From ff762d6ed2cfeb9329f5fc8d711003f6f8624eee Mon Sep 17 00:00:00 2001 From: Fabrice Bellard Date: Mon, 10 Nov 2003 18:39:26 +0000 Subject: [PATCH] initial seek support - more generic play/pause support Originally committed as revision 2495 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavformat/rtsp.c | 128 ++++++++++++++++++++++++++++++++------------- libavformat/rtsp.h | 2 + 2 files changed, 93 insertions(+), 37 deletions(-) diff --git a/libavformat/rtsp.c b/libavformat/rtsp.c index 415740ea37d..54ae6c1c3ea 100644 --- a/libavformat/rtsp.c +++ b/libavformat/rtsp.c @@ -31,11 +31,20 @@ //#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 */ @@ -59,9 +68,11 @@ typedef struct RTSPStream { int sdp_payload_type; /* payload type - only used in SDP */ } RTSPStream; +static int rtsp_read_play(AVFormatContext *s); + /* XXX: currently, the only way to change the protocols consists in changing this variable */ -#if 1 +#if 0 int rtsp_default_protocols = (1 << RTSP_PROTOCOL_RTP_TCP) | (1 << RTSP_PROTOCOL_RTP_UDP) | (1 << RTSP_PROTOCOL_RTP_UDP_MULTICAST); #else /* try it if a proxy is used */ @@ -512,6 +523,26 @@ static void rtsp_parse_transport(RTSPHeader *reply, const char *p) } } +static void rtsp_parse_range_npt(RTSPHeader *reply, const char *p) +{ + char buf[256]; + + skip_spaces(&p); + if (!stristart(p, "npt=", &p)) + return; + + reply->range_start = AV_NOPTS_VALUE; + reply->range_end = AV_NOPTS_VALUE; + + get_word_sep(buf, sizeof(buf), "-", &p); + reply->range_start = parse_date(buf, 1); + if (*p == '-') { + p++; + get_word_sep(buf, sizeof(buf), "-", &p); + reply->range_end = parse_date(buf, 1); + } +} + void rtsp_parse_line(RTSPHeader *reply, const char *buf) { const char *p; @@ -526,6 +557,8 @@ void rtsp_parse_line(RTSPHeader *reply, const char *buf) 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(reply, p); } } @@ -856,27 +889,18 @@ static int rtsp_read_header(AVFormatContext *s, } } - /* start playing */ - snprintf(cmd, sizeof(cmd), - "PLAY %s RTSP/1.0\r\n" - "Range: npt=0-\r\n", - s->filename); - rtsp_send_cmd(s, cmd, reply, NULL); - if (reply->status_code != RTSP_STATUS_OK) { - err = AVERROR_INVALIDDATA; - goto fail; - } -#if 0 - /* open TCP with bufferized input */ - if (rt->protocol == RTSP_PROTOCOL_RTP_TCP) { - if (url_fdopen(&rt->rtsp_gb, rt->rtsp_hd) < 0) { - err = AVERROR_NOMEM; + rt->state = RTSP_STATE_IDLE; + rt->seek_timestamp = 0; /* default is to start stream at position + zero */ + if (ap && ap->initial_pause) { + /* do not start immediately */ + } else { + if (rtsp_read_play(s) < 0) { + err = AVERROR_INVALIDDATA; goto fail; } } -#endif - return 0; fail: rtsp_close_streams(rt); @@ -1020,52 +1044,79 @@ static int rtsp_read_packet(AVFormatContext *s, return 0; } -/* pause the stream */ -int rtsp_pause(AVFormatContext *s) +static int rtsp_read_play(AVFormatContext *s) { - RTSPState *rt; + RTSPState *rt = s->priv_data; RTSPHeader reply1, *reply = &reply1; char cmd[1024]; - if (s->iformat != &rtsp_demux) - return -1; - - rt = s->priv_data; - - snprintf(cmd, sizeof(cmd), - "PAUSE %s RTSP/1.0\r\n", - s->filename); + printf("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; } } -/* resume the stream */ -int rtsp_resume(AVFormatContext *s) +/* pause the stream */ +static int rtsp_read_pause(AVFormatContext *s) { - RTSPState *rt; + RTSPState *rt = s->priv_data; RTSPHeader reply1, *reply = &reply1; char cmd[1024]; - if (s->iformat != &rtsp_demux) - return -1; - rt = s->priv_data; + if (rt->state != RTSP_STATE_PLAYING) + return 0; + snprintf(cmd, sizeof(cmd), - "PLAY %s RTSP/1.0\r\n", + "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) +{ + 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; @@ -1101,7 +1152,10 @@ AVInputFormat rtsp_demux = { 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) diff --git a/libavformat/rtsp.h b/libavformat/rtsp.h index 83d88633b5a..3a2713f6558 100644 --- a/libavformat/rtsp.h +++ b/libavformat/rtsp.h @@ -50,6 +50,8 @@ typedef struct RTSPHeader { int content_length; enum RTSPStatusCode status_code; /* response code from server */ int nb_transports; + /* in AV_TIME_BASE unit, AV_NOPTS_VALUE if not used */ + int64_t range_start, range_end; RTSPTransportField transports[RTSP_MAX_TRANSPORTS]; int seq; /* sequence number */ char session_id[512]; -- 2.39.2