[FFmpeg-devel] [PATCH 2/4] doc/examples: add directory listing example
Michael Niedermayer
michaelni at gmx.at
Fri Mar 27 19:09:52 CET 2015
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
[...]
--
Michael GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB
The bravest are surely those who have the clearest vision
of what is before them, glory and danger alike, and yet
notwithstanding go out to meet it. -- Thucydides
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