diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/rtsp.c')
-rw-r--r-- | contrib/ffmpeg/libavformat/rtsp.c | 1486 |
1 files changed, 0 insertions, 1486 deletions
diff --git a/contrib/ffmpeg/libavformat/rtsp.c b/contrib/ffmpeg/libavformat/rtsp.c deleted file mode 100644 index 7d4c6bf78..000000000 --- a/contrib/ffmpeg/libavformat/rtsp.c +++ /dev/null @@ -1,1486 +0,0 @@ -/* - * RTSP/SDP client - * Copyright (c) 2002 Fabrice Bellard. - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ -#include "avformat.h" - -#include <sys/time.h> -#include <unistd.h> /* for select() prototype */ -#include "network.h" - -#include "rtp_internal.h" - -//#define DEBUG -//#define DEBUG_RTP_TCP - -enum RTSPClientState { - RTSP_STATE_IDLE, - RTSP_STATE_PLAYING, - RTSP_STATE_PAUSED, -}; - -typedef struct RTSPState { - URLContext *rtsp_hd; /* RTSP TCP connexion handle */ - int nb_rtsp_streams; - struct RTSPStream **rtsp_streams; - - enum RTSPClientState state; - int64_t seek_timestamp; - - /* XXX: currently we use unbuffered input */ - // ByteIOContext rtsp_gb; - int seq; /* RTSP command sequence number */ - char session_id[512]; - enum RTSPProtocol protocol; - char last_reply[2048]; /* XXX: allocate ? */ - RTPDemuxContext *cur_rtp; -} RTSPState; - -typedef struct RTSPStream { - URLContext *rtp_handle; /* RTP stream handle */ - RTPDemuxContext *rtp_ctx; /* RTP parse context */ - - int stream_index; /* corresponding stream index, if any. -1 if none (MPEG2TS case) */ - int interleaved_min, interleaved_max; /* interleave ids, if TCP transport */ - char control_url[1024]; /* url for this stream (from SDP) */ - - int sdp_port; /* port (from SDP content - not used in RTSP) */ - struct in_addr sdp_ip; /* IP address (from SDP content - not used in RTSP) */ - int sdp_ttl; /* IP TTL (from SDP content - not used in RTSP) */ - int sdp_payload_type; /* payload type - only used in SDP */ - rtp_payload_data_t rtp_payload_data; /* rtp payload parsing infos from SDP */ - - RTPDynamicProtocolHandler *dynamic_handler; ///< Only valid if it's a dynamic protocol. (This is the handler structure) - void *dynamic_protocol_context; ///< Only valid if it's a dynamic protocol. (This is any private data associated with the dynamic protocol) -} RTSPStream; - -static int rtsp_read_play(AVFormatContext *s); - -/* XXX: currently, the only way to change the protocols consists in - changing this variable */ - -int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_UDP); - -FFRTSPCallback *ff_rtsp_callback = NULL; - -static int rtsp_probe(AVProbeData *p) -{ - if (strstart(p->filename, "rtsp:", NULL)) - return AVPROBE_SCORE_MAX; - return 0; -} - -static int redir_isspace(int c) -{ - return (c == ' ' || c == '\t' || c == '\n' || c == '\r'); -} - -static void skip_spaces(const char **pp) -{ - const char *p; - p = *pp; - while (redir_isspace(*p)) - p++; - *pp = p; -} - -static void get_word_sep(char *buf, int buf_size, const char *sep, - const char **pp) -{ - const char *p; - char *q; - - p = *pp; - if (*p == '/') - p++; - skip_spaces(&p); - q = buf; - while (!strchr(sep, *p) && *p != '\0') { - if ((q - buf) < buf_size - 1) - *q++ = *p; - p++; - } - if (buf_size > 0) - *q = '\0'; - *pp = p; -} - -static void get_word(char *buf, int buf_size, const char **pp) -{ - const char *p; - char *q; - - p = *pp; - skip_spaces(&p); - q = buf; - while (!redir_isspace(*p) && *p != '\0') { - if ((q - buf) < buf_size - 1) - *q++ = *p; - p++; - } - if (buf_size > 0) - *q = '\0'; - *pp = p; -} - -/* parse the rtpmap description: <codec_name>/<clock_rate>[/<other - params>] */ -static int sdp_parse_rtpmap(AVCodecContext *codec, RTSPStream *rtsp_st, int payload_type, const char *p) -{ - char buf[256]; - int i; - AVCodec *c; - const char *c_name; - - /* Loop into AVRtpDynamicPayloadTypes[] and AVRtpPayloadTypes[] and - see if we can handle this kind of payload */ - get_word_sep(buf, sizeof(buf), "/", &p); - if (payload_type >= RTP_PT_PRIVATE) { - RTPDynamicProtocolHandler *handler= RTPFirstDynamicPayloadHandler; - while(handler) { - if (!strcmp(buf, handler->enc_name) && (codec->codec_type == handler->codec_type)) { - codec->codec_id = handler->codec_id; - rtsp_st->dynamic_handler= handler; - if(handler->open) { - rtsp_st->dynamic_protocol_context= handler->open(); - } - break; - } - handler= handler->next; - } - } else { - /* We are in a standard case ( from http://www.iana.org/assignments/rtp-parameters) */ - /* search into AVRtpPayloadTypes[] */ - for (i = 0; AVRtpPayloadTypes[i].pt >= 0; ++i) - if (!strcmp(buf, AVRtpPayloadTypes[i].enc_name) && (codec->codec_type == AVRtpPayloadTypes[i].codec_type)){ - codec->codec_id = AVRtpPayloadTypes[i].codec_id; - break; - } - } - - c = avcodec_find_decoder(codec->codec_id); - if (c && c->name) - c_name = c->name; - else - c_name = (char *)NULL; - - if (c_name) { - get_word_sep(buf, sizeof(buf), "/", &p); - i = atoi(buf); - switch (codec->codec_type) { - case CODEC_TYPE_AUDIO: - av_log(codec, AV_LOG_DEBUG, " audio codec set to : %s\n", c_name); - codec->sample_rate = RTSP_DEFAULT_AUDIO_SAMPLERATE; - codec->channels = RTSP_DEFAULT_NB_AUDIO_CHANNELS; - if (i > 0) { - codec->sample_rate = i; - get_word_sep(buf, sizeof(buf), "/", &p); - i = atoi(buf); - if (i > 0) - codec->channels = i; - // TODO: there is a bug here; if it is a mono stream, and less than 22000Hz, faad upconverts to stereo and twice the - // frequency. No problem, but the sample rate is being set here by the sdp line. Upcoming patch forthcoming. (rdm) - } - av_log(codec, AV_LOG_DEBUG, " audio samplerate set to : %i\n", codec->sample_rate); - av_log(codec, AV_LOG_DEBUG, " audio channels set to : %i\n", codec->channels); - break; - case CODEC_TYPE_VIDEO: - av_log(codec, AV_LOG_DEBUG, " video codec set to : %s\n", c_name); - break; - default: - break; - } - return 0; - } - - return -1; -} - -/* return the length and optionnaly the data */ -static int hex_to_data(uint8_t *data, const char *p) -{ - int c, len, v; - - len = 0; - v = 1; - for(;;) { - skip_spaces(&p); - if (p == '\0') - break; - c = toupper((unsigned char)*p++); - if (c >= '0' && c <= '9') - c = c - '0'; - else if (c >= 'A' && c <= 'F') - c = c - 'A' + 10; - else - break; - v = (v << 4) | c; - if (v & 0x100) { - if (data) - data[len] = v; - len++; - v = 1; - } - } - return len; -} - -static void sdp_parse_fmtp_config(AVCodecContext *codec, char *attr, char *value) -{ - switch (codec->codec_id) { - case CODEC_ID_MPEG4: - case CODEC_ID_AAC: - if (!strcmp(attr, "config")) { - /* decode the hexa encoded parameter */ - int len = hex_to_data(NULL, value); - codec->extradata = av_mallocz(len + FF_INPUT_BUFFER_PADDING_SIZE); - if (!codec->extradata) - return; - codec->extradata_size = len; - hex_to_data(codec->extradata, value); - } - break; - default: - break; - } - return; -} - -typedef struct attrname_map -{ - const char *str; - uint16_t type; - uint32_t offset; -} attrname_map_t; - -/* All known fmtp parmeters and the corresping RTPAttrTypeEnum */ -#define ATTR_NAME_TYPE_INT 0 -#define ATTR_NAME_TYPE_STR 1 -static attrname_map_t attr_names[]= -{ - {"SizeLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, sizelength)}, - {"IndexLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexlength)}, - {"IndexDeltaLength", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, indexdeltalength)}, - {"profile-level-id", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, profile_level_id)}, - {"StreamType", ATTR_NAME_TYPE_INT, offsetof(rtp_payload_data_t, streamtype)}, - {"mode", ATTR_NAME_TYPE_STR, offsetof(rtp_payload_data_t, mode)}, - {NULL, -1, -1}, -}; - -/** parse the attribute line from the fmtp a line of an sdp resonse. This is broken out as a function -* because it is used in rtp_h264.c, which is forthcoming. -*/ -int rtsp_next_attr_and_value(const char **p, char *attr, int attr_size, char *value, int value_size) -{ - skip_spaces(p); - if(**p) - { - get_word_sep(attr, attr_size, "=", p); - if (**p == '=') - (*p)++; - get_word_sep(value, value_size, ";", p); - if (**p == ';') - (*p)++; - return 1; - } - return 0; -} - -/* parse a SDP line and save stream attributes */ -static void sdp_parse_fmtp(AVStream *st, const char *p) -{ - char attr[256]; - char value[4096]; - int i; - - RTSPStream *rtsp_st = st->priv_data; - AVCodecContext *codec = st->codec; - rtp_payload_data_t *rtp_payload_data = &rtsp_st->rtp_payload_data; - - /* loop on each attribute */ - while(rtsp_next_attr_and_value(&p, attr, sizeof(attr), value, sizeof(value))) - { - /* grab the codec extra_data from the config parameter of the fmtp line */ - sdp_parse_fmtp_config(codec, attr, value); - /* Looking for a known attribute */ - for (i = 0; attr_names[i].str; ++i) { - if (!strcasecmp(attr, attr_names[i].str)) { - if (attr_names[i].type == ATTR_NAME_TYPE_INT) - *(int *)((char *)rtp_payload_data + attr_names[i].offset) = atoi(value); - else if (attr_names[i].type == ATTR_NAME_TYPE_STR) - *(char **)((char *)rtp_payload_data + attr_names[i].offset) = av_strdup(value); - } - } - } -} - -/** Parse a string \p in the form of Range:npt=xx-xx, and determine the start - * and end time. - * Used for seeking in the rtp stream. - */ -static void rtsp_parse_range_npt(const char *p, int64_t *start, int64_t *end) -{ - char buf[256]; - - skip_spaces(&p); - if (!stristart(p, "npt=", &p)) - return; - - *start = AV_NOPTS_VALUE; - *end = AV_NOPTS_VALUE; - - get_word_sep(buf, sizeof(buf), "-", &p); - *start = parse_date(buf, 1); - if (*p == '-') { - p++; - get_word_sep(buf, sizeof(buf), "-", &p); - *end = parse_date(buf, 1); - } -// av_log(NULL, AV_LOG_DEBUG, "Range Start: %lld\n", *start); -// av_log(NULL, AV_LOG_DEBUG, "Range End: %lld\n", *end); -} - -typedef struct SDPParseState { - /* SDP only */ - struct in_addr default_ip; - int default_ttl; -} SDPParseState; - -static void sdp_parse_line(AVFormatContext *s, SDPParseState *s1, - int letter, const char *buf) -{ - RTSPState *rt = s->priv_data; - char buf1[64], st_type[64]; - const char *p; - int codec_type, payload_type, i; - AVStream *st; - RTSPStream *rtsp_st; - struct in_addr sdp_ip; - int ttl; - -#ifdef DEBUG - printf("sdp: %c='%s'\n", letter, buf); -#endif - - p = buf; - switch(letter) { - case 'c': - get_word(buf1, sizeof(buf1), &p); - if (strcmp(buf1, "IN") != 0) - return; - get_word(buf1, sizeof(buf1), &p); - if (strcmp(buf1, "IP4") != 0) - return; - get_word_sep(buf1, sizeof(buf1), "/", &p); - if (inet_aton(buf1, &sdp_ip) == 0) - return; - ttl = 16; - if (*p == '/') { - p++; - get_word_sep(buf1, sizeof(buf1), "/", &p); - ttl = atoi(buf1); - } - if (s->nb_streams == 0) { - s1->default_ip = sdp_ip; - s1->default_ttl = ttl; - } else { - st = s->streams[s->nb_streams - 1]; - rtsp_st = st->priv_data; - rtsp_st->sdp_ip = sdp_ip; - rtsp_st->sdp_ttl = ttl; - } - break; - case 's': - pstrcpy(s->title, sizeof(s->title), p); - break; - case 'i': - if (s->nb_streams == 0) { - pstrcpy(s->comment, sizeof(s->comment), p); - break; - } - break; - case 'm': - /* new stream */ - get_word(st_type, sizeof(st_type), &p); - if (!strcmp(st_type, "audio")) { - codec_type = CODEC_TYPE_AUDIO; - } else if (!strcmp(st_type, "video")) { - codec_type = CODEC_TYPE_VIDEO; - } else { - return; - } - rtsp_st = av_mallocz(sizeof(RTSPStream)); - if (!rtsp_st) - return; - rtsp_st->stream_index = -1; - dynarray_add(&rt->rtsp_streams, &rt->nb_rtsp_streams, rtsp_st); - - rtsp_st->sdp_ip = s1->default_ip; - rtsp_st->sdp_ttl = s1->default_ttl; - - get_word(buf1, sizeof(buf1), &p); /* port */ - rtsp_st->sdp_port = atoi(buf1); - - get_word(buf1, sizeof(buf1), &p); /* protocol (ignored) */ - - /* XXX: handle list of formats */ - get_word(buf1, sizeof(buf1), &p); /* format list */ - rtsp_st->sdp_payload_type = atoi(buf1); - - if (!strcmp(AVRtpPayloadTypes[rtsp_st->sdp_payload_type].enc_name, "MP2T")) { - /* no corresponding stream */ - } else { - st = av_new_stream(s, 0); - if (!st) - return; - st->priv_data = rtsp_st; - rtsp_st->stream_index = st->index; - st->codec->codec_type = codec_type; - if (rtsp_st->sdp_payload_type < RTP_PT_PRIVATE) { - /* if standard payload type, we can find the codec right now */ - rtp_get_codec_info(st->codec, rtsp_st->sdp_payload_type); - } - } - /* put a default control url */ - pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), s->filename); - break; - case 'a': - if (strstart(p, "control:", &p) && s->nb_streams > 0) { - char proto[32]; - /* get the control url */ - st = s->streams[s->nb_streams - 1]; - rtsp_st = st->priv_data; - - /* XXX: may need to add full url resolution */ - url_split(proto, sizeof(proto), NULL, 0, NULL, 0, NULL, NULL, 0, p); - if (proto[0] == '\0') { - /* relative control URL */ - pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), "/"); - pstrcat(rtsp_st->control_url, sizeof(rtsp_st->control_url), p); - } else { - pstrcpy(rtsp_st->control_url, sizeof(rtsp_st->control_url), p); - } - } else if (strstart(p, "rtpmap:", &p)) { - /* NOTE: rtpmap is only supported AFTER the 'm=' tag */ - get_word(buf1, sizeof(buf1), &p); - payload_type = atoi(buf1); - for(i = 0; i < s->nb_streams;i++) { - st = s->streams[i]; - rtsp_st = st->priv_data; - if (rtsp_st->sdp_payload_type == payload_type) { - sdp_parse_rtpmap(st->codec, rtsp_st, payload_type, p); - } - } - } else if (strstart(p, "fmtp:", &p)) { - /* NOTE: fmtp is only supported AFTER the 'a=rtpmap:xxx' tag */ - get_word(buf1, sizeof(buf1), &p); - payload_type = atoi(buf1); - for(i = 0; i < s->nb_streams;i++) { - st = s->streams[i]; - rtsp_st = st->priv_data; - if (rtsp_st->sdp_payload_type == payload_type) { - if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) { - if(!rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf)) { - sdp_parse_fmtp(st, p); - } - } else { - sdp_parse_fmtp(st, p); - } - } - } - } else