853 lines
30 KiB
C
Executable File
853 lines
30 KiB
C
Executable File
/*
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* copyright (c) 2007 Luca Abeni
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include <string.h>
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#include "libavutil/avstring.h"
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#include "libavutil/base64.h"
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#include "libavutil/dict.h"
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#include "libavutil/parseutils.h"
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#include "libavutil/opt.h"
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#include "libavcodec/xiph.h"
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#include "libavcodec/mpeg4audio.h"
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#include "avformat.h"
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#include "internal.h"
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#include "avc.h"
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#include "hevc.h"
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#include "rtp.h"
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#if CONFIG_NETWORK
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#include "network.h"
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#endif
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#if CONFIG_RTP_MUXER
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#define MAX_EXTRADATA_SIZE ((INT_MAX - 10) / 2)
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struct sdp_session_level {
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int sdp_version; /**< protocol version (currently 0) */
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int id; /**< session ID */
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int version; /**< session version */
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int start_time; /**< session start time (NTP time, in seconds),
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or 0 in case of permanent session */
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int end_time; /**< session end time (NTP time, in seconds),
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or 0 if the session is not bounded */
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int ttl; /**< TTL, in case of multicast stream */
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const char *user; /**< username of the session's creator */
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const char *src_addr; /**< IP address of the machine from which the session was created */
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const char *src_type; /**< address type of src_addr */
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const char *dst_addr; /**< destination IP address (can be multicast) */
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const char *dst_type; /**< destination IP address type */
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const char *name; /**< session name (can be an empty string) */
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};
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static void sdp_write_address(char *buff, int size, const char *dest_addr,
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const char *dest_type, int ttl)
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{
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if (dest_addr) {
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if (!dest_type)
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dest_type = "IP4";
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if (ttl > 0 && !strcmp(dest_type, "IP4")) {
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/* The TTL should only be specified for IPv4 multicast addresses,
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* not for IPv6. */
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av_strlcatf(buff, size, "c=IN %s %s/%d\r\n", dest_type, dest_addr, ttl);
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} else {
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av_strlcatf(buff, size, "c=IN %s %s\r\n", dest_type, dest_addr);
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}
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}
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}
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static void sdp_write_header(char *buff, int size, struct sdp_session_level *s)
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{
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av_strlcatf(buff, size, "v=%d\r\n"
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"o=- %d %d IN %s %s\r\n"
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"s=%s\r\n",
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s->sdp_version,
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s->id, s->version, s->src_type, s->src_addr,
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s->name);
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sdp_write_address(buff, size, s->dst_addr, s->dst_type, s->ttl);
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av_strlcatf(buff, size, "t=%d %d\r\n"
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"a=tool:libavformat " AV_STRINGIFY(LIBAVFORMAT_VERSION) "\r\n",
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s->start_time, s->end_time);
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}
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#if CONFIG_NETWORK
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static int resolve_destination(char *dest_addr, int size, char *type,
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int type_size)
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{
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struct addrinfo hints = { 0 }, *ai;
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int is_multicast;
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av_strlcpy(type, "IP4", type_size);
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if (!dest_addr[0])
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return 0;
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/* Resolve the destination, since it must be written
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* as a numeric IP address in the SDP. */
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if (getaddrinfo(dest_addr, NULL, &hints, &ai))
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return 0;
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getnameinfo(ai->ai_addr, ai->ai_addrlen, dest_addr, size,
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NULL, 0, NI_NUMERICHOST);
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#ifdef AF_INET6
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if (ai->ai_family == AF_INET6)
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av_strlcpy(type, "IP6", type_size);
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#endif
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is_multicast = ff_is_multicast_address(ai->ai_addr);
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freeaddrinfo(ai);
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return is_multicast;
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}
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#else
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static int resolve_destination(char *dest_addr, int size, char *type,
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int type_size)
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{
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return 0;
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}
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#endif
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static int sdp_get_address(char *dest_addr, int size, int *ttl, const char *url)
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{
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int port;
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const char *p;
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char proto[32];
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av_url_split(proto, sizeof(proto), NULL, 0, dest_addr, size, &port, NULL, 0, url);
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*ttl = 0;
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if (strcmp(proto, "rtp") && strcmp(proto, "srtp")) {
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/* The url isn't for the actual rtp sessions,
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* don't parse out anything else than the destination.
