ffmpeg / libavformat / rtsp.c @ 5509bffa
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/*
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* RTSP/SDP client
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* Copyright (c) 2002 Fabrice Bellard.
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*
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* This library 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 of the License, or (at your option) any later version.
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*
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* This library 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 this library; 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 "avformat.h" |
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#include <unistd.h> /* for select() prototype */ |
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#include <sys/time.h> |
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#include <netinet/in.h> |
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#include <sys/socket.h> |
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#ifndef __BEOS__
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# include <arpa/inet.h> |
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#else
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# include "barpainet.h" |
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#endif
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//#define DEBUG
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//#define DEBUG_RTP_TCP
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enum RTSPClientState {
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RTSP_STATE_IDLE, |
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RTSP_STATE_PLAYING, |
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RTSP_STATE_PAUSED, |
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}; |
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typedef struct RTSPState { |
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URLContext *rtsp_hd; /* RTSP TCP connexion handle */
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int nb_rtsp_streams;
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struct RTSPStream **rtsp_streams;
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enum RTSPClientState state;
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int64_t seek_timestamp; |
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/* XXX: currently we use unbuffered input */
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// ByteIOContext rtsp_gb;
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int seq; /* RTSP command sequence number */ |
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char session_id[512]; |
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enum RTSPProtocol protocol;
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char last_reply[2048]; /* XXX: allocate ? */ |
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RTPDemuxContext *cur_rtp; |
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} RTSPState; |
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typedef struct RTSPStream { |
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URLContext *rtp_handle; /* RTP stream handle */
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RTPDemuxContext *rtp_ctx; /* RTP parse context */
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int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */ |
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int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */ |
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char control_url[1024]; /* url for this stream (from SDP) */ |
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int sdp_port; /* port (from SDP content - not used in RTSP) */ |
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struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */ |
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int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */ |
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int sdp_payload_type; /* payload type - only used in SDP */ |
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rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */
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} RTSPStream; |
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static int rtsp_read_play(AVFormatContext *s); |
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/* XXX: currently, the only way to change the protocols consists in
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changing this variable */
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int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP); |
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FFRTSPCallback *ff_rtsp_callback = NULL;
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static int rtsp_probe(AVProbeData *p) |
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{
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if (strstart(p->filename, "rtsp:", NULL)) |
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return AVPROBE_SCORE_MAX;
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return 0; |
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} |
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static int redir_isspace(int c) |
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{
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return (c == ' ' || c == '\t' || c == '\n' || c == '\r'); |
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} |
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static void skip_spaces(const char **pp) |
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{
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const char *p; |
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p = *pp; |
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while (redir_isspace(*p))
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p++; |
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*pp = p; |
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} |
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static void get_word_sep(char *buf, int buf_size, const char *sep, |
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const char **pp) |
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{
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const char *p; |
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char *q;
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p = *pp; |
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if (*p == '/') |
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p++; |
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skip_spaces(&p); |
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q = buf; |
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while (!strchr(sep, *p) && *p != '\0') { |
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if ((q - buf) < buf_size - 1) |
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*q++ = *p; |
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p++; |
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} |
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if (buf_size > 0) |
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*q = '\0';
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*pp = p; |
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} |
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static void get_word(char *buf, int buf_size, const char **pp) |