if(strstart(p, "framesize:", &p)) { - // let dynamic protocol handlers have a stab at the line. - get_word(buf1, sizeof(buf1), &p); - payload_type = atoi(buf1); - for(i = 0; i < s->nb_streams;i++) { - st = s->streams[i]; - rtsp_st = st->priv_data; - if (rtsp_st->sdp_payload_type == payload_type) { - if(rtsp_st->dynamic_handler && rtsp_st->dynamic_handler->parse_sdp_a_line) { - rtsp_st->dynamic_handler->parse_sdp_a_line(st, rtsp_st->dynamic_protocol_context, buf); - } - } - } - } else if(strstart(p, "range:", &p)) { - int64_t start, end; - - // this is so that seeking on a streamed file can work. - rtsp_parse_range_npt(p, &start, &end); - s->start_time= start; - s->duration= (end==AV_NOPTS_VALUE)?AV_NOPTS_VALUE:end-start; // AV_NOPTS_VALUE means live broadcast (and can't seek) - } - break; - } -} - -static int sdp_parse(AVFormatContext *s, const char *content) -{ - const char *p; - int letter; - char buf[1024], *q; - SDPParseState sdp_parse_state, *s1 = &sdp_parse_state; - - memset(s1, 0, sizeof(SDPParseState)); - p = content; - for(;;) { - skip_spaces(&p); - letter = *p; - if (letter == '\0') - break; - p++; - if (*p != '=') - goto next_line; - p++; - /* get the content */ - q = buf; - while (*p != '\n' && *p != '\r' && *p != '\0') { - if ((q - buf) < sizeof(buf) - 1) - *q++ = *p; - p++; - } - *q = '\0'; - sdp_parse_line(s, s1, letter, buf); - next_line: - while (*p != '\n' && *p != '\0') - p++; - if (*p == '\n') - p++; - } - return 0; -} - -static void rtsp_parse_range(int *min_ptr, int *max_ptr, const char **pp) -{ - const char *p; - int v; - - p = *pp; - skip_spaces(&p); - v = strtol(p, (char **)&p, 10); - if (*p == '-') { - p++; - *min_ptr = v; - v = strtol(p, (char **)&p, 10); - *max_ptr = v; - } else { - *min_ptr = v; - *max_ptr = v; - } - *pp = p; -} - -/* XXX: only one transport specification is parsed */ -static void rtsp_parse_transport(RTSPHeader *reply, const char *p) -{ - char transport_protocol[16]; - char profile[16]; - char lower_transport[16]; - char parameter[16]; - RTSPTransportField *th; - char buf[256]; - - reply->nb_transports = 0; - - for(;;) { - skip_spaces(&p); - if (*p == '\0') - break; - - th = &reply->transports[reply->nb_transports]; - - get_word_sep(transport_protocol, sizeof(transport_protocol), - "/", &p); - if (*p == '/') - p++; - get_word_sep(profile, sizeof(profile), "/;,", &p); - lower_transport[0] = '\0'; - if (*p == '/') { - p++; - get_word_sep(lower_transport, sizeof(lower_transport), - ";,", &p); - } - if (!strcasecmp(lower_transport, "TCP")) - th->protocol = RTSP_PROTOCOL_RTP_TCP; - else - th->protocol = RTSP_PROTOCOL_RTP_UDP; - - if (*p == ';') - p++; - /* get each parameter */ - while (*p != '\0' && *p != ',') { - get_word_sep(parameter, sizeof(parameter), "=;,", &p); - if (!strcmp(parameter, "port")) { - if (*p == '=') { - p++; - rtsp_parse_range(&th->port_min, &th->port_max, &p); - } - } else if (!strcmp(parameter, "client_port")) { - if (*p == '=') { - p++; - rtsp_parse_range(&th->client_port_min, - &th->client_port_max, &p); - } - } else if (!strcmp(parameter, "server_port")) { - if (*p == '=') { - p++; - rtsp_parse_range(&th->server_port_min, - &th->server_port_max, &p); - } - } else if (!strcmp(parameter, "interleaved")) { - if (*p == '=') { - p++; - rtsp_parse_range(&th->interleaved_min, - &th->interleaved_max, &p); - } - } else if (!strcmp(parameter, "multicast")) { - if (th->protocol == RTSP_PROTOCOL_RTP_UDP) - th->protocol = RTSP_PROTOCOL_RTP_UDP_MULTICAST; - } else if (!strcmp(parameter, "ttl")) { - if (*p == '=') { - p++; - th->ttl = strtol(p, (char **)&p, 10); - } - } else if (!strcmp(parameter, "destination")) { - struct in_addr ipaddr; - - if (*p == '=') { - p++; - get_word_sep(buf, sizeof(buf), ";,", &p); - if (inet_aton(buf, &ipaddr)) - th->destination = ntohl(ipaddr.s_addr); - } - } - while (*p != ';' && *p != '\0' && *p != ',') - p++; - if (*p == ';') - p++; - } - if (*p == ',') - p++; - - reply->nb_transports++; - } -} - -void rtsp_parse_line(RTSPHeader *reply, const char *buf) -{ - const char *p; - - /* NOTE: we do case independent match for broken servers */ - p = buf; - if (stristart(p, "Session:", &p)) { - get_word_sep(reply->session_id, sizeof(reply->session_id), ";", &p); - } else if (stristart(p, "Content-Length:", &p)) { - reply->content_length = strtol(p, NULL, 10); - } else if (stristart(p, "Transport:", &p)) { - rtsp_parse_transport(reply, p); - } else if (stristart(p, "CSeq:", &p)) { - reply->seq = strtol(p, NULL, 10); - } else if (stristart(p, "Range:", &p)) { - rtsp_parse_range_npt(p, &reply->range_start, &reply->range_end); - } -} - -static