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*/
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return 0;
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}
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p = strchr(url, '?');
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if (p) {
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char buff[64];
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if (av_find_info_tag(buff, sizeof(buff), "ttl", p)) {
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*ttl = strtol(buff, NULL, 10);
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} else {
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*ttl = 5;
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}
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}
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return port;
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}
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#define MAX_PSET_SIZE 1024
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static char *extradata2psets(AVFormatContext *s, AVCodecParameters *par)
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{
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char *psets, *p;
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const uint8_t *r;
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static const char pset_string[] = "; sprop-parameter-sets=";
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static const char profile_string[] = "; profile-level-id=";
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uint8_t *extradata = par->extradata;
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int extradata_size = par->extradata_size;
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uint8_t *tmpbuf = NULL;
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const uint8_t *sps = NULL, *sps_end;
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if (par->extradata_size > MAX_EXTRADATA_SIZE) {
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av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
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return NULL;
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}
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if (par->extradata[0] == 1) {
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if (ff_avc_write_annexb_extradata(par->extradata, &extradata,
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&extradata_size))
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return NULL;
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tmpbuf = extradata;
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}
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psets = av_mallocz(MAX_PSET_SIZE);
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if (!psets) {
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av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
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av_free(tmpbuf);
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return NULL;
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}
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memcpy(psets, pset_string, strlen(pset_string));
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p = psets + strlen(pset_string);
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r = ff_avc_find_startcode(extradata, extradata + extradata_size);
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while (r < extradata + extradata_size) {
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const uint8_t *r1;
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uint8_t nal_type;
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while (!*(r++));
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nal_type = *r & 0x1f;
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r1 = ff_avc_find_startcode(r, extradata + extradata_size);
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if (nal_type != 7 && nal_type != 8) { /* Only output SPS and PPS */
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r = r1;
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continue;
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}
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if (p != (psets + strlen(pset_string))) {
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*p = ',';
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p++;
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}
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if (!sps) {
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sps = r;
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sps_end = r1;
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}
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if (!av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r)) {
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av_log(s, AV_LOG_ERROR, "Cannot Base64-encode %"PTRDIFF_SPECIFIER" %"PTRDIFF_SPECIFIER"!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
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av_free(psets);
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av_free(tmpbuf);
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return NULL;
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}
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p += strlen(p);
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r = r1;
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}
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if (sps && sps_end - sps >= 4) {
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memcpy(p, profile_string, strlen(profile_string));
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p += strlen(p);
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ff_data_to_hex(p, sps + 1, 3, 0);
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p[6] = '\0';
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}
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av_free(tmpbuf);
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return psets;
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}
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static char *extradata2psets_hevc(AVCodecParameters *par)
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{
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char *psets;
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uint8_t *extradata = par->extradata;
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int extradata_size = par->extradata_size;
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uint8_t *tmpbuf = NULL;
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int ps_pos[3] = { 0 };
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static const char * const ps_names[3] = { "vps", "sps", "pps" };
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int num_arrays, num_nalus;
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int pos, i, j;
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// Convert to hvcc format. Since we need to group multiple NALUs of
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// the same type, and we might need to convert from one format to the
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// other anyway, we get away with a little less work by using the hvcc
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// format.
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if (par->extradata[0] != 1) {
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AVIOContext *pb;
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if (avio_open_dyn_buf(&pb) < 0)
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return NULL;
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if (ff_isom_write_hvcc(pb, par->extradata, par->extradata_size, 0) < 0) {
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avio_close_dyn_buf(pb, &tmpbuf);
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goto err;
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}
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extradata_size = avio_close_dyn_buf(pb, &extradata);
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tmpbuf = extradata;
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}
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if (extradata_size < 23)
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goto err;
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num_arrays = extradata[22];
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pos = 23;
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for (i = 0; i < num_arrays; i++) {
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int num_nalus, nalu_type;
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if (pos + 3 > extradata_size)
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goto err;
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nalu_type = extradata[pos] & 0x3f;
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// Not including libavcodec/hevc.h to avoid confusion between
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// NAL_* with the same name for both H.264 and HEVC.
