o Add a simple "block until data is available or timeout is reached"

  wait mechanism to audio encoding routines. This avoids busy wait
  blocking which needlessly consumes CPU
o Bump PORTREVISION

Submitted by:	Steve O'Hara-Smith <steve@sohara.org>
Obtained from:	ffmpeg CVS repository

1 files changed, 17 insertions, 0 deletions

diff --git a/multimedia/ffmpeg-devel/files/patch-libavformat::audio.c b/multimedia/ffmpeg-devel/files/patch-libavformat::audio.c
new file mode 100644
index 000000000000..375a58dd7280
--- /dev/null
+++ b/multimedia/ffmpeg-devel/files/patch-libavformat::audio.c
@@ -0,0 +1,17 @@
+--- libavformat/audio.c.orig	Wed Feb  5 20:49:08 2003
++++ libavformat/audio.c	Wed Feb  5 20:50:36 2003
+@@ -243,6 +243,14 @@
+     if (av_new_packet(pkt, s->frame_size) < 0)
+         return -EIO;
+     for(;;) {
++        struct timeval tv;
++        fd_set fds;
++        tv.tv_sec = 0;
++        tv.tv_usec = 30 * 1000; /* 30 msecs -- a bit shorter than 1 frame at 30fps */
++        FD_ZERO(&fds);
++        FD_SET(s->fd, &fds);    /* This will block until data is available or we get a timeout */
++        (void) select(s->fd + 1, &fds, 0, 0, &tv);
++
+         ret = read(s->fd, pkt->data, pkt->size);
+         if (ret > 0)
+             break;