int url_readbuf(URLContext *h, unsigned char *buf, int size) -{ - int ret, len; - - len = 0; - while (len < size) { - ret = url_read(h, buf+len, size-len); - if (ret < 1) - return ret; - len += ret; - } - return len; -} - -/* skip a RTP/TCP interleaved packet */ -static void rtsp_skip_packet(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - int ret, len, len1; - uint8_t buf[1024]; - - ret = url_readbuf(rt->rtsp_hd, buf, 3); - if (ret != 3) - return; - len = (buf[1] << 8) | buf[2]; -#ifdef DEBUG - printf("skipping RTP packet len=%d\n", len); -#endif - /* skip payload */ - while (len > 0) { - len1 = len; - if (len1 > sizeof(buf)) - len1 = sizeof(buf); - ret = url_readbuf(rt->rtsp_hd, buf, len1); - if (ret != len1) - return; - len -= len1; - } -} - -static void rtsp_send_cmd(AVFormatContext *s, - const char *cmd, RTSPHeader *reply, - unsigned char **content_ptr) -{ - RTSPState *rt = s->priv_data; - char buf[4096], buf1[1024], *q; - unsigned char ch; - const char *p; - int content_length, line_count; - unsigned char *content = NULL; - - memset(reply, 0, sizeof(RTSPHeader)); - - rt->seq++; - pstrcpy(buf, sizeof(buf), cmd); - snprintf(buf1, sizeof(buf1), "CSeq: %d\r\n", rt->seq); - pstrcat(buf, sizeof(buf), buf1); - if (rt->session_id[0] != '\0' && !strstr(cmd, "\nIf-Match:")) { - snprintf(buf1, sizeof(buf1), "Session: %s\r\n", rt->session_id); - pstrcat(buf, sizeof(buf), buf1); - } - pstrcat(buf, sizeof(buf), "\r\n"); -#ifdef DEBUG - printf("Sending:\n%s--\n", buf); -#endif - url_write(rt->rtsp_hd, buf, strlen(buf)); - - /* parse reply (XXX: use buffers) */ - line_count = 0; - rt->last_reply[0] = '\0'; - for(;;) { - q = buf; - for(;;) { - if (url_readbuf(rt->rtsp_hd, &ch, 1) != 1) - break; - if (ch == '\n') - break; - if (ch == '$') { - /* XXX: only parse it if first char on line ? */ - rtsp_skip_packet(s); - } else if (ch != '\r') { - if ((q - buf) < sizeof(buf) - 1) - *q++ = ch; - } - } - *q = '\0'; -#ifdef DEBUG - printf("line='%s'\n", buf); -#endif - /* test if last line */ - if (buf[0] == '\0') - break; - p = buf; - if (line_count == 0) { - /* get reply code */ - get_word(buf1, sizeof(buf1), &p); - get_word(buf1, sizeof(buf1), &p); - reply->status_code = atoi(buf1); - } else { - rtsp_parse_line(reply, p); - pstrcat(rt->last_reply, sizeof(rt->last_reply), p); - pstrcat(rt->last_reply, sizeof(rt->last_reply), "\n"); - } - line_count++; - } - - if (rt->session_id[0] == '\0' && reply->session_id[0] != '\0') - pstrcpy(rt->session_id, sizeof(rt->session_id), reply->session_id); - - content_length = reply->content_length; - if (content_length > 0) { - /* leave some room for a trailing '\0' (useful for simple parsing) */ - content = av_malloc(content_length + 1); - (void)url_readbuf(rt->rtsp_hd, content, content_length); - content[content_length] = '\0'; - } - if (content_ptr) - *content_ptr = content; -} - - -void rtsp_set_callback(FFRTSPCallback *rtsp_cb) -{ - ff_rtsp_callback = rtsp_cb; -} - - -/* close and free RTSP streams */ -static void rtsp_close_streams(RTSPState *rt) -{ - int i; - RTSPStream *rtsp_st; - - for(i=0;i<rt->nb_rtsp_streams;i++) { - rtsp_st = rt->rtsp_streams[i]; - if (rtsp_st) { - if (rtsp_st->rtp_ctx) - rtp_parse_close(rtsp_st->rtp_ctx); - if (rtsp_st->rtp_handle) - url_close(rtsp_st->rtp_handle); - if (rtsp_st->dynamic_handler && rtsp_st->dynamic_protocol_context) - rtsp_st->dynamic_handler->close(rtsp_st->dynamic_protocol_context); - } - av_free(rtsp_st); - } - av_free(rt->rtsp_streams); -} - -static int rtsp_read_header(AVFormatContext *s, - AVFormatParameters *ap) -{ - RTSPState *rt = s->priv_data; - char host[1024], path[1024], tcpname[1024], cmd[2048]; - URLContext *rtsp_hd; - int port, i, j, ret, err; - RTSPHeader reply1, *reply = &reply1; - unsigned char *content = NULL; - RTSPStream *rtsp_st; - int protocol_mask; - AVStream *st; - - /* extract hostname and port */ - url_split(NULL, 0, NULL, 0, - host, sizeof(host), &port, path, sizeof(path), s->filename); - if (port < 0) - port = RTSP_DEFAULT_PORT; - - /* open the tcp connexion */ - snprintf(tcpname, sizeof(tcpname), "tcp://%s:%d", host, port); - if (url_open(&rtsp_hd, tcpname, URL_RDWR) < 0) - return AVERROR_IO; - rt->rtsp_hd = rtsp_hd; - rt->seq = 0; - - /* describe the stream */ - snprintf(cmd, sizeof(cmd), - "DESCRIBE %s RTSP/1.0\r\n" - "Accept: application/sdp\r\n", - s->filename); - rtsp_send_cmd(s, cmd, reply, &content); - if (!content) { - err = AVERROR_INVALIDDATA; - goto fail; - } - if (reply->status_code != RTSP_STATUS_OK) { - err = AVERROR_INVALIDDATA; - goto fail; - } - - /* now we got the SDP description, we parse it */ - ret = sdp_parse(s, (const char *)content); - av_freep(&content); - if (ret < 0) { - err = AVERROR_INVALIDDATA; - goto fail; - } - - protocol_mask = rtsp_default_protocols; - - /* for each stream, make the setup request */ - /* XXX: we assume the same server is used for the control of each - RTSP stream */ - - for(j = RTSP_RTP_PORT_MIN, i = 0; i < rt->nb_rtsp_streams; ++i) { - char transport[2048]; - - rtsp_st = rt->rtsp_streams[i]; - - /* compute available transports */ - transport[0] = '\0'; - - /* RTP/UDP */ - if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP)) { - char buf[256]; - - /* first try in specified port range */ - if (RTSP_RTP_PORT_MIN != 0) { - while(j <= RTSP_RTP_PORT_MAX) { - snprintf(buf, sizeof(buf), "rtp://?localport=%d", j); - if (url_open(&rtsp_st->rtp_handle, buf, URL_RDWR) == 0) { - j += 2; /* we will use two port by rtp stream (rtp and rtcp) */ - goto rtp_opened; - } - } - } - -/* then try on any port -** if (url_open(&rtsp_st->rtp_handle, "rtp://", URL_RDONLY) < 0) { -** err = AVERROR_INVALIDDATA; -** goto fail; -** } -*/ - - rtp_opened: - port = rtp_get_local_port(rtsp_st->rtp_handle); - if (transport[0] != '\0') - pstrcat(transport, sizeof(transport), ","); - snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, - "RTP/AVP/UDP;unicast;client_port=%d-%d", - port, port + 1); - } - - /* RTP/TCP */ - else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_TCP)) { - if (transport[0] != '\0') - pstrcat(transport, sizeof(transport), ","); - snprintf(transport + strlen(transport), sizeof(transport) - strlen(transport) - 1, - "RTP/AVP/TCP"); - } - - else if (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST)) { - if (transport[0] != '\0') - pstrcat(transport, sizeof(transport), ","); - snprintf(transport + strlen(transport), - sizeof(transport) - strlen(transport) - 1, - "RTP/AVP/UDP;multicast"); - } - snprintf(cmd, sizeof(cmd), - "SETUP %s RTSP/1.0\r\n" - "Transport: %s\r\n", - rtsp_st->control_url, transport); - rtsp_send_cmd(s, cmd, reply, NULL); - if (reply->status_code != RTSP_STATUS_OK || - reply->nb_transports != 1) { - err = AVERROR_INVALIDDATA; - goto fail; - } - - /* XXX: same protocol for all streams is required */ - if (i > 0) { - if (reply->transports[0].protocol != rt->protocol) { - err = AVERROR_INVALIDDATA; - goto fail; - } - } else { - rt->protocol = reply->transports[0].protocol; - } - - /* close RTP connection if not choosen */ - if (reply->transports[0].protocol != RTSP_PROTOCOL_RTP_UDP && - (protocol_mask & (1 << RTSP_PROTOCOL_RTP_UDP))) { - url_close(rtsp_st->rtp_handle); - rtsp_st->rtp_handle = NULL; - } - - switch(reply->transports[0].protocol) { - case RTSP_PROTOCOL_RTP_TCP: - rtsp_st->interleaved_min = reply->transports[0].interleaved_min; - rtsp_st->interleaved_max = reply->transports[0].interleaved_max; - break; - - case RTSP_PROTOCOL_RTP_UDP: - { - char url[1024]; - - /* XXX: also use address if specified */ - snprintf(url, sizeof(url), "rtp://%s:%d", - host, reply->transports[0].server_port_min); - if (rtp_set_remote_url(rtsp_st->rtp_handle, url) < 0) { - err = AVERROR_INVALIDDATA; - goto fail; - } - } - break; - case RTSP_PROTOCOL_RTP_UDP_MULTICAST: - { - char url[1024]; - int ttl; - - ttl = reply->transports[0].ttl; - if (!ttl) - ttl = 16; - snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d", - host, - reply->transports[0].server_port_min, - ttl); - if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) { - err = AVERROR_INVALIDDATA; - goto fail; - } - } - break; - } - /* open the RTP context */ - st = NULL; - if (rtsp_st->stream_index >= 0) - st = s->streams[rtsp_st->stream_index]; - if (!st) - s->ctx_flags |= AVFMTCTX_NOHEADER; - rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data); - - if (!rtsp_st->rtp_ctx) { - err = AVERROR_NOMEM; - goto fail; - } else { - if(rtsp_st->dynamic_handler) { - rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context; - rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet; - } - } - } - - /* use callback if available to extend setup */ - if (ff_rtsp_callback) { - if (ff_rtsp_callback(RTSP_ACTION_CLIENT_SETUP, rt->session_id, - NULL, 0, rt->last_reply) < 0) { - err = AVERROR_INVALIDDATA; - goto fail; - } - } - - - rt->state = RTSP_STATE_IDLE; - rt->seek_timestamp = 0; /* default is to start stream at position - zero */ - if (ap->initial_pause) { - /* do not start immediately */ - } else { - if (rtsp_read_play(s) < 0) { - err = AVERROR_INVALIDDATA; - goto fail; - } - } - return 