--- /dev/null
+/*****************************************************************************
+ * rtp.c: rtp stream output module
+ *****************************************************************************
+ * Copyright (C) 2003-2004 the VideoLAN team
+ * Copyright © 2007 Rémi Denis-Courmont
+ * $Id$
+ *
+ * Authors: Laurent Aimar <fenrir@via.ecp.fr>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
+ *****************************************************************************/
+
+#include <vlc/vlc.h>
+#include <vlc_sout.h>
+#include <vlc_block.h>
+
+#include "rtp.h"
+
+int rtp_packetize_mpa( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ int i_max = rtp_mtu (id) - 12 - 4; /* payload max in one packet */
+ int i_count = ( in->i_buffer + i_max - 1 ) / i_max;
+
+ uint8_t *p_data = in->p_buffer;
+ int i_data = in->i_buffer;
+ int i;
+
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out = block_New( p_stream, 16 + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, (i == i_count - 1)?1:0, in->i_pts );
+ /* mbz set to 0 */
+ out->p_buffer[12] = 0;
+ out->p_buffer[13] = 0;
+ /* fragment offset in the current frame */
+ out->p_buffer[14] = ( (i*i_max) >> 8 )&0xff;
+ out->p_buffer[15] = ( (i*i_max) )&0xff;
+ memcpy( &out->p_buffer[16], p_data, i_payload );
+
+ out->i_buffer = 16 + i_payload;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+/* rfc2250 */
+int rtp_packetize_mpv( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ int i_max = rtp_mtu (id) - 12 - 4; /* payload max in one packet */
+ int i_count = ( in->i_buffer + i_max - 1 ) / i_max;
+
+ uint8_t *p_data = in->p_buffer;
+ int i_data = in->i_buffer;
+ int i;
+ int b_sequence_start = 0;
+ int i_temporal_ref = 0;
+ int i_picture_coding_type = 0;
+ int i_fbv = 0, i_bfc = 0, i_ffv = 0, i_ffc = 0;
+ int b_start_slice = 0;
+
+ /* preparse this packet to get some info */
+ if( in->i_buffer > 4 )
+ {
+ uint8_t *p = p_data;
+ int i_rest = in->i_buffer;
+
+ for( ;; )
+ {
+ while( i_rest > 4 &&
+ ( p[0] != 0x00 || p[1] != 0x00 || p[2] != 0x01 ) )
+ {
+ p++;
+ i_rest--;
+ }
+ if( i_rest <= 4 )
+ {
+ break;
+ }
+ p += 3;
+ i_rest -= 4;
+
+ if( *p == 0xb3 )
+ {
+ /* sequence start code */
+ b_sequence_start = 1;
+ }
+ else if( *p == 0x00 && i_rest >= 4 )
+ {
+ /* picture */
+ i_temporal_ref = ( p[1] << 2) |((p[2]>>6)&0x03);
+ i_picture_coding_type = (p[2] >> 3)&0x07;
+
+ if( i_rest >= 4 && ( i_picture_coding_type == 2 ||
+ i_picture_coding_type == 3 ) )
+ {
+ i_ffv = (p[3] >> 2)&0x01;
+ i_ffc = ((p[3]&0x03) << 1)|((p[4]>>7)&0x01);
+ if( i_rest > 4 && i_picture_coding_type == 3 )
+ {
+ i_fbv = (p[4]>>6)&0x01;
+ i_bfc = (p[4]>>3)&0x07;
+ }
+ }
+ }
+ else if( *p <= 0xaf )
+ {
+ b_start_slice = 1;
+ }
+ }
+ }
+
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out = block_New( p_stream,
+ 16 + i_payload );
+ uint32_t h = ( i_temporal_ref << 16 )|
+ ( b_sequence_start << 13 )|
+ ( b_start_slice << 12 )|
+ ( i == i_count - 1 ? 1 << 11 : 0 )|
+ ( i_picture_coding_type << 8 )|
+ ( i_fbv << 7 )|( i_bfc << 4 )|( i_ffv << 3 )|i_ffc;
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, (i == i_count - 1)?1:0,
+ in->i_pts > 0 ? in->i_pts : in->i_dts );
+
+ /* MBZ:5 T:1 TR:10 AN:1 N:1 S:1 B:1 E:1 P:3 FBV:1 BFC:3 FFV:1 FFC:3 */