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{
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const char *p; |
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char *q;
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p = *pp; |
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skip_spaces(&p); |
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q = buf; |
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while (!redir_isspace(*p) && *p != '\0') { |
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if ((q - buf) < buf_size - 1) |
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*q++ = *p; |
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p++; |
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} |
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if (buf_size > 0) |
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*q = '\0';
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*pp = p; |
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} |
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/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other
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params>] */
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static int sdp_parse_rtpmap(AVCodecContext *codec, int payload_type, const char *p) |
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{
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char buf[256]; |
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int i;
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AVCodec *c; |
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char *c_name;
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/* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and
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see if we can handle this kind of payload */
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get_word_sep(buf, sizeof(buf), "/", &p); |
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if (payload_type >= RTP_PT_PRIVATE) {
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/* We are in dynmaic payload type case ... search into AVRtpDynamicPayloadTypes[] */
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for (i = 0; AVRtpDynamicPayloadTypes[i].codec_id != CODEC_ID_NONE; ++i) |
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if (!strcmp(buf, AVRtpDynamicPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpDynamicPayloadTypes[i].codec_type)) {
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codec->codec_id = AVRtpDynamicPayloadTypes[i].codec_id; |
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break;
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} |
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} else {
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/* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */
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/* search into AVRtpPayloadTypes[] */
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for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i) |
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if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){
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codec->codec_id = AVRtpPayloadTypes[i].codec_id; |
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break;
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} |
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} |
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c = avcodec_find_decoder(codec->codec_id); |
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if (c && c->name)
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c_name = (char *)c->name;
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else
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c_name = (char *)NULL; |
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if (c_name) {
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get_word_sep(buf, sizeof(buf), "/", &p); |
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i = atoi(buf); |
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switch (codec->codec_type) {
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case CODEC_TYPE_AUDIO:
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av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name);
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codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE; |
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codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS; |
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if (i > 0) { |
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codec->sample_rate = i; |
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get_word_sep(buf, sizeof(buf), "/", &p); |
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i = atoi(buf); |
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if (i > 0) |
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codec->channels = i; |
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} |
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av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate);
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av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels);
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break;
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case CODEC_TYPE_VIDEO:
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av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name);
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break;
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default:
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break;
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} |
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return 0; |
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} |
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return -1; |
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} |
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/* return the length and optionnaly the data */
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static int hex_to_data(uint8_t *data, const char *p) |
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{
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int c, len, v;
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len = 0;
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v = 1;
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for(;;) {
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skip_spaces(&p); |
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if (p == '\0') |
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break;
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c = toupper((unsigned char)*p++); |
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if (c >= '0' && c <= '9') |
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c = c - '0';
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else if (c >= 'A' && c <= 'F') |
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c = c - 'A' + 10; |
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else
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break;
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v = (v << 4) | c;
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if (v & 0x100) { |
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if (data)
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data[len] = v; |
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len++; |
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v = 1;
