[FFmpeg-devel] [PATCH] lavf: add data: URI scheme.
Nicolas George
nicolas.george at normalesup.org
Wed Dec 26 22:49:37 CET 2012
Signed-off-by: Nicolas George <nicolas.george at normalesup.org>
---
Changelog | 1 +
doc/protocols.texi | 8 ++++
libavformat/Makefile | 1 +
libavformat/allformats.c | 1 +
libavformat/data_uri.c | 114 ++++++++++++++++++++++++++++++++++++++++++++++
libavformat/version.h | 4 +-
6 files changed, 127 insertions(+), 2 deletions(-)
create mode 100644 libavformat/data_uri.c
Updated to suit Stefano's comments.
diff --git a/Changelog b/Changelog
index 9eec45c..7b408ef 100644
--- a/Changelog
+++ b/Changelog
@@ -50,6 +50,7 @@ version <next>:
- documentation split into per-component manuals
- pp (postproc) filter ported from MPlayer
- NIST Sphere demuxer
+- data: URI scheme
version 1.0:
diff --git a/doc/protocols.texi b/doc/protocols.texi
index e790459..702a3ea 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -75,6 +75,14 @@ ffplay concat:split1.mpeg\|split2.mpeg\|split3.mpeg
Note that you may need to escape the character "|" which is special for
many shells.
+ at section data
+
+Data in-line in the URI. See @url{http://en.wikipedia.org/wiki/Data_URI_scheme}.
+
+ at example
+ffmpeg -i "data:image/gif;base64,R0lGODdhCAAIAMIEAAAAAAAA//8AAP//AP///////////////ywAAAAACAAIAAADF0gEDLojDgdGiJdJqUX02iB4E8Q9jUMkADs=" smiley.png
+ at end example
+
@section file
File access protocol.
diff --git a/libavformat/Makefile b/libavformat/Makefile
index 587fa42..2787a8a 100644
--- a/libavformat/Makefile
+++ b/libavformat/Makefile
@@ -401,6 +401,7 @@ OBJS-$(CONFIG_BLURAY_PROTOCOL) += bluray.o
OBJS-$(CONFIG_CACHE_PROTOCOL) += cache.o
OBJS-$(CONFIG_CONCAT_PROTOCOL) += concat.o
OBJS-$(CONFIG_CRYPTO_PROTOCOL) += crypto.o
+OBJS-$(CONFIG_DATA_PROTOCOL) += data_uri.o
OBJS-$(CONFIG_FFRTMPCRYPT_PROTOCOL) += rtmpcrypt.o rtmpdh.o
OBJS-$(CONFIG_FFRTMPHTTP_PROTOCOL) += rtmphttp.o
OBJS-$(CONFIG_FILE_PROTOCOL) += file.o
diff --git a/libavformat/allformats.c b/libavformat/allformats.c
index 6b4c27b..432e5b6 100644
--- a/libavformat/allformats.c
+++ b/libavformat/allformats.c
@@ -288,6 +288,7 @@ void av_register_all(void)
REGISTER_PROTOCOL (CACHE, cache);
REGISTER_PROTOCOL (CONCAT, concat);
REGISTER_PROTOCOL (CRYPTO, crypto);
+ REGISTER_PROTOCOL (DATA, data);
REGISTER_PROTOCOL (FFRTMPCRYPT, ffrtmpcrypt);
REGISTER_PROTOCOL (FFRTMPHTTP, ffrtmphttp);
REGISTER_PROTOCOL (FILE, file);
diff --git a/libavformat/data_uri.c b/libavformat/data_uri.c
new file mode 100644
index 0000000..287514a
--- /dev/null
+++ b/libavformat/data_uri.c
@@ -0,0 +1,114 @@
+/*
+ * Copyright (c) 2012 Nicolas George
+ *
+ * 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 <string.h>
+#include "libavutil/avstring.h"
+#include "libavutil/base64.h"
+#include "url.h"
+
+typedef struct {
+ const uint8_t *data;
+ void *tofree;
+ size_t size;
+ size_t pos;
+} DataContext;
+
+static av_cold int data_open(URLContext *h, const char *uri, int flags)
+{
+ DataContext *dc = h->priv_data;
+ const char *data, *opt, *next;
+ char *ddata;
+ int ret, base64 = 0;
+ size_t in_size;
+
+ /* data:content/type[;base64],payload */
+
+ av_strstart(uri, "data:", &uri);
+ data = strchr(uri, ',');
+ if (!data) {
+ av_log(h, AV_LOG_ERROR, "No ',' delimiter\n");
+ return AVERROR(EINVAL);
+ }
+ opt = uri;
+ while (opt < data) {
+ next = av_x_if_null(memchr(opt, ';', data - opt), data);
+ if (opt == uri) {
+ if (!memchr(opt, '/', next - opt)) /* basic validity check */
+ return AVERROR(EINVAL);
+ av_log(h, AV_LOG_VERBOSE, "Content-type: %.*s\n",
+ (int)(next - opt), opt);
+ } else {
+ if (!av_strncasecmp(opt, "base64", next - opt)) {
+ base64 = 1;
+ } else {
+ av_log(h, AV_LOG_VERBOSE, "Ignoring option '%.*s'\n",
+ (int)(next - opt), opt);
+ }
+ }
+ opt = next + 1;
+ }
+
+ data++;
+ in_size = strlen(data);
+ if (base64) {
+ size_t out_size = 3 * in_size / 4 + 1;
+
+ if (out_size > INT_MAX || !(ddata = av_malloc(out_size)))
+ return AVERROR(ENOMEM);
+ if ((ret = av_base64_decode(ddata, data, out_size)) < 0) {
+ av_free(ddata);
+ return ret;
+ }
+ dc->data = dc->tofree = ddata;
+ dc->size = ret;
+ } else {
+ dc->data = data;
+ dc->size = in_size;
+ }
+ return 0;
+}
+
+static av_cold int data_close(URLContext *h)
+{
+ DataContext *dc = h->priv_data;
+
+ av_freep(&dc->tofree);
+ return 0;
+}
+
+static int data_read(URLContext *h, unsigned char *buf, int size)
+{
+ DataContext *dc = h->priv_data;
+
+ if (dc->pos >= dc->size)
+ return AVERROR_EOF;
+ size = FFMIN(size, dc->size - dc->pos);
+ memcpy(buf, dc->data + dc->pos, size);
+ dc->pos += size;
+ return size;
+}
+
+URLProtocol ff_data_protocol = {
+ .name = "data",
+ .url_open = data_open,
+ .url_close = data_close,
+ .url_read = data_read,
+ .priv_data_size = sizeof(DataContext),
+};
diff --git a/libavformat/version.h b/libavformat/version.h
index bd14e56..8a22dd4 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,8 +30,8 @@
#include "libavutil/avutil.h"
#define LIBAVFORMAT_VERSION_MAJOR 54
-#define LIBAVFORMAT_VERSION_MINOR 50
-#define LIBAVFORMAT_VERSION_MICRO 102
+#define LIBAVFORMAT_VERSION_MINOR 51
+#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \
--
1.7.10.4
More information about the ffmpeg-devel
mailing list