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if (nalu_type == 32) // VPS
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ps_pos[0] = pos;
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else if (nalu_type == 33) // SPS
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ps_pos[1] = pos;
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else if (nalu_type == 34) // PPS
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ps_pos[2] = pos;
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num_nalus = AV_RB16(&extradata[pos + 1]);
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pos += 3;
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for (j = 0; j < num_nalus; j++) {
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int len;
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if (pos + 2 > extradata_size)
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goto err;
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len = AV_RB16(&extradata[pos]);
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pos += 2;
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if (pos + len > extradata_size)
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goto err;
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pos += len;
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}
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}
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if (!ps_pos[0] || !ps_pos[1] || !ps_pos[2])
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goto err;
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psets = av_mallocz(MAX_PSET_SIZE);
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if (!psets)
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goto err;
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psets[0] = '\0';
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for (i = 0; i < 3; i++) {
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pos = ps_pos[i];
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if (i > 0)
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av_strlcat(psets, "; ", MAX_PSET_SIZE);
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av_strlcatf(psets, MAX_PSET_SIZE, "sprop-%s=", ps_names[i]);
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// Skipping boundary checks in the input here; we've already traversed
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// the whole hvcc structure above without issues
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num_nalus = AV_RB16(&extradata[pos + 1]);
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pos += 3;
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for (j = 0; j < num_nalus; j++) {
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int len = AV_RB16(&extradata[pos]);
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int strpos;
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pos += 2;
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if (j > 0)
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av_strlcat(psets, ",", MAX_PSET_SIZE);
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strpos = strlen(psets);
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if (!av_base64_encode(psets + strpos, MAX_PSET_SIZE - strpos,
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&extradata[pos], len)) {
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av_free(psets);
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goto err;
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}
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pos += len;
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}
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}
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av_free(tmpbuf);
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return psets;
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err:
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av_free(tmpbuf);
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return NULL;
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}
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static char *extradata2config(AVFormatContext *s, AVCodecParameters *par)
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{
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char *config;
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if (par->extradata_size > MAX_EXTRADATA_SIZE) {
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av_log(s, AV_LOG_ERROR, "Too much extradata!\n");
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return NULL;
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}
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config = av_malloc(10 + par->extradata_size * 2);
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if (!config) {
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av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
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return NULL;
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}
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memcpy(config, "; config=", 9);
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ff_data_to_hex(config + 9, par->extradata, par->extradata_size, 0);
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config[9 + par->extradata_size * 2] = 0;
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return config;
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}
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static char *xiph_extradata2config(AVFormatContext *s, AVCodecParameters *par)
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{
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uint8_t *config;
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char *encoded_config;
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const uint8_t *header_start[3];
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int headers_len, header_len[3], config_len;
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int first_header_size;
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switch (par->codec_id) {
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case AV_CODEC_ID_THEORA:
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first_header_size = 42;
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break;
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case AV_CODEC_ID_VORBIS:
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first_header_size = 30;
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break;
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default:
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av_log(s, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
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return NULL;
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}
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if (avpriv_split_xiph_headers(par->extradata, par->extradata_size,
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first_header_size, header_start,
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header_len) < 0) {
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av_log(s, AV_LOG_ERROR, "Extradata corrupt.\n");
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return NULL;
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}
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headers_len = header_len[0] + header_len[2];
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config_len = 4 + // count
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3 + // ident
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2 + // packet size
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1 + // header count
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2 + // header size
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headers_len; // and the rest
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config = av_malloc(config_len);
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if (!config)
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goto xiph_fail;
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encoded_config = av_malloc(AV_BASE64_SIZE(config_len));
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if (!encoded_config) {
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av_free(config);
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goto xiph_fail;
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}
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config[0] = config[1] = config[2] = 0;
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config[3] = 1;
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config[4] = (RTP_XIPH_IDENT >> 16) & 0xff;
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config[5] = (RTP_XIPH_IDENT >> 8) & 0xff;
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config[6] = (RTP_XIPH_IDENT ) & 0xff;
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config[7] = (headers_len >> 8) & 0xff;
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config[8] = headers_len & 0xff;
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config[9] = 2;
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config[10] = header_len[0];
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config[11] = 0; // size of comment header; nonexistent
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memcpy(config + 12, header_start[0], header_len[0]);
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memcpy(config + 12 + header_len[0], header_start[2], header_len[2]);
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av_base64_encode(encoded_config, AV_BASE64_SIZE(config_len),
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config, config_len);
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av_free(config);
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return encoded_config;
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xiph_fail:
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av_log(s, AV_LOG_ERROR,
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"Not enough memory for configuration string\n");
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return NULL;
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}
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static int latm_context2profilelevel(AVCodecParameters *par)
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{
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/* MP4A-LATM
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* The RTP payload format specification is described in RFC 3016
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* The encoding specifications are provided in ISO/IEC 14496-3 */
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int profile_level = 0x2B;
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/* TODO: AAC Profile only supports AAC LC Object Type.
