buffer (GstBaseRTPPayload * basepayload,
GstBuffer * buffer)
{
GstRTPDVPay *rtpdvpay;
guint max_payload_size;
GstBuffer *outbuf;
GstFlowReturn ret = GST_FLOW_OK;
gint hdrlen;
guint size;
guint8 *data;
guint8 *dest;
guint filled;
rtpdvpay = GST_RTP_DV_PAY (basepayload);
hdrlen = gst_rtp_buffer_calc_header_len (0);
/* DV frames are made up from a bunch of DIF blocks. DIF blocks are 80 bytes
* each, and we should put an integral number of them in each RTP packet.
* Therefore, we round the available room down to the nearest multiple of 80.
*
* The available room is just the packet MTU, minus the RTP header length. */
max_payload_size = ((GST_BASE_RTP_PAYLOAD_MTU (rtpdvpay) - hdrlen) / 80) * 80;
/* The length of the buffer to transmit. */
size = GST_BUFFER_SIZE (buffer);
data = GST_BUFFER_DATA (buffer);
GST_DEBUG_OBJECT (rtpdvpay,
"DV RTP payloader got buffer of %u bytes, splitting in %u byte "
"payload fragments, at time %" GST_TIME_FORMAT, size, max_payload_size,
GST_TIME_ARGS (GST_BUFFER_TIMESTAMP (buffer)));
if (!rtpdvpay->negotiated) {
gst_dv_pay_negotiate (rtpdvpay, data, size);
/* if we have not yet scanned the stream for its type, do so now */
rtpdvpay->negotiated = TRUE;
}
outbuf = NULL;
dest = NULL;
filled = 0;
/* while we have a complete DIF chunks left */
while (size >= 80) {
/* Allocate a new buffer, set the timestamp */
if (outbuf == NULL) {
outbuf = gst_rtp_buffer_new_allocate (max_payload_size, 0, 0);
GST_BUFFER_TIMESTAMP (outbuf) = GST_BUFFER_TIMESTAMP (buffer);
dest = gst_rtp_buffer_get_payload (outbuf);
filled = 0;
}
/* inspect the DIF chunk, if we don't need to include it, skip to the next one. */
if (include_dif (rtpdvpay, data)) {
/* copy data in packet */
memcpy (dest, data, 80);
dest += 80;
filled += 80;
}
/* go to next dif chunk */
size -= 80;
data += 80;
/* push out the buffer if the next one would exceed the max packet size or
* when we are pushing the last packet */
if (filled + 80 > max_payload_size || size < 80) {
if (size < 160) {
guint hlen;
/* set marker */
gst_rtp_buffer_set_marker (outbuf, TRUE);
/* shrink buffer to last packet */
hlen = gst_rtp_buffer_get_header_len (outbuf);
gst_rtp_buffer_set_packet_len (outbuf, hlen + filled);
}
/* Push out the created piece, and check for errors. */
ret = gst_basertppayload_push (basepayload, outbuf);
if (ret != GST_FLOW_OK)
break;
outbuf = NULL;
}
}
gst_buffer_unref (buffer);
return ret;
}
gboolean
gst_rtp_dv_pay_plugin_init (GstPlugin * plugin)
{
return gst_element_register (plugin, "rtpdvpay",
GST_RANK_NONE, GST_TYPE_RTP_DV_PAY);
}

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/* Farsight
* Copyright (C) 2006 Marcel Moreaux <marcelm@spacelabs.nl>
*
* 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.
*/
#ifndef __GSTRTPDVPAY_H__
#define __GSTRTPDVPAY_H__
#include <gst/gst.h>
#include <gst/rtp/gstbasertppayload.h>
G_BEGIN_DECLS
typedef struct _GstRTPDVPay GstRTPDVPay;
typedef struct _GstRTPDVPayClass GstRTPDVPayClass;
#define GST_TYPE_RTP_DV_PAY \
(gst_rtp_dv_pay_get_type())
#define GST_RTP_DV_PAY(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_RTP_DV_PAY,GstRTPDVPay))
#define GST_RTP_DV_PAY_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_RTP_DV_PAY,GstRTPDVPay))
#define GST_IS_RTP_DV_PAY(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_RTP_DV_PAY))
#define GST_IS_RTP_DV_PAY_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_RTP_DV_PAY))
typedef enum
{
GST_DV_PAY_MODE_VIDEO,
GST_DV_PAY_MODE_BUNDLED,
GST_DV_PAY_MODE_AUDIO
} GstDVPayMode;
struct _GstRTPDVPay
{
GstBaseRTPPayload payload;
gboolean negotiated;
GstDVPayMode mode;
};
struct _GstRTPDVPayClass
{
GstBaseRTPPayloadClass parent_class;
};
gboolean gst_rtp_dv_pay_plugin_init (GstPlugin * plugin);
G_END_DECLS
#endif /* __GSTRTPDVPAY_H__ */