0; - fail: - rtsp_close_streams(rt); - av_freep(&content); - url_close(rt->rtsp_hd); - return err; -} - -static int tcp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, - uint8_t *buf, int buf_size) -{ - RTSPState *rt = s->priv_data; - int id, len, i, ret; - RTSPStream *rtsp_st; - -#ifdef DEBUG_RTP_TCP - printf("tcp_read_packet:\n"); -#endif - redo: - for(;;) { - ret = url_readbuf(rt->rtsp_hd, buf, 1); -#ifdef DEBUG_RTP_TCP - printf("ret=%d c=%02x [%c]\n", ret, buf[0], buf[0]); -#endif - if (ret != 1) - return -1; - if (buf[0] == '$') - break; - } - ret = url_readbuf(rt->rtsp_hd, buf, 3); - if (ret != 3) - return -1; - id = buf[0]; - len = (buf[1] << 8) | buf[2]; -#ifdef DEBUG_RTP_TCP - printf("id=%d len=%d\n", id, len); -#endif - if (len > buf_size || len < 12) - goto redo; - /* get the data */ - ret = url_readbuf(rt->rtsp_hd, buf, len); - if (ret != len) - return -1; - - /* find the matching stream */ - for(i = 0; i < rt->nb_rtsp_streams; i++) { - rtsp_st = rt->rtsp_streams[i]; - if (id >= rtsp_st->interleaved_min && - id <= rtsp_st->interleaved_max) - goto found; - } - goto redo; - found: - *prtsp_st = rtsp_st; - return len; -} - -static int udp_read_packet(AVFormatContext *s, RTSPStream **prtsp_st, - uint8_t *buf, int buf_size) -{ - RTSPState *rt = s->priv_data; - RTSPStream *rtsp_st; - fd_set rfds; - int fd1, fd2, fd_max, n, i, ret; - struct timeval tv; - - for(;;) { - if (url_interrupt_cb()) - return -1; - FD_ZERO(&rfds); - fd_max = -1; - for(i = 0; i < rt->nb_rtsp_streams; i++) { - rtsp_st = rt->rtsp_streams[i]; - /* currently, we cannot probe RTCP handle because of blocking restrictions */ - rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2); - if (fd1 > fd_max) - fd_max = fd1; - FD_SET(fd1, &rfds); - } - tv.tv_sec = 0; - tv.tv_usec = 100 * 1000; - n = select(fd_max + 1, &rfds, NULL, NULL, &tv); - if (n > 0) { - for(i = 0; i < rt->nb_rtsp_streams; i++) { - rtsp_st = rt->rtsp_streams[i]; - rtp_get_file_handles(rtsp_st->rtp_handle, &fd1, &fd2); - if (FD_ISSET(fd1, &rfds)) { - ret = url_read(rtsp_st->rtp_handle, buf, buf_size); - if (ret > 0) { - *prtsp_st = rtsp_st; - return ret; - } - } - } - } - } -} - -static int rtsp_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - RTSPState *rt = s->priv_data; - RTSPStream *rtsp_st; - int ret, len; - uint8_t buf[RTP_MAX_PACKET_LENGTH]; - - /* get next frames from the same RTP packet */ - if (rt->cur_rtp) { - ret = rtp_parse_packet(rt->cur_rtp, pkt, NULL, 0); - if (ret == 0) { - rt->cur_rtp = NULL; - return 0; - } else if (ret == 1) { - return 0; - } else { - rt->cur_rtp = NULL; - } - } - - /* read next RTP packet */ - redo: - switch(rt->protocol) { - default: - case RTSP_PROTOCOL_RTP_TCP: - len = tcp_read_packet(s, &rtsp_st, buf, sizeof(buf)); - break; - case RTSP_PROTOCOL_RTP_UDP: - case RTSP_PROTOCOL_RTP_UDP_MULTICAST: - len = udp_read_packet(s, &rtsp_st, buf, sizeof(buf)); - if (rtsp_st->rtp_ctx) - rtp_check_and_send_back_rr(rtsp_st->rtp_ctx, len); - break; - } - if (len < 0) - return AVERROR_IO; - ret = rtp_parse_packet(rtsp_st->rtp_ctx, pkt, buf, len); - if (ret < 0) - goto redo; - if (ret == 1) { - /* more packets may follow, so we save the RTP context */ - rt->cur_rtp = rtsp_st->rtp_ctx; - } - return 0; -} - -static int rtsp_read_play(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - RTSPHeader reply1, *reply = &reply1; - char cmd[1024]; - - av_log(s, AV_LOG_DEBUG, "hello state=%d\n", rt->state); - - if (rt->state == RTSP_STATE_PAUSED) { - snprintf(cmd, sizeof(cmd), - "PLAY %s RTSP/1.0\r\n", - s->filename); - } else { - snprintf(cmd, sizeof(cmd), - "PLAY %s RTSP/1.0\r\n" - "Range: npt=%0.3f-\r\n", - s->filename, - (double)rt->seek_timestamp / AV_TIME_BASE); - } - rtsp_send_cmd(s, cmd, reply, NULL); - if (reply->status_code != RTSP_STATUS_OK) { - return -1; - } else { - rt->state = RTSP_STATE_PLAYING; - return 0; - } -} - -/* pause the stream */ -static int rtsp_read_pause(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - RTSPHeader reply1, *reply = &reply1; - char cmd[1024]; - - rt = s->priv_data; - - if (rt->state != RTSP_STATE_PLAYING) - return 0; - - snprintf(cmd, sizeof(cmd), - "PAUSE %s RTSP/1.0\r\n", - s->filename); - rtsp_send_cmd(s, cmd, reply, NULL); - if (reply->status_code != RTSP_STATUS_OK) { - return -1; - } else { - rt->state = RTSP_STATE_PAUSED; - return 0; - } -} - -static int rtsp_read_seek(AVFormatContext *s, int stream_index, - int64_t timestamp, int flags) -{ - RTSPState *rt = s->priv_data; - - rt->seek_timestamp = timestamp; - switch(rt->state) { - default: - case RTSP_STATE_IDLE: - break; - case