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* Different Object Types should implement different Profile Levels */
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if (par->sample_rate <= 24000) {
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if (par->channels <= 2)
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profile_level = 0x28; // AAC Profile, Level 1
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} else if (par->sample_rate <= 48000) {
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if (par->channels <= 2) {
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profile_level = 0x29; // AAC Profile, Level 2
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} else if (par->channels <= 5) {
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profile_level = 0x2A; // AAC Profile, Level 4
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}
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} else if (par->sample_rate <= 96000) {
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if (par->channels <= 5) {
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profile_level = 0x2B; // AAC Profile, Level 5
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}
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}
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return profile_level;
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}
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static char *latm_context2config(AVFormatContext *s, AVCodecParameters *par)
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{
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/* MP4A-LATM
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* The RTP payload format specification is described in RFC 3016
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* The encoding specifications are provided in ISO/IEC 14496-3 */
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uint8_t config_byte[6];
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int rate_index;
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char *config;
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for (rate_index = 0; rate_index < 16; rate_index++)
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if (avpriv_mpeg4audio_sample_rates[rate_index] == par->sample_rate)
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break;
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if (rate_index == 16) {
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av_log(s, AV_LOG_ERROR, "Unsupported sample rate\n");
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return NULL;
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}
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config_byte[0] = 0x40;
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config_byte[1] = 0;
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config_byte[2] = 0x20 | rate_index;
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config_byte[3] = par->channels << 4;
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config_byte[4] = 0x3f;
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config_byte[5] = 0xc0;
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config = av_malloc(6*2+1);
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if (!config) {
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av_log(s, AV_LOG_ERROR, "Cannot allocate memory for the config info.\n");
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return NULL;
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}
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ff_data_to_hex(config, config_byte, 6, 1);
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config[12] = 0;
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return config;
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}