+ out->p_buffer[12] = ( h >> 24 )&0xff;
+ out->p_buffer[13] = ( h >> 16 )&0xff;
+ out->p_buffer[14] = ( h >> 8 )&0xff;
+ out->p_buffer[15] = ( h )&0xff;
+
+ memcpy( &out->p_buffer[16], p_data, i_payload );
+
+ out->i_buffer = 16 + i_payload;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_ac3( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ int i_max = rtp_mtu (id) - 12 - 2; /* payload max in one packet */
+ int i_count = ( in->i_buffer + i_max - 1 ) / i_max;
+
+ uint8_t *p_data = in->p_buffer;
+ int i_data = in->i_buffer;
+ int i;
+
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out = block_New( p_stream, 14 + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, (i == i_count - 1)?1:0, in->i_pts );
+ /* unit count */
+ out->p_buffer[12] = 1;
+ /* unit header */
+ out->p_buffer[13] = 0x00;
+ /* data */
+ memcpy( &out->p_buffer[14], p_data, i_payload );
+
+ out->i_buffer = 14 + i_payload;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_split( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ int i_max = rtp_mtu (id) - 12; /* payload max in one packet */
+ int i_count = ( in->i_buffer + i_max - 1 ) / i_max;
+
+ uint8_t *p_data = in->p_buffer;
+ int i_data = in->i_buffer;
+ int i;
+
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out = block_New( p_stream, 12 + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, (i == i_count - 1),
+ (in->i_pts > 0 ? in->i_pts : in->i_dts) );
+ memcpy( &out->p_buffer[12], p_data, i_payload );
+
+ out->i_buffer = 12 + i_payload;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+/* rfc3016 */
+int rtp_packetize_mp4a_latm( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ int i_max = rtp_mtu (id) - 14; /* payload max in one packet */
+ int latmhdrsize = in->i_buffer / 0xff + 1;
+ int i_count = ( in->i_buffer + i_max - 1 ) / i_max;
+
+ uint8_t *p_data = in->p_buffer, *p_header = NULL;
+ int i_data = in->i_buffer;
+ int i;
+
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out;
+
+ if( i != 0 )
+ latmhdrsize = 0;
+ out = block_New( p_stream, 12 + latmhdrsize + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, ((i == i_count - 1) ? 1 : 0),
+ (in->i_pts > 0 ? in->i_pts : in->i_dts) );
+
+ if( i == 0 )
+ {
+ int tmp = in->i_buffer;
+
+ p_header=out->p_buffer+12;
+ while( tmp > 0xfe )
+ {
+ *p_header = 0xff;
+ p_header++;
+ tmp -= 0xff;
+ }
+ *p_header = tmp;
+ }
+
+ memcpy( &out->p_buffer[12+latmhdrsize], p_data, i_payload );
+
+ out->i_buffer = 12 + latmhdrsize + i_payload;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_l16( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ const uint8_t *p_data = in->p_buffer;
+ size_t i_data = in->i_buffer;
+ size_t i_plen = 2 * rtp_plen (id, 20);
+
+ for( unsigned i_packet = 0; i_data > 0; i_packet++ )
+ {
+ int i_payload = __MIN( i_plen, i_data );
+ block_t *out = block_New( p_stream, 12 + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, 0,
+ (in->i_pts > 0 ? in->i_pts : in->i_dts) );
+ memcpy( &out->p_buffer[12], p_data, i_payload );
+
+ out->i_buffer = 12 + i_payload;
+ out->i_dts = in->i_dts + i_packet * 20000;
+ out->i_length = i_payload * 20000 / i_plen;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_l8( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ const uint8_t *p_data = in->p_buffer;
