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-rw-r--r--libavformat/data_uri.c118
1 files changed, 118 insertions, 0 deletions
diff --git a/libavformat/data_uri.c b/libavformat/data_uri.c
new file mode 100644
index 0000000000..1598b999ae
--- /dev/null
+++ b/libavformat/data_uri.c
@@ -0,0 +1,118 @@
+/*
+ * 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 in URI\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 */
+ av_log(h, AV_LOG_ERROR, "Invalid content-type '%.*s'\n",
+ (int)(next - opt), opt);
+ 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);
+ av_log(h, AV_LOG_ERROR, "Invalid base64 in URI\n");
+ 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),
+};