timeline: add edl:// URIs

Questionable change from user perspective, but internally needed to
implement the next commit. Also useful for testing timeline stuff.

DOCS/edl-mpv.rst

@@ -92,3 +92,12 @@ to ``20``, ``param3`` to ``value,escaped``, ``param4`` to ``value2``.
 
 Instead of line breaks, the character ``;`` can be used. Line feed bytes and
 ``;`` are treated equally.
+
+Syntax of EDL URIs
+==================
+
+mpv accepts ``inline`` EDL data in form of ``edl://`` URIs. Other than the
+header, the syntax is exactly the same. It's far more convenient to use ``;``
+instead of line breaks, but that is orthogonal.
+
+Example: ``edl://f1.mkv,length=5,start=10;f2.mkv,30,20;f3.mkv``

DOCS/man/en/mpv.rst

@@ -32,6 +32,7 @@ SYNOPSIS
 | **mpv** \mf://[filemask|\@listfile] [-mf options] [options]
 | **mpv** cdda://track[-endtrack][:speed][/device] [options]
 | **mpv** [file|mms[t]|http|httpproxy|rt[s]p|ftp|udp|smb]://[user:pass\@]URL[:port] [options]
+| **mpv** edl://[edl specification as in edl-mpv.rst]
 
 
 DESCRIPTION

Makefile

@@ -234,6 +234,7 @@ SOURCES = audio/audio.c \
           stream/rar.c \
           stream/stream.c \
           stream/stream_avdevice.c \
+          stream/stream_edl.c \
           stream/stream_file.c \
           stream/stream_lavf.c \
           stream/stream_memory.c \

demux/demux_edl.c

@@ -34,6 +34,10 @@ static bool test_header(struct stream *s, char *header)
 static int try_open_file(struct demuxer *demuxer, enum demux_check check)
 {
     struct stream *s = demuxer->stream;
+    if (s->uncached_type == STREAMTYPE_EDL) {
+        demuxer->file_contents = bstr0(s->url);
+        return 0;
+    }
     if (check >= DEMUX_CHECK_UNSAFE) {
         if (!test_header(s, "mplayer EDL file") &&
             !test_header(s, "mpv EDL v0\n"))

mpvcore/player/timeline/tl_edl.c

@@ -70,7 +70,9 @@ void build_edl_timeline(struct MPContext *mpctx)
     struct bstr *lines = bstr_splitlines(tmpmem, mpctx->demuxer->file_contents);
     int linec = MP_TALLOC_ELEMS(lines);
     struct bstr header = bstr0("mplayer EDL file, version ");
-    if (bstr_startswith0(lines[0], "mpv EDL v0\n")) {
+    if (bstr_startswith0(lines[0], "mpv EDL v0\n") ||
+        mpctx->demuxer->stream->uncached_type == STREAMTYPE_EDL)
+    {
         build_mpv_edl_timeline(mpctx);
         goto out;
     }

mpvcore/player/timeline/tl_mpv_edl.c

@@ -268,8 +268,9 @@ void build_mpv_edl_timeline(struct MPContext *mpctx)
         mp_msg(MSGT_CPLAYER, MSGL_ERR, "Error in EDL.\n");
         return;
     }
-    // Don't allow arbitrary paths
-    fix_filenames(parts, mpctx->demuxer->filename);
+    // Source is .edl and not edl:// => don't allow arbitrary paths
+    if (mpctx->demuxer->stream->uncached_type != STREAMTYPE_EDL)
+        fix_filenames(parts, mpctx->demuxer->filename);
     build_timeline(mpctx, parts);
     talloc_free(parts);
 }

stream/stream.c

@@ -78,6 +78,7 @@ extern const stream_info_t stream_info_dvd;
 extern const stream_info_t stream_info_bluray;
 extern const stream_info_t stream_info_rar_filter;
 extern const stream_info_t stream_info_rar_entry;
+extern const stream_info_t stream_info_edl;
 
 static const stream_info_t *const stream_list[] = {
 #if HAVE_VCD
@@ -114,6 +115,7 @@ static const stream_info_t *const stream_list[] = {
     &stream_info_memory,
     &stream_info_null,
     &stream_info_mf,
+    &stream_info_edl,
     &stream_info_rar_filter,
     &stream_info_rar_entry,
     &stream_info_file,

stream/stream.h

@@ -43,6 +43,7 @@ enum streamtype {
     STREAMTYPE_PVR,
     STREAMTYPE_TV,
     STREAMTYPE_MF,
+    STREAMTYPE_EDL,
     STREAMTYPE_AVDEVICE,
 };
 

stream/stream_edl.c

@@ -0,0 +1,21 @@
+// Dummy stream implementation to enable demux_edl, which is in turn a
+// dummy demuxer implementation to enable tl_edl.
+
+#include "stream.h"
+
+static int s_open (struct stream *stream, int mode)
+{
+    if (mode != STREAM_READ)
+        return STREAM_ERROR;
+
+    stream->type = STREAMTYPE_EDL;
+    stream->demuxer = "edl";
+
+    return STREAM_OK;
+}
+
+const stream_info_t stream_info_edl = {
+    .name = "edl",
+    .open = s_open,
+    .protocols = (const char*[]){"edl", NULL},
+};