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} |
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} |
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return len;
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} |
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static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value) |
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{
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switch (codec->codec_id) {
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case CODEC_ID_MPEG4:
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case CODEC_ID_MPEG4AAC:
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if (!strcmp(attr, "config")) { |
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/* decode the hexa encoded parameter */
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int len = hex_to_data(NULL, value); |
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codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE); |
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if (!codec->extradata)
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return;
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codec->extradata_size = len; |
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hex_to_data(codec->extradata, value); |
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} |
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break;
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default:
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break;
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} |
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return;
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} |
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typedef struct attrname_map |
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{
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char *str;
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uint16_t type; |
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uint32_t offset; |
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} attrname_map_t; |
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/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */
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#define ATTR_NAME_TYPE_INT 0 |
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#define ATTR_NAME_TYPE_STR 1 |
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static attrname_map_t attr_names[]=
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{
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{"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)},
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{"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)},
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{"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)},
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{"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)},
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{"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)},
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{"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)},
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{NULL, -1, -1},
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}; |
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/* parse a SDP line and save stream attributes */
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static void sdp_parse_fmtp(AVStream *st, const char *p) |
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{
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char attr[256]; |
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char value[4096]; |
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int i;
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RTSPStream *rtsp_st = st->priv_data; |
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AVCodecContext *codec = st->codec; |
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rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data; |
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/* loop on each attribute */
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for(;;) {
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skip_spaces(&p); |
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if (*p == '\0') |
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break;
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get_word_sep(attr, sizeof(attr), "=", &p); |
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if (*p == '=') |
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p++; |
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get_word_sep(value, sizeof(value), ";", &p); |
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if (*p == ';') |
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p++; |
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/* grab the codec extra_data from the config parameter of the fmtp line */
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sdp_parse_fmtp_config(codec, attr, value); |
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/* Looking for a known attribute */
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for (i = 0; attr_names[i].str; ++i) { |
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if (!strcasecmp(attr, attr_names[i].str)) {
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if (attr_names[i].type == ATTR_NAME_TYPE_INT)
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*(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value); |
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else if (attr_names[i].type == ATTR_NAME_TYPE_STR) |
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*(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value); |
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} |
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} |
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} |
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} |
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typedef struct SDPParseState { |
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/* SDP only */
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struct in_addr default_ip;
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int default_ttl;
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} SDPParseState; |
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static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1, |
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int letter, const char *buf) |
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{
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RTSPState *rt = s->priv_data; |
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char buf1[64], st_type[64]; |
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const char *p; |
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int codec_type, payload_type, i;
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AVStream *st; |
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RTSPStream *rtsp_st; |
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struct in_addr sdp_ip;
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int ttl;
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#ifdef DEBUG
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printf("sdp: %c='%s'\n", letter, buf);
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#endif
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p = buf; |
