[FFmpeg-devel] [PATCH] avformat: Add multi protocol

Michael Niedermayer michael at niedermayer.cc
Tue Jul 19 19:42:30 EEST 2016


On Mon, Jul 18, 2016 at 04:08:59PM +0200, Nicolas George wrote:
> Le primidi 1er thermidor, an CCXXIV, Michael Niedermayer a écrit :
> > TODO: docs, version bump,
> > TODO: option passing support (as seperate commit/patch)
> > 
> > Signed-off-by: Michael Niedermayer <michael at niedermayer.cc>
> > ---
> >  libavformat/Makefile    |    1 +
> >  libavformat/multi.c     |  134 +++++++++++++++++++++++++++++++++++++++++++++++
> >  libavformat/protocols.c |    1 +
> >  3 files changed, 136 insertions(+)
> >  create mode 100644 libavformat/multi.c
> 
> Is it similar to the tee muxer for protocols? If so, maybe use a similar
> name.

yes, renamed it to tee

> 
> > 
> > diff --git a/libavformat/Makefile b/libavformat/Makefile
> > index 6451c1c..b4dd6df 100644
> > --- a/libavformat/Makefile
> > +++ b/libavformat/Makefile
> > @@ -553,6 +553,7 @@ OBJS-$(CONFIG_ICECAST_PROTOCOL)          += icecast.o
> >  OBJS-$(CONFIG_MD5_PROTOCOL)              += md5proto.o
> >  OBJS-$(CONFIG_MMSH_PROTOCOL)             += mmsh.o mms.o asf.o
> >  OBJS-$(CONFIG_MMST_PROTOCOL)             += mmst.o mms.o asf.o
> > +OBJS-$(CONFIG_MULTI_PROTOCOL)            += multi.o
> >  OBJS-$(CONFIG_PIPE_PROTOCOL)             += file.o
> >  OBJS-$(CONFIG_RTMP_PROTOCOL)             += rtmpproto.o rtmppkt.o
> >  OBJS-$(CONFIG_RTMPE_PROTOCOL)            += rtmpproto.o rtmppkt.o
> > diff --git a/libavformat/multi.c b/libavformat/multi.c
> > new file mode 100644
> > index 0000000..f2e4243
> > --- /dev/null
> > +++ b/libavformat/multi.c
> > @@ -0,0 +1,134 @@
> > +/*
> > + * Multi output protocol
> > + * Copyright (c) 2016 Michael Niedermayer
> > + *
> > + * 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 "libavutil/avstring.h"
> > +#include "libavutil/opt.h"
> > +#include "avformat.h"
> > +#include "avio_internal.h"
> > +
> > +typedef struct ChildContext {
> > +    URLContext *url_context;
> > +} ChildContext;
> > +
> > +typedef struct MultiContext {
> > +    const AVClass *class;
> > +    int child_count;
> > +    ChildContext *child;
> > +} MultiContext;
> > +
> > +static const AVOption multi_options[] = {
> > +    { NULL }
> > +};
> > +
> > +static const AVClass multi_class = {
> > +    .class_name = "multi",
> > +    .item_name  = av_default_item_name,
> > +    .option     = multi_options,
> > +    .version    = LIBAVUTIL_VERSION_INT,
> > +};
> > +
> > +static const char *const child_delim = "|";
> > +
> > +static int multi_write(URLContext *h, const unsigned char *buf, int size)
> > +{
> > +    MultiContext *c = h->priv_data;
> > +    int i;
> > +    int main_ret = size;
> > +
> > +    for (i=0; i<c->child_count; i++) {
> > +        int ret = ffurl_write(c->child[i].url_context, buf, size);
> > +        if (ret < 0)
> > +            main_ret = ret;
> > +    }
> > +    return main_ret;
> > +}
> > +
> > +static int multi_close(URLContext *h)
> > +{
> > +    MultiContext *c = h->priv_data;
> > +    int i;
> > +
> > +    for (i=0; i<c->child_count; i++) {
> 
> > +        ffurl_closep(&c->child[i].url_context);
> 
> Return value ignored

fixed

applied

thx

[...]

-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Concerning the gods, I have no means of knowing whether they exist or not
or of what sort they may be, because of the obscurity of the subject, and
the brevity of human life -- Protagoras
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