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gst/rtp/: Add mappings for multichannel support. Does not completely just work because the getcaps function does not ...

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Original commit message from CVS:
* gst/rtp/gstrtpL16depay.c: (gst_rtp_L16_depay_setcaps):
* gst/rtp/gstrtpL16pay.c: (gst_rtp_L16_pay_setcaps),
(gst_rtp_L16_pay_getcaps):
* gst/rtp/gstrtpchannels.c: (check_channels),
(gst_rtp_channels_get_by_pos), (gst_rtp_channels_get_by_order),
(gst_rtp_channels_create_default):
* gst/rtp/gstrtpchannels.h:
Add mappings for multichannel support. Does not completely just work
because the getcaps function does not yet return the allowed channel
mappings. See #556641.
This commit is contained in:
Wim Taymans 2008-10-28 10:01:49 +00:00
parent 6eb6d5b9ac
commit 09e449609f
5 changed files with 388 additions and 3 deletions
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13
ChangeLog
View file

@ -1,3 +1,16 @@
2008-10-28 Wim Taymans <wim.taymans@collabora.co.uk>
* gst/rtp/gstrtpL16depay.c: (gst_rtp_L16_depay_setcaps):
* gst/rtp/gstrtpL16pay.c: (gst_rtp_L16_pay_setcaps),
(gst_rtp_L16_pay_getcaps):
* gst/rtp/gstrtpchannels.c: (check_channels),
(gst_rtp_channels_get_by_pos), (gst_rtp_channels_get_by_order),
(gst_rtp_channels_create_default):
* gst/rtp/gstrtpchannels.h:
Add mappings for multichannel support. Does not completely just work
because the getcaps function does not yet return the allowed channel
mappings. See #556641.
2008-10-28 Stefan Kost <ensonic@users.sf.net>
* gst/goom/Makefile.am:

26
gst/rtp/gstrtpL16depay.c
View file

@ -24,7 +24,11 @@
#include <string.h>
#include <stdlib.h>
#include <gst/audio/audio.h>
#include <gst/audio/multichannel.h>
#include "gstrtpL16depay.h"
#include "gstrtpchannels.h"
GST_DEBUG_CATEGORY_STATIC (rtpL16depay_debug);
#define GST_CAT_DEFAULT (rtpL16depay_debug)
@ -146,6 +150,8 @@ gst_rtp_L16_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
gint channels;
GstCaps *srccaps;
gboolean res;
const gchar *channel_order;
const GstRTPChannelOrder *order;
rtpL16depay = GST_RTP_L16_DEPAY (depayload);
@ -163,6 +169,7 @@ gst_rtp_L16_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
clock_rate = 44100;
break;
default:
/* no fixed mapping, we need channels and clock-rate */
channels = 0;
clock_rate = 0;
break;
@ -189,6 +196,25 @@ gst_rtp_L16_depay_setcaps (GstBaseRTPDepayload * depayload, GstCaps * caps)
"depth", G_TYPE_INT, 16,
"rate", G_TYPE_INT, clock_rate, "channels", G_TYPE_INT, channels, NULL);
/* add channel positions */
channel_order = gst_structure_get_string (structure, "channel-order");
order = gst_rtp_channels_get_by_order (channels, channel_order);
if (order) {
gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0),
order->pos);
} else {
GstAudioChannelPosition *pos;
GST_ELEMENT_WARNING (rtpL16depay, STREAM, DECODE,
(NULL), ("Unknown channel order '%s' for %d channels",
GST_STR_NULL (channel_order), channels));
/* create default NONE layout */
pos = gst_rtp_channels_create_default (channels);
gst_audio_set_channel_positions (gst_caps_get_structure (srccaps, 0), pos);
g_free (pos);
}
res = gst_pad_set_caps (depayload->srcpad, srccaps);
gst_caps_unref (srccaps);

