Merge remote branch 'qatar/master'

* qatar/master:
  proto: include os_support.h in network.h
  matroskaenc: don't write an empty Cues element.
  lavc: add a FF_API_REQUEST_CHANNELS deprecation macro
  avio: move extern url_interrupt_cb declaration from avio.h to url.h
  avio: make av_register_protocol2 internal.
  avio: avio_ prefix for url_set_interrupt_cb.
  avio: AVIO_ prefixes for URL_ open flags.
  proto: introduce listen option in tcp
  doc: clarify configure features
  proto: factor ff_network_wait_fd and use it on udp

Conflicts:
	ffmpeg.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>

INSTALL

@@ -9,3 +9,7 @@ path when launching 'configure', e.g. '/ffmpegdir/ffmpeg/configure'.
 2) Then type 'make' to build FFmpeg. GNU Make 3.81 or later is required.
 
 3) Type 'make install' to install all binaries and libraries you built.
+
+NOTICE
+
+ - Non system dependencies (e.g. libx264, libvpx) are disabled by default.

doc/protocols.texi

@@ -402,6 +402,23 @@ ffplay sap://[ff0e::2:7ffe]
 
 Trasmission Control Protocol.
 
+The required syntax for a TCP url is:
+@example
+tcp://@var{hostname}:@var{port}[?@var{options}]
+@end example
+
+@table @option
+
+@item listen
+Listen for an incoming connection
+
+@example
+ffmpeg -i @var{input} -f @var{format} tcp://@var{hostname}:@var{port}?listen
+ffplay tcp://@var{hostname}:@var{port}
+@end example
+
+@end table
+
 @section udp
 
 User Datagram Protocol.

ffmpeg.c

@@ -2569,7 +2569,7 @@ static int transcode(AVFormatContext **output_files,
     if (!using_stdin) {
         if(verbose >= 0)
             fprintf(stderr, "Press [q] to stop encoding\n");
-        url_set_interrupt_cb(decode_interrupt_cb);
+        avio_set_interrupt_cb(decode_interrupt_cb);
     }
     term_init();
 
@@ -3887,7 +3887,7 @@ static void opt_output_file(const char *filename)
         }
 
         /* open the file */
-        if ((err = avio_open(&oc->pb, filename, URL_WRONLY)) < 0) {
+        if ((err = avio_open(&oc->pb, filename, AVIO_WRONLY)) < 0) {
             print_error(filename, err);
             ffmpeg_exit(1);
         }
@@ -4426,7 +4426,7 @@ int main(int argc, char **argv)
 
 #if HAVE_ISATTY
     if(isatty(STDIN_FILENO))
-        url_set_interrupt_cb(decode_interrupt_cb);
+        avio_set_interrupt_cb(decode_interrupt_cb);
 #endif
 
     init_opts();

ffplay.c

@@ -2406,7 +2406,7 @@ static int decode_thread(void *arg)
     is->subtitle_stream = -1;
 
     global_video_state = is;
-    url_set_interrupt_cb(decode_interrupt_cb);
+    avio_set_interrupt_cb(decode_interrupt_cb);
 
     memset(ap, 0, sizeof(*ap));
 
@@ -2626,7 +2626,7 @@ static int decode_thread(void *arg)
         av_close_input_file(is->ic);
         is->ic = NULL; /* safety */
     }
-    url_set_interrupt_cb(NULL);
+    avio_set_interrupt_cb(NULL);
 
     if (ret != 0) {
         SDL_Event event;

ffserver.c

@@ -3427,7 +3427,7 @@ static int rtp_new_av_stream(HTTPContext *c,
                      "rtp://%s:%d", ipaddr, ntohs(dest_addr->sin_port));
         }
 
-        if (url_open(&h, ctx->filename, URL_WRONLY) < 0)
+        if (url_open(&h, ctx->filename, AVIO_WRONLY) < 0)
             goto fail;
         c->rtp_handles[stream_index] = h;
         max_packet_size = url_get_max_packet_size(h);
@@ -3767,7 +3767,7 @@ static void build_feed_streams(void)
             }
 
             /* only write the header of the ffm file */
-            if (avio_open(&s->pb, feed->feed_filename, URL_WRONLY) < 0) {
+            if (avio_open(&s->pb, feed->feed_filename, AVIO_WRONLY) < 0) {
                 http_log("Could not open output feed file '%s'\n",
                          feed->feed_filename);
                 exit(1);

libavcodec/avcodec.h

@@ -2601,7 +2601,7 @@ typedef struct AVCodecContext {
      */
     int64_t timecode_frame_start;
 
