From 63c07a956bb240ebd5aeb0509953fe80e08e4699 Mon Sep 17 00:00:00 2001 From: Stephan Holljes Date: Fri, 3 Jul 2015 02:25:51 +0200 Subject: lavf/avio: add avio_accept and avio_handshake Signed-off-by: Stephan Holljes --- libavformat/avio.h | 29 +++++++++++++++++++++++++++++ libavformat/aviobuf.c | 17 +++++++++++++++++ 2 files changed, 46 insertions(+) diff --git a/libavformat/avio.h b/libavformat/avio.h index 9b8fcce3eb..06dd7f5ef8 100644 --- a/libavformat/avio.h +++ b/libavformat/avio.h @@ -648,4 +648,33 @@ struct AVBPrint; */ int avio_read_to_bprint(AVIOContext *h, struct AVBPrint *pb, size_t max_size); +/** + * Accept and allocate a client context on a server context. + * @param s the server context + * @param c the client context, must be unallocated + * @return >= 0 on success or a negative value corresponding + * to an AVERROR on failure + */ +int avio_accept(AVIOContext *s, AVIOContext **c); + +/** + * Perform one step of the protocol handshake to accept a new client. + * This function must be called on a client returned by avio_accept() before + * using it as a read/write context. + * It is separate from avio_accept() because it may block. + * A step of the handshake is defined by places where the application may + * decide to change the proceedings. + * For example, on a protocol with a request header and a reply header, each + * one can constitute a step because the application may use the parameters + * from the request to change parameters in the reply; or each individual + * chunk of the request can constitute a step. + * If the handshake is already finished, avio_handshake() does nothing and + * returns 0 immediately. + * + * @param c the client context to perform the handshake on + * @return 0 on a complete and successful handshake + * > 0 if the handshake progressed, but is not complete + * < 0 for an AVERROR code + */ +int avio_handshake(AVIOContext *c); #endif /* AVFORMAT_AVIO_H */ diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c index aceb3bfcb7..1b3d5f5b80 100644 --- a/libavformat/aviobuf.c +++ b/libavformat/aviobuf.c @@ -1021,6 +1021,23 @@ int avio_read_to_bprint(AVIOContext *h, AVBPrint *pb, size_t max_size) return 0; } +int avio_accept(AVIOContext *s, AVIOContext **c) +{ + int ret; + URLContext *sc = s->opaque; + URLContext *cc = NULL; + ret = ffurl_accept(sc, &cc); + if (ret < 0) + return ret; + return ffio_fdopen(c, cc); +} + +int avio_handshake(AVIOContext *c) +{ + URLContext *cc = c->opaque; + return ffurl_handshake(cc); +} + /* output in a dynamic buffer */ typedef struct DynBuffer { -- cgit v1.2.3