#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)
gint channels, rate;
gboolean res;
gchar *params;
+ GstAudioChannelPosition *pos;
+ const GstRTPChannelOrder *order;
rtpL16pay = GST_RTP_L16_PAY (basepayload);
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;
--- /dev/null
+/* 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;
+}
--- /dev/null
+/* 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);
projects / platform / upstream / gst-plugins-good.git / commitdiff