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switch(letter) {
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case 'c': |
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get_word(buf1, sizeof(buf1), &p);
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if (strcmp(buf1, "IN") != 0) |
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return;
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get_word(buf1, sizeof(buf1), &p);
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if (strcmp(buf1, "IP4") != 0) |
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return;
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get_word_sep(buf1, sizeof(buf1), "/", &p); |
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if (inet_aton(buf1, &sdp_ip) == 0) |
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return;
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ttl = 16;
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if (*p == '/') { |
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p++; |
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get_word_sep(buf1, sizeof(buf1), "/", &p); |
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ttl = atoi(buf1); |
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} |
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if (s->nb_streams == 0) { |
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s1->default_ip = sdp_ip; |
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s1->default_ttl = ttl; |
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} else {
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st = s->streams[s->nb_streams - 1];
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rtsp_st = st->priv_data; |
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rtsp_st->sdp_ip = sdp_ip; |
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rtsp_st->sdp_ttl = ttl; |
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} |
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break;
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case 's': |
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pstrcpy(s->title, sizeof(s->title), p);
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break;
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case 'i': |
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if (s->nb_streams == 0) { |
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pstrcpy(s->comment, sizeof(s->comment), p);
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break;
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} |
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break;
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case 'm': |
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/* new stream */
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get_word(st_type, sizeof(st_type), &p);
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if (!strcmp(st_type, "audio")) { |
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codec_type = CODEC_TYPE_AUDIO; |
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} else if (!strcmp(st_type, "video")) { |
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codec_type = CODEC_TYPE_VIDEO; |
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} else {
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return;
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} |
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rtsp_st = av_mallocz(sizeof(RTSPStream));
|
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if (!rtsp_st)
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return;
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rtsp_st->stream_index = -1;
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dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st); |
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|
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rtsp_st->sdp_ip = s1->default_ip; |
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rtsp_st->sdp_ttl = s1->default_ttl; |
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|
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get_word(buf1, sizeof(buf1), &p); /* port */ |
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rtsp_st->sdp_port = atoi(buf1); |
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|
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get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */ |
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|
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/* XXX: handle list of formats */
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get_word(buf1, sizeof(buf1), &p); /* format list */ |
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rtsp_st->sdp_payload_type = atoi(buf1); |
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|
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if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) { |
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/* no corresponding stream */
|
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} else {
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st = av_new_stream(s, 0);
|
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if (!st)
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return;
|
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st->priv_data = rtsp_st; |
| 407 |
rtsp_st->stream_index = st->index; |
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st->codec->codec_type = codec_type; |
| 409 |
if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) {
|
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/* if standard payload type, we can find the codec right now */
|
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rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type); |
| 412 |
} |
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} |
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/* put a default control url */
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pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename);
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break;
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case 'a': |
| 418 |
if (strstart(p, "control:", &p) && s->nb_streams > 0) { |
| 419 |
char proto[32]; |
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/* get the control url */
|
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st = s->streams[s->nb_streams - 1];
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rtsp_st = st->priv_data; |
| 423 |
|
| 424 |
/* XXX: may need to add full url resolution */
|
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url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p); |
| 426 |
if (proto[0] == '\0') { |
| 427 |
/* relative control URL */
|
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pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/"); |
| 429 |
pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
|
| 430 |
} else {
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pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p);
|
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} |
| 433 |
} else if (strstart(p, "rtpmap:", &p)) { |
| 434 |
/* NOTE: rtpmap is only supported AFTER the 'm=' tag */
|
| 435 |
get_word(buf1, sizeof(buf1), &p);
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payload_type = atoi(buf1); |
| 437 |
for(i = 0; i < s->nb_streams;i++) { |
| 438 |
st = s->streams[i]; |
| 439 |
rtsp_st = st->priv_data; |
| 440 |
if (rtsp_st->sdp_payload_type == payload_type) {
|
| 441 |
sdp_parse_rtpmap(st->codec, payload_type, p); |
| 442 |
} |
| 443 |