+ size_t i_data = in->i_buffer;
+ size_t i_plen = rtp_plen (id, 20);
+
+ for( unsigned i_packet = 0; i_data > 0; i_packet++ )
+ {
+ int i_payload = __MIN( i_plen, i_data );
+ block_t *out = block_New( p_stream, 12 + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, 0,
+ (in->i_pts > 0 ? in->i_pts : in->i_dts) );
+ memcpy( &out->p_buffer[12], p_data, i_payload );
+
+ out->i_buffer = 12 + i_payload;
+ out->i_dts = in->i_dts + i_packet * 20000;
+ out->i_length = i_payload * 20000 / i_plen;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_mp4a( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ int i_max = rtp_mtu (id) - 16; /* payload max in one packet */
+ int i_count = ( in->i_buffer + i_max - 1 ) / i_max;
+
+ uint8_t *p_data = in->p_buffer;
+ int i_data = in->i_buffer;
+ int i;
+
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out = block_New( p_stream, 16 + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, ((i == i_count - 1)?1:0),
+ (in->i_pts > 0 ? in->i_pts : in->i_dts) );
+ /* AU headers */
+ /* AU headers length (bits) */
+ out->p_buffer[12] = 0;
+ out->p_buffer[13] = 2*8;
+ /* for each AU length 13 bits + idx 3bits, */
+ out->p_buffer[14] = ( in->i_buffer >> 5 )&0xff;
+ out->p_buffer[15] = ( (in->i_buffer&0xff)<<3 )|0;
+
+ memcpy( &out->p_buffer[16], p_data, i_payload );
+
+ out->i_buffer = 16 + i_payload;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+
+/* rfc2429 */
+#define RTP_H263_HEADER_SIZE (2) // plen = 0
+#define RTP_H263_PAYLOAD_START (14) // plen = 0
+int rtp_packetize_h263( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ uint8_t *p_data = in->p_buffer;
+ int i_data = in->i_buffer;
+ int i;
+ int i_max = rtp_mtu (id) - 12 - RTP_H263_HEADER_SIZE; /* payload max in one packet */
+ int i_count;
+ int b_p_bit;
+ int b_v_bit = 0; // no pesky error resilience
+ int i_plen = 0; // normally plen=0 for PSC packet
+ int i_pebit = 0; // because plen=0
+ uint16_t h;
+
+ if( i_data < 2 )
+ {
+ return VLC_EGENERIC;
+ }
+ if( p_data[0] || p_data[1] )
+ {
+ return VLC_EGENERIC;
+ }
+ /* remove 2 leading 0 bytes */
+ p_data += 2;
+ i_data -= 2;
+ i_count = ( i_data + i_max - 1 ) / i_max;
+
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out = block_New( p_stream,
+ RTP_H263_PAYLOAD_START + i_payload );
+ b_p_bit = (i == 0) ? 1 : 0;
+ h = ( b_p_bit << 10 )|
+ ( b_v_bit << 9 )|
+ ( i_plen << 3 )|
+ i_pebit;
+
+ /* rtp common header */
+ //b_m_bit = 1; // always contains end of frame
+ rtp_packetize_common( id, out, (i == i_count - 1)?1:0,
+ in->i_pts > 0 ? in->i_pts : in->i_dts );
+
+ /* h263 header */
+ out->p_buffer[12] = ( h >> 8 )&0xff;
+ out->p_buffer[13] = ( h )&0xff;
+ memcpy( &out->p_buffer[RTP_H263_PAYLOAD_START], p_data, i_payload );
+
+ out->i_buffer = RTP_H263_PAYLOAD_START + i_payload;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+/* rfc3984 */
+int
+rtp_packetize_h264_nal( sout_stream_t *p_stream, sout_stream_id_t *id,
+ const uint8_t *p_data, int i_data, int64_t i_pts,
+ int64_t i_dts, vlc_bool_t b_last, int64_t i_length )
+{
+ const int i_max = rtp_mtu (id) - 12; /* payload max in one packet */
+ int i_nal_hdr;
+ int i_nal_type;
+
+ if( i_data < 5 )
+ return VLC_SUCCESS;
+
+ i_nal_hdr = p_data[3];
