Merge commit 'a0b7e289'

* commit 'a0b7e289':
  aviobuf: Partial support for reading in read/write contexts
  build: Avoid detecting bogus components named 'x'

Conflicts:
	libavcodec/allcodecs.c
	libavdevice/alldevices.c
	libavformat/allformats.c
	libavformat/aviobuf.c
Merged-by: Michael Niedermayer <michaelni@gmx.at>

libavcodec/allcodecs.c

@@ -48,8 +48,7 @@
             avcodec_register(&ff_##x##_decoder);                        \
     }
 
-/* Warning: do not split this line, it will break configure script */
-#define REGISTER_ENCDEC(X, x) REGISTER_ENCODER(X, x); REGISTER_DECODER(X,x)
+#define REGISTER_ENCDEC(X, x) REGISTER_ENCODER(X, x); REGISTER_DECODER(X, x)
 
 #define REGISTER_PARSER(X, x)                                           \
     {                                                                   \

libavdevice/alldevices.c

@@ -35,7 +35,6 @@
             av_register_input_format(&ff_##x##_demuxer);                \
     }
 
-/* Warning: do not split this line, it will break configure script */
 #define REGISTER_INOUTDEV(X, x) REGISTER_OUTDEV(X, x); REGISTER_INDEV(X, x)
 
 void avdevice_register_all(void)

libavformat/allformats.c

@@ -39,8 +39,7 @@
             av_register_input_format(&ff_##x##_demuxer);                \
     }
 
-/* Warning: do not split this line, it will break configure script */
-#define REGISTER_MUXDEMUX(X, x) REGISTER_MUXER(X, x); REGISTER_DEMUXER(X,x)
+#define REGISTER_MUXDEMUX(X, x) REGISTER_MUXER(X, x); REGISTER_DEMUXER(X, x)
 
 #define REGISTER_PROTOCOL(X, x)                                         \
     {                                                                   \

libavformat/aviobuf.c

@@ -483,7 +483,7 @@ int avio_read(AVIOContext *s, unsigned char *buf, int size)
         len = s->buf_end - s->buf_ptr;
         if (len > size)
             len = size;
-        if (len == 0) {
+        if (len == 0 || s->write_flag) {
             if((s->direct || size > s->buffer_size) && !s->update_checksum){
                 if(s->read_packet)
                     len = s->read_packet(s->opaque, buf, size);
@@ -529,6 +529,13 @@ int ffio_read_partial(AVIOContext *s, unsigned char *buf, int size)
     if (size < 0)
         return -1;
 
+    if (s->read_packet && s->write_flag) {
+        len = s->read_packet(s->opaque, buf, size);
+        if (len > 0)
+            s->pos += len;
+        return len;
+    }
+
     len = s->buf_end - s->buf_ptr;
     if (len == 0) {
         fill_buffer(s);