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static char *sdp_write_media_attributes(char *buff, int size, AVStream *st, int payload_type, AVFormatContext *fmt)
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{
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char *config = NULL;
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AVCodecParameters *p = st->codecpar;
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switch (p->codec_id) {
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case AV_CODEC_ID_DIRAC:
|
|
av_strlcatf(buff, size, "a=rtpmap:%d VC2/90000\r\n", payload_type);
|
|
break;
|
|
case AV_CODEC_ID_H264: {
|
|
int mode = 1;
|
|
if (fmt && fmt->oformat && fmt->oformat->priv_class &&
|
|
av_opt_flag_is_set(fmt->priv_data, "rtpflags", "h264_mode0"))
|
|
mode = 0;
|
|
if (p->extradata_size) {
|
|
config = extradata2psets(fmt, p);
|
|
}
|
|
av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
|
|
"a=fmtp:%d packetization-mode=%d%s\r\n",
|
|
payload_type,
|
|
payload_type, mode, config ? config : "");
|
|
break;
|
|
}
|
|
case AV_CODEC_ID_H261:
|
|
{
|
|
const char *pic_fmt = NULL;
|
|
/* only QCIF and CIF are specified as supported in RFC 4587 */
|
|
if (p->width == 176 && p->height == 144)
|
|
pic_fmt = "QCIF=1";
|
|
else if (p->width == 352 && p->height == 288)
|
|
pic_fmt = "CIF=1";
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d H261/90000\r\n", payload_type);
|
|
if (pic_fmt)
|
|
av_strlcatf(buff, size, "a=fmtp:%d %s\r\n", payload_type, pic_fmt);
|
|
break;
|
|
}
|
|
case AV_CODEC_ID_H263:
|
|
case AV_CODEC_ID_H263P:
|
|
/* a=framesize is required by 3GPP TS 26.234 (PSS). It
|
|
* actually specifies the maximum video size, but we only know
|
|
* the current size. This is required for playback on Android
|
|
* stagefright and on Samsung bada. */
|
|
if (!fmt || !fmt->oformat->priv_class ||
|
|
!av_opt_flag_is_set(fmt->priv_data, "rtpflags", "rfc2190") ||
|
|
p->codec_id == AV_CODEC_ID_H263P)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
|
|
"a=framesize:%d %d-%d\r\n",
|
|
payload_type,
|
|
payload_type, p->width, p->height);
|
|
break;
|
|
case AV_CODEC_ID_HEVC:
|
|
if (p->extradata_size)
|
|
config = extradata2psets_hevc(p);
|
|
av_strlcatf(buff, size, "a=rtpmap:%d H265/90000\r\n", payload_type);
|
|
if (config)
|
|
av_strlcatf(buff, size, "a=fmtp:%d %s\r\n",
|
|
payload_type, config);
|
|
break;
|
|
case AV_CODEC_ID_MPEG4:
|
|
if (p->extradata_size) {
|
|
config = extradata2config(fmt, p);
|
|
}
|
|
av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
|
|
"a=fmtp:%d profile-level-id=1%s\r\n",
|
|
payload_type,
|
|
payload_type, config ? config : "");
|
|
break;
|
|
case AV_CODEC_ID_AAC:
|
|
if (fmt && fmt->oformat && fmt->oformat->priv_class &&
|
|
av_opt_flag_is_set(fmt->priv_data, "rtpflags", "latm")) {
|
|
config = latm_context2config(fmt, p);
|
|
if (!config)
|
|
return NULL;
|
|
av_strlcatf(buff, size, "a=rtpmap:%d MP4A-LATM/%d/%d\r\n"
|
|
"a=fmtp:%d profile-level-id=%d;cpresent=0;config=%s\r\n",
|
|
payload_type, p->sample_rate, p->channels,
|
|
payload_type, latm_context2profilelevel(p), config);
|
|
} else {
|
|
if (p->extradata_size) {
|
|
config = extradata2config(fmt, p);
|
|
} else {
|
|
/* FIXME: maybe we can forge config information based on the
|
|
* codec parameters...
|
|
*/
|
|
av_log(fmt, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
|
|
return NULL;
|
|
}
|
|
if (!config) {
|
|
return NULL;
|
|
}
|
|
av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
|
|
"a=fmtp:%d profile-level-id=1;"
|
|
"mode=AAC-hbr;sizelength=13;indexlength=3;"
|
|
"indexdeltalength=3%s\r\n",
|
|
payload_type, p->sample_rate, p->channels,
|
|
payload_type, config);
|
|
}
|
|
break;
|
|
case AV_CODEC_ID_PCM_S16BE:
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
|
|
payload_type,
|
|
p->sample_rate, p->channels);
|
|
break;
|
|