+ i_nal_type = i_nal_hdr&0x1f;
+
+ /* Skip start code */
+ p_data += 3;
+ i_data -= 3;
+
+ /* */
+ if( i_data <= i_max )
+ {
+ /* Single NAL unit packet */
+ block_t *out = block_New( p_stream, 12 + i_data );
+ out->i_dts = i_dts;
+ out->i_length = i_length;
+
+ /* */
+ rtp_packetize_common( id, out, b_last, i_pts );
+ out->i_buffer = 12 + i_data;
+
+ memcpy( &out->p_buffer[12], p_data, i_data );
+
+ rtp_packetize_send( id, out );
+ }
+ else
+ {
+ /* FU-A Fragmentation Unit without interleaving */
+ const int i_count = ( i_data-1 + i_max-2 - 1 ) / (i_max-2);
+ int i;
+
+ p_data++;
+ i_data--;
+
+ for( i = 0; i < i_count; i++ )
+ {
+ const int i_payload = __MIN( i_data, i_max-2 );
+ block_t *out = block_New( p_stream, 12 + 2 + i_payload );
+ out->i_dts = i_dts + i * i_length / i_count;
+ out->i_length = i_length / i_count;
+
+ /* */
+ rtp_packetize_common( id, out, (b_last && i_payload == i_data), i_pts );
+ out->i_buffer = 14 + i_payload;
+
+ /* FU indicator */
+ out->p_buffer[12] = 0x00 | (i_nal_hdr & 0x60) | 28;
+ /* FU header */
+ out->p_buffer[13] = ( i == 0 ? 0x80 : 0x00 ) | ( (i == i_count-1) ? 0x40 : 0x00 ) | i_nal_type;
+ memcpy( &out->p_buffer[14], p_data, i_payload );
+
+ rtp_packetize_send( id, out );
+
+ i_data -= i_payload;
+ p_data += i_payload;
+ }
+ }
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_h264( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ const uint8_t *p_buffer = in->p_buffer;
+ int i_buffer = in->i_buffer;
+
+ while( i_buffer > 4 && ( p_buffer[0] != 0 || p_buffer[1] != 0 || p_buffer[2] != 1 ) )
+ {
+ i_buffer--;
+ p_buffer++;
+ }
+
+ /* Split nal units */
+ while( i_buffer > 4 )
+ {
+ int i_offset;
+ int i_size = i_buffer;
+ int i_skip = i_buffer;
+
+ /* search nal end */
+ for( i_offset = 4; i_offset+2 < i_buffer ; i_offset++)
+ {
+ if( p_buffer[i_offset] == 0 && p_buffer[i_offset+1] == 0 && p_buffer[i_offset+2] == 1 )
+ {
+ /* we found another startcode */
+ i_size = i_offset - ( p_buffer[i_offset-1] == 0 ? 1 : 0);
+ i_skip = i_offset;
+ break;
+ }
+ }
+ /* TODO add STAP-A to remove a lot of overhead with small slice/sei/... */
+ rtp_packetize_h264_nal( p_stream, id, p_buffer, i_size,
+ (in->i_pts > 0 ? in->i_pts : in->i_dts), in->i_dts,
+ (i_size >= i_buffer), in->i_length * i_size / in->i_buffer );
+
+ i_buffer -= i_skip;
+ p_buffer += i_skip;
+ }
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_amr( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ int i_max = rtp_mtu (id) - 14; /* payload max in one packet */
+ int i_count = ( in->i_buffer + i_max - 1 ) / i_max;
+
+ uint8_t *p_data = in->p_buffer;
+ int i_data = in->i_buffer;
+ int i;
+
+ /* Only supports octet-aligned mode */
+ for( i = 0; i < i_count; i++ )
+ {
+ int i_payload = __MIN( i_max, i_data );
+ block_t *out = block_New( p_stream, 14 + i_payload );
+
+ /* rtp common header */
+ rtp_packetize_common( id, out, ((i == i_count - 1)?1:0),
+ (in->i_pts > 0 ? in->i_pts : in->i_dts) );
+ /* Payload header */
+ out->p_buffer[12] = 0xF0; /* CMR */
+ out->p_buffer[13] = p_data[0]&0x7C; /* ToC */ /* FIXME: frame type */
+
+ /* FIXME: are we fed multiple frames ? */
+ memcpy( &out->p_buffer[14], p_data+1, i_payload-1 );
+
+ out->i_buffer = 14 + i_payload-1;
+ out->i_dts = in->i_dts + i * in->i_length / i_count;