31
gst/rtp/gstrtpL16pay.c
View file

@ -23,9 +23,12 @@
#include <string.h>
#include <gst/audio/audio.h>
#include <gst/audio/multichannel.h>
#include <gst/rtp/gstrtpbuffer.h>
#include "gstrtpL16pay.h"
#include "gstrtpchannels.h"
GST_DEBUG_CATEGORY_STATIC (rtpL16pay_debug);
#define GST_CAT_DEFAULT (rtpL16pay_debug)
@ -173,6 +176,8 @@ gst_rtp_L16_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
gint channels, rate;
gboolean res;
gchar *params;
GstAudioChannelPosition *pos;
const GstRTPChannelOrder *order;
rtpL16pay = GST_RTP_L16_PAY (basepayload);
@ -185,13 +190,33 @@ gst_rtp_L16_pay_setcaps (GstBaseRTPPayload * basepayload, GstCaps * caps)
if (!gst_structure_get_int (structure, "channels", &channels))
goto no_channels;
/* get the channel order */
pos = gst_audio_get_channel_positions (structure);
if (pos)
order = gst_rtp_channels_get_by_pos (channels, pos);
else
order = NULL;
gst_basertppayload_set_options (basepayload, "audio", TRUE, "L16", rate);
params = g_strdup_printf ("%d", channels);
res = gst_basertppayload_set_outcaps (basepayload,
"encoding-params", G_TYPE_STRING, params, "channels", G_TYPE_INT,
channels, NULL);
if (!order && channels > 2) {
GST_ELEMENT_WARNING (rtpL16pay, STREAM, DECODE,
(NULL), ("Unknown channel order for %d channels", channels));
}
if (order && order->name) {
res = gst_basertppayload_set_outcaps (basepayload,
"encoding-params", G_TYPE_STRING, params, "channels", G_TYPE_INT,
channels, "channel-order", G_TYPE_STRING, order->name, NULL);
} else {
res = gst_basertppayload_set_outcaps (basepayload,
"encoding-params", G_TYPE_STRING, params, "channels", G_TYPE_INT,
channels, NULL);
}
g_free (params);
g_free (pos);
rtpL16pay->rate = rate;
rtpL16pay->channels = channels;

136
gst/rtp/gstrtpchannels.c Normal file
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@ -0,0 +1,136 @@
/* GStreamer
* Copyright (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.
*/
#include <string.h>
#include <stdlib.h>
#include "gstrtpchannels.h"
/*
* RTP channel positions as discussed in RFC 3551 and also RFC 3555
*
* We can't really represent the described channel positions in GStreamer but we
* implement a (very rough) approximation here.
*/
static gboolean
check_channels (const GstRTPChannelOrder * order,
const GstAudioChannelPosition * pos)
{
gint i;
gboolean res = TRUE;
for (i = 0; i < order->channels; i++) {
if (order->pos[i] != pos[i]) {
res = FALSE;
break;
}
}
return res;
}
/**
* gst_rtp_channels_get_by_pos:
* @channels: the amount of channels
* @pos: a channel layout
*
* Return a description of the channel layout.
*
* Returns: a #GstRTPChannelOrder with the channel information or NULL when @pos
* is not a valid layout.
*/
const GstRTPChannelOrder *
gst_rtp_channels_get_by_pos (gint channels, const GstAudioChannelPosition * pos)
{
gint i;
const GstRTPChannelOrder *res = NULL;
g_return_val_if_fail (pos != NULL, NULL);
for (i = 0; channel_orders[i].pos; i++) {
if (channel_orders[i].channels != channels)
continue;
if (check_channels (&channel_orders[i], pos)) {
res = &channel_orders[i];
break;
}
}
return res;
}
/**
* gst_rtp_channels_create_default:
* @channels: the amount of channels
* @order: a channel order
*
* Get the channel order info the @order and @channels.
*
* Returns: a #GstRTPChannelOrder with the channel information or NULL when
* @order is not a know layout for @channels.
*/
const GstRTPChannelOrder *
gst_rtp_channels_get_by_order (gint channels, const gchar * order)
{
gint i;
const GstRTPChannelOrder *res = NULL;
for (i = 0; channel_orders[i].pos; i++) {
if (channel_orders[i].channels != channels)
continue;
/* no name but channels match, continue */
if (!channel_orders[i].name || !order) {
res = &channel_orders[i];
break;
}
/* compare names */
if (g_ascii_strcasecmp (channel_orders[i].name, order)) {
res = &channel_orders[i];
break;
}
}
return res;
}
/**
* gst_rtp_channels_create_default:
* @channels: the amount of channels
*
* Create a default none channel mapping for @channels.
*
* Returns: a #GstAudioChannelPosition with all the channel position info set to
* #GST_AUDIO_CHANNEL_POSITION_NONE.
*/
GstAudioChannelPosition *
gst_rtp_channels_create_default (gint channels)
{
gint i;
GstAudioChannelPosition *posn;
g_return_val_if_fail (channels > 0, NULL);
posn = g_new (GstAudioChannelPosition, channels);
for (i = 0; i < channels; i++)
posn[i] = GST_AUDIO_CHANNEL_POSITION_NONE;
return posn;
}

