Prepare ffmpeg rebuild

* against libva 2.0.0 (which is currently in testing)
* also include fix for FS#56089

ffmpeg/libfdk_aac/PKGBUILD

@@ -10,7 +10,7 @@
 _name=ffmpeg
 pkgname=ffmpeg-libfdk_aac
 pkgver=3.4
-pkgrel=1
+pkgrel=2
 epoch=1
 pkgdesc='Complete solution to record, convert and stream audio and video (with libfdk-aac support)'
 arch=('i686' 'x86_64')
@@ -32,14 +32,19 @@ provides=('libavcodec.so' 'libavdevice.so' 'libavfilter.so' 'libavformat.so'
           'libswscale.so'
           "ffmpeg=$pkgver")
 conflicts=("$_name")
-source=(https://ffmpeg.org/releases/$_name-$pkgver.tar.xz{,.asc})
+source=(https://ffmpeg.org/releases/$_name-$pkgver.tar.xz{,.asc}
+        'fs56089.patch')
 validpgpkeys=('FCF986EA15E6E293A5644F10B4322F04D67658D8') # ffmpeg-devel
 sha256sums=('aeee06e4d8b18d852c61ebbfe5e1bb7014b1e118e8728c1c2115f91e51bffbef'
-            'SKIP')
+            'SKIP'
+            '0bfcd12d1992903f21c146ae56d9ad89b52818cfb2303197ee905347c25a5427')
 
 prepare() {
   cd ffmpeg-${pkgver}
 
+  # https://bugs.archlinux.org/task/56089
+  # Backport of http://git.videolan.org/?p=ffmpeg.git;a=commitdiff;h=a606f27f4c610708fa96e35eed7b7537d3d8f712
+  patch -Np1 -i ../fs56089.patch
 }
 
 build() {

ffmpeg/libfdk_aac/fs56089.patch

@@ -0,0 +1,84 @@
+diff -rupN ffmpeg-3.4.orig/libavformat/aviobuf.c ffmpeg-3.4/libavformat/aviobuf.c
+--- ffmpeg-3.4.orig/libavformat/aviobuf.c	2017-11-02 14:57:16.078834563 +0100
++++ ffmpeg-3.4/libavformat/aviobuf.c	2017-11-02 15:02:52.549816990 +0100
+@@ -531,6 +531,24 @@ void avio_write_marker(AVIOContext *s, i
+     s->last_time = time;
+ }
+ 
++static int read_packet_wrapper(AVIOContext *s, uint8_t *buf, int size)
++{
++    int ret;
++
++    if (!s->read_packet)
++        return AVERROR_EOF;
++    ret = s->read_packet(s->opaque, buf, size);
++#if FF_API_OLD_AVIO_EOF_0
++    if (!ret && !s->max_packet_size) {
++        av_log(NULL, AV_LOG_WARNING, "Invalid return value 0 for stream protocol\n");
++        ret = AVERROR_EOF;
++    }
++#else
++    av_assert2(ret || s->max_packet_size);
++#endif
++    return ret;
++}
++
+ /* Input stream */
+ 
+ static void fill_buffer(AVIOContext *s)
+@@ -569,10 +587,7 @@ static void fill_buffer(AVIOContext *s)
+         len = s->orig_buffer_size;
+     }
+ 
+-    if (s->read_packet)
+-        len = s->read_packet(s->opaque, dst, len);
+-    else
+-        len = 0;
++    len = read_packet_wrapper(s, dst, len);
+     if (len <= 0) {
+         /* do not modify buffer if EOF reached so that a seek back can
+            be done without rereading data */
+@@ -644,8 +659,7 @@ int avio_read(AVIOContext *s, unsigned c
+         if (len == 0 || s->write_flag) {
+             if((s->direct || size > s->buffer_size) && !s->update_checksum) {
+                 // bypass the buffer and read data directly into buf
+-                if(s->read_packet)
+-                    len = s->read_packet(s->opaque, buf, size);
++                len = read_packet_wrapper(s, buf, size);
+ 
+                 if (len <= 0) {
+                     /* do not modify buffer if EOF reached so that a seek back can
+@@ -711,7 +725,7 @@ int avio_read_partial(AVIOContext *s, un
+         return -1;
+ 
+     if (s->read_packet && s->write_flag) {
+-        len = s->read_packet(s->opaque, buf, size);
++        len = read_packet_wrapper(s, buf, size);
+         if (len > 0)
+             s->pos += len;
+         return len;
+diff -rupN ffmpeg-3.4.orig/libavformat/avio.h ffmpeg-3.4/libavformat/avio.h
+--- ffmpeg-3.4.orig/libavformat/avio.h	2017-11-02 14:57:16.078834563 +0100
++++ ffmpeg-3.4/libavformat/avio.h	2017-11-02 14:59:15.602300896 +0100
+@@ -452,6 +452,8 @@ void avio_free_directory_entry(AVIODirEn
+  * @param write_flag Set to 1 if the buffer should be writable, 0 otherwise.
+  * @param opaque An opaque pointer to user-specific data.
+  * @param read_packet  A function for refilling the buffer, may be NULL.
++ *                     For stream protocols, must never return 0 but rather
++ *                     a proper AVERROR code.
+  * @param write_packet A function for writing the buffer contents, may be NULL.
+  *        The function may not change the input buffers content.
+  * @param seek A function for seeking to specified byte position, may be NULL.
+diff -rupN ffmpeg-3.4.orig/libavformat/version.h ffmpeg-3.4/libavformat/version.h
+--- ffmpeg-3.4.orig/libavformat/version.h	2017-11-02 14:57:16.082167807 +0100
++++ ffmpeg-3.4/libavformat/version.h	2017-11-02 15:04:01.704627612 +0100
+@@ -97,6 +97,9 @@
+ #ifndef FF_API_OLD_ROTATE_API
+ #define FF_API_OLD_ROTATE_API           (LIBAVFORMAT_VERSION_MAJOR < 58)
+ #endif
++#ifndef FF_API_OLD_AVIO_EOF_0
++#define FF_API_OLD_AVIO_EOF_0           (LIBAVFORMAT_VERSION_MAJOR < 58)
++#endif
+ 
+ 
+ #ifndef FF_API_R_FRAME_RATE