} |
| 444 |
} else if (strstart(p, "fmtp:", &p)) { |
| 445 |
/* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */
|
| 446 |
get_word(buf1, sizeof(buf1), &p);
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payload_type = atoi(buf1); |
| 448 |
for(i = 0; i < s->nb_streams;i++) { |
| 449 |
st = s->streams[i]; |
| 450 |
rtsp_st = st->priv_data; |
| 451 |
if (rtsp_st->sdp_payload_type == payload_type) {
|
| 452 |
sdp_parse_fmtp(st, p); |
| 453 |
} |
| 454 |
} |
| 455 |
} |
| 456 |
break;
|
| 457 |
} |
| 458 |
} |
| 459 |
|
| 460 |
static int sdp_parse(AVFormatContext *s, const char *content) |
| 461 |
{
|
| 462 |
const char *p; |
| 463 |
int letter;
|
| 464 |
char buf[1024], *q; |
| 465 |
SDPParseState sdp_parse_state, *s1 = &sdp_parse_state; |
| 466 |
|
| 467 |
memset(s1, 0, sizeof(SDPParseState)); |
| 468 |
p = content; |
| 469 |
for(;;) {
|
| 470 |
skip_spaces(&p); |
| 471 |
letter = *p; |
| 472 |
if (letter == '\0') |
| 473 |
break;
|
| 474 |
p++; |
| 475 |
if (*p != '=') |
| 476 |
goto next_line;
|
| 477 |
p++; |
| 478 |
/* get the content */
|
| 479 |
q = buf; |
| 480 |
while (*p != '\n' && *p != '\r' && *p != '\0') { |
| 481 |
if ((q - buf) < sizeof(buf) - 1) |
| 482 |
*q++ = *p; |
| 483 |
p++; |
| 484 |
} |
| 485 |
*q = '\0';
|
| 486 |
sdp_parse_line(s, s1, letter, buf); |
| 487 |
next_line:
|
| 488 |
while (*p != '\n' && *p != '\0') |
| 489 |
p++; |
| 490 |
if (*p == '\n') |
| 491 |
p++; |
| 492 |
} |
| 493 |
return 0; |
| 494 |
} |
| 495 |
|
| 496 |
static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp) |
| 497 |
{
|
| 498 |
const char *p; |
| 499 |
int v;
|
| 500 |
|
| 501 |
p = *pp; |
| 502 |
skip_spaces(&p); |
| 503 |
v = strtol(p, (char **)&p, 10); |
| 504 |
if (*p == '-') { |
| 505 |
p++; |
| 506 |
*min_ptr = v; |
| 507 |
v = strtol(p, (char **)&p, 10); |
| 508 |
*max_ptr = v; |
| 509 |
} else {
|
| 510 |
*min_ptr = v; |
| 511 |
*max_ptr = v; |
| 512 |
} |
| 513 |
*pp = p; |
| 514 |
} |
| 515 |
|
| 516 |
/* XXX: only one transport specification is parsed */
|
| 517 |
static void rtsp_parse_transport(RTSPHeader *reply, const char *p) |
| 518 |
{
|
| 519 |
char transport_protocol[16]; |
| 520 |
char profile[16]; |
| 521 |
char lower_transport[16]; |
| 522 |
char parameter[16]; |
| 523 |
RTSPTransportField *th; |
| 524 |
char buf[256]; |
| 525 |
|
| 526 |
reply->nb_transports = 0;
|
| 527 |
|
| 528 |
for(;;) {
|
| 529 |
skip_spaces(&p); |
| 530 |
if (*p == '\0') |
| 531 |
break;
|
| 532 |
|
| 533 |
th = &reply->transports[reply->nb_transports]; |
| 534 |
|
| 535 |
get_word_sep(transport_protocol, sizeof(transport_protocol),
|
| 536 |
"/", &p);
|
| 537 |
if (*p == '/') |
| 538 |
p++; |
| 539 |
get_word_sep(profile, sizeof(profile), "/;,", &p); |
| 540 |
lower_transport[0] = '\0'; |
| 541 |
if (*p == '/') { |
| 542 |
p++; |
| 543 |
get_word_sep(lower_transport, sizeof(lower_transport),
|
| 544 |
";,", &p);
|
| 545 |
} |
| 546 |
if (!strcasecmp(lower_transport, "TCP")) |
| 547 |
th->protocol = RTSP_PROTOCOL_RTP_TCP; |
| 548 |
else
|
| 549 |
th->protocol = RTSP_PROTOCOL_RTP_UDP; |
| 550 |
|
| 551 |
if (*p == ';') |
| 552 |
p++; |
| 553 |
/* get each parameter */
|
| 554 |
while (*p != '\0' && *p != ',') { |
| 555 |
get_word_sep(parameter, sizeof(parameter), "=;,", &p); |
| 556 |
if (!strcmp(parameter, "port")) { |
| 557 |
if (*p == '=') { |
| 558 |
p++; |
| 559 |
rtsp_parse_range(&th->port_min, &th->port_max, &p); |
| 560 |
} |
| 561 |
} else if (!strcmp(parameter, "client_port")) { |
| 562 |
if (*p == '=') { |
| 563 |
p++; |
| 564 |
rtsp_parse_range(&th->client_port_min, |
| 565 |
&th->client_port_max, &p); |
| 566 |
} |
| 567 |
} else if (!strcmp(parameter, "server_port")) { |
| 568 |
if (*p == '=') { |
| 569 |
p++; |
| 570 |
rtsp_parse_range(&th->server_port_min, |
| 571 |
&th->server_port_max, &p); |
| 572 |
} |
| 573 |
} else if (!strcmp(parameter, "interleaved")) { |
| 574 |
if (*p == '=') { |
| 575 |
p++; |
| 576 |
rtsp_parse_range(&th->interleaved_min, |
| 577 |
&th->interleaved_max, &p); |
| 578 |
} |
| 579 |
} else if (!strcmp(parameter, "multicast")) { |
| 580 |
if (th->protocol == RTSP_PROTOCOL_RTP_UDP)
|
| 581 |
th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST; |
| 582 |
} else if (!strcmp(parameter, "ttl")) { |
| 583 |
if (*p == '=') { |
| 584 |
p++; |
| 585 |
th->ttl = strtol(p, (char **)&p, 10); |
| 586 |
} |
| 587 |
} else if (!strcmp(parameter, "destination")) { |
| 588 |
struct in_addr ipaddr;
|
| 589 |
|
| 590 |
if (*p == '=') { |
| 591 |
p++; |
| 592 |
get_word_sep(buf, sizeof(buf), ";,", &p); |
| 593 |
if (inet_aton(buf, &ipaddr))
|
| 594 |
th->destination = ntohl(ipaddr.s_addr); |
| 595 |
} |
| 596 |
} |
| 597 |
while (*p != ';' && *p != '\0' && *p != ',') |
| 598 |
p++; |
| 599 |
if (*p == ';') |
| 600 |
p++; |
| 601 |
} |
| 602 |
if (*p == ',') |
| 603 |
p++; |
| 604 |
|
| 605 |
reply->nb_transports++; |
| 606 |
} |
| 607 |
} |
| 608 |
|
| 609 |
static void rtsp_parse_range_npt(RTSPHeader *reply, const char *p) |
| 610 |
{
|
| 611 |
char buf[256]; |
| 612 |
|
| 613 |
skip_spaces(&p); |
| 614 |
if (!stristart(p, "npt=", &p)) |
| 615 |
return;
|
| 616 |
|
| 617 |
reply->range_start = AV_NOPTS_VALUE; |
| 618 |
reply->range_end = AV_NOPTS_VALUE; |
| 619 |
|
| 620 |
get_word_sep(buf, sizeof(buf), "-", &p); |
| 621 |
reply->range_start = parse_date(buf, 1);
|
| 622 |
if (*p == '-') { |
| 623 |
p++; |
| 624 |
get_word_sep(buf, sizeof(buf), "-", &p); |
| 625 |
reply->range_end = parse_date(buf, 1);
|
| 626 |
} |
| 627 |
} |
| 628 |
|
| 629 |
void rtsp_parse_line(RTSPHeader *reply, const char *buf) |
| 630 |
{
|
| 631 |
const char *p; |
| 632 |
|
| 633 |
/* NOTE: we do case independent match for broken servers */
|
| 634 |
p = buf; |
| 635 |
if (stristart(p, "Session:", &p)) { |
| 636 |
get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p); |
| 637 |
} else if (stristart(p, "Content-Length:", &p)) { |
| 638 |
reply->content_length = strtol(p, NULL, 10); |
| 639 |
} else if (stristart(p, "Transport:", &p)) { |
| 640 |
rtsp_parse_transport(reply, p); |
| 641 |
} else if (stristart(p, "CSeq:", &p)) { |
| 642 |
reply->seq = strtol(p, NULL, 10); |
| 643 |
} else if (stristart(p, "Range:", &p)) { |
| 644 |
rtsp_parse_range_npt(reply, p); |
| 645 |
} |
| 646 |
} |
| 647 |
|
| 648 |
static int url_readbuf(URLContext *h, unsigned char *buf, int size) |
| 649 |
{
|
| 650 |
int ret, len;
|
| 651 |
|
| 652 |
len = 0;
|
| 653 |
while (len < size) {
|
| 654 |
ret = url_read(h, buf+len, size-len); |
| 655 |
if (ret < 1) |
| 656 |
return ret;
|
| 657 |
len += ret; |
| 658 |
} |
| 659 |
return len;
|
| 660 |
} |
| 661 |
|
| 662 |
/* skip a RTP/TCP interleaved packet */
|
| 663 |
static void rtsp_skip_packet(AVFormatContext *s) |
| 664 |
{
|
| 665 |
RTSPState *rt = s->priv_data; |
| 666 |
int ret, len, len1;
|
| 667 |
uint8_t buf[1024];
|
| 668 |
|
| 669 |
ret = url_readbuf(rt->rtsp_hd, buf, 3);
|
| 670 |
if (ret != 3) |
| 671 |
return;
|
| 672 |
len = (buf[1] << 8) | buf[2]; |
| 673 |
#ifdef DEBUG
|
| 674 |
printf("skipping RTP packet len=%d\n", len);
|
| 675 |
#endif
|
| 676 |
/* skip payload */
|
| 677 |
while (len > 0) { |
| 678 |
len1 = len; |
| 679 |
if (len1 > sizeof(buf)) |
| 680 |
len1 = sizeof(buf);
|
| 681 |
ret = url_readbuf(rt->rtsp_hd, buf, len1); |
| 682 |
if (ret != len1)
|
| 683 |
return;
|
| 684 |
len -= len1; |
| 685 |
} |
| 686 |
} |
| 687 |
|
| 688 |
static void rtsp_send_cmd(AVFormatContext *s, |
| 689 |
const char *cmd, RTSPHeader *reply, |
| 690 |
unsigned char **content_ptr) |
| 691 |
{
|
| 692 |
RTSPState *rt = s->priv_data; |
| 693 |
char buf[4096], buf1[1024], *q; |
| 694 |
unsigned char ch; |
| 695 |
const char *p; |
| 696 |
int content_length, line_count;
|
| 697 |