case AV_CODEC_ID_PCM_S24BE:
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d L24/%d/%d\r\n",
|
|
payload_type,
|
|
p->sample_rate, p->channels);
|
|
break;
|
|
case AV_CODEC_ID_PCM_MULAW:
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
|
|
payload_type,
|
|
p->sample_rate, p->channels);
|
|
break;
|
|
case AV_CODEC_ID_PCM_ALAW:
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
|
|
payload_type,
|
|
p->sample_rate, p->channels);
|
|
break;
|
|
case AV_CODEC_ID_AMR_NB:
|
|
av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
|
|
"a=fmtp:%d octet-align=1\r\n",
|
|
payload_type, p->sample_rate, p->channels,
|
|
payload_type);
|
|
break;
|
|
case AV_CODEC_ID_AMR_WB:
|
|
av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
|
|
"a=fmtp:%d octet-align=1\r\n",
|
|
payload_type, p->sample_rate, p->channels,
|
|
payload_type);
|
|
break;
|
|
case AV_CODEC_ID_VORBIS:
|
|
if (p->extradata_size)
|
|
config = xiph_extradata2config(fmt, p);
|
|
else
|
|
av_log(fmt, AV_LOG_ERROR, "Vorbis configuration info missing\n");
|
|
if (!config)
|
|
return NULL;
|
|
|
|
av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
|
|
"a=fmtp:%d configuration=%s\r\n",
|
|
payload_type, p->sample_rate, p->channels,
|
|
payload_type, config);
|
|
break;
|
|
case AV_CODEC_ID_THEORA: {
|
|
const char *pix_fmt;
|
|
switch (p->format) {
|
|
case AV_PIX_FMT_YUV420P:
|
|
pix_fmt = "YCbCr-4:2:0";
|
|
break;
|
|
case AV_PIX_FMT_YUV422P:
|
|
pix_fmt = "YCbCr-4:2:2";
|
|
break;
|
|
case AV_PIX_FMT_YUV444P:
|
|
pix_fmt = "YCbCr-4:4:4";
|
|
break;
|
|
default:
|
|
av_log(fmt, AV_LOG_ERROR, "Unsupported pixel format.\n");
|
|
return NULL;
|
|
}
|
|
|
|
if (p->extradata_size)
|
|
config = xiph_extradata2config(fmt, p);
|
|
else
|
|
av_log(fmt, AV_LOG_ERROR, "Theora configuration info missing\n");
|
|
if (!config)
|
|
return NULL;
|
|
|
|
av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
|
|
"a=fmtp:%d delivery-method=inline; "
|
|
"width=%d; height=%d; sampling=%s; "
|
|
"configuration=%s\r\n",
|
|
payload_type, payload_type,
|
|
p->width, p->height, pix_fmt, config);
|
|
break;
|
|
}
|
|
case AV_CODEC_ID_VP8:
|
|
av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
|
|
payload_type);
|
|
break;
|
|
case AV_CODEC_ID_VP9:
|
|
av_strlcatf(buff, size, "a=rtpmap:%d VP9/90000\r\n",
|
|
payload_type);
|
|
break;
|
|
case AV_CODEC_ID_MJPEG:
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d JPEG/90000\r\n",
|
|
payload_type);
|
|
break;
|
|
case AV_CODEC_ID_ADPCM_G722:
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
|
|
payload_type,
|
|
8000, p->channels);
|
|
break;
|
|
case AV_CODEC_ID_ADPCM_G726: {
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d AAL2-G726-%d/%d\r\n",
|
|
payload_type,
|
|
p->bits_per_coded_sample*8,
|
|
p->sample_rate);
|
|
break;
|
|
}
|
|
case AV_CODEC_ID_ADPCM_G726LE: {
|
|
if (payload_type >= RTP_PT_PRIVATE)
|
|
av_strlcatf(buff, size, "a=rtpmap:%d G726-%d/%d\r\n",
|
|
payload_type,
|
|
p->bits_per_coded_sample*8,
|
|
p->sample_rate);
|
|
break;
|
|
}
|
|
case AV_CODEC_ID_ILBC:
|
|
av_strlcatf(buff, size, "a=rtpmap:%d iLBC/%d\r\n"
|
|
"a=fmtp:%d mode=%d\r\n",
|
|
payload_type, p->sample_rate,
|
|
payload_type, p->block_align == 38 ? 20 : 30);
|
|
break;
|
|
case AV_CODEC_ID_SPEEX:
|
|
av_strlcatf(buff, size, "a=rtpmap:%d speex/%d\r\n",
|
|
payload_type, p->sample_rate);
|
|
if (st->codec) {
|
|
const char *mode;
|
|
uint64_t vad_option;
|
|
|
|
if (st->codec->flags & AV_CODEC_FLAG_QSCALE)
|
|
mode = "on";
|
|
else if (!av_opt_get_int(st->codec, "vad", AV_OPT_FLAG_ENCODING_PARAM, &vad_option) && vad_option)
|
|
mode = "vad";
|
|
else
|
|
mode = "off";
|
|
|
|
av_strlcatf(buff, size, "a=fmtp:%d vbr=%s\r\n",
|
|
payload_type, mode);
|
|
}
|
|
break;
|
|
case AV_CODEC_ID_OPUS:
|
|
/* The opus RTP draft says that all opus streams MUST be declared
|
|
as stereo, to avoid negotiation failures. The actual number of
