[FFmpeg-devel] [PATCH 2/4] doc/examples: add directory listing example
Mariusz Szczepańczyk
mszczepanczyk at gmail.com
Sat Mar 28 00:03:15 CET 2015
On Fri, Mar 27, 2015 at 7:09 PM, Michael Niedermayer <michaelni at gmx.at>
wrote:
> On Thu, Mar 26, 2015 at 01:25:18AM +0100, Mariusz Szczepańczyk wrote:
> > From: Lukasz Marek <lukasz.m.luki2 at gmail.com>
> >
> > ---
> > .gitignore | 1 +
> > configure | 2 +
> > doc/Makefile | 1 +
> > doc/examples/Makefile | 3 +-
> > doc/examples/avio_list_dir.c | 105
> +++++++++++++++++++++++++++++++++++++++++++
> > 5 files changed, 111 insertions(+), 1 deletion(-)
> > create mode 100644 doc/examples/avio_list_dir.c
> >
> > diff --git a/.gitignore b/.gitignore
> > index d2088e5..71d4d64 100644
> > --- a/.gitignore
> > +++ b/.gitignore
> > @@ -36,6 +36,7 @@
> > /doc/avoptions_codec.texi
> > /doc/avoptions_format.texi
> > /doc/doxy/html/
> > +/doc/examples/avio_list_dir
> > /doc/examples/avio_reading
> > /doc/examples/decoding_encoding
> > /doc/examples/demuxing_decoding
> > diff --git a/configure b/configure
> > index a96bfb7..cd84d2b 100755
> > --- a/configure
> > +++ b/configure
> > @@ -1321,6 +1321,7 @@ COMPONENT_LIST="
> >
> > EXAMPLE_LIST="
> > avio_reading_example
> > + avio_list_dir_example
> > decoding_encoding_example
> > demuxing_decoding_example
> > extract_mvs_example
> > @@ -2653,6 +2654,7 @@ zoompan_filter_deps="swscale"
> >
> > # examples
> > avio_reading="avformat avcodec avutil"
> > +avio_list_dir="avformat avutil"
> > avcodec_example_deps="avcodec avutil"
> > decoding_encoding_example_deps="avcodec avformat avutil"
> > demuxing_decoding_example_deps="avcodec avformat avutil"
> > diff --git a/doc/Makefile b/doc/Makefile
> > index 697142f..4573531 100644
> > --- a/doc/Makefile
> > +++ b/doc/Makefile
> > @@ -36,6 +36,7 @@ DOCS-$(CONFIG_MANPAGES) += $(MANPAGES)
> > DOCS-$(CONFIG_TXTPAGES) += $(TXTPAGES)
> > DOCS = $(DOCS-yes)
> >
> > +DOC_EXAMPLES-$(CONFIG_AVIO_LIST_DIR_EXAMPLE) += avio_list_dir
> > DOC_EXAMPLES-$(CONFIG_AVIO_READING_EXAMPLE) += avio_reading
> > DOC_EXAMPLES-$(CONFIG_AVCODEC_EXAMPLE) += avcodec
> > DOC_EXAMPLES-$(CONFIG_DECODING_ENCODING_EXAMPLE) += decoding_encoding
> > diff --git a/doc/examples/Makefile b/doc/examples/Makefile
> > index 9f03f04..9699f11 100644
> > --- a/doc/examples/Makefile
> > +++ b/doc/examples/Makefile
> > @@ -11,7 +11,8 @@ CFLAGS += -Wall -g
> > CFLAGS := $(shell pkg-config --cflags $(FFMPEG_LIBS)) $(CFLAGS)
> > LDLIBS := $(shell pkg-config --libs $(FFMPEG_LIBS)) $(LDLIBS)
> >
> > -EXAMPLES= avio_reading \
> > +EXAMPLES= avio_list_dir \
> > + avio_reading \
> > decoding_encoding \
> > demuxing_decoding \
> > extract_mvs \
> > diff --git a/doc/examples/avio_list_dir.c b/doc/examples/avio_list_dir.c
> > new file mode 100644
> > index 0000000..d0e8598
> > --- /dev/null
> > +++ b/doc/examples/avio_list_dir.c
> > @@ -0,0 +1,105 @@
> > +/*
> > + * Copyright (c) 2014 Lukasz Marek
> > + *
> > + * Permission is hereby granted, free of charge, to any person
> obtaining a copy
> > + * of this software and associated documentation files (the
> "Software"), to deal
> > + * in the Software without restriction, including without limitation
> the rights
> > + * to use, copy, modify, merge, publish, distribute, sublicense, and/or
> sell
> > + * copies of the Software, and to permit persons to whom the Software is
> > + * furnished to do so, subject to the following conditions:
> > + *
> > + * The above copyright notice and this permission notice shall be
> included in
> > + * all copies or substantial portions of the Software.