RTSP_STATE_PLAYING: - if (rtsp_read_play(s) != 0) - return -1; - break; - case RTSP_STATE_PAUSED: - rt->state = RTSP_STATE_IDLE; - break; - } - return 0; -} - -static int rtsp_read_close(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - RTSPHeader reply1, *reply = &reply1; - char cmd[1024]; - -#if 0 - /* NOTE: it is valid to flush the buffer here */ - if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) { - url_fclose(&rt->rtsp_gb); - } -#endif - snprintf(cmd, sizeof(cmd), - "TEARDOWN %s RTSP/1.0\r\n", - s->filename); - rtsp_send_cmd(s, cmd, reply, NULL); - - if (ff_rtsp_callback) { - ff_rtsp_callback(RTSP_ACTION_CLIENT_TEARDOWN, rt->session_id, - NULL, 0, NULL); - } - - rtsp_close_streams(rt); - url_close(rt->rtsp_hd); - return 0; -} - -AVInputFormat rtsp_demuxer = { - "rtsp", - "RTSP input format", - sizeof(RTSPState), - rtsp_probe, - rtsp_read_header, - rtsp_read_packet, - rtsp_read_close, - rtsp_read_seek, - .flags = AVFMT_NOFILE, - .read_play = rtsp_read_play, - .read_pause = rtsp_read_pause, -}; - -static int sdp_probe(AVProbeData *p1) -{ - const char *p = p1->buf, *p_end = p1->buf + p1->buf_size; - - /* we look for a line beginning "c=IN IP4" */ - while (p < p_end && *p != '\0') { - if (p + sizeof("c=IN IP4") - 1 < p_end && strstart(p, "c=IN IP4", NULL)) - return AVPROBE_SCORE_MAX / 2; - - while(p < p_end - 1 && *p != '\n') p++; - if (++p >= p_end) - break; - if (*p == '\r') - p++; - } - return 0; -} - -#define SDP_MAX_SIZE 8192 - -static int sdp_read_header(AVFormatContext *s, - AVFormatParameters *ap) -{ - RTSPState *rt = s->priv_data; - RTSPStream *rtsp_st; - int size, i, err; - char *content; - char url[1024]; - AVStream *st; - - /* read the whole sdp file */ - /* XXX: better loading */ - content = av_malloc(SDP_MAX_SIZE); - size = get_buffer(&s->pb, content, SDP_MAX_SIZE - 1); - if (size <= 0) { - av_free(content); - return AVERROR_INVALIDDATA; - } - content[size] ='\0'; - - sdp_parse(s, content); - av_free(content); - - /* open each RTP stream */ - for(i=0;i<rt->nb_rtsp_streams;i++) { - rtsp_st = rt->rtsp_streams[i]; - - snprintf(url, sizeof(url), "rtp://%s:%d?multicast=1&ttl=%d", - inet_ntoa(rtsp_st->sdp_ip), - rtsp_st->sdp_port, - rtsp_st->sdp_ttl); - if (url_open(&rtsp_st->rtp_handle, url, URL_RDWR) < 0) { - err = AVERROR_INVALIDDATA; - goto fail; - } - /* open the RTP context */ - st = NULL; - if (rtsp_st->stream_index >= 0) - st = s->streams[rtsp_st->stream_index]; - if (!st) - s->ctx_flags |= AVFMTCTX_NOHEADER; - rtsp_st->rtp_ctx = rtp_parse_open(s, st, rtsp_st->rtp_handle, rtsp_st->sdp_payload_type, &rtsp_st->rtp_payload_data); - if (!rtsp_st->rtp_ctx) { - err = AVERROR_NOMEM; - goto fail; - } else { - if(rtsp_st->dynamic_handler) { - rtsp_st->rtp_ctx->dynamic_protocol_context= rtsp_st->dynamic_protocol_context; - rtsp_st->rtp_ctx->parse_packet= rtsp_st->dynamic_handler->parse_packet; - } - } - } - return 0; - fail: - rtsp_close_streams(rt); - return err; -} - -static int sdp_read_packet(AVFormatContext *s, - AVPacket *pkt) -{ - return rtsp_read_packet(s, pkt); -} - -static int sdp_read_close(AVFormatContext *s) -{ - RTSPState *rt = s->priv_data; - rtsp_close_streams(rt); - return 0; -} - -#ifdef CONFIG_SDP_DEMUXER -AVInputFormat sdp_demuxer = { - "sdp", - "SDP", - sizeof(RTSPState), - sdp_probe, - sdp_read_header, - sdp_read_packet, - sdp_read_close, -}; -#endif - -/* dummy redirector format (used directly in av_open_input_file now) */ -static int redir_probe(AVProbeData *pd) -{ - const char *p; - p = pd->buf; - while (redir_isspace(*p)) - p++; - if (strstart(p, "http://", NULL) || - strstart(p, "rtsp://", NULL)) - return AVPROBE_SCORE_MAX; - return 0; -} - -/* called from utils.c */ -int redir_open(AVFormatContext **ic_ptr, ByteIOContext *f) -{ - char buf[4096], *q; - int c; - AVFormatContext *ic = NULL; - - /* parse each URL and try to open it */ - c = url_fgetc(f); - while (c != URL_EOF) { - /* skip spaces */ - for(;;) { - if (!redir_isspace(c)) - break; - c = url_fgetc(f); - } - if (c == URL_EOF) - break; - /* record url */ - q = buf; - for(;;) { - if (c == URL_EOF || redir_isspace(c)) - break; - if ((q - buf) < sizeof(buf) - 1) - *q++ = c; - c = url_fgetc(f); - } - *q = '\0'; - //printf("URL='%s'\n", buf); - /* try to open the media file */ - if (av_open_input_file(&ic, buf, NULL, 0, NULL) == 0) - break; - } - *ic_ptr = ic; - if (!ic) - return AVERROR_IO; - else - return 0; -} - -AVInputFormat redir_demuxer = { - "redir", - "Redirector format", - 0, - redir_probe, - NULL, - NULL, - NULL, -}; 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