unsigned char *content = NULL; |
| 698 |
|
| 699 |
memset(reply, 0, sizeof(RTSPHeader)); |
| 700 |
|
| 701 |
rt->seq++; |
| 702 |
pstrcpy(buf, sizeof(buf), cmd);
|
| 703 |
snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq); |
| 704 |
pstrcat(buf, sizeof(buf), buf1);
|
| 705 |
if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) { |
| 706 |
snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id); |
| 707 |
pstrcat(buf, sizeof(buf), buf1);
|
| 708 |
} |
| 709 |
pstrcat(buf, sizeof(buf), "\r\n"); |
| 710 |
#ifdef DEBUG
|
| 711 |
printf("Sending:\n%s--\n", buf);
|
| 712 |
#endif
|
| 713 |
url_write(rt->rtsp_hd, buf, strlen(buf)); |
| 714 |
|
| 715 |
/* parse reply (XXX: use buffers) */
|
| 716 |
line_count = 0;
|
| 717 |
rt->last_reply[0] = '\0'; |
| 718 |
for(;;) {
|
| 719 |
q = buf; |
| 720 |
for(;;) {
|
| 721 |
if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1) |
| 722 |
break;
|
| 723 |
if (ch == '\n') |
| 724 |
break;
|
| 725 |
if (ch == '$') { |
| 726 |
/* XXX: only parse it if first char on line ? */
|
| 727 |
rtsp_skip_packet(s); |
| 728 |
} else if (ch != '\r') { |
| 729 |
if ((q - buf) < sizeof(buf) - 1) |
| 730 |
*q++ = ch; |
| 731 |
} |
| 732 |
} |
| 733 |
*q = '\0';
|
| 734 |
#ifdef DEBUG
|
| 735 |
printf("line='%s'\n", buf);
|
| 736 |
#endif
|
| 737 |
/* test if last line */
|
| 738 |
if (buf[0] == '\0') |
| 739 |
break;
|
| 740 |
p = buf; |
| 741 |
if (line_count == 0) { |
| 742 |
/* get reply code */
|
| 743 |
get_word(buf1, sizeof(buf1), &p);
|
| 744 |
get_word(buf1, sizeof(buf1), &p);
|
| 745 |
reply->status_code = atoi(buf1); |
| 746 |
} else {
|
| 747 |
rtsp_parse_line(reply, p); |
| 748 |
pstrcat(rt->last_reply, sizeof(rt->last_reply), p);
|
| 749 |
pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n"); |
| 750 |
} |
| 751 |
line_count++; |
| 752 |
} |
| 753 |
|
| 754 |
if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0') |
| 755 |
pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id);
|
| 756 |
|
| 757 |
content_length = reply->content_length; |
| 758 |
if (content_length > 0) { |
| 759 |
/* leave some room for a trailing '\0' (useful for simple parsing) */
|
| 760 |
content = av_malloc(content_length + 1);
|
| 761 |
(void)url_readbuf(rt->rtsp_hd, content, content_length);
|
| 762 |
content[content_length] = '\0';
|
| 763 |
} |
| 764 |
if (content_ptr)
|
| 765 |
*content_ptr = content; |
| 766 |
} |
| 767 |
|
| 768 |
/* useful for modules: set RTSP callback function */
|
| 769 |
|
| 770 |
void rtsp_set_callback(FFRTSPCallback *rtsp_cb)
|
| 771 |
{
|
| 772 |
ff_rtsp_callback = rtsp_cb; |
| 773 |
} |
| 774 |
|
| 775 |
|
| 776 |
/* close and free RTSP streams */
|
| 777 |
static void rtsp_close_streams(RTSPState *rt) |
| 778 |
{
|
| 779 |
int i;
|
| 780 |
RTSPStream *rtsp_st; |
| 781 |
|
| 782 |
for(i=0;i<rt->nb_rtsp_streams;i++) { |
| 783 |
rtsp_st = rt->rtsp_streams[i]; |
| 784 |
if (rtsp_st) {
|
| 785 |
if (rtsp_st->rtp_ctx)
|
| 786 |
rtp_parse_close(rtsp_st->rtp_ctx); |
| 787 |
if (rtsp_st->rtp_handle)
|
| 788 |
url_close(rtsp_st->rtp_handle); |
| 789 |
} |
| 790 |
av_free(rtsp_st); |
| 791 |
} |
| 792 |
av_free(rt->rtsp_streams); |
| 793 |
} |
| 794 |
|
| 795 |
static int rtsp_read_header(AVFormatContext *s, |
| 796 |
AVFormatParameters *ap) |
| 797 |
{
|
| 798 |
RTSPState *rt = s->priv_data; |
| 799 |
char host[1024], path[1024], tcpname[1024], cmd[2048]; |
| 800 |
URLContext *rtsp_hd; |
| 801 |
int port, i, j, ret, err;
|
| 802 |
RTSPHeader reply1, *reply = &reply1; |
| 803 |
unsigned char *content = NULL; |
| 804 |
RTSPStream *rtsp_st; |
| 805 |
int protocol_mask;
|
| 806 |
AVStream *st; |
| 807 |
|
| 808 |
/* extract hostname and port */
|
| 809 |
url_split(NULL, 0, NULL, 0, |
| 810 |
host, sizeof(host), &port, path, sizeof(path), s->filename); |
| 811 |
if (port < 0) |
| 812 |
port = RTSP_DEFAULT_PORT; |
| 813 |
|
| 814 |
/* open the tcp connexion */
|
| 815 |
snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port); |
| 816 |
if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) |
| 817 |
return AVERROR_IO;
|
| 818 |
rt->rtsp_hd = rtsp_hd; |
| 819 |
rt->seq = 0;
|
| 820 |
|
| 821 |
/* describe the stream */
|
| 822 |
snprintf(cmd, sizeof(cmd),
|
| 823 |
"DESCRIBE %s RTSP/1.0\r\n"
|
| 824 |
"Accept: application/sdp\r\n",
|
| 825 |
s->filename); |
| 826 |
rtsp_send_cmd(s, cmd, reply, &content); |
| 827 |
if (!content) {
|
| 828 |
err = AVERROR_INVALIDDATA; |
| 829 |
goto fail;
|
| 830 |
} |
| 831 |
if (reply->status_code != RTSP_STATUS_OK) {
|
| 832 |
err = AVERROR_INVALIDDATA; |
| 833 |
goto fail;
|
| 834 |
} |
| 835 |
|
| 836 |
/* now we got the SDP description, we parse it */
|
| 837 |
ret = sdp_parse(s, (const char *)content); |
| 838 |
av_freep(&content); |
| 839 |
if (ret < 0) { |
| 840 |
err = AVERROR_INVALIDDATA; |
| 841 |
goto fail;
|
| 842 |
} |
| 843 |
|
| 844 |
protocol_mask = rtsp_default_protocols; |
| 845 |
|
| 846 |
/* for each stream, make the setup request */
|
| 847 |
/* XXX: we assume the same server is used for the control of each
|
| 848 |
RTSP stream */
|
| 849 |
|
| 850 |
for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) { |
| 851 |
char transport[2048]; |
| 852 |
|
| 853 |
rtsp_st = rt->rtsp_streams[i]; |
| 854 |
|
| 855 |
/* compute available transports */
|
| 856 |
transport[0] = '\0'; |
| 857 |
|
| 858 |
/* RTP/UDP */
|
| 859 |
if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) { |
| 860 |
char buf[256]; |
| 861 |
|
| 862 |
/* first try in specified port range */
|
| 863 |
if (RTSP_RTP_PORT_MIN != 0) { |
| 864 |
while(j <= RTSP_RTP_PORT_MAX) {
|
| 865 |
snprintf(buf, sizeof(buf), "rtp://?localport=%d", j); |
| 866 |
if (url_open(&rtsp_st->rtp_handle, buf, URL_RDONLY) == 0) { |
| 867 |
j += 2; /* we will use two port by rtp stream (rtp and rtcp) */ |
| 868 |
goto rtp_opened;
|
| 869 |
} |
| 870 |
} |
| 871 |
} |
| 872 |
|
| 873 |
/* then try on any port
|
| 874 |
** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) {
|
| 875 |
** err = AVERROR_INVALIDDATA;
|
| 876 |
** goto fail;
|
| 877 |
** }
|
| 878 |
*/
|
| 879 |
|
| 880 |
rtp_opened:
|
| 881 |
port = rtp_get_local_port(rtsp_st->rtp_handle); |
| 882 |
if (transport[0] != '\0') |
| 883 |
pstrcat(transport, sizeof(transport), ","); |
| 884 |
snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, |
| 885 |
"RTP/AVP/UDP;unicast;client_port=%d-%d",
|
| 886 |
port, port + 1);
|
| 887 |
} |
| 888 |
|
| 889 |
/* RTP/TCP */
|
| 890 |
else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) { |
| 891 |
if (transport[0] != '\0') |
| 892 |
pstrcat(transport, sizeof(transport), ","); |
| 893 |
snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, |
| 894 |
"RTP/AVP/TCP");
|
| 895 |
} |
| 896 |
|
| 897 |
else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) { |
| 898 |
if (transport[0] != '\0') |
| 899 |
pstrcat(transport, sizeof(transport), ","); |
| 900 |
snprintf(transport + strlen(transport), |
| 901 |
sizeof(transport) - strlen(transport) - 1, |
| 902 |
"RTP/AVP/UDP;multicast");
|
| 903 |
} |
| 904 |
snprintf(cmd, sizeof(cmd),
|
| 905 |
"SETUP %s RTSP/1.0\r\n"
|
| 906 |
"Transport: %s\r\n",
|
| 907 |
rtsp_st->control_url, transport); |
| 908 |
rtsp_send_cmd(s, cmd, reply, NULL);
|
| 909 |
if (reply->status_code != RTSP_STATUS_OK ||
|
| 910 |
reply->nb_transports != 1) {
|
| 911 |
err = AVERROR_INVALIDDATA; |
| 912 |
goto fail;
|
| 913 |
} |
| 914 |
|
| 915 |
/* XXX: same protocol for all streams is required */
|
| 916 |
if (i > 0) { |
| 917 |
if (reply->transports[0].protocol != rt->protocol) { |
| 918 |
err = AVERROR_INVALIDDATA; |
| 919 |
goto fail;
|
| 920 |
} |
| 921 |
} else {
|
| 922 |
rt->protocol = reply->transports[0].protocol;
|
| 923 |
} |
| 924 |
|
| 925 |