|
|
channels can change on a packet-by-packet basis. The number of
|
|
channels a receiver prefers to receive or a sender plans to send
|
|
can be declared via fmtp parameters (both default to mono), but
|
|
receivers MUST be able to receive and process stereo packets. */
|
|
av_strlcatf(buff, size, "a=rtpmap:%d opus/48000/2\r\n",
|
|
payload_type);
|
|
if (p->channels == 2) {
|
|
av_strlcatf(buff, size, "a=fmtp:%d sprop-stereo=1\r\n",
|
|
payload_type);
|
|
}
|
|
break;
|
|
default:
|
|
/* Nothing special to do here... */
|
|
break;
|
|
}
|
|
|
|
av_free(config);
|
|
|
|
return buff;
|
|
}
|
|
|
|
void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
|
|
const char *dest_addr, const char *dest_type,
|
|
int port, int ttl, AVFormatContext *fmt)
|
|
{
|
|
AVCodecParameters *p = st->codecpar;
|
|
const char *type;
|
|
int payload_type;
|
|
|
|
payload_type = ff_rtp_get_payload_type(fmt, st->codecpar, idx);
|
|
|
|
switch (p->codec_type) {
|
|
case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
|
|
case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
|
|
case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
|
|
default : type = "application"; break;
|
|
}
|
|
|
|
av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
|
|
sdp_write_address(buff, size, dest_addr, dest_type, ttl);
|
|
if (p->bit_rate) {
|
|
av_strlcatf(buff, size, "b=AS:%"PRId64"\r\n", p->bit_rate / 1000);
|
|
}
|
|
|
|
sdp_write_media_attributes(buff, size, st, payload_type, fmt);
|
|
}
|
|
|
|
int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
|
|
{
|
|
AVDictionaryEntry *title = av_dict_get(ac[0]->metadata, "title", NULL, 0);
|
|
struct sdp_session_level s = { 0 };
|
|
int i, j, port, ttl, is_multicast, index = 0;
|
|
char dst[32], dst_type[5];
|
|
|
|
memset(buf, 0, size);
|
|
s.user = "-";
|
|
s.src_addr = "127.0.0.1"; /* FIXME: Properly set this */
|
|
s.src_type = "IP4";
|
|
s.name = title ? title->value : "No Name";
|
|
|
|
port = 0;
|
|
ttl = 0;
|
|
if (n_files == 1) {
|
|
port = sdp_get_address(dst, sizeof(dst), &ttl, ac[0]->url ? ac[0]->url : "");
|
|
is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
|
|
sizeof(dst_type));
|
|
if (!is_multicast)
|
|
ttl = 0;
|
|
if (dst[0]) {
|
|
s.dst_addr = dst;
|
|
s.dst_type = dst_type;
|
|
s.ttl = ttl;
|
|
if (!strcmp(dst_type, "IP6")) {
|
|
s.src_addr = "::1";
|
|
s.src_type = "IP6";
|
|
}
|
|
}
|
|
}
|
|
sdp_write_header(buf, size, &s);
|
|
|
|
dst[0] = 0;
|
|
for (i = 0; i < n_files; i++) {
|
|
if (n_files != 1) {
|
|
port = sdp_get_address(dst, sizeof(dst), &ttl, ac[i]->url ? ac[i]->url : "");
|
|
is_multicast = resolve_destination(dst, sizeof(dst), dst_type,
|
|
sizeof(dst_type));
|
|
if (!is_multicast)
|
|
ttl = 0;
|
|
}
|
|
for (j = 0; j < ac[i]->nb_streams; j++) {
|
|
ff_sdp_write_media(buf, size, ac[i]->streams[j], index++,
|
|
dst[0] ? dst : NULL, dst_type,
|
|
(port > 0) ? port + j * 2 : 0,
|
|
ttl, ac[i]);
|
|
if (port <= 0) {
|
|
av_strlcatf(buf, size,
|
|
"a=control:streamid=%d\r\n", i + j);
|
|
}
|
|
if (ac[i]->pb && ac[i]->pb->av_class) {
|
|
uint8_t *crypto_suite = NULL, *crypto_params = NULL;
|
|
av_opt_get(ac[i]->pb, "srtp_out_suite", AV_OPT_SEARCH_CHILDREN,
|
|
&crypto_suite);
|
|
av_opt_get(ac[i]->pb, "srtp_out_params", AV_OPT_SEARCH_CHILDREN,
|
|
&crypto_params);
|
|
if (crypto_suite && crypto_suite[0])
|
|
av_strlcatf(buf, size,
|
|
"a=crypto:1 %s inline:%s\r\n",
|
|
crypto_suite, crypto_params);
|
|
av_free(crypto_suite);
|
|
av_free(crypto_params);
|
|
}
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
#else
|
|
int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
|
|
{
|
|
return AVERROR(ENOSYS);
|
|
}
|
|
|
|
void ff_sdp_write_media(char *buff, int size, AVStream *st, int idx,
|
|
const char *dest_addr, const char *dest_type,
|
|
int port, int ttl, AVFormatContext *fmt)
|
|
{
|
|
}
|
|
#endif
|