mirror of https://git.ffmpeg.org/ffmpeg.git
550 lines
19 KiB
C
550 lines
19 KiB
C
/*
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* copyright (c) 2007 Luca Abeni
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*
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* This file is part of Libav.
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*
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* Libav 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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* Libav 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 Libav; 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/parseutils.h"
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#include "libavcodec/xiph.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 "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, *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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memset(&hints, 0, sizeof(hints));
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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")) {
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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(AVCodecContext *c)
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{
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char *psets, *p;
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const uint8_t *r;
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const char *pset_string = "; sprop-parameter-sets=";
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if (c->extradata_size > MAX_EXTRADATA_SIZE) {
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av_log(c, AV_LOG_ERROR, "Too much extradata!\n");
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return NULL;
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}
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if (c->extradata[0] == 1) {
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uint8_t *dummy_p;
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int dummy_int;
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AVBitStreamFilterContext *bsfc= av_bitstream_filter_init("h264_mp4toannexb");
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if (!bsfc) {
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av_log(c, AV_LOG_ERROR, "Cannot open the h264_mp4toannexb BSF!\n");
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return NULL;
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}
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av_bitstream_filter_filter(bsfc, c, NULL, &dummy_p, &dummy_int, NULL, 0, 0);
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av_bitstream_filter_close(bsfc);
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}
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psets = av_mallocz(MAX_PSET_SIZE);
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if (psets == NULL) {
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av_log(c, AV_LOG_ERROR, "Cannot allocate memory for the parameter sets.\n");
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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(c->extradata, c->extradata + c->extradata_size);
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while (r < c->extradata + c->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, c->extradata + c->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 (av_base64_encode(p, MAX_PSET_SIZE - (p - psets), r, r1 - r) == NULL) {
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av_log(c, AV_LOG_ERROR, "Cannot Base64-encode %td %td!\n", MAX_PSET_SIZE - (p - psets), r1 - r);
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av_free(psets);
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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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return psets;
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}
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static char *extradata2config(AVCodecContext *c)
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{
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char *config;
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if (c->extradata_size > MAX_EXTRADATA_SIZE) {
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av_log(c, 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 + c->extradata_size * 2);
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if (config == NULL) {
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av_log(c, 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, c->extradata, c->extradata_size, 0);
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config[9 + c->extradata_size * 2] = 0;
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return config;
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}
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static char *xiph_extradata2config(AVCodecContext *c)
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{
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char *config, *encoded_config;
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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 (c->codec_id) {
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case CODEC_ID_THEORA:
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first_header_size = 42;
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break;
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case 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(c, AV_LOG_ERROR, "Unsupported Xiph codec ID\n");
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return NULL;
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}
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if (ff_split_xiph_headers(c->extradata, c->extradata_size,
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first_header_size, header_start,
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header_len) < 0) {
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av_log(c, 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(c, 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 char *sdp_write_media_attributes(char *buff, int size, AVCodecContext *c, int payload_type)
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{
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char *config = NULL;
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switch (c->codec_id) {
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case CODEC_ID_H264:
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if (c->extradata_size) {
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config = extradata2psets(c);
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}
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av_strlcatf(buff, size, "a=rtpmap:%d H264/90000\r\n"
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"a=fmtp:%d packetization-mode=1%s\r\n",
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payload_type,
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payload_type, config ? config : "");
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break;
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case CODEC_ID_H263:
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case CODEC_ID_H263P:
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/* a=framesize is required by 3GPP TS 26.234 (PSS). It
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* actually specifies the maximum video size, but we only know
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* the current size. This is required for playback on Android
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* stagefright and on Samsung bada. */
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av_strlcatf(buff, size, "a=rtpmap:%d H263-2000/90000\r\n"
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"a=framesize:%d %d-%d\r\n",
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payload_type,
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payload_type, c->width, c->height);
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break;
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case CODEC_ID_MPEG4:
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if (c->extradata_size) {
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config = extradata2config(c);
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}
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av_strlcatf(buff, size, "a=rtpmap:%d MP4V-ES/90000\r\n"
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"a=fmtp:%d profile-level-id=1%s\r\n",
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payload_type,
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payload_type, config ? config : "");
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break;
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case CODEC_ID_AAC:
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if (c->extradata_size) {
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config = extradata2config(c);
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} else {
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/* FIXME: maybe we can forge config information based on the
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* codec parameters...