/* close RTP connection if not choosen */
|
| 926 |
if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP && |
| 927 |
(protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) {
|
| 928 |
url_close(rtsp_st->rtp_handle); |
| 929 |
rtsp_st->rtp_handle = NULL;
|
| 930 |
} |
| 931 |
|
| 932 |
switch(reply->transports[0].protocol) { |
| 933 |
case RTSP_PROTOCOL_RTP_TCP:
|
| 934 |
rtsp_st->interleaved_min = reply->transports[0].interleaved_min;
|
| 935 |
rtsp_st->interleaved_max = reply->transports[0].interleaved_max;
|
| 936 |
break;
|
| 937 |
|
| 938 |
case RTSP_PROTOCOL_RTP_UDP:
|
| 939 |
{
|
| 940 |
char url[1024]; |
| 941 |
|
| 942 |
/* XXX: also use address if specified */
|
| 943 |
snprintf(url, sizeof(url), "rtp://%s:%d", |
| 944 |
host, reply->transports[0].server_port_min);
|
| 945 |
if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) { |
| 946 |
err = AVERROR_INVALIDDATA; |
| 947 |
goto fail;
|
| 948 |
} |
| 949 |
} |
| 950 |
break;
|
| 951 |
case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
|
| 952 |
{
|
| 953 |
char url[1024]; |
| 954 |
int ttl;
|
| 955 |
|
| 956 |
ttl = reply->transports[0].ttl;
|
| 957 |
if (!ttl)
|
| 958 |
ttl = 16;
|
| 959 |
snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d", |
| 960 |
host, |
| 961 |
reply->transports[0].server_port_min,
|
| 962 |
ttl); |
| 963 |
if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) { |
| 964 |
err = AVERROR_INVALIDDATA; |
| 965 |
goto fail;
|
| 966 |
} |
| 967 |
} |
| 968 |
break;
|
| 969 |
} |
| 970 |
/* open the RTP context */
|
| 971 |
st = NULL;
|
| 972 |
if (rtsp_st->stream_index >= 0) |
| 973 |
st = s->streams[rtsp_st->stream_index]; |
| 974 |
if (!st)
|
| 975 |
s->ctx_flags |= AVFMTCTX_NOHEADER; |
| 976 |
rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data); |
| 977 |
|
| 978 |
if (!rtsp_st->rtp_ctx) {
|
| 979 |
err = AVERROR_NOMEM; |
| 980 |
goto fail;
|
| 981 |
} |
| 982 |
} |
| 983 |
|
| 984 |
/* use callback if available to extend setup */
|
| 985 |
if (ff_rtsp_callback) {
|
| 986 |
if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id,
|
| 987 |
NULL, 0, rt->last_reply) < 0) { |
| 988 |
err = AVERROR_INVALIDDATA; |
| 989 |
goto fail;
|
| 990 |
} |
| 991 |
} |
| 992 |
|
| 993 |
|
| 994 |
rt->state = RTSP_STATE_IDLE; |
| 995 |
rt->seek_timestamp = 0; /* default is to start stream at position |
| 996 |
zero */
|
| 997 |
if (ap && ap->initial_pause) {
|
| 998 |
/* do not start immediately */
|
| 999 |
} else {
|
| 1000 |
if (rtsp_read_play(s) < 0) { |
| 1001 |
err = AVERROR_INVALIDDATA; |
| 1002 |
goto fail;
|
| 1003 |
} |
| 1004 |
} |
| 1005 |
return 0; |
| 1006 |
fail:
|
| 1007 |
rtsp_close_streams(rt); |
| 1008 |
av_freep(&content); |
| 1009 |
url_close(rt->rtsp_hd); |
| 1010 |
return err;
|
| 1011 |
} |
| 1012 |
|
| 1013 |
static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, |
| 1014 |
uint8_t *buf, int buf_size)
|
| 1015 |
{
|
| 1016 |
RTSPState *rt = s->priv_data; |
| 1017 |
int id, len, i, ret;
|
| 1018 |
RTSPStream *rtsp_st; |
| 1019 |
|
| 1020 |
#ifdef DEBUG_RTP_TCP
|
| 1021 |
printf("tcp_read_packet:\n");
|
| 1022 |
#endif
|
| 1023 |
redo:
|
| 1024 |
for(;;) {
|
| 1025 |
ret = url_readbuf(rt->rtsp_hd, buf, 1);
|
| 1026 |
#ifdef DEBUG_RTP_TCP
|
| 1027 |
printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]); |
| 1028 |
#endif
|
| 1029 |
if (ret != 1) |
| 1030 |
return -1; |
| 1031 |
if (buf[0] == '$') |
| 1032 |
break;
|
| 1033 |
} |
| 1034 |
ret = url_readbuf(rt->rtsp_hd, buf, 3);
|
| 1035 |
if (ret != 3) |
| 1036 |
return -1; |
| 1037 |
id = buf[0];
|
| 1038 |
len = (buf[1] << 8) | buf[2]; |
| 1039 |
#ifdef DEBUG_RTP_TCP
|
| 1040 |
printf("id=%d len=%d\n", id, len);
|
| 1041 |
#endif
|
| 1042 |
if (len > buf_size || len < 12) |
| 1043 |
goto redo;
|
| 1044 |
/* get the data */
|
| 1045 |
ret = url_readbuf(rt->rtsp_hd, buf, len); |
| 1046 |
if (ret != len)
|
| 1047 |
return -1; |
| 1048 |
|
| 1049 |
/* find the matching stream */
|
| 1050 |
for(i = 0; i < rt->nb_rtsp_streams; i++) { |
| 1051 |
rtsp_st = rt->rtsp_streams[i]; |
| 1052 |
if (id >= rtsp_st->interleaved_min &&
|
| 1053 |
id <= rtsp_st->interleaved_max) |
| 1054 |
goto found;
|
| 1055 |
} |
| 1056 |
goto redo;
|
| 1057 |
found:
|
| 1058 |
*prtsp_st = rtsp_st; |
| 1059 |
return len;
|
| 1060 |
} |
| 1061 |
|
| 1062 |
static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, |
| 1063 |
uint8_t *buf, int buf_size)
|
| 1064 |
{
|
| 1065 |
RTSPState *rt = s->priv_data; |
| 1066 |
RTSPStream *rtsp_st; |
| 1067 |
fd_set rfds; |
| 1068 |
int fd1, fd2, fd_max, n, i, ret;
|
| 1069 |
struct timeval tv;
|
| 1070 |
|
| 1071 |
for(;;) {
|
| 1072 |
if (url_interrupt_cb())
|
| 1073 |
return -1; |
| 1074 |
FD_ZERO(&rfds); |
| 1075 |
fd_max = -1;
|
| 1076 |
for(i = 0; i < rt->nb_rtsp_streams; i++) { |
| 1077 |
rtsp_st = rt->rtsp_streams[i]; |
| 1078 |
/* currently, we cannot probe RTCP handle because of blocking restrictions */
|
| 1079 |
rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2); |
| 1080 |
if (fd1 > fd_max)
|
| 1081 |
fd_max = fd1; |
| 1082 |
FD_SET(fd1, &rfds); |
| 1083 |
} |
| 1084 |
tv.tv_sec = 0;
|
| 1085 |
tv.tv_usec = 100 * 1000; |
| 1086 |
n = select(fd_max + 1, &rfds, NULL, NULL, &tv); |
| 1087 |
if (n > 0) { |
| 1088 |
for(i = 0; i < rt->nb_rtsp_streams; i++) { |
| 1089 |
rtsp_st = rt->rtsp_streams[i]; |
| 1090 |
rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2); |
| 1091 |
if (FD_ISSET(fd1, &rfds)) {
|
| 1092 |
ret = url_read(rtsp_st->rtp_handle, buf, buf_size); |
| 1093 |
if (ret > 0) { |
| 1094 |
*prtsp_st = rtsp_st; |
| 1095 |
return ret;
|
| 1096 |
} |
| 1097 |
} |
| 1098 |
} |
| 1099 |
} |
| 1100 |
} |
| 1101 |
} |
| 1102 |
|
| 1103 |
static int rtsp_read_packet(AVFormatContext *s, |
| 1104 |
AVPacket *pkt) |
| 1105 |
{
|
| 1106 |
RTSPState *rt = s->priv_data; |
| 1107 |
RTSPStream *rtsp_st; |
| 1108 |
int ret, len;
|
| 1109 |
uint8_t buf[RTP_MAX_PACKET_LENGTH]; |
| 1110 |
|
| 1111 |
/* get next frames from the same RTP packet */
|
| 1112 |
if (rt->cur_rtp) {
|
| 1113 |
ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0); |
| 1114 |
if (ret == 0) { |
| 1115 |
rt->cur_rtp = NULL;
|
| 1116 |
return 0; |
| 1117 |
} else if (ret == 1) { |
| 1118 |
return 0; |
| 1119 |
} else {
|
| 1120 |
rt->cur_rtp = NULL;
|
| 1121 |
} |
| 1122 |
} |
| 1123 |
|
| 1124 |
/* read next RTP packet */
|
| 1125 |
redo:
|
| 1126 |
switch(rt->protocol) {
|
| 1127 |
default:
|
| 1128 |
case RTSP_PROTOCOL_RTP_TCP:
|
| 1129 |
len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf));
|
| 1130 |
break;
|
| 1131 |
case RTSP_PROTOCOL_RTP_UDP:
|
| 1132 |
case RTSP_PROTOCOL_RTP_UDP_MULTICAST:
|
| 1133 |
len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf));
|
| 1134 |
break;
|
| 1135 |
} |
| 1136 |
if (len < 0) |
| 1137 |
return AVERROR_IO;
|
| 1138 |
ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len); |
| 1139 |
if (ret < 0) |
| 1140 |
goto redo;
|
| 1141 |
if (ret == 1) { |
| 1142 |
/* more packets may follow, so we save the RTP context */
|
| 1143 |
rt->cur_rtp = rtsp_st->rtp_ctx; |
| 1144 |
} |
| 1145 |
return 0; |
| 1146 |
} |
| 1147 |
|
| 1148 |
static int rtsp_read_play(AVFormatContext *s) |
| 1149 |
{
|
| 1150 |
RTSPState *rt = s->priv_data; |
| 1151 |
RTSPHeader reply1, *reply = &reply1; |
| 1152 |
char cmd[1024]; |
| 1153 |
|
| 1154 |
av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state);
|
| 1155 |
|
| 1156 |
if (rt->state == RTSP_STATE_PAUSED) {
|
| 1157 |
snprintf(cmd, sizeof(cmd),
|
| 1158 |
"PLAY %s RTSP/1.0\r\n",
|
| 1159 |
s->filename); |
| 1160 |
} else {
|
| 1161 |
snprintf(cmd, sizeof(cmd),
|
| 1162 |
"PLAY %s RTSP/1.0\r\n"
|
| 1163 |
"Range: npt=%0.3f-\r\n",
|
| 1164 |
s->filename, |
| 1165 |
(double)rt->seek_timestamp / AV_TIME_BASE);
