Merge remote-tracking branch 'qatar/master'

* qatar/master:
  fix hardcoded tables compililation caused by missing math constants
  lavf: Make codec_tag arrays constant
  twinvq: give massive struct a name.
  lavf, lavu: version bumps and APIchanges for av_gettime() move
  lavfi/audio: don't set cur_buf in ff_filter_samples().
  lavfi/fifo: add audio version of the fifo filter.
  fifo: fix parenthesis placement.
  lavfi: rename vf_fifo.c -> fifo.c
  lavc: remove stats_in from AVCodecContext options table.

Conflicts:
	doc/APIchanges
	libavfilter/Makefile
	libavfilter/allfilters.c
	libavfilter/audio.c
	libavfilter/fifo.c
	libavformat/version.h
	libavutil/avutil.h

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

libavfilter/fifo.c

@@ -0,0 +1,152 @@
+/*
+ * Copyright (c) 2007 Bobby Bingham
+ *
+ * This file is part of FFmpeg.
+ *
+ * FFmpeg is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * FFmpeg is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+/**
+ * @file
+ * FIFO buffering filter
+ */
+
+#include "audio.h"
+#include "avfilter.h"
+#include "internal.h"
+#include "video.h"
+
+typedef struct Buf {
+    AVFilterBufferRef *buf;
+    struct Buf        *next;
+} Buf;
+
+typedef struct {
+    Buf  root;
+    Buf *last;   ///< last buffered frame
+} FifoContext;
+
+static av_cold int init(AVFilterContext *ctx, const char *args, void *opaque)
+{
+    FifoContext *fifo = ctx->priv;
+    fifo->last = &fifo->root;
+
+    av_log(ctx, AV_LOG_INFO, "\n");
+    return 0;
+}
+
+static av_cold void uninit(AVFilterContext *ctx)
+{
+    FifoContext *fifo = ctx->priv;
+    Buf *buf, *tmp;
+
+    for (buf = fifo->root.next; buf; buf = tmp) {
+        tmp = buf->next;
+        avfilter_unref_buffer(buf->buf);
+        av_free(buf);
+    }
+}
+
+static void add_to_queue(AVFilterLink *inlink, AVFilterBufferRef *buf)
+{
+    FifoContext *fifo = inlink->dst->priv;
+
+    fifo->last->next = av_mallocz(sizeof(Buf));
+    fifo->last = fifo->last->next;
+    fifo->last->buf = buf;
+}
+
+static void end_frame(AVFilterLink *inlink) { }
+
+static void draw_slice(AVFilterLink *inlink, int y, int h, int slice_dir) { }
+
+static int request_frame(AVFilterLink *outlink)
+{
+    FifoContext *fifo = outlink->src->priv;
+    Buf *tmp;
+    int ret;
+
+    if (!fifo->root.next) {
+        if ((ret = ff_request_frame(outlink->src->inputs[0])) < 0)
+            return ret;
+    }
+
+    /* by doing this, we give ownership of the reference to the next filter,
+     * so we don't have to worry about dereferencing it ourselves. */
+    switch (outlink->type) {
+    case AVMEDIA_TYPE_VIDEO:
+        ff_start_frame(outlink, fifo->root.next->buf);
+        ff_draw_slice (outlink, 0, outlink->h, 1);
+        ff_end_frame  (outlink);
+        break;
+    case AVMEDIA_TYPE_AUDIO:
+        ff_filter_samples(outlink, fifo->root.next->buf);
+        break;
+    default:
+        return AVERROR(EINVAL);
+    }
+
+    if (fifo->last == fifo->root.next)
+        fifo->last = &fifo->root;
+    tmp = fifo->root.next->next;
+    av_free(fifo->root.next);
+    fifo->root.next = tmp;
+
+    return 0;
+}
+
+AVFilter avfilter_vf_fifo = {
+    .name      = "fifo",
+    .description = NULL_IF_CONFIG_SMALL("Buffer input images and send them when they are requested."),
+
+    .init      = init,
+    .uninit    = uninit,
+
+    .priv_size = sizeof(FifoContext),
+
+    .inputs    = (const AVFilterPad[]) {{ .name      = "default",
+                                    .type            = AVMEDIA_TYPE_VIDEO,
+                                    .get_video_buffer= ff_null_get_video_buffer,
+                                    .start_frame     = add_to_queue,
+                                    .draw_slice      = draw_slice,
+                                    .end_frame       = end_frame,
+                                    .rej_perms       = AV_PERM_REUSE2, },
+                                  { .name = NULL}},
+    .outputs   = (const AVFilterPad[]) {{ .name      = "default",
+                                    .type            = AVMEDIA_TYPE_VIDEO,
+                                    .request_frame   = request_frame, },
+                                  { .name = NULL}},
+};
+
+AVFilter avfilter_af_afifo = {
+    .name        = "afifo",
+    .description = NULL_IF_CONFIG_SMALL("Buffer input frames and send them when they are requested."),
+
+    .init      = init,
+    .uninit    = uninit,
+
+    .priv_size = sizeof(FifoContext),
+
+    .inputs    = (AVFilterPad[]) {{ .name             = "default",
+                                    .type             = AVMEDIA_TYPE_AUDIO,
+                                    .get_audio_buffer = ff_null_get_audio_buffer,
+                                    .filter_samples   = add_to_queue,
+                                    .rej_perms        = AV_PERM_REUSE2, },
+                                  { .name = NULL}},
+    .outputs   = (AVFilterPad[]) {{ .name             = "default",
+                                    .type             = AVMEDIA_TYPE_AUDIO,
+                                    .request_frame    = request_frame, },
+                                  { .name = NULL}},
+};