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*/
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av_log(c, AV_LOG_ERROR, "AAC with no global headers is currently not supported.\n");
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return NULL;
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}
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if (config == NULL) {
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return NULL;
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}
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av_strlcatf(buff, size, "a=rtpmap:%d MPEG4-GENERIC/%d/%d\r\n"
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"a=fmtp:%d profile-level-id=1;"
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"mode=AAC-hbr;sizelength=13;indexlength=3;"
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"indexdeltalength=3%s\r\n",
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payload_type, c->sample_rate, c->channels,
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payload_type, config);
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break;
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case CODEC_ID_PCM_S16BE:
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if (payload_type >= RTP_PT_PRIVATE)
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av_strlcatf(buff, size, "a=rtpmap:%d L16/%d/%d\r\n",
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payload_type,
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c->sample_rate, c->channels);
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break;
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case CODEC_ID_PCM_MULAW:
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if (payload_type >= RTP_PT_PRIVATE)
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av_strlcatf(buff, size, "a=rtpmap:%d PCMU/%d/%d\r\n",
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payload_type,
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c->sample_rate, c->channels);
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break;
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case CODEC_ID_PCM_ALAW:
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if (payload_type >= RTP_PT_PRIVATE)
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av_strlcatf(buff, size, "a=rtpmap:%d PCMA/%d/%d\r\n",
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payload_type,
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c->sample_rate, c->channels);
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break;
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case CODEC_ID_AMR_NB:
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av_strlcatf(buff, size, "a=rtpmap:%d AMR/%d/%d\r\n"
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"a=fmtp:%d octet-align=1\r\n",
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payload_type, c->sample_rate, c->channels,
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payload_type);
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break;
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case CODEC_ID_AMR_WB:
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av_strlcatf(buff, size, "a=rtpmap:%d AMR-WB/%d/%d\r\n"
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"a=fmtp:%d octet-align=1\r\n",
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payload_type, c->sample_rate, c->channels,
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payload_type);
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break;
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case CODEC_ID_VORBIS:
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if (c->extradata_size)
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config = xiph_extradata2config(c);
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else
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av_log(c, AV_LOG_ERROR, "Vorbis configuration info missing\n");
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if (!config)
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return NULL;
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av_strlcatf(buff, size, "a=rtpmap:%d vorbis/%d/%d\r\n"
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"a=fmtp:%d configuration=%s\r\n",
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payload_type, c->sample_rate, c->channels,
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payload_type, config);
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break;
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case CODEC_ID_THEORA: {
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const char *pix_fmt;
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if (c->extradata_size)
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config = xiph_extradata2config(c);
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else
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av_log(c, AV_LOG_ERROR, "Theora configuation info missing\n");
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if (!config)
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return NULL;
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switch (c->pix_fmt) {
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case PIX_FMT_YUV420P:
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pix_fmt = "YCbCr-4:2:0";
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break;
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case PIX_FMT_YUV422P:
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pix_fmt = "YCbCr-4:2:2";
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break;
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case PIX_FMT_YUV444P:
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pix_fmt = "YCbCr-4:4:4";
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break;
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default:
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av_log(c, AV_LOG_ERROR, "Unsupported pixel format.\n");
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return NULL;
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}
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av_strlcatf(buff, size, "a=rtpmap:%d theora/90000\r\n"
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"a=fmtp:%d delivery-method=inline; "
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"width=%d; height=%d; sampling=%s; "
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"configuration=%s\r\n",
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payload_type, payload_type,
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c->width, c->height, pix_fmt, config);
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break;
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}
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case CODEC_ID_VP8:
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av_strlcatf(buff, size, "a=rtpmap:%d VP8/90000\r\n",
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payload_type);
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break;
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case CODEC_ID_ADPCM_G722:
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if (payload_type >= RTP_PT_PRIVATE)
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av_strlcatf(buff, size, "a=rtpmap:%d G722/%d/%d\r\n",
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payload_type,
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8000, c->channels);
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break;
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default:
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/* Nothing special to do here... */
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break;
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}
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av_free(config);
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return buff;
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}
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void ff_sdp_write_media(char *buff, int size, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl)
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{
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const char *type;
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int payload_type;
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payload_type = ff_rtp_get_payload_type(c);
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if (payload_type < 0) {
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payload_type = RTP_PT_PRIVATE + (c->codec_type == AVMEDIA_TYPE_AUDIO);
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}
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switch (c->codec_type) {
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case AVMEDIA_TYPE_VIDEO : type = "video" ; break;
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case AVMEDIA_TYPE_AUDIO : type = "audio" ; break;
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case AVMEDIA_TYPE_SUBTITLE: type = "text" ; break;
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default : type = "application"; break;
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}
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av_strlcatf(buff, size, "m=%s %d RTP/AVP %d\r\n", type, port, payload_type);
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sdp_write_address(buff, size, dest_addr, dest_type, ttl);
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if (c->bit_rate) {
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av_strlcatf(buff, size, "b=AS:%d\r\n", c->bit_rate / 1000);
|
|
}
|
|
|
|
sdp_write_media_attributes(buff, size, c, payload_type);
|
|
}
|
|
|
|
int av_sdp_create(AVFormatContext *ac[], int n_files, char *buf, int size)
|
|
{
|
|
AVMetadataTag *title = av_metadata_get(ac[0]->metadata, "title", NULL, 0);
|
|
struct sdp_session_level s;
|
|
int i, j, port, ttl, is_multicast;
|
|
char dst[32], dst_type[5];
|
|
|
|
memset(buf, 0, size);
|
|
memset(&s, 0, sizeof(struct sdp_session_level));
|
|
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]->filename);
|
|
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]->filename);
|
|
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]->codec, dst[0] ? dst : NULL,
|
|
dst_type, (port > 0) ? port + j * 2 : 0, ttl);
|
|
if (port <= 0) {
|
|
av_strlcatf(buf, size,
|
|
"a=control:streamid=%d\r\n", i + j);
|
|
}
|
|
}
|
|
}
|
|
|
|
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, AVCodecContext *c, const char *dest_addr, const char *dest_type, int port, int ttl)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
#if FF_API_SDP_CREATE
|
|
int avf_sdp_create(AVFormatContext *ac[], int n_files, char *buff, int size)
|
|
{
|
|
return av_sdp_create(ac, n_files, buff, size);
|
|
}
|
|
#endif
|