|
| 1166 |
} |
| 1167 |
rtsp_send_cmd(s, cmd, reply, NULL);
|
| 1168 |
if (reply->status_code != RTSP_STATUS_OK) {
|
| 1169 |
return -1; |
| 1170 |
} else {
|
| 1171 |
rt->state = RTSP_STATE_PLAYING; |
| 1172 |
return 0; |
| 1173 |
} |
| 1174 |
} |
| 1175 |
|
| 1176 |
/* pause the stream */
|
| 1177 |
static int rtsp_read_pause(AVFormatContext *s) |
| 1178 |
{
|
| 1179 |
RTSPState *rt = s->priv_data; |
| 1180 |
RTSPHeader reply1, *reply = &reply1; |
| 1181 |
char cmd[1024]; |
| 1182 |
|
| 1183 |
rt = s->priv_data; |
| 1184 |
|
| 1185 |
if (rt->state != RTSP_STATE_PLAYING)
|
| 1186 |
return 0; |
| 1187 |
|
| 1188 |
snprintf(cmd, sizeof(cmd),
|
| 1189 |
"PAUSE %s RTSP/1.0\r\n",
|
| 1190 |
s->filename); |
| 1191 |
rtsp_send_cmd(s, cmd, reply, NULL);
|
| 1192 |
if (reply->status_code != RTSP_STATUS_OK) {
|
| 1193 |
return -1; |
| 1194 |
} else {
|
| 1195 |
rt->state = RTSP_STATE_PAUSED; |
| 1196 |
return 0; |
| 1197 |
} |
| 1198 |
} |
| 1199 |
|
| 1200 |
static int rtsp_read_seek(AVFormatContext *s, int stream_index, |
| 1201 |
int64_t timestamp, int flags)
|
| 1202 |
{
|
| 1203 |
RTSPState *rt = s->priv_data; |
| 1204 |
|
| 1205 |
rt->seek_timestamp = timestamp; |
| 1206 |
switch(rt->state) {
|
| 1207 |
default:
|
| 1208 |
case RTSP_STATE_IDLE:
|
| 1209 |
break;
|
| 1210 |
case RTSP_STATE_PLAYING:
|
| 1211 |
if (rtsp_read_play(s) != 0) |
| 1212 |
return -1; |
| 1213 |
break;
|
| 1214 |
case RTSP_STATE_PAUSED:
|
| 1215 |
rt->state = RTSP_STATE_IDLE; |
| 1216 |
break;
|
| 1217 |
} |
| 1218 |
return 0; |
| 1219 |
} |
| 1220 |
|
| 1221 |
static int rtsp_read_close(AVFormatContext *s) |
| 1222 |
{
|
| 1223 |
RTSPState *rt = s->priv_data; |
| 1224 |
RTSPHeader reply1, *reply = &reply1; |
| 1225 |
char cmd[1024]; |
| 1226 |
|
| 1227 |
#if 0
|
| 1228 |
/* NOTE: it is valid to flush the buffer here */
|
| 1229 |
if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) {
|
| 1230 |
url_fclose(&rt->rtsp_gb);
|
| 1231 |
}
|
| 1232 |
#endif
|
| 1233 |
snprintf(cmd, sizeof(cmd),
|
| 1234 |
"TEARDOWN %s RTSP/1.0\r\n",
|
| 1235 |
s->filename); |
| 1236 |
rtsp_send_cmd(s, cmd, reply, NULL);
|
| 1237 |
|
| 1238 |
if (ff_rtsp_callback) {
|
| 1239 |
ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id, |
| 1240 |
NULL, 0, NULL); |
| 1241 |
} |
| 1242 |
|
| 1243 |
rtsp_close_streams(rt); |
| 1244 |
url_close(rt->rtsp_hd); |
| 1245 |
return 0; |
| 1246 |
} |
| 1247 |
|
| 1248 |
AVInputFormat rtsp_demux = {
|
| 1249 |
"rtsp",
|
| 1250 |
"RTSP input format",
|
| 1251 |
sizeof(RTSPState),
|
| 1252 |
rtsp_probe, |
| 1253 |
rtsp_read_header, |
| 1254 |
rtsp_read_packet, |
| 1255 |
rtsp_read_close, |
| 1256 |
rtsp_read_seek, |
| 1257 |
.flags = AVFMT_NOFILE, |
| 1258 |
.read_play = rtsp_read_play, |
| 1259 |
.read_pause = rtsp_read_pause, |
| 1260 |
}; |
| 1261 |
|
| 1262 |
static int sdp_probe(AVProbeData *p1) |
| 1263 |
{
|
| 1264 |
const char *p = p1->buf, *p_end = p1->buf + p1->buf_size; |
| 1265 |
|
| 1266 |
/* we look for a line beginning "c=IN IP4" */
|
| 1267 |
while (p < p_end && *p != '\0') { |
| 1268 |
if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL)) |
| 1269 |
return AVPROBE_SCORE_MAX / 2; |
| 1270 |
|
| 1271 |
while(p < p_end - 1 && *p != '\n') p++; |
| 1272 |
if (++p >= p_end)
|
| 1273 |
break;
|
| 1274 |
if (*p == '\r') |
| 1275 |
p++; |
| 1276 |
} |
| 1277 |
return 0; |
| 1278 |
} |
| 1279 |
|
| 1280 |
#define SDP_MAX_SIZE 8192 |
| 1281 |
|
| 1282 |
static int sdp_read_header(AVFormatContext *s, |
| 1283 |
AVFormatParameters *ap) |
| 1284 |
{
|
| 1285 |
RTSPState *rt = s->priv_data; |
| 1286 |
RTSPStream *rtsp_st; |
| 1287 |
int size, i, err;
|
| 1288 |
char *content;
|
| 1289 |
char url[1024]; |
| 1290 |
AVStream *st; |
| 1291 |
|
| 1292 |
/* read the whole sdp file */
|
| 1293 |
/* XXX: better loading */
|
| 1294 |
content = av_malloc(SDP_MAX_SIZE); |
| 1295 |
size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1);
|
| 1296 |
if (size <= 0) { |
| 1297 |
av_free(content); |
| 1298 |
return AVERROR_INVALIDDATA;
|
| 1299 |
} |
| 1300 |
content[size] ='\0';
|
| 1301 |
|
| 1302 |
sdp_parse(s, content); |
| 1303 |
av_free(content); |
| 1304 |
|
| 1305 |
/* open each RTP stream */
|
| 1306 |
for(i=0;i<rt->nb_rtsp_streams;i++) { |
| 1307 |
rtsp_st = rt->rtsp_streams[i]; |
| 1308 |
|
| 1309 |
snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d", |
| 1310 |
inet_ntoa(rtsp_st->sdp_ip), |
| 1311 |
rtsp_st->sdp_port, |
| 1312 |
rtsp_st->sdp_ttl); |
| 1313 |
if (url_open(&rtsp_st->rtp_handle, url, URL_RDONLY) < 0) { |
| 1314 |
err = AVERROR_INVALIDDATA; |
| 1315 |
goto fail;
|
| 1316 |
} |
| 1317 |
/* open the RTP context */
|
| 1318 |
st = NULL;
|
| 1319 |
if (rtsp_st->stream_index >= 0) |
| 1320 |
st = s->streams[rtsp_st->stream_index]; |
| 1321 |
if (!st)
|
| 1322 |
s->ctx_flags |= AVFMTCTX_NOHEADER; |
| 1323 |
rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data); |
| 1324 |
if (!rtsp_st->rtp_ctx) {
|
| 1325 |
err = AVERROR_NOMEM; |
| 1326 |
goto fail;
|
| 1327 |
} |
| 1328 |
} |
| 1329 |
return 0; |
| 1330 |
fail:
|
| 1331 |
rtsp_close_streams(rt); |
| 1332 |
return err;
|
| 1333 |
} |
| 1334 |
|
| 1335 |
static int sdp_read_packet(AVFormatContext *s, |
| 1336 |
AVPacket *pkt) |
| 1337 |
{
|
| 1338 |
return rtsp_read_packet(s, pkt);
|
| 1339 |
} |
| 1340 |
|
| 1341 |
static int sdp_read_close(AVFormatContext *s) |
| 1342 |
{
|
| 1343 |
RTSPState *rt = s->priv_data; |
| 1344 |
rtsp_close_streams(rt); |
| 1345 |
return 0; |
| 1346 |
} |
| 1347 |
|
| 1348 |
|
| 1349 |
static AVInputFormat sdp_demux = {
|
| 1350 |
"sdp",
|
| 1351 |
"SDP",
|
| 1352 |
sizeof(RTSPState),
|
| 1353 |
sdp_probe, |
| 1354 |
sdp_read_header, |
| 1355 |
sdp_read_packet, |
| 1356 |
sdp_read_close, |
| 1357 |
}; |
| 1358 |
|
| 1359 |
|
| 1360 |
/* dummy redirector format (used directly in av_open_input_file now) */
|
| 1361 |
static int redir_probe(AVProbeData *pd) |
| 1362 |
{
|
| 1363 |
const char *p; |
| 1364 |
p = pd->buf; |
| 1365 |
while (redir_isspace(*p))
|
| 1366 |
p++; |
| 1367 |
if (strstart(p, "http://", NULL) || |
| 1368 |
strstart(p, "rtsp://", NULL)) |
| 1369 |
return AVPROBE_SCORE_MAX;
|
| 1370 |
return 0; |
| 1371 |
} |
| 1372 |
|
| 1373 |
/* called from utils.c */
|
| 1374 |
int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f)
|
| 1375 |
{
|
| 1376 |
char buf[4096], *q; |
| 1377 |
int c;
|
| 1378 |
AVFormatContext *ic = NULL;
|
| 1379 |
|
| 1380 |
/* parse each URL and try to open it */
|
| 1381 |
c = url_fgetc(f); |
| 1382 |
while (c != URL_EOF) {
|
| 1383 |
/* skip spaces */
|
| 1384 |
for(;;) {
|
| 1385 |
if (!redir_isspace(c))
|
| 1386 |
break;
|
| 1387 |
c = url_fgetc(f); |
| 1388 |
} |
| 1389 |
if (c == URL_EOF)
|
| 1390 |
break;
|
| 1391 |
/* record url */
|
| 1392 |
q = buf; |
| 1393 |
for(;;) {
|
| 1394 |
if (c == URL_EOF || redir_isspace(c))
|
| 1395 |
break;
|
| 1396 |
if ((q - buf) < sizeof(buf) - 1) |
| 1397 |
*q++ = c; |
| 1398 |
c = url_fgetc(f); |
| 1399 |
} |
| 1400 |
*q = '\0';
|
| 1401 |
//printf("URL='%s'\n", buf);
|
| 1402 |
/* try to open the media file */
|
| 1403 |
if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0) |
| 1404 |
break;
|
| 1405 |
} |
| 1406 |
*ic_ptr = ic; |
| 1407 |
if (!ic)
|
| 1408 |
return AVERROR_IO;
|
| 1409 |
else
|
| 1410 |
return 0; |
| 1411 |
} |
| 1412 |
|
| 1413 |
AVInputFormat redir_demux = {
|
| 1414 |
"redir",
|
| 1415 |
"Redirector format",
|
| 1416 |
0,
|
| 1417 |
redir_probe, |
| 1418 |
NULL,
|
| 1419 |
NULL,
|
| 1420 |
NULL,
|
| 1421 |
}; |
| 1422 |
|
| 1423 |
int rtsp_init(void) |
| 1424 |
{
|
| 1425 |
av_register_input_format(&rtsp_demux); |
| 1426 |
av_register_input_format(&redir_demux); |
| 1427 |
av_register_input_format(&sdp_demux); |
| 1428 |
return 0; |
| 1429 |
} |