Original ffmpeg commit by d52882f Anssi Hannula.
---
doc/protocols.texi | 6 ++++++
libavformat/http.c | 17 ++++++++++++++---
2 files changed, 20 insertions(+), 3 deletions(-)
diff --git a/doc/protocols.texi b/doc/protocols.texi
index 4a98550..ffbb742 100644
--- a/doc/protocols.texi
+++ b/doc/protocols.texi
@@ -114,6 +114,12 @@ If the server supports ICY metadata, and @option{icy} was
set to 1, this
contains the last non-empty metadata packet sent by the server. It should be
polled in regular intervals by applications interested in metadata updates
mid-stream.
+
+@item offset
+Set initial byte offset.
+
+@item end_offset
+Try to limit the request to bytes preceding this offset.
@end table
@section mmst
diff --git a/libavformat/http.c b/libavformat/http.c
index 88265ff..1f66639 100644
--- a/libavformat/http.c
+++ b/libavformat/http.c
@@ -50,8 +50,8 @@ typedef struct {
int line_count;
int http_code;
int64_t chunksize; /**< Used if "Transfer-Encoding: chunked" otherwise
-1. */
- int64_t off, filesize;
char *user_agent;
+ int64_t off, filesize, req_end_offset;
int icy_data_read; ///< how much data was read since last ICY metadata
packet
int icy_metaint; ///< after how many bytes of read data a new
metadata packet will be found
char *location;
@@ -98,6 +98,8 @@ static const AVOption options[] = {
{"basic", "HTTP basic authentication", 0, AV_OPT_TYPE_CONST, {.i64 = HTTP_AUTH_BASIC}, 0,
0, D|E, "auth_type" },
{"send_expect_100", "Force sending an Expect: 100-continue header for POST",
OFFSET(send_expect_100), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, E },
{"location", "The actual location of the data received", OFFSET(location),
AV_OPT_TYPE_STRING, { 0 }, 0, 0, D|E },
+{"offset", "initial byte offset", OFFSET(off), AV_OPT_TYPE_INT64, {.i64 = 0},
0, INT64_MAX, D },
+{"end_offset", "try to limit the request to bytes preceding this offset",
OFFSET(req_end_offset), AV_OPT_TYPE_INT64, {.i64 = 0}, 0, INT64_MAX, D },
{NULL}
};
#define HTTP_CLASS(flavor)\
@@ -514,9 +516,18 @@ static int http_connect(URLContext *h, const char *path,
const char *local_path,
if (!has_header(s->headers, "\r\nAccept: "))
len += av_strlcpy(headers + len, "Accept: */*\r\n",
sizeof(headers) - len);
- if (!has_header(s->headers, "\r\nRange: ") && !post)
+ // Note: we send this on purpose even when s->off is 0 when we're probing,
+ // since it allows us to detect more reliably if a (non-conforming)
+ // server supports seeking by analysing the reply headers.
+ if (!has_header(s->headers, "\r\nRange: ") && !post && (s->off > 0 ||
s->req_end_offset)) {