> > + *
> > + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
> EXPRESS OR
> > + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
> MERCHANTABILITY,
> > + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
> SHALL
> > + * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
> OTHER
> > + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> ARISING FROM,
> > + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
> DEALINGS IN
> > + * THE SOFTWARE.
> > + */
> > +
> > +#include <libavcodec/avcodec.h>
> > +#include <libavformat/avformat.h>
> > +#include <libavformat/avio.h>
> > +
> > +static const char *type_string(int type)
> > +{
> > + switch (type) {
> > + case AVIO_ENTRY_DIRECTORY:
> > + return "<DIR>";
> > + case AVIO_ENTRY_FILE:
> > + return "<FILE>";
> > + case AVIO_ENTRY_BLOCK_DEVICE:
> > + return "<BLOCK DEVICE>";
> > + case AVIO_ENTRY_CHARACTER_DEVICE:
> > + return "<CHARACTER DEVICE>";
> > + case AVIO_ENTRY_NAMED_PIPE:
> > + return "<PIPE>";
> > + case AVIO_ENTRY_SYMBOLIC_LINK:
> > + return "<LINK>";
> > + case AVIO_ENTRY_SOCKET:
> > + return "<SOCKET>";
> > + case AVIO_ENTRY_UNKNOWN:
> > + default:
> > + break;
> > + }
> > + return "<UNKNOWN>";
> > +}
> > +
> > +int main(int argc, char *argv[])
> > +{
> > + const char *input_dir = NULL;
> > + AVIODirEntry *entry = NULL;
> > + AVIODirContext *ctx = NULL;
> > + int ret;
> > + char filemode[4];
> > +
> > + av_log_set_level(AV_LOG_DEBUG);
> > +
> > + if (argc != 2) {
> > + fprintf(stderr, "usage: %s input_dir\n"
> > + "API example program to show how to list files in
> directory "
> > + "accessed through AVIOContext.\n", argv[0]);
> > + return 1;
> > + }
> > + input_dir = argv[1];
> > +
> > + /* register codecs and formats and other lavf/lavc components*/
> > + av_register_all();
> > +
> > + if ((ret = avio_open_dir(&ctx, input_dir, NULL)) < 0) {
> > + av_log(NULL, AV_LOG_ERROR, "Cannot open directory: %s.\n",
> av_err2str(ret));
> > + return 1;
> > + }
> > +
>
> > + for (;;) {
> > + if ((ret = avio_read_dir(ctx, &entry)) < 0) {
> > + av_log(NULL, AV_LOG_ERROR, "Cannot list directory: %s.\n",
> av_err2str(ret));
> > + return 1;
> > + }
> > + if (!entry)
> > + break;
> > + if (entry->filemode == -1) {
> > + snprintf(filemode, 4, "???");
> > + } else {
> > + snprintf(filemode, 4, "%3"PRIo64, entry->filemode);
> > + }
> > + av_log(NULL, AV_LOG_INFO, "%-9s %10"PRId64" %30s
> %"PRId64"(%"PRId64") %s %"PRId64" %"PRId64" %"PRId64"\n",
> > + type_string(entry->type),
> > + entry->size,
> > + entry->name,
> > + entry->user_id,
> > + entry->group_id,
> > + filemode,
> > + entry->modification_timestamp,
> > + entry->access_timestamp,
> > + entry->status_change_timestamp);
>
> this seems missing a header line in the printout that lists what
> each column represents
>
I've added the header line.
Mariusz
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