On 5/14/23 20:05, Michael Niedermayer wrote:
Match url against a list of extensions similar to av_match_ext()
Signed-off-by: Michael Niedermayer <mich...@niedermayer.cc>
---
libavformat/format.c | 25 +++++++++++++++++++++++++
libavformat/internal.h | 9 +++++++++
2 files changed, 34 insertions(+)
diff --git a/libavformat/format.c b/libavformat/format.c
index 52b814e67d..04fdbacec0 100644
--- a/libavformat/format.c
+++ b/libavformat/format.c
@@ -50,6 +50,31 @@ int av_match_ext(const char *filename, const char
*extensions)
return 0;
}
+int ff_match_url_ext(const char *url, const char *extensions)
+{
+ const char *ext;
+ URLComponents uc;
+ int ret;
+ char scratchpad[128];
+
+ if (!url)
+ return 0;
+
+ ret = ff_url_decompose(&uc, url, NULL);
+ if (ret < 0 || !URL_COMPONENT_HAVE(uc, scheme))
+ return ret;
+ for (ext = uc.query; *ext != '.' && ext > uc.path; ext--)
+ ; > +
+ if (*ext != '.')
+ return 0;
+ if (uc.query - ext > sizeof(scratchpad))
+ return AVERROR(ENOMEM); //not enough memory in our scratchpad
+ av_strlcpy(scratchpad, ext + 1, FFMIN(sizeof(scratchpad), uc.query - ext));
This FFMIN is superfluous as sizeof(scratchpad) will always be greater
than or equal to uc.query - ext after the check above it.
+
+ return av_match_name(scratchpad, extensions);
+}
+
const AVOutputFormat *av_guess_format(const char *short_name, const char
*filename,
const char *mime_type)
{
diff --git a/libavformat/internal.h b/libavformat/internal.h
index f575064e8f..43466fbe6d 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -705,6 +705,15 @@ int ff_unlock_avformat(void);
*/
void ff_format_set_url(AVFormatContext *s, char *url);
+/**
+ * Return a positive value if the given url has one of the given
+ * extensions, 0 otherwise.
+ *
+ * @param filename file name to check against the given extensions
Copy/paste error, this should be @param url.
+ * @param extensions a comma-separated list of filename extensions
+ */
+int ff_match_url_ext(const char *url, const char *extensions);
+
struct FFOutputFormat;
void avpriv_register_devices(const struct FFOutputFormat * const o[], const
AVInputFormat * const i[]);
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