185
gst/rtp/gstrtpchannels.h Normal file
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@ -0,0 +1,185 @@
/* GStreamer
* Copyright (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.
*/
#include <string.h>
#include <stdlib.h>
#include <gst/audio/audio.h>
#include <gst/audio/multichannel.h>
typedef struct
{
const gchar *name;
gint channels;
const GstAudioChannelPosition *pos;
} GstRTPChannelOrder;
static const GstAudioChannelPosition pos_4_1[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT
};
static const GstAudioChannelPosition pos_4_2[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE
};
static const GstAudioChannelPosition pos_4_3[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE
};
static const GstAudioChannelPosition pos_5_1[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER
};
static const GstAudioChannelPosition pos_6_1[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE
};
static const GstAudioChannelPosition pos_6_2[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT
};
static const GstAudioChannelPosition pos_8_1[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT
};
static const GstAudioChannelPosition pos_8_2[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT
};
static const GstAudioChannelPosition pos_8_3[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_LFE,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_REAR_LEFT,
GST_AUDIO_CHANNEL_POSITION_REAR_RIGHT
};
static const GstAudioChannelPosition pos_def_1[] = {
GST_AUDIO_CHANNEL_POSITION_NONE
};
static const GstAudioChannelPosition pos_def_2[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT
};
static const GstAudioChannelPosition pos_def_3[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER
};
static const GstAudioChannelPosition pos_def_4[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_LFE
};
static const GstAudioChannelPosition pos_def_5[] = {
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT
};
static const GstAudioChannelPosition pos_def_6[] = {
GST_AUDIO_CHANNEL_POSITION_SIDE_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_LEFT,
GST_AUDIO_CHANNEL_POSITION_FRONT_CENTER,
GST_AUDIO_CHANNEL_POSITION_SIDE_RIGHT,
GST_AUDIO_CHANNEL_POSITION_FRONT_RIGHT,
GST_AUDIO_CHANNEL_POSITION_LFE
};
static const GstRTPChannelOrder channel_orders[] =
{
/* 4 channels */
{ "DV.LRLsRs", 4, pos_4_1 },
{ "DV.LRCS", 4, pos_4_2 },
{ "DV.LRCWo", 4, pos_4_3 },
/* 5 channels */
{ "DV.LRLsRsC", 5, pos_5_1 },
/* 6 channels */
{ "DV.LRLsRsCS", 6, pos_6_1 },
{ "DV.LmixRmixTWoQ1Q2", 6, pos_6_2 },
/* 8 channels */
{ "DV.LRCWoLsRsLmixRmix", 8, pos_8_1 },
{ "DV.LRCWoLs1Rs1Ls2Rs2", 8, pos_8_2 },
{ "DV.LRCWoLsRsLcRc", 8, pos_8_3 },
/* default layouts */
{ NULL, 1, pos_def_1 },
{ NULL, 2, pos_def_2 },
{ NULL, 3, pos_def_3 },
{ NULL, 4, pos_def_4 },
{ NULL, 5, pos_def_5 },
{ NULL, 6, pos_def_6 },
/* terminator, invalid entry */
{ NULL, 0, NULL },
};
const GstRTPChannelOrder * gst_rtp_channels_get_by_pos (gint channels,
const GstAudioChannelPosition *pos);
const GstRTPChannelOrder * gst_rtp_channels_get_by_order (gint channels,
const gchar *order);
GstAudioChannelPosition * gst_rtp_channels_create_default (gint channels);