-#if LIBAVCODEC_VERSION_MAJOR < 53
+#if FF_API_REQUEST_CHANNELS
     /**
      * Decoder should decode to this many channels if it can (0 for default)
      * - encoding: unused

libavcodec/options.c

@@ -408,7 +408,9 @@ static const AVOption options[]={
 {"timecode_frame_start", "GOP timecode frame start number, in non drop frame format", OFFSET(timecode_frame_start), FF_OPT_TYPE_INT64, 0, 0, INT64_MAX, V|E},
 {"drop_frame_timecode", NULL, 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_DROP_FRAME_TIMECODE, INT_MIN, INT_MAX, V|E, "flags2"},
 {"non_linear_q", "use non linear quantizer", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_NON_LINEAR_QUANT, INT_MIN, INT_MAX, V|E, "flags2"},
+#if FF_API_REQUEST_CHANNELS
 {"request_channels", "set desired number of audio channels", OFFSET(request_channels), FF_OPT_TYPE_INT, DEFAULT, 0, INT_MAX, A|D},
+#endif
 {"drc_scale", "percentage of dynamic range compression to apply", OFFSET(drc_scale), FF_OPT_TYPE_FLOAT, 1.0, 0.0, 1.0, A|D},
 {"reservoir", "use bit reservoir", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_BIT_RESERVOIR, INT_MIN, INT_MAX, A|E, "flags2"},
 {"mbtree", "use macroblock tree ratecontrol (x264 only)", 0, FF_OPT_TYPE_CONST, CODEC_FLAG2_MBTREE, INT_MIN, INT_MAX, V|E, "flags2"},

libavcodec/version.h

@@ -83,5 +83,8 @@
 #ifndef FF_API_ANTIALIAS_ALGO
 #define FF_API_ANTIALIAS_ALGO   (LIBAVCODEC_VERSION_MAJOR < 54)
 #endif
+#ifndef FF_API_REQUEST_CHANNELS
+#define FF_API_REQUEST_CHANNELS (LIBAVCODEC_VERSION_MAJOR < 53)
+#endif
 
 #endif /* AVCODEC_VERSION_H */

libavformat/allformats.c

@@ -21,6 +21,7 @@
 #include "avformat.h"
 #include "rtp.h"
 #include "rdt.h"
+#include "url.h"
 
 #define REGISTER_MUXER(X,x) { \
     extern AVOutputFormat ff_##x##_muxer; \
@@ -34,7 +35,7 @@
 
 #define REGISTER_PROTOCOL(X,x) { \
     extern URLProtocol ff_##x##_protocol; \
-    if(CONFIG_##X##_PROTOCOL) av_register_protocol2(&ff_##x##_protocol, sizeof(ff_##x##_protocol)); }
+    if(CONFIG_##X##_PROTOCOL) ffurl_register_protocol(&ff_##x##_protocol, sizeof(ff_##x##_protocol)); }
 
 void av_register_all(void)
 {

libavformat/applehttp.c

@@ -31,6 +31,7 @@
 #include "internal.h"
 #include <unistd.h>
 #include "avio_internal.h"
+#include "url.h"
 
 #define INITIAL_BUFFER_SIZE 32768
 
@@ -169,7 +170,7 @@ static int parse_playlist(AppleHTTPContext *c, const char *url,
 
     if (!in) {
         close_in = 1;
-        if ((ret = avio_open(&in, url, URL_RDONLY)) < 0)
+        if ((ret = avio_open(&in, url, AVIO_RDONLY)) < 0)
             return ret;
     }
 
@@ -292,7 +293,7 @@ static int read_data(void *opaque, uint8_t *buf, int buf_size)
 
         ret = url_open(&v->input,
                        v->segments[v->cur_seq_no - v->start_seq_no]->url,
-                       URL_RDONLY);
+                       AVIO_RDONLY);
         if (ret < 0)
             return ret;
     }

libavformat/applehttpproto.c

@@ -115,7 +115,7 @@ static int parse_playlist(URLContext *h, const char *url)
     char line[1024];
     const char *ptr;
 