+ out->i_length = in->i_length / i_count;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+int rtp_packetize_t140( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ const size_t i_max = rtp_mtu (id) - 12;
+ const uint8_t *p_data = in->p_buffer;
+ size_t i_data = in->i_buffer;
+
+ for( unsigned i_packet = 0; i_data > 0; i_packet++ )
+ {
+ size_t i_payload = i_data;
+
+ /* Make sure we stop on an UTF-8 character boundary
+ * (assuming the input is valid UTF-8) */
+ if( i_data > i_max )
+ {
+ i_payload = i_max;
+
+ while( ( p_data[i_payload] & 0xC0 ) == 0x80 )
+ {
+ if( i_payload == 0 )
+ return VLC_SUCCESS; /* fishy input! */
+
+ i_payload--;
+ }
+ }
+
+ block_t *out = block_New( p_stream, 12 + i_payload );
+ if( out == NULL )
+ return VLC_SUCCESS;
+
+ rtp_packetize_common( id, out, 0, in->i_pts + i_packet );
+ memcpy( out->p_buffer + 12, p_data, i_payload );
+
+ out->i_buffer = 12 + i_payload;
+ out->i_dts = out->i_pts;
+ out->i_length = 0;
+
+ rtp_packetize_send( id, out );
+
+ p_data += i_payload;
+ i_data -= i_payload;
+ }
+
+ return VLC_SUCCESS;
+}
+
+
+int rtp_packetize_spx( sout_stream_t *p_stream, sout_stream_id_t *id,
+ block_t *in )
+{
+ uint8_t *p_buffer = in->p_buffer;
+ int i_data_size, i_payload_size, i_payload_padding;
+ i_data_size = i_payload_size = in->i_buffer;
+ i_payload_padding = 0;
+ block_t *p_out;
+
+ if ( in->i_buffer + 12 > rtp_mtu (id) )
+ {
+ msg_Warn( p_stream, "Cannot send packet larger than output MTU" );
+ return VLC_SUCCESS;
+ }
+
+ /*
+ RFC for Speex in RTP says that each packet must end on an octet
+ boundary. So, we check to see if the number of bytes % 4 is zero.
+ If not, we have to add some padding.
+
+ This MAY be overkill since packetization is handled elsewhere and
+ appears to ensure the octet boundary. However, better safe than
+ sorry.
+ */
+ if ( i_payload_size % 4 )
+ {
+ i_payload_padding = 4 - ( i_payload_size % 4 );
+ i_payload_size += i_payload_padding;
+ }
+
+ /*
+ Allocate a new RTP p_output block of the appropriate size.
+ Allow for 12 extra bytes of RTP header.
+ */
+ p_out = block_New( p_stream, 12 + i_payload_size );
+
+ if ( i_payload_padding )
+ {
+ /*
+ The padding is required to be a zero followed by all 1s.
+ */
+ char c_first_pad, c_remaining_pad;
+ c_first_pad = 0x7F;
+ c_remaining_pad = 0xFF;
+
+ /*
+ Allow for 12 bytes before the i_data_size because
+ of the expected RTP header added during
+ rtp_packetize_common.
+ */
+ p_out->p_buffer[12 + i_data_size] = c_first_pad;
+ switch (i_payload_padding)
+ {
+ case 2:
+ p_out->p_buffer[12 + i_data_size + 1] = c_remaining_pad;
+ break;
+ case 3:
+ p_out->p_buffer[12 + i_data_size + 1] = c_remaining_pad;
+ p_out->p_buffer[12 + i_data_size + 2] = c_remaining_pad;
+ break;
+ }
+ }
+
+ /* Add the RTP header to our p_output buffer. */
+ rtp_packetize_common( id, p_out, 0, (in->i_pts > 0 ? in->i_pts : in->i_dts) );
+ /* Copy the Speex payload to the p_output buffer */
+ memcpy( &p_out->p_buffer[12], p_buffer, i_data_size );
+
+ p_out->i_buffer = 12 + i_payload_size;
+ p_out->i_dts = in->i_dts;
+ p_out->i_length = in->i_length;
+
+ /* Queue the buffer for actual transmission. */
+ rtp_packetize_send( id, p_out );
+ return VLC_SUCCESS;
+}
projects / vlc / blobdiff