-    if ((ret = avio_open(&in, url, URL_RDONLY)) < 0)
+    if ((ret = avio_open(&in, url, AVIO_RDONLY)) < 0)
         return ret;
 
     read_chomp_line(in, line, sizeof(line));
@@ -180,7 +180,7 @@ static int applehttp_open(URLContext *h, const char *uri, int flags)
     int ret, i;
     const char *nested_url;
 
-    if (flags & (URL_WRONLY | URL_RDWR))
+    if (flags & (AVIO_WRONLY | AVIO_RDWR))
         return AVERROR(ENOSYS);
 
     s = av_mallocz(sizeof(AppleHTTPContext));
@@ -275,7 +275,7 @@ static int applehttp_read(URLContext *h, uint8_t *buf, int size)
     }
     url = s->segments[s->cur_seq_no - s->start_seq_no]->url,
     av_log(NULL, AV_LOG_DEBUG, "opening %s\n", url);
-    ret = ffurl_open(&s->seg_hd, url, URL_RDONLY);
+    ret = ffurl_open(&s->seg_hd, url, AVIO_RDONLY);
     if (ret < 0) {
         if (url_interrupt_cb())
             return AVERROR_EXIT;

libavformat/avio.c

@@ -57,7 +57,7 @@ URLProtocol *av_protocol_next(URLProtocol *p)
     else  return first_protocol;
 }
 
-int av_register_protocol2(URLProtocol *protocol, int size)
+int ffurl_register_protocol(URLProtocol *protocol, int size)
 {
     URLProtocol **p;
     if (size < sizeof(URLProtocol)) {
@@ -86,12 +86,12 @@ struct URLProtocol_compat {
 
 int av_register_protocol(URLProtocol *protocol)
 {
-    return av_register_protocol2(protocol, sizeof(struct URLProtocol_compat));
+    return ffurl_register_protocol(protocol, sizeof(struct URLProtocol_compat));
 }
 
 int register_protocol(URLProtocol *protocol)
 {
-    return av_register_protocol2(protocol, sizeof(struct URLProtocol_compat));
+    return ffurl_register_protocol(protocol, sizeof(struct URLProtocol_compat));
 }
 #endif
 
@@ -144,7 +144,7 @@ int ffurl_connect(URLContext* uc)
         return err;
     uc->is_connected = 1;
     //We must be careful here as ffurl_seek() could be slow, for example for http
-    if(   (uc->flags & (URL_WRONLY | URL_RDWR))
+    if(   (uc->flags & (AVIO_WRONLY | AVIO_RDWR))
        || !strcmp(uc->prot->name, "file"))
         if(!uc->is_streamed && ffurl_seek(uc, 0, SEEK_SET) < 0)
             uc->is_streamed= 1;
@@ -216,6 +216,14 @@ void url_get_filename(URLContext *h, char *buf, int buf_size)
 {
     av_strlcpy(buf, h->filename, buf_size);
 }
+void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
+{
+    avio_set_interrupt_cb(interrupt_cb);
+}
+int av_register_protocol2(URLProtocol *protocol, int size)
+{
+    return ffurl_register_protocol(protocol, size);
+}
 #endif
 
 #define URL_SCHEME_CHARS                        \
@@ -275,7 +283,7 @@ static inline int retry_transfer_wrapper(URLContext *h, unsigned char *buf, int
         ret = transfer_func(h, buf+len, size-len);
         if (ret == AVERROR(EINTR))
             continue;
-        if (h->flags & URL_FLAG_NONBLOCK)
+        if (h->flags & AVIO_FLAG_NONBLOCK)
             return ret;
         if (ret == AVERROR(EAGAIN)) {
             ret = 0;
@@ -296,21 +304,21 @@ static inline int retry_transfer_wrapper(URLContext *h, unsigned char *buf, int
 
 int ffurl_read(URLContext *h, unsigned char *buf, int size)
 {
-    if (h->flags & URL_WRONLY)
+    if (h->flags & AVIO_WRONLY)
         return AVERROR(EIO);
     return retry_transfer_wrapper(h, buf, size, 1, h->prot->url_read);
 }
 
 int ffurl_read_complete(URLContext *h, unsigned char *buf, int size)
 {
-    if (h->flags & URL_WRONLY)
+    if (h->flags & AVIO_WRONLY)
         return AVERROR(EIO);
     return retry_transfer_wrapper(h, buf, size, size, h->prot->url_read);
 }
 
 int ffurl_write(URLContext *h, const unsigned char *buf, int size)
 {
-    if (!(h->flags & (URL_WRONLY | URL_RDWR)))
+    if (!(h->flags & (AVIO_WRONLY | AVIO_RDWR)))
         return AVERROR(EIO);
     /* avoid sending too big packets */
     if (h->max_packet_size && size > h->max_packet_size)
@@ -348,7 +356,7 @@ int ffurl_close(URLContext *h)
 int url_exist(const char *filename)
 {
     URLContext *h;
-    if (ffurl_open(&h, filename, URL_RDONLY) < 0)
+    if (ffurl_open(&h, filename, AVIO_RDONLY) < 0)
         return 0;
     ffurl_close(h);
     return 1;
@@ -381,7 +389,7 @@ static int default_interrupt_cb(void)
     return 0;
 }
 
-void url_set_interrupt_cb(URLInterruptCB *interrupt_cb)
+void avio_set_interrupt_cb(URLInterruptCB *interrupt_cb)
 {
     if (!interrupt_cb)
         interrupt_cb = default_interrupt_cb;

libavformat/avio.h

@@ -63,7 +63,6 @@ typedef struct URLPollEntry {
     int events;
     int revents;
 } URLPollEntry;
-#endif
 
 /**
  * @defgroup open_modes URL open modes
@@ -91,6 +90,7 @@ typedef struct URLPollEntry {
  * silently ignored.
  */
 #define URL_FLAG_NONBLOCK 4
+#endif
 
 typedef int URLInterruptCB(void);
 
@@ -117,6 +117,7 @@ attribute_deprecated void url_get_filename(URLContext *h, char *buf, int buf_siz
 attribute_deprecated int av_url_read_pause(URLContext *h, int pause);
 attribute_deprecated int64_t av_url_read_seek(URLContext *h, int stream_index,
                                               int64_t timestamp, int flags);
+attribute_deprecated void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
 #endif
 
 /**
@@ -131,7 +132,7 @@ int url_exist(const char *url);
  * in this case by the interrupted function. 'NULL' means no interrupt
  * callback is given.
  */
-void url_set_interrupt_cb(URLInterruptCB *interrupt_cb);
+void avio_set_interrupt_cb(URLInterruptCB *interrupt_cb);
 
 #if FF_API_OLD_AVIO
 /* not implemented */
@@ -162,7 +163,9 @@ typedef struct URLProtocol {
 extern URLProtocol *first_protocol;
 #endif
 
+#if FF_API_OLD_AVIO
 extern URLInterruptCB *url_interrupt_cb;
+#endif
 
 /**
  * If protocol is NULL, returns the first registered protocol,
@@ -183,12 +186,14 @@ attribute_deprecated int register_protocol(URLProtocol *protocol);
 attribute_deprecated int av_register_protocol(URLProtocol *protocol);
 #endif
 
+#if FF_API_OLD_AVIO
 /**
  * Register the URLProtocol protocol.
  *
  * @param size the size of the URLProtocol struct referenced
  */
-int av_register_protocol2(URLProtocol *protocol, int size);
+attribute_deprecated int av_register_protocol2(URLProtocol *protocol, int size);
+#endif
 
 #define AVIO_SEEKABLE_NORMAL 0x0001 /**< Seeking works like for a local file */
 
@@ -510,6 +515,33 @@ attribute_deprecated static inline int url_is_streamed(AVIOContext *s)
 int url_resetbuf(AVIOContext *s, int flags);
 #endif
 
+/**
+ * @defgroup open_modes URL open modes
+ * The flags argument to avio_open must be one of the following
+ * constants, optionally ORed with other flags.
+ * @{
+ */
+#define AVIO_RDONLY 0  /**< read-only */
+#define AVIO_WRONLY 1  /**< write-only */
+#define AVIO_RDWR   2  /**< read-write */
+/**
+ * @}
+ */
+
+/**
+ * Use non-blocking mode.
+ * If this flag is set, operations on the context will return
+ * AVERROR(EAGAIN) if they can not be performed immediately.
+ * If this flag is not set, operations on the context will never return
+ * AVERROR(EAGAIN).
+ * Note that this flag does not affect the opening/connecting of the
+ * context. Connecting a protocol will always block if necessary (e.g. on
+ * network protocols) but never hang (e.g. on busy devices).
+ * Warning: non-blocking protocols is work-in-progress; this flag may be
+ * silently ignored.
+ */
+#define AVIO_FLAG_NONBLOCK 4
+
 /**
  * Create and initialize a AVIOContext for